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Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Coupling climate models with the Earth System Modeling Framework and the Common Component Architecture  

Science Journals Connector (OSTI)

Typical Earth system models involve coupled model components in high-performance computing (HPC) environments. In the last few years, several frameworks have been developed for HPC applications. Two of them are component-based frameworks: the Earth System ... Keywords: climate model, framework, model coupling

S. J. Zhou

2006-02-01T23:59:59.000Z

2

Tile of the document: HVAC system component-based modeling and implementation  

E-Print Network (OSTI)

1 Abstract Tile of the document: HVAC system component-based modeling and implementation Karam the foundation for modeling components that are used in HVAC systems (heating, ventilation, and air conditioning such functionalities. #12;2 HVAC system component-based modeling and implementation By Karam H. Rajab Scholarly

Austin, Mark

3

Atmospheric component of the MPI-M Earth System Model: Bjorn Stevens,1  

E-Print Network (OSTI)

Atmospheric component of the MPI-M Earth System Model: ECHAM6 Bjorn Stevens,1 Marco Giorgetta,1: Stevens, B., et al. (2013), Atmospheric component of the MPI-M Earth System Model: ECHAM6, J. Adv. Model System Model (or MPI-ESM) is described in an accompanying paper (M. Giorgetta et al., Climate change from

Reichler, Thomas

4

The component interaction network approach for modeling of complex thermal systems  

Science Journals Connector (OSTI)

A practical approach for the thermal modeling of complex thermal systems, called the component interaction network (CIN) is presented. Its stages are explained: description of the thermal system as a set of non-overlapping components and their interactions ... Keywords: Component interaction network, Electric furnace, Experimental validation, Heat transfer, Rapid thermal processing, Thermal modeling

K. El Khoury; G. Mouawad; G. El Hitti; M. Nemer

2013-11-01T23:59:59.000Z

5

Modeling Methodology for Component Reuse and System Integration for Hurricane Loss Projection Application  

E-Print Network (OSTI)

Modeling Methodology for Component Reuse and System Integration for Hurricane Loss Projection Distributed Multimedia Information System Laboratory School of Computing and Information Sciences Florida International University, Miami, FL 33199, USA 2 Department of Finance Florida International University, Miami

Chen, Shu-Ching

6

Measuring and Modeling Component and Whole-System Carbon Exchange  

SciTech Connect

We measured ecosystem/atmospheric carbon exchange through a range of methods covering a range of scales. We measured carbon (C) pool and flux for a number of previously poorly quantified ecosystems, developed measurement and modeling methods, and applied these to substantially increase the accuracy and reduce uncertainty in ecosystem/atmospheric C exchange at a range of scales. It appears most upland forests are weak to strong carbon sinks, and status depends largely on disturbance history and age. Net flux from wetland ecosystems appears to be from weak sinks to moderate sources of C to the atmosphere. We found limited evidence for a positive feedback of warming/drying to increased ecosystem C emissions. We further developed multi-source integration and modeling methods, including multiple towers, to scale estimates to landscapes and larger regions.

Paul Bolstad

2006-11-01T23:59:59.000Z

7

Computer aided modeling and simulation of complex physical systems, using components from multiple  

E-Print Network (OSTI)

of Equation-Based Object-Oriented Modeling Languages Department of Computer and Information Science, Linköping. References [1] Modelica Association. Modelica - A Unified Object-Oriented Language for Physical Systems§ Background Computer aided modeling and simulation of complex physical systems, using components

Zhao, Yuxiao

8

Field testing of component-level model-based fault detection methods for mixing boxes and VAV fan systems  

SciTech Connect

An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests of the sort using in commissioning. This paper presents the results of field tests of mixing box and VAV fan system models in an experimental facility and a commercial office building. The models were found to be capable of representing the performance of correctly operating mixing box and VAV fan systems and detecting several types of incorrect operation.

Xu, Peng; Haves, Philip

2002-05-16T23:59:59.000Z

9

Model-Based Sensor Placement for Component Condition Monitoring and Fault Diagnosis in Fossil Energy Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Sensor Placement for Sensor Placement for Component Condition Monitoring and Fault Diagnosis in Fossil Energy Systems Background Fossil fuel power plants generate approximately two-thirds of the world's total electricity and are expected to continue this important role in the years ahead. Increasing global energy demands, aging and inefficient power plants, and increasingly stricter emission requirements will require high levels of performance, available capacity, efficiency, and

10

Battery systems performance studies - HIL components testing...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

systems performance studies - HIL components testing Battery systems performance studies - HIL components testing 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual...

11

Systems and Components Development Expertise [Nuclear Waste Management  

NLE Websites -- All DOE Office Websites (Extended Search)

Systems and Components Systems and Components Development Expertise Nuclear Fuel Cycle and Waste Management Technologies Overview Modeling and analysis Unit Process Modeling Mass Tracking System Software Waste Form Performance Modeling Safety Analysis, Hazard and Risk Evaluations Development, Design, Operation Overview Systems and Components Development Expertise System Engineering Design Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Nuclear Waste Management using Electrometallurgical Technology Systems and Components Development Expertise Bookmark and Share Electrorefiner The electrorefiner: an apparatus used for electrometallurgical treatment of spent nuclear fuel to facilitate storage and ultimate disposal. Click on

12

Coupling Multi-Component Models with MPH on Distributed Memory Computer Architectures  

E-Print Network (OSTI)

Among these, NASAs Earth System Models Framework (ESMF) [to facilitate coupling earth system model components and to

He, Yun; Ding, Chris

2005-01-01T23:59:59.000Z

13

Evaluating the Land and Ocean Components of the Global Carbon Cycle in the CMIP5 Earth System Models  

Science Journals Connector (OSTI)

The authors assess the ability of 18 Earth system models to simulate the land and ocean carbon cycle for the present climate. These models will be used in the next Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) for ...

A. Anav; P. Friedlingstein; M. Kidston; L. Bopp; P. Ciais; P. Cox; C. Jones; M. Jung; R. Myneni; Z. Zhu

2013-09-01T23:59:59.000Z

14

Design of a component-based integrated environmental modeling framework  

Science Journals Connector (OSTI)

Integrated environmental modeling (IEM) includes interdependent science-based components that comprise an appropriate software modeling system and are responsible for consuming and producing information as part of the system, but moving information from ... Keywords: FRAMES, IEM, Integrated environmental modeling, Multimedia modeling, Risk assessment

Gene Whelan, Keewook Kim, Mitch A. Pelton, Karl J. Castleton, Gerard F. Laniak, Kurt Wolfe, Rajbir Parmar, Justin Babendreier, Michael Galvin

2014-05-01T23:59:59.000Z

15

Component and System Qualification Workshop Proceedings  

Energy.gov (U.S. Department of Energy (DOE))

Proceedings from the U.S. DOE Hydrogen Component and System Qualification Workshop, held at Sandia National Laboratory in Livermore, CA, on November 4, 2010.

16

Hybrid solar lighting systems and components  

DOE Patents (OSTI)

A hybrid solar lighting system and components having at least one hybrid solar concentrator, at least one fiber receiver, at least one hybrid luminaire, and a light distribution system operably connected to each hybrid solar concentrator and each hybrid luminaire. A controller operates each component.

Muhs, Jeffrey D. (Lenoir City, TN); Earl, Dennis D. (Knoxville, TN); Beshears, David L. (Knoxville, TN); Maxey, Lonnie C. (Powell, TN); Jordan, John K. (Oak Ridge, TN); Lind, Randall F. (Lenoir City, TN)

2007-06-12T23:59:59.000Z

17

Hybrid solar lighting distribution systems and components  

DOE Patents (OSTI)

A hybrid solar lighting distribution system and components having at least one hybrid solar concentrator, at least one fiber receiver, at least one hybrid luminaire, and a light distribution system operably connected to each hybrid solar concentrator and each hybrid luminaire. A controller operates all components.

Muhs, Jeffrey D. (Lenoir City, TN); Earl, Dennis D. (Knoxville, TN); Beshears, David L. (Knoxville, TN); Maxey, Lonnie C. (Powell, TN); Jordan, John K. (Oak Ridge, TN); Lind, Randall F. (Lenoir City, TN)

2011-07-05T23:59:59.000Z

18

Hot gas path component cooling system  

DOE Patents (OSTI)

A cooling system for a hot gas path component is disclosed. The cooling system may include a component layer and a cover layer. The component layer may include a first inner surface and a second outer surface. The second outer surface may define a plurality of channels. The component layer may further define a plurality of passages extending generally between the first inner surface and the second outer surface. Each of the plurality of channels may be fluidly connected to at least one of the plurality of passages. The cover layer may be situated adjacent the second outer surface of the component layer. The plurality of passages may be configured to flow a cooling medium to the plurality of channels and provide impingement cooling to the cover layer. The plurality of channels may be configured to flow cooling medium therethrough, cooling the cover layer.

Lacy, Benjamin Paul; Bunker, Ronald Scott; Itzel, Gary Michael

2014-02-18T23:59:59.000Z

19

Formal Modeling and Analysis of the HLA Component Integration Standard  

E-Print Network (OSTI)

of domain-speci c integration standards in areas as diverse as programming environments, robotics control 20Formal Modeling and Analysis of the HLA Component Integration Standard Robert J. Allen IBM, Dept An increasingly important trend in the engineering of com- plex systems is the design of component integration

van der Hoek, André

20

A Model-Driven Engineering Framework for Component Models Interoperability  

Science Journals Connector (OSTI)

A multitude of component models exist today, characterized by slightly different conceptual architectural elements, focusing on a specific operational domain, covering different phases of component life-cycle, or supporting analysis of different quality ...

Ivica Crnkovi?; Ivano Malavolta; Henry Muccini

2009-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

NREL: Learning - Advanced Vehicle Systems and Components  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Vehicle Systems and Components Advanced Vehicle Systems and Components Photo of a man checking out an advanced battery using testing equipment that includes a long metal tube on a table top. NREL's researchers test new batteries developed for hybrid electric vehicles. Credit: Warren Gretz Researchers and engineers at the NREL work closely with those in the automotive industry to develop new technologies, such as advanced batteries, for storing energy in cars, trucks, and buses. They also help to develop and test new technologies for using that energy more efficiently. And they work on finding new, energy-efficient ways to reduce the amount of fuel needed to heat and cool the interiors, or cabins, of vehicles. To help develop these new technologies, NREL's researchers are improving the efficiency of vehicle systems and components like these:

22

AVTA Vehicle Component Cost Model | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Vehicle Component Cost Model AVTA Vehicle Component Cost Model 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010...

23

Friction Modeling for Lubricated Engine and Drivetrain Components...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Modeling for Lubricated Engine and Drivetrain Components Friction Modeling for Lubricated Engine and Drivetrain Components 2010 DOE Vehicle Technologies and Hydrogen Programs...

24

System for inspecting large size structural components  

DOE Patents (OSTI)

The present invention relates to a system for inspecting large scale structural components such as concrete walls or the like. The system includes a mobile gamma radiation source and a mobile gamma radiation detector. The source and detector are constructed and arranged for simultaneous movement along parallel paths in alignment with one another on opposite sides of a structural component being inspected. A control system provides signals which coordinate the movements of the source and detector and receives and records the radiation level data developed by the detector as a function of source and detector positions. The radiation level data is then analyzed to identify areas containing defects corresponding to unexpected variations in the radiation levels detected.

Birks, Albert S. (Columbus, OH); Skorpik, James R. (Kennewick, WA)

1990-01-01T23:59:59.000Z

25

Data Transmission System For A Downhole Component  

DOE Patents (OSTI)

The invention is a system for transmitting data through a string of downhole components. In accordance with one aspect of the invention, the system includes a plurality of downhole components, such as sections of pipe in a drill string. Each component has a first and second end, with a first communication element located at the first end and a second communication element located at the second end. Each communication element includes a first contact and a second contact. The system also includes a coaxial cable running between the first and second communication elements, the coaxial cable having a conductive tube and a conductive core within it. The system also includes a first and second connector for connecting the first and second communication elements respectively to the coaxial cable. Each connector includes a conductive sleeve, lying concentrically within the conductive tube, which fits around and makes electrical contact with the conductive core. The conductive sleeve is electrically isolated from the conductive tube. The conductive sleeve of the first connector is in electrical contact with the first contact of the first communication element, the conductive sleeve of the second connector is in electrical contact with the first contact of the second communication element, and the conductive tube is in electrical contact with both the second contact of the first communication element and the second contact of the second communication element.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Fox, Joe (Spanish Fork, UT); Briscoe, Michael (Lehi, UT)

2005-01-18T23:59:59.000Z

26

NREL: Hydrogen and Fuel Cells Research - Hydrogen System Component...  

NLE Websites -- All DOE Office Websites (Extended Search)

other hydrogen system components. Reliable components are needed to ensure the success of hydrogen fueling stations and support the commercial deployment of fuel cell electric...

27

Model-based software component testing.  

E-Print Network (OSTI)

??[Truncated abstract] Software component testing (SCT) is a proven software engineering approach to evaluating, improving and demonstrating component reliability and quality for producing trusted software (more)

Zheng, Weiqun

2012-01-01T23:59:59.000Z

28

A vital component of modern manufacturing systems is the scheduling and control system, which determines com-  

E-Print Network (OSTI)

264 Abstract A vital component of modern manufacturing systems is the scheduling and control system" to the unexpected system changes. Keywords: Scheduling and Control, Simulation Methods and Models Introduction iterative simulation-based scheduling mechanisms for manufacturing systems that operate in dynamic

Kutanoglu, Erhan

29

Modeling the Phillips curve with unobserved components  

E-Print Network (OSTI)

are imposed on the underlying level (core in?ation), since #25;t = (1#0; #11;L)#0;1#22;t + (1#0; #11;L)#0;1"t; t = 1; :::; T 5 1960 1980 2000 0.05 0.00 0.05 0.10 0.15 INFLATION Level 1960 1980 2000 0.01 0.00 0.01 INFLATIONSeasonal 1960 1980 2000 0.05 0... .8 9.0 9.2 log_GDP Level 1985 1990 1995 2000 2005 0.025 0.000 0.025 0.050 0.0 75 INFLATION Level+Cycle 1985 1990 1995 2000 2005 0.02 0.01 0.00 0.01 0.02 0.0 3 log_GDPCycle Figure 5: Smoothed components from a bivariate model for GDP and in?a- tion A...

Harvey, Andrew C

30

Comparison of component frameworks for real-time embedded systems  

Science Journals Connector (OSTI)

The use of components significantly helps in development of real-time embedded systems. There have been a number of component frameworks developed for this purpose, and some of them have already became well established in this area. Even though these ... Keywords: Component frameworks, Component-based development, Real-time and embedded systems

Tom Pop, Petr Hn?tynka, Petr Hoek, Michal Malohlava, Tom Bure

2014-07-01T23:59:59.000Z

31

Impact of Biodiesel on Fuel System Component Durability  

SciTech Connect

A study of the effects of biodiesel blends on fuel system components and the physical characteristics of elastomer materials.

Terry, B.

2005-09-01T23:59:59.000Z

32

Heartbeat Model for Component Failure in Simulation of Plant Behavior  

SciTech Connect

As part of the Department of Energys Light Water Reactor Sustainability Program (LWRSP), tools and methodology for risk-informed characterization of safety margin are being developed for use in supporting decision-making on plant life extension after the first license renewal. Beginning with the traditional discussion of margin in terms of a load (a physical challenge to system or component function) and a capacity (the capability of that system or component to accommodate the challenge), we are developing the capability to characterize realistic probabilistic load and capacity spectra, reflecting both aleatory and epistemic uncertainty in system behavior. This way of thinking about margin comports with work done in the last 10 years. However, current capabilities to model in this way are limited: it is currently possible, but difficult, to validly simulate enough time histories to support quantification in realistic problems, and the treatment of environmental influences on reliability is relatively artificial in many existing applications. The INL is working on a next-generation safety analysis capability (widely referred to as R7) that will enable a much better integration of reliability-related and phenomenology-related aspects of margin. In this paper, we show how to implement cumulative damage (heartbeat) models for component reliability that lend themselves naturally to being included as part of the phenomenology simulation. Implementation of this modeling approach relies on the way in which the phenomenology simulation implements its dynamic time step management. Within this approach, component failures influence the phenomenology, and the phenomenology influences the component failures.

R. W. Youngblood; R. R. Nourgaliev; D. L. Kelly; C. L. Smith; T-N. Dinh

2011-03-01T23:59:59.000Z

33

NREL: Energy Systems Integration Facility - Prototype and Component...  

NLE Websites -- All DOE Office Websites (Extended Search)

DC systems such as commercial microgrids Long-duration reliability and safety tests of battery and energy storage system components Thermal energy storage materials testing...

34

Plutonium Finishing Plant (PFP) HVAC System Component Index  

SciTech Connect

This document lists safety class (SC) and safety significant (SS) components for the Heating Ventilation Air Conditioning (HVAC) and specifies the critical characteristics for Commercial Grade Items (CGI), as required by HNF-PRO-268 and HNF-PRO-18 19. These are the minimum specifications that the equipment must meet in order to properly perform its safety function. There may be several manufacturers or models that meet the critical characteristics for any one item. The Plutonium Finishing Plant (PFP) HVAC System includes sub-systems 25A through 25K. Specific system boundaries and justifications are contained in HNF-SD-CP-SDD-005, ''Definition and Means of Maintaining the Ventilation System Confinement Portion of the PFP Safety Envelope.'' The procurement requirements associated with the system necessitates procurement of some system equipment as Commercial Grade Items in accordance with HNF-PRO-268, ''Control of Purchased Items and Services.''

DIAZ, E.N.

2000-03-30T23:59:59.000Z

35

Describing bond graph models of hydraulic components in Modelica  

Science Journals Connector (OSTI)

In this paper we discuss an object oriented description of bond graph models of hydraulic components by means of the unified modeling language Modelica. A library which is still under development is briefly described and models of some standard hydraulic components are given for illustration. In particular we address the modeling of hydraulic orifices.

W. Borutzky; B. Barnard; J.U. Thoma

2000-01-01T23:59:59.000Z

36

H2A Delivery Components Model and Analysis  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydrogen Delivery Components Model Matt Ringer National Renewable Energy Laboratory February 8, 2005 Other Team Members: Mark Paster: DOE Marianne Mintz, Jerry Gillette, Jay Burke:...

37

Component-based General-purpose Operating System Martin Decky  

E-Print Network (OSTI)

Component-based General-purpose Operating System Martin Deck´y Charles University, Faculty to apply this programming and design paradigm in the domain of general-purpose operating systems. This paper analyzes several nice properties of component systems which might be beneficial in operating

38

A Component Evaluation Tool from the Vehicle System Perspective  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Testbed) is a Modular Hybrid Test Environment for Component Evaluation Emulated electric traction system: *Battery pack simulated *Motor-inverter emulated *Physical motor...

39

Collective and static properties of model two-component plasmas  

SciTech Connect

Classical MD data on the charge-charge dynamic structure factor of two-component plasmas (TCP) modeled in Phys. Rev. A 23, 2041 (1981) are analyzed using the sum rules and other exact relations. The convergent power moments of the imaginary part of the model system dielectric function are expressed in terms of its partial static structure factors, which are computed by the method of hypernetted chains using the Deutsch effective potential. High-frequency asymptotic behavior of the dielectric function is specified to include the effects of inverse bremsstrahlung. The agreement with the MD data is improved, and important statistical characteristics of the model TCP, such as the probability to find both electron and ion at one point, are determined.

Arkhipov, Yu. V.; Askaruly, A.; Davletov, A. E.; Meirkanova, G. M. [Department of Optics and Plasma Physics, al-Farabi Kazakh National University, Tole Bi 96, Almaty 050012 (Kazakhstan); Ballester, D.; Tkachenko, I. M. [Department of Applied Mathematics, Polytechnic University of Valencia, Camino de Vera s/n, 46022 Valencia (Spain)

2007-08-15T23:59:59.000Z

40

Evaluating fugacity models for trace components in landfill gas  

Science Journals Connector (OSTI)

A fugacity approach was evaluated to reconcile loadings of vinyl chloride (chloroethene), benzene, 1,3-butadiene and trichloroethylene in waste with concentrations observed in landfill gas monitoring studies. An evaluative environment derived from fictitious but realistic properties such as volume, composition, and temperature, constructed with data from the Brogborough landfill (UK) test cells was used to test a fugacity approach to generating the source term for use in landfill gas risk assessment models (e.g. GasSim). SOILVE, a dynamic Level II model adapted here for landfills, showed greatest utility for benzene and 1,3-butadiene, modelled under anaerobic conditions over a 10year simulation. Modelled concentrations of these components (95?300?gm?3; 43?gm?3) fell within measured ranges observed in gas from landfills (24?300180?000?gm?3; 2070?gm?3). This study highlights the need (i) for representative and time-referenced biotransformation data; (ii) to evaluate the partitioning characteristics of organic matter within waste systems and (iii) for a better understanding of the role that gas extraction rate (flux) plays in producing trace component concentrations in landfill gas.

Sophie Shafi; Andrew Sweetman; Rupert L. Hough; Richard Smith; Alan Rosevear; Simon J.T. Pollard

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Modeling and analysis of aircraft non-linear components for harmonics analysis  

SciTech Connect

Modern commercial aircraft Electric Power Systems (EPS) include many nonlinear components which produce harmonics. The addition of all the current harmonics could result in a power system with unacceptable levels of voltage distortion. It is important to be able to predict the levels of voltage distortion at early program stages to correct any potential problems and avoid costly redesigns. In this paper the nature and sources of harmonic producing equipment are described. These sources of harmonics and their effect on aircraft power system operation are described. Models for various aircraft non-linear components are developed in this paper. These component models are used in a model of the Boeing 777 EPS which is used to calculate voltage harmonics for various airplane configurations and flight conditions. A description of this model and the models used for various components are given. Tests performed to validate these models are described. Comparison of experimental results with analytical model predictions are given.

Karimi, K.J. [Boeing Computer Services, Seattle, WA (United States); Voss, J. [Boeing Commercial Airplane Group, Seattle, WA (United States)

1995-12-31T23:59:59.000Z

42

Local dynamic update for component-based distributed systems  

Science Journals Connector (OSTI)

Dynamic evolution is a key aspect of the design, development, and maintenance of complex and distributed software systems built by integrating components. Evolution, traditionally obtained by producing software upgrades, may derive from changes in the ... Keywords: component-based distributed system, dynamic reconfiguration, dynamic software update, software evolution

Valerio Panzica La Manna

2012-06-01T23:59:59.000Z

43

Dynamic software update for component-based distributed systems  

Science Journals Connector (OSTI)

Dynamic evolution is a key aspect of the design, development, and maintenance of complex and distributed software systems built by integrating components. Evolution, tradi- tionally obtained by producing software upgrades, may de- rive from changes in ... Keywords: component-based distributed system, dynamic reconfiguration, dynamic software update, software evolution

Valerio Panzica La Manna

2011-06-01T23:59:59.000Z

44

NREL's Building Component Library for Use with Energy Models  

DOE Data Explorer (OSTI)

The Building Component Library (BCL) is the U.S. Department of Energys comprehensive online searchable library of energy modeling building blocks and descriptive metadata. Novice users and seasoned practitioners can use the freely available and uniquely identifiable components to create energy models and cite the sources of input data, which will increase the credibility and reproducibility of their simulations. The BCL contains components which are the building blocks of an energy model. They can represent physical characteristics of the building such as roofs, walls, and windows, or can refer to related operational information such as occupancy and equipment schedules and weather information. Each component is identified through a set of attributes that are specific to its type, as well as other metadata such as provenance information and associated files. The BCL also contains energy conservation measures (ECM), referred to as measures, which describe a change to a building and its associated model. For the BCL, this description attempts to define a measure for reproducible application, either to compare it to a baseline model, to estimate potential energy savings, or to examine the effects of a particular implementation. The BCL currently contains more than 30,000 components and measures. A faceted search mechanism has been implemented on the BCL that allows users to filter through the search results using various facets. Facet categories include component and measure types, data source, and energy modeling software type. All attributes of a component or measure can also be used to filter the results.

45

NREL: TroughNet - Parabolic Trough System and Component Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

System and Component Testing System and Component Testing Here you'll find information about parabolic trough system and components testing, as well facilities and laboratories used for testing. Tests include those for: Concentrator thermal efficiency Receiver thermal performance Mirror contour and collector alignment Mirror reflectivity and durability Some of the following documents are available as Adobe Acrobat PDFs. Download Adobe Reader. Concentrator Thermal Efficiency Testing Researchers and industry use the following facilities for testing parabolic trough collectors. AZTRAK Rotating Platform At Sandia National Laboratories' National Solar Thermal Test Facility (NSTTF), the AZTRAK rotating platform has been used to test several parabolic trough modules and receivers. Initially, researchers tested a

46

Fault Diagnosis System for a Multilevel Inverter Using a Principal Component Neural Network Surin Khomfoi  

E-Print Network (OSTI)

Fault Diagnosis System for a Multilevel Inverter Using a Principal Component Neural Network Surin system in a multilevel-inverter using a compact neural network is proposed in this paper. It is difficult to diagnose a multilevel-inverter drive (MLID) system using a mathematical model because MLID systems consist

Tolbert, Leon M.

47

Models for multimegawatt space power systems  

SciTech Connect

This report describes models for multimegawatt, space power systems which Sandia's Advanced Power Systems Division has constructed to help evaluate space power systems for SDI's Space Power Office. Five system models and models for associated components are presented for both open (power system waste products are exhausted into space) and closed (no waste products) systems: open, burst mode, hydrogen cooled nuclear reactor -- turboalternator system; open, hydrogen-oxygen combustion turboalternator system; closed, nuclear reactor powered Brayton cycle system; closed, liquid metal Rankine cycle system; and closed, in-core, reactor therminonic system. The models estimate performance and mass for the components in each of these systems. 17 refs., 8 figs., 15 tabs.

Edenburn, M.W.

1990-06-01T23:59:59.000Z

48

NASA Research Strategy for Earth System Science: Climate Component  

Science Journals Connector (OSTI)

This paper describes the principles adopted by the NASA Earth Science Enterprise in formulating a comprehensive 20022010 research strategy for earth system science, and outlines one component of this broad interdisciplinary program, focused on ...

Ghassem Asrar; Jack A. Kaye; Pierre Morel

2001-07-01T23:59:59.000Z

49

Chemical kinetic modeling of component mixtures relevant to gasoline  

SciTech Connect

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, a recently revised version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multi-component gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines. Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Curran, H J; Pitz, W J; Westbrook, C K

2009-02-13T23:59:59.000Z

50

System diagnostics using qualitative analysis and component functional classification  

DOE Patents (OSTI)

A method for detecting and identifying faulty component candidates during off-normal operations of nuclear power plants involves the qualitative analysis of macroscopic imbalances in the conservation equations of mass, energy and momentum in thermal-hydraulic control volumes associated with one or more plant components and the functional classification of components. The qualitative analysis of mass and energy is performed through the associated equations of state, while imbalances in momentum are obtained by tracking mass flow rates which are incorporated into a first knowledge base. The plant components are functionally classified, according to their type, as sources or sinks of mass, energy and momentum, depending upon which of the three balance equations is most strongly affected by a faulty component which is incorporated into a second knowledge base. Information describing the connections among the components of the system forms a third knowledge base. The method is particularly adapted for use in a diagnostic expert system to detect and identify faulty component candidates in the presence of component failures and is not limited to use in a nuclear power plant, but may be used with virtually any type of thermal-hydraulic operating system.

Reifman, Jaques (Lisle, IL); Wei, Thomas Y. C. (Downers Grove, IL)

1993-01-01T23:59:59.000Z

51

System diagnostics using qualitative analysis and component functional classification  

DOE Patents (OSTI)

A method for detecting and identifying faulty component candidates during off-normal operations of nuclear power plants involves the qualitative analysis of macroscopic imbalances in the conservation equations of mass, energy and momentum in thermal-hydraulic control volumes associated with one or more plant components and the functional classification of components. The qualitative analysis of mass and energy is performed through the associated equations of state, while imbalances in momentum are obtained by tracking mass flow rates which are incorporated into a first knowledge base. The plant components are functionally classified, according to their type, as sources or sinks of mass, energy and momentum, depending upon which of the three balance equations is most strongly affected by a faulty component which is incorporated into a second knowledge base. Information describing the connections among the components of the system forms a third knowledge base. The method is particularly adapted for use in a diagnostic expert system to detect and identify faulty component candidates in the presence of component failures and is not limited to use in a nuclear power plant, but may be used with virtually any type of thermal-hydraulic operating system. 5 figures.

Reifman, J.; Wei, T.Y.C.

1993-11-23T23:59:59.000Z

52

XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH  

E-Print Network (OSTI)

the characteristics of XML documents, allowing the definition of access control policies that operate with a fine to the integration of the access control system with Web based systems. #12;The analysis contained in this paperCHAPTER 4 XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH E. Damiani1 S. De Capitani di

Samarati, Pierangela

53

From Teleo-Reactive specifications to architectural components: A model-driven approach  

Science Journals Connector (OSTI)

The Teleo-Reactive approach designed by N.J. Nilsson offers a high-level programming model that permits the development of reactive systems, such as robotic vehicles. Teleo-Reactive programs are written in a manner that allows engineers to define the ... Keywords: Component-based software development, Model-driven software development, Reactive systems, Robotics, Teleo-Reactive programs

Pedro SNchez; Diego Alonso; Jos Miguel Morales; Pedro Javier Navarro

2012-11-01T23:59:59.000Z

54

A LIBRARY OF HVAC COMPONENT MODELS FOR USE IN AUTOMATED1 DIAGNOSTICS2  

E-Print Network (OSTI)

A LIBRARY OF HVAC COMPONENT MODELS FOR USE IN AUTOMATED1 DIAGNOSTICS2 3 4 Peng Xu, Philip Haves HVAC system (air handling units and air distribution systems). The models are used to predict of automatic documentation methods in the library. INTRODUCTION The increasing complexity of building HVAC

55

Effect of HVDC component enhancement on the overall system reliability performance  

SciTech Connect

This paper examines several HVDC transmission system component enhancement schemes as they affect the overall system availability using a system model based on a practical system and actual system outage data. A frequency and duration approach is used in modeling the system components such as valve-groups, converter transformers, smoothing reactors, pole, and bipole controls, transmission lines, and the overall system model developed. This model is used to compare the impact on the overall system availability of different methods of HVDC converter enhancement. These methods include the addition of spare converter transformers, spare smoothing reactors, replacement of valves, and increase of converter rating. Finally the costs of typical enhancements are compared with the benefits arising with the improved availability using a cost-benefit analysis.

Kuruganty, S. (Univ. of North Dakota, Grand Forks, ND (United States). Dept. of Electrical Engineering)

1994-01-01T23:59:59.000Z

56

Application of the PC-SAFT equation of state to modeling of solid-liquid equilibria in systems with organic components forming chemical compounds  

Science Journals Connector (OSTI)

Equilibrium diagrams of liquid and solid phases were calculated by the equation of state, based on the perturbed-chain statistical associating fluid theory (PC-SAFT) for binary and ternary systems constituted by....

I. V. Prikhodko; F. Tumakaka; G. Sadowski

2007-04-01T23:59:59.000Z

57

Plug-In Hybrid Electric Vehicles - PHEV Modeling - Component Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies Impact on Fuel Efficiency Technologies Impact on Fuel Efficiency One of the main objectives of the U.S. Department of Energy's (DOE's) Plug-in Hybrid Electric Vehicle (PHEV) R&D Plan (2.2Mb pdf) is to "determine component development requirements" through simulation analysis. Overall fuel efficiency is affected by component technologies from a component sizing and efficiency aspect. To properly define component requirements, several technologies for each of the main components (energy storage, engine and electric machines) are being compared at Argonne using PSAT. Per the R&D plan, several Li-ion battery materials are being modeled to evaluate their impacts on fuel efficiency and vehicle mass. Different Power to Energy ratios are being considered to understand the relative impact of power and energy.

58

Earth System Modeling  

Science Journals Connector (OSTI)

Earth system models are important research tools for improving understanding ... climate system (and maybe never will), Earth system models nowadays typically focus on specific aspects, for...

Patrick Jckel

2012-01-01T23:59:59.000Z

59

Implementing Applications with the Earth System Modeling Framework  

Science Journals Connector (OSTI)

The Earth System Modeling Framework (ESMF) project is developing a standard software platform for Earth system models. The standard defines a component architecture superstructure...

Chris Hill; Cecelia DeLuca; V. Balaji

2006-01-01T23:59:59.000Z

60

The Node Monitoring Component of a Scalable Systems Software Environment  

SciTech Connect

This research describes Fountain, a suite of programs used to monitor the resources of a cluster. A cluster is a collection of individual computers that are connected via a high speed communication network. They are traditionally used by users who desire more resources, such as processing power and memory, than any single computer can provide. A common drawback to effectively utilizing such a large-scale system is the management infrastructure, which often does not often scale well as the system grows. Large-scale parallel systems provide new research challenges in the area of systems software, the programs or tools that manage the system from boot-up to running a parallel job. The approach presented in this thesis utilizes a collection of separate components that communicate with each other to achieve a common goal. While systems software comprises a broad array of components, this thesis focuses on the design choices for a node monitoring component. We will describe Fountain, an implementation of the Scalable Systems Software (SSS) node monitor specification. It is targeted at aggregate node monitoring for clusters, focusing on both scalability and fault tolerance as its design goals. It leverages widely used technologies such as XML and HTTP to present an interface to other components in the SSS environment.

Samuel James Miller

2006-08-09T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

System and method for detecting cells or components thereof  

DOE Patents (OSTI)

A system and method for detecting a detectably labeled cell or component thereof in a sample comprising one or more cells or components thereof, at least one cell or component thereof of which is detectably labeled with at least two detectable labels. In one embodiment, the method comprises: (i) introducing the sample into one or more flow cells of a flow cytometer, (ii) irradiating the sample with one or more light sources that are absorbed by the at least two detectable labels, the absorption of which is to be detected, and (iii) detecting simultaneously the absorption of light by the at least two detectable labels on the detectably labeled cell or component thereof with an array of photomultiplier tubes, which are operably linked to two or more filters that selectively transmit detectable emissions from the at least two detectable labels.

Porter, Marc D. (Ames, IA); Lipert, Robert J. (Ames, IA); Doyle, Robert T. (Ames, IA); Grubisha, Desiree S. (Corona, CA); Rahman, Salma (Ames, IA)

2009-01-06T23:59:59.000Z

62

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Physics-Based Stress Corrosion Cracking Component Reliability Model Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework The Risk-Informed Safety Margin Characterization (RISMC) pathway is a set of activities defined under the U.S. Department of Energy Light Water Reactor Sustainability Program. The overarching objective of RISMC is to support plant life-extension decision-making by providing a state-of-knowledge characterization of safety margins in key systems, structures, and components (SSCs). The methodology emerging from the RISMC pathway is not a conventional probabilistic risk assessment (PRA)-based one; rather, it relies on a reactor systems simulation framework in which

63

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Physics-Based Stress Corrosion Cracking Component Reliability Model Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework The Risk-Informed Safety Margin Characterization (RISMC) pathway is a set of activities defined under the U.S. Department of Energy Light Water Reactor Sustainability Program. The overarching objective of RISMC is to support plant life-extension decision-making by providing a state-of-knowledge characterization of safety margins in key systems, structures, and components (SSCs). The methodology emerging from the RISMC pathway is not a conventional probabilistic risk assessment (PRA)-based one; rather, it relies on a reactor systems simulation framework in which

64

Modeling fabrication of nuclear components: An integrative approach  

SciTech Connect

Reduction of the nuclear weapons stockpile and the general downsizing of the nuclear weapons complex has presented challenges for Los Alamos. One is to design an optimized fabrication facility to manufacture nuclear weapon primary components in an environment of intense regulation and shrinking budgets. This dissertation presents an integrative two-stage approach to modeling the casting operation for fabrication of nuclear weapon primary components. The first stage optimizes personnel radiation exposure for the casting operation layout by modeling the operation as a facility layout problem formulated as a quadratic assignment problem. The solution procedure uses an evolutionary heuristic technique. The best solutions to the layout problem are used as input to the second stage - a simulation model that assesses the impact of competing layouts on operational performance. The focus of the simulation model is to determine the layout that minimizes personnel radiation exposures and nuclear material movement, and maximizes the utilization of capacity for finished units.

Hench, K.W.

1996-08-01T23:59:59.000Z

65

Mercury exosphere I. Global circulation model of its sodium component  

E-Print Network (OSTI)

Mercury exosphere I. Global circulation model of its sodium component Francois Leblanc a,*, R 2010 Accepted 27 April 2010 Available online 5 May 2010 Keywords: Mercury, Atmosphere Aeronomy a b s t r a c t Our understanding of Mercury's sodium exosphere has improved considerably in the last 5

Johnson, Robert E.

66

A Denotational Model for Component-Based Risk Analysis  

E-Print Network (OSTI)

matches the value of the assets to be protected. A certain level of risk may be acceptable if the riskA Denotational Model for Component-Based Risk Analysis Gyrd Brændeland1,2, , Atle Refsdal2 , and Ketil Stølen1,2 1 Department of Informatics, University of Oslo, Norway 2 SINTEF, Norway Abstract. Risk

Stølen, Ketil

67

REED-SOLOMON BEHAVIORAL VIRTUAL COMPONENT FOR COMMUNICATION SYSTEMS  

E-Print Network (OSTI)

REED-SOLOMON BEHAVIORAL VIRTUAL COMPONENT FOR COMMUNICATION SYSTEMS B. Le Gal1 , E. Casseau1 , C has been successfully applied to the design of a Reed-Solomon (RS) decoder IP core, targeting the DVB of the applications and of the IPs themselves require methodologies to be used, from the side of IP providers as well

Paris-Sud XI, Université de

68

ECOSYSTEM COMPONENT CHARACTERIZATION 461 Failing or nearby septic tank systems  

E-Print Network (OSTI)

ECOSYSTEM COMPONENT CHARACTERIZATION 461 · Failing or nearby septic tank systems · Exfiltration from sanitary sewers in poor repair · Leaking underground storage tanks and pipes · Landfill seepage or natural environment Leaks from underground storage tanks and pipes are a common source of soil

Pitt, Robert E.

69

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM  

E-Print Network (OSTI)

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM E.N. Dementiev, V.R. Kozak, E.V. Tararyshkin, A.G. Tribendis, E.N. Shubin, Abstract This article considers the architecture of the control architecture depended on several factors specific to both the facility itself and the control equipment used

Kozak, Victor R.

70

Coupling Multi-Component Models with MPH on Distributed MemoryComputer Architectures  

SciTech Connect

A growing trend in developing large and complex applications on today's Teraflop scale computers is to integrate stand-alone and/or semi-independent program components into a comprehensive simulation package. One example is the Community Climate System Model which consists of atmosphere, ocean, land-surface and sea-ice components. Each component is semi-independent and has been developed at a different institution. We study how this multi-component, multi-executable application can run effectively on distributed memory architectures. For the first time, we clearly identify five effective execution modes and develop the MPH library to support application development utilizing these modes. MPH performs component-name registration, resource allocation and initial component handshaking in a flexible way.

He, Yun; Ding, Chris

2005-03-24T23:59:59.000Z

71

A hazard separation system for dismantlement of nuclear weapon components  

SciTech Connect

Over the next decade, the US Department of Energy (DOE) must retire and dismantle many nuclear weapon systems. In support of this effort, Sandia National Laboratories (SNL) has developed the Hazard Separation System (HSS). The HSS combines abrasive waterjet cutting technology and real-time radiography. Using the HSS, operators determine the exact location of interior, hazardous sub-components and remove them through precision cutting. The system minimizes waste and maximizes the recovery of recyclable materials. During 1994, the HSS was completed and demonstrated. Weapon components processed during the demonstration period included arming, fusing, and firing units; preflight control units; neutron generator subassemblies; and x-units. Hazards removed included radioactive krytron tubes and gap tubes, thermal batteries, neutron generator tubes, and oil-filled capacitors. Currently, the HSS is being operated at SNL in a research and development mode to facilitate the transfer of the technology to other DOE facilities for support of their dismantlement operations.

Lutz, J.D.; Purvis, S.T.; Hospelhorn, R.L.; Thompson, K.R.

