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Note: This page contains sample records for the topic "real-time dynamic simulation" 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.


1

Real time wind turbine simulator.  

E-Print Network (OSTI)

??A novel dynamic real-time wind turbine simulator (WTS) is developed in this thesis, which is capable of reproducing dynamic behavior of real wind turbine. The… (more)

Gong, Bing

2007-01-01T23:59:59.000Z

2

Real-time dynamic simulator for the Topaz II reactor power system  

SciTech Connect

A dynamic simulator of the TOPAZ II reactor system has been developed for the Nuclear Electric Propulsion Space Test Program. The simulator is a self-contained IBM-PC compatible based system that executes at a speed faster than real-time. The simulator combines first-principle modeling and empirical correlations in its algorithm to attain the modeling accuracy and computational through-put that are required for real-time execution. The overall execution time of the simulator for each time step is 15 ms when no data is written to the disk, and 18 ms when nine double precision data points are written to the disk once in every time step. The simulation program has been tested and it is able to handle a step decrease of $8 worth of reactivity. It also provides simulation of fuel, emitter, collector, stainless steel, and ZrH moderator failures. Presented in this paper are the models used in the calculations, a sample simulation session, and a discussion of the performance and limitations of the simulator. The simulator has been found to provide realistic real-time dynamic response of the TOPAZ II reactor system under both normal and causality conditions.

Kwok, K.S.

1994-10-01T23:59:59.000Z

3

Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint  

DOE Green Energy (OSTI)

The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

Singh, M.; Muljadi, E.; Gevorgian, V.

2012-06-01T23:59:59.000Z

4

Real Time Simulation of Power Grid Disruptions  

Science Conference Proceedings (OSTI)

DOE-OE and DOE-SC workshops (Reference 1-3) identified the key power grid problem that requires insight addressable by the next generation of exascale computing is coupling of real-time data streams (1-2 TB per hour) as the streams are ingested to dynamic models. These models would then identify predicted disruptions in time (2-4 seconds) to trigger the smart grid s self healing functions. This project attempted to establish the feasibility of this approach and defined the scientific issues, and demonstrated example solutions to important smart grid simulation problems. These objectives were accomplished by 1) using the existing frequency recorders on the national grid to establish a representative and scalable real-time data stream; 2) invoking ORNL signature identification algorithms; 3) modeling dynamically a representative region of the Eastern interconnect using an institutional cluster, measuring the scalability and computational benchmarks for a national capability; and 4) constructing a prototype simulation for the system s concept of smart grid deployment. The delivered ORNL enduring capability included: 1) data processing and simulation metrics to design a national capability justifying exascale applications; 2) Software and intellectual property built around the example solutions; 3) demonstrated dynamic models to design few second self-healing.

Chinthavali, Supriya [ORNL; Dimitrovski, Aleksandar D [ORNL; Fernandez, Steven J [ORNL; Groer, Christopher S [ORNL; Nutaro, James J [ORNL; Olama, Mohammed M [ORNL; Omitaomu, Olufemi A [ORNL; Shankar, Mallikarjun [ORNL; Spafford, Kyle L [ORNL; Vacaliuc, Bogdan [ORNL

2012-11-01T23:59:59.000Z

5

Analysis of Wind Generation System by Real-Time Simulation  

Science Conference Proceedings (OSTI)

Due to the demand of green energy, the number of wind turbines installed has been increased drastically worldwide. Comparing with the traditional utility generation systems, the dynamic characteristic and response of wind farms are totally different. ... Keywords: Doubly-fed induction generator, real-time simulation, PC cluster-based real-time simulator, wind farm

H. C. Su; G. W. Chang; H. M. Huang; K. K. Jen; G. C. Chung; G. Z. Wu

2012-06-01T23:59:59.000Z

6

Towards real-time dynamic spectrum auctions  

Science Conference Proceedings (OSTI)

In this paper, we propose a low-complexity auction framework to distribute spectrum in real-time among a large number of wireless users with dynamic traffic. Our design consists of a compact and highly expressive bidding format, two pricing models to ... Keywords: Algorithms, Auctions, Spectrum

Sorabh Gandhi; Chiranjeeb Buragohain; Lili Cao; Haitao Zheng; Subhash Suri

2008-03-01T23:59:59.000Z

7

Residential Real-time Price Response Simulation  

Science Conference Proceedings (OSTI)

The electric industry is gaining experience with innovative price responsive demand pilots and limited roll-outs to customers. One of these pilots is investigating real-time pricing signals to engage end-use systems and local distributed generation and storage in a distributed optimization process. Attractive aspects about the approach include strong scalability characteristics, simplified interfaces between automation devices, and the adaptability to integrate a wide variety of devices and systems. Experience in this nascent field is revealing a rich array of for engineering decisions and the application of complexity theory. To test the decisions, computer simulations are used to reveal insights about design, demand elasticity, and the limits of response (including consumer fatigue). Agent-based approaches lend themselves well in the simulation to modeling the participation and interaction of each piece of equipment on a distribution feeder. This paper discusses rate design and simulation experiences at the distribution feeder level where consumers and their HVAC systems and water heaters on a feeder receive real-time pricing signals.

Widergren, Steven E.; Subbarao, Krishnappa; Chassin, David P.; Fuller, Jason C.; Pratt, Robert G.

2011-10-10T23:59:59.000Z

8

Real-time deformable models for surgery simulation: a survey  

Science Conference Proceedings (OSTI)

Simulating the behaviour of elastic objects in real time is one of the current objectives of computer graphics. One of its fields of application lies in virtual reality, mainly in surgery simulation systems. In computer graphics, the models used for ... Keywords: Animation, Deformable model, Elasticity, Real time, Surgery simulation

U. Meier; O. López; C. Monserrat; M. C. Juan; M. Alcañiz

2005-03-01T23:59:59.000Z

9

Dynamic software updates for real-time systems  

Science Conference Proceedings (OSTI)

Seamlessly updating software in running systems has recently gained momentum. Dynamically updating the software of real-time embedded systems, however, still poses numerous challenges: such systems must meet hard deadlines, cope with limited resources, ... Keywords: dynamic software update, embedded, real-time

Michael Wahler; Stefan Richter; Manuel Oriol

2009-10-01T23:59:59.000Z

10

High-speed real-time multi-rate simulation  

Science Conference Proceedings (OSTI)

Recent research has focused on developing techniques that use digital signal processors (DSPs) and field-programmable gate arrays (FPGAs) to support real-time simulation with frame times of a few microseconds or less. These techniques can be used ... Keywords: FPGA, distributed, high-speed, multi-rate, real-time

Roy Crosbie; Dale Word; John Zenor; Richard Bednar; Wilfred Ghonsalves; Narain Hingorani

2009-07-01T23:59:59.000Z

11

Device Specific Real-time Energy Monitoring, Control, and Dynamic...  

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

Device Specific Real-time Energy Monitoring, Control, and Dynamic Demand Response Solutions Speaker(s): Jake Masters Olcay Ungun Date: February 23, 2010 - 12:00pm Location: 90-3122...