1995-04-01T23:59:59.000Z

72

Chemical kinetic modeling of component mixtures relevant to gasoline  

SciTech Connect

Detailed kinetic models of pyrolysis and combustion of hydrocarbon fuels are nowadays widely used in the design of internal combustion engines and these models are effectively applied to help meet the increasingly stringent environmental and energetic standards. In previous studies by the combustion community, such models not only contributed to the understanding of pure component combustion, but also provided a deeper insight into the combustion behavior of complex mixtures. One of the major challenges in this field is now the definition and the development of appropriate surrogate models able to mimic the actual features of real fuels. Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. Their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. Aside the most commonly used surrogates containing iso-octane and n-heptane only, the so called Primary Reference Fuels (PRF), new mixtures have recently been suggested to extend the reference components in surrogate mixtures to also include alkenes and aromatics. It is generally agreed that, including representative species for all the main classes of hydrocarbons which can be found in real fuels, it is possible to reproduce very effectively in a wide range of operating conditions not just the auto-ignition propensity of gasoline or Diesel fuels, but also their physical properties and their combustion residuals [1]. In this work, the combustion behavior of several components relevant to gasoline surrogate formulation is computationally examined. The attention is focused on the autoignition of iso-octane, hexene and their mixtures. Some important issues relevant to the experimental and modeling investigation of such fuels are discussed with the help of rapid compression machine data and calculations. Following the model validation, the behavior of mixtures is discussed on the basis of computational results.

Mehl, M; Curran, H J; Pitz, W J; Dooley, S; Westbrook, C K

2008-05-29T23:59:59.000Z

73

Transformer modeling in power systems  

SciTech Connect

A practical and accurate method of modeling various transformers in power systems using a general circuit model approach is described in this paper. The advantage of the new approach is that it can model transformers along with a complex circuit network, while avoiding the use of symmetrical components, unlike other approaches. The transformer modeling technique introduced in this paper is very useful to accurately determine fault current distribution in a power system and electromagnetic interference on pipelines and communication lines installed in a right-of-way consisting of transmission lines operating at different voltages.

Ma, J.; Dawalibi, F.P. [Safe Engineering Services and Technologies Ltd., Montreal, Quebec (Canada)

1999-11-01T23:59:59.000Z

74

Separation of concerns in hybrid component and agent systems  

Science Journals Connector (OSTI)

This paper discusses the Socially Situated Agent Architecture (SoSAA) a complete construction methodology that leverages existing well-established research and associated methodologies and frameworks in both the agent-oriented and component-based software engineering domains. As a software framework, SoSAA is intended to serve as a foundation on which to build agent-based applications by promoting separation of concerns in the development of open, heterogeneous, adaptive and distributed systems. The paper highlights concerns typically addressed in the development of distributed systems, such as adaptation, concurrency and fault-tolerance. It analyses how a hybrid agent/component integration approach can improve the separation of these concerns by leveraging modularity constructs already available in agent and component systems. Finally, it provides a first evaluation of the framework's application by applying well-known metrics to a distributed information retrieval case study, and by discussing how these results can be projected to a typical multi-agent application developed with this hybrid approach.

Mauro Dragone; Howell Jordan; David Lillis; Rem W. Collier

2011-01-01T23:59:59.000Z

75

Reliability and component importance analysis of substation automation systems  

Science Journals Connector (OSTI)

This paper aims to present a comprehensive technique to quantitatively assess the reliability of substation automation systems. The technique is based on the tie-sets methodology. In order to demonstrate the application of the proposed technique, a variety of substation automation architectures is first introduced. The associated reliability block diagrams as well as the exact system reliability are then given. The impacts and the degree of importance of various components on the reliability of substation automation systems are presented. Two suitable measures of importance are selected. The first is the Birnbaums measure used to determine the bottleneck of the system reliability. The second measure uses criticality importance to diagnose failures and generating repair or inspection checklists.

Hamze Hajian-Hoseinabadi

2013-01-01T23:59:59.000Z

76

Three Components Evolution in a Simple Big Bounce Cosmological Model  

E-Print Network (OSTI)

We consider a five-dimensional Ricci flat Bouncing cosmology and assume that the four-dimensional universe is permeated smoothly by three minimally coupled matter components: CDM+baryons $\\rho_{m}$, radiation $\\rho_{r}$ and dark energy $\\rho_{x}$. Evolutions of these three components are studied and it is found that dark energy dominates before the bounce, and pulls the universe contracting. In this process, dark energy decreases while radiation and the matter increase. After the bounce, the radiation and matter dominates alternatively and then decrease with the expansion of the universe. At present, the dark energy dominates again and pushes the universe accelerating. In this model, we also obtain that the equation of state (EOS) of dark energy at present time is $w_{x0}\\approx -1.05$ and the redshift of the transition from decelerated expansion to accelerated expansion is $z_{T}\\approx 0.37$, which are compatible with the current observations.

Lixin Xu; Hongya Liu

2005-07-11T23:59:59.000Z

77

Collaborative study of GENIEfy Earth System Models using scripted database workflows in a Grid  

E-Print Network (OSTI)

algorithms complement the component framework to provide a comprehensive toolset for Earth system modelling

A. R. Price; Z. Jiao; I. I. Voutchkov; T. M. Lenton; G. Williams; D. J. Lunt; R. Marsh; P. J. Valdes; S. J. Cox; The Genie Team

78

Definition, Capabilities, and Components of a Terrestrial Carbon Monitoring System  

SciTech Connect

Research efforts for effectively and consistently monitoring terrestrial carbon are increasing in number. As such, there is a need to define carbon monitoring and how it relates to carbon cycle science and carbon management. There is also a need to identify intended capabilities of a carbon monitoring system and what system components are needed to develop the capabilities. This paper is intended to promote discussion on what capabilities are needed in a carbon monitoring system based on requirements for different areas of carbon-related research and, ultimately, for carbon management. While many methods exist to quantify different components of the carbon cycle, research is needed on how these methods can be coupled or integrated to obtain carbon stock and flux estimates regularly and at a resolution that enables attribution of carbon dynamics to respective sources. As society faces sustainability and climate change conerns, carbon management activities implemented to reduce carbon emissions or increase carbon stocks will become increasingly important. Carbon management requires moderate to high resolution monitoring. Therefore, if monitoring is intended to help inform management decisions, management priorities should be considered prior to development of a monitoring system.

West, Tristram O.; Brown, Molly E.; Duran, Riley M.; Ogle, Stephen; Moss, Richard H.

2013-08-08T23:59:59.000Z

79

An advanced geothermal drilling system: Component options and limitations  

SciTech Connect

The historical developments of drilling technology for geothermal resources have followed traditional incremental trends. The local expertise and rigs were adapted from existing drill rigs used for mining, civil, and water well projects. In areas with hydrocarbon resources, petroleum drilling hardware has been adapted; and in other countries, these units were imported as depth requirements increased and more robust derricks and downhole tools were needed. This ad hoc approach has provided adequate exploration and production wells. In contrast to the incremental improvements in petroleum rotary drilling system components this paper reviews a new, purpose-developed system that would solve the known major problems by design. Performance goals of 4 km (12,000 ft.) depth, 400 C, (750 F) and penetration rates greater than 8 m/h (25 ft/h) were selected. This advanced system was reviewed extensively and estimates of perhaps 30 to 60% cost savings were projected, depending on the assumed effectiveness and performance improvements provided. This paper continues the design and feasibility study and presents some of the component and sub-system details developed thus far.

Rowley, J. [Pajarito Enterprises, Los Alamos, NM (United States); Saito, Seiji [JMC Geothermal Division, Tokyo (Japan); Long, R.C. [Department of Energy, Las Vegas, NV (United States). Yucca Mountain Site Characterization Project

1995-12-31T23:59:59.000Z

80

Vaporization modeling of petroleum-biofuel drops using a hybrid multi-component approach  

SciTech Connect

Numerical modeling of the vaporization characteristics of multi-component fuel mixtures is performed in this study. The fuel mixtures studied include those of binary components, biodiesel, diesel-biodiesel, and gasoline-ethanol. The use of biofuels has become increasingly important for reasons of environmental sustainability. Biofuels are often blended with petroleum fuels, and the detailed understanding of the vaporization process is essential to designing a clean and efficient combustion system. In this study, a hybrid vaporization model is developed that uses continuous thermodynamics to describe petroleum fuels and discrete components to represent biofuels. The model is validated using the experimental data of n-heptane, n-heptane-n-decane mixture, and biodiesel. Since biodiesel properties are not universal due to the variation in feedstock, methods for predicting biodiesel properties based on the five dominant fatty acid components are introduced. Good levels of agreement in the predicted and measured drop size histories are obtained. Furthermore, in modeling the diesel-biodiesel drop, results show that the drop lifetime increases with the biodiesel concentration in the blend. During vaporization, only the lighter components of diesel fuel vaporize at the beginning. Biodiesel components do not vaporize until some time during the vaporization process. On the other hand, results of gasoline-ethanol drops indicate that both fuels start to vaporize once the process begins. At the beginning, the lighter components of gasoline have a slightly higher vaporization rate than ethanol. After a certain time, ethanol vaporizes faster than the remaining gasoline components. At the end, the drop reduces to a regular gasoline drop with heavier components. Overall, the drop lifetime increases as the concentration of ethanol increases in the drop due to the higher latent heat. (author)

Zhang, Lei; Kong, Song-Charng [Department of Mechanical Engineering, Iowa State University, 2025 Black Engineering Building, Ames, IA 50011 (United States)

2010-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

A scalable methodology for modeling cities as systems of systems  

E-Print Network (OSTI)

As cities evolve in size and complexity, their component systems become more interconnected. Comprehensive modeling and simulation is needed to capture interactions and correctly assess the impact of changes. This thesis ...

Wachtel, Amanda M. (Amanda Marie)

2013-01-01T23:59:59.000Z

82

South Atlantic sag basins: new petroleum system components  

SciTech Connect

Newly discovered pre-salt source rocks, reservoirs and seals need to be included as components to the petroleum systems of both sides of the South Atlantic. These new components lie between the pre-salt rift strata and the Aptian salt layers, forming large, post-rift, thermal subsidence sag basins. These are differentiated from the older rift basins by the lack of syn-rift faulting and a reflector geometry that is parallel to the base salt regional unconformity rather than to the Precambrian basement. These basins are observed in deep water regions overlying areas where both the mantle and the crust have been involved in the extension. This mantle involvement creates post-rift subsiding depocenters in which deposition is continuous while proximal rift-phase troughs with little or no mantle involvement are bypassed and failed to accumulate potential source rocks during anoxic times. These features have been recognized in both West African Kwanza Basin and in the East Brasil Rift systems. The pre-salt source rocks that are in the West African sag basins were deposited in lacustrine brackish to saline water environment and are geochemically distinct from the older, syn-rift fresh to brackish water lakes, as well as from younger, post-salt marine anoxic environments of the drift phase. Geochemical analyses of the source rocks and their oils have shown a developing source rock system evolving from isolated deep rift lakes to shallow saline lakes, and culminating with the infill of the sag basin by large saline lakes to a marginally marine restricted gulf. Sag basin source rocks may be important in the South Atlantic petroleum system by charging deep-water prospects where syn-rift source rocks are overmature and the post-salt sequences are immature.

Henry, S.G. [GeoLearn, Houston, TX (United States)] Mohriak, W.U. [Petroleo Brasileiro, S.A., Exploration and Production, Rio de Janeiro (Brazil); Mello, M.R. [Petroleo Brasieiro, S.A., Research Center, Rio de Janeiro (Brazil)

1996-08-01T23:59:59.000Z

83

Plug-In Hybrid Electric Vehicles - PHEV Modeling - Component Requirement  

NLE Websites -- All DOE Office Websites (Extended Search)

Requirement Definition for PHEVs Requirement Definition for PHEVs One of the main objectives of the U.S. Department of Energy's (DOE's) Plug-in Hybrid Electric Vehicle R&D Plan (2.2Mb pdf) is to "determine component development requirements" through simulation analysis. PSAT has been used to design and evaluate a series of PHEVs to define the requirements of different components, focusing on the energy storage system's power and energy. Several vehicle classes (including midsize car, crossover SUV and midsize SUV) and All Electric Range (AER from 10 to 40 miles) were considered. The preliminary simulations were performed at Argonne using a pre-transmission parallel hybrid configuration with an energy storage system sized to run the Urban Dynanometer Driving Schedule (UDDS) in electric mode. Additional powertrain configurations and sizing algorithm are currently being considered. Trade-off studies are being performed as ways to achieve some level of performance while easing requirements on one area or another. As shown in the figure below, the FreedomCAR Energy Storage Technical Team selected a short term and a long term All Electric Range (AER) goals based on several vehicle simulations.

84

Princeton Power Systems (TRL 5 6 Component)- Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage  

Energy.gov (U.S. Department of Energy (DOE))

Princeton Power Systems (TRL 5 6 Component) - Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage

85

Development and application of earth system models  

Science Journals Connector (OSTI)

...that earth system models can...water, and waste disposal...the earth system. Such integrated assessments...simultaneous treatments of the...running control experiments...numerical control experiments...and natural system components...Text 2). Integrated Global System...averaged treatments...roles of plants; the...

Ronald G. Prinn

2013-01-01T23:59:59.000Z

86

Wetland model in an earth systems modeling framework for regional environmental policy analysis  

E-Print Network (OSTI)

The objective of this research is to investigate incorporating a wetland component into a land energy and water fluxes model, the Community Land Model (CLM). CLM is the land fluxes component of the Integrated Global Systems ...

Awadalla, Sirein Salah

2011-01-01T23:59:59.000Z

87

Local-Level Prognostics Health Management Systems Framework for Passive AdvSMR Components Interim Report  

SciTech Connect

This report describes research results to date in support of the integration and demonstration of diagnostics technologies for prototypical AdvSMR passive components (to establish condition indices for monitoring) with model-based prognostics methods. The focus of the PHM methodology and algorithm development in this study is at the localized scale. Multiple localized measurements of material condition (using advanced nondestructive measurement methods), along with available measurements of the stressor environment, enhance the performance of localized diagnostics and prognostics of passive AdvSMR components and systems.

Ramuhalli, Pradeep; Roy, Surajit; Hirt, Evelyn H.; Pardini, Allan F.; Jones, Anthony M.; Deibler, John E.; Pitman, Stan G.; Tucker, Joseph C.; Prowant, Matthew S.; Suter, Jonathan D.

2014-09-12T23:59:59.000Z

88

DIFFUSION COATINGS FOR CORROSION RESISTANT COMPONENTS IN COAL GASIFICATION SYSTEMS  

SciTech Connect

Advanced electric power generation systems use a coal gasifier to convert coal to a gas rich in fuels such as H{sub 2} and CO. The gas stream contains impurities such as H{sub 2}S and HCl, which attack metal components of the coal gas train, causing plant downtime and increasing the cost of power generation. Corrosion-resistant coatings would improve plant availability and decrease maintenance costs, thus allowing the environmentally superior integrated gasification combined cycle plants to be more competitive with standard power-generation technologies. A startup meeting was held at the National Energy Technology Center, Pittsburgh, PA site on July 28, 2003. SRI staff described the technical approach of the project.

Gopala N. Krishnan

2004-05-01T23:59:59.000Z

89

Performance categorization of structures, systems & components and related issues  

SciTech Connect

Provisions of DOE-STD-1021-93 on performance categorization of structures, systems and components (SSCs) subjected to natural phenomena hazards (NPHs) are summarized. The interrelationship among safety classification of SSCs (per DOE 6430.1A and DOE 5480.30), facility hazard categorization/classification (per DOE 5481.1B and DOE 5480.23), and NPH performance categorization of SSCs (per DOE 5480.28 and DOE-STD-1021-93) is discussed. The compatibility between the safety goals in the Department of Energy Safety Policy, SEN-35-91, and the numerical NPH performance goals of DOE 5480.28, as presented in UCRL-ID-12612 (draft), is examined.

Hossain, Q.A.

1993-09-30T23:59:59.000Z

90

SunShot Initiative: Component R&D for CSP Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Component R&D for CSP Systems to Component R&D for CSP Systems to someone by E-mail Share SunShot Initiative: Component R&D for CSP Systems on Facebook Tweet about SunShot Initiative: Component R&D for CSP Systems on Twitter Bookmark SunShot Initiative: Component R&D for CSP Systems on Google Bookmark SunShot Initiative: Component R&D for CSP Systems on Delicious Rank SunShot Initiative: Component R&D for CSP Systems on Digg Find More places to share SunShot Initiative: Component R&D for CSP Systems on AddThis.com... Concentrating Solar Power Systems Components Collectors Receivers Power Block Thermal Storage Systems Analysis Competitive Awards Staff Photovoltaics Systems Integration Balance of Systems Component R&D for CSP Systems Graphic showing five color blocks in a circular formation that represent the technical goals and cost targets for each component in the CSP system.

91

Powder Metal Performance Modeling of Automotive Components ?AMD...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Automotive Components: Manufacturing Process Feasibility StudyAMD 310 Structural Cast Magnesium Development (SCMD) AMD 111 Magnesium Front End Design And Development (AMD603)...

92

Space Power System Modeling with EBAL  

SciTech Connect

Pratt and Whitney Rocket dyne's Engine Balance (EBAL) thermal/fluid system code has been expanded to model nuclear power closed Brayton cycle (CBC) power conversion systems. EBAL was originally developed to perform design analysis of hypersonic vehicle propellant and thermal management systems analysis. Later, it was adapted to rocket engine cycles. The new version of EBAL includes detailed, physics-based models of all key CBC system components. Some component examples are turbo-alternators, heat exchangers, heat pipe radiators, and liquid metal pumps. A liquid metal cooled reactor is included and a gas cooled reactor model is in work. Both thermodynamic and structural analyses are performed for each component. EBAL performs steady-state design analysis with optimization as well as off-design performance analysis. Design optimization is performed both at the component level by the component models and on the system level with a global optimizer. The user has the option to manually drive the optimization process or run parametric analysis to better understand system trade-off. Although recent EBAL developments have focused on a CBC conversion system, the code is easily extendible to other power conversion cycles. This new, more powerful version of EBAL allows for rapid design analysis and optimization of space power systems. A notional example of EBAL's capabilities is included. (authors)

Zillmer, Andrew; Hanks, David; Wen-Hsiung 'Tony' Tu [Pratt and Whitney Rocketdyne, 6633 Canoga Avenue MC LA 13, PO Box 7922, Canoga Park, CA 91309 (United States)

2006-07-01T23:59:59.000Z

93

Petri-Net Simulation Model of a Nuclear Component Degradation Process , E. Zioa,b  

E-Print Network (OSTI)

1 Petri-Net Simulation Model of a Nuclear Component Degradation Process Y.F. Lia* , E. Zioa,b , Y models [2-5] and simulation models [1, 6, 7]. The analytical degradation models can be further classified

Paris-Sud XI, Université de

94

Cognitive Systems Cognitive Modeling  

E-Print Network (OSTI)

1 Cognitive Systems Cognitive Modeling Foundations of Information Processing in Natural Barkowsky, Christian Freksa 2 Cognitive Systems: Topics · Introduction · Perception · Memory and Reasoning · Learning and Action · Communication · Empirical Methods 3 Cognitive Modeling: Topics · Cognitive

Bremen, Universität

95

Modeling Water Resource Systems under Climate Change: IGSM-WRS  

E-Print Network (OSTI)

Through the integration of a Water Resource System (WRS) component, the MIT Integrated Global System Model (IGSM) framework has been enhanced to study the effects of climate change on managed water-resource systems. ...

Strzepek, K.

96

Physics-Based Multi-State Models of Passive Component Degradation for the R7 Reactor Simulation Environment  

SciTech Connect

Abstract: The Next Generation Systems Analysis Code - referred to as R7 - is reactor systems simulation software being developed to support the Risk-Informed Safety Margin Characterization Pathway of the U.S. Department of Energy's Light Water Reactor Sustainability Program. It will provide an integrated multi-physics environment, implemented in an uncertainty quantification (UQ) framework that can produce risk and other performance insights on long-term reactor operations. An element of this simulation environment will be the performance of passive components and materials. Conventional models of component reliability are largely parametric, relying on plant service data to estimate component lifetimes and failure rates. This type of model has limited usefulness in the R7 environment where the intent is to explicitly determine the influence of physical stressors on component degradation. In this paper, we describe a new class of multi-state physics-based component models designed to be R7-compatible. These models capture the physics of materials degradation while also incorporating the effects of interventions and component rejuvenation. The models are implemented in a cumulative damage framework that allows the impact of an evolving physical environment to be addressed without recourse to resampling within the Monte Carlo-based UQ framework. The paper describes an application to stress corrosion cracking in dissimilar metal welds - a principal contributor to potential loss of coolant accidents. So while R7 will have the more conventional capability of reactor simulation codes to model the impact of degraded components and systems on plant performance, the methodology described here allows R7 to model the inverse effect; the impact of the physical environment on component degradation and performance.

Unwin, Stephen D.; Layton, Robert F.; Johnson, Kenneth I.; Lowry, Peter P.

2012-06-25T23:59:59.000Z

97

Fermionic construction of partition function for multi-matrix models and multi-component TL hierarchy  

E-Print Network (OSTI)

We use $p$-component fermions $(p=2,3,...)$ to present $(2p-2)N$-fold integrals as a fermionic expectation value. This yields fermionic representation for various $(2p-2)$-matrix models. Links with the $p$-component KP hierarchy and also with the $p$-component TL hierarchy are discussed. We show that the set of all (but two) flows of $p$-component TL changes standard matrix models to new ones.

John Harnad; Alexander Yu. Orlov

2007-04-09T23:59:59.000Z

98

Comparison of Photovoltaic Models in the System Advisor Model: Preprint  

SciTech Connect

The System Advisor Model (SAM) is free software developed by the National Renewable Energy Laboratory (NREL) for predicting the performance of renewable energy systems and analyzing the financial feasibility of residential, commercial, and utility-scale grid-connected projects. SAM offers several options for predicting the performance of photovoltaic (PV) systems. The model requires that the analyst choose from three PV system models, and depending on that choice, possibly choose from three module and two inverter component models. To obtain meaningful results from SAM, the analyst must be aware of the differences between the model options and their applicability to different modeling scenarios. This paper presents an overview the different PV model options and presents a comparison of results for a 200-kW system using different model options.

Blair, N. J.; Dobos, A. P.; Gilman, P.

2013-08-01T23:59:59.000Z

99

Non-standard semantics of hybrid systems modelers  

Science Journals Connector (OSTI)

Hybrid system modelers have become a corner stone of complex embedded system development. Embedded systems include not only control components and software, but also physical devices. In this area, Simulink is a de facto standard design framework, and ... Keywords: Compilation of hybrid systems, Constructive semantics, Hybrid systems, Hybrid systems modelers, Kahn process networks, Non-standard analysis, Non-standard semantics

Albert Benveniste; Timothy Bourke; Benot Caillaud; Marc Pouzet

2012-05-01T23:59:59.000Z

100

Thermal Systems Process and Components Laboratory (Fact Sheet), NREL (National Renewable Energy Laboratory), Energy Systems Integration Facility (ESIF)  

NLE Websites -- All DOE Office Websites (Extended Search)

Systems Process and Systems Process and Components Laboratory may include: * CSP technology developers * Utilities * Certification laboratories * Government agencies * Universities * Other National laboratories Contact Us If you are interested in working with NREL's Thermal Systems Process and Components Laboratory, please contact: ESIF Manager Carolyn Elam Carolyn.Elam@nrel.gov 303-275-4311 Thermal Systems Process and Components Laboratory The focus of the Thermal Systems Process and Components Laboratory at NREL's Energy Systems Integration Facility (ESIF) is to research, develop, test, and evaluate new techniques for thermal energy storage systems that are relevant to utility-scale concentrating solar power plants. The laboratory holds

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

A Model for Recording Early-Stage Proposals and Decisions on Using COTS Components in Architecture  

Science Journals Connector (OSTI)

Large networked systems can include the whole technological spectrum of embedded systems from deeply embedded applicationspecific systems to software intensive applications including COTS component intensive subsystems. Significant up-front and early-stage ...

Tuomas Ihme

2003-02-01T23:59:59.000Z

102

Model-checking Distributed Components: The Vercors Platform  

E-Print Network (OSTI)

software. Through the reuse of software, designers are able to speed up their development process and avoid team OSCAR funded by INRIA and University of Chile. This paper is electronically published signatures) of each component through its interfaces, it is well-known that static typing of bound interfaces

Paris-Sud XI, Université de

103

ForReviewers Integrating Theoretical Components: A Graphical Model for  

E-Print Network (OSTI)

formulating a hypothesis, four avenues of194 integration (Integration Routes � IR, dashed lines in Figure 1 to form a new hypothesis on the effects of predation risk on200 disease transmission of the host while foraging.221 We do not include integration routes between identical components (e.g., laws

Prather, Chelse M.

104

Differential phase contrast X-ray imaging system and components  

DOE Patents (OSTI)

A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in an optical path of the X-ray illumination system, and a detection system arranged in an optical path to detect X-rays after passing through the beam splitter.

Stutman, Daniel; Finkenthal, Michael

2014-07-01T23:59:59.000Z

105

Extraction of Vibration Components from a Rotating Propeller Model Based on Complex Empirical Mode Decomposition  

E-Print Network (OSTI)

Extraction of Vibration Components from a Rotating Propeller Model Based on Complex Empirical Mode dydynoel@kaist.ac.kr Abstract -- In this paper, we present extraction of vibration components embedded decomposition (CEMD), an extended version of EMD, is employed to extract the vibration components. With FEKO

Myung, Noh-Hoon

106

In-situ parameter estimation for solar domestic hot water heating systems components. Final report, June 1995--May 1996  

SciTech Connect

Three different solar domestic hot water systems are being tested at the Colorado State University Solar Energy Applications Laboratory; an unpressurized drain-back system with a load side heat exchanger, an integral collector storage system, and an ultra low flow natural convection heat exchanger system. The systems are fully instrumented to yield data appropriate for in-depth analyses of performance. The level of detail allows the observation of the performance of the total system and the performance of the individual components. This report evaluates the systems based on in-situ experimental data and compares the performances with simulated performances. The verification of the simulations aids in the rating procedure. The whole system performance measurements are also used to analyze the performance of individual components of a solar hot water system and to develop improved component models. The data are analyzed extensively and the parameters needed to characterize the systems fully are developed. Also resulting from this indepth analysis are suggested design improvements wither to the systems or the system components.

Smith, T.R.

1997-03-01T23:59:59.000Z

107

U.S. Department of Energy Hydrogen Component and System Qualification Workshop- Presentations  

Energy.gov (U.S. Department of Energy (DOE))

These presentations were given at the U.S. Department of Energy Hydrogen Component and System Qualification Workshop held November 4, 2010 in Livermore, CA.

108

Effectiveness of advanced coating systems for mitigating blast effects on steel components  

E-Print Network (OSTI)

Effectiveness of advanced coating systems for mitigating blast effects on steel components C. Chen1 tool for steel components. The response of polyurea coated steel components under blast loading of polyurea onto armor grade steel plates and an examination of resulting failure modes and governing design

109

Improving efficiency of a vehicle HVAC system with comfort modeling, zonal design, and thermoelectric devices  

Energy.gov (U.S. Department of Energy (DOE))

Discusses progress on thermal comfort modeling and detailed design, fabrication, and component/system-level testing of TE architecture

110

Hybrid Energy System Modeling in Modelica  

SciTech Connect

In this paper, a Hybrid Energy System (HES) configuration is modeled in Modelica. Hybrid Energy Systems (HES) have as their defining characteristic the use of one or more energy inputs, combined with the potential for multiple energy outputs. Compared to traditional energy systems, HES provide additional operational flexibility so that high variability in both energy production and consumption levels can be absorbed more effectively. This is particularly important when including renewable energy sources, whose output levels are inherently variable, determined by nature. The specific HES configuration modeled in this paper include two energy inputs: a nuclear plant, and a series of wind turbines. In addition, the system produces two energy outputs: electricity and synthetic fuel. The models are verified through simulations of the individual components, and the system as a whole. The simulations are performed for a range of component sizes, operating conditions, and control schemes.

William R. Binder; Christiaan J. J. Paredis; Humberto E. Garcia

2014-03-01T23:59:59.000Z

111

Selected components of an oil spill contingency plan model  

E-Print Network (OSTI)

as utilization of scientific and engineering information or resources are two major components which deserve particular emphasis. Oil spill contingency plans must supply a balance between the administrative aspects and the activities occurring in the field... of political strength and/or have state resources they can commit to back them up. If the State must assume supervision of oil removal operations, the TDWR may request reimbursement through the EPA or USCG for reasonable costs incurred. Additional non...

Starnater, Carol Elizabeth

2012-06-07T23:59:59.000Z

112

Systems Modeling | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Computational Physics Communication Networks and Technologies Modeling and Simulation Innovative Signal Processing Algorithms Advanced Control Systems Econometrics Engineering Analysis Behavioral Sciences Geographic Information Science and Technology Quantum Information Science Supercomputing and Computation Home | Science & Discovery | Supercomputing and Computation | Research Areas | Systems Modeling SHARE Systems Modeling System modeling is the interdisciplinary study of the use of models to conceptualize and construct systems. A common type of systems modeling is function modeling, with specific techniques such as the functional flow block diagram. These models can be extended using functional decomposition, and can be linked to requirements models for further systems

113

Modeling the earth system  

SciTech Connect

The 1990 Global Change Institute (GCI) on Earth System Modeling is the third of a series organized by the Office for Interdisciplinary Earth Studies to look in depth at particular issues critical to developing a better understanding of the earth system. The 1990 GCI on Earth System Modeling was organized around three themes: defining critical gaps in the knowledge of the earth system, developing simplified working models, and validating comprehensive system models. This book is divided into three sections that reflect these themes. Each section begins with a set of background papers offering a brief tutorial on the subject, followed by working group reports developed during the institute. These reports summarize the joint ideas and recommendations of the participants and bring to bear the interdisciplinary perspective that imbued the institute. Since the conclusion of the 1990 Global Change Institute, research programs, nationally and internationally, have moved forward to implement a number of the recommendations made at the institute, and many of the participants have maintained collegial interactions to develop research projects addressing the needs identified during the two weeks in Snowmass.

Ojima, D. [ed.

1992-12-31T23:59:59.000Z

114

Evolution and phyletic distribution of two-component signal transduction systems  

NLE Websites -- All DOE Office Websites (Extended Search)

733; 733; NO OF PAGES 7 Please cite this article in press as: Wuichet K, et al. Evolution and phyletic distribution of two-component signal transduction systems, Curr Opin Microbiol (2010), doi:10.1016/j.mib.2009.12.011 Available online at www.sciencedirect.com Evolution and phyletic distribution of two-component signal transduction systems Kristin Wuichet 1 , Brian J Cantwell 1 and Igor B Zhulin 1,2 Two-component signal transduction systems are abundant in prokaryotes. They enable cells to adjust multiple cellular functions in response to changing environmental conditions. These systems are also found, although in much smaller numbers, in lower eukaryotes and plants, where they appear to control a few very specific functions. Two-component systems have evolved in Bacteria from much simpler one-component systems bringing about the benefit of extracellular versus

115

Component-based Face Recognition with 3D Morphable Models B. Weyrauch  

E-Print Network (OSTI)

@mpi-sb.mpg.de Honda Research Institute USA, Inc. Max-Planck-Institute for Computer Science Boston, MA Saarbr. In this paper, we combine morphable models and component-based recognition. The morphable model is em- ployed

Poggio, Tomaso

116

Mathematical equations as executable models of mechanical systems  

Science Journals Connector (OSTI)

Cyber-physical systems comprise digital components that directly interact with a physical environment. Specifying the behavior desired of such systems requires analytical modeling of physical phenomena. Similarly, testing them requires simulation ...

Yun Zhu; Edwin Westbrook; Jun Inoue; Alexandre Chapoutot; Cherif Salama; Marisa Peralta; Travis Martin; Walid Taha; Marcia O'Malley; Robert Cartwright; Aaron Ames; Raktim Bhattacharya

2010-04-01T23:59:59.000Z

117

A component infrastructure for performance and power modeling of parallel scientific applications  

Science Journals Connector (OSTI)

Characterizing the performance of scientific applications is essential for effective code optimization, both by compilers and by high-level adaptive numerical algorithms. While maximizing power efficiency is becoming increasingly important in current ... Keywords: CCA, common component architecture, components, performance modeling, power modeling

Van Bui; Boyana Norris; Kevin Huck; Lois Curfman McInnes; Li Li; Oscar Hernandez; Barbara Chapman

2008-10-01T23:59:59.000Z

118

A component-based debugging approach for detecting structural inconsistencies in declarative equation based models  

Science Journals Connector (OSTI)

Object-oriented modeling with declarative equation based languages often unconsciously leads to structural inconsistencies. Component-based debugging is a new structural analysis approach that addresses this problem by analyzing the structure of each ... Keywords: component-based debugging, declarative model, modelica, simulation, structural inconsistency

Jian-Wan Ding; Li-Ping Chen; Fan-Li Zhou

2006-05-01T23:59:59.000Z

119

On the Inner Structure and Topology of Clusters in Two-Component Lipid Bilayers. Comparison of Monomer and Dimer Ising Models  

Science Journals Connector (OSTI)

Comparison of Monomer and Dimer Ising Models ... Clusters of two-component phospholipid bilayers have been simulated by two Ising-type lattice models: the monomer and the dimer model. ... The first theoretical model of a collective system, the model of ferromagnets, was developed by Ernst Ising(17) in 1925. ...

Istvn P. Sugr

2008-08-26T23:59:59.000Z

120

Maintaining consistency between system architecture and dynamic system models with SysML4Modelica  

Science Journals Connector (OSTI)

Nowadays many technical products include mechatronic systems that incorporate components from multiple disciplines --- mechanical, electronic, controls and software. In model-based design of mechatronic systems different kinds of models are used to model ... Keywords: SysML, mechatronic systems, model-based design, modelica

Axel Reichwein; Christiaan J. J. Paredis; Arquimedes Canedo; Petra Witschel; Philipp Emanuel Stelzig; Anjelika Votintseva; Rainer Wasgint

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

A model of multimedia components interconnection with support to communication mechanisms dynamic selection and reconfiguration  

Science Journals Connector (OSTI)

Distributed multimedia systems must provide support for interaction between its components, and this can be done by using different strategies and mechanisms of communication. A possible way to define efficient communication mechanisms is to consider ... Keywords: adaptation, communication, components, distributed multimedia systems, protocol of communication

Felipe A. P. Pinto; Adilson Barboza Lopes; Andr G. P. Silva; Daniel Cunha da Silva

2009-10-01T23:59:59.000Z

122

Calculating a checksum with inactive networking components in a computing system  

DOE Patents (OSTI)

Calculating a checksum utilizing inactive networking components in a computing system, including: identifying, by a checksum distribution manager, an inactive networking component, wherein the inactive networking component includes a checksum calculation engine for computing a checksum; sending, to the inactive networking component by the checksum distribution manager, metadata describing a block of data to be transmitted by an active networking component; calculating, by the inactive networking component, a checksum for the block of data; transmitting, to the checksum distribution manager from the inactive networking component, the checksum for the block of data; and sending, by the active networking component, a data communications message that includes the block of data and the checksum for the block of data.

Aho, Michael E; Chen, Dong; Eisley, Noel A; Gooding, Thomas M; Heidelberger, Philip; Tauferner, Andrew T

2014-12-16T23:59:59.000Z

123

SunShot Initiative: Component R&D for CSP Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Component R&D for CSP Systems Component R&D for CSP Systems Graphic showing five color blocks in a circular formation that represent the technical goals and cost targets for each component in the CSP system. Enlarge image The SunShot Initiative goal is to reduce the levelized cost of electricity generated by concentrating solar power (CSP) to $0.06 per kilowatt hour (kWh) or less, without any subsidy, by the year 2020. Concentrating solar power systems have different system configurations, such as trough, tower, linear Fresnel or dish, but they all share similar components. The SunShot CSP program funds research and development within the industry, national laboratories and universities to achieve the technical and economic targets for the following CSP component technologies:

124

Emission Control Systems and Components for Retrofit and First...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of Advanced Emission Controls for the Retrofit Market Development of a Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines HD Truck and Engine Fuel Efficiency...

125

Testing Components of New Community Isopycnal Ocean Circulation Model  

SciTech Connect

The ocean and atmosphere are both governed by the same physical laws and models of the two media have many similarities. However, there are critical differences that call for special methods to provide the best simulation. One of the most important difference is that the ocean is nearly opaque to radiation in the visible and infra-red part of the spectrum. For this reason water mass properties in the ocean are conserved along trajectories for long distances and for long periods of time. For this reason isopycnal coordinate models would seem to have a distinct advantage in simulating ocean circulation. In such a model the coordinate surfaces are aligned with the natural paths of near adiabatic, density conserving flow in the main thermocline. The difficulty with this approach is at the upper and lower boundaries of the ocean, which in general do not coincide with density surfaces. For this reason hybrid coordinate models were proposed by Bleck and Boudra (1981) in which Cartesian coordinates were used near the ocean surface and isopycnal coordinates were used in the main thermocline. This feature is now part of the HICOM model (Bleck, 2002).

Bryan, Kirk

2008-05-09T23:59:59.000Z

126

MATERIALS AND COMPONENT DEVELOPMENT FOR ADVANCED TURBINE SYSTEMS  

SciTech Connect

Future hydrogen-fired or oxy-fuel turbines will likely experience an enormous level of thermal and mechanical loading, as turbine inlet temperatures (TIT) approach 1425-1760C with pressures of 300-625 psig, respectively. Maintaining the structural integrity of future turbine components under these extreme conditions will require durable thermal barrier coatings (TBCs), high temperature creep resistant metal substrates, and effective cooling techniques. While advances in substrate materials have been limited for the past decades, thermal protection of turbine airfoils in future hydrogen-fired and oxy-fuel turbines will rely primarily on collective advances in TBCs and aerothermal cooling. To support the advanced turbine technology development, the National Energy Technology Laboratory (NETL) at the Office of Research and Development (ORD) has initiated a research project effort in collaboration with the University of Pittsburgh (UPitt), and West Virginia University (WVU), working in conjunction with commercial material and coating suppliers, to develop advanced materials, aerothermal configurations, as well as non-destructive evaluation techniques for use in advanced land-based gas turbine applications. This paper reviews technical accomplishments recently achieved in each of these areas.

M. A. Alvin

2009-06-12T23:59:59.000Z

127

Methods of producing epoxides from alkenes using a two-component catalyst system  

DOE Patents (OSTI)

Methods for the epoxidation of alkenes are provided. The methods include the steps of exposing the alkene to a two-component catalyst system in an aqueous solution in the presence of carbon monoxide and molecular oxygen under conditions in which the alkene is epoxidized. The two-component catalyst system comprises a first catalyst that generates peroxides or peroxy intermediates during oxidation of CO with molecular oxygen and a second catalyst that catalyzes the epoxidation of the alkene using the peroxides or peroxy intermediates. A catalyst system composed of particles of suspended gold and titanium silicalite is one example of a suitable two-component catalyst system.

Kung, Mayfair C.; Kung, Harold H.; Jiang, Jian

2013-07-09T23:59:59.000Z

128

An Aerospace Component Cost Modelling Study for Value Driven Design  

E-Print Network (OSTI)

of the research project is to understand, develop and implement a strategy to allow future generations of gas to develop cost modelling tools and techniques that can be adopted during the engine design phases turbines to be designed to meet not only performance and cost targets but to also take into account other

129

Automated Distributed Implementation of Component-based Models with Priorities  

E-Print Network (OSTI)

School of Computer Science University of Waterloo 200 University Avenue West Waterloo, Canada, N2L3G1.4 [Computer-Communication Networks]: Distributed Systems[Distributed applications] ; D.1.3 [Programming the European Community's Seventh Framework Pro- gramme [FP7/2007-2013] under grant agreement no 248776 (PRO3D

Paris-Sud XI, Université de

130

High gliding fluid power generation system with fluid component separation and multiple condensers  

DOE Patents (OSTI)

An example power generation system includes a vapor generator, a turbine, a separator and a pump. In the separator, the multiple components of the working fluid are separated from each other and sent to separate condensers. Each of the separate condensers is configured for condensing a single component of the working fluid. Once each of the components condense back into a liquid form they are recombined and exhausted to a pump that in turn drives the working fluid back to the vapor generator.

Mahmoud, Ahmad M; Lee, Jaeseon; Radcliff, Thomas D

2014-10-14T23:59:59.000Z

131

Materials and Component Development for Advanced Turbine Systems  

SciTech Connect

In order to meet the 2010-2020 DOE Fossil Energy goals for Advanced Power Systems, future oxy-fuel and hydrogen-fired turbines will need to be operated at higher temperatures for extended periods of time, in environments that contain substantially higher moisture concentrations in comparison to current commercial natural gas-fired turbines. Development of modified or advanced material systems, combined with aerothermal concepts are currently being addressed in order to achieve successful operation of these land-based engines. To support the advanced turbine technology development, the National Energy Technology Laboratory (NETL) has initiated a research program effort in collaboration with the University of Pittsburgh (UPitt), and West Virginia University (WVU), working in conjunction with commercial material and coating suppliers as Howmet International and Coatings for Industry (CFI), and test facilities as Westinghouse Plasma Corporation (WPC) and Praxair, to develop advanced material and aerothermal technologies for use in future oxy-fuel and hydrogen-fired turbine applications. Our program efforts and recent results are presented.

Alvin, M.A.; Pettit, F.; Meier, G.; Yanar, N.; Chyu, M.; Mazzotta, D.; Slaughter, W.; Karaivanov, V.; Kang, B.; Feng, C.; Chen, R.; Fu, T-C.

2008-10-01T23:59:59.000Z

132

The National Energy Modeling System: An overview  

SciTech Connect

The National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of US energy markets for the midterm period of 1990 to 2010. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. This report presents an overview of the structure and methodology of NEMS and each of its components. The first chapter provides a description of the design and objectives of the system. The second chapter describes the modeling structure. The remainder of the report summarizes the methodology and scope of the component modules of NEMS. The model descriptions are intended for readers familiar with terminology from economics, operations research, and energy modeling. Additional background on the development of the system is provided in Appendix A of this report, which describes the EIA modeling systems that preceded NEMS. More detailed model documentation reports for all the NEMS modules are also available from EIA.

Not Available

1994-05-01T23:59:59.000Z

133

Lower-Energy Energy Storage System (LEESS) Component Evaluation  

SciTech Connect

Alternate hybrid electric vehicle (HEV) energy storage systems (ESS) such as lithium-ion capacitors (LICs) and electrochemical double-layer capacitor (EDLC) modules have the potential for improved life, superior cold temperature performance, and lower long-term cost projections relative to traditional battery storage systems. If such lower-energy ESS (LEESS) devices can also be shown to maintain high HEV fuel savings, future HEVs designed with these devices could have an increased value proposition relative to conventional vehicles. NREL's vehicle test platform is helping validate the in-vehicle performance capability of alternative LEESS devices and identify unforeseen issues. NREL created the Ford Fusion Hybrid test platform for in-vehicle evaluation of such alternative LEESS devices, bench testing of the initial LIC pack, integration and testing of the LIC pack in the test vehicle, and bench testing and installation of an EDLC module pack. EDLC pack testing will continue in FY15. The in-vehicle LIC testing results suggest technical viability of LEESS devices to support HEV operation. Several LIC configurations tested demonstrated equivalent fuel economy and acceleration performance as the production nickel-metal-hydride ESS configuration across all tests conducted. The lowest energy LIC scenario demonstrated equivalent performance over several tests, although slightly higher fuel consumption on the US06 cycle and slightly slower acceleration performance. More extensive vehicle-level calibration may be able to reduce or eliminate these performance differences. The overall results indicate that as long as critical attributes such as engine start under worst case conditions can be retained, considerable ESS downsizing may minimally impact HEV fuel savings.

Gonder, J.; Cosgrove, J.; Shi, Y.; Saxon, A.; Pesaran, A.

2014-10-01T23:59:59.000Z

134

MODELING OF DAMAGE AND LIFETIME ANALYSIS OF PLASMA FACING COMPONENTS DURING PLASMA INSTABILITIES IN TOKAMAKS  

E-Print Network (OSTI)

MODELING OF DAMAGE AND LIFETIME ANALYSIS OF PLASMA FACING COMPONENTS DURING PLASMA INSTABILITIES reliability and characterize the performance of this key component. A novel particle-in-cell (PIC) technique) as consequence of plasma instabilities in tokamak reactors still represents the biggest obstacle

Harilal, S. S.

135

Bayesian Modeling of Time Trends in Component Reliability Data via Markov Chain Monte Carlo Simulation  

SciTech Connect

Markov chain Monte Carlo (MCMC) techniques represent an extremely flexible and powerful approach to Bayesian modeling. This work illustrates the application of such techniques to time-dependent reliability of components with repair. The WinBUGS package is used to illustrate, via examples, how Bayesian techniques can be used for parametric statistical modeling of time-dependent component reliability. Additionally, the crucial, but often overlooked subject of model validation is discussed, and summary statistics for judging the models ability to replicate the observed data are developed, based on the posterior predictive distribution for the parameters of interest.

D. L. Kelly

2007-06-01T23:59:59.000Z

136

H2A Delivery Components Model and Analysis | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

H2A Delivery Components Model and Analysis for the DOE Hydrogen Delivery High-Pressure Tanks and Analysis Project Review Meeting held February 8-9, 2005 at Argonne National...

137

Component-based Modeling of Complete Buildings Luc Leblanc Jocelyn Houle Pierre Poulin  

E-Print Network (OSTI)

Component-based Modeling of Complete Buildings Luc Leblanc Jocelyn Houle Pierre Poulin LIGUM, Dept Graphics [I.3.5]: Computational Geom- etry and Object Modeling 1 INTRODUCTION Buildings host a great deal the buildings of a city, quickly becomes a daunting endeavor. Procedural modeling is an excellent method

Montréal, Université de

138

Survey for Safety Software Used in Design of Structures, Systems, and Components  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Design Software Survey September 2003 1 Design Software Survey September 2003 1 Survey of Safety Software Used in Design of Structures, Systems, and Components 1. Introduction The Department's Implementation Plan for Software Quality Assurance (SQA) that was developed in response to Defense Nuclear Facilities Safety Board Recommendation 2002-01, Quality Assurance for Safety-Related Software, includes a commitment (4.2.1.5) to conduct a survey of design codes currently in use to determine if any should be included as part of the toolbox codes. The toolbox codes are a small number of standard computer models (codes) supporting DOE safety analysis that have widespread use and appropriate qualification. Generally, the toolbox codes will have been developed and maintained within the DOE complex. However, the toolbox may also include

139

Prognostic Health Monitoring System: Component Selection Based on Risk Criteria and Economic Benefit Assessment  

SciTech Connect

Prognostic health monitoring (PHM) is a proactive approach to monitor the ability of structures, systems, and components (SSCs) to withstand structural, thermal, and chemical loadings over the SSCs planned service lifespans. The current efforts to extend the operational license lifetime of the aging fleet of U.S. nuclear power plants from 40 to 60 years and beyond can benefit from a systematic application of PHM technology. Implementing a PHM system would strengthen the safety of nuclear power plants, reduce plant outage time, and reduce operation and maintenance costs. However, a nuclear power plant has thousands of SSCs, so implementing a PHM system that covers all SSCs requires careful planning and prioritization. This paper therefore focuses on a component selection that is based on the analysis of a component's failure probability, risk, and cost. Ultimately, the decision on component selection depend on the overall economical benefits arising from safety and operational considerations associated with implementing the PHM system.

Binh T. Pham; Vivek Agarwal; Nancy J Lybeck; Magdy S Tawfik

2012-05-01T23:59:59.000Z

140

Chloroplast two-component systems: evolution of the link between photosynthesis and gene expression  

Science Journals Connector (OSTI)

...distributed under the terms of the Creative Commons...Two-component systems enter the eukaryotic domain...sequence-similarity searches. Along these lines...Sequence-similarity searches reveal homologues of...subunits. In regulatory terms, this means that the...

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

The Architecture of the Earth System Modeling Framework  

Science Journals Connector (OSTI)

The Earth System Modeling Framework (ESMF) project is developing a standard software platform for Earth system models. The standard which defines a component architecture and a support infrastructure is being developed under open-software practices. Target applications range from operational numerical weather prediction to climate-system change and predictability studies.

Chris Hill; Cecelia DeLuca; Balaji; Max Suarez; Arlindo da Silva

2004-01-01T23:59:59.000Z

142

Multi-State Physics Models of Aging Passive Components in Probabilistic Risk Assessment  

SciTech Connect

Multi-state Markov modeling has proved to be a promising approach to estimating the reliability of passive components - particularly metallic pipe components - in the context of probabilistic risk assessment (PRA). These models consider the progressive degradation of a component through a series of observable discrete states, such as detectable flaw, leak and rupture. Service data then generally provides the basis for estimating the state transition rates. Research in materials science is producing a growing understanding of the physical phenomena that govern the aging degradation of passive pipe components. As a result, there is an emerging opportunity to incorporate these insights into PRA. This paper describes research conducted under the Risk-Informed Safety Margin Characterization Pathway of the Department of Energys Light Water Reactor Sustainability Program. A state transition model is described that addresses aging behavior associated with stress corrosion cracking in ASME Class 1 dissimilar metal welds a component type relevant to LOCA analysis. The state transition rate estimates are based on physics models of weld degradation rather than service data. The resultant model is found to be non-Markov in that the transition rates are time-inhomogeneous and stochastic. Numerical solutions to the model provide insight into the effect of aging on component reliability.

Unwin, Stephen D.; Lowry, Peter P.; Layton, Robert F.; Heasler, Patrick G.; Toloczko, Mychailo B.

2011-03-13T23:59:59.000Z

143

Systems for home automation are a necessary component for intelligent smart homes applications.  

E-Print Network (OSTI)

Abstract Systems for home automation are a necessary component for intelligent smart homes to provide semantically rich unification over a range of home- and web-based automation systems. 1. Introduction Whilst a number of automation systems for smart homes are available commercially, their use

Dobson, Simon

144

Chapter 1: Operating System Models 1 Operating System Models  

E-Print Network (OSTI)

Chapter 1: Operating System Models 1 2 Operating System Models 2.1 Introduction Over the past several years, a number of trends affecting operating system design are witnessed and foremost among them is a move towards modularity. Operating systems such as Microsofts Windows, IBMs OS/2, C-DACs PARAS

Melbourne, University of

145

Task 39 Exhibition Assembly of Polymeric Components for a New Generation of Solar Thermal Energy Systems  

Science Journals Connector (OSTI)

Abstract IEA SHC Task 39 is dedicated to the development, optimization and deployment of materials and designs for polymer based solar thermal systems and components. To increase the confidence in polymeric solar thermal applications, Task 39 actively supports international research activities and seeks to promote successful applications and state-of-the-art products. For the SHC conference 2013, different polymeric components suitable for domestic hot water preparation and space heating were singled out for an exhibition. Promising polymeric collectors, air collectors, thermosiphons, storage tanks and other components from industrial partners all over the world were brought to Freiburg and assembled at the Fraunhofer-Institute for Solar Energy Systems ISE. The resulting SHC Task 39 Exhibition of polymeric components shows the feasibility of all-polymeric solar thermal systems and highlights their potential, especially as scalable and modular applications for building integration or as export products to sunny regions.

Michael Koehl; Sandrin Saile; Andreas Piekarczyk; Stephan Fischer

2014-01-01T23:59:59.000Z

146

Collection and analysis of component failure data from jet systems: neutral beam injectors and power supply  

Science Journals Connector (OSTI)

The objective of this ongoing activity is to develop a fusion specific component failure database with data coming from operating experiences gained in various fusion laboratories. The activity began in 2001 with the study of the Joint European Torus (JET) Vacuum and Active Gas Handling Systems. Two years later the neutral beam injectors (NBI) and the power supply (PS) systems were considered and since last year the ion cyclotron resonant heating system is under evaluation.The number of failures/malfunctions that have occurred during the years of operations, failure modes and, where possible, causes and consequences of the failures were identified, as well as the sets of components under analysis. Components were classified and counted in order to determine component counts by type of component, related total operating hours and related demands to operate (for components operating in an intermittent manner). Main reliability parameters (such as the failure rate and corresponding standard errors and confidence intervals) for the component types were also estimated. In this paper the NBI and PS results are presented.

T. Pinna; G. Cambi; F. Gravanti

2007-01-01T23:59:59.000Z

147

Kinetic Modeling of Gasoline Surrogate Components and Mixtures under Engine Conditions  

SciTech Connect

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, an improved version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multicomponent gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines (3-50 atm, 650-1200K, stoichiometric fuel/air mixtures). Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Pitz, W J; Westbrook, C K; Curran, H J

2010-01-11T23:59:59.000Z

148

The Regional Ocean Modeling System (ROMS) 4-dimensional variational data assimilation systems  

E-Print Network (OSTI)

The Regional Ocean Modeling System (ROMS) 4-dimensional variational data assimilation systems Part Article history: Available online xxxx a b s t r a c t The Regional Ocean Modeling System (ROMS) 4 of the various components of ROMS 4D-Var. In par- ticular, we present a comparison of three approaches to 4D

Costa, Daniel P.

149

Building and Connecting Components  

Science Journals Connector (OSTI)

While equations are an essential part of model development, it quickly becomes tedious to write out all the equations for the components in a system. In this chapter, we show how to reuse constitutive equation...

Michael Tiller Ph.D.

2001-01-01T23:59:59.000Z

150

Seamless remote dismantling system for heavy and highly radioactive components of Korean nuclear power plants  

Science Journals Connector (OSTI)

Abstract A seamless remote system for dismantling heavy and highly radioactive components during the decommissioning of a nuclear power plant is proposed. The originality of the dismantling system is in its ability to handle all the processes involved in the dismantling of major components of a nuclear power plant without external intervention. Previous types of dismantling equipment were designed for specific components or a particular process, which required time consuming and risky equipment replacement tasks between different processes. The proposed dismantling system was designed and verified by simulation of all the processes for dismantling the major components of a Korean nuclear power plant. Several challenges such as working in confined spaces and with complex movement lines as well as interference between components were overcome. The proposed system is capable of handling all the dismantling processes without equipment replacement tasks or the need to drain the reactor pool. The system is expected to considerably reduce the time and cost of the entire decommissioning process while also improving safety.

Dongjun Hyun; Sung-Uk Lee; Yong-Chil Seo; Geun-Ho Kim; Jonghwan Lee; Kwan-Seong Jeong; Byung-Seon Choi; Jei-Kwon Moon

2014-01-01T23:59:59.000Z

151

Reliability Modeling and Evaluation in Aging Power Systems  

E-Print Network (OSTI)

Renewal process has been often employed as a mathematical model of the failure and repair cycle of components in power system reliability assessment. This implies that after repair, the component is assumed to be restored to be in as good as new...

Kim, Hag-Kwen

2010-01-14T23:59:59.000Z

152

Proposal full title: Comprehensive Modelling of the Earth System for  

E-Print Network (OSTI)

.....................................................................................................................7 1.1.4 Earth System Model Ensemble-scale integrating project Work programme topics addressed: ENV.2008.1.1.4.1. New components in Earth System modelling for better climate projections Name of the coordinating person: Marco Giorgetta List

Couvreux, Fleur

153

MacroMacro--SystemSystem--Model Overview:Model Overview: DOE H2 Analysis WorkshopDOE H2 Analysis Workshop  

E-Print Network (OSTI)

Cell Cost Models Vehicle Selection Model Gasoline Vehicle Cost Models Environmental Performance Model to analyze components and subsystems of an eventual hydrogen economy, a modeling architecture does not exist that addresses the overarching hydrogen fuel infrastructure as a "system." Such a macro-system model is critical

154

Review of modeling methods for HVAC systems  

Science Journals Connector (OSTI)

Abstract This work presents the literature review of the methods used to model the heating, ventilation, and air conditioning (HVAC) systems. The model development is necessary for the study of the energy consumption of HVAC systems. Models are also required to simulate the different supervisory and local loop control strategies to improve the energy consumption efficiency. HVAC systems have complex structures consisting of heat and mass transfer equipment such as chiller, boiler, heating/cooling coils, and supply air ducts. HVAC systems also consist of several sensors and controllers for regulating the controllable variables such as zone temperature, supply air temperature, supply air fan speed, duct static pressure, and chilled water temperature at their set-points. To predict the energy consumption by the HVAC systems accurately, one needs to model the individual components either from the measured data or based on the knowledge of the underlying physical phenomenon. This results in three broad classes of the models known as data driven, physics based, and grey box models. In this paper, major data driven, physics based, and grey box modeling techniques reported in the recent literature are reviewed.

Abdul Afram; Farrokh Janabi-Sharifi

2014-01-01T23:59:59.000Z

155

Systems Advisor Model | Department of Energy  

Energy Savers (EERE)

Systems Advisor Model Systems Advisor Model Systems Advisor Model (SAM) makes performance predictions and cost of energy estimates for grid-connected power projects based on...

156

The Community Surface Dynamics Modeling System: Experiences on Building a Collaborative Modeling Platform  

E-Print Network (OSTI)

The Community Surface Dynamics Modeling System: Experiences on Building a Collaborative Modeling VOLUNTEERISM MANY DEVELOPERS Grand Challenge: Building a Toolbox of Component Models with guidance and input Members and Governance · Tools for Collaboration 1) CSDMS Wiki 2) CSDMS Modeling Tool · Strategies

Wright, Dawn Jeannine

157

Modeling and optimization of building HVAC systems.  

E-Print Network (OSTI)

??This thesis presents the development of hybrid modeling methodologies for HVAC component static/steady-state models and dynamic/transient models, and the development and implementation of a model-based (more)

Jin, Guang Yu.

2012-01-01T23:59:59.000Z

158

Judging model reduction of complex systems  

Science Journals Connector (OSTI)

Model reduction is a common goal in the study of complex systems, consisting of many components with a complex interaction structure. The quality of such reduction, however, may not be reflected correctly in the stepwise prediction error in the model since it ignores the global geometry of the dynamics. Here we introduce a general two-step framework, consisting of dimensionality reduction of the time series followed by modeling of the resulting time series, and propose the use of the shadowing distance to measure the quality of the second step. Using coupled oscillator networks as a prototypical example, we demonstrate that our approach can outperform those based on stepwise error and suggest that it sheds light on the problem of identifying and modeling low-dimensional dynamics in large-scale complex systems.

Jie Sun; Erik M. Bollt; Takashi Nishikawa

2011-04-27T23:59:59.000Z

159

The MAGS Integrated Modeling System  

Science Journals Connector (OSTI)

The Mackenzie GEWEX Study (MAGS) integrated modeling system was developed to couple, with full feedback, selected atmospheric and hydrologic models, with the expectation that the imposed consistency will enhan...

E. D. (Ric) Soulis; Frank R. Seglenieks

2008-01-01T23:59:59.000Z

160

Macro-System Model Overview  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on Macro-System Model Overview given by Mark Ruth of the National Renewable Energy Laboratory during the DOE Hydrogen Transition Analysis Workshop on January 26, 2006.

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Failure Predictions for VHTR Core Components using a Probabilistic Contiuum Damage Mechanics Model  

SciTech Connect

The proposed work addresses the key research need for the development of constitutive models and overall failure models for graphite and high temperature structural materials, with the long-term goal being to maximize the design life of the Next Generation Nuclear Plant (NGNP). To this end, the capability of a Continuum Damage Mechanics (CDM) model, which has been used successfully for modeling fracture of virgin graphite, will be extended as a predictive and design tool for the core components of the very high- temperature reactor (VHTR). Specifically, irradiation and environmental effects pertinent to the VHTR will be incorporated into the model to allow fracture of graphite and ceramic components under in-reactor conditions to be modeled explicitly using the finite element method. The model uses a combined stress-based and fracture mechanics-based failure criterion, so it can simulate both the initiation and propagation of cracks. Modern imaging techniques, such as x-ray computed tomography and digital image correlation, will be used during material testing to help define the baseline material damage parameters. Monte Carlo analysis will be performed to address inherent variations in material properties, the aim being to reduce the arbitrariness and uncertainties associated with the current statistical approach. The results can potentially contribute to the current development of American Society of Mechanical Engineers (ASME) codes for the design and construction of VHTR core components.

Fok, Alex

2013-10-30T23:59:59.000Z

162

Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LTR-2012/390 LTR-2012/390 Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment R. E. Stoller, A. V. Barashev, and S. I. Golubov Materials Science and Technology Division Oak Ridge National Laboratory Prepared for: Light Water Reactor Sustainability Program Office of Nuclear Energy, Science and Technology U.S. Department of Energy September 2012 ORNL/LTR-2012/390 1 Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment Abstract Recent experimental observations have made it clear that cavity formation can occur in light-water reactor internal components fabricated from austenitic stainless during the course of their service life. In order to assess the potential for cavity swelling

163

A two-component heavy fuel oil evaporation model for CFD studies in marine Diesel engines  

Science Journals Connector (OSTI)

Abstract The paper presents an evaporation model for Heavy Fuel Oil (HFO) combustion studies. In the present work, HFO is considered as a mixture of a heavy and a light fuel component, with the thermophysical properties of the heavy component calculated from the recently introduced model of Kyriakides et al. (2009) [1]. The model proposes a proper treatment of convective heat transfer to the evaporating fuel droplets. Computational Fluid Dynamics (CFD) simulations of HFO spray combustion in constant volume chambers are performed, utilizing a modified characteristic time combustion model. The results are in good agreement with literature experimental data. Computational results for a two-stroke marine Diesel engine also compare favorably against experiments. The present development yields a basis for detailed CFD studies of HFO combustion in large marine Diesel engines.

Nikolaos Stamoudis; Christos Chryssakis; Lambros Kaiktsis

2014-01-01T23:59:59.000Z

164

Independent Component Analysis For EEG Source Localization In Realistic Head Models  

E-Print Network (OSTI)

1 Independent Component Analysis For EEG Source Localization In Realistic Head Models Leonid Zhukov Abstract--- A pervasive problem in neuroscience is determining which regions of the brain are active, given within the brain from electroencephalo­ graphic (EEG) recordings is an ill­posed problem. Specifi­ cally

Utah, University of

165

Independent Component Analysis For EEG Source Localization In Realistic Head Models  

E-Print Network (OSTI)

1 Independent Component Analysis For EEG Source Localization In Realistic Head Models Leonid Zhukov Abstract-- A pervasive problem in neuroscience is determining which regions of the brain are active, given within the brain from electroencephalo- graphic (EEG) recordings is an ill-posed problem. Specifi- cally

Utah, University of

166

Development and application of earth system models  

Science Journals Connector (OSTI)

...Development and application of earth system models 10.1073/pnas.1107470109...to climate mitigation that earth system models can help inform. These models...processes. Why do we need earth system models (ESMs)? First, such models...

Ronald G. Prinn

2013-01-01T23:59:59.000Z

167

Ambient variation-tolerant and inter components aware thermal management for mobile system on chips  

E-Print Network (OSTI)

, such as thermal conductivity and heat capacity of the package including cover, display and battery are measuredAmbient variation-tolerant and inter components aware thermal management for mobile system on chips:josephz@qti.qualcomm.com Abstract-- In this work we measure and study two key aspects of the thermal behavior of smartphones: 1

Simunic, Tajana

168

Self-Assembly in Chains, Rings, and Branches: A Single Component System with Two Critical Points  

E-Print Network (OSTI)

Self-Assembly in Chains, Rings, and Branches: A Single Component System with Two Critical Points October 2013) We study the interplay between phase separation and self-assembly in chains, rings. The emergence of the lower critical point is caused by the self-assembly of rings taking place in the vapor

Sciortino, Francesco

169

Components of an environmental observatory information system Jeffery S. Horsburgh a,n  

E-Print Network (OSTI)

of cyberinfrastructure. In this paper, we describe the architecture and functional requirements for an environmentalComponents of an environmental observatory information system Jeffery S. Horsburgh a,n , David G and Environmental Engineering, Utah State University, Logan, UT, USA b Center for Research in Water Resources

Tarboton, David

170

A Distributed Object Component-based Approach to Large-scale Engineering Systems and an Example Component Using Motion Planning Techniques for  

E-Print Network (OSTI)

but robust enough to be truly useful for engineering- specific services. This paper introduces a distributedA Distributed Object Component-based Approach to Large-scale Engineering Systems and an Example. Kunz2 , Kincho H. Law3 Abstract This paper introduces a large-scale engineering systems distributed

Stanford University

171

Model system for slow dynamics  

Science Journals Connector (OSTI)

Systems whose dynamics are described by a quasilogarithmic or stretched-exponential time dependence are usually fitted by models which use disorder to create a distribution of relaxation times. Here we describe a model which decays slowly towards equilibrium but does not require disorder to provide the slow dynamics. The model consists of a spin system with the spins interacting via the dipole-dipole interaction. The model is able to replicate the more pronounced features observed in the magnetization decay of magnetic systems and high-temperature superconductors.

D. K. Lottis; R. M. White; E. Dan Dahlberg

1991-07-15T23:59:59.000Z

172

Reference Model for Control and Automation Systems in Electrical Power |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Model for Control and Automation Systems in Electrical Model for Control and Automation Systems in Electrical Power Reference Model for Control and Automation Systems in Electrical Power Modern infrastructure automation systems are threatened by cyber attack. Their higher visibility in recent years and the increasing use of modern information technology (IT) components contribute to increased security risk. A means of analyzing these infrastructure automation systems is needed to help understand and study the many system relationships that affect the overall security of the system. Modeling these systems is a very cost effective means of addressing the problem of security from an overall system view. The model presented in the document below provides a structured, cost effective approach to address technical security in process control systems

173

Earth System Models  

Science Journals Connector (OSTI)

Earth system analysis this term is often associated with the study of the solid Earth with its surrounding spheres, the atmosphere, cryosphere, and hydrosphere. However, within IGBP (the International Geos...

Martin Clussen

2001-01-01T23:59:59.000Z

174

Model documentation Renewable Fuels Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analaytical approach and design of the National Energy Modeling System (NEMS) Renewable Fuels Module (RFM) as it relates to the production of the 1996 Annual Energy Outlook forecasts. The report catalogues and describes modeling assumptions, computational methodologies, data inputs, and parameter estimation techniques. A number of offline analyses used in lieu of RFM modeling components are also described.

NONE

1996-01-01T23:59:59.000Z

175

Program plan for research and development of HVDC power systems and components  

SciTech Connect

The Division of Electric Energy Systems (EES) of the US Department of Energy (DOE) has formulated a program for research and development (R and D) of high-voltage direct-current (HVDC) power transmission and delivery systems and associated dc components. The program includes analysis of future utility system applications, development of new HVDC control and protection concepts, and advanced dc component research. The structure of this program will provide an appropriate balance between mid- and long-term options for the enhancement of HVDC power transmission and delivery for future electric power systems. This HVDC research program is intended to further develop and improve an important energy transport technology, one that will offer many opportunities to reduce future energy costs. The economics and operating constraints in alternating-current (ac) solutions strongly indicate that new HVDC technology options will be advantageous and will provide an enhanced ability to use generation and transmission system resources efficiently and economically in existing electric energy systems. Studies show that further development of this technology will lead to significant integration of new HVDC techniques into existing electric energy systems with appreciable economic and technical benefit. The R and D proposed in this HVDC Program Plan will be of substantial value to future electric power systems.

Not Available

1984-01-01T23:59:59.000Z

176

Toward self-describing and workflow integrated Earth system models: A coupled atmosphere-ocean modeling system application  

Science Journals Connector (OSTI)

The complexity of Earth system models and their applications is increasing as a consequence of scientific advances, user demand, and the ongoing development of computing platforms, storage systems and distributed high-resolution observation networks. Multi-component Earth system models need to be redesigned to make interactions among model components and other applications external to the modeling system easier. To that end, the common component interfaces of Earth system models can be redesigned to increase interoperability between models and other applications such as various web services, data portals and science gateways. The models can be made self-describing so that the many configuration, build options and inputs of a simulation can be recorded. In this paper, we present a coupled modeling system that includes the proposed methodology to create self-describing models with common model component interfaces. The designed coupled atmosphere-ocean modeling system is also integrated into a scientific workflow system to simplify routine modeling tasks and relationships between these tasks and to demonstrate the enhanced interoperability between different technologies and components. Later on, the work environment is tested using a realistic Earth system modeling application. As can be seen through this example, a layered design for collecting provenance and metadata has the added benefit of documenting a run in far greater detail than before. In this way, it facilitates exploration and understanding of simulations and leads to possible reproducibility. In addition to designing self-describing Earth system models, the regular modeling tasks are also simplified and automated by using a scientific workflow which provides meaningful abstractions for the model, computing environment and provenance/metadata collection mechanisms. Our aim here is to solve a specific instance of a complex model integration problem by using a framework and scientific workflow approach together. The reader may also note that the methods presented in this paper might be also generalized to other types of Earth system models, leading to improved ease of use and flexibility. The initial results also show that the coupled atmosphere-ocean model, which is controlled by the designed workflow environment, is able to reproduce the Mediterranean Sea surface temperature when it is compared with the used CCSM3 initial and boundary conditions.

Ufuk Utku Turuncoglu; Nuzhet Dalfes; Sylvia Murphy; Cecelia DeLuca

2013-01-01T23:59:59.000Z

177

Flow simulation of the Component Development Integration Facility magnetohydrodynamic power train system  

SciTech Connect

This report covers application of Argonne National Laboratory`s (ANL`s) computer codes to simulation and analysis of components of the magnetohydrodynamic (MHD) power train system at the Component Development and Integration Facility (CDIF). Major components of the system include a 50-MWt coal-fired, two-stage combustor and an MHD channel. The combustor, designed and built by TRW, includes a deswirl section between the first and the second-stage combustor and a converging nozzle following the second-stage combustor, which connects to the MHD channel. ANL used computer codes to simulate and analyze flow characteristics in various components of the MHD system. The first-stage swirl combustor was deemed a mature technology and, therefore, was not included in the computer simulation. Several versions of the ICOMFLO computer code were used for the deswirl section and second-stage combustor. The MGMHD code, upgraded with a slag current leakage submodel, was used for the MHD channel. Whenever possible data from the test facilities were used to aid in calibrating parameters in the computer code, to validate the computer code, or to set base-case operating conditions for computations with the computer code. Extensive sensitivity and parametric studies were done on cold-flow mixing in the second-stage combustor, reacting flow in the second-stage combustor and converging nozzle, and particle-laden flow in the deswirl zone of the first-stage combustor, the second-stage combustor, and the converging nozzle. These simulations with subsequent analysis were able to show clearly in flow patterns and various computable measures of performance a number of sensitive and problematical areas in the design of the power train. The simulations of upstream components also provided inlet parameter profiles for simulation of the MHD power generating channel. 86 figs., 18 tabs.

Chang, S.L.; Lottes, S.A.; Bouillard, J.X.; Petrick, M.

1997-11-01T23:59:59.000Z

178

Stochastic Modeling of a Power-Managed System: Construction and Optimization  

E-Print Network (OSTI)

1 Stochastic Modeling of a Power-Managed System: Construction and Optimization Qinru Qiu, Qing Wu of a power-managed electronic system. We formulate the problem of system-level power management-digital components. Dynamic power management ­ which refers to a selective shut-off or slow-down of system components

Pedram, Massoud

179

Cryogenic system for ITER CS model coil  

SciTech Connect

A 5-kW/4.5-K helium refrigerator has been developed, which will be used for the test of ITER Central Solenoid Model Coil that is under fabrication by an international collaboration under the framework of the ITER Engineering Design Activity. Its acceptance test was recently finished and its specified refrigeration power of 5 kW with a surplus liquefaction rate of 114 1/h was demonstrated. A major feature of the refrigerator is that newly developed components, such as helium compressor and turbo-expander, are adopted in its simple refrigeration process in order that the results will be transferred to the ITER helium cryogenic system.

Kato, T.; Hamada, K.; Kawano, K.; Hiyama, T. [JAERI, Naka Fusion Research Establishment, Nada-machi, Nada-gun, Ibaraki-ken (Japan)] [and others

1996-12-31T23:59:59.000Z

180

Modeling Stress Strain Relationships and Predicting Failure Probabilities For Graphite Core Components  

SciTech Connect

This project will implement inelastic constitutive models that will yield the requisite stress-strain information necessary for graphite component design. Accurate knowledge of stress states (both elastic and inelastic) is required to assess how close a nuclear core component is to failure. Strain states are needed to assess deformations in order to ascertain serviceability issues relating to failure, e.g., whether too much shrinkage has taken place for the core to function properly. Failure probabilities, as opposed to safety factors, are required in order to capture the bariability in failure strength in tensile regimes. The current stress state is used to predict the probability of failure. Stochastic failure models will be developed that can accommodate possible material anisotropy. This work will also model material damage (i.e., degradation of mechanical properties) due to radiation exposure. The team will design tools for components fabricated from nuclear graphite. These tools must readily interact with finite element software--in particular, COMSOL, the software algorithm currently being utilized by the Idaho National Laboratory. For the eleastic response of graphite, the team will adopt anisotropic stress-strain relationships available in COMSO. Data from the literature will be utilized to characterize the appropriate elastic material constants.

Duffy, Stephen

2013-09-09T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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181

The Community Climate System Model: CCSM3  

SciTech Connect

A new version of the Community Climate System Model (CCSM) has been developed and released to the climate community. CCSM3 is a coupled climate model with components representing the atmosphere, ocean, sea ice, and land surface connected by a flux coupler. CCSM3 is designed to produce realistic simulations over a wide range of spatial resolutions, enabling inexpensive simulations lasting several millennia or detailed studies of continental-scale climate change. This paper will show results from the configuration used for climate-change simulations with a T85 grid for atmosphere and land and a 1-degree grid for ocean and sea-ice. The new system incorporates several significant improvements in the scientific formulation. The enhancements in the model physics are designed to reduce or eliminate several systematic biases in the mean climate produced by previous editions of CCSM. These include new treatments of cloud processes, aerosol radiative forcing, land-atmosphere fluxes, ocean mixed-layer processes, and sea-ice dynamics. There are significant improvements in the sea-ice thickness, polar radiation budgets, equatorial sea-surface temperatures, ocean currents, cloud radiative effects, and ENSO teleconnections. CCSM3 can produce stable climate simulations of millenial duration without ad hoc adjustments to the fluxes exchanged among the component models. Nonetheless, there are still systematic biases in the ocean-atmosphere fluxes in western coastal regions, the spectrum of ENSO variability, the spatial distribution of precipitation in the Pacific and Indian Oceans, and the continental precipitation and surface air temperatures. We conclude with the prospects for extending CCSM to a more comprehensive model of the Earth's climate system.

Collins, W D; Blackmon, M; Bitz, C; Bonan, G; Bretherton, C S; Carton, J A; Chang, P; Doney, S; Hack, J J; Kiehl, J T; Henderson, T; Large, W G; McKenna, D; Santer, B D; Smith, R D

2004-12-27T23:59:59.000Z

182

Modeling of reactor components using FIDAP: a finite element computer code  

E-Print Network (OSTI)

. ? e model are listed in table 1. 19 CHAPTER III FLUID AND THERMAL MIXING IN THE COLD LEG AND DOWNCOMER OF A PWR - A BENCHMARK In order to vahdste the code FIDAP, s, thermal mixing experiment is simulated This is basically a test of the field...MODELING OF REACTOR COMPONENTS USING FIDAP - A FINITE ELEMENT COMPUTE& CODE A Thesrs by ANAND GANGADHARAN Subnutted to the Office of Graduate Stuches of Texs, s ARM University in partial fulfillment of the requirements for the degree...

Gangadharan, Anand

2012-06-07T23:59:59.000Z

183

Physical system modeling with Modelica  

Science Journals Connector (OSTI)

A new language, called ModelicaTM, for the modeling of physical systems has been developed in an international effort. The main objective was to make it easy to exchange models and model libraries. The design approach builds on non-causal modeling with true ordinary differential and algebraic equations and the use of object-oriented constructs to facilitate the reuse of modeling knowledge. There are already several modeling languages based on these ideas, available from universities and small companies. There is also significant experience of using them in various applications. The aim of the Modelica effort was to unify the concepts and to design a new uniform language for model representation. The paper describes the effort, gives an overview of Modelica, and demonstrates how Modelica is used in real-world applications: modeling of an automatic gearbox and of a heat exchanger.

Sven Erik Mattsson; Hilding Elmqvist; Martin Otter

1998-01-01T23:59:59.000Z

184

Thermodynamic phase-field model for microstructure with multiple components and phases: The possibility of metastable phases  

E-Print Network (OSTI)

A diffuse-interface model for microstructure with an arbitrary number of components and phases was developed from basic thermodynamic and kinetic principles and formalized within a variational framework. The model includes ...

Cogswell, Daniel A.

185

Design and development of a special purpose SAFT system for nondestructive evaluation of nuclear reactor vessels and piping components  

SciTech Connect

This report describes the design details of a special purpose system for real-time nondestructive evaluation of reactor vessels and piping components. The system consists of several components and the report presents the results of the research aimed at the design of each component and recommendations based on the results. One major component of the NDE system, namely the real-time SAFT processor, was designed with sufficient details to enable the fabrications of a prototype by GARD Inc. under a subcontract from The University of Michigan and the report includes their results and conclusions.

Ganapathy, S.; Schmult, B.; Wu, W.S.; Dennehy, T.G.; Moayeri, N.; Kelly, P.

1985-08-01T23:59:59.000Z

186

Efficient energy based modeling and experimental validation of liquid filling in planar micro-fluidic components and networks  

E-Print Network (OSTI)

Efficient energy based modeling and experimental validation of liquid filling in planar micro-fluidic components and networks I. Treise, N. Fortner, B. Shapiro* and A. Hightower Received 25th June 2004, Accepted409680k This paper presents a model that describes how liquid flow fills micro-fluidic components

Shapiro, Benjamin

187

HVAC Component Data Modeling Using Industry Foundation Classes Vladimir Bazjanac, Lawrence Berkeley National Laboratory, U.S.A.  

E-Print Network (OSTI)

1 HVAC Component Data Modeling Using Industry Foundation Classes Vladimir Bazjanac, Lawrence. This paper describes a number of aspects of a major extension of the HVAC part of the IFC data model. First is the introduction of a more generic approach for handling HVAC components. This includes type information, which

188

A Simulation Model for Evaluating Distributed Systems Dependability  

E-Print Network (OSTI)

In this paper we present a new simulation model designed to evaluate the dependability in distributed systems. This model extends the MONARC simulation model with new capabilities for capturing reliability, safety, availability, security, and maintainability requirements. The model has been implemented as an extension of the multithreaded, process oriented simulator MONARC, which allows the realistic simulation of a wide-range of distributed system technologies, with respect to their specific components and characteristics. The extended simulation model includes the necessary components to inject various failure events, and provides the mechanisms to evaluate different strategies for replication, redundancy procedures, and security enforcement mechanisms, as well. The results obtained in simulation experiments presented in this paper probe that the use of discrete-event simulators, such as MONARC, in the design and development of distributed systems is appealing due to their efficiency and scalability.

Dobre, Ciprian; Cristea, Valentin

2012-01-01T23:59:59.000Z

189

Building Component Library: An Online Repository to Facilitate Building Energy Model Creation: Preprint  

NLE Websites -- All DOE Office Websites (Extended Search)

Component Library: Component Library: An Online Repository to Facilitate Building Energy Model Creation Preprint Katherine Fleming, Nicholas Long, and Alex Swindler To be presented at the ACEEE Summer Study on Energy Efficiency in Buildings Pacific Grove, California August 12-17, 2012 Conference Paper NREL/CP-5500-54710 May 2012 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

190

Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low-cost alloy may improve its resistance to such sulfidation attack, and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. The primary activity this period was preparation and presentation of the findings on this project at the Twenty-Third annual Pittsburgh Coal Conference. Dr. Malhotra attended this conference and presented a paper. A copy of his presentation constitutes this quarterly report.

Gopala N. Krishnan; Ripudaman Malhotra; Esperanza Alvarez; Kai-Hung Lau; Jordi Perez Mariano; Angel Sanjurjo

2006-09-30T23:59:59.000Z

191

Lagrangian Framework for Systems Composed of High-Loss and Lossless Components  

E-Print Network (OSTI)

Using a Lagrangian mechanics approach, we construct a framework to study the dissipative properties of systems composed of two components one of which is highly lossy and the other is lossless. We have shown in our previous work that for such a composite system the modes split into two distinct classes, high-loss and low-loss, according to their dissipative behavior. A principal result of this paper is that for any such dissipative Lagrangian system, with losses accounted by a Rayleigh dissipative function, a rather universal phenomenon occurs, namely, selective overdamping: The high-loss modes are all overdamped, i.e., non-oscillatory, as are an equal number of low-loss modes, but the rest of the low-loss modes remain oscillatory each with an extremely high quality factor that actually increases as the loss of the lossy component increases. We prove this result using a new time dynamical characterization of overdamping in terms of a virial theorem for dissipative systems and the breaking of an equipartition of energy.