12

REAL-TIME BUILDING ENERGY SIMULATION USING ENERGYPLUS AND THE  

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

REAL-TIME BUILDING ENERGY SIMULATION USING ENERGYPLUS AND THE REAL-TIME BUILDING ENERGY SIMULATION USING ENERGYPLUS AND THE BUILDING CONTROLS VIRTUAL TEST BED Xiufeng Pang 1 , Prajesh Bhattacharya 1 , Zheng O'Neill 2 , Philip Haves 1 , Michael Wetter 1 , and Trevor Bailey 2 1 Lawrence Berkeley National Laboratory, Berkeley, CA, USA 2 United Technologies Research Center, East Hartford, CT, USA ABSTRACT Most commercial buildings do not perform as well in practice as intended by the design and their performances often deteriorate over time. Reasons include faulty construction, malfunctioning equipment, incorrectly configured control systems and inappropriate operating procedures (Haves et al., 2001, Lee et al., 2007). To address this problem, the paper presents a simulation-based whole building performance monitoring tool that allows a

13

Real Time Physically-Based Modeling and Simulation of Cratering and Fragmentation of Terrain  

Science Conference Proceedings (OSTI)

Cratering and fragmentation of terrain due to eXplosions are the behaviors of interest in this effort. We propose a physically-based approach to model the eXplosion event and the process of terrain fragmentation resulting in the formation of craters. ... Keywords: dynamic terrain, eXplosion simulation, physics-based modeling, real time system, simulation, terrain database

Nabil Rami; Michael D. Proctor

2007-12-01T23:59:59.000Z

14

Real-time multiradar simulation with a multiprocessor  

Science Conference Proceedings (OSTI)

Radar coverage of a region for air defense or air traffic control often necessitates the use of multiple radars to compensate for terrain-caused coverage problems and/or guarantee a uniformly good probability of detection over the region. The multi-radar simulator has been built to provide means wherein a real time simulation of a system of netted radars, their radar processors, and collocated trackers can be performed. This simulator is an MIMD machine utilizing the building block processor as the processing element. This implementation has proven easy to program and has brought the necessary computational speed to the problem of emulating effectively a set of radars and their processors observing the same air picture from different vantage points. 5 references.

Hiner, F.P. III

1981-01-01T23:59:59.000Z

15

CERTS 2012 Program Review - Real Time Simulation of Power Grid Operation & Contral - Mani Venkatasubramanian, WSU  

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

Power Grid Simulator Power Grid Simulator Mani V. Venkatasubramanian Dave Anderson, Chuanlin Zhao Carl Hauser, David Bakken Anjan Bose Washington State University Pullman WA 2 GridSim - Real Time Simulation of Power Grid Operation & Control * Funded by USDOE * Project team: Mani Venkatasubramanian (Project Lead), Anjan Bose, Dave Bakken, Carl Hauser, Chuanlin Zhao, Dave Anderson, Alex Ning, Ming Meng, Lin Zhang * Simulate PMU like real-time responses of large- scale power system including power grid dynamics and communication network 3 Project Objectives Improve Reliability and Security of the Electric Power Grid by developing * The new communications and information systems needed to support better automatic controls and operator support tools * The new wide area automatic algorithms needed

16

A Real-Time Simulator for Doubly Fed Induction Generator based Wind Turbine Applications  

E-Print Network (OSTI)

Abstract- This paper describes a real-time simulator of wind turbine generator system suitable for controller design and tests. The simulated generator is a grid-connected doubly fed induction machine with back-to-back PWM voltage source vector control of the rotor. The simulator is based on RT-LAB real-time simulation platform that allows for easy model-to-real-time-target design from Simulink models. The paper puts special emphasis on the fixed-step simulation problematic of kHz-range PWM inverter drives and the techniques used in the real-time simulator to accurately simulate those drives.

Christian Dufour; Jean Bélanger

2004-01-01T23:59:59.000Z

17

Dynamic control in real-time heuristic search  

Science Conference Proceedings (OSTI)

Real-time heuristic search is a challenging type of agent-centered search because the agent's planning time per action is bounded by a constant independent of problem size. A common problem that imposes such restrictions is pathfinding in modern computer ...

Vadim Bulitko; Mitja Luštrek; Jonathan Schaeffer; Yngvi Björnsson; Sverrir Sigmundarson

2008-05-01T23:59:59.000Z

18

Langevin model for real-time Brownian dynamics of interacting nanodefects in irradiated metals  

SciTech Connect

In situ real-time electron microscope observations of metals irradiated with ultrahigh-energy electrons or energetic ions show that the dynamics of microstructural evolution in these materials is strongly influenced by long-range elastic interactions between mobile nanoscale radiation defects. Treating long-range interactions is also necessary for modeling microstructures formed in ex situ high-dose-rate ion-beam irradiation experiments, and for interpolating the ion-beam irradiation data to the low-dose-rate limit characterizing the neutron irradiation environments of fission or fusion power plants. We show that simulations, performed using an algorithm where nanoscale radiation defects are treated as interacting Langevin particles, are able to match and explain the real-time dynamics of nanodefects observed in in situ electron microscope experiments.

Dudarev, S. L. [EURATOM/CCFE Fusion Association, Culham Centre for Fusion Energy, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Gilbert, M. R. [EURATOM/CCFE Fusion Association, Culham Centre for Fusion Energy, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Arakawa, K. [Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411 (Japan); CREST, JST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075 (Japan); Mori, H. [Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Yao, Z. [Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Department of Mechanical and Materials Engineering, Queen's University, Nicol Hall, 60 Union Street, Kingston, Ontario, K7L 3N6 (Canada); Jenkins, M. L. [Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Derlet, P. M. [Condensed Matter Theory Group, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

2010-06-01T23:59:59.000Z

19

Software support tools for high-speed real-time simulations  

Science Conference Proceedings (OSTI)

Frame times as low as 1-2 microseconds are needed for high-speed real-time (HSRT) simulations of power-electronic systems. To achieve such short frame times it is necessary to use special processing platforms and both digital signal processors (DSPs) ... Keywords: electric circuits, real-time simulation, simulation software

J. J. Zenor; R. E. Crosbie; R. Bednar; D. Word; N. G. Hingorani

2009-07-01T23:59:59.000Z

20

Real-time Eulerian water simulation using a restricted tall cell grid  

Science Conference Proceedings (OSTI)

We present a new Eulerian fluid simulation method, which allows real-time simulations of large scale three dimensional liquids. Such scenarios have hitherto been restricted to the domain of off-line computation. To reduce computation time we use a hybrid ... Keywords: fluid simulation, multigrid, real time, tall cell grid

Nuttapong Chentanez; Matthias Müller

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Progress towards a low-cost high-speed real-time multi-rate simulator  

Science Conference Proceedings (OSTI)

Recent research has focused on developing techniques that use field-programmable gate arrays (FPGAs) to support real-time simulation with frame times of a few microseconds or less. These techniques can be used to simulate, for example, modern power electronic ... Keywords: FPGA, distributed, high-speed, multi-rate, real-time

John Zenor; Dale Word; Richard Bednar; Roy Crosbie; Narain Hingorani

2010-07-01T23:59:59.000Z

22

DHARMA: A Tool for Evaluating Dynamic Scheduling Algorithms for Real-time Multiprocessor Systems  

E-Print Network (OSTI)

A majority of today's real-time systems assume a priori knowledge of task characteristics and hence are based on static designs which contribute to their high cost and inflexibility. The next generation hard real-time systems must be designed to be dynamic and flexible. This provides the motivation to study various dynamic scheduling proposals. In this paper, we discuss the design and implementation of a tool, called DHARMA, which is an attempt towards satisfying such requirements. The tool provides an environment to study various dynamic scheduling algorithms with or without fault-tolerance requirements and associated resource reclaiming algorithms in a multiprocessor real-time system.

G. Manimaran; Anand Manikutty; C. Siva Ram Murthy

1998-01-01T23:59:59.000Z

23

Turbulence Sensor Dynamic Calibration Using Real-Time Spectral Computations  

Science Conference Proceedings (OSTI)

The integration of plug-in Fast Fourier Transform (FFT) boards in data acquisition computers allows a considerable development in the dynamic calibration of turbulence sensors. The spectral transfer function of a fast and sensitive turbulence ...

P. G. Mestayer; S. E. Larsen; C. W. Fairall; J. B. Edson

1990-12-01T23:59:59.000Z

24

Enhanced modeling : real-time simulation and modeling of graph based problems on interactive workbenches  

E-Print Network (OSTI)

This thesis presents a methodology and framework for designing systems that apply real-time simulation of computational models throughout the modeling and parameter modification stages of problem solving for graph based ...