Alex Figotin; Aaron Welters

2013-12-31T23:59:59.000Z

192

The Community Climate System Model Version 4  

SciTech Connect

The fourth version of the Community Climate System Model (CCSM4) was recently completed and released to the climate community. This paper describes developments to all the CCSM components, and documents fully coupled pre-industrial control runs compared to the previous version, CCSM3. Using the standard atmosphere and land resolution of 1{sup o} results in the sea surface temperature biases in the major upwelling regions being comparable to the 1.4{sup o} resolution CCSM3. Two changes to the deep convection scheme in the atmosphere component result in the CCSM4 producing El Nino/Southern Oscillation variability with a much more realistic frequency distribution than the CCSM3, although the amplitude is too large compared to observations. They also improve the representation of the Madden-Julian Oscillation, and the frequency distribution of tropical precipitation. A new overflow parameterization in the ocean component leads to an improved simulation of the deep ocean density structure, especially in the North Atlantic. Changes to the CCSM4 land component lead to a much improved annual cycle of water storage, especially in the tropics. The CCSM4 sea ice component uses much more realistic albedos than the CCSM3, and the Arctic sea ice concentration is improved in the CCSM4. An ensemble of 20th century simulations runs produce an excellent match to the observed September Arctic sea ice extent from 1979 to 2005. The CCSM4 ensemble mean increase in globally-averaged surface temperature between 1850 and 2005 is larger than the observed increase by about 0.4 C. This is consistent with the fact that the CCSM4 does not include a representation of the indirect effects of aerosols, although other factors may come into play. The CCSM4 still has significant biases, such as the mean precipitation distribution in the tropical Pacific Ocean, too much low cloud in the Arctic, and the latitudinal distributions of short-wave and long-wave cloud forcings.

Gent, Peter R.; Danabasoglu, Gokhan; Donner, Leo J.; Holland, Marika M.; Hunke, Elizabeth C.; Jayne, Steve R.; Lawrence, David M.; Neale, Richard; Rasch, Philip J.; Vertenstein, Mariana; Worley, Patrick; Yang, Zong-Liang; Zhang, Minghua

2011-10-01T23:59:59.000Z

193

Correct Execution of Reconfiguration for Stateful Components  

Science Journals Connector (OSTI)

In component-based software engineering, reconfiguration describes structural changes to the architecture of a component system. For stateful components, not only structural but also behavioural aspects have to be taken into account in reconfiguration. ... Keywords: Reconfiguration, model checking, stateful components

Moritz Hammer; Alexander Knapp

2010-01-01T23:59:59.000Z

194

Developing a change-point principal component predictive model for energy use in a supermarket  

E-Print Network (OSTI)

of the Thanksgiving Day. On these days , the store opens fewer than 18 hours. The store has a typical supermarket electrical consumption pattern (2). The estimated distribution of the peak demand of the electrical systems is: refrigeration cases and compressors... on heat recovery from the refrigeration system and, therefore, does not consume electricity; however the COP of the refrigeration system increases as the ambient temperature decreases. Hence, it is desirable to develop a more general change point model...

Chen, Lu

2012-06-07T23:59:59.000Z

195

THE COMPONENT TEST FACILITY A NATIONAL USER FACILITY FOR TESTING OF HIGH TEMPERATURE GAS-COOLED REACTOR (HTGR) COMPONENTS AND SYSTEMS  

SciTech Connect

The Next Generation Nuclear Plant (NGNP) and other High-Temperature Gas-cooled Reactor (HTGR) Projects require research, development, design, construction, and operation of a nuclear plant intended for both high-efficiency electricity production and high-temperature industrial applications, including hydrogen production. During the life cycle stages of an HTGR, plant systems, structures and components (SSCs) will be developed to support this reactor technology. To mitigate technical, schedule, and project risk associated with development of these SSCs, a large-scale test facility is required to support design verification and qualification prior to operational implementation. As a full-scale helium test facility, the Component Test facility (CTF) will provide prototype testing and qualification of heat transfer system components (e.g., Intermediate Heat Exchanger, valves, hot gas ducts), reactor internals, and hydrogen generation processing. It will perform confirmation tests for large-scale effects, validate component performance requirements, perform transient effects tests, and provide production demonstration of hydrogen and other high-temperature applications. Sponsored wholly or in part by the U.S. Department of Energy, the CTF will support NGNP and will also act as a National User Facility to support worldwide development of High-Temperature Gas-cooled Reactor technologies.

David S. Duncan; Vondell J. Balls; Stephanie L. Austad

2008-09-01T23:59:59.000Z

196

Development of an in vitro model for migration inhibitory factor utilizing a component of cobra venom  

E-Print Network (OSTI)

of Committee~ Head of Depar me j'7 c Member Membe May 1976 ABSTRACT Development of an In Vitro Model for Migration Inhibitory Factor Utilizing a Component of Cobra Venon. May (1976) Lee James Carmack, B. S. , Texas ASM University; Chairman of Advisory... of fractions eluted from the ion exchange column 2 Effects of whole cobra venom (CV), dialyzed cobra venom (OCV), Arvin, and Venacil on migration of normal mouse peritoneal exudate cells in cell culture 3 Effects on migration of normal mouse peritoneal...

Carmack, Lee James

1976-01-01T23:59:59.000Z

197

Terrestrial Carbon Cycle: Climate Relations in Eight CMIP5 Earth System Models  

Science Journals Connector (OSTI)

Eight Earth System Models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) are evaluated, focusing on both the net carbon dioxide flux and its components and their relation with climatic variables (temperature, precipitation, and ...

Pu Shao; Xubin Zeng; Koichi Sakaguchi; Russell K. Monson; Xiaodong Zeng

2013-11-01T23:59:59.000Z

198

Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high-temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low-cost alloy may improve its resistance to such sulfidation attack, and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. During this period, we conducted two 300-hour tests. In the first test, we exposed samples at 900 C under conditions simulating the high-temperature heat recovery unit (HTHRU). The second test was at 370 C, corresponding to the filter units following the HTHRU. The tests were showed the resilience of silicon nitride as a coating component, and the new coating procedures better penetrated the pores in sintered metal filter samples. Finally, we also received samples that were exposed in the Wabash River plant. Unfortunately, all these samples, that were prepared last year, were severely eroded and/or corroded.

Gopala N. Krishnan; Ripudaman Malhotra; Esperanza Alvarez; Kai-Hung Lau; Jordi Perez-Mariano; Angel Sanjurjo

2005-03-15T23:59:59.000Z

199

Fault Diagnosis for Dynamic Nonlinear System Based on Kernel Principal Component Analysis  

Science Journals Connector (OSTI)

Kernel principal component analysis is a type of nonlinear principal component analysis, to decouple the nonlinear correlation of variables by using kernel functions and integral operators, and by computing the principal components in the high dimensional ...

Yanwei Huang; Xianbo Qiu

2009-04-01T23:59:59.000Z

200

Modeling Mobile Agent Systems with High Level Petri Nets Dianxiang Xu and Yi Deng  

E-Print Network (OSTI)

Modeling Mobile Agent Systems with High Level Petri Nets Dianxiang Xu and Yi Deng School-based approach for architectural modeling of mobile agent systems. Agent template (net) is proposed to model as a component, consisting of mobility environment (system net), agent templates (agent nets), and internal

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Cryogenic system component development for the fusion experimental reactor at JAERI  

SciTech Connect

The major objective of fusion R and D at the Japan Atomic Energy Research Institute (JAERI) is to construct the Fusion Experimental Reactor (FER) to follow JT-60. The construction of FER inevitably requires development of a large, reliable, and efficient helium liquefier/refrigerator and the more advanced cryogenic technology for cooling superconducting toroidal and poloidal coils. Typical characteristics required for the cryogenic system of FER are 10 to 20 kW at 4 K as one unit, reliability for > 8000 h, a stable pulsed heat load, and high-energy efficiency of > 1/500. In this cryogenic system, the major components such as the helium compressor, turbo-expander, cold circulation pump for supercritical helium, and cold compressor to reduce operating temperature below 4 K should be scaled up to a mass flow rate of > 1000 g/s. For this purpose, JAERI has developed cryogenics since 1980 in accordance with the development program in which the scaling up of the major components mentioned above are involved as well as cooling technology development.

Kato, T.; Kamiya, S.; Tada, E.; Hiyama, T.; Kawano, K.; Shimamoto, S.

1986-01-01T23:59:59.000Z

202

DYNAMIC MODELLING OF AUTONOMOUS POWER SYSTEMS INCLUDING RENEWABLE POWER SOURCES.  

E-Print Network (OSTI)

(thermal, gas, diesel) and renewable (hydro, wind) power units. The objective is to assess the impact - that have a special dynamic behaviour, and the wind turbines. Detailed models for each one of the power system components are developed. Emphasis is given in the representation of different hydro power plant

Paris-Sud XI, Université de

203

Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework  

SciTech Connect

This is a working report drafted under the Risk-Informed Safety Margin Characterization pathway of the Light Water Reactor Sustainability Program, describing statistical models of passives component reliabilities.

Unwin, Stephen D.; Lowry, Peter P.; Layton, Robert F.; Toloczko, Mychailo B.; Johnson, Kenneth I.; Sanborn, Scott E.

2011-07-01T23:59:59.000Z

204

EIA - The National Energy Modeling System: An Overview 2003-Introduction  

Gasoline and Diesel Fuel Update (EIA)

Introduction Introduction The National Energy Modeling System: An Overview 2003 Introduction The National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of U.S. energy markets for the midterm period through 2025. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. NEMS was designed and implemented by the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE). The National Energy Modeling System: An Overview 2003 presents an overview of the structure and methodology of NEMS and each of its components. This chapter provides a description of the design and objectives of the system, followed by a chapter on the overall modeling structure and solution algorithm. The remainder of the report summarizes the methodology and scope of the component modules of NEMS. The model descriptions are intended for readers familiar with terminology from economics, operations research, and energy modeling. More detailed model documentation reports for all the NEMS modules are also available from EIA (Appendix, “Bibliography”).

205

Generalized spin systems and ? models  

Science Journals Connector (OSTI)

A generalization of the SU(2) spin systems on a lattice and their continuum limit to an arbitrary compact group G is discussed. The continuum limits are, in general, nonrelativistic ?-model-type field theories targeted on a homogeneous space G/H, where H contains the maximal torus of G. In the ferromagnetic case the equations of motion derived from our continuum Lagrangian generalize the Landau-Lifshitz equations with quadratic dispersion relation for small wave vectors. In the antiferromagnetic case the dispersion law is always linear in the long-wavelength limit. The models become relativistic only when G/H is a symmetric space. Also discussed are a generalization of the Holstein-Primakoff representation of the SU(N) algebra, the topological term, and the existence of the instanton-type solutions in the continuum limit of the antiferromagnetic systems.

S. Randjbar-Daemi; Abdus Salam; J. Strathdee

1993-08-01T23:59:59.000Z

206

Soya: a Programming Model and Runtime Environment for Component Composition using SSDL  

SciTech Connect

The SOAP Service Description Language (SSDL) is a SOAPcentric language for describing Web Service contracts. SSDL focuses on message abstraction as the building block for creating service-oriented applications and provides an extensible range of protocol frameworks that can be used to describe and formally model component composition based on Web Service interactions. Given its novel approach, implementing support for SSDL contracts presents interesting challenges to middleware developers. At one end of the spectrum, programming abstractions that support message-oriented designs need to be created. At the other end, new functionality and semantics must be added to existing SOAP engines. In this paper we explain how component developers can create message-oriented Web Service interfaces with contemporary tool support (specifically the Windows Communication Foundation) using SSDL. We show how SSDL can be used as an alternative and powerful metadata language natively alongside existing tooling without imposing additional burdens on application developers. Moreover, we describe the design and architecture of the Soya middleware which supports

Fornasier, Patrick; Webber, James; Gorton, Ian

2007-08-14T23:59:59.000Z

207

Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high-temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low-cost alloy may improve its resistance to such sulfidation attack, and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. During this period, we analyzed several coated and exposed samples of 409 steel by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX), and report on the findings of four samples: (1) Analysis of two porous coupons after exposure to the porous metal particulate filter of the coal gasification power plant at 370 C for 2140 hours revealed that corrosion takes place in the bulk of the sample while the most external zone surface survived the test. (2) Coating and characterization of several porous 409 steel coupons after being coated with nitrides of Ti, Al and/or Si showed that adjusting experimental conditions results in thicker coatings in the bulk of the sample. (3) Analysis of coupons exposed to simulated coal gas at 370 C for 300 hours showed that a better corrosion resistance is achieved by improving the coatings in the bulk of the samples.

Gopala N. Krishnan; Ripudaman Malhotra; Esperanza Alvarez; Kai-Hung Lau; Jordi Perez-Mariano; Angel Sanjurjo

2006-12-31T23:59:59.000Z

208

Natural phenomena hazards performance categorization guidelines for structures, systems, and components  

SciTech Connect

The Department of Energy (DOE) requires in DOE 5480.23 the use of a ``graded approach`` in performing safety analysis and evaluation of DOE facilities for normal operating and accident conditions, including accidents caused by natural phenomena hazard (NPH) events. DOE 5480.28 uses this graded approach and requires, for the purpose of NPH design and evaluation, placing the structures, systems, and components (SSCs) comprising the DOE facilities into five performance categories. This standard is a revision to DOE-STD-1021-92, December 1992, and provides guidelines to be used for such categorization of SSCs, and recommends systematic procedures to implement these guidelines. It applies to all DOE facilities that are covered by DOE 5480.28. (JDB)

Not Available

1993-07-01T23:59:59.000Z

209

Natural phenomena hazards performance categorization guidelines for structures, systems, and components  

SciTech Connect

The Department of Energy (DOE) requires in DOE 5480.23 the use of a graded approach'' in performing safety analysis and evaluation of DOE facilities for normal operating and accident conditions, including accidents caused by natural phenomena hazard (NPH) events. DOE 5480.28 uses this graded approach and requires, for the purpose of NPH design and evaluation, placing the structures, systems, and components (SSCs) comprising the DOE facilities into five performance categories. This standard is a revision to DOE-STD-1021-92, December 1992, and provides guidelines to be used for such categorization of SSCs, and recommends systematic procedures to implement these guidelines. It applies to all DOE facilities that are covered by DOE 5480.28. (JDB)

Not Available

1993-07-01T23:59:59.000Z

210

Natural Phenomena Hazards Performance Categorization Guidelines for Structures, Systems, and Components  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1-93 1-93 July 1993 Change Notice No. 1 January 1996 Reaffirmed with Errata April 2002 DOE STANDARD NATURAL PHENOMENA HAZARDS PERFORMANCE CATEGORIZATION GUIDELINES FOR STRUCTURES, SYSTEMS, AND COMPONENTS U.S. Department of Energy AREA FACR Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced from the best available copy. Available to DOE and DOE contractors from ES&H Technical Information Services, U.S. Department of Energy, (800) 473-4375, fax: (301) 903-9823. Available to the public from the U.S. Department of Commerce, Technology Administration, National Technical Information Service, Springfield, VA 22161; (703) 605-6000. DOE-STD-1021-93 ERRATA FOR DOE-STD-1021-93 ADDED REFERENCE TO 10 CFR PART 830

211

Detailed modeling of the evaporation and thermal decomposition of urea-water-solution in SCR systems  

E-Print Network (OSTI)

Detailed modeling of the evaporation and thermal decomposition of urea-water-solution in SCRE Journal. Keywords: Multi-component, , evaporation, UWS, Adbue, urea decomposition, thermolysis SCR Catalytic Reduction (SCR) systems. In the multi-component evaporation model, the influence of urea

Boyer, Edmond

212

Natural phenomena hazards performance categorization criteria for structures, systems, and components. [Contains references  

SciTech Connect

Department of Energy (DOE) requires in DOE 5480.23 the use of a graded approach'' in performing safety analysis and evaluation of DOE facilities for normal operating and accident conditions, including accidents caused by natural phenomena hazard (NPH) events. DOE 5480.28 uses this graded approach'' and requires, for the purpose of NPH design and evaluation, placing the structures, systems, and components (SSCS) comprising the DOE facilities into five performance categories. This Standard provides the criteria to be used for such categorization of SSCs, and recommends systematic procedures to implement these criteria. It applies to all DOE facilities that are covered by DOE 5480.28. Basic categorization criteria have been provided to determine the preliminary performance category of SSCS. These criteria are based on the system safety classification and hazard categorization/classification data obtained from the application of DOE 5480.23, DOE-STD-1027-92, and the general design criteria (DOE 6430.1B) and safety design criteria (DOE 5480.30 and 5480.NNFDC) documents (these documents are under development). The final performance category is then determined considering applicable system interaction.

Not Available

1992-12-01T23:59:59.000Z

213

Models used to assess the performance of photovoltaic systems.  

SciTech Connect

This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization. Energy storage plays an important role in reducing PV intermittency and battery storage models are used to understand the best configurations and technologies to store PV generated electricity. Other researcher's models used by SNL are discussed including some widely known models that incorporate algorithms developed at SNL. There are other models included in the discussion that are not used by or were not adopted from SNL research but may provide some benefit to researchers working on PV array performance, hybrid system models and energy storage. The paper is organized into three sections to describe the different software models as applied to photovoltaic performance, hybrid systems, and battery storage. For each model, there is a description which includes where to find the model, whether it is currently maintained and any references that may be available. Modeling improvements underway at SNL include quantifying the uncertainty of individual system components, the overall uncertainty in modeled vs. measured results and modeling large PV systems. SNL is also conducting research into the overall reliability of PV systems.

Stein, Joshua S.; Klise, Geoffrey T.

2009-12-01T23:59:59.000Z

214

Stack Components  

NLE Websites -- All DOE Office Websites (Extended Search)

Stack Components Stack Components Nancy L. Garland Energy Efficiency and Renewable Energy Hydrogen, Fuel Cells and Infrastructure Technologies Program Fuel Cell Team FORS 5G-086 (202) 586-5673 nancy.garland@ee.doe.gov Stack Components F u e l P r o c e s s o r Bipolar Plate Cathode + Anode - Electrolyte H+ H+ HYDROGEN OXYGEN Example shown is for acidic electrolytes Bipolar Plate e - e - O 2 O 2 O 2 e - H+ Bipolar Plate Bipolar Plate Cathode + Anode - Electrolyte H+ H+ H+ H+ HYDROGEN OXYGEN Example shown is for acidic electrolytes Bipolar Plate Bipolar Plate e - e - e - e - O 2 O 2 O 2 O 2 O 2 O 2 e - e - H+ H+ Power Stack Component Barriers $10 Other Bipolar Plates Membranes Electrodes $25 $5 $5 Fuel Cell Power Systems $45/kW BARRIERS * Stack material cost/manufacturing * Durability * Electrode performance * Thermal and water management Stack Component Targets

215

Three-body recombination of two-component cold atomic gases into deep dimers in an optical model  

E-Print Network (OSTI)

We consider three-body recombination into deep dimers in a mass-imbalanced two-component atomic gas. We use an optical model where a phenomenological imaginary potential is added to the lowest adiabatic hyper-spherical potential. The consequent imaginary part of the energy eigenvalue corresponds to the decay rate or recombination probability of the three-body system. The method is formulated in details and the relevant qualitative features are discussed as functions of scattering lengths and masses. We use zero-range model in analyses of recent recombination data. The dominating scattering length is usually related to the non-equal two-body systems. We account for temperature smearing which tends to wipe out the higher-lying Efimov peaks. The range and the strength of the imaginary potential determine positions and shapes of the Efimov peaks as well as the absolute value of the recombination rate. The Efimov scaling between recombination peaks is calculated and shown to depend on both scattering lengths. Reco...

Mikkelsen, M; Fedorov, D V; Zinner, N T

2015-01-01T23:59:59.000Z

216

Natural gas transmission and distribution model of the National Energy Modeling System  

SciTech Connect

The Natural Gas Transmission and Distribution Model (NGTDM) is the component of the National Energy Modeling System (NEMS) that is used to represent the domestic natural gas transmission and distribution system. NEMS was developed in the Office of Integrated Analysis and Forecasting of the Energy Information Administration (EIA). NEMS is the third in a series of computer-based, midterm energy modeling systems used since 1974 by the EIA and its predecessor, the Federal Energy Administration, to analyze domestic energy-economy markets and develop projections. From 1982 through 1993, the Intermediate Future Forecasting System (IFFS) was used by the EIA for its analyses, and the Gas Analysis Modeling System (GAMS) was used within IFFS to represent natural gas markets. Prior to 1982, the Midterm Energy Forecasting System (MEFS), also referred to as the Project Independence Evaluation System (PIES), was employed. NEMS was developed to enhance and update EIA`s modeling capability by internally incorporating models of energy markets that had previously been analyzed off-line. In addition, greater structural detail in NEMS permits the analysis of a broader range of energy issues. The time horizon of NEMS is the midterm period (i.e., through 2015). In order to represent the regional differences in energy markets, the component models of NEMS function at regional levels appropriate for the markets represented, with subsequent aggregation/disaggregation to the Census Division level for reporting purposes.

NONE

1997-02-01T23:59:59.000Z

217

The split system approach to managing time in simulations of hybrid systems having continuous and discrete event components  

SciTech Connect

The efficient and accurate management of time in simulations of hybrid models is an outstanding engineering problem. General a priori knowledge about the dynamic behavior of the hybrid system (i.e. essentially continuous, essentially discrete, or 'truly hybrid') facilitates this task. Indeed, for essentially discrete and essentially continuous systems, existing software packages can be conveniently used to perform quite sophisticated and satisfactory simulations. The situation is different for 'truly hybrid' systems, for which direct application of existing software packages results in a lengthy design process, cumbersome software assemblies, inaccurate results, or some combination of these independent of the designer's a priori knowledge about the system's structure and behavior. The main goal of this paper is to provide a methodology whereby simulation designers can use a priori knowledge about the hybrid model's structure to build a straightforward, efficient, and accurate simulator with existing software packages. The proposed methodology is based on a formal decomposition and re-articulation of the hybrid system; this is the main theoretical result of the paper. To set the result in the right perspective, we briefly review the essentially continuous and essentially discrete approaches, which are illustrated with typical examples. Then we present our new, split system approach, first in a general formal context, then in three more specific guises that reflect the viewpoints of three main communities of hybrid system researchers and practitioners. For each of these variants we indicate an implementation path. Our approach is illustrated with an archetypal problem of power grid control.

Nutaro, James J [ORNL; Kuruganti, Phani Teja [ORNL; Protopopescu, Vladimir A [ORNL; Shankar, Mallikarjun [ORNL

2012-01-01T23:59:59.000Z

218

Object Model as the Basis of the Information Technology of Designing Complex Socio-Economic Systems  

Science Journals Connector (OSTI)

A method of modeling complex socio-economic systems based on the object-oriented approach is considered. The method is the basis for the information technology of design and allows creating a hierarchical model of a complex system. The results of applying ... Keywords: functional relations, hierarchy of components, object-oriented model, technology of design

M. P. Silich

2005-09-01T23:59:59.000Z

219

Integration of EBS Models with Generic Disposal System Models | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integration of EBS Models with Generic Disposal System Models Integration of EBS Models with Generic Disposal System Models Integration of EBS Models with Generic Disposal System Models This report summarizes research activities on engineered barrier system (EBS) model integration with the generic disposal system model (GDSM), and used fuel degradation and radionuclide mobilization (RM) in support of the EBS evaluation and tool development within the Used Fuel Disposition campaign. This report addresses: predictive model capability for used nuclear fuel degradation based on electrochemical and thermodynamic principles, radiolysis model to evaluate the U(VI)-H2O-CO2 system, steps towards the evaluation of uranium alteration products, discussion of instant release fraction (IRF) of radionuclides from the nuclear fuel, and

220

Integration of EBS Models with Generic Disposal System Models | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integration of EBS Models with Generic Disposal System Models Integration of EBS Models with Generic Disposal System Models Integration of EBS Models with Generic Disposal System Models This report summarizes research activities on engineered barrier system (EBS) model integration with the generic disposal system model (GDSM), and used fuel degradation and radionuclide mobilization (RM) in support of the EBS evaluation and tool development within the Used Fuel Disposition campaign. This report addresses: predictive model capability for used nuclear fuel degradation based on electrochemical and thermodynamic principles, radiolysis model to evaluate the U(VI)-H2O-CO2 system, steps towards the evaluation of uranium alteration products, discussion of instant release fraction (IRF) of radionuclides from the nuclear fuel, and

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Stochastic Modeling of a Power-Managed System: Construction and Optimization Qinru Qiu, Qing Wu and Massoud Pedram  

E-Print Network (OSTI)

1 Stochastic Modeling of a Power-Managed System: Construction and Optimization Qinru Qiu, Qing Wu of a power-managed electronic system. We formulate the problem of system-level power management-digital components. Dynamic power management ­ which refers to selective shut-off or slow-down of system components

Qiu, Qinru

222

NUCLEAR ENERGY SYSTEM COST MODELING  

SciTech Connect

The U.S. Department of Energys Fuel Cycle Technologies (FCT) Program is preparing to perform an evaluation of the full range of possible Nuclear Energy Systems (NES) in 2013. These include all practical combinations of fuels and transmuters (reactors and sub-critical systems) in single and multi-tier combinations of burners and breeders with no, partial, and full recycle. As part of this evaluation, Levelized Cost of Electricity at Equilibrium (LCAE) ranges for each representative system will be calculated. To facilitate the cost analyses, the 2009 Advanced Fuel Cycle Cost Basis Report is being amended to provide up-to-date cost data for each step in the fuel cycle, and a new analysis tool, NE-COST, has been developed. This paper explains the innovative Island approach used by NE-COST to streamline and simplify the economic analysis effort and provides examples of LCAE costs generated. The Island approach treats each transmuter (or target burner) and the associated fuel cycle facilities as a separate analysis module, allowing reuse of modules that appear frequently in the NES options list. For example, a number of options to be screened will include a once-through uranium oxide (UOX) fueled light water reactor (LWR). The UOX LWR may be standalone, or may be the first stage in a multi-stage system. Using the Island approach, the UOX LWR only needs to be modeled once and the module can then be reused on subsequent fuel cycles. NE-COST models the unit operations and life cycle costs associated with each step of the fuel cycle on each island. This includes three front-end options for supplying feedstock to fuel fabrication (mining/enrichment, reprocessing of used fuel from another island, and/or reprocessing of this islands used fuel), along with the transmuter and back-end storage/disposal. Results of each island are combined based on the fractional energy generated by each islands in an equilibrium system. The cost analyses use the probability distributions of key parameters and employs Monte Carlo sampling to arrive at an islands cost probability density function (PDF). When comparing two NES to determine delta cost, strongly correlated parameters can be cancelled out so that only the differences in the systems contribute to the relative cost PDFs. For example, one comparative analysis presented in the paper is a single stage LWR-UOX system versus a two-stage LWR-UOX to LWR-MOX system. In this case, the first stage of both systems is the same (but with different fractional energy generation), while the second stage of the UOX to MOX system uses the same type transmuter but the fuel type and feedstock sources are different. In this case, the cost difference between systems is driven by only the fuel cycle differences of the MOX stage.

Francesco Ganda; Brent Dixon

2012-09-01T23:59:59.000Z

223

ANALYSIS OF THE SHEAR BEHAVIOR OF RAIL PAD ASSEMBLIES AS A COMPONENT OF THE CONCRETE SLEEPER FASTENING SYSTEM  

E-Print Network (OSTI)

Fastening System RAIL PAD ASSEMBLY LATERAL DISPLACEMENT FAILURE MODE AND EFFECT ANALYSIS (FMEA) INTRODUCTION life · FMEA is used to define, identify, evaluate and eliminate potential failures from the system · FMEA was used to guide the process of answering questions related to the component behavior and also

Barkan, Christopher P.L.

224

Modeling the Earth System, volume 3  

SciTech Connect

The topics covered fall under the following headings: critical gaps in the Earth system conceptual framework; development needs for simplified models; and validating Earth system models and their subcomponents.

Ojima, D.

1992-01-01T23:59:59.000Z

225

National Energy Modeling System (NEMS)  

DOE Data Explorer (OSTI)

The National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of U.S. through 2030. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. NEMS was designed and implemented by the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE). NEMS can be used to analyze the effects of existing and proposed government laws and regulations related to energy production and use; the potential impact of new and advanced energy production, conversion, and consumption technologies; the impact and cost of greenhouse gas control; the impact of increased use of renewable energy sources; and the potential savings from increased efficiency of energy use; and the impact of regulations on the use of alternative or reformulated fuels. NEMS has also been used for a number of special analyses at the request of the Administration, U.S. Congress, other offices of DOE and other government agencies, who specify the scenarios and assumptions for the analysis. Modules allow analyses to be conducted in energy topic areas such as residential demand, industrial demand, electricity market, oil and gas supply, renewable fuels, etc.

226

Model Development Development of a system emulating the global carbon cycle in Earth system models  

E-Print Network (OSTI)

developed a loosely coupled model (LCM) which can represent the outputs of a GCMbased Earth system model

K. Tachiiri; J. C. Hargreaves; J. D. Annan; A. Oka; A. Abe-ouchi; M. Kawamiya

2010-01-01T23:59:59.000Z

227

Model documentation renewable fuels module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach, and design of the National Energy Modeling System (NEMS) Renewable Fuels Module (RFM) as it relates to the production of the 1997 Annual Energy Outlook forecasts. The report catalogues and describes modeling assumptions, computational methodologies, data inputs. and parameter estimation techniques. A number of offline analyses used in lieu of RFM modeling components are also described. This documentation report serves three purposes. First, it is a reference document for model analysts, model users, and the public interested in the construction and application of the RFM. Second, it meets the legal requirement of the Energy Information Administration (EIA) to provide adequate documentation in support of its models. Finally, such documentation facilitates continuity in EIA model development by providing information sufficient to perform model enhancements and data updates as part of EIA`s ongoing mission to provide analytical and forecasting information systems.

NONE

1997-04-01T23:59:59.000Z

228

Using the Model Coupling Toolkit to couple earth system models  

Science Journals Connector (OSTI)

Continued advances in computational resources are providing the opportunity to operate more sophisticated numerical models. Additionally, there is an increasing demand for multidisciplinary studies that include interactions between different physical processes. Therefore there is a strong desire to develop coupled modeling systems that utilize existing models and allow efficient data exchange and model control. The basic system would entail model 1 running on M processors and model 2 running on N processors, with efficient exchange of model fields at predetermined synchronization intervals. Here we demonstrate two coupled systems: the coupling of the ocean circulation model Regional Ocean Modeling System (ROMS) to the surface wave model Simulating \\{WAves\\} Nearshore (SWAN), and the coupling of ROMS to the atmospheric model Coupled Ocean Atmosphere Prediction System (COAMPS). Both coupled systems use the Model Coupling Toolkit (MCT) as a mechanism for operation control and inter-model distributed memory transfer of model variables. In this paper we describe requirements and other options for model coupling, explain the MCT library, ROMS, SWAN and COAMPS models, methods for grid decomposition and sparse matrix interpolation, and provide an example from each coupled system. Methods presented in this paper are clearly applicable for coupling of other types of models.

John C. Warner; Natalie Perlin; Eric D. Skyllingstad

2008-01-01T23:59:59.000Z

229

Indigenous climate knowledge in southern Uganda: the multiple components of a dynamic regional system  

E-Print Network (OSTI)

knowledge in southern Uganda: the multiple components of aAbstract Farmers in southern Uganda seek information toMakerere University, Kampala, Uganda A. Majugu Department of

Orlove, Ben; Roncoli, Carla; Kabugo, Merit; Majugu, Abushen

2010-01-01T23:59:59.000Z

230

Modeling and validation of a boost pressure actuation system, for a series sequentially turbocharged SI engine  

Science Journals Connector (OSTI)

An actuation system for flexible control of an advanced turbocharging system is studied. It incorporates a vacuum pump and tank that are connected to pulse width modulation controlled vacuum valves. A methodology for modeling the entire boost pressure actuation system is developed. Emphasis is placed on developing component models that are easily identified from measured data, without the need for expensive measurements.The models have physical interpretations that enable handling of varying surrounding conditions.The component models and integrated system are evaluated on a two stage series sequential turbo system with three actuators having different characteristics.Several applications of the developed system model are presented, including a nonlinear compensator for voltage disturbance rejection where the performance of the compensator is demonstrated on an engine in a test cell. The applicability of the complete system model for control and diagnosis of the vacuum system is also discussed.

Andreas Thomasson; Oskar Leufvn; Ivan Criscuolo; Lars Eriksson

2013-01-01T23:59:59.000Z

231

Integrating Program Component Executables  

NLE Websites -- All DOE Office Websites (Extended Search)

Integrating Integrating Program Component Executables on Distributed Memory Architectures via MPH Chris Ding and Yun He Computational Research Division, Lawrence Berkeley National Laboratory University of California, Berkeley, CA 94720, USA chqding@lbl.gov, yhe@lbl.gov Abstract A growing trend in developing large and complex ap- plications on today's Teraflop computers is to integrate stand-alone and/or semi-independent program components into a comprehensive simulation package. One example is the climate system model which consists of atmosphere, ocean, land-surface and sea-ice. Each component is semi- independent and has been developed at different institu- tions. We study how this multi-component multi-executable application can run effectively on distributed memory archi- tectures. We identify five effective execution modes and de- velop the MPH library to support

232

Model Transformation for Cyber Physical Systems  

Science Journals Connector (OSTI)

Cyber Physical Systems(CPS) are composed with discrete and continuous dynamics. Traditional modeling techniques cant implement the requirement of modeling CPS. One way of solving this is to model CPS parts wi...

Shuguang Feng; Lichen Zhang

2014-01-01T23:59:59.000Z

233

Surface Decontamination of System Components in Uranium Conversion Plant at KAERI  

SciTech Connect

A chemical decontamination process using nitric acid solution was selected as in-situ technology for recycle or release with authorization of a large amount of metallic waste including process system components such as tanks, piping, etc., which is generated by dismantling a retired uranium conversion plant at Korea Atomic Energy Research Institute (KAERI). The applicability of nitric acid solution for surface decontamination of metallic wastes contaminated with uranium compounds was evaluated through the basic research on the dissolution of UO2 and ammonium uranyl carbonate (AUC) powder. Decontamination performance was verified by using the specimens contaminated with such uranium compounds as UO2 and AUC taken from the uranium conversion plant. Dissolution rate of UO2 powder is notably enhanced by the addition of H2O2 as an oxidant even in the condition of a low concentration of nitric acid and low temperature compared with those in a nitric acid solution without H2O2. AUC powders dissolve easily in nitric acid solutions until the solution pH attains about 2.5 {approx} 3. Above that solution pH, however, the uranium concentration in the solution is lowered drastically by precipitation as a form of U3(NH3)4O9 . 5H2O. Decontamination performance tests for the specimens contaminated with UO2 and AUC were quite successful with the application of decontamination conditions obtained through the basic studies on the dissolution of UO2 and AUC powders.

Choi, W. K.; Kim, K. N.; Won, H. J.; Jung, C. H.; Oh, W. Z.

2003-02-25T23:59:59.000Z

234

Model documentation report: Industrial sector demand module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach, and development of the National Energy Modeling System (NEMS) Industrial Demand Model. The report catalogues and describes model assumptions, computational methodology, parameter estimation techniques, and model source code. This document serves three purposes. First, it is a reference document providing a detailed description of the NEMS Industrial Model for model analysts, users, and the public. Second, this report meets the legal requirement of the Energy Information Administration (EIA) to provide adequate documentation in support of its models. Third, it facilitates continuity in model development by providing documentation from which energy analysts can undertake model enhancements, data updates, and parameter refinements as future projects. The NEMS Industrial Demand Model is a dynamic accounting model, bringing together the disparate industries and uses of energy in those industries, and putting them together in an understandable and cohesive framework. The Industrial Model generates mid-term (up to the year 2015) forecasts of industrial sector energy demand as a component of the NEMS integrated forecasting system. From the NEMS system, the Industrial Model receives fuel prices, employment data, and the value of industrial output. Based on the values of these variables, the Industrial Model passes back to the NEMS system estimates of consumption by fuel types.

NONE

1997-01-01T23:59:59.000Z

235

Infrared systems and components III: Proceedings of the Meeting, Los Angeles, CA, Jan. 16, 17, 1989  

SciTech Connect

Topics presented include infrared signal processing and automatic target recognition, detection of closely spaced objects using radial variance, the U.S. Army FLIR/ATR evolution path, and classifiability of IR target signatures. Also presented are infrared sensors and detectors, spectral agility, Bayesian analysis of signals from closely spaced objects, and enhanced atmospheric models for IR image simulation. Consideration is given to calibration and testing of infrared sensors, electrooptical-detector laser susceptibility testing, the performance of a thermal scene generator, optics and thin films in the infrared, the optical performance of replica beryllium mirrors, a high-speed video data acquisition system, and antireflection coatings for germanium without zinc.

Caswell, R.L.

1989-01-01T23:59:59.000Z

236

Use of Federated Object Modeling to Develop a Macro-System Model for the U.S. Department of Energy's Hydrogen Program; Preprint  

SciTech Connect

DOE is working on changing transportation fuel to hydrogen. To assist in that effort, we are developing a macro-system model that will link existing or developmental component models together.

Ruth, M. F.; Vanderveen, K. B.; Sa, T. J.

2006-07-01T23:59:59.000Z

237

Forecasting GHG emissions using an optimized artificial neural network model based on correlation and principal component analysis  

Science Journals Connector (OSTI)

Abstract The prediction of GHG emissions is very important due to their negative impacts on climate and global warming. The aim of this study was to develop a model for GHG forecasting emissions at the national level using a new approach based on artificial neural networks (ANN) and broadly available sustainability, economical and industrial indicators acting as inputs. The ANN model architecture and training parameters were optimized, with inputs being selected using correlation analysis and principal component analysis. The developed ANN models were compared with the corresponding multiple linear regression (MLR) model, while an ANN model created using transformed inputs (principal components) was compared with a principal component regression (PCR) model. Since the best results were obtained with the ANN model based on correlation analysis, that particular model was selected for the actual 2011 GHG emissions forecasting. The relative errors of the 2010 GHG emissions predictions were used to adjust the ANN model predictions for 2011, which subsequently resulted in the adjusted 2011 predictions having a MAPE value of only 3.60%. Sensitivity analysis showed that gross inland energy consumption had the highest sensitivity to GHG emissions.

Davor Z. Antanasijevi?; Mirjana ?. Risti?; Aleksandra A. Peri?-Gruji?; Viktor V. Pocajt

2014-01-01T23:59:59.000Z

238

The National Energy Modeling System: An Overview 2000 - Introduction  

Gasoline and Diesel Fuel Update (EIA)

National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of U.S. energy markets for the midterm period through 2020. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. NEMS was designed and implemented by the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE). National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of U.S. energy markets for the midterm period through 2020. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. NEMS was designed and implemented by the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE). The National Energy Modeling System: An Overview presents an overview of the structure and methodology of NEMS and each of its components. This chapter provides a description of the design and objectives of the system, followed by a chapter on the overall modeling structure and solution algorithm. The remainder of the report summarizes the methodology and scope of the component modules of NEMS. The model descriptions are intended for readers familiar with terminology from economics, operations research, and energy modeling. More detailed model documentation reports for all the NEMS modules are also available from EIA (Appendix, “Bibliography”).

239

Development and application of earth system models  

E-Print Network (OSTI)

Development and application of earth system models Ronald G. Prinn *Reprinted from Proceedings, 2011) The global environment is a complex and dynamic system. Earth system modeling is needed to help: globalchange@mit.edu Website: http://globalchange.mit.edu/ #12;Development and application of earth system

240

Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems  

SciTech Connect

Advanced electric power generation systems use a coal gasifier to convert coal to a gas rich in fuels such as H{sub 2} and CO. The gas stream contains impurities such as H{sub 2}S and HCl, which attack metal components of the coal gas train, causing plant downtime and increasing the cost of power generation. Corrosion-resistant coatings would improve plant availability and decrease maintenance costs, thus allowing the environmentally superior integrated-gasification-combined-cycle (IGCC) plants to be more competitive with standard power-generation technologies. Heat-exchangers, particle filters, turbines, and other components in the IGCC system must withstand the highly sulfiding conditions of the high-temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low cost alloy will improve is resistance to such sulfidation attack and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. The Fe- and Ni-based high-temperature alloys are susceptible to sulfidation attack unless they are fortified with high levels of Cr, Al, and Si. To impart corrosion resistance, these elements need not be in the bulk of the alloy and need only be present at the surface layers. In this study, the use of corrosion-resistant coatings on low alloy steels was investigated for use as high-temperature components in IGCC systems. The coatings were deposited using SRI's fluidized-bed reactor chemical vapor deposition technique. Diffusion coatings of Cr and Al were deposited by this method on to dense and porous, low alloy stainless steel substrates. Bench-scale exposure tests at 900 C with a simulated coal gas stream containing 1.7% H{sub 2}S showed that the low alloy steels such SS405 and SS409 coated with {approx}20%Cr and Al each can be resistant to sulfidation attack for 500 h. However, exposure to an actual coal gasifier gas stream at the Wabash River gasifier facility for 1000 h in the temperature range 900 to 950 C indicated that Cr and Al present in the coating diffused further into the substrate decreasing the protective ability of these elements against attack by H{sub 2}S. Similarly, adherent multilayer coatings containing Si, Ti, Al, and Nb were also deposited with subsequent nitridation of these elements to increase the corrosion resistance. Both dense and porous SS409 or SS 410 alloy substrates were coated by using this method. Multilayer coatings containing Ti-Al-Si nitrides along with a diffusion barrier of Nb were deposited on SS410 and they were found also to be resistant to sulfidation attack in the bench scale tests at 900 C. However, they were corroded during exposure to the actual coal gasifier stream at the Wabash River gasifier facility for 1000 h. The Cr/Al coatings deposited inside a porous substrate was found to be resistant to sulfidation attack in the bench-scale simulated tests at 370 C. The long-term exposure test at the Wabash River gasifier facility at 370 C for 2100 h showed that only a minor sulfidation attack occurred inside the porous SS 409 alloy coupons that contained Cr and Al diffusion coatings. This attack can be prevented by improving the coating process to deposit uniform coatings at the interior of the porous structure. It is recommended that additional studies be initiated to optimize the FBR-CVD process to deposit diffusion coatings of the corrosion resistant elements such as Cr, Al, and Ti inside porous metal filters to increase their corrosion resistance. Long-term exposure tests using an actual gas stream from an operating gasifier need to be conducted to determine the suitability of the coatings for use in the gasifier environment.

Gopala N. Krishnan; Ripudaman Malhotra; Jordi Perez; Marc Hornbostel; Kai-Hung Lau; Angel Sanjurjo

2007-05-31T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Integrated Hydrogen Storage System Model  

NLE Websites -- All DOE Office Websites (Extended Search)

WSRC-TR-2007-00440, REVISION 0 WSRC-TR-2007-00440, REVISION 0 Keywords: Hydrogen Kinetics, Hydrogen Storage Vessel Metal Hydride Retention: Permanent Integrated Hydrogen Storage System Model Bruce J. Hardy November 16, 2007 Washington Savannah River Company Savannah River Site Aiken, SC 29808 Prepared for the U.S. Department of Energy Under Contract Number DEAC09-96-SR18500 DISCLAIMER This report was prepared for the United States Department of Energy under Contract No. DE-AC09-96SR18500 and is an account of work performed under that contract. Neither the United States Department of Energy, nor WSRC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for accuracy, completeness, or usefulness, of any information,

242

EIA - The National Energy Modeling System: An Overview 2003 - Preface  

Gasoline and Diesel Fuel Update (EIA)

Preface Preface The National Energy Modeling System: An Overview 2003 Preface The National Energy Modeling System: An Overview 2003 provides a summary description of the National Energy Modeling System (NEMS), which was used to generate the forecasts of energy production, demand, imports, and prices through the year 2025 for the Annual Energy Outlook 2003 (AEO2003), (DOE/EIA-0383(2003)), released in January 2003. AEO2003 presents national forecasts of energy markets for five primary cases—a reference case and four additional cases that assume higher and lower economic growth and higher and lower world oil prices than in the reference case. The Overview presents a brief description of the methodology and scope of each of the component modules of NEMS. The model documentation reports listed in the appendix of this document provide further details.

243

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

Expander Models The components that generate power from steam expansion can be classified into two categories: turbo-

Luong, David

2013-01-01T23:59:59.000Z

244

The evaluation of Earth System Models: discussion summary  

Science Journals Connector (OSTI)

Complex Earth system models, and their various sub-components, are not yet subject to rigorous evaluation against observations as much as they should be, despite the existence of hundreds of proposed diagnostics. A concerted process is urgently needed to make this the norm, not the exception. Earth Observation, field observations and palaeo data can be applied to contexts as diverse as wildfire, marine ecosystems, the land carbon cycle, and greenhouse gases. Model evaluation (by comparing models and benchmark data) and model weighting (defining the quality of models on the basis of such a comparison) should be considered as separate issues. Systematic approaches to parameter optimization, such as the adjoint technique, allow structural differences between models to be identified and limitations to be addressed. Such methods are established in atmospheric tracer transport and carbon cycling; research carried out in the QUEST programme has demonstrated their applicability for climate modelling. Although it is impossible to devise a foolproof metric for the ability of models to predict the future, relevant metrics could be based on their ability to simulate the past. Furthermore, it should be possible to extend parameter optimization techniques to assimilate data from the past. There are limits to what can be achieved by benchmarking against a mean state, when it is a change in state that is of greatest interest. It is useful to benchmark individual processes rather than aggregate properties. Coupling good components does not automatically result in a good Earth System model, so for complex models, a two-stage process is needed: first, benchmarking the components in stand-alone mode, and second, using the same benchmarks in coupled mode.

Snke Zaehle; Colin Prentice; Sarah Cornell

2011-01-01T23:59:59.000Z

245

Hybrid system modeling using the \\{SIMANLib\\} and \\{ARENALib\\} Modelica libraries  

Science Journals Connector (OSTI)

Abstract The \\{ARENALib\\} and \\{SIMANLib\\} Modelica libraries replicate the basic functionality of the Arena simulation environment and the SIMAN language. These libraries facilitate describing discrete-event models using the Arena modeling methodology. \\{ARENALib\\} and \\{SIMANLib\\} models can be combined with other Modelica models in order to describe complex hybrid systems (i.e., combined continuous-time and discrete-event systems). The implementation and design of \\{SIMANLib\\} and \\{ARENALib\\} is discussed. The \\{ARENALib\\} components have been built in a modular fashion using SIMANLib. The \\{SIMANLib\\} components have been described as Parallel DEVS models and implemented using DEVSLib, a Modelica library previously developed by the authors to support the Parallel DEVS formalism. The use of Parallel DEVS as underlying mathematical formalism has facilitated the development and maintenance of SIMANLib. The modeling of two hybrid systems is discussed to illustrate the features and use of \\{SIMANLib\\} and ARENALib: firstly, a soaking-pit furnace; secondly, the malaria spread and an emergency hospital. DEVSLib, \\{SIMANLib\\} and \\{ARENALib\\} can be freely downloaded from http://www.euclides.dia.uned.es/.

Victorino Sanz; Alfonso Urquia; Franois E. Cellier; Sebastian Dormido

2013-01-01T23:59:59.000Z

246

System Advisor Model (SAM) | Open Energy Information  

Open Energy Info (EERE)

System Advisor Model (SAM) System Advisor Model (SAM) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: System Advisor Model Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Geothermal, Solar, - Concentrating Solar Power, - Solar Hot Water, - Solar PV, Wind Phase: Evaluate Options, Develop Goals, Prepare a Plan Topics: Pathways analysis, Resource assessment Resource Type: Case studies/examples, Dataset, Guide/manual, Training materials, Software/modeling tools, Video User Interface: Desktop Application Website: sam.nrel.gov/ Web Application Link: sam.nrel.gov/ Cost: Free OpenEI Keyword(s): Featured, EERE tool, System Advisor Model, SAM Language: English System Advisor Model Screenshot References: SAM[1] System Advisor Model [2]

247

System Advisor Model (SAM) | Open Energy Information  

Open Energy Info (EERE)

System Advisor Model (SAM) System Advisor Model (SAM) (Redirected from System Advisor Model) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: System Advisor Model Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Geothermal, Solar, - Concentrating Solar Power, - Solar Hot Water, - Solar PV, Wind Phase: Evaluate Options, Develop Goals, Prepare a Plan Topics: Pathways analysis, Resource assessment Resource Type: Case studies/examples, Dataset, Guide/manual, Training materials, Software/modeling tools, Video User Interface: Desktop Application Website: sam.nrel.gov/ Web Application Link: sam.nrel.gov/ Cost: Free OpenEI Keyword(s): Featured, EERE tool, System Advisor Model, SAM Language: English System Advisor Model Screenshot

248

Inversion of Waveforms For Extreme Source Models With an Application to the Isotropic Moment Tensor Component  

Science Journals Connector (OSTI)

......component) in the source. Synthetic tests were used to examine the effect...structure of Silent Canyon caldera, Nevada Test Site, Bull. seism. Soc. Am., 77...structure of Silent Canyon caldera, Nevada Test Site, Bull. sebm. SOC. Am., 77......

D. W. Vasco; L. R. Johnson

1989-04-01T23:59:59.000Z

249

Principal Component Analysis of Observed and Modeled Diurnal Rainfall in the Maritime Continent  

Science Journals Connector (OSTI)

Principal component analysis (PCA) is able to diagnose the diurnal rain cycle in the Maritime Continent into two modes that explain most of the diurnal variability in the region. The first mode results from the differential variation in potential ...

Chee-Kiat Teo; Tieh-Yong Koh; Jeff Chun-Fung Lo; Bhuwan Chandra Bhatt

2011-09-01T23:59:59.000Z

250

Achieving Structural and Composable Modeling of Complex Systems David I. August Sharad Malik Li-Shiuan Peh  

E-Print Network (OSTI)

modeling system called the Liberty Simula- tion Environment (LSE). LSE automatically constructs sim for each project. Models of the same single component may be written many times to fit each simulation

251

Bifurcation Analysis of Various Power System Models  

E-Print Network (OSTI)

generator and transmission system. Di erent modeling levels with their respective di erential-algebraic equa, the generation or system loading levels are used as bifurcation parameters, which are varied slowly, moving erent induction motor load models are considered. The loads were modeled as constant, linear

Cañizares, Claudio A.

252

Abstract--Circuit breakers are crucial components for power system operation. The currently adapted time-directed  

E-Print Network (OSTI)

1 Abstract--Circuit breakers are crucial components for power system operation. The currently be This work was supported in part by Mitsubishi Electric Research Laboratories and PSerc consortium, an NSF I used to select the most appropriate maintenance strategy. During the maintenance or repair work

253

SYSTEM MODELING AND ANALYSIS USING COMMUNICATION CHANNELS  

Science Journals Connector (OSTI)

In this study, we approach systems from an information theoretical perspective. Specifically, we propose a framework to model systems by noisy communication channels and analyze them by this framework whose elements are commonly used analysis tools in ... Keywords: Analysis, Information Theory, Modeling, Systems

Bunyamin Ozaydin; Murat M. Tanik

2011-01-01T23:59:59.000Z

254

3.System Design Basis 2) MODELING  

E-Print Network (OSTI)

BOG compressors with butane storage system is modelled for this report. 4) Modelling have been storage system except heat load and this level of detail was not required for dynamic simulation.(Refe to table 4.3.1) #12;9) One butane separator, pump and control system for many butane tanks boil off

Hong, Deog Ki

255

Modeling the pneumatic subsystem of a S-cam air brake system  

E-Print Network (OSTI)

The air brake system is one of the critical components in ensuring the safe operation of any commercial vehicle. This work is directed towards the development of a fault-free model of the pneumatic subsystem of the air brake system. This model can...

Coimbatore Subramanian, Shankar

2004-09-30T23:59:59.000Z

256

Port-based modeling and simulation of mechanical systems with rigid and flexible links  

Science Journals Connector (OSTI)

In this paper, a systematic procedure for the definition of the dynamical model in port-Hamiltonian form of mechanical systems is presented as the result of the power-conserving interconnection of a set of basic components (rigid bodies, flexible links, ... Keywords: flexible mechanisms, mechanisms dynamics, modeling, port-Hamiltonian systems, simulation

Alessandro Macchelli; Claudio Melchiorri; Stefano Stramigioli

2009-10-01T23:59:59.000Z

257

THREE-DIMENSIONAL SOLAR WIND MODELING FROM THE SUN TO EARTH BY A SIP-CESE MHD MODEL WITH A SIX-COMPONENT GRID  

SciTech Connect

The objective of this paper is to explore the application of a six-component overset grid to solar wind simulation with a three-dimensional (3D) Solar-InterPlanetary Conservation Element/Solution Element MHD model. The essential focus of our numerical model is devoted to dealing with: (1) the singularity and mesh convergence near the poles via the use of the six-component grid system, (2) the {nabla} {center_dot} B constraint error via an easy-to-use cleaning procedure by a fast multigrid Poisson solver, (3) the Courant-Friedrichs-Levy number disparity via the Courant-number insensitive method, (4) the time integration by multiple time stepping, and (5) the time-dependent boundary condition at the subsonic region by limiting the mass flux escaping through the solar surface. In order to produce fast and slow plasma streams of the solar wind, we include the volumetric heating source terms and momentum addition by involving the topological effect of the magnetic field expansion factor f{sub S} and the minimum angular distance {theta}{sub b} (at the photosphere) between an open field foot point and its nearest coronal hole boundary. These considerations can help us easily code the existing program, conveniently carry out the parallel implementation, efficiently shorten the computation time, greatly enhance the accuracy of the numerical solution, and reasonably produce the structured solar wind. The numerical study for the 3D steady-state background solar wind during Carrington rotation 1911 from the Sun to Earth is chosen to show the above-mentioned merits. Our numerical results have demonstrated overall good agreements in the solar corona with the Large Angle and Spectrometric Coronagraph on board the Solar and Heliospheric Observatory satellite and at 1 AU with WIND observations.

Feng Xueshang; Yang Liping; Xiang Changqing; Zhou Yufen; Zhong Dingkun [SIGMA Weather Group, State Key Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190 (China); Wu, S. T., E-mail: fengx@spaceweather.ac.c [Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, Huntsville, AL 35899 (United States)

2010-11-01T23:59:59.000Z

258

System Advisor Model (SAM) | Open Energy Information  

Open Energy Info (EERE)

System Advisor Model (SAM) System Advisor Model (SAM) (Redirected from Solar Advisor Model) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: System Advisor Model Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Geothermal, Solar, - Concentrating Solar Power, - Solar Hot Water, - Solar PV, Wind Phase: Evaluate Options, Develop Goals, Prepare a Plan Topics: Pathways analysis, Resource assessment Resource Type: Case studies/examples, Dataset, Guide/manual, Training materials, Software/modeling tools, Video User Interface: Desktop Application Website: sam.nrel.gov/ Web Application Link: sam.nrel.gov/ Cost: Free OpenEI Keyword(s): Featured, EERE tool, System Advisor Model, SAM Language: English System Advisor Model Screenshot

259

A Robust Model Control for Dynamic Systems  

Science Journals Connector (OSTI)

Analytical methods of polynomial algebra, heuristic techniques, and digital modeling are used to study the robustness domain of linear dynamic systems with model inputoutput controllers as a function of the mutual locations of zeros ...

S. V. Tararykin; V. V. Tyutikov

2002-05-01T23:59:59.000Z

260

High Flux Isotope Reactor system RELAP5 input model  

SciTech Connect

A thermal-hydraulic computational model of the High Flux Isotope Reactor (HFIR) has been developed using the RELAP5 program. The purpose of the model is to provide a state-of-the art thermal-hydraulic simulation tool for analyzing selected hypothetical accident scenarios for a revised HFIR Safety Analysis Report (SAR). The model includes (1) a detailed representation of the reactor core and other vessel components, (2) three heat exchanger/pump cells, (3) pressurizing pumps and letdown valves, and (4) secondary coolant system (with less detail than the primary system). Data from HFIR operation, component tests, tests in facility mockups and the HFIR, HFIR specific experiments, and other pertinent experiments performed independent of HFIR were used to construct the model and validate it to the extent permitted by the data. The detailed version of the model has been used to simulate loss-of-coolant accidents (LOCAs), while the abbreviated version has been developed for the operational transients that allow use of a less detailed nodalization. Analysis of station blackout with core long-term decay heat removal via natural convection has been performed using the core and vessel portions of the detailed model.

Morris, D.G.; Wendel, M.W.

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Development and Application of Earth System Models  

E-Print Network (OSTI)

The global environment is a complex and dynamic system. Earth system modeling is needed to help understand changes in interacting subsystems, elucidate the influence of human activities, and explore possible future changes. ...

Prinn, Ronald G.

262

Enhancements to Generic Disposal System Modeling Capabilities...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

disposal system modeling and analysis capability that takes advantage of high-performance computing (HPC) environments to simulate the important multi-physics phenomena and...

263

Topology-Based Vehicle Systems Modelling.  

E-Print Network (OSTI)

??The simulation tools that are used to model vehicle systems have not been advancing as quickly as the growth of research and technology surrounding the (more)

Yam, Edward

2013-01-01T23:59:59.000Z

264

Nuclear Systems Modeling, Simulation & Validation | Nuclear Science...  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Areas Fuel Cycle Science & Technology Fusion Nuclear Science Isotope Development and Production Nuclear Security Science & Technology Nuclear Systems Modeling, Simulation...

265

Structural basis for activation of the complement system by component C4 cleavage  

Science Journals Connector (OSTI)

...component C4 cleavage 10.1073/pnas.1208031109 Rune T. Kidmose Nick S. Laursen Jozsef Dobo Troels R. Kjaer Sofia Sirotkina Laure...anomalous diffraction phases from the Ta6Br12 derivative (figure of merit, 0.33; phasing power, 2.5) calculated with CNS (8...

Rune T. Kidmose; Nick S. Laursen; Jzsef Dob; Troels R. Kjaer; Sofia Sirotkina; Laure Yatime; Lars Sottrup-Jensen; Steffen Thiel; Pter Gl; Gregers R. Andersen

2012-01-01T23:59:59.000Z

266

Energy Department Announces $8 Million to Develop Advanced Components for Wave, Tidal, and Current Energy Systems  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced $8 million in available funding to spur innovation in next-generation marine and hydrokinetic control and component technologies. In the United States, waves, tides, and ocean currents represent a largely untapped renewable energy resource that could provide clean, affordable energy to homes and businesses across the country's coastal regions.

267

Modeling turbo-expander systems  

Science Journals Connector (OSTI)

Turbo-expander systems have long been used instead of regulators, but they have recently received attention as a driving medium for power electrical generators. These systems typically replace the regulator valves that reduce the gas pressure in gas ... Keywords: dispersed generation, turbo-expander systems, variable nozzle angle

Mehdi Taleshian Jelodar; Hasan Rastegar; Hossein Askarian Abyaneh

2013-02-01T23:59:59.000Z

268

System Advisor Model (SAM) | Open Energy Information  

Open Energy Info (EERE)

System Advisor Model (SAM) System Advisor Model (SAM) (Redirected from SAM) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: System Advisor Model Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Geothermal, Solar, - Concentrating Solar Power, - Solar Hot Water, - Solar PV, Wind Phase: Evaluate Options, Develop Goals, Prepare a Plan Topics: Pathways analysis, Resource assessment Resource Type: Case studies/examples, Dataset, Guide/manual, Training materials, Software/modeling tools, Video User Interface: Desktop Application Website: sam.nrel.gov/ Web Application Link: sam.nrel.gov/ Cost: Free OpenEI Keyword(s): Featured, EERE tool, System Advisor Model, SAM Language: English System Advisor Model Screenshot References: SAM[1]

269

Very Large System Dynamics Models - Lessons Learned  

SciTech Connect

This paper provides lessons learned from developing several large system dynamics (SD) models. System dynamics modeling practice emphasize the need to keep models small so that they are manageable and understandable. This practice is generally reasonable and prudent; however, there are times that large SD models are necessary. This paper outlines two large SD projects that were done at two Department of Energy National Laboratories, the Idaho National Laboratory and Sandia National Laboratories. This paper summarizes the models and then discusses some of the valuable lessons learned during these two modeling efforts.

Jacob J. Jacobson; Leonard Malczynski

2008-10-01T23:59:59.000Z

270

Evaluating runoff simulations from the Community Land Model 4.0 using observations from flux towers and a mountainous watershed  

E-Print Network (OSTI)

Land Model (CLM) is the land component within the Community Earth System Model (CESM) (formerly known earth system model b

271

Earth System Modeling -- Director`s initiative. LDRD Program final report  

SciTech Connect

The objective of the Earth System Modeling Director`s Initiative is to develop and test a framework for interactively coupling subsystem models that represent the physical, chemical, and biological processes which determine the state of the atmosphere, ocean, land surface and vegetation. Most studies of the potential for human perturbations of the climate system made previously have treated only limited components of the Earth system. The purpose of this project was to demonstrate the capability of coupling all relevant components in a flexible framework that will permit a wide variety of tests to be conducted to assure realistic interactions. A representation of the Earth system is shown and its important interactions.

MacCracken, M.; Penner, J. [Lawrence Livermore National Lab., CA (United States). Atmospheric Science Div.

1996-06-01T23:59:59.000Z

272

RF System Modeling for the CEBAF Energy Upgrade  

SciTech Connect

An RF system model, based on MATLAB/SIMULINK, has been developed for analyzing the basic characteristics of the low level RF (LLRF) control system being designed for the CEBAF 12 GeV Energy Upgrade. In our model, a typical passband cavity representation is simplified to in-phase and quadrature (I&Q) components. Lorentz Force and microphonic detuning are incorporated as a new quadrature carrier frequency (frequency modulation). Beam is also represented as in-phase and quadrature components and superpositioned with the cavity field vector. Signals pass through two low pass filters, where the cutoff frequency is equal to half of the cavity bandwidth, then they are demodulated using the same detuning frequency. Because only baseband I&Q signals are calculated, the simulation process is very fast when compared to other controller-cavity models. During the design process we successfully analyzed gain requirements vs. field stability for different superconducting cavity microphonic backgrounds and Lorentz Force coefficients. Moreover, we were able to evaluate different types of a LLRF systems control algorithm: GDR (Generator Driven Resonator) and SEL (Self Excited Loop) [1] as well as klystron power requirements for different cavities and beam loads.

Tomasz Plawski, J. Hovater

2009-05-01T23:59:59.000Z

273

Generic Model Host System Design  

SciTech Connect

There are many simulation codes for accelerator modelling; each one has some strength but not all. A platform which can host multiple modelling tools would be ideal for various purposes. The model platform along with infrastructure support can be used not only for online applications but also for offline purposes. Collaboration is formed for the effort of providing such a platform. In order to achieve such a platform, a set of common physics data structure has to be set. Application Programming Interface (API) for physics applications should also be defined within a model data provider. A preliminary platform design and prototype is discussed.

Chu, Chungming; /SLAC; Wu, Juhao; /SLAC; Qiang, Ji; /LBL, Berkeley; Shen, Guobao; /Brookhaven

2012-06-22T23:59:59.000Z

274

System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report  

SciTech Connect

The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

2013-12-01T23:59:59.000Z

275

Modeling Control Mechanisms with Normative Multiagent Systems  

E-Print Network (OSTI)

. This paper is about control mechanisms for virtual organizations. As a case study, we discuss the Renewables of renewable energy. We apply a conceptual model based on normative multiagent systems (NMAS). We proposeModeling Control Mechanisms with Normative Multiagent Systems: the Case of the Renewables

van der Torre, Leon

276

Addendum to "Lattice model for the screening potential of the classical one-component plasma"  

Science Journals Connector (OSTI)

An improvement upon Salpeter and Van Horn's relaxed-lattice model is made by taking into account the quadratic screening potential near zero separation. Implications of a recent experiment on dense plasmas are found to support the lattice model.

Naoki Itoh and Setsuo Ichimaru

1979-06-01T23:59:59.000Z

277

Experimental studies of irregular water wave component interactions with comparisons to the hybrid wave model  

E-Print Network (OSTI)

computed by Wheeler Stretching and Linear Extrapolation modifications to Linear Random Wave Theory and the Hybrid Wave Model. Extreme wave acceleration fields arc compared with Hybrid Wave Model acceleration fields only. Comparisons between measurements...

Longridge, Jonathon Kent

1993-01-01T23:59:59.000Z

278

The National Energy Modeling System: An Ocerview 2000 - Preface  

Gasoline and Diesel Fuel Update (EIA)

Preface Preface The National Energy Modeling System: An Overview provides a summary description of the National Energy Modeling System (NEMS), which was used to generate the forecasts of energy production, demand, imports, and prices through the year 2020 for the Annual Energy Outlook 2000 (AEO2000), (DOE/EIA-0383(2000)), released in November 1999. AEO2000 presents national forecasts of energy markets for five cases—a reference case and four additional cases that assume higher and lower economic growth and higher and lower world oil prices than in the reference case. The Overview presents a brief description of the methodology and scope of each of the component modules of NEMS. The model documentation reports listed in the appendix of this document provide further details.

279

Remote information service access system based on a client-server-service model  

DOE Patents (OSTI)

A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

1999-01-01T23:59:59.000Z

280

Remote information service access system based on a client-server-service model  

DOE Patents (OSTI)

A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

Konrad, Allan M. (P.O. Box 4023, Berkeley, CA 94704)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

The Case for A Hierarchal System Model for Linux Clusters  

SciTech Connect

The computer industry today is no longer driven, as it was in the 40s, 50s and 60s, by High-performance computing requirements. Rather, HPC systems, especially Leadership class systems, sit on top of a pyramid investment mode. Figure 1 shows a representative pyramid investment model for systems hardware. At the base of the pyramid is the huge investment (order 10s of Billions of US Dollars per year) in semiconductor fabrication and process technologies. These costs, which are approximately doubling with every generation, are funded from investments multiple markets: enterprise, desktops, games, embedded and specialized devices. Over and above these base technology investments are investments for critical technology elements such as microprocessor, chipsets and memory ASIC components. Investments for these components are spread across the same markets as the base semiconductor processes investments. These second tier investments are approximately half the size of the lower level of the pyramid. The next technology investment layer up, tier 3, is more focused on scalable computing systems such as those needed for HPC and other markets. These tier 3 technology elements include networking (SAN, WAN and LAN), interconnects and large scalable SMP designs. Above these is tier 4 are relatively small investments necessary to build very large, scalable systems high-end or Leadership class systems. Primary among these are the specialized network designs of vertically integrated systems, etc.

Seager, M; Gorda, B

2009-06-05T23:59:59.000Z

282

Simulation of systems with dynamically varying model structure  

Science Journals Connector (OSTI)

Hybrid systems are dynamical systems composed of components with discrete and continuous behavior. Some systems change their structure during simulation, or their components behavior is essentially changing. This ''structural dynamics'' can be described ... Keywords: Discrete-continuous simulation, Hybrid systems, Modelica, Structural dynamics, VHDL-AMS

Peter Schwarz

2008-12-01T23:59:59.000Z

283

Modeling of Residential Buildings and Heating Systems  

E-Print Network (OSTI)

-zone building model is used in each case. A model of the heating system is also used for the multi-storey building. Both co-heating and tracer gas measurements are used in order to adjust the parameters of each building model. A complete monitoring...

Masy, G.; Lebrun, J.

2004-01-01T23:59:59.000Z

284

Reference Modeling for Inter-organizational Systems  

E-Print Network (OSTI)

to gain efficiency in the modeling process and a higher quality of inter-organizational solutions. 1Reference Modeling for Inter-organizational Systems Dieter Mayrhofer Institute of Software@big.tuwien.ac.at Abstract. Inter-organizational business process models are created and used by different partner networks

285

Prerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of  

E-Print Network (OSTI)

Thesis IDSC-LG-FZ-05 Gas Diesel Engine Modeling and Control The gas diesel engine is a natural gas enginePrerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of Internal Combustion Engine Systems, IC Engines, ...), Optimization Course, Matlab

Lygeros, John

286

Model documentation report: Commercial Sector Demand Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach and development of the National Energy Modeling System (NEMS) Commercial Sector Demand Module. The report catalogues and describes the model assumptions, computational methodology, parameter estimation techniques, model source code, and forecast results generated through the synthesis and scenario development based on these components. This report serves three purposes. First, it is a reference document providing a detailed description for model analysts, users, and the public. Second, this report meets the legal requirement of the Energy Information Administration (EIA) to provide adequate documentation in support of its statistical and forecast reports (Public Law 93-275, section 57(b)(1)). Third, it facilitates continuity in model development by providing documentation from which energy analysts can undertake model enhancements, data updates, and parameter refinements as future projects.

NONE

1995-02-01T23:59:59.000Z

287

Model documentation report: Commercial sector demand module of the national energy modeling system  

SciTech Connect

This report documents the objectives, analytical approach and development of the National Energy Modeling System (NEMS) Commercial Sector Demand Module. The report catalogues and describes the model assumptions, computational methodology, parameter estimation techniques, model source code, and forecast results generated through the synthesis and scenario development based on these components. This document serves three purposes. First, it is a reference document providing a detailed description for model analysts, users, and the public. Second, this report meets the legal requirement of the Energy Information Administration (EIA) to provide adequate documentation in support of its statistical and forecast reports. Third, it facilitates continuity in model development by providing documentation from which energy analysts can undertake model enhancements, data updates, and parameter refinements as future projects.

NONE

1994-08-01T23:59:59.000Z

288

Human performance modeling for system of systems analytics.  

SciTech Connect

A Laboratory-Directed Research and Development project was initiated in 2005 to investigate Human Performance Modeling in a System of Systems analytic environment. SAND2006-6569 and SAND2006-7911 document interim results from this effort; this report documents the final results. The problem is difficult because of the number of humans involved in a System of Systems environment and the generally poorly defined nature of the tasks that each human must perform. A two-pronged strategy was followed: one prong was to develop human models using a probability-based method similar to that first developed for relatively well-understood probability based performance modeling; another prong was to investigate more state-of-art human cognition models. The probability-based modeling resulted in a comprehensive addition of human-modeling capability to the existing SoSAT computer program. The cognitive modeling resulted in an increased understanding of what is necessary to incorporate cognition-based models to a System of Systems analytic environment.

Dixon, Kevin R.; Lawton, Craig R.; Basilico, Justin Derrick; Longsine, Dennis E. (INTERA, Inc., Austin, TX); Forsythe, James Chris; Gauthier, John Henry; Le, Hai D.

2008-10-01T23:59:59.000Z

289

Bose condensate inb interaction with excitations - a two-component space-dependent model close to equilibrium  

E-Print Network (OSTI)

The paper considers a model for Bose gases in the so-called 'high-temperature range' below the temperature Tc, where Bose-Einstein condensation sets in.The model is of non-linear two-component type, consisting of a kinetic equation with periodic boundary conditions for the distribution function of a gas of excitations interacting with a Bose condensate, which is described by a Gross-Pitaevskii equation. Results on well-posedness and long time behaviour are proved in a H1-setting close to equilibrium.

L. Arkeryd; A. Nouri

2014-10-13T23:59:59.000Z

290

Logistics systems modeling and simulation  

Science Journals Connector (OSTI)

Modern logistics systems are much more than simply networks of material flow. They involve collaboration between firms that are also competitors. The supply chain can be a key consideration in product design, with its design and operations influenced ...

George Thiers; Leon McGinnis

2011-12-01T23:59:59.000Z

291

MODEL ADAPTATION FOR HYPERBOLIC SYSTEMS WITH RELAXATION  

E-Print Network (OSTI)

MODEL ADAPTATION FOR HYPERBOLIC SYSTEMS WITH RELAXATION H. MATHIS, C. CANC`ES, E. GODLEWSKI, N the phenomenon under consideration. We focus in this work on general hyperbolic systems with stiff relaxation source terms together with the corre- sponding hyperbolic equilibrium systems. The goal is to determine

Paris-Sud XI, Université de

292

2005: Table of EMICs (Earth System Models of Intermediate Complexity  

E-Print Network (OSTI)

apparent that Earth system modelling has to rely on a hierarchy of models in which models of intermediate

Martin Claussen

293

A novel optimization sizing model for hybrid solar-wind power generation system  

Science Journals Connector (OSTI)

This paper develops the Hybrid Solar-Wind System Optimization Sizing (HSWSO) model, to optimize the capacity sizes of different components of hybrid solar-wind power generation systems employing a battery bank. The HSWSO model consists of three parts: the model of the hybrid system, the model of Loss of Power Supply Probability (LPSP) and the model of the Levelised Cost of Energy (LCE). The flow chart of the HSWSO model is also illustrated. With the incorporated HSWSO model, the sizing optimization of hybrid solar-wind power generation systems can be achieved technically and economically according to the system reliability requirements. A case study is reported to show the importance of the HSWSO model for sizing the capacities of wind turbines, PV panel and battery banks of a hybrid solar-wind renewable energy system.

Hongxing Yang; Lin Lu; Wei Zhou

2007-01-01T23:59:59.000Z

294

Model documentation report: Commercial Sector Demand Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach and development of the National Energy Modeling System (NEMS) Commercial Sector Demand Module. The report catalogues and describes the model assumptions, computational methodology, parameter estimation techniques, model source code, and forecast results generated through the synthesis and scenario development based on these components. The NEMS Commercial Sector Demand Module is a simulation tool based upon economic and engineering relationships that models commercial sector energy demands at the nine Census Division level of detail for eleven distinct categories of commercial buildings. Commercial equipment selections are performed for the major fuels of electricity, natural gas, and distillate fuel, for the major services of space heating, space cooling, water heating, ventilation, cooking, refrigeration, and lighting. The algorithm also models demand for the minor fuels of residual oil, liquefied petroleum gas, steam coal, motor gasoline, and kerosene, the renewable fuel sources of wood and municipal solid waste, and the minor services of office equipment. Section 2 of this report discusses the purpose of the model, detailing its objectives, primary input and output quantities, and the relationship of the Commercial Module to the other modules of the NEMS system. Section 3 of the report describes the rationale behind the model design, providing insights into further assumptions utilized in the model development process to this point. Section 3 also reviews alternative commercial sector modeling methodologies drawn from existing literature, providing a comparison to the chosen approach. Section 4 details the model structure, using graphics and text to illustrate model flows and key computations.

NONE

1998-01-01T23:59:59.000Z

295

Results from modeling and simulation of chemical downstream etch systems  

SciTech Connect

This report summarizes modeling work performed at Sandia in support of Chemical Downstream Etch (CDE) benchmark and tool development programs under a Cooperative Research and Development Agreement (CRADA) with SEMATECH. The Chemical Downstream Etch (CDE) Modeling Project supports SEMATECH Joint Development Projects (JDPs) with Matrix Integrated Systems, Applied Materials, and Astex Corporation in the development of new CDE reactors for wafer cleaning and stripping processes. These dry-etch reactors replace wet-etch steps in microelectronics fabrication, enabling compatibility with other process steps and reducing the use of hazardous chemicals. Models were developed at Sandia to simulate the gas flow, chemistry and transport in CDE reactors. These models address the essential components of the CDE system: a microwave source, a transport tube, a showerhead/gas inlet, and a downstream etch chamber. The models have been used in tandem to determine the evolution of reactive species throughout the system, and to make recommendations for process and tool optimization. A significant part of this task has been in the assembly of a reasonable set of chemical rate constants and species data necessary for successful use of the models. Often the kinetic parameters were uncertain or unknown. For this reason, a significant effort was placed on model validation to obtain industry confidence in the model predictions. Data for model validation were obtained from the Sandia Molecular Beam Mass Spectrometry (MBMS) experiments, from the literature, from the CDE Benchmark Project (also part of the Sandia/SEMATECH CRADA), and from the JDP partners. The validated models were used to evaluate process behavior as a function of microwave-source operating parameters, transport-tube geometry, system pressure, and downstream chamber geometry. In addition, quantitative correlations were developed between CDE tool performance and operation set points.

Meeks, E.; Vosen, S.R.; Shon, J.W.; Larson, R.S.; Fox, C.A.; Buchenauer

1996-05-01T23:59:59.000Z

296

Economical ontological models for discrete quantum systems  

Science Journals Connector (OSTI)

I use the recently proposed framework of ontological models (N. Harrigan, T. Rudolph, and S. Aaronson, e-print arXiv:0709.1149) to obtain economical models for the results of tomographically complete sets of measurements on finite-dimensional quantum systems. I describe a procedure that simplifies the models by decreasing the number of necessary ontic states and present an explicit model with just 33 ontic states for a qutrit.

Ernesto F. Galvo

2009-08-05T23:59:59.000Z

297

Economical ontological models for discrete quantum systems  

E-Print Network (OSTI)

I use the recently proposed framework of ontological models [Harrigan et al., arXiv:0709.1149v2] to obtain economical models for results of tomographically complete sets of measurements on finite-dimensional quantum systems. I describe a procedure that simplifies the models by decreasing the number of necessary ontic states, and present an explicit model with just 33 ontic states for a qutrit.

Ernesto F. Galvao

2009-02-13T23:59:59.000Z

298

Compact surface plasmon resonance imaging sensing system based on general optoelectronic components  

Science Journals Connector (OSTI)

We present a simple surface plasmon resonance imaging (SPRi) sensing system based on some common optoelectronic devices in this paper. Using an optical fiber based SPR sensor as...

Peng, Wei; Liu, Yun; Fang, Peng; Liu, Xiuxin; Gong, Zhenfeng; Wang, Hanqi; Cheng, Fang

2014-01-01T23:59:59.000Z

299

Cooling system having reduced mass pin fins for components in a gas turbine engine  

DOE Patents (OSTI)

A cooling system having one or more pin fins with reduced mass for a gas turbine engine is disclosed. The cooling system may include one or more first surfaces defining at least a portion of the cooling system. The pin fin may extend from the surface defining the cooling system and may have a noncircular cross-section taken generally parallel to the surface and at least part of an outer surface of the cross-section forms at least a quartercircle. A downstream side of the pin fin may have a cavity to reduce mass, thereby creating a more efficient turbine airfoil.

Lee, Ching-Pang; Jiang, Nan; Marra, John J

2014-03-11T23:59:59.000Z

300

HIGH-POWER MILLIMETREWAVE TRANSMISSION SYSTEMS AND COMPONENTS FOR ELECTRON CYCLOTRON HEATING OF FUSION PLASMAS  

Science Journals Connector (OSTI)

At the Institute for Plasma Research at the University of Stuttgart, high-power millimetre wave transmission systems for electron cyclotron heating (ECRH) and current drive (ECCD)...

W. Kasparek; G. Dammertz; V. Erckmann

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Process modeling for the Integrated Thermal Treatment System (ITTS) study  

SciTech Connect

This report describes the process modeling done in support of the integrated thermal treatment system (ITTS) study, Phases 1 and 2. ITTS consists of an integrated systems engineering approach for uniform comparison of widely varying thermal treatment technologies proposed for treatment of the contact-handled mixed low-level wastes (MLLW) currently stored in the U.S. Department of Energy complex. In the overall study, 19 systems were evaluated. Preconceptual designs were developed that included all of the various subsystems necessary for a complete installation, from waste receiving through to primary and secondary stabilization and disposal of the processed wastes. Each system included the necessary auxiliary treatment subsystems so that all of the waste categories in the complex were fully processed. The objective of the modeling task was to perform mass and energy balances of the major material components in each system. Modeling of trace materials, such as pollutants and radioactive isotopes, were beyond the present scope. The modeling of the main and secondary thermal treatment, air pollution control, and metal melting subsystems was done using the ASPEN PLUS process simulation code, Version 9.1-3. These results were combined with calculations for the remainder of the subsystems to achieve the final results, which included offgas volumes, and mass and volume waste reduction ratios.

Liebelt, K.H.; Brown, B.W.; Quapp, W.J.

1995-09-01T23:59:59.000Z

302

System-level modeling for geological storage of CO2  

SciTech Connect

One way to reduce the effects of anthropogenic greenhousegases on climate is to inject carbon dioxide (CO2) from industrialsources into deep geological formations such as brine formations ordepleted oil or gas reservoirs. Research has and is being conducted toimprove understanding of factors affecting particular aspects ofgeological CO2 storage, such as performance, capacity, and health, safetyand environmental (HSE) issues, as well as to lower the cost of CO2capture and related processes. However, there has been less emphasis todate on system-level analyses of geological CO2 storage that considergeological, economic, and environmental issues by linking detailedrepresentations of engineering components and associated economic models.The objective of this study is to develop a system-level model forgeological CO2 storage, including CO2 capture and separation,compression, pipeline transportation to the storage site, and CO2injection. Within our system model we are incorporating detailedreservoir simulations of CO2 injection and potential leakage withassociated HSE effects. The platform of the system-level modelingisGoldSim [GoldSim, 2006]. The application of the system model is focusedon evaluating the feasibility of carbon sequestration with enhanced gasrecovery (CSEGR) in the Rio Vista region of California. The reservoirsimulations are performed using a special module of the TOUGH2 simulator,EOS7C, for multicomponent gas mixtures of methane and CO2 or methane andnitrogen. Using this approach, the economic benefits of enhanced gasrecovery can be directly weighed against the costs, risks, and benefitsof CO2 injection.

Zhang, Yingqi; Oldenburg, Curtis M.; Finsterle, Stefan; Bodvarsson, Gudmundur S.