Chak, Daniel, 1980-

2004-01-01T23:59:59.000Z

25

Real time quantum dynamics in the Heisenberg picture  

SciTech Connect

In order to understand dynamics in the Heisenberg picture, a study is made of ordinary single particle quantum mechanics where the methods used can be compared with solving the Schroedinger equation numerically. The methods are generalized to field theory. Both analytic and numerical strategies are developed for solving the Heisenberg equations on a time lattice. The time development of an initial gaussian wave function is considered in various potentials in order to study both quantum tunnelling phenomena and the quantum roll. 9 refs., 1 fig. (LEW)

Cooper, F.

1986-01-01T23:59:59.000Z

26

RINSE: The Real-Time Immersive Network Simulation Environment for Network Security Exercises (Extended Version)  

Science Conference Proceedings (OSTI)

The Real-Time Immersive Network Simulation Environment (RINSE) simulator is being developed to support large-scale network security preparedness and training exercises, involving hundreds of players and a modeled network composed of hundreds of local-area ... Keywords: Simulation, emulation, networking, security

Michael Liljenstam; Jason Liu; David M. Nicol; Yougu Yuan; Guanhua Yan; Chris Grier

2006-01-01T23:59:59.000Z

27

Real-time haptic incision simulation using FEM-based discontinuous free form deformation  

Science Conference Proceedings (OSTI)

Computer-aided surgical simulation is a topic of increasingly extensive research. Computer graphics, geometric modeling and finite-element analysis all play major roles in these simulations. Furthermore, real-time response, interactivity and accuracy ... Keywords: finite element model, free-form deformation, surgical simulation

Guy Sela; Jacob Subag; Alex Lindblad; Dan Albocher; Sagi Schein; Gershon Elber

2006-06-01T23:59:59.000Z

28

Real-time Building Energy Simulation using EnergyPlus and the Building  

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

Real-time Building Energy Simulation using EnergyPlus and the Building Real-time Building Energy Simulation using EnergyPlus and the Building Controls Virtual Test Bed Title Real-time Building Energy Simulation using EnergyPlus and the Building Controls Virtual Test Bed Publication Type Conference Proceedings LBNL Report Number LBNL-5390E Year of Publication 2011 Authors Pang, Xiufeng, Prajesh Bhattacharya, Zheng O'Neill, Philip Haves, Michael Wetter, and Trevor Bailey Conference Name Proc. of the 12th IBPSA Conference Pagination p. 2890-2896 Date Published 11/2011 Conference Location Sydney, Australia Abstract Most commercial buildings do not perform as well in practice as intended by the design and their performances often deteriorate over time. Reasons include faulty construction, malfunctioning equipment, incorrectly configured control systems and inappropriate operating procedures (Haves et al., 2001, Lee et al., 2007). To address this problem, the paper presents a simulation-based whole building performance monitoring tool that allows a comparison of building actual performance and expected performance in real time. The tool continuously acquires relevant building model input variables from existing Energy Management and Control System (EMCS). It then reports expected energy consumption as simulated of EnergyPlus. The Building Control Virtual Test Bed (BCVTB) is used as the software platform to provide data linkage between the EMCS, an EnergyPlus model, and a database. This paper describes the integrated real-time simulation environment. A proof-of-concept demonstration is also presented in the paper.

29

Condensate system modelling in real time for a training power plant simulator  

Science Conference Proceedings (OSTI)

In this paper, the basis of the models of the condensate water and the air cooled condenser are presented. The models are part of a full scope simulator of a 450 MW combined cycle power plant. The simulator is executed in real time and is intended to ...

Yadira Mendoza-Alegría; Edgardo J. Roldan-Villasana

2011-10-01T23:59:59.000Z

30

Real-Time Wind Turbine Emulator Suitable for Power Quality and Dynamic Control Studies  

E-Print Network (OSTI)

1 Real-Time Wind Turbine Emulator Suitable for Power Quality and Dynamic Control Studies Dale S. L. Dolan, Student Member, IEEE, P. W. Lehn, Member IEEE Abstract-- Wind turbines are increasingly becoming-time Wind Turbine Emulator, which emulates the dynamic torque produced by an actual turbine has been

Lehn, Peter W.

31

Energy Aware Dynamic Voltage and Frequency Selection for Real-Time Systems with Energy Harvesting  

E-Print Network (OSTI)

Energy Aware Dynamic Voltage and Frequency Selection for Real-Time Systems with Energy Harvesting}@binghamton.edu Abstract In this paper, an energy aware dynamic voltage and frequency selection (EA-DVFS) algorithm energy and the harvested energy in a future duration. Specifically, if the system has sufficient energy

Qiu, Qinru

32

A framework for simulation-based real-time whole building performance  

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

A framework for simulation-based real-time whole building performance A framework for simulation-based real-time whole building performance assessment Title A framework for simulation-based real-time whole building performance assessment Publication Type Journal Article Refereed Designation Unknown LBNL Report Number 0360-1323 Year of Publication 2012 Authors Pang, Xiufeng, Michael Wetter, Prajesh Bhattacharya, and Philip Haves Journal Building and Environment Volume 54 Start Page 100 Pagination 100-108 Date Published 08/2012 ISSN 0360-1323 Keywords building controls virtual test bed, building performance, energy modeling, energyplus, real-time building simulation Abstract Most commercial buildings do not perform as well in practice as intended by the design and their performances often deteriorate over time. Reasons include faulty construction, malfunctioning equipment, incorrectly configured control systems and inappropriate operating procedures. One approach to addressing this problems is to compare the predictions of an energy simulation model of the building to the measured performance and analyze significant differences to infer the presence and location of faults. This paper presents a framework that allows a comparison of building actual performance and expected performance in real time. The realization of the framework utilized the EnergyPlus, the Building Controls Virtual Test Bed (BCVTB) and the Energy Management and Control System (EMCS) was developed. An EnergyPlus model that represents expected performance of a building runs in real time and reports the predicted building performance at each time step. The BCVTB is used as the software platform to acquire relevant inputs from the EMCS through a BACnet interface and send them to the EnergyPlus and to a database for archiving. A proof-of-concept demonstration is also presented.

33

Dynamic Scheduling of Skippable Periodic Tasks with Energy Efficiency in Weakly Hard Real-Time System  

E-Print Network (OSTI)

Energy consumption is a critical design issue in real-time systems, especially in battery- operated systems. Maintaining high performance, while extending the battery life between charges is an interesting challenge for system designers. Dynamic Voltage Scaling (DVS) allows a processor to dynamically change speed and voltage at run time, thereby saving energy by spreading run cycles into idle time. Knowing when to use full power and when not, requires the cooperation of the operating system scheduler. Usually, higher processor voltage and frequency leads to higher system throughput while energy reduction can be obtained using lower voltage and frequency. Instead of lowering processor voltage and frequency as much as possible, energy efficient real-time scheduling adjusts voltage and frequency according to some optimization criteria, such as low energy consumption or high throughput, while it meets the timing constraints of the real-time tasks. As the quantity and functional complexity of battery powered porta...

Baskaran, Santhi

2010-01-01T23:59:59.000Z

34

Real-Time 3D Simulation of a Pressurized Water Nuclear Reactor  

Science Conference Proceedings (OSTI)

Fuel assemblies are very expensive parts of the nuclear reactor. Initially they were used in Hungary for 3 years, now for 4 years and soon they will stay in the core for 5 years. Each year only 1/3rd, 1/4th later 1/5th of them is replaced, therefore ... Keywords: NPP simulation, parallel processing, real-time simulation, coupled thermo-hydraulics and neutron kinetics simulation

Janos Sebestyen Janosy; Andras Kereszturi; Gabor Hazi; Jozsef Pales; Endre Vegh

2010-03-01T23:59:59.000Z

35

Real Time Simulation and Online Control for Virtual Test Drives of Cars  

E-Print Network (OSTI)

Virtual prototyping plays a key role in modern car engineering. For virtual test drives of entire cars in the computer, mathematical and computational models of the vehicle, the road, and the driver are presented. The numerical simulation must be performed in real time for application in Hardware-in-the-Loop experiments. Numerical results are presented for the ISO slalom test.