2006-04-24T23:59:59.000Z

303

Tool Support for Incremental Failure Mode and Effects Analysis of Component-Based Systems  

E-Print Network (OSTI)

¨oping, Sweden {jonel, simin}@ida.liu.se Abstract Failure Mode and Effects Analysis (FMEA) is a well- known technique widely used for safety assessment in the area of safety-critical systems. However, FMEA is tradi systems. Also, small modifications in the design may result in a complete revision of the initial FMEA

304

Towards a modeling language for cyber-physical systems  

Science Journals Connector (OSTI)

A cyber-physical system (CPS) is an interactive system of continuous plants and real-time controller programs. These systems usually feature a tight relationship between the physical and computational components and exhibit true concurrency with respect ...

Longfei Zhu; Yongxin Zhao; Huibiao Zhu; Qiwen Xu

2013-01-01T23:59:59.000Z

305

Maui Electrical System Model Development  

E-Print Network (OSTI)

1 2. Simulation Data and Assumptions 1 2.1 Economic Data and Assumptions 1 2.1.1 Thermal Plants 1 2 in the preliminary results presentation on June 16th, are summarized in this section. 2.1.1 Thermal Plants of the power plant FUEL_TYPE OIL-Distillate Oil (No.2); RENEW - zero cost fuel used for modeling Wind & Geoth

306

Comparative Evaluation of Generalized River/Reservoir System Models  

E-Print Network (OSTI)

This report reviews user-oriented generalized reservoir/river system models. The terms reservoir/river system, reservoir system, reservoir operation, or river basin management "model" or "modeling system" are used synonymously to refer to computer...

Wurbs, Ralph A.

307

MODELLING AND IDENTIFICATION OF A HIGH-PRECISION PLANAR POSITIONING SYSTEM  

E-Print Network (OSTI)

embedded into the stator plate. Currents through those conductors together with the permanent magnets and electromagnetic coupling as a principle of propul- sion. We develop physical models of all components and in-- planar positioning system, air bearing, electro magnetic propulsion, physical modelling 1. INTRODUCTION

Knobloch,Jürgen

308

Integrated UML and modelica system modeling with ModelicaML in Eclipse  

Science Journals Connector (OSTI)

Complex products are increasingly consisting of both software and hardware components which are closely interacting. Thus, modeling tools and processes need to support co-design of software and hardware in an integrated way. Currently, UML is the dominant ... Keywords: SysML, UML, modelica, simulation, system modeling

Adrian Pop; David Akhvlediani; Peter Fritzson

2007-11-01T23:59:59.000Z

309

Evaluating the Similarity Estimator Component of the TWIN Personality-based Recommender System  

E-Print Network (OSTI)

Social Media Research Group, ITT Dublin/Ireland E-mail: John.Cardiff@ittdublin.ie Paolo Rosso NLE Lab a serious challenge to the user searching for a particular piece of information. Recommender Systems have

Rosso, Paolo

310

A Real-Time Saft System Applied to the Ultrasonic Inspection of Nuclear Reactor Components  

Science Journals Connector (OSTI)

In 1982 Pacific Northwest Laboratory began activity under the sponsorship of the U.S. Nuclear Regulatory Commission to implement SAFT technology in a field usable system. The ... extensive research related to the...

T. E. Hall; S. R. Doctor; L. D. Reid

1987-01-01T23:59:59.000Z

311

CTBT integrated verification system evaluation model supplement  

SciTech Connect

Sandia National Laboratories has developed a computer based model called IVSEM (Integrated Verification System Evaluation Model) to estimate the performance of a nuclear detonation monitoring system. The IVSEM project was initiated in June 1994, by Sandia's Monitoring Systems and Technology Center and has been funded by the U.S. Department of Energy's Office of Nonproliferation and National Security (DOE/NN). IVSEM is a simple, ''top-level,'' modeling tool which estimates the performance of a Comprehensive Nuclear Test Ban Treaty (CTBT) monitoring system and can help explore the impact of various sensor system concepts and technology advancements on CTBT monitoring. One of IVSEM's unique features is that it integrates results from the various CTBT sensor technologies (seismic, in sound, radionuclide, and hydroacoustic) and allows the user to investigate synergy among the technologies. Specifically, IVSEM estimates the detection effectiveness (probability of detection), location accuracy, and identification capability of the integrated system and of each technology subsystem individually. The model attempts to accurately estimate the monitoring system's performance at medium interfaces (air-land, air-water) and for some evasive testing methods such as seismic decoupling. The original IVSEM report, CTBT Integrated Verification System Evaluation Model, SAND97-25 18, described version 1.2 of IVSEM. This report describes the changes made to IVSEM version 1.2 and the addition of identification capability estimates that have been incorporated into IVSEM version 2.0.

EDENBURN,MICHAEL W.; BUNTING,MARCUS; PAYNE JR.,ARTHUR C.; TROST,LAWRENCE C.

2000-03-02T23:59:59.000Z

312

A feature model of coupling technologies for Earth System Models  

Science Journals Connector (OSTI)

Couplers that link together two or more numerical simulations are well-known abstractions in the Earth System Modeling (ESM) community. In the past decade, reusable software assets have emerged to facilitate scientists in implementing couplers. While ... Keywords: Climate model, Code generation, Coupler, Feature analysis, Software architecture

Rocky Dunlap; Spencer Rugaber; Leo Mark

2013-04-01T23:59:59.000Z

313

Reduced-Order Model Design for Nonlinear Smart System Models  

E-Print Network (OSTI)

nonlinear smart material system models can yield full-order numerical models that accurately characterize: Smart materials, proper orthogonal decomposition 1. Introduction Proper Orthogonal Decomposition (POD those seeking to implement real-time control on smart material structures (see [1] and the references

314

Mathematical modeling for a thermionic-AMTEC cascade system  

SciTech Connect

A mathematical modeling of a system consisting of a cascade of a thermionic energy conversion (TIEC) device and an alkali metal thermal to electrical conversion (AMTEC) device has been performed. The TIEC is heated by electron bombardment which converts heat partially into electricity and rejects the remaining. The AMTEC utilizes this reject heat of the TIEC. A mathematical thermal model of the cascade converter has been developed to analyze effects of key parameters such as power level, heat fluxes, temperatures, cascade geometry, etc. In this effort, a 9-node system of nonlinear simultaneous equations has been constructed which is solved by MATHCAD predicting the temperatures of the principal components and the heat flow. Through this study, a better understanding of the thermal coupling of the two converters was gained which helps to produce a more efficient cascade. {copyright} {ital 1996 American Institute of Physics.}

Lodhi, M.A. [Department of Physics, Texas Tech University, Lubbock, Texas 79409 (United States); Schuller, M.; Hausgen, P. [Phillips Laboratory, Kirtland AFB, New Mexico 87117 (United States)

1996-03-01T23:59:59.000Z

315

Human performance modeling for system of systems analytics :soldier fatigue.  

SciTech Connect

The military has identified Human Performance Modeling (HPM) as a significant requirement and challenge of future systems modeling and analysis initiatives as can be seen in the Department of Defense's (DoD) Defense Modeling and Simulation Office's (DMSO) Master Plan (DoD 5000.59-P 1995). To this goal, the military is currently spending millions of dollars on programs devoted to HPM in various military contexts. Examples include the Human Performance Modeling Integration (HPMI) program within the Air Force Research Laboratory, which focuses on integrating HPMs with constructive models of systems (e.g. cockpit simulations) and the Navy's Human Performance Center (HPC) established in September 2003. Nearly all of these initiatives focus on the interface between humans and a single system. This is insufficient in the era of highly complex network centric SoS. This report presents research and development in the area of HPM in a system-of-systems (SoS). Specifically, this report addresses modeling soldier fatigue and the potential impacts soldier fatigue can have on SoS performance.

Lawton, Craig R.; Campbell, James E.; Miller, Dwight Peter

2005-10-01T23:59:59.000Z

316

A toolkit for building earth system models  

SciTech Connect

An earth system model is a computer code designed to simulate the interrelated processes that determine the earth's weather and climate, such as atmospheric circulation, atmospheric physics, atmospheric chemistry, oceanic circulation, and biosphere. I propose a toolkit that would support a modular, or object-oriented, approach to the implementation of such models.

Foster, I.

1993-03-01T23:59:59.000Z

317

A toolkit for building earth system models  

SciTech Connect

An earth system model is a computer code designed to simulate the interrelated processes that determine the earth`s weather and climate, such as atmospheric circulation, atmospheric physics, atmospheric chemistry, oceanic circulation, and biosphere. I propose a toolkit that would support a modular, or object-oriented, approach to the implementation of such models.

Foster, I.

1993-03-01T23:59:59.000Z

318

Natural Gas Transmission and Distribution Model of the National Energy Modeling System. Volume 1  

SciTech Connect

The Natural Gas Transmission and Distribution Model (NGTDM) is the component of the National Energy Modeling System (NEMS) that is used to represent the domestic natural gas transmission and distribution system. The NGTDM is the model within the NEMS that represents the transmission, distribution, and pricing of natural gas. The model also includes representations of the end-use demand for natural gas, the production of domestic natural gas, and the availability of natural gas traded on the international market based on information received from other NEMS models. The NGTDM determines the flow of natural gas in an aggregate, domestic pipeline network, connecting domestic and foreign supply regions with 12 demand regions. The purpose of this report is to provide a reference document for model analysts, users, and the public that defines the objectives of the model, describes its basic design, provides detail on the methodology employed, and describes the model inputs, outputs, and key assumptions. Subsequent chapters of this report provide: an overview of NGTDM; a description of the interface between the NEMS and NGTDM; an overview of the solution methodology of the NGTDM; the solution methodology for the Annual Flow Module; the solution methodology for the Distributor Tariff Module; the solution methodology for the Capacity Expansion Module; the solution methodology for the Pipeline Tariff Module; and a description of model assumptions, inputs, and outputs.

NONE

1998-01-01T23:59:59.000Z

319

Eliciting fuzzy distributions from experts for ranking conceptual risk model components  

Science Journals Connector (OSTI)

An expert elicitation methodology was developed to integrate scientific knowledge from many studies at different spatial and temporal scales. The methodology utilised a structured one-to-one interview to elicit scale-dependent conceptual models and expert-weightings ... Keywords: Elicitation, Expert opinion, Fuzzy number, Phosphorus, Uncertainty, Water framework directive

T. Page; A. L. Heathwaite; L. J. Thompson; L. Pope; R. Willows

2012-10-01T23:59:59.000Z

320

Modelling Soft Tissue Deformations using Principal Component Analysis and Haptic Devices  

E-Print Network (OSTI)

. Gillies and Michail Bourmpos Department of Computing, Imperial College of Science, Technology and Medicine simulators designed to teach medical procedures. The technique is based on pre-computing a representative set training using computer graphics. However there is a computational problem in applying modern modelling

Gillies, Duncan

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Systems for the expression of orthogonal translation components eubacterial host cells  

DOE Patents (OSTI)

The invention relates to compositions and methods for the in vivo production of polypeptides comprising one or more unnatural amino acids. Specifically, the invention provides plasmid systems for the efficient eubacterial expression of polypeptides comprising one or more unnatural amino acids at genetically-programmed positions.

Ryu, Youngha (San Diego, CA); Schultz, Peter G. (La Jolla, CA)

2012-06-12T23:59:59.000Z

322

Systems for the expression of orthogonal translation components in eubacterial host cells  

DOE Patents (OSTI)

The invention related to compositions and methods for the in vivo production of polypeptides comprising one or more unnatural amino acids. Specifically, the invention provides plasmid systems for the efficient eubacterial expression of polypeptides comprising one or more unnatural acids at genetically-programmed positions.

Ryu, Youngha; Schultz, Peter G.

2013-01-22T23:59:59.000Z

323

Systems for the expression of orthogonal translation components in eubacterial host cells  

DOE Patents (OSTI)

The invention relates to compositions and methods for the in vivo production of polypeptides comprising one or more unnatural amino acids. Specifically, the invention provides plasmid systems for the efficient eubacterial expression of polypeptides comprising one or more unnatural amino acids at genetically-programmed positions.

Ryu, Youngha (San Diego, CA); Schultz, Peter G. (La Jolla, CA)

2011-06-14T23:59:59.000Z

324

Exactly Solvable Model for Driven Dissipative Systems  

Science Journals Connector (OSTI)

We introduce a solvable stochastic model inspired by granular gases for driven dissipative systems. We characterize far from equilibrium steady states of such systems through the non-Boltzmann energy distribution and compare different measures of effective temperatures. As an example we demonstrate that fluctuation-dissipation relations hold, however, with an effective temperature differing from the effective temperature defined from the average energy.

Yair Srebro and Dov Levine

2004-12-07T23:59:59.000Z

325

CTBT Integrated Verification System Evaluation Model  

SciTech Connect

Sandia National Laboratories has developed a computer based model called IVSEM (Integrated Verification System Evaluation Model) to estimate the performance of a nuclear detonation monitoring system. The IVSEM project was initiated in June 1994, by Sandia`s Monitoring Systems and Technology Center and has been funded by the US Department of Energy`s Office of Nonproliferation and National Security (DOE/NN). IVSEM is a simple, top-level, modeling tool which estimates the performance of a Comprehensive Nuclear Test Ban Treaty (CTBT) monitoring system and can help explore the impact of various sensor system concepts and technology advancements on CTBT monitoring. One of IVSEM`s unique features is that it integrates results from the various CTBT sensor technologies (seismic, infrasound, radionuclide, and hydroacoustic) and allows the user to investigate synergy among the technologies. Specifically, IVSEM estimates the detection effectiveness (probability of detection) and location accuracy of the integrated system and of each technology subsystem individually. The model attempts to accurately estimate the monitoring system`s performance at medium interfaces (air-land, air-water) and for some evasive testing methods such as seismic decoupling. This report describes version 1.2 of IVSEM.

Edenburn, M.W.; Bunting, M.L.; Payne, A.C. Jr.

1997-10-01T23:59:59.000Z

326

Predictions on the transverse momentum spectra for charged particle production at LHC-energies from a two component model  

E-Print Network (OSTI)

Transverse momentum spectra, $d^2\\sigma/(d\\eta dp_T^2)$, of charged hadron production in $pp$-collisions are considered in terms of a recently introduced two component model. The shapes of the particle distributions vary as a function of c.m.s. energy in the collision and the measured pseudorapidity interval. In order to extract predictions on the double-differential cross-sections $d^2\\sigma/(d\\eta dp_T^2)$ of hadron production for future LHC-measurements the different sets of available experimental data have been used in this study.

Bylinkin, Alexander; Rostovtsev, Andrei

2015-01-01T23:59:59.000Z

327

Matrix analysis applied to the equivalent circuits of ?, , and o-components of three-phase systems  

E-Print Network (OSTI)

LIBRARY i Ii R COLLEGE OF IEXAO MATlUX ANALYSIS APPLIED TO THE EQUIVALENT CIRCUITS OF , P, AND 0 COMPONENTS OF THREE-PHASE SYSTEMS A Theeie MARSHALL CHUAN YUNG KUO b ~ Submitted to the Graduate School of the Agricnltaral and Mechaaical... College of Tenas ln partial fnlfillment of the reqniremente for the degree of MASTER OF SCIENCE May 1958 Ms(or Sub)ect: Electrical Engineering LIBRARY A 4 M COLLEGE OF TEXAS MATRIX ANALYSIS APPLIED TO THE EQUIVALENT CIRCUITS OF g, p, AND 0...

Kuo, Marshall Chuan Yung

1958-01-01T23:59:59.000Z

328

Optimizing the CORBA Component Model for High-performance and Real-time Applications  

E-Print Network (OSTI)

Science, Washington University Electrical and Computer Engineering Dept. St. Louis, MO 63130, USA 2000 Conference, IFIP/ACM, Palisades, New York, April 3-7, 2000. Abstract With the recent adoption recently, however, there were no CORBA ORBs that targeted high-performance and real-time systems, which

Schmidt, Douglas C.

329

Combined heat and power systems for commercial buildings: investigating cost, emissions, and primary energy reduction based on system components.  

E-Print Network (OSTI)

?? Combined heat and power (CHP) systems produce electricity and useful heat from fuel. When power is produced near a building which consumes power, transmission (more)

Smith, Amanda D.

2012-01-01T23:59:59.000Z

330

Model System of Self-Reproducing Vesicles  

Science Journals Connector (OSTI)

Development of self-reproducing vesicle systems is the first step for autopoietic cycles. We established a model self-reproducing vesicle system without the membrane molecule synthesis route. The model vesicle composed of cylinder- and inverse-cone-shaped lipids formed inclusion vesicles inside the mother vesicle, and the inclusion vesicles were then expelled by a temperature cycling. By changing the vesicle composition, the mother vesicles showed a budding-type self-reproduction pathway. A key concept of this system is the coupling of the main-chain transition and the shape of lipids.

Yuka Sakuma and Masayuki Imai

2011-10-31T23:59:59.000Z

331

Kinetic Roughening and Phase Ordering in the Two-Component Growth Model  

E-Print Network (OSTI)

Interplay between kinetic roughening and phase ordering is studied in a growth SOS model with two kinds of particles and Ising-like interaction by Monte Carlo simulations. We found that, for a sufficiently large coupling, growth is strongly affected by interaction between species. Surface roughness increases rapidly with coupling. Scaling exponents for kinetic roughening are enhanced with respect to homogeneous situation. Phase ordering which leads to the lamellar structure persisting for a long time is observed. Surface profiles in strong coupling regime have a saw-tooth form, with the correlation between the positions of local minima and the domain boundaries. Key words: Computer simulations; Ising models; Growth; Surface roughening; Surface structure, morphology, roughness and topography. PACS: 81.10.Aj, 68.35.Ct, 75.70Kw 1 Introduction Growth by vapour deposition is a technologically important process for producing high quality materials. During last years much progress has been ma...

unknown authors

332

Comparison of the Accuracy and Speed of Transient Mobile A/C System Simulation Models: Preprint  

SciTech Connect

The operation of air conditioning (A/C) systems is a significant contributor to the total amount of fuel used by light- and heavy-duty vehicles. Therefore, continued improvement of the efficiency of these mobile A/C systems is important. Numerical simulation has been used to reduce the system development time and to improve the electronic controls, but numerical models that include highly detailed physics run slower than desired for carrying out vehicle-focused drive cycle-based system optimization. Therefore, faster models are needed even if some accuracy is sacrificed. In this study, a validated model with highly detailed physics, the 'Fully-Detailed' model, and two models with different levels of simplification, the 'Quasi-Transient' and the 'Mapped- Component' models, are compared. The Quasi-Transient model applies some simplifications compared to the Fully-Detailed model to allow faster model execution speeds. The Mapped-Component model is similar to the Quasi-Transient model except instead of detailed flow and heat transfer calculations in the heat exchangers, it uses lookup tables created with the Quasi-Transient model. All three models are set up to represent the same physical A/C system and the same electronic controls. Speed and results of the three model versions are compared for steady state and transient operation. Steady state simulated data are also compared to measured data. The results show that the Quasi-Transient and Mapped-Component models ran much faster than the Fully-Detailed model, on the order of 10- and 100-fold, respectively. They also adequately approach the results of the Fully-Detailed model for steady-state operation, and for drive cycle-based efficiency predictions

Kiss, T.; Lustbader, J.

2014-03-01T23:59:59.000Z

333

Model documentation: Renewable Fuels Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach, and design of the National Energy Modeling System (NEMS) Renewable Fuels Module (RFM) as it related to the production of the 1994 Annual Energy Outlook (AEO94) forecasts. The report catalogues and describes modeling assumptions, computational methodologies, data inputs, and parameter estimation techniques. A number of offline analyses used in lieu of RFM modeling components are also described. This documentation report serves two purposes. First, it is a reference document for model analysts, model users, and the public interested in the construction and application of the RFM. Second, it meets the legal requirement of the Energy Information Administration (EIA) to provide adequate documentation in support of its models. The RFM consists of six analytical submodules that represent each of the major renewable energy resources -- wood, municipal solid waste (MSW), solar energy, wind energy, geothermal energy, and alcohol fuels. Of these six, four are documented in the following chapters: municipal solid waste, wind, solar and biofuels. Geothermal and wood are not currently working components of NEMS. The purpose of the RFM is to define the technological and cost characteristics of renewable energy technologies, and to pass these characteristics to other NEMS modules for the determination of mid-term forecasted renewable energy demand.

Not Available

1994-04-01T23:59:59.000Z

334

Automated cleaning of electronic components  

SciTech Connect

Environmental and operator safety concerns are leading to the elimination of trichloroethylene and chlorofluorocarbon solvents in cleaning processes that remove rosin flux, organic and inorganic contamination, and particulates from electronic components. Present processes depend heavily on these solvents for manual spray cleaning of small components and subassemblies. Use of alternative solvent systems can lead to longer processing times and reduced quality. Automated spray cleaning can improve the quality of the cleaning process, thus enabling the productive use of environmentally conscious materials, while minimizing personnel exposure to hazardous materials. We describe the development of a prototype robotic system for cleaning electronic components in a spray cleaning workcell. An important feature of the prototype system is the capability to generate the robot paths and motions automatically from the CAD models of the part to be cleaned, and to embed cleaning process knowledge into the automatically programmed operations.

Drotning, W.; Meirans, L.; Wapman, W.; Hwang, Y.; Koenig, L.; Petterson, B.

1994-07-01T23:59:59.000Z

335

Data: An often-ignored component of safety-related systems Alastair Faulkner, MSc.; CEng.; MBCS.; CSE International Ltd. Flixborough. UK  

E-Print Network (OSTI)

and operation of safety-related systems. The work described in this paper sets out to provide much neededData: An often-ignored component of safety-related systems Alastair Faulkner, MSc.; CEng.; MBCS. UK Keywords: Data, data-driven, safety-related systems Abstract Safety-related systems are being

Storey, Neil

336

Systems and methods for reactive distillation with recirculation of light components  

SciTech Connect

Systems and methods for producing gas-to-liquids products using reactive distillation are provided. The method for producing gas-to-liquids products can include reacting a feedstock in a column having a distillation zone and a reaction zone to provide a bottoms stream and an overhead stream. A first portion of the overhead stream can be recycled to the column at the top of the reaction zone and second portion of the overhead stream can be recycled to the column at the bottom of the reaction zone.

Stickney, Michael J. (Nassau Bay, TX); Jones, Jr., Edward M. (Friendswood, TX)

2011-07-26T23:59:59.000Z

337

Explaining the observed long coherence effects by 2D photon echo experiments in photosynthetic EET : Two-Component Phonon Spectrum model  

E-Print Network (OSTI)

We propose a simple stochastic model which successfully explains the long coherence effects observed in photosynthetic Excitation Energy Transport (EET) by 2D photon echo experiments of G. S. Engel et. al. (Nature, {\\bf 446} 782, (2007)). Our Two-Component Phonon Spectrum (TCPS) model is based upon the division of phonon degrees of freedom into a systematic component which is treated through polaron transformation and a stochastic component which is treated through dynamical disorder. This model successfully explains the observed long coherence upto $ \\sim 600 fsec$ in EET experiments.

Singh, Navinder; Amritkar, R E

2011-01-01T23:59:59.000Z

338

Intrinsic Uncertainties in Modeling Complex Systems.  

SciTech Connect

Models are built to understand and predict the behaviors of both natural and artificial systems. Because it is always necessary to abstract away aspects of any non-trivial system being modeled, we know models can potentially leave out important, even critical elements. This reality of the modeling enterprise forces us to consider the prospective impacts of those effects completely left out of a model - either intentionally or unconsidered. Insensitivity to new structure is an indication of diminishing returns. In this work, we represent a hypothetical unknown effect on a validated model as a finite perturba- tion whose amplitude is constrained within a control region. We find robustly that without further constraints, no meaningful bounds can be placed on the amplitude of a perturbation outside of the control region. Thus, forecasting into unsampled regions is a very risky proposition. We also present inherent difficulties with proper time discretization of models and representing in- herently discrete quantities. We point out potentially worrisome uncertainties, arising from math- ematical formulation alone, which modelers can inadvertently introduce into models of complex systems. Acknowledgements This work has been funded under early-career LDRD project %23170979, entitled %22Quantify- ing Confidence in Complex Systems Models Having Structural Uncertainties%22, which ran from 04/2013 to 09/2014. We wish to express our gratitude to the many researchers at Sandia who con- tributed ideas to this work, as well as feedback on the manuscript. In particular, we would like to mention George Barr, Alexander Outkin, Walt Beyeler, Eric Vugrin, and Laura Swiler for provid- ing invaluable advice and guidance through the course of the project. We would also like to thank Steven Kleban, Amanda Gonzales, Trevor Manzanares, and Sarah Burwell for their assistance in managing project tasks and resources.

Cooper, Curtis S; Bramson, Aaron L.; Ames, Arlo L.

2014-09-01T23:59:59.000Z

339

A revised HRD for individual components of binary systems from BaSeL BVRI synthetic photometry. Influence of interstellar extinction and stellar rotation  

E-Print Network (OSTI)

Johnson BVRI photometric data for individual components of binary systems have been provided by ten Brummelaar et al. (2000). This is essential because such binaries could play a critical role in calibrating the single-star stellar evolution theory. While they derived the effective temperature from their estimated spectral type, we infer metallicity-dependent Teffs from a minimizing method fitting the B-V, V-R and V-I colours. For this purpose, a grid of 621,600 flux distributions were computed from the Basel Stellar Library (BaSeL 2.2) of model-atmosphere spectra, and their theoretical colours compared with the observed photometry. As a matter of fact, the BaSeL colours show a very good agreement with the BVRI metallicity-dependent empirical calibrations of Alonso et al. (1996), temperatures being different by 3+-3 % in the range 4000-8000 K for dwarf stars. Before deriving the metallicity-dependent Teff from the BaSeL models, we paid particular attention to the influence of reddening and stellar rotation. A comparison between the MExcess code and neutral hydrogen column density data shows a good agreement for the sample but we point out a few directions where the MExcess model overestimates the E(B-V) colour excess. Influence of stellar rotation on the BVRI colours can be neglected except for 5 stars with large vsini, the maximum effect on temperature being less than 5%. Our final results are in good agreement with previous spectroscopic determinations available for a few primary components, and with ten Brummelaar et al. below ~10,000 K. Nevertheless, we obtain an increasing disagreement with their Teffs beyond 10,000 K. Finally, we provide a revised Hertzsprung-Russell diagram for the systems with the more accurately determined temperatures. (Abridged)

E. Lastennet; J. Fernandes; Th. Lejeune

2002-03-20T23:59:59.000Z

340

Application of Chebyshev Formalism to Identify Nonlinear Magnetic Field Components in Beam Transport Systems  

SciTech Connect

An experiment was conducted at Jefferson Lab's Continuous Electron Beam Accelerator Facility to develop a beam-based technique for characterizing the extent of the nonlinearity of the magnetic fields of a beam transport system. Horizontally and vertically oriented pairs of air-core kicker magnets were simultaneously driven at two different frequencies to provide a time-dependent transverse modulation of the beam orbit relative to the unperturbed reference orbit. Fourier decomposition of the position data at eight different points along the beamline was then used to measure the amplitude of these frequencies. For a purely linear transport system one expects to find solely the frequencies that were applied to the kickers with amplitudes that depend on the phase advance of the lattice. In the presence of nonlinear fields one expects to also find harmonics of the driving frequencies that depend on the order of the nonlinearity. Chebyshev polynomials and their unique properties allow one to directly quantify the magnitude of the nonlinearity with the minimum error. A calibration standard was developed using one of the sextupole magnets in a CEBAF beamline. The technique was then applied to a pair of Arc 1 dipoles and then to the magnets in the Transport Recombiner beamline to measure their multipole content as a function of transverse position within the magnets.

Michael Spata

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Multi-component modeling of quasielastic neutron scattering from phospholipid membranes  

SciTech Connect

We investigated molecular motions in the 0.3350 ps time range of D{sub 2}O-hydrated bilayers of 1-palmitoyl-oleoyl-sn-glycero-phosphocholine and 1,2-dimyristoyl-sn-glycero-phosphocholine in the liquid phase by quasielastic neutron scattering. Model analysis of sets of spectra covering scale lengths from 4.8 to 30 revealed the presence of three types of motion taking place on well-separated time scales: (i) slow diffusion of the whole phospholipid molecules in a confined cylindrical region; (ii) conformational motion of the phospholipid chains; and (iii) fast uniaxial rotation of the hydrogen atoms around their carbon atoms. Based on theoretical models for the hydrogen dynamics in phospholipids, the spatial extent of these motions was analysed in detail and the results were compared with existing literature data. The complex dynamics of protons was described in terms of elemental dynamical processes involving different parts of the phospholipid chain on whose motions the hydrogen atoms ride.

Wanderlingh, U., E-mail: uwanderlingh@unime.it; DAngelo, G.; Branca, C.; Trimarchi, A.; Rifici, S.; Finocchiaro, D. [Dipartimento di Fisica e Scienze della Terra, University of Messina, I-98166 Messina (Italy)] [Dipartimento di Fisica e Scienze della Terra, University of Messina, I-98166 Messina (Italy); Conti Nibali, V. [Institute for Physical Chemistry II, Ruhr-University Bochum, Bochum (Germany)] [Institute for Physical Chemistry II, Ruhr-University Bochum, Bochum (Germany); Crupi, C. [IPCF-V.le F. Stagno DAlcontres, n. 37, Messina 98158 (Italy)] [IPCF-V.le F. Stagno DAlcontres, n. 37, Messina 98158 (Italy); Ollivier, J. [Institut Laue-Langevin, 6 rue J. Horowitz, BP 156, F-38042 Grenoble (France)] [Institut Laue-Langevin, 6 rue J. Horowitz, BP 156, F-38042 Grenoble (France); Middendorf, H. D. [Clarendon Laboratory, University of Oxford, Oxford (United Kingdom)] [Clarendon Laboratory, University of Oxford, Oxford (United Kingdom)

2014-05-07T23:59:59.000Z

342

MOBILE SYSTEMS FOR DILUTION OF HIGHLY ENRICHED URANIUM AND URANIUM CONTAINING COMPONENTS  

SciTech Connect

A mobile melt-dilute (MMD) module for the treatment of aluminum research reactor spent fuel is being developed. The process utilizes a closed system approach to retain fission products/gases inside a sealed canister after treatment. The MMD process melts and dilutes spent fuel with depleted uranium to obtain a fissile fraction of less than 0.2. The final ingot is solidified inside the sealed canister and can be stored safely either wet or dry until final disposition or reprocessing. The MMD module can be staged at or near the research reactor fuel storage sites to facilitate the melt-dilute treatment of the spent fuel into a stable non-proliferable form.

Adams, T

2007-05-02T23:59:59.000Z

343

Hydrogen Delivery Analysis Models  

Energy.gov (U.S. Department of Energy (DOE))

DOE H2A Delivery Models: Components Model (delivery system component costs and performance) and Scenario Model (for urban and rural/interstate markets and demand levels, market penetration)

344

Wind Technology Modeling Within the System Advisor Model (SAM) (Poster)  

SciTech Connect

This poster provides detail for implementation and the underlying methodology for modeling wind power generation performance in the National Renewable Energy Laboratory's (NREL's) System Advisor Model (SAM). SAM's wind power model allows users to assess projects involving one or more large or small wind turbines with any of the detailed options for residential, commercial, or utility financing. The model requires information about the wind resource, wind turbine specifications, wind farm layout (if applicable), and costs, and provides analysis to compare the absolute or relative impact of these inputs. SAM is a system performance and economic model designed to facilitate analysis and decision-making for project developers, financers, policymakers, and energy researchers. The user pairs a generation technology with a financing option (residential, commercial, or utility) to calculate the cost of energy over the multi-year project period. Specifically, SAM calculates the value of projects which buy and sell power at retail rates for residential and commercial systems, and also for larger-scale projects which operate through a power purchase agreement (PPA) with a utility. The financial model captures complex financing and rate structures, taxes, and incentives.

Blair, N.; Dobos, A.; Ferguson, T.; Freeman, J.; Gilman, P.; Whitmore, J.

2014-05-01T23:59:59.000Z

345

National Energy Modeling System: An Overview  

Gasoline and Diesel Fuel Update (EIA)

6) 6) Distribution Category UC-950 The National Energy Modeling System: An Overview March 1996 Energy Information Administration Office of Integrated Analysis and Forecasting U.S. Department of Energy Washington, DC 20585 This report was prepared by the Energy Information Administration, the independent statistical and analytical agency within the Department of Energy. The information contained herein should not be construed as advocating or reflecting any policy position of the Department of Energy or of any other organization. PREFACE The National Energy Modeling System: An Overview (Overview) provides a summary description of the National Energy Modeling System (NEMS), which was used to generate the forecasts of energy production, demand, imports, and prices through the year 2015 for the Annual Energy Outlook 1996 (AEO96), (DOE/EIA- 0383(96)), released in January

346

Fuel cell components and systems having carbon-containing electrically-conductive hollow fibers  

DOE Patents (OSTI)

According to one embodiment, a system includes a structure having an ionically-conductive, electrically-resistive electrolyte/separator layer covering an inner or outer surface of a carbon-containing electrically-conductive hollow fiber and a catalyst coupled to the hollow fiber, an anode extending along at least part of a length of the structure, and a cathode extending along at least part of the length of the structure, the cathode being on an opposite side of the hollow fiber as the anode. In another embodiment, a method includes acquiring a structure having an ionically-conductive, electrically-resistive electrolyte/separator layer covering an inner or outer surface of a carbon-containing electrically-conductive hollow fiber and a catalyst along one side thereof, adding an anode that extends along at least part of a length of the structure, and adding a cathode that extends along at least part of the length of the structure on an opposite side as the anode.

Langry, Kevin C.; Farmer, Joseph C.

2014-07-08T23:59:59.000Z

347

Mathematical modeling of wax deposition in oil pipeline systems  

SciTech Connect

Deposition of wax on the wall of oil pipelines is often regarded as a problem since the tube diameter is reduced. Consequently, more power is needed to force the same amount of oil through the system. A mathematical model for quantitative prediction of wax deposition for each hydrocarbon component has been developed. Each component is characterized by weight fraction, heat of fusion, and melting point temperature. A model explains how a phase transition in the flow from liquid oil to waxy crystals may create a local density gradient and mass flux, which depends on the local temperature gradient. The model predicts that wax deposition can be considerably reduced even when the wall temperature is below the wax appearance point, provided the liquid/solid phase transition, expressed by the change in moles of liquid with temperature, is small at the wall temperature. Deposition as function of time has been obtained as a solution of differential equations derived from the principles of mass and energy conservation and the laws of diffusion.

Svendsen, J.A. (Hydro Research Centre, Porsgrunn (Norway). Dept. of Chemical Engineering)

1993-08-01T23:59:59.000Z

348

A summary of recent refinements to the WAKE dispersion model, a component of the HGSYSTEM/UF{sub 6} model suite  

SciTech Connect

The original WAKE dispersion model a component of the HGSYSTEM/UF{sub 6} model suite, is based on Shell Research Ltd.`s HGSYSTEM Version 3.0 and was developed by the US Department of Energy for use in estimating downwind dispersion of materials due to accidental releases from gaseous diffusion plant (GDP) process buildings. The model is applicable to scenarios involving both ground-level and elevated releases into building wake cavities of non-reactive plumes that are either neutrally or positively buoyant. Over the 2-year period since its creation, the WAKE model has been used to perform consequence analyses for Safety Analysis Reports (SARs) associated with gaseous diffusion plants in Portsmouth (PORTS), Paducah (PGDP), and Oak Ridge. These applications have identified the need for additional model capabilities (such as the treatment of complex terrain and time-variant releases) not present in the original utilities which, in turn, has resulted in numerous modifications to these codes as well as the development of additional, stand-alone postprocessing utilities. Consequently, application of the model has become increasingly complex as the number of executable, input, and output files associated with a single model run has steadily grown. In response to these problems, a streamlined version of the WAKE model has been developed which integrates all calculations that are currently performed by the existing WAKE, and the various post-processing utilities. This report summarizes the efforts involved in developing this revised version of the WAKE model.

Yambert, M.W.; Lombardi, D.A.; Goode, W.D. Jr.; Bloom, S.G.

1998-08-01T23:59:59.000Z

349

Advanced PHEV Engine Systems and Emissions Control Modeling and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

PHEV Engine Systems and Emissions Control Modeling and Analysis Advanced PHEV Engine Systems and Emissions Control Modeling and Analysis 2011 DOE Hydrogen and Fuel Cells Program,...

350

Statistically downscaling from an Earth System Model of Intermediate  

E-Print Network (OSTI)

Statistically downscaling from an Earth System Model of Intermediate Complexity to reconstruct past Earth System Models of Intermediate Complexity (EMICs) have the advantage of allowing transient

Feigon, Brooke

351

Analysis Models and Tools: Systems Analysis of Hydrogen and Fuel...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Analysis Models and Tools: Systems Analysis of Hydrogen and Fuel Cells Analysis Models and Tools: Systems Analysis of Hydrogen and Fuel Cells The Fuel Cell Technologies Office's...

352

White Paper Societal Dimensions of Earth System Modeling  

E-Print Network (OSTI)

on Societal Dimensions of Earth System Modeling July 5, 2011 #12; 2 Executive Summary · A Societal Dimensions of Earth System Modeling workshop was held

353

Model for Configurational Thermodynamics in Ionic Systems  

Science Journals Connector (OSTI)

We develop a formalism to model configurational thermodynamics in ionic systems with multiple anion and cation species. Because cations and anions can be partitioned into two interacting sublattices that do not exchange species, the dimensionality of configuration space is significantly reduced. The result is a model applicable to many important problems in ionic systems. Here we show that the effect of an order-disorder transition in one sublattice on the other depends on how the symmetry is changed through the transition, as well as on the strength of the interactions.

P. D. Tepesch; G. D. Garbulsky; G. Ceder

1995-03-20T23:59:59.000Z

354

Minimal model for avalanches in granular systems  

Science Journals Connector (OSTI)

A nonlinear model for the dynamics of avalanches in granular systems is presented. It is based on mean-field equations for the particle velocity and the angle of the surface of the granular system. The friction force is discontinuous at zero velocity and increases monotonically with the square of the velocity. The model explains the main features of the dynamics of avalanches in analytical detail. It also explains the logarithmic decay behavior of the angle of the pile in the presence of vibrations as found experimentally by Jaeger et al. [Phys. Rev. Lett. 62, 40 (1990)].

Stefan J. Linz and Peter Hnggi

1995-03-01T23:59:59.000Z

355

Modeling of Lean Exhaust Emissions Control Systems | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lean Exhaust Emissions Control Systems Modeling of Lean Exhaust Emissions Control Systems 2002 DEER Conference Presentation: National Renewable Energy Laboratory...

356

Reliability Analysis of Electric Power Systems Using an Object-oriented Hybrid Modeling Approach  

E-Print Network (OSTI)

The ongoing evolution of the electric power systems brings about the need to cope with increasingly complex interactions of technical components and relevant actors. In order to integrate a more comprehensive spectrum of different aspects into a probabilistic reliability assessment and to include time-dependent effects, this paper proposes an object-oriented hybrid approach combining agent-based modeling techniques with classical methods such as Monte Carlo simulation. Objects represent both technical components such as generators and transmission lines and non-technical components such as grid operators. The approach allows the calculation of conventional reliability indices and the estimation of blackout frequencies. Furthermore, the influence of the time needed to remove line overloads on the overall system reliability can be assessed. The applicability of the approach is demonstrated by performing simulations on the IEEE Reliability Test System 1996 and on a model of the Swiss high-voltage grid.

Schlpfer, Markus; Krger, Wolfgang

2012-01-01T23:59:59.000Z

357

Model-based integrated management: applying autonomic systems engineering to network and systems management  

Science Journals Connector (OSTI)

We present a novel approach for integrated management of networks and information systems, based on the specification of executable behaviour models. A model processing plane is introduced, consisting of a number of processing units that together form ... Keywords: ASE, autonomic systems, autonomic systems engineering, behaviour modelling, information systems, management integration, model transformation, model-based integrated management, network management, systems management

Edzard Hofig; Peter H. Deussen

2011-12-01T23:59:59.000Z

358

Cost effectiveness of recycling: A systems model  

SciTech Connect

Highlights: Curbside collection of recyclables reduces overall system costs over a range of conditions. When avoided costs for recyclables are large, even high collection costs are supported. When avoided costs for recyclables are not great, there are reduced opportunities for savings. For common waste compositions, maximizing curbside recyclables collection always saves money. - Abstract: Financial analytical models of waste management systems have often found that recycling costs exceed direct benefits, and in order to economically justify recycling activities, externalities such as household expenses or environmental impacts must be invoked. Certain more empirically based studies have also found that recycling is more expensive than disposal. Other work, both through models and surveys, have found differently. Here we present an empirical systems model, largely drawn from a suburban Long Island municipality. The model accounts for changes in distribution of effort as recycling tonnages displace disposal tonnages, and the seven different cases examined all show that curbside collection programs that manage up to between 31% and 37% of the waste stream should result in overall system savings. These savings accrue partially because of assumed cost differences in tip fees for recyclables and disposed wastes, and also because recycling can result in a more efficient, cost-effective collection program. These results imply that increases in recycling are justifiable due to cost-savings alone, not on more difficult to measure factors that may not impact program budgets.

Tonjes, David J., E-mail: david.tonjes@stonybrook.edu [Department of Technology and Society, College of Engineering and Applied Sciences, Stony Brook University, Stony Brook, NY 11794-3560 (United States); Waste Reduction and Management Institute, School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000 (United States); Center for Bioenergy Research and Development, Advanced Energy Research and Technology Center, Stony Brook University, 1000 Innovation Rd., Stony Brook, NY 11794-6044 (United States); Mallikarjun, Sreekanth, E-mail: sreekanth.mallikarjun@stonybrook.edu [Department of Technology and Society, College of Engineering and Applied Sciences, Stony Brook University, Stony Brook, NY 11794-3560 (United States)

2013-11-15T23:59:59.000Z

359

The development of an integrated model for assessing sustainability of complex systems  

Science Journals Connector (OSTI)

Currently, there are numerous indicators (single and composite) for measuring impacts in the three pillars, though current thinking emphasises the need for system thinking rather than the reductionist concept of pillars. Most existing indices/methods measure single aspects of sustainability and the more integrated indicators are aimed at national or global level assessments. A review of existing indicators, methods and models within the context of complex system sustainability showed that no single existing index, method or model was able to assess sustainability of complex systems. Most fail to account for complex system characteristics, such as system dynamics, interconnections and interdependencies of system components, a system's ability to learn and remember, emergence of novel behaviours, co-evolution, etc. This paper presents the methodology used to develop a new model for assessing sustainability of complex systems based on risk.

Gayathri Babarenda Gamage; Carol Boyle; Ron McDowall

2013-01-01T23:59:59.000Z

360

Dynamic model of hysteretic elastic systems  

Science Journals Connector (OSTI)

A model for the dynamical behavior of a hysteretic elastic system is introduced and studied numerically. This model consists of a chain of hysteretic elastic elements. Each elastic element is a spring with properties that depend on an Ising-like state variable having Brownian dynamics in an energy landscape with structure that is sensitive to the forces which the elastic element must support. A single elastic element is studied carefully, numerically in order to establish its basic behavior. A one dimensional chain of N=500 elastic elements, driven like a resonant bar, is studied numerically. The data from this study are analyzed by the methods employed in analyzing similar experimental data. The behavior of the numerical model compares well with the behavior of physical realizations of hysteretic elastic systems.

Barbara Capogrosso-Sansone and R. A. Guyer

2002-12-05T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Model for a multicomponent quantum system  

Science Journals Connector (OSTI)

In a recent paper, Lai introduced a lattice-gas model. In this paper we generalize Lai's model, making application to various systems such as dilute Heisenberg magnets, higher-spin systems, and a lattice of SU(3) triplets. By a careful consideration of general thermodynamic stability, and by variational arguments, we demonstrate Lai's solution to be incorrect, and in turn produce the correct solution in this case and in other cases including higher-dimensional models. The remaining cases we treat in one dimension by Bethe's ansatz, reducing the problem to coupled integral equations. We locate the singularities of the ground-state energy in the phase plane; and we explicitly calculate the absolute-ground-state energy, excitations above the absolute ground state, and the first correction to the absolute ground state for small concentrations of impurities.

Bill Sutherland

1975-11-01T23:59:59.000Z

362

Oak Ridge Evacuation Modeling System.pub  

NLE Websites -- All DOE Office Websites (Extended Search)

Evacuation Modeling Evacuation Modeling System (OREMS) Research Brief Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract number DE-AC05-00OR22725 Research Areas Freight Flows Passenger Flows Supply Chain Efficiency Transportation: Energy Environment Safety Security Vehicle Technologies T he vulnerability of communities to terrorist inflicted damage at facilities such as dams, power plants, or oil/gas distribution facilities, and others, is partly determined by the ability to avoid impacts. OREMS, or the Oak Ridge Evacuation Modeling System, is a Windows- based software program designed to analyze and evaluate large-scale vehicular emergency evacuations, conduct evacuation time estimation studies, and develop evacuation

363

Final report for grant DE-FG02-06ER64182: "Evaluation and Improvement of the Cloud Resolving Model Component of the Multi-Scale Modeling Framework"  

SciTech Connect

The overall aim of the larger collaborative effort of which this project was part was to evaluate and improve the cloud system resolving model (CSRM) at the heart of the multi-scale modeling framework (MMF). Our task at the University of Colorado our effort was to develop methods that would let us evaluate the performance of cloud-scale models at the ARM SGP site using ARM remote sensing products.

Pincus, Robert [University of Colorado] [University of Colorado

2009-10-13T23:59:59.000Z

364

RELAP5/MOD3 code manual: Code structure, system models, and solution methods. Volume 1  

SciTech Connect

The RELAP5 code has been developed for best estimate transient simulation of light water reactor coolant systems during postulated accidents. The code models the coupled behavior of the reactor coolant system and the core for loss-of-coolant accidents, and operational transients, such as anticipated transient without scram, loss of offsite power, loss of feedwater, and loss of flow. A generic modeling, approach is used that permits simulating a variety of thermal hydraulic systems. Control system and secondary system components are included to permit modeling of plant controls, turbines, condensers, and secondary feedwater systems. RELAP5/MOD3 code documentation is divided into seven volumes: Volume I provides modeling theory and associated numerical schemes.

NONE

1995-08-01T23:59:59.000Z

365

Thermal model of solar absorption HVAC systems  

SciTech Connect

This paper presents a thermal model that describes the performance of solar absorption HVAC systems. The model considers the collector array, the building cooling and heating loads, the absorption chiller and the high temperature storage. Heat losses from the storage tank and piping are included in the model. All of the results presented in the paper are for an array of flat plate solar collectors with black chrome (selective surface) absorber plates. The collector efficiency equation is used to calculate the useful heat output from the array. The storage is modeled as a non-stratified tank with polyurethane foam insulation. The system is assumed to operate continuously providing air conditioning during the cooling season, space heating during the winter and hot water throughout the year. The amount of heat required to drive the chiller is determined from the coefficient of performance of the absorption cycle. Results are presented for a typical COP of 0.7. The cooling capacity of the chiller is a function of storage (generator) temperature. The nominal value is 190 F (88 C) and the range of values considered is 180 F (82 C) to 210 F (99 C). Typical building cooling and heating loads are determined as a function of ambient conditions. Performance results are presented for Sacramento, CA and Washington, D.C. The model described in the paper makes use of National Solar Radiation Data Base (NSRDB) data and results are presented for these two locations. The uncertainties in the NSRDB are estimated to be in a range of 6% to 9%. This is a significant improvement over previously available data. The model makes it possible to predict the performance of solar HVAC systems and calculate quantities such as solar fraction, storage temperature, heat losses and parasitic power for every hour of the period for which data are available.

Bergquam, J.B.; Brezner, J.M. [California State Univ., Sacramento, CA (United States). Dept. of Mechanical Engineering; [Bergquam Energy Systems, Sacramento, CA (United States)

1995-11-01T23:59:59.000Z

366

Magnetic hysteresis in two model spin systems  

Science Journals Connector (OSTI)

A systematic study of hysteresis in model continuum and lattice spin systems is undertaken by constructing a statistical-mechanical theory wherein spatial fluctuations of the order parameter are incorporated. The theory is used to study the shapes and areas of the hysteresis loops as functions of the amplitude (H0) and frequency (?) of the magnetic field. The response of the spin systems to a pulsed magnetic field is also studied. The continuum model that we study is a three-dimensional (?2)2 model with O(N) symmetry in the large-N limit. The dynamics of this model are specified by a Langevin equation. We find that the area A of the hysteresis loop scales as A?H00.66?0.33 for low values of the amplitude and frequency of the magnetic field. The hysteretic response of a two-dimensional, nearest-neighbor, ferromagnetic Ising model is studied by a Monte Carlo simulation on 1010, 2020, and 5050 lattices. The framework that we develop is compared with other theories of hysteresis. The relevance of these results to hysteresis in real magnets is discussed.

Madan Rao; H. R. Krishnamurthy; Rahul Pandit

1990-07-01T23:59:59.000Z

367

Percolation model for relaxation in random systems  

Science Journals Connector (OSTI)

We have measured the magnetic relaxation of several Au:Fe alloys from 10-5 to 104 sec after removing an applied field. The quality and range of the data are sufficient to demonstrate significant deviations from all functions previously used to characterize the dynamics of similar systems. A simple model, activated relaxation of dispersive excitations on a percolation distribution of finite-sized domains, gives excellent agreement with the measurements and may provide a common link between fundamental excitations and observed behavior in random systems.

R. V. Chamberlin and D. N. Haines

1990-10-22T23:59:59.000Z

368

Phonon distribution in a model polariton system  

Science Journals Connector (OSTI)

We consider a simple model polariton problem and show that the phonons in this system will never exhibit sub-Poissonian statistics. We furthermore observe that the probability distribution of the phonons will be classical at all temperatures, although the polariton complex as a whole can have a nonclassical behavior below a threshold temperature whose value will depend on the photon-phonon coupling strength.

Sharmishtha Ghoshal and Ashok Chatterjee

1995-07-01T23:59:59.000Z

369

Modeling needs for very large systems.  

SciTech Connect

Most system performance models assume a point measurement for irradiance and that, except for the impact of shading from nearby obstacles, incident irradiance is uniform across the array. Module temperature is also assumed to be uniform across the array. For small arrays and hourly-averaged simulations, this may be a reasonable assumption. Stein is conducting research to characterize variability in large systems and to develop models that can better accommodate large system factors. In large, multi-MW arrays, passing clouds may block sunlight from a portion of the array but never affect another portion. Figure 22 shows that two irradiance measurements at opposite ends of a multi-MW PV plant appear to have similar irradiance (left), but in fact the irradiance is not always the same (right). Module temperature may also vary across the array, with modules on the edges being cooler because they have greater wind exposure. Large arrays will also have long wire runs and will be subject to associated losses. Soiling patterns may also vary, with modules closer to the source of soiling, such as an agricultural field, receiving more dust load. One of the primary concerns associated with this effort is how to work with integrators to gain access to better and more comprehensive data for model development and validation.

Stein, Joshua S.

2010-10-01T23:59:59.000Z

370

Modelling of Integrated Renewable Energy System  

Science Journals Connector (OSTI)

Energy is supplied in the form of electricity heat or fuels and an energy supply system must guarantee sufficient production and distribution of energy. An energy supply system based on renewable energy can be utilized as integrated renewable energy system (IRES) which can satisfy the energy needs of an area in appropriate & sustainable manner. Given the key role of renewable energy in rural electrification of remote rural areas the IRES for a given area can be modeled & optimized for meeting the energy needs. In the present paper Jaunpur block of Uttaranchal state of India has been selected as remote area. Based upon the data collected the resource potential and energy demand has been calculated & presented. The model on the basis of unit cost of the energy has been optimized using LINDO software 6.10 version. The results indicated that the optimized model has been found to the best choice for meeting the energy needs of the area. The results further indicated that for the above area either an IRES consisting of the above sources can provide a feasible solution in terms of energy fulfillments in the range of EPDF from 1.0 to 0.75.

A. K. Akella; R. P. Saini; M. P. Sharma

2007-01-01T23:59:59.000Z

371

Finite Element Modeling of the Fastening Systems and the Concrete  

E-Print Network (OSTI)

Sleeper and Ballast 0 500 1000 1500 2000 2500 3000 3500 4000 0.0000 0.0002 0.0004 0.0006 0.0008 0 of strands Rail seat area is between 0.39 m to 0.67 m Rail Seat Area Component Modeling: Concrete Sleeper Seat Area Position of concrete surface strain lt = 0.48 m Component Modeling: Concrete Sleeper

Barkan, Christopher P.L.

372

Adaptive model training system and method  

DOE Patents (OSTI)

An adaptive model training system and method for filtering asset operating data values acquired from a monitored asset for selectively choosing asset operating data values that meet at least one predefined criterion of good data quality while rejecting asset operating data values that fail to meet at least the one predefined criterion of good data quality; and recalibrating a previously trained or calibrated model having a learned scope of normal operation of the asset by utilizing the asset operating data values that meet at least the one predefined criterion of good data quality for adjusting the learned scope of normal operation of the asset for defining a recalibrated model having the adjusted learned scope of normal operation of the asset.

Bickford, Randall L; Palnitkar, Rahul M

2014-11-18T23:59:59.000Z

373

Adaptive model training system and method  

DOE Patents (OSTI)

An adaptive model training system and method for filtering asset operating data values acquired from a monitored asset for selectively choosing asset operating data values that meet at least one predefined criterion of good data quality while rejecting asset operating data values that fail to meet at least the one predefined criterion of good data quality; and recalibrating a previously trained or calibrated model having a learned scope of normal operation of the asset by utilizing the asset operating data values that meet at least the one predefined criterion of good data quality for adjusting the learned scope of normal operation of the asset for defining a recalibrated model having the adjusted learned scope of normal operation of the asset.

Bickford, Randall L; Palnitkar, Rahul M; Lee, Vo

2014-04-15T23:59:59.000Z

374

Surface Complexation of Neptunium(V) onto Whole Cells and Cell Components of Shewanella alga: Modeling and Experimental Study  

SciTech Connect

We systematically quantified surface complexation of Np(V) onto whole cells, cell wall, and extracellular polymeric substances (EPS) of Shewanella alga strain BrY. We first performed acid and base titrations and used the mathematical model FITEQL to estimate the concentrations and deprotonation constants of specific surface functional groups. Deprotonation constants most likely corresponded to a carboxyl group not associated with amino acids (pK{sub a} {approx} 5), a phosphoryl site (pK{sub a} {approx} 7.2), and an amine site (pK{sub a} > 10). We then carried out batch sorption experiments with Np(V) and each of the S. alga components as a function of pH. Since significant Np(V) sorption was observed on S. alga whole cells and its components in the pH range 2-5, we assumed the existence of a fourth site: a low-pK{sub a} carboxyl site (pK{sub a} {approx} 2.4) that is associated with amino acids. We used the SPECIATE submodel of the biogeochemical model CCBATCH to compute the stability constants for Np(V) complexation to each surface functional group. The stability constants were similar for each functional group on S. alga bacterial whole cells, cell walls, and EPS, and they explain the complicated sorption patterns when they are combined with the aqueous-phase speciation of Np(V). For pH < 8, the aquo NpO{sub 2}{sup +} species was the dominant form of Np(V), and its log K values for the low-pK{sub a} carboxyl, mid-pK{sub a} carboxyl, and phosphoryl groups were 1.8, 1.8, and 2.5-3.1, respectively. For pH greater than 8, the key surface ligand was amine > XNH{sub 3}{sup +}, which complexed with NpO{sub 2}(CO{sub 3}){sub 3}{sup 5-}. The log K for NpO{sub 2}(CO{sub 3}){sub 3}{sup 5-} complexed onto the amine groups was 3.1-3.9. All of the log K values are similar to those of Np(V) complexes with aqueous carboxyl and N-containing carboxyl ligands. These results help quantify the role of surface complexation in defining actinide-microbiological interactions in the subsurface.

Deo, Randhir P.; Songkasiri, Warinthorn; Rittmann, Bruce E.; Reed, Donald T. (King Mongkut); (AZU); (LANL)

2012-04-30T23:59:59.000Z

375

The National Energy Modeling System: An Overview 1998 - Residential Demand  

Gasoline and Diesel Fuel Update (EIA)

RESIDENTIAL DEMAND MODULE RESIDENTIAL DEMAND MODULE blueball.gif (205 bytes) Housing Stock Submodule blueball.gif (205 bytes) Appliance Stock Submodule blueball.gif (205 bytes) Technology Choice Submodule blueball.gif (205 bytes) Shell Integrity Submodule blueball.gif (205 bytes) Fuel Consumption Submodule The residential demand module (RDM) forecasts energy consumption by Census division for seven marketed energy sources plus solar thermal and geothermal energy. The RDM is a structural model and its forecasts are built up from projections of the residential housing stock and of the energy-consuming equipment contained therein. The components of the RDM and its interactions with the NEMS system are shown in Figure 5. NEMS provides forecasts of residential energy prices, population, and housing starts,

376

Correct Execution of Reconfiguration for Stateful Components  

Science Journals Connector (OSTI)

In component-based software engineering, reconfiguration describes structural changes to the architecture of a component system. For stateful components, not only structural but also behavioural aspects have to be taken into account in reconfiguration. We present a procedure to conduct reconfiguration in systems of concurrent, stateful components that interferes as little as possible with unchanged subsystems. Reconfiguration is described by a plan for adding, deleting and reconnecting components. A plan is executed by a sequence of simple, local steps, which are suitable for implementation in a programming language. We prove that plan execution is indistinguishable from atomic reconfiguration and use this fact for state-space reduction for verifying properties by model checking.

Moritz Hammer; Alexander Knapp

2010-01-01T23:59:59.000Z

377

Decentralized model predictive control of a multiple evaporator HVAC system  

E-Print Network (OSTI)

Vapor compression cooling systems are the primary method used for refrigeration and air conditioning, and as such are a major component of household and commercial building energy consumption. Application of advanced control techniques...

Elliott, Matthew Stuart

2009-05-15T23:59:59.000Z

378

Creep motion of a model frictional system  

Science Journals Connector (OSTI)

We report on the dynamics of a model frictional system submitted to minute external perturbations. The system consists of a chain of sliders connected through elastic springs that rest on an incline. By introducing cyclic expansions and contractions of the springs we observe a reptation of the chain. We account for the average reptation velocity theoretically. The velocity of small systems exhibits a series of plateaus as a function of the incline angle. Due to elastic effects, there exists a critical amplitude below which the reptation is expected to cease. However, rather than a full stop of the creep, we observe in numerical simulations a transition between a continuous-creep and an irregular-creep regime when the critical amplitude is approached. The latter transition is reminiscent of the transition between the continuous and the irregular compaction of granular matter submitted to periodic temperature changes.

Baptiste Blanc; Luis A. Pugnaloni; Jean-Christophe Gminard

2011-12-27T23:59:59.000Z

379

Extreme multistability in a chemical model system  

Science Journals Connector (OSTI)

Coupled systems can exhibit an unusual kind of multistability, namely, the coexistence of infinitely many attractors for a given set of parameters. This extreme multistability is demonstrated to occur in coupled chemical model systems with various types of coupling. We show that the appearance of extreme multistability is associated with the emergence of a conserved quantity in the long-term limit. This conserved quantity leads to a slicing of the state space into manifolds corresponding to the value of the conserved quantity. The state space slices develop as t?? and there exists at least one attractor in each of them. We discuss the dependence of extreme multistability on the coupling and on the mismatch of parameters of the coupled systems.

Calistus N. Ngonghala; Ulrike Feudel; Kenneth Showalter

2011-05-09T23:59:59.000Z

380

Durability of ACERT Engine Components  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

strength data from with FE model "load factors" and stress field to estimate fast fracture strength and fatigue resistance of design component Determination of FE model "load...

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Modeling of thermodynamic and chemical changes in low-temperature geothermal systems  

SciTech Connect

A method was developed to incorporate the transport of several chemical components into a model of the transport of fluid mass and heat within a geothermal system. It was demonstrated that the use of coupled hydrological, thermal and chemical data allows for the determination of field porosities, amounts and regions of cool recharge into the system as well as field permeabilities and the hot reservoir volume. With the additional information a reliable prediction of the long-term cooling rate can be made.

Spencer, A.L.

1986-12-01T23:59:59.000Z

382

CNC programming system for complex components based on KBE within integrated environment of CAD/CAPP/CAM  

Science Journals Connector (OSTI)

To promote the research and development of modern digital and intelligent manufacturing technology and overcome shortcomings of computerized numerical control(CNC) programming for complex components, an innovativ...

Shengwen Zhang; Guicheng Wang; Liang Zhang

2009-03-01T23:59:59.000Z

383

The Architecture of the Earth System Modeling Framework  

Science Journals Connector (OSTI)

The Earth System Modeling Framework (ESMF) project aims to develop a standard software platform for Earth system models based on open-software practices. Target applications range from operational numerical weather prediction to climate system change ... Keywords: earth system, modeling, ESMF, NASA

Chris Hill; Cecelia DeLuca; V. Balaji; Max Suarez; Arlindo da Silva

2004-01-01T23:59:59.000Z

384

Data Mining for Modeling Chiller Systems in Data Centers  

E-Print Network (OSTI)

Data Mining for Modeling Chiller Systems in Data Centers Debprakash Patnaik1 , Manish Marwah2 to the lack of "first principles" models of chiller systems. At the same time, they abound in data due into an actionable dynamic Bayesian network model of the system. This network is then used to explain observed system

385

A non-LTE modeling of narrow emission components of He and Ca lines in optical spectra of CTTS  

E-Print Network (OSTI)

A spectrum of a hot spot, produced by radiation of accretion shock at T Tauri star's surface, has been calculated taking into account non-LTE effects for HeI, HeII, CaI and CaII, using LTE-calculations of spot's atmospheric structure, calculated by Dodin & Lamzin (2012). Assuming that pre-shock gas number density N_0 and its velocity V_0 are the same across the accretion column, we calculated spectra of a system "star + round spot" for a set of N_0, V_0 values and parameters, which characterized the star and the spot. It has been shown that theoretical spectra with an appropriate choice of the parameters reproduce well observed veiling of photospheric absorption lines in optical band as well as profiles and intensities of so-called narrow components of HeII and CaI emission lines in spectra of 9 stars. We found that the accreted gas density N_0>10^{12} cm^{-3} for all considered stars except DK Tau. Observed spectra of 8 stars were succesfully fitted, asuming solar abundance of calcium, but it appeared po...

Dodin, A V; Sitnova, T M

2013-01-01T23:59:59.000Z

386

Kinetic modelling of krypton fluoride laser systems  

SciTech Connect

A kinetic model has been developed for the KrF* rare gas halide laser system, specifically for electron-beam pumped mixtures of krypton, fluorine, and either helium or argon. The excitation produced in the laser gas by the e-beam was calculated numerically using an algorithm checked by comparing the predicted ionization yields in the pure rare gases with their experimental values. The excitation of the laser media by multi-kilovolt x-rays was also modeled and shown to be similar to that produced by high energy electrons. A system of equations describing the transfer of the initial gas excitation into the laser upper level was assembled using reaction rate constants from both experiment and theory. A one-dimensional treatment of the interaction of the laser radiation with the gas was formulated which considered spontaneous and stimulated emission and absorption. The predictions of this model were in good agreement with the fluorescence signals and gain and absorption measured experimentally.

Jancaitis, K.S.

1983-11-01T23:59:59.000Z

387

A feature model of coupling technologies for Earth System Models  

Science Journals Connector (OSTI)

Couplers that link together two or more numerical simulations are well-known abstractions in the Earth System Modeling (ESM) community. In the past decade, reusable software assets have emerged to facilitate scientists in implementing couplers. While there is a large amount of overlap in the features supported by software coupling technologies, their implementations differ significantly in terms of both functional and non-functional properties. Using a domain analysis method called feature analysis, we explore the spectrum of features supported by coupling technologies used to build today's production ESMs.

Rocky Dunlap; Spencer Rugaber; Leo Mark

2013-01-01T23:59:59.000Z

388

National Energy Modeling System (United States) | Open Energy Information  

Open Energy Info (EERE)

National Energy Modeling System (United States) National Energy Modeling System (United States) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: National Energy Modeling System (United States) Focus Area: Biomass Topics: Policy, Deployment, & Program Impact Website: www.eia.gov/oiaf/aeo/overview/ Equivalent URI: cleanenergysolutions.org/content/national-energy-modeling-system-unite Language: English Policies: "Deployment Programs,Regulations" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Technical Assistance Regulations: Utility/Electricity Service Costs The National Energy Modeling System (NEMS) is a computer-based, energy-economy modelling system of the United States through 2030. NEMS

389

Models of National Energy Systems -focusing on biomass energy  

E-Print Network (OSTI)

Models of National Energy Systems - focusing on biomass energy Poul Erik Grohnheit Systems Analysis models · International development of large energy models · Biomass energy · Upstream expansion of the Pan European model for biomass and crops · Basic elements in a crop model for Denmark· Basic elements

390

Modeling of short-term mechanism of arterial pressure control in the cardiovascular system: Object-oriented and acausal approach  

Science Journals Connector (OSTI)

Abstract This letter introduces an alternative approach to modeling the cardiovascular system with a short-term control mechanism published in Computers in Biology and Medicine, Vol. 47 (2014), pp. 104112. We recommend using abstract components on a distinct physical level, separating the model into hydraulic components, subsystems of the cardiovascular system and individual subsystems of the control mechanism and scenario. We recommend utilizing an acausal modeling feature of Modelica language, which allows model variables to be expressed declaratively. Furthermore, the Modelica tool identifies which are the dependent and independent variables upon compilation. An example of our approach is introduced on several elementary components representing the hydraulic resistance to fluid flow and the elastic response of the vessel, among others. The introduced model implementation can be more reusable and understandable for the general scientific community.

Tom Kulhnek; Ji? Kofrnek; Marek Matejk

2014-01-01T23:59:59.000Z

391

Automated Office Systems Support (AOSS) Quality Assurance Model...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

assurance model, including checklists, for activity relative to network and desktop computer support. Automated Office Systems Support (AOSS) Quality Assurance Model More...

392

Effective reuse of coupling technologies for Earth System Models.  

E-Print Network (OSTI)

??Designing and implementing coupled Earth System Models (ESMs) is a challenge for climate scientists and software engineers alike. Coupled models incorporate two or more independent (more)

Dunlap, Ralph S.

2013-01-01T23:59:59.000Z

393

Dynamic model order reduction for shipboard integrated power systems  

Science Journals Connector (OSTI)

The shipboard integrated power system is modeled by a system of differential-algebraic equations with dynamics having time constants varying from fractions of a second to several minutes. Control and simulation of naval shipboard power systems for different ... Keywords: electric ship, integrated power system, model order reduction, shipboard power system, singular perturbation

Sudipta Lahiri; Dagmar Niebur; Harry Kwatny; Gaurav Bajpai

2009-07-01T23:59:59.000Z

394

Transportation System Risk Assessment (TSRA) bounding release model  

SciTech Connect

Transportation System Risk Assessments (TSRAs) document the compliance of proposed shipments of nuclear components with applicable federal regulations as well as the associated risks involved. If a relatively simple bounding analysis can show that the consequences resulting from a worst case scenario are acceptably low, a more time intensive and costly risk analysis can be avoided. Therefore, a bounding release FORTRAN model has been developed to determine the consequences of a worst case non-criticality transportation accident. The consequences of three conservative bounding accidents are determined by the model: (1) direct radiation exposure, (2) airborne release of radiological and/or hazardous solid material, and (3) release of radiological and/or hazardous solid material into a waterway and subsequent uptake by an individual through drinking water. Program output includes the direct radiation exposure (mrem), maximum downwind concentration (mg/m{sup 3}), radiation dose (mrem) received as a result of the postulated airborne release of radiological material, intake (mg) due to inhalation, radiation dose (mrem) received by an individual resulting from a release of radiological material into a waterway and uptake into drinking water, and uptake (mg) due to ingestion. This report documents the methodologies and correlations used in the numerical model to perform the bounding consequence calculations.

Anderson, J.C.

1997-10-01T23:59:59.000Z

395

MODELING VENTILATION SYSTEM RESPONSE TO FIRE  

SciTech Connect

Fires in facilities containing nuclear material have the potential to transport radioactive contamination throughout buildings and may lead to widespread downwind dispersal threatening both worker and public safety. Development and implementation of control strategies capable of providing adequate protection from fire requires realistic characterization of ventilation system response which, in turn, depends on an understanding of fire development timing and suppression system response. This paper discusses work in which published HEPA filter data was combined with CFAST fire modeling predictions to evaluate protective control strategies for a hypothetical DOE non-reactor nuclear facility. The purpose of this effort was to evaluate when safety significant active ventilation coupled with safety class passive ventilation might be a viable control strategy.

Coutts, D

2007-04-17T23:59:59.000Z

396

Linear amplifier model for optomechanical systems  

Science Journals Connector (OSTI)

We model optomechanical systems as linear optical amplifiers. This provides a unified treatment of diverse optomechanical phenomena. We emphasize, in particular, the relationship between ponderomotive squeezing and optomechanically induced transparency, two foci of current research. We characterize the amplifier response to quantum and applied classical fluctuations, both optical and mechanical. Further, we apply these results to establish quantum limits on external force sensing both on and off cavity resonance. We find that the maximum sensitivity attained on resonance constitutes an absolute upper limit, not surpassed when detuning off cavity resonance. The theory is extended to a two-sided cavity with losses and limited detection efficiency.

Thierry Botter; Daniel W. C. Brooks; Nathan Brahms; Sydney Schreppler; Dan M. Stamper-Kurn

2012-01-09T23:59:59.000Z

397

Cellular-automaton model for reactive systems  

Science Journals Connector (OSTI)

A method for constructing a variety of probabilistic lattice-gas cellular automata for chemically reacting systems is described. The microscopic reactive dynamics give rise to a general fourth-order polynomial rate law for the average particle density. The reduction of the microdynamical equations to a discrete or continuous Boltzmann equation is presented. Connection between the linearized Boltzmann equations and a reaction-diffusion macroscopic equation is discussed. As an example of the general formalism a set of cellular automata rules that yield the Schlgl phenomenological model is constructed. Simulation results are presented.

David Dab; Anna Lawniczak; Jean-Pierre Boon; Raymond Kapral

1990-05-14T23:59:59.000Z

398

Modeling of Diesel Exhaust Systems: A methodology to better simulate...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Modeling of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Discussed...

399

Study of degenerate parabolic system modeling the hydrogen displacement in a nuclear waste repository  

E-Print Network (OSTI)

Our goal is the mathematical analysis of a two phase (liquid and gas) two components (water and hydrogen) system modeling the hydrogen displacement in a storage site for radioactive waste. We suppose that the water is only in the liquid phase and is incompressible. The hydrogen in the gas phase is supposed compressible and could be dissolved into the water with the Henry's law. The flow is described by the conservation of the mass of each components. The model is treated without simplified assumptions on the gas density. This model is degenerated due to vanishing terms. We establish an existence result for the nonlinear degenerate parabolic system based on new energy estimate on pressures.

Caro, Florian; Saad, Mazen

2012-01-01T23:59:59.000Z

400

Historical and idealized model experiments: an intercomparison of Earth system models of  

E-Print Network (OSTI)

Historical and idealized model experiments: an intercomparison of Earth system models: an intercomparison of Earth system models of intermediate complexity M. Eby1, A. J. Weaver1, K. Alexander1, K

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Modeling and design of compact microwave components and systems for wireless communications and power transmission  

E-Print Network (OSTI)

-band. Measured insertion loss (IL) K-band loop is under 0.4dB. The K- and W-band antenna array measured broadside gains are 23.6dB at 24.125GHz and 25dB at 76.5GHz with return loss under 9.54dB from 24 to 24.4GHz and 12 dB from 75.1 to 77.3GHz, respectively. Also...

Zepeda, Paola

2004-09-30T23:59:59.000Z

402

The Grid ENabled Integrated Earth System Modelling (GENIE) Framework  

Science Journals Connector (OSTI)

The Grid ENabled Integrated Earth system modelling (GENIE) framework is designed: (i) ... (ii) to tune and execute the resulting Earth system models on a wide variety of platforms including...

Tim Lenton

2013-01-01T23:59:59.000Z

403

Community Earth System Modeling Tutorial 12-16 July 2010  

E-Print Network (OSTI)

Community Earth System Modeling Tutorial 12-16 July 2010 National Center for Atmospheric Research, Boulder, CO APPLICATION DEADLINE: 15 April 2010 The Community Earth System Model (CESM) project

404

Seamlessly Integrating Software & Hardware Modelling for Large-Scale Systems  

E-Print Network (OSTI)

Engineering, with the math- ematical modelling approach, Modelica, to address the software/hardware integration problem. The environment and hardware components are modelled in Modelica and integrated that a software/hardware combination with an 2nd International Workshop on Equation-Based Object-Oriented

Zhao, Yuxiao

405

Modeling Topaz-II system performance  

SciTech Connect

The US acquisition of the Topaz-11 in-core thermionic space reactor test system from Russia provides a good opportunity to perform a comparison of the Russian reported data and the results from computer codes such as MCNP (Ref. 3) and TFEHX (Ref. 4). The comparison study includes both neutronic and thermionic performance analyses. The Topaz II thermionic reactor is modeled with MCNP using actual Russian dimensions and parameters. The computation of the neutronic performance considers several important aspects such as the fuel enrichment and location of the thermionic fuel elements (TFES) in the reactor core. The neutronic analysis included the calculation of both radial and axial power distribution, which are then used in the TFEHX code for electrical performance. The reactor modeled consists of 37 single-cell TFEs distributed in a 13-cm-radius zirconium hydride block surrounded by 8 cm of beryllium metal reflector. The TFEs use 90% enriched [sup 235]U and molybdenum coated with a thin layer of [sup 184]W for emitter surface. Electrons emitted are captured by a collector surface with a gap filled with cesium vapor between the collector and emitter surfaces. The collector surface is electrically insulated with alumina. Liquid NaK provides the cooling system for the TFEs. The axial thermal power distribution is obtained by dividing the TFE into 40 axial nodes. Comparison of the true axial power distribution with that produced by electrical heaters was also performed.

Lee, H.H.; Klein, A.C. (Oregon State Univ., Corvallis (United States))

1993-01-01T23:59:59.000Z

406

Commissioning of the Korean High Heat Flux Test Facility by Using Electron Beam System for Plasma Facing Components  

Science Journals Connector (OSTI)

Divertor and High-Heat-Flux Components / Proceedings of the Twentieth Topical Meeting on the Technology of Fusion Energy (TOFE-2012) (Part 1), Nashville, Tennessee, August 27-31, 2012

Suk-Kwon Kim; Eo Hwak Lee; Jae-Sung Yoon; Dong Won Lee; Duck-Hoi Kim; Seungyon Cho

407

Sequential Logistic Principal Component Analysis(SLPCA): Dimensional Reduction in StreamingMultivariate Binary-State System  

E-Print Network (OSTI)

Sequential Logistic Principal Component Analysis (SLPCA):variables, which is called Logistic PCA (LPCA). We extendPCA can be viewed as Logistic PCA (LPCA). In this work, we

Kang, Zhaoyi; Spanos, Costas J

2014-01-01T23:59:59.000Z

408

A SYSTEMS APPROACH TO MATHEMATICAL MODELING OF INDUSTRIAL PROCESSES  

E-Print Network (OSTI)

/or partial automation of the creative modeling process. Model Generation is a new modeling paradigm designed specifically for rapid modeling of large multi-scale systems in the industrial practice. It proposes model. Keywords: Dynamic and continuous/discrete simulation, computer-aided modeling, symbolic

Linninger, Andreas A.

409

Viable System Model approach for holonic product-driven manufacturing systems  

E-Print Network (OSTI)

Viable System Model approach for holonic product-driven manufacturing systems Carlos Herrera , Sana Control Systems (PDCS) dealing with production planning and control. The framework is based on Viable approach. Keywords: Product-driven systems, intelligent manufacturing systems, viable system model

Boyer, Edmond

410

Research recommendations to the EPA in support of earth system modeling activities  

SciTech Connect

A theme which emerges from our simple considerations is that some well-planned early parametric and sensitivity studies, using current-generation coupled Earth system model components, along with simplistic proxy models of terrestrial biospheric and biogeochemical processes, could furnish valuable information to help guide the development of a longer-term plan for research supporting ESM development. This theme is rooted in the premise that the importance of various ESM component processes can be fully assessed only from the perspective of a complete coupling of that process into the ESM context. That is, the question, ``How well must a given process be modelled``? Cannot be answered in isolation, but rather requires a careful blend of process research and coupled model studies.

Ambrosiano, J.J.; Dannevik, W.P.; Kercher, J.; Miller, N.L.; Penner, J.E.; Rotman, D.

1994-05-06T23:59:59.000Z

411

A model and framework for reliable build systems Derrick Coetzee  

E-Print Network (OSTI)

A model and framework for reliable build systems Derrick Coetzee Anand Bhaskar George Necula, requires prior specific permission. #12;A model and framework for reliable build systems Derrick Coetzee- distributed, incremental, parallel build systems. We de- fine a general model for resources accessed by build

Necula, George

412

A Framework for Earth System Model Application Monitoring  

Science Journals Connector (OSTI)

Earth System Model (ESM) is an important tool for the research on global environmental evolution using numerical approach. Here we present a monitoring method for ESM applications based on "Earth System Model Oriented Integrated Developing Environment". ... Keywords: Earth system models, application monitoring, monitoring framework

Ran Yan; Jieqian Wu; Yibo Xie; You Meng; Depei Qian

2013-12-01T23:59:59.000Z

413

Multi-objective optimization of GENIE Earth system models  

Science Journals Connector (OSTI)

...Multi-objective optimization of GENIE Earth system models Andrew R. Price 1 * Richard...execution and management of Earth system models (ESMs) capable of simulation...Multiobjective tuning of Grid-enabled Earth system models using a non-dominated sorting...

2009-01-01T23:59:59.000Z

414

Traffic flow models and service rules for complex production systems  

E-Print Network (OSTI)

Traffic flow models and service rules for complex production systems C. Ringhofer Abstract We emphasis is given to the implementation of service rules for complex systems, involving multiple product flow type models for complex production systems. Traffic flow models represent, in some sense

Ringhofer, Christian

415

Two dark matter components in dark matter extension of the minimal supersymmetric standard model and the high energy positron spectrum in PAMELA/HEAT data  

SciTech Connect

We present a dark matter extension of the minimal supersymmetric standard model to give the recent trend of the high energy positron spectrum of the PAMELA/HEAT experiments. If the trend is caused indeed by dark matter, the minimal supersymmetric standard model needs to be extended. Here, we minimally extend the minimal supersymmetric standard model with one more dark matter component N together with a heavy lepton E and introduce the coupling e{sub R}E{sub R}{sup c}N{sub R}. This coupling naturally appears in the flipped SU(5) grand unification models. We also present the needed parameter ranges of these additional particles.

Huh, Ji-Haeng; Kim, Jihn E.; Kyae, Bumseok [Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 151-747 (Korea, Republic of)

2009-03-15T23:59:59.000Z

416

The National Energy Modeling System: An Overview 1998 - Appendix:  

Gasoline and Diesel Fuel Update (EIA)

APPENDIX: APPENDIX: BIBLIOGRAPHY The National Energy Modeling System is documented in a series of model documentation reports, available by contacting the National Energy Information Center (202/586-8800). Energy Information Administration, National Energy Modeling System Integrating Module Documentation Report, DOE/EIA-M057(97) (Washington, DC, May 1997). Energy Information Administration, Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065(97) (Washington, DC, December 1996). Energy Information Administration, Model Developer's Appendix to the Model Documentation Report: NEMS Macroeconomic Activity Module, DOE/EIA-M065A (Washington, DC, July 1994). Energy Information Administration, Documentation of the DRI Model of the

417

LBNL Windows & Daylighting Software -- THERM Components  

NLE Websites -- All DOE Office Websites (Extended Search)

Components Components THERM has three basic components: Graphic User Interface: a graphic user interface that allows you to draw a cross section of the product or component for which you are performing thermal calculations. Heat Transfer Analysis: a heat-transfer analysis component that includes: an automatic mesh generator to create the elements for the finite-element analysis, a finite-element solver, an optional error estimator and adaptive mesh generator, and an optional view-factor radiation model. Results: a results displayer. Graphic User Interface THERM has standard graphic capabilities associated with the Microsoft Windows™ operating system. For example, THERM allows you to use: Both mouse and cursor operations; Standard editing features, such as Cut, Copy, Paste, Select All, and Delete;

418

Generic Disposal System Modeling, Fiscal Year 2011 Progress Report |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Disposal System Modeling, Fiscal Year 2011 Progress Report Disposal System Modeling, Fiscal Year 2011 Progress Report Generic Disposal System Modeling, Fiscal Year 2011 Progress Report The UFD Campaign is developing generic disposal system models (GDSM) of different disposal environments and waste form options. Currently, the GDSM team is investigating four main disposal environment options: mined repositories in three geologic media (salt, clay, and granite) and the deep borehole concept in crystalline rock (DOE 2010d). Further developed the individual generic disposal system (GDS) models for salt, granite, clay, and deep borehole disposal environments. GenericDisposalSystModelFY11.pdf More Documents & Publications Integration of EBS Models with Generic Disposal System Models TSPA Model Development and Sensitivity Analysis of Processes Affecting

419

Development and validation of a real-time SAFT-UT system for the inspection of light water reactor components. Semiannual report, April 1984-September 1984. Volume 1  

SciTech Connect

The Pacific Northwest Laboratory is working to design, fabricate, and evaluate a real-time flaw detection and characterization system based on the synthetic aperture focusing technique for ultrasonic testing (SAFT-UT). The system is for inservice inspection of light water reactor components. Included objectives of this program for the Nuclear Regulatory Commission are to develop procedures for system calibration and field operation, to validate the system through laboratory and field inspections, and to generate an engineering data base to support ASME Code acceptance of the technology. This process report covers the programmatic work from April 1984 through September 1984. 58 figs.