Cornelius Chucholowski; Martin Vögel; Oskar von Stryk; Thiess-Magnus Wolter

1999-01-01T23:59:59.000Z

36

Enhancing Security of Real-Time Applications on Grids through Dynamic Scheduling  

E-Print Network (OSTI)

advances in processing power, network bandwidth, and storage capacity, Grids are emerging as next [38], and distributed medical data systems [20]. On-line transaction processing systems are examplesEnhancing Security of Real-Time Applications on Grids through Dynamic Scheduling Tao Xie Xiao Qin

Feitelson, Dror

37

An enhanced dynamic voltage scaling scheme for energy-efficient embedded real-time control systems  

Science Conference Proceedings (OSTI)

Real-Time Dynamic Voltage Scaling (RT-DVS) has been one of the most important techniques for energy savings in battery-powered embedded systems. However, pure RT-DVS approaches rarely take into account the actual performance requirements of the target ...

Feng Xia; Youxian Sun

2006-05-01T23:59:59.000Z

38

Real-Time Building Energy Simulation Using EnergyPlus and the Building Controls Test Bed  

SciTech Connect

Most commercial buildings do not perform as well in practice as intended by the design and their performances often deteriorate over time. Reasons include faulty construction, malfunctioning equipment, incorrectly configured control systems and inappropriate operating procedures (Haves et al., 2001, Lee et al., 2007). To address this problem, the paper presents a simulation-based whole building performance monitoring tool that allows a comparison of building actual performance and expected performance in real time. The tool continuously acquires relevant building model input variables from existing Energy Management and Control System (EMCS). It then reports expected energy consumption as simulated of EnergyPlus. The Building Control Virtual Test Bed (BCVTB) is used as the software platform to provide data linkage between the EMCS, an EnergyPlus model, and a database. This paper describes the integrated real-time simulation environment. A proof-of-concept demonstration is also presented in the paper.

Pang, Xiufeng; Bhattachayra, Prajesh; O'Neill, Zheng; Haves, Philip; Wetter, Michael; Bailey, Trevor

2011-11-01T23:59:59.000Z

39

A real-time implementation of gradient domain high dynamic range compression using a local Poisson solver  

Science Conference Proceedings (OSTI)

This paper presents a real-time hardware implementation of a gradient domain dynamic range compression algorithm for high dynamic range (HDR) images. This technique works by calculating the gradients of the HDR image, manipulating those gradients, and ... Keywords: Embedded hardware, Gradient domain dynamic range compression, Poisson equation, Real time, Tone mapping operator

Lavanya Vytla; Firas Hassan; Joan E. Carletta

2013-06-01T23:59:59.000Z

40

Dynamic I/O Power Management for Hard Real-time Systems  

E-Print Network (OSTI)

Power consumption is an important design parameter for embedded and portable systems. Software-controlled (or dynamic) power management (DPM) has recently emerged as an attractive alternative to inflexible hardware solutions. DPM for hard real-time systems has received relatively little attention. In particular, energy-driven I/O device scheduling for real-time systems has not been considered before. We present the first online DPM algorithm, which we call Low Energy Device Scheduler (LEDES), for hard realtime systems. LEDES takes as inputs a predetermined task schedule and a device-usage list for each task and it generates a sequence of sleep/working states for each device. It guarantees that real-time constraints are not violated and it also minimizes the energy consumed by the I/O devices used by the task set. LEDES is energy-optimal under the constraint that the start times of the tasks are fixed. We present a case study to show that LEDES can reduce energy consumption by almost 50%. 1

Vishnu Swaminathan; Krishnendu Chakrabarty; S. S. Iyengar

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Continuous reservoir simulation incorporating uncertainty quantification and real-time data  

E-Print Network (OSTI)

A significant body of work has demonstrated both the promise and difficulty of quantifying uncertainty in reservoir simulation forecasts. It is generally accepted that accurate and complete quantification of uncertainty should lead to better decision making and greater profitability. Many of the techniques presented in past work attempt to quantify uncertainty without sampling the full parameter space, saving on the number of simulation runs, but inherently limiting and biasing the uncertainty quantification in the resulting forecasts. In addition, past work generally has looked at uncertainty in synthetic models and does not address the practical issues of quantifying uncertainty in an actual field. Both of these issues must be addressed in order to rigorously quantify uncertainty in practice. In this study a new approach to reservoir simulation is taken whereby the traditional one-time simulation study is replaced with a new continuous process potentially spanning the life of the reservoir. In this process, reservoir models are generated and run 24 hours a day, seven days a week, allowing many more runs than previously possible and yielding a more thorough exploration of possible reservoir descriptions. In turn, more runs enabled better estimates of uncertainty in resulting forecasts. A new technology to allow this process to run continuously with little human interaction is real-time production and pressure data, which can be automatically integrated into runs. Two tests of this continuous simulation process were conducted. The first test was conducted on the Production with Uncertainty Quantification (PUNQ) synthetic reservoir. Comparison of our results with previous studies shows that the continuous approach gives consistent and reasonable estimates of uncertainty. The second study was conducted in real time on a live field. This study demonstrates the continuous simulation process and shows that it is feasible and practical for real world applications.

Holmes, Jay Cuthbert

2006-12-01T23:59:59.000Z

42

Real-time wind turbine emulator suitable for power quality and dynamic control studies, MASc Thesis  

E-Print Network (OSTI)

Abstract — Wind turbines are increasingly becoming significant components of power systems. To evaluate competing wind energy conversion technologies, a real-time Wind Turbine Emulator, which emulates the dynamic torque produced by an actual turbine has been developed. This is necessary since the real world performance of a wind turbine, subjected to variable wind conditions is more difficult to evaluate than a standard turbine generator system operating in near steady state. This emulator is capable of reproducing both the static and dynamic torque of an actual wind turbine. It models the torque oscillations caused by wind shear, tower shadow, and the obvious pulsations caused by variable wind speed. Also included are the dynamic effects of a large turbine inertia. This emulator will allow testing without the costly construction of the actual turbine blades and tower to determine the strengths and weaknesses of competing energy conversion and control technologies.

Dale S. L. Dolan; Student Member; P. W. Lehn; Member Ieee

2005-01-01T23:59:59.000Z

43

Microsoft PowerPoint - Real-Time Dynamic Brake Assessment poster.ppt [Compatibility Mode]  

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

Dynamic Brake Assessment Dynamic Brake Assessment Purpose Conduct a proof-of-concept test to examine the feasibility of developing an on-board system to assess a vehicle's ability to stop based on typical low-pressure in-service braking events. Partnerships H.T. Hackney Company MGM Brakes Overview Funded through the Federal Motor Carrier Safety Administration's Vehicle and Roadside Operations Division Concept stemming from on the Department of Energy's Medium Truck Duty Cycle research as well as previous research conducted for the National Highway Transportation Safety Administration. Signals to be collected Real-time brake application pressure Vehicle speed and acceleration GPS location and grade information Vehicle weight (current load) Engine parameters such as RPM and torque To be conducted October 2010 -

44

Resolving dynamics of cell signaling via real-time imaging of the immunological synapse.  

SciTech Connect

This highly interdisciplinary team has developed dual-color, total internal reflection microscopy (TIRF-M) methods that enable us to optically detect and track in real time protein migration and clustering at membrane interfaces. By coupling TIRF-M with advanced analysis techniques (image correlation spectroscopy, single particle tracking) we have captured subtle changes in membrane organization that characterize immune responses. We have used this approach to elucidate the initial stages of cell activation in the IgE signaling network of mast cells and the Toll-like receptor (TLR-4) response in macrophages stimulated by bacteria. To help interpret these measurements, we have undertaken a computational modeling effort to connect the protein motion and lipid interactions. This work provides a deeper understanding of the initial stages of cellular response to external agents, including dynamics of interaction of key components in the signaling network at the 'immunological synapse,' the contact region of the cell and its adversary.

Stevens, Mark A.; Pfeiffer, Janet R. (University of New Mexico, Albuquerque, NM); Wilson, Bridget S. (University of New Mexico, Albuquerque, NM); Timlin, Jerilyn Ann; Thomas, James L. (University of New Mexico, Albuquerque, NM); Lidke, Keith A. (University of New Mexico, Albuquerque, NM); Spendier, Kathrin (University of New Mexico, Albuquerque, NM); Oliver, Janet M. (University of New Mexico, Albuquerque, NM); Carroll-Portillo, Amanda (University of New Mexico, Albuquerque, NM); Aaron, Jesse S.; Mirijanian, Dina T.; Carson, Bryan D.; Burns, Alan Richard; Rebeil, Roberto

2009-10-01T23:59:59.000Z

45

Resource Reclaiming in Hard Real-Time Systems with Static and Dynamic Workloads  

E-Print Network (OSTI)

This paper addresses resource reclaiming in the context of non-preemptive priority list scheduling for hard real-time systems. Such scheduling is inherently susceptible to multiprocessor timing anomalies. We present low overhead run-time stabilization methods for a general tasking model that allows phantom tasks as a mechanism to model processor external events. A family of scheduling algorithms is de?ned, that guarantees run-time stabilization for systems consisting of tasks with hard and soft deadlines. The later, i.e. soft tasks, may arrive dynamically. Stabilization is addressed in the context of dynamic and static task to processor allocation. Previous stabilization methods, focused on apriori stabilization for static workloads with dynamic task to processor allocation, thus cannot support this general scheduling model. By taking advantage of run-time information, the stabilization algorithms use the scan-window approach to prevent instability from occurring. Mechanisms are introduced that explicitly control the run-time behavior of tasks with hard deadlines. As a consequence, processor resources become available that can be used to improve processor utilization and response time of soft tasks. The resulting scan algorithms are intended for real world applications where low run-time overhead and a realistic task model are needed. 1

A. W. Krings; M. H. Azadmanesh

1997-01-01T23:59:59.000Z

46

Growth dynamics of pentacene thin films: Real-time synchrotron x-ray scattering study  

Science Conference Proceedings (OSTI)

Real-time synchrotron x-ray scattering in the anti-Bragg configuration was used to monitor the dynamics of pentacene film growth on inert substrates. A distributed-growth model, according to which pentacene molecules adsorbed on the nth layer can either nucleate and contribute to the growth of the (n+1)th layer or transfer downward and contribute to the growth of the nth layer, gave a good description of the data. For molecules adsorbed on the first and second layers, the probability of downward transfer was found to be dependent on the substrate, and independent of temperature within the range from 25 to 60 deg. C. For films grown on SiO{sub 2}, an Ehrlich-Schwoebel barrier of the order of 70 meV dominated downward transfer of pentacene molecules in layers away from the substrate. For films grown on an alkylated self-assembled monolayer, significant desorption of pentacene molecules from the substrate at elevated temperatures forced the growth mode toward the three-dimensional limit.

Mayer, Alex C.; Ruiz, Ricardo; Malliaras, George G. [Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Zhou, Hua; Headrick, Randall L. [Department of Physics, University of Vermont, Burlington, Vermont 05405 (United States); Kazimirov, Alexander [Cornell High Energy Synchrotron Source, Ithaca, New York 14853 (United States)

2006-05-15T23:59:59.000Z

47

PC-Cluster-Based Real-Time Simulation of an 8 synchronous machines network with HVDC link using  

E-Print Network (OSTI)

Abstract—In this paper, we detail the real-time simulation results of a medium-sized network composed of 8 synchronous machines and an HVDC link. The model is composed of two Kundur-like 4 machines networks connected together with a 12pulse HVDC link. The complete network is modeled with SimPowerSystems with ARTEMIS real-time plug-in and is simulated in real-time on a RT-LAB InfiniBand PC-cluster composed of 3 dual-CPU dual-core Opteron PCs. The network model includes the HVDC control and protection systems as well as the synchronous machine regulators and power stabilizers. It also includes typical fault simulation capability like HVDC DC faults, thyristor misfires and AC faults. This model is excellent to study the complex interactions between an HVDC link and AC network under normal and transient conditions. The real-time simulation is controlled and monitored with a TestDrive interface from Opal-RT. This interface, based on LabView, permits easy monitoring and control of the complete system and enables Python-based scripting for automated tests. The proposed simulator can be interfaced with external equipments and controllers by direct reconfiguration of a FPGA I/O card with Xilinx System Generator blockset.

Christian Dufour; Jean-nicolas Paquin; Vincent Lapointe; Jean Bélanger; Loic Schoen

2007-01-01T23:59:59.000Z

48

D. Moreau IEA W60 Burning Plasma Physics and Simulation, Tarragona, July 2005 INTEGRATED REAL-TIME CONTROL  

E-Print Network (OSTI)

D. Moreau IEA W60 Burning Plasma Physics and Simulation, Tarragona, July 2005 INTEGRATED REAL-TIME CONTROL FOR ADVANCED STEADY STATE SCENARIOS AND APPLICATIONS TO BURNING PLASMAS EFDA-JET CSU, Culham. Sartori, and many other JET-EFDA Contributors D. Moreau #12;D. Moreau IEA W60 Burning Plasma Physics

49

Real-time Non-contact Millimeter Wave Characterization of Water-Freezing and Ice-Melting Dynamics  

E-Print Network (OSTI)

We applied millimeter wave radiometry for the first time to monitor water-freezing and ice-melting dynamics in real-time non-contact. The measurements were completed at a frequency of 137 GHz. Small amounts (about 2 mL) ...

Woskov, Paul P.

50

Simulation-based utility assessment of real-time information for sustainable mining operations  

Science Conference Proceedings (OSTI)

In capital intensive industries such as coalmines, real-time information is useful to run their operations within sustainable limits, and to enable early detection and response to deviations from those limits. The goal of this research is to assess the ...

Sai Srinivas Nageshwaraniyer; Chao Meng; Young-Jun Son; Sean Dessureault

2011-12-01T23:59:59.000Z

51

Real-Time Dynamic Visual Tracking Using PSD Sensors and Extended Trapezoidal Motion Planning  

Science Conference Proceedings (OSTI)

A real-time visual servo tracking system for an industrial robot has been implemented using PSD (Position Sensitive Detector) cameras, neural networks, and an extended trapezoidal motion planning method. PSD and directly transduces the light‘s ... Keywords: extended trapezoidal motion planning, locally activated neural network, position sensitive detectors, target tracking, visual servoing

Soo-Hyuk Nam; Se-Young Oh

1999-01-01T23:59:59.000Z

52

STEMS-RT 1.0: Short-Term Electricity Market Simulator (Real Time), Demonstration Version 1.0  

Science Conference Proceedings (OSTI)

The Short-Term Electricity Market Simulator (Real Time) Demonstration Version 1.0 (STEMS-RT 1.0) allows the user to simulate simple examples of electricity markets. Description: The STEMS-RT 1.0 software is based on EPRI's pioneering development and application of agent-based simulation for the study of decision-making associated with electricity markets. In fact, the Nobel Prize in Economics was recently awarded to earlier pioneers of such investigations using people and otherwise known as experimental ...

2004-12-20T23:59:59.000Z

53

PhotoVoltaic distributed generation for Lanai power grid real-time simulation and control integration scenario.  

Science Conference Proceedings (OSTI)

This paper discusses the modeling, analysis, and testing in a real-time simulation environment of the Lanai power grid system for the integration and control of PhotoVoltaic (PV) distributed generation. The Lanai Island in Hawaii is part of the Hawaii Clean Energy Initiative (HCEI) to transition to 30% renewable green energy penetration by 2030. In Lanai the primary loads come from two Castle and Cook Resorts, in addition to residential needs. The total peak load profile is 12470 V, 5.5 MW. Currently there are several diesel generators that meet these loading requirements. As part of the HCEI, Lanai has initially installed 1.2 MW of PV generation. The goal of this study has been to evaluate the impact of the PV with respect to the conventional carbon-based diesel generation in real time simulation. For intermittent PV distributed generation, the overall stability and transient responses are investigated. A simple Lanai 'like' model has been developed in the Matlab/Simulink environment (see Fig. 1) and to accommodate real-time simulation of the hybrid power grid system the Opal-RT Technologies RT-Lab environment is used. The diesel generators have been modelled using the SimPowerSystems toolbox swing equations and a custom Simulink module has been developed for the High level PV generation. All of the loads have been characterized primarily as distribution lines with series resistive load banks with one VAR load bank. Three-phase faults are implemented for each bus. Both conventional and advanced control architectures will be used to evaluate the integration of the PV onto the current power grid system. The baseline numerical results include the stable performance of the power grid during varying cloud cover (PV generation ramping up/down) scenarios. The importance of assessing the real-time scenario is included.

Robinett, Rush D., III; Kukolich, Keith (Opal RT Technologies, Montreal, Quebec, Canada); Wilson, David Gerald; Schenkman, Benjamin L.

2010-06-01T23:59:59.000Z

54

Testing of an Emitter Turn-Off-Based Static Synchronous Compensator (STATCOM) Controller with Real-Time Digital Simulation  

Science Conference Proceedings (OSTI)

In this report, the testing of a controller for a 10-MVAR emitter turn-off (ETO) static VAR compensator (STATCOM) through hardware-in-the-loop simulation is described. As the STATCOM was initially intended to be placed near a 50-MW wind farm within the Bonneville Power Administration (BPA) system, the wind farm, STATCOM, and relevant portions of the utility system were modeled for a real-time simulator at the Center for Advanced Power Systems (CAPS) at Florida State University. Data for validation of the...

2010-01-20T23:59:59.000Z

55

Reliability-aware dynamic energy management in dependable embedded real-time systems  

E-Print Network (OSTI)

Recent studies show that, voltage scaling, which is an efficient energy management technique, has a direct and negative effect on system reliability because of the increased rate of transient faults (e.g., those induced by cosmic particles). In this work, we propose energy management schemes that explicitly take system reliability into consideration. The proposed reliability-aware energy management schemes dynamically schedule recoveries for tasks to be scaled down to recuperate the reliability loss due to energy management. Based on the amount of available slack, the application size and the fault rate changes, we analyze when it is profitable to reclaim the slack for energy savings without sacrificing system reliability. Checkpoint technique is further explored to efficiently use the slack. Analytical and simulation results show that, the proposed schemes can achieve comparable energy savings as ordinary energy management schemes while preserving system reliability. The ordinary energy management schemes that ignore the effects of voltage scaling on fault rate changes could lead to drastically decreased system reliability.

Dakai Zhu

2006-01-01T23:59:59.000Z

56

RINSE: The Real-Time Immersive Network Simulation Environment for Network Security Exercises  

Science Conference Proceedings (OSTI)

The RINSE simulator is being developed to support large-scale network security preparedness and training exercises, involving hundreds of players and a modeled network composed of hundreds of LANs. The simulator must be able to present a realistic rendering ...

Michael Liljenstam; Jason Liu; David Nicol; Yougu Yuan; Guanhua Yan; Chris Grier

2005-06-01T23:59:59.000Z

57

Real-Time Building Energy Simulation Using EnergyPlus and the Building Controls Test Bed  

E-Print Network (OSTI)

Energy and Buildings, 33: 319-331. Haves, P. , Salsbury,using simulation. Energy and Buildings, 32:5-17. US DOE.a new-generation building energy simulation program.

Pang, Xiufeng

2013-01-01T23:59:59.000Z

58

Power-aware scheduling and dynamic voltage setting for tasks running on a hard real-time system  

E-Print Network (OSTI)

Abstract- This paper addresses the problem of minimizing energy consumption of a computer system performing periodic hard real-time tasks with precedence constraints. In the proposed approach, dynamic power management and voltage scaling techniques are combined to reduce the energy consumption of the CPU and devices. The optimization problem is first formulated as an integer programming problem. Next, a three-phase solution framework, which integrates power management scheduling and task voltage assignment, is proposed. Experimental results show that the proposed approach outperforms existing methods by an average of 18 % in terms of the system-wide energy savings. I.

Peng Rong

2006-01-01T23:59:59.000Z

59

Real-Time Building Energy Simulation Using EnergyPlus and the Building Controls Test Bed  

E-Print Network (OSTI)

creating a new-generation building energy simulationprogram. Energy and Buildings, 33: 319-331. Haves, P. ,Liu M. 2001. Use of Whole Building Simulation in On- Line

Pang, Xiufeng

2013-01-01T23:59:59.000Z

60

Real-Time Building Energy Simulation Using EnergyPlus and the Building Controls Test Bed  

E-Print Network (OSTI)

simulation, e.g. solar radiation, wind speed and directionand direct normal and diffuse solar radiation. For real-timedirection, direct normal solar radiation and diffuse solar

Pang, Xiufeng

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

A framework for simulation-based real-time whole building performance assessment  

E-Print Network (OSTI)

DB. Simulation of Energy Management Systems in EnergyPlus.the same way as Energy Management System (EMS) actuators andin Building Energy Management Systems. Energy and Building

Pang, Xiufeng

2013-01-01T23:59:59.000Z

62

Development of an FPGA-based system for real-time simulation of photovoltaic modules  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) simulators are indispensable for the operational evaluation of PV energy production system components (e.g. battery chargers, DC/AC inverters, etc.), in order to avoid the time-consuming and expensive field-testing process. In this ... Keywords: DC/DC converter, Field programmable gate array, Photovoltaic system, Rapid system prototyping, Simulator

Eftichios Koutroulis; Kostas Kalaitzakis; Vasileios Tzitzilonis

2009-07-01T23:59:59.000Z

63

A Real-time Interface Simulator for Operator Training: A Proposed Architecture  

Science Conference Proceedings (OSTI)

Operator training systems are essential tools for industrial systems, particularly for those where human error has an impact on the safety of materials and personnel and/or may cause significant financial losses. The work presented here is part of a ... Keywords: Operator Training Simulator, Petri nets, human interfaces, industrial automation, simulation engine architecture, virtual reality

Maria F. Q. Vieira; José A. N. Neto; Alexandre Scaico; Charles Santoni; Jean-Marc Mercantini

2010-01-01T23:59:59.000Z

64

Quasi-real-time analysis of dynamic near field scattering data using a graphics processing unit  

E-Print Network (OSTI)

We present an implementation of the analysis of dynamic near field scattering (NFS) data using a graphics processing unit (GPU). We introduce an optimized data management scheme thereby limiting the number of operations required. Overall, we reduce the processing time from hours to minutes, for typical experimental conditions. Previously the limiting step in such experiments, the processing time is now comparable to the data acquisition time. Our approach is applicable to various dynamic NFS methods, including shadowgraph, Schlieren and differential dynamic microscopy.

Giovanni Cerchiari; Fabrizio Croccolo; Frédéric Cardinaux; Frank Scheffold

2012-09-15T23:59:59.000Z

65

Development of an FPGA-based System for Real-Time Simulation of  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) simulators are indispensable for the laboratory operational evaluation of PV energy production system components (e.g. battery chargers, DC/AC inverters etc.), in order to avoid the time-consuming and expensive field-testing process. ...

Eftichios Koutroulis; Kostas Kalaitzakis; Vasileios Tzitzilonis

2006-06-01T23:59:59.000Z

66

A dynamic time warping approach to real-time activity recognition for food preparation  

Science Conference Proceedings (OSTI)

We present a dynamic time warping based activity recognition system for the analysis of low-level food preparation activities. Accelerometers embedded into kitchen utensils provide continuous sensor data streams while people are using them for cooking. ...

Cuong Pham; Thomas Plötz; Patrick Olivier

2010-11-01T23:59:59.000Z

67

Real Time Dynamics of Laser Activated Interface Processes at the Molecular Scale  

SciTech Connect

Nanotechnology is one of the most interesting and challenging frontiers of science and technology. We are motivated by the belief that progress will come from improved understanding and control of structure, dynamics and reactivity at interfaces. First, we provide a summary of our projects and key findings. The following pages provide a more detailed account.

Eric Borguet

2007-12-30T23:59:59.000Z

68

Energy aware dynamic voltage and frequency selection for real-time systems with energy harvesting  

Science Conference Proceedings (OSTI)

In this paper, an energy aware dynamic voltage and frequency selection (EA-DVFS) algorithm is proposed. The EA-DVFS algorithm adjusts the processor's behavior depending on the summation of the stored energy and the harvested energy in a future duration. ...

Shaobo Liu; Qinru Qiu; Qing Wu

2008-03-01T23:59:59.000Z

69

Real-time motion effect enhancement based on fluid dynamics in figure animation  

Science Conference Proceedings (OSTI)

In fast figure animation, motion blur is often employed to generate fantastic effects of figure motion, for exaggerating the atmosphere one wants to convey. In the previous works for long time, the solution based on certain kind of image blending in ... Keywords: GPU geometric processing, fluid dynamics, motion blur, skeletal animation

Tian-Chen Xu; En-Hua Wu; Mo Chen; Ming Xie

2011-12-01T23:59:59.000Z

70

The Star, A Dynamically Configured Dataflow Director for Real Time Control  

SciTech Connect

The CEBAF accelerator is controlled by an automated system consisting of 50 computers connected to machine hardware and another 20 to 30 computers used for displaying machine data. The control system communication software must manage the inter-machine communication of those computers. Each of the different segments of software that make up the machine control system is treated as data sources and data sinks, with a single process mediating the transfer of all data between any data source/data sink pair. The mediating process is called the Star. This dynamically configured process keeps track of all available machine data posted by data sources and of all data requested by data sinks. Data transmission rates through the Star are kept low by sending only data that is requested by other control software, and then only when the value of the data changes. The system is entirely response-driven, with the Star process taking action only at the request of either a data source or a sink. The software for the communication is written using standard C code and TCP/IP sockets, making the communication platform independent.

Matt Bickley; J. Kewisch

1993-05-01T23:59:59.000Z

71

First Demonstration of Combined kV/MV Image-Guided Real-Time Dynamic Multileaf-Collimator Target Tracking  

SciTech Connect

Purpose: For intrafraction motion management, a real-time tracking system was developed by combining fiducial marker-based tracking via simultaneous kilovoltage (kV) and megavoltage (MV) imaging and a dynamic multileaf collimator (DMLC) beam-tracking system. Methods and Materials: The integrated tracking system employed a Varian Trilogy system equipped with kV/MV imaging systems and a Millennium 120-leaf MLC. A gold marker in elliptical motion (2-cm superior-inferior, 1-cm left-right, 10 cycles/min) was simultaneously imaged by the kV and MV imagers at 6.7 Hz and segmented in real time. With these two-dimensional projections, the tracking software triangulated the three-dimensional marker position and repositioned the MLC leaves to follow the motion. Phantom studies were performed to evaluate time delay from image acquisition to MLC adjustment, tracking error, and dosimetric impact of target motion with and without tracking. Results: The time delay of the integrated tracking system was {approx}450 ms. The tracking error using a prediction algorithm was 0.9 {+-} 0.5 mm for the elliptical motion. The dose distribution with tracking showed better target coverage and less dose to surrounding region over no tracking. The failure rate of the gamma test (3%/3-mm criteria) was 22.5% without tracking but was reduced to 0.2% with tracking. Conclusion: For the first time, a complete tracking system combining kV/MV image-guided target tracking and DMLC beam tracking was demonstrated. The average geometric error was less than 1 mm, and the dosimetric error was negligible. This system is a promising method for intrafraction motion management.

Cho, Byungchul [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)], E-mail: bccho@stanford.edu; Poulsen, Per R. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Department of Medical Physics, Department of Oncology, Aarhus University, Aarhus (Denmark); Sloutsky, Alex [Varian Medical Systems, Palo Alto, CA (United States); Sawant, Amit; Keall, Paul J. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)

2009-07-01T23:59:59.000Z

72

A time-cognizant dynamic crash recovery scheme suitable for distributed real-time main memory databases  

Science Conference Proceedings (OSTI)

Rapid and efficient recovery in the event of site crash is very important for distributed real-time main memory database system. In this paper, the recovery correctness criteria of distributed real-time main memory databases are first given. Then, a ...

Yingyuan Xiao; Yunsheng Liu; Xiangyang Chen; Xiaofeng Liu

2006-09-01T23:59:59.000Z

73

Real-time embedded systems powered by FPGA dynamic partial self-reconfiguration: a case study oriented to biometric recognition applications  

Science Conference Proceedings (OSTI)

This work aims to pave the way for an efficient open system architecture applied to embedded electronic applications to manage the processing of computationally complex algorithms at real-time and low-cost. The target is to define a standard architecture ... Keywords: Automatic fingerprint authentication system, Dynamic partial self-reconfiguration, FPGA, Reconfiguration controller, Run-time reconfigurable computing

Francisco Fons, Mariano Fons, Enrique Cantó, Mariano López

2013-09-01T23:59:59.000Z

74

The dosimetric impact of inversely optimized arc radiotherapy plan modulation for real-time dynamic MLC tracking delivery  

SciTech Connect

Purpose: Real-time dynamic multileaf collimator (MLC) tracking for management of intrafraction tumor motion can be challenging for highly modulated beams, as the leaves need to travel far to adjust for target motion perpendicular to the leaf travel direction. The plan modulation can be reduced by using a leaf position constraint (LPC) that reduces the difference in the position of adjacent MLC leaves in the plan. The purpose of this study was to investigate the impact of the LPC on the quality of inversely optimized arc radiotherapy plans and the effect of the MLC motion pattern on the dosimetric accuracy of MLC tracking delivery. Specifically, the possibility of predicting the accuracy of MLC tracking delivery based on the plan modulation was investigated. Methods: Inversely optimized arc radiotherapy plans were created on CT-data of three lung cancer patients. For each case, five plans with a single 358 deg. arc were generated with LPC priorities of 0 (no LPC), 0.25, 0.5, 0.75, and 1 (highest possible LPC), respectively. All the plans had a prescribed dose of 2 Gy x 30, used 6 MV, a maximum dose rate of 600 MU/min and a collimator angle of 45 deg. or 315 deg. To quantify the plan modulation, an average adjacent leaf distance (ALD) was calculated by averaging the mean adjacent leaf distance for each control point. The linear relationship between the plan quality [i.e., the calculated dose distributions and the number of monitor units (MU)] and the LPC was investigated, and the linear regression coefficient as well as a two tailed confidence level of 95% was used in the evaluation. The effect of the plan modulation on the performance of MLC tracking was tested by delivering the plans to a cylindrical diode array phantom moving with sinusoidal motion in the superior-inferior direction with a peak-to-peak displacement of 2 cm and a cycle time of 6 s. The delivery was adjusted to the target motion using MLC tracking, guided in real-time by an infrared optical system. The dosimetric results were evaluated using gamma index evaluation with static target measurements as reference. Results: The plan quality parameters did not depend significantly on the LPC (p {>=} 0.066), whereas the ALD depended significantly on the LPC (p < 0.001). The gamma index failure rate depended significantly on the ALD, weighted to the percentage of the beam delivered in each control point of the plan (ALD{sub w}) when MLC tracking was used (p < 0.001), but not for delivery without MLC tracking (p {>=} 0.342). The gamma index failure rate with the criteria of 2% and 2 mm was decreased from > 33.9% without MLC tracking to <31.4% (LPC 0) and <2.2% (LPC 1) with MLC tracking. Conclusions: The results indicate that the dosimetric robustness of MLC tracking delivery of an inversely optimized arc radiotherapy plan can be improved by incorporating leaf position constraints in the objective function without otherwise affecting the plan quality. The dosimetric robustness may be estimated prior to delivery by evaluating the ALD{sub w} of the plan.

Falk, Marianne; Larsson, Tobias; Keall, Paul; Chul Cho, Byung; Aznar, Marianne; Korreman, Stine; Poulsen, Per; Munck af Rosenschoeld, Per [Radiation Medicine Research Center, Department of Radiation Oncology - 3994, Rigshospitalet, Blegdamsvej 9, DK - 2100 Copenhagen (Denmark) and Niels Bohr Institute, University of Copenhagen (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark); Radiation Physics Laboratory, Sydney Medical School, University of Sydney (Australia); Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul (Korea, Republic of); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital, Denmark and Niels Bohr Institute, University of Copenhagen (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark); Niels Bohr Institute, University of Copenhagen (Denmark) and Department of Science, Systems and Models, Roskilde University (Denmark); Department of Oncology, Aarhus University Hospital (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark) and Niels Bohr Institute, University of Copenhagen (Denmark)

2012-03-15T23:59:59.000Z

75

Real-time shading  

Science Conference Proceedings (OSTI)

Real-time procedural shading was once seen as a distant dream. When the first version of this course was offered four years ago, real-time shading was possible, but only with one-of-a-kind hardware or by combining the effects of tens to hundreds of rendering ...

Marc Olano; Kurt Akeley; John C. Hart; Wolfgang Heidrich; Michael McCool; Jason L. Mitchell; Randi Rost

2004-08-01T23:59:59.000Z

76

Toward real-time modeling of human heart ventricles at cellular resolution: simulation of drug-induced arrhythmias  

Science Conference Proceedings (OSTI)

We have developed a highly efficient and scalable cardiac electrophysiology simulation capability that supports groundbreaking resolution and detail to elucidate the mechanisms of sudden cardiac death from arrhythmia. We can simulate thousands of heartbeats ...

Arthur A. Mirin; David F. Richards; James N. Glosli; Erik W. Draeger; Bor Chan; Jean-luc Fattebert; William D. Krauss; Tomas Oppelstrup; John Jeremy Rice; John A. Gunnels; Viatcheslav Gurev; Changhoan Kim; John Magerlein; Matthias Reumann; Hui-Fang Wen

2012-11-01T23:59:59.000Z

77

A Real-Time, Interactive Simulation Environment for Unmanned Ground Vehicles: The Autonomous Navigation Virtual Environment Laboratory (ANVEL)  

Science Conference Proceedings (OSTI)

Modeling and simulation tools have become an integral part of modern engineering processes. In particular, accurate and efficient simulation tools are critical for the design, development, and testing of autonomous unmanned ground vehicles (UGVs). However, ... Keywords: unmanned ground vehicles, computer games and simulation, physics-based modeling, intelligent systems, military applications

Phillip J. Durst; Christopher Goodin; Chris Cummins; Burhman Gates; Burney Mckinley; Taylor George; Mitchell M. Rohde; Matthew A. Toschlog; Justin Crawford

2012-07-01T23:59:59.000Z

78

Real-Time Target Position Estimation Using Stereoscopic Kilovoltage/Megavoltage Imaging and External Respiratory Monitoring for Dynamic Multileaf Collimator Tracking  

SciTech Connect

Purpose: To develop a real-time target position estimation method using stereoscopic kilovoltage (kV)/megavoltage (MV) imaging and external respiratory monitoring, and to investigate the performance of a dynamic multileaf collimator tracking system using this method. Methods and Materials: The real-time three-dimensional internal target position estimation was established by creating a time-varying correlation model that connected the external respiratory signals with the internal target motion measured intermittently using kV/MV imaging. The method was integrated into a dynamic multileaf collimator tracking system. Tracking experiments were performed for 10 thoracic/abdominal traces. A three-dimensional motion platform carrying a gold marker and a separate one-dimensional motion platform were used to reproduce the target and external respiratory motion, respectively. The target positions were detected by kV (1 Hz) and MV (5.2 Hz) imaging, and external respiratory motion was captured by an optical system (30 Hz). The beam-target alignment error was quantified as the positional difference between the target and circular beam center on the MV images acquired during tracking. The correlation model error was quantified by comparing a model estimate and measured target positions. Results: The root-mean-square errors in the beam-target alignment that had ranged from 3.1 to 7.6 mm without tracking were reduced to <1.5 mm with tracking, except during the model building period (6 s). The root-mean-square error in the correlation model was submillimeters in all directions. Conclusion: A novel real-time target position estimation method was developed and integrated into a dynamic multileaf collimator tracking system and demonstrated an average submillimeter geometric accuracy after initializing the internal/external correlation model. The method used hardware tools available on linear accelerators and therefore shows promise for clinical implementation.

Cho, Byungchul, E-mail: bcho@amc.seoul.k [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Poulsen, Per Rugaard [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Department of Medical Physics, Department of Radiation Oncology, Aarhus University, Aarhus (Denmark); Sawant, Amit; Ruan, Dan; Keall, Paul J. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)

2011-01-01T23:59:59.000Z

79

Real Time Simulation and Visualization of NC Milling Processes for Inhomogeneous Materials on Low-End Graphics Hardware  

E-Print Network (OSTI)

Simulation and visualization of NC milling processes has become an important step in computer aided manufacturing. The usage of stock materials with specific locally varying properties (like density, accuracy, color,. . . ) becomes more and more important with new technologies emerging in the material industry. Our new approach, using volumetric representation, has been adapted to this needs and copes with inhomogeneous material properties. Taking color as one possible material property, our approach enables the visualization of milled wood or compound materials. Furthermore, our approach has been developed with the usage of low-end graphics hardware in mind. The algorithms have been optimized to ensure interactive update rates even on standard personal computers without hardware graphics acceleration. Keywords: NC milling simulation, dexel approach, inhomogeneous material properties 1. Introduction NC milling simulation using computer graphics techniques was proposed some years ag...

Andreas Holger König; Eduard Gröller

1998-01-01T23:59:59.000Z

80

An Operational Dynamical Downscaling Prediction System for Nordeste Brazil and the 2002–04 Real-Time Forecast Evaluation  

Science Conference Proceedings (OSTI)

The International Research Institute for Climate Prediction (IRI) and Ceará Foundation for Meteorology and Water Resources (FUNCEME) in Brazil have developed a dynamical downscaling prediction system for Northeast Brazil (the Nordeste) and have ...

Liqiang Sun; Huilan Li; Stephen E. Zebiak; David F. Moncunill; Francisco D. A. D. S. Filho; Antonio D. Moura

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Resource Reclaiming in Multiprocessor Real-Time Systems  

E-Print Network (OSTI)

Most real-time scheduling algorithms schedule tasks with respect to their worst case computation times. Resource reclaiming refers to the problem of utilizing the resources left unused by a task when it executes less than its worst case computation time, or when a task is deleted from the current schedule. Resource reclaiming is a very important issue in dynamic real-time multiprocessor environments. In this paper, we present dynamic resource reclaiming algorithms that are effective, avoids any run time anomalies, and have bounded overhead cost that is independent of the number of tasks in the schedule. Each Task is assumed to have a worst case computation time, a deadline, and a set of resource requirements. The algorithms utilize the information given in a multiprocessor task schedule and perform on-line local optimization. The effectiveness of the algorithms is demonstrated through simulation studies. The algorithms have also been implemented in the Spring Kernel [15].

Chia Shen; Krithi Ramamritham; John A. Stankovic

1992-01-01T23:59:59.000Z

82

REAL TIME SYSTEM OPERATIONS 2006-2007  

Science Conference Proceedings (OSTI)

The Real Time System Operations (RTSO) 2006-2007 project focused on two parallel technical tasks: (1) Real-Time Applications of Phasors for Monitoring, Alarming and Control; and (2) Real-Time Voltage Security Assessment (RTVSA) Prototype Tool. The overall goal of the phasor applications project was to accelerate