Doctor, S.R.; Busse, L.J.; Crawford, S.L.; Hall, T.E.; Gribble, R.P.; Baldwin, A.J.; Van Houten, L.P.

1986-05-01T23:59:59.000Z

420

Development and validation of a real-time SAFT-UT system for the inspection of light water reactor components: Annual report, October 1984-September 1985  

SciTech Connect

The Pacific Northwest Laboratory is working to design, fabricate, and evaluate a real-time flaw detection and characterization system based on the synthetic aperture focusing technique for ultrasonic testing (SAFT-UT). The system is designed to perform inservice inspection of light-water reactor components. Included objectives of this program for the Nuclear Regulatory Commission are to develop procedures for system calibration and field operation, to validate the system through laboratory and field inspections, and to generate an engineering data base to support ASME Code acceptance of the technology. This progress report covers the programmatic work from October 1984 through September 1985.

Doctor, S.R.; Hall, T.E.; Reid, L.D.; Crawford, S.L.; Littlefield, R.J.; Gilbert, R.W.

1987-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Model documentation report: Transportation sector model of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach and development of the National Energy Modeling System (NEMS) Transportation Model (TRAN). The report catalogues and describes the model assumptions, computational methodology, parameter estimation techniques, model source code, and forecast results generated by the model. This document serves three purposes. First, it is a reference document providing a detailed description of TRAN for model analysts, users, and the public. Second, this report meets the legal requirements of the Energy Information Administration (EIA) to provide adequate documentation in support of its statistical and forecast reports (Public Law 93-275, 57(b)(1)). Third, it permits continuity in model development by providing documentation from which energy analysts can undertake model enhancements, data updates, and parameter refinements.

Not Available

1994-03-01T23:59:59.000Z

422

Irreversible Thermodynamics and Smart Materials Systems Modelling. Example of  

E-Print Network (OSTI)

Irreversible Thermodynamics and Smart Materials Systems Modelling. Example of Magnetic Shape Memory mechanisms in smart materials. This procedure is applied to Magnetic Shape Memory Alloys actuators of complex active materials for smart systems. Keywords: Smart material systems, Actuator design

Paris-Sud XI, Université de

423

A benchmark diagnostic model generation system  

Science Journals Connector (OSTI)

It is critical to use automated generators for synthetic models and data given the sparsity of benchmark models for empirical analysis and the cost of generating models by hand. We describe an automated generator for benchmark models that is based on ... Keywords: benchmark model generation, compositional modeling, diagnosis

Jun Wang; Gregory Provan

2010-05-01T23:59:59.000Z

424

Toward self-describing and workflow integrated Earth system models: A coupled atmosphere-ocean modeling system application  

Science Journals Connector (OSTI)

The complexity of Earth system models and their applications is increasing as a consequence of scientific advances, user demand, and the ongoing development of computing platforms, storage systems and distributed high-resolution observation networks. ... Keywords: Coupled Earth system models, Provenance information, ROMS, Scientific workflow, Self-describing models, WRF

Ufuk Utku Turuncoglu; Nuzhet Dalfes; Sylvia Murphy; Cecelia Deluca

2013-01-01T23:59:59.000Z

425

The National Energy Modeling System The  

Gasoline and Diesel Fuel Update (EIA)

2000 2000 (AEO2000) are generated from the National Energy Modeling System (NEMS), developed and main- tained by the Office of Integrated Analysis and Fore- casting of the Energy Information Administration (EIA). In addition to its use in the development of the AEO projections, NEMS is also used in analytical studies for the U.S. Congress and other offices within the Department of Energy. The AEO forecasts are also used by analysts and planners in other govern- ment agencies and outside organizations. The projections in NEMS are developed with the use of a market-based approach to energy analysis. For each fuel and consuming sector, NEMS balances the energy supply and demand, accounting for the eco- nomic competition between the various energy fuels and sources. The time horizon of NEMS is the mid- term period, approximately 20 years in the future. In order to represent the regional differences

426

Isotopic substitution in a model polaronic system  

Science Journals Connector (OSTI)

The effect of isotopic substitution in the excitation spectrum of a model polaronic system is presented. To study this effect we use a three-site many-body Hamiltonian, with two phonon modes, which includes electronic correlations and electron-phonon interactions. Under isotopic substitution, the shift of the lowest excitation energy changes sign for intermediate electron-phonon coupling, coinciding with the onset of polaronic behavior. This manifests as a strong change of the dynamics of polaron tunneling, a behavior opposite to that found in purely phonon excitations. Additionally, a small change in the static polaronic distortion appears under isotopic substitution. This change in the local structure has opposite signs for low and intermediate electron-phonon coupling compared to that found in the strong-coupling limit.

J. Mustre de Leon; R. de Coss; A. R. Bishop; S. A. Trugman

1999-04-01T23:59:59.000Z

427

Solar system tests of brane world models  

E-Print Network (OSTI)

The classical tests of general relativity (perihelion precession, deflection of light, and the radar echo delay) are considered for the Dadhich, Maartens, Papadopoulos and Rezania (DMPR) solution of the spherically symmetric static vacuum field equations in brane world models. For this solution the metric in the vacuum exterior to a brane world star is similar to the Reissner-Nordstrom form of classical general relativity, with the role of the charge played by the tidal effects arising from projections of the fifth dimension. The existing observational solar system data on the perihelion shift of Mercury, on the light bending around the Sun (obtained using long-baseline radio interferometry), and ranging to Mars using the Viking lander, constrain the numerical values of the bulk tidal parameter and of the brane tension.

Christian G. Boehmer; Tiberiu Harko; Francisco S. N. Lobo

2008-02-05T23:59:59.000Z

428

Application of Modelica/MWorks on modeling, simulation and optimization for electro-hydraulic servo valve system  

Science Journals Connector (OSTI)

Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical electric hydraulic and magnetic components which is widely used in electro-hydraulic servo systems such as construction machinery heavy equipment weapon and so forth. The traditional method of modeling and simulation of servo valve is based on block diagram or signal flow which cannot describe the servo valve system from components level nor be used in modeling and simulation of overall servo systems. In the procedure of traditional method computational causality must be involved in modeling of servo valve which is inconvenient to execute modification on components or parameters. Modelica is an object-oriented modeling language which is suited for large complex heterogeneous and multi-domain systems. The key features of Modelica are multi-domain object-oriented and non-causal which are suitable for modeling of servo valve and make the model readable reusable and easy to modify. The simulation results show similar curves with traditional method. This new servo valve modeling and simulation method can provide the engineers a more efficient way to design and optimize a servo valve and an overall servo system.

Ming Li; Guang Meng; Jianping Jing; Jinyang Liu; Zuoyang Zhong

2012-01-01T23:59:59.000Z

429

Generic tool for modelling and simulation of semiconductor intrabay material handling system  

Science Journals Connector (OSTI)

Semiconductor manufacturing facilities are migrating to 300mm technology, necessitating the implementation of automated material handling systems (AMHS) for a variety of ergonomic and safety considerations. A predictive tool, such as software simulation, is needed at the planning stage to estimate the performance of these relatively new systems. Two forms of AMHS are in general use in industry one which handles material within a group of machines (a bay) and one which transfers material between bays. This paper presents a generic tool for modelling and simulation of an intrabay AMHS. The model utilises a library of different blocks representing the different components of any intrabay material handling system, providing a tool that allows rapid building and analysis of an AMHS under different operating conditions. The ease of use of the system means that inexpert users have the ability to generate good models.

K.S. El-Kilany; P. Young; M.A. El Baradie

2004-01-01T23:59:59.000Z

430

Sequential Logistic Principal Component Analysis(SLPCA): Dimensional Reduction in StreamingMultivariate Binary-State System  

E-Print Network (OSTI)

reg ated Sta te B. Building End-Use Energy Modeling Here, weof SLPCA in Building Energy End-Use Modeling. Building End-algorithm in building energy end-use modeling. A PPENDIX

Kang, Zhaoyi; Spanos, Costas J

2014-01-01T23:59:59.000Z

431

Safety-Oriented Design of Component Assemblies using Safety Interfaces  

E-Print Network (OSTI)

FACS 2006 Safety-Oriented Design of Component Assemblies using Safety Interfaces Jonas Elmqvist¨oping, Sweden Abstract This paper promotes compositional reasoning in the context of safety-critical systems, and demonstrates a safety-oriented component model using an application from the automotive industry: an Adaptive

432

Model documentation, Coal Market Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives and the conceptual and methodological approach used in the development of the National Energy Modeling System`s (NEMS) Coal Market Module (CMM) used to develop the Annual Energy Outlook 1998 (AEO98). This report catalogues and describes the assumptions, methodology, estimation techniques, and source code of CMM`s two submodules. These are the Coal Production Submodule (CPS) and the Coal Distribution Submodule (CDS). CMM provides annual forecasts of prices, production, and consumption of coal for NEMS. In general, the CDS integrates the supply inputs from the CPS to satisfy demands for coal from exogenous demand models. The international area of the CDS forecasts annual world coal trade flows from major supply to major demand regions and provides annual forecasts of US coal exports for input to NEMS. Specifically, the CDS receives minemouth prices produced by the CPS, demand and other exogenous inputs from other NEMS components, and provides delivered coal prices and quantities to the NEMS economic sectors and regions.

NONE

1998-01-01T23:59:59.000Z

433

SEESM: Scalable Extensible Earth System Model for Climate Change Science |  

NLE Websites -- All DOE Office Websites (Extended Search)

SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science This SciDAC project will transform an existing, state-of-the-science, third-generation global climate model, the Community Climate System Model (CCSM3), into a first-generation Earth system model that fully simulates the relationships between the physical, chemical, and bio-geochemical processes in the climate system. The model will incorporate new processes necessary to predict future climates based on the specification of greenhouse gas emissions rather than specification of atmospheric concentrations, as is done in present models, which make assumptions about the carbon cycle that are likely not valid. This project will include comprehensive treatments of the processes

434

Predicting Problems Caused by Component Upgrades  

E-Print Network (OSTI)

to guarantee that the system's behavior is preserved across a component replacement. If automated logical

Liskov, Barbara

435

Developing Fully Coupled Dynamical Reactor Core Isolation System Models in RELAP-7 for Extended Station Black-Out Analysis  

SciTech Connect

The reactor core isolation cooling (RCIC) system in a boiling water reactor (BWR) provides makeup water to the reactor vessel for core cooling when the main steam lines are isolated and the normal supply of water to the reactor vessel is lost. It was one of the very few safety systems still available during the Fukushima Daiichi accidents after the tsunamis hit the plants and the system successfully delayed the core meltdown for a few days for unit 2 & 3. Therefore, detailed models for RCIC system components are indispensable to understand extended station black-out accidents (SBO) for BWRs. As part of the effort to develop the new generation reactor system safety analysis code RELAP-7, major components to simulate the RCIC system have been developed. This paper describes the models for those components such as turbine, pump, and wet well. Selected individual component test simulations and a simplified SBO simulation up to but before core damage is presented. The successful implementation of the simplified RCIC and wet well models paves the way to further improve the models for safety analysis by including more detailed physical processes in the near future.

Haihua Zhao; Ling Zou; Hongbin Zhang; David Andrs; Richard Martineau

2014-04-01T23:59:59.000Z

436

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems  

E-Print Network (OSTI)

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems A.J. van der Schaft February 3, 2004 Abstract It is shown how port-based modeling of lumped-parameter complex physical to a geometrically defined class of systems, called port-Hamiltonian systems. These are Hamiltonian systems defined

Schaft, Arjan van der

437

Hybrid Systems and Biology. Continuous and Discrete Modeling for Systems Biology  

E-Print Network (OSTI)

Hybrid Systems and Biology. Continuous and Discrete Modeling for Systems Biology Luca Bortolussi1 (IGA) alberto.policriti@appliedgenomics.org Abstract. Hybrid Systems are dynamical systems presenting both dis- crete and continuous evolution. Hybrid Automata are a formal model for hybrid systems

Bortolussi, Luca

438

Model documentation renewable fuels module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach, and design of the National Energy Modeling System (NEMS) Renewable Fuels Module (RFM) as it relates to the production of the 1995 Annual Energy Outlook (AEO95) forecasts. The report catalogues and describes modeling assumptions, computational methodologies, data inputs, and parameter estimation techniques. A number of offline analyses used in lieu of RFM modeling components are also described. The RFM consists of six analytical submodules that represent each of the major renewable energy resources--wood, municipal solid waste (MSW), solar energy, wind energy, geothermal energy, and alcohol fuels. The RFM also reads in hydroelectric facility capacities and capacity factors from a data file for use by the NEMS Electricity Market Module (EMM). The purpose of the RFM is to define the technological, cost and resource size characteristics of renewable energy technologies. These characteristics are used to compute a levelized cost to be competed against other similarly derived costs from other energy sources and technologies. The competition of these energy sources over the NEMS time horizon determines the market penetration of these renewable energy technologies. The characteristics include available energy capacity, capital costs, fixed operating costs, variable operating costs, capacity factor, heat rate, construction lead time, and fuel product price.

NONE

1995-06-01T23:59:59.000Z

439

Model documentation, Renewable Fuels Module of the National Energy Modeling System  

SciTech Connect

This report documents the objectives, analytical approach, and design of the National Energy Modeling System (NEMS) Renewable Fuels Module (RFM) as it relates to the production of the Annual Energy Outlook 1998 (AEO98) forecasts. The report catalogues and describes modeling assumptions, computational methodologies, data inputs, and parameter estimation techniques. A number of offline analyses used in lieu of RFM modeling components are also described. For AEO98, the RFM was modified in three principal ways, introducing capital cost elasticities of supply for new renewable energy technologies, modifying biomass supply curves, and revising assumptions for use of landfill gas from municipal solid waste (MSW). In addition, the RFM was modified in general to accommodate projections beyond 2015 through 2020. Two supply elasticities were introduced, the first reflecting short-term (annual) cost increases from manufacturing, siting, and installation bottlenecks incurred under conditions of rapid growth, and the second reflecting longer term natural resource, transmission and distribution upgrade, and market limitations increasing costs as more and more of the overall resource is used. Biomass supply curves were also modified, basing forest products supplies on production rather than on inventory, and expanding energy crop estimates to include states west of the Mississippi River using information developed by the Oak Ridge National Laboratory. Finally, for MSW, several assumptions for the use of landfill gas were revised and extended.

NONE

1998-01-01T23:59:59.000Z

440

The National Energy Modeling System: An Overview 2000 - Residential Demand  

Gasoline and Diesel Fuel Update (EIA)

residential demand module (RDM) forecasts energy consumption by Census division for seven marketed energy sources plus solar and geothermal energy. RDM is a structural model and its forecasts are built up from projections of the residential housing stock and of the energy-consuming equipment contained therein. The components of RDM and its interactions with the NEMS system are shown in Figure 5. NEMS provides forecasts of residential energy prices, population, and housing starts, which are used by RDM to develop forecasts of energy consumption by fuel and Census division. residential demand module (RDM) forecasts energy consumption by Census division for seven marketed energy sources plus solar and geothermal energy. RDM is a structural model and its forecasts are built up from projections of the residential housing stock and of the energy-consuming equipment contained therein. The components of RDM and its interactions with the NEMS system are shown in Figure 5. NEMS provides forecasts of residential energy prices, population, and housing starts, which are used by RDM to develop forecasts of energy consumption by fuel and Census division. Figure 5. Residential Demand Module Structure RDM incorporates the effects of four broadly-defined determinants of energy consumption: economic and demographic effects, structural effects, technology turnover and advancement effects, and energy market effects. Economic and demographic effects include the number, dwelling type (single-family, multi-family or mobile homes), occupants per household, and location of housing units. Structural effects include increasing average dwelling size and changes in the mix of desired end-use services provided by energy (new end uses and/or increasing penetration of current end uses, such as the increasing popularity of electronic equipment and computers). Technology effects include changes in the stock of installed equipment caused by normal turnover of old, worn out equipment with newer versions which tend to be more energy efficient, the integrated effects of equipment and building shell (insulation level) in new construction, and in the projected availability of even more energy-efficient equipment in the future. Energy market effects include the short-run effects of energy prices on energy demands, the longer-run effects of energy prices on the efficiency of purchased equipment and the efficiency of building shells, and limitations on minimum levels of efficiency imposed by legislated efficiency standards.

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Hybrid principal component analysis and support vector machine model for predicting the cost performance of commercial building projects using pre-project planning variables  

Science Journals Connector (OSTI)

An accurate prediction of project performance in the pre-project planning stage especially prediction of cost performance is paramount to project stakeholders. The aim of this study is to propose and validate a hybrid predictive model for cost performance of commercial building projects using 64 variables related to the levels of definition in the pre-project planning stage. The proposed model integrates a support vector regression (SVR) model with principal component analysis (PCA). The proposed method was analyzed and validated based on 84 sets of data from an equal number of commercial building projects. Additionally, the result obtained using the proposed PCASVR model was compared with four other data-mining techniques. Experimental results revealed that the proposed PCASVR model is able to predict with high accuracy the cost performance of commercial building projects in the pre-project planning stage and is more efficient than the other four models.

Hyojoo Son; Changmin Kim; Changwan Kim

2012-01-01T23:59:59.000Z

442

A Modelica-based Model Library for Building Energy and Control Systems  

SciTech Connect

This paper describes an open-source library with component models for building energy and control systems that is based on Modelica, an equation-based objectoriented language that is well positioned to become the standard for modeling of dynamic systems in various industrial sectors. The library is currently developed to support computational science and engineering for innovative building energy and control systems. Early applications will include controls design and analysis, rapid prototyping to support innovation of new building systems and the use of models during operation for controls, fault detection and diagnostics. This paper discusses the motivation for selecting an equation-based object-oriented language. It presents the architecture of the library and explains how base models can be used to rapidly implement new models. To demonstrate the capability of analyzing novel energy and control systems, the paper closes with an example where we compare the dynamic performance of a conventional hydronic heating system with thermostatic radiator valves to an innovative heating system. In the new system, instead of a centralized circulation pump, each of the 18 radiators has a pump whose speed is controlled using a room temperature feedback loop, and the temperature of the boiler is controlled based on the speed of the radiator pump. All flows are computed by solving for the pressure distribution in the piping network, and the controls include continuous and discrete time controls.

Wetter, Michael

2009-04-07T23:59:59.000Z

443

A complete desktop phase-equilibria software package using object-oriented programming and the component object model  

E-Print Network (OSTI)

published data and observations. It has the following fomi: ls 10(o+?) I P " (2 4) Where F, is thc component characterization factor given by: F, =(i, ? (2 5) With: , . (2. 6) TD Tc The a and c coefficients dependent on pressure are given by: a =1...

Garcia, Jairo Medina

2002-01-01T23:59:59.000Z

444

The effect of component efficiency and operating conditions on the 50-kW dish Stirling system in Riyadh, Saudia Arabia  

SciTech Connect

This paper deals with the development of a weather data base and the performance prediction of a 50-kW dish Stirling system. An analysis of direct solar insolation data for 1985 from the site in Riyadh, Saudi Arabia was made to determine the available solar energy. A parameter study was done of the effects of component efficiencies and operating conditions on instantaneous and yearly average system efficiency using the prepared weather data. The system performance was found to be most affected by wind, mirror reflectivity, and exact placement of the receiver in the focal point of the mirror.

Noyes, G.W. (Deutsche Forshungsanstait fur Luft-und Raumfahrt, Inst. fur Technische Thermodynamik, Pfaffenwaldrign 38-40, 7000 Stuttgart 80 (DE))

1990-11-01T23:59:59.000Z

445

Policy Analysis Modeling System (PAMS) | Open Energy Information  

Open Energy Info (EERE)

Analysis Modeling System (PAMS) Analysis Modeling System (PAMS) (Redirected from Policy Analysis Modeling System) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Policy Analysis Modeling System Agency/Company /Organization: Lawrence Berkeley National Laboratory Sector: Energy Focus Area: Buildings, Energy Efficiency Topics: Policies/deployment programs Resource Type: Software/modeling tools User Interface: Spreadsheet Website: clasponline.org/ResourcesTools/Tools/PolicyAnalysisModelingSystem Equivalent URI: cleanenergysolutions.org/content/policy-analysis-modeling-system-pams Regulations: "Appliance & Equipment Standards and Required Labeling,Net Metering & Interconnection" is not in the list of possible values (Agriculture Efficiency Requirements, Appliance & Equipment Standards and Required Labeling, Audit Requirements, Building Certification, Building Codes, Cost Recovery/Allocation, Emissions Mitigation Scheme, Emissions Standards, Enabling Legislation, Energy Standards, Feebates, Feed-in Tariffs, Fuel Efficiency Standards, Incandescent Phase-Out, Mandates/Targets, Net Metering & Interconnection, Resource Integration Planning, Safety Standards, Upgrade Requirements, Utility/Electricity Service Costs) for this property.

446

DOE Hydrogen Analysis Repository: Policy Office Electricity Modeling System  

NLE Websites -- All DOE Office Websites (Extended Search)

Policy Office Electricity Modeling System (POEMS) Policy Office Electricity Modeling System (POEMS) Project Summary Full Title: Policy Office Electricity Modeling System (POEMS) Project ID: 93 Principal Investigator: Lessly Goudarzi Purpose Designed and built by OnLocation specifically to address electricity industry restructuring issues Performer Principal Investigator: Lessly Goudarzi Organization: OnLocation, Inc. Address: Suite 300, 501 Church Street Vienna, VA 22180 Telephone: 703-938-5151 Email: goudarzi@onlocationinc.com Project Description Type of Project: Model Category: Energy Infrastructure Products/Deliverables Description: National Transmission Grid Study - Appendix A Publication Title: Policy Office Electricty Modeling System (POEMS) and Documentation for Transmission Analysis (PDF 461 KB) Download Adobe Reader.

447

NREL: Regional Energy Deployment System (ReEDS) Model - Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional Energy Deployment System (ReEDS) Model Energy Analysis ReEDS Regional Energy Deployment System Model Regional Energy Deployment System (ReEDS) Model Energy Analysis ReEDS Regional Energy Deployment System Model Search More Search Options Site Map Printable Version Publications The following are publications - including technical reports, journal articles, conference papers, and posters - focusing on the Wind Deployment System (WinDS) and Regional Energy Deployment System (ReEDS) models. Technical Reports Eurek, K.; Denholm, P.; Margolis, R.; Mowers, M. (2013). Sensitivity of Utility-Scale Solar Deployment Projections in the SunShot Vision Study to Market and Performance Assumptions. 55 pp.; NREL Report No. TP-6A20-55836. Martinez, A.; Eurek, K.; Mai, T.; Perry, A. (2013). Integrated Canada-U.S. Power Sector Modeling with the Regional Energy Deployment System (ReEDS).

448

Conceptual Models of Geothermal Systems - Introduction | Open Energy  

Open Energy Info (EERE)

Conceptual Models of Geothermal Systems - Introduction Conceptual Models of Geothermal Systems - Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Conceptual Models of Geothermal Systems - Introduction Abstract The key to the successful exploration, development (incl. drilling) and utilization of any type of geothermal system is a clear definition and understanding of the nature and characteristics of the system in question. This is best achieved through the development of a conceptual model of the system, which is a descriptive or qualitative model incorporating, and unifying, the essential physical features of the system. Conceptual models are mainly based on analysis of geological and geophysical information, temperature and pressure data, information on reservoir properties as well

449

Systems Modeling, Simulation and Material Operating Requirements for Chemical Hydride Based Hydrogen Storage  

SciTech Connect

Research on ammonia borane (AB, NH3BH3) has shown it to be a promising material for chemical hydride based hydrogen storage. AB was selected by DOE's Hydrogen Storage Engineering Center of Excellence (HSECoE) as the initial chemical hydride of study because of its high hydrogen storage capacity (up to 19.6% by weight for the release of {approx}2.5 molar equivalents of hydrogen gas) and its stability under typical ambient conditions. A new systems concept based on augers, ballast tank, hydrogen heat exchanger and H2 burner was designed and implemented in simulation. In this design, the chemical hydride material was assumed to produce H2 on the augers itself, thus minimizing the size of ballast tank and reactor. One dimensional models based on conservation of mass, species and energy were used to predict important state variables such as reactant and product concentrations, temperatures of various components, flow rates, along with pressure, in various components of the storage system. Various subsystem components in the models were coded as C language S-functions and implemented in Matlab/Simulink environment. The control variable AB (or alane) flow rate was determined through a simple expression based on the ballast tank pressure, H2 demand from the fuel cell and hydrogen production from AB (or alane) in the reactor. System simulation results for solid AB, liquid AB and alane for both steady state and transient drive cycle cases indicate the usefulness of the model for further analysis and prototype development.

Devarakonda, Maruthi N.; Brooks, Kriston P.; Ronnebro, Ewa; Rassat, Scot D.

2012-02-01T23:59:59.000Z

450

Cognitive Modeling Carsten Pfeffer Dynamical Systems Approaches to  

E-Print Network (OSTI)

Cognitive Modeling Carsten Pfeffer Dynamical Systems Approaches to Cognition Carsten Pfeffer Universität Bremen December 1st, 2014 December 1st, 2014 1/30 #12;Cognitive Modeling Carsten Pfeffer Introduction Physical Symbol Systems December 1st, 2014 2/30 #12;Cognitive Modeling Carsten Pfeffer

Bremen, Universität

451

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network (OSTI)

1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

452

Hybrid Power System Simulation Model | Open Energy Information  

Open Energy Info (EERE)

Hybrid Power System Simulation Model Hybrid Power System Simulation Model Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Hybrid Power System Simulation Model Focus Area: Renewable Energy Topics: System & Application Design Website: www.umass.edu/windenergy/OLD_SITE/projects/hybrid2/ Equivalent URI: cleanenergysolutions.org/content/hybrid-power-system-simulation-model, Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance This tool performs detailed long-term performance and economic analysis on a wide variety of hybrid power systems. It is a probabilistic/time-series computer model, using time-series data for loads, wind speed, solar insolation, temperature, and the power system designed or selected by the user, to predict the performance of the hybrid power system. An economic

453

1Earth System Models of Intermediate Complexity: Closing the Gap in the Spectrum of Climate System  

E-Print Network (OSTI)

system models of intermediate complexity (EMICs) is discussed. It be-comes apparent that there exists a

Martin Claussen; Michel Crucifix; Thierry Fichefet; Andrey Ganopolski; Huges Goosse; Vladimir Petoukhov; Thomas Stocker; Peter Stone; Zhaoming Wang; Andrew Weaver; Susanne L. Weber

454

Port Hamiltonian Formulation of Infinite Dimensional Systems I. Modeling  

E-Print Network (OSTI)

Port Hamiltonian Formulation of Infinite Dimensional Systems I. Modeling Alessandro Macchelli the modeling of distributed parameter systems in port Hamilto- nian form are presented. The classical finite dimensional port Hamiltonian formulation of a dynamical system is generalized in order to cope

Schaft, Arjan van der

455

Mobile Model-Based Bridge Lifecycle Management Systems  

E-Print Network (OSTI)

Mobile Model-Based Bridge Lifecycle Management Systems Amin Hammad* , Cheng Zhang, Yongxin Hu, Montreal, Quebec, Canada H3G 1T7, Canada Abstract: This paper discusses the requirements for developing Mobile Model-based Bridge Lifecycle Management Systems (MMBLMSs). These new systems should link all

Hammad, Amin

456

Performance Modeling and Access Methods for Temporal Database Management Systems  

E-Print Network (OSTI)

implementation issues. Database systems with temporal support maintain history data on line together with current. Performance Modeling and Access Methods for Temporal Database Management Systems TR86-018 August. #12;Performance Modeling and Access Methods for Temporal Database Management Systems by Ilsoo Ahn

North Carolina at Chapel Hill, University of

457

Towards a theory for cyber-physical systems modeling  

Science Journals Connector (OSTI)

Modeling the heterogeneous composition of physical, computational and communication systems is an important challenge in engineering Cyber-Physical Systems (CPS), where the major sources of heterogeneity are causality, time semantics, and different physical ... Keywords: cyber-physical systems, formalization, heterogeneous composition, model-based engineering

Gabor Simko; Tihamer Levendovszky; Miklos Maroti; Janos Sztipanovits

2014-04-01T23:59:59.000Z

458

A component-based collaboration infrastructure  

E-Print Network (OSTI)

-through in building reusable sys- tems. The popularity of di?erent component models in industry has demonstrated the attractions and power of CBD. Further more, modern object-oriented languages 18 such as Java and .Net provide direct support on component... . . . . . . . . . . . . . . . . . . . . . . . . . . 20 B. Shared Component Model . . . . . . . . . . . . . . . . . . 21 1. Modeling Shared Data . . . . . . . . . . . . . . . . . . 21 2. Java Embodiment . . . . . . . . . . . . . . . . . . . . 23 a. Shared Component . . . . . . . . . . . . . . . . . 23 b...

Yang, Yi

2006-04-12T23:59:59.000Z

459

Collaborative Research: Towards Advanced Understanding and Predictive Capability of Climate Change in the Arctic using a High-Resolution Regional Arctic Climate System Model  

SciTech Connect

Primary activities are reported in these areas: climate system component studies via one-way coupling experiments; development of the Regional Arctic Climate System Model (RACM); and physical feedback studies focusing on changes in Arctic sea ice using the fully coupled model.

Lettenmaier, Dennis P

2013-04-08T23:59:59.000Z

460

System modeling using the Parallel DEVS formalism and the Modelica language  

Science Journals Connector (OSTI)

The analysis and identification of the requirements needed to describe P-DEVS models using the Modelica language are discussed in this manuscript. A new free Modelica package, named DEVSLib, is presented. It facilitates the description of discrete-event models according to the Parallel DEVS formalism and provides components to interface with continuous-time models, which can be composed using other Modelica libraries. In addition, \\{DEVSLib\\} contains models implementing Quantized State System (QSS) integration methods. The model definition capabilities provided by \\{DEVSLib\\} are similar to the ones in the simulation environments specifically designed for supporting the DEVS formalism. The main additional advantage of \\{DEVSLib\\} is that it can be used together with other Modelica libraries in order to compose multi-domain and multi-formalism hybrid models. \\{DEVSLib\\} is included in the \\{DESLib\\} Modelica library, which is freely available for download at http://www.euclides.dia.uned.es.

Victorino Sanz; Alfonso Urquia; Franois E. Cellier; Sebastian Dormido

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

IMMPACT: A System for Interactive Proximity Queries On Massive Models  

E-Print Network (OSTI)

it for interaction with a CAD model of a power plant consisting of over 15 million triangles. We are able to perform e.g. submarines, airplanes, power plants etc.. A key component of such environments is the ability, ONR Young Investigator Award, Honda and Intel 1 #12;1 Introduction The current technology for virtual

North Carolina at Chapel Hill, University of

462

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems  

E-Print Network (OSTI)

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

Newcastle upon Tyne, University of

463

Causes and implications of persistent atmospheric carbon dioxide biases in Earth System Models  

E-Print Network (OSTI)

2013), The Community Earth System Model: A framework forin the Norwegian Earth System Model (NorESM), Geosci. Modelsimulations from CMIP5 Earth system models and comparison

2014-01-01T23:59:59.000Z

464

Modeling fuzzy state space of reheater system for simulation and analysis  

Science Journals Connector (OSTI)

Reheater is one of the important heat exchange components in a high capacity power plant of a boiler system. The aim of this study is to improve heat transfer of a reheater system. The method is to maximize steam production and at the same time keeping variables within constraints. Fuzzy arithmetic is a powerful tool used to solve engineering problems with uncertain parameters. Therefore in order to determine heat transfer efficiency the state space of reheater is simulated using fuzzy arithmetic by taking into account the uncertainties in the reheater system. The uncertain model parameters and the model inputs are represented by fuzzy numbers with their shape derived from quasi-Gaussian function. Finally this paper discusses how the mathematical model can be manipulated in order to produce maximum heat transfer with least loss of energy. Furthermore the improvement of the reheater efficiency and the quantification of the heat supplied parameters are presented in this paper.

2014-01-01T23:59:59.000Z

465

MODELING SECURITY IN CYBER-PHYSICAL SYSTEMS  

E-Print Network (OSTI)

novel aspects of networked systems that include integrating dis- tributed computing systems with monitoring and controlling entities in the physical environment. For example, in real-time control systems stations. Other examples include smart grid systems and supervisory control and data acquisition (SCADA

Burmester, Mike

466

Battery Thermal Management System Design Modeling (Presentation)  

SciTech Connect

Presents the objectives and motivations for a battery thermal management vehicle system design study.

Kim, G-H.; Pesaran, A.

2006-10-01T23:59:59.000Z

467

Using the Model Coupling Toolkit to couple earth system models  

Science Journals Connector (OSTI)

Continued advances in computational resources are providing the opportunity to operate more sophisticated numerical models. Additionally, there is an increasing demand for multidisciplinary studies that include interactions between different physical ... Keywords: COAMPS, Model Coupling Toolkit, Model coupling, ROMS, SWAN, Sparse matrix interpolation

John C. Warner; Natalie Perlin; Eric D. Skyllingstad

2008-10-01T23:59:59.000Z

468

SEMANTIC LEARNING MODEL AND EXTENDED STUDENT MODEL: TOWARDS AN AHAM-BASED ADAPTIVE SYSTEM  

E-Print Network (OSTI)

SEMANTIC LEARNING MODEL AND EXTENDED STUDENT MODEL: TOWARDS AN AHAM-BASED ADAPTIVE SYSTEM Hend hypermedia systems, we distinguish AHAM as the most popular reference model which is based on the Dexter hoc integration of the AHAM's user's model as well as the IMS/LIP and IEEE/PAPI standards. KEY WORDS

Paris-Sud XI, Université de

469

Perceptual-components architecture for digital video  

Science Journals Connector (OSTI)

A perceptual-components architecture for digital video partitions the image stream into signal components in a manner analogous to that used in the human visual system. These...

Watson, Andrew B

1990-01-01T23:59:59.000Z

470

Numerical Modelling of Geothermal Systems a Short Introduction | Open  

Open Energy Info (EERE)

Numerical Modelling of Geothermal Systems a Short Introduction Numerical Modelling of Geothermal Systems a Short Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Numerical Modelling of Geothermal Systems a Short Introduction Authors Mauro Cacace, Björn Onno Kaiser and Yvonne Cherubini Published Helmholtz Association, The date "N/A" was not understood.The date "N/A" was not understood. DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Numerical Modelling of Geothermal Systems a Short Introduction Citation Mauro Cacace,Björn Onno Kaiser,Yvonne Cherubini. N/A. Numerical Modelling of Geothermal Systems a Short Introduction. N/A. Helmholtz Association. N/Ap. Retrieved from "http://en.openei.org/w/index.php?title=Numerical_Modelling_of_Geothermal_Systems_a_Short_Introduction&oldid=688986"

471

Dynamic Model for Assessing Impact of Regeneration Actions on System Availability: Application to Weapon Systems  

E-Print Network (OSTI)

to Weapon Systems Maxime Monnin, LAMIH, University of Valenciennes Benoit Iung, PhD, CRAN, Nancy University of unavailability. Military weapon systems can become unavailable due to system failures or damage to the system. This paper aims to define principles for weapon systems modeling that integrate both system failure

Paris-Sud XI, Université de

472

Dependable Systems of Systems PCE4: Models of Organisational Failure1 IST-1999-11585  

E-Print Network (OSTI)

Dependable Systems of Systems PCE4: Models of Organisational Failure1 DSoS IST-1999 Report Version: Deliverable (PCE4) Report Preparation Date: 1 December 2002 Classification: Public Technology" Programme (1998- 2002) #12;Dependable Systems of Systems PCE4: Models of Organisational Failure2

Newcastle upon Tyne, University of

473

The Regional Ocean Modeling System (ROMS) 4-dimensional variational data assimilation systems  

E-Print Network (OSTI)

The Regional Ocean Modeling System (ROMS) 4-dimensional variational data assimilation systems Part during ocean data assimilation was explored when the Regional Ocean Modeling System (ROMS) 4-dimensional. This is the third part of a three part series describing the ROMS 4D- Var systems. ? 2011 Elsevier Ltd. All rights

Costa, Daniel P.

474

Model based control system design using sysML, simulink, and computer algebra system  

Science Journals Connector (OSTI)

The Systems Modeling Language (SysML) is a standard, general-purpose, modeling language formodel-based systems engineering (MBSE). SysML supports the specification, analysis, and design of a broad range of complex systems such as control systems. The ...

Takashi Sakairi; Eldad Palachi; Chaim Cohen; Yoichi Hatsutori; Junya Shimizu; Hisashi Miyashita

2013-01-01T23:59:59.000Z

475

Utility system integration and optimization models for nuclear power management  

E-Print Network (OSTI)

A nuclear power management model suitable for nuclear utility systems optimization has been developed for use in multi-reactor fuel management planning over periods of up to ten years. The overall utility planning model ...

Deaton, Paul Ferris

1973-01-01T23:59:59.000Z

476

The Inverse Ocean Modeling System. Part I: Implementation  

Science Journals Connector (OSTI)

The Inverse Ocean Modeling (IOM) system constructs and runs weak-constraint, four-dimensional variational data assimilation (W4DVAR) for any dynamical model and any observing array. The dynamics and the observing algorithms may be nonlinear but ...

A. F. Bennett; B. S. Chua; B. L. Pflaum; M. Erwig; Z. Fu; R. D. Loft; J. C. Muccino

2008-09-01T23:59:59.000Z

477

Modeling and Analysis of CSP Systems (Fact Sheet)  

SciTech Connect

Fact sheet describing NREL CSP Program capabilities in the area of modeling and analysis of CSP systems: assessing the solar resource, predicting performance and cost, studying environmental impact, and developing modeling software packages.

Not Available

2010-08-01T23:59:59.000Z

478

Annotated Production Systems: A Model for Skill Acquisition  

E-Print Network (OSTI)

Annotated Production Systems provide a procedural model for skill acquisition by augmenting a production model of the skill with formal commentary describing plans, bugs, and interraltionships between various productions. ...

Goldstein, Ira P.

1977-02-01T23:59:59.000Z

479

The MAGS Regional Climate Modeling System: CRCM-MAGS  

Science Journals Connector (OSTI)

The Mackenzie GEWEX Study (MAGS) regional climate modeling system (denoted CRCM-MAGS) is a developmental version of the Canadian Regional Climate Model (CRCM) tailored for use over North America. It is compose...

Murray MacKay; Paul Bartlett; Ed Chan

2008-01-01T23:59:59.000Z

480

Systemic risk: the dynamics of model banking systems  

Science Journals Connector (OSTI)

...is, to study systemic risk. Recent events have...100 experts on systemic risk from 22 countries, representing banks, regulators, investment firms, US national laboratories...parallels between systemic risk in the financial sector...its interaction with political and other constraints...

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modeling system component" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Project Profile: System Advisor Model Enhancements for CSP  

Energy.gov (U.S. Department of Energy (DOE))

Since the first public release, over 35,000 people representing manufacturers, project developers, academic researchers, and policy makers have downloaded the System Advisor Model (SAM). Manufacturers are using the model to evaluate the impact of efficiency improvements or cost reductions in their products on the cost of energy from installed systems. Project developers use SAM to evaluate different system configurations to maximize earnings from electricity sales. Policy makers and designers use the model to experiment with different incentive structures.

482

Temperature Modeling in Activated Sludge Systems: A Case Study  

E-Print Network (OSTI)

Temperature Modeling in Activated Sludge Systems: A Case Study Jacek Makinia, Scott A. Wells, Piotr Zima ABSTRACT: A model of temperature dynamics was developed as part of a general model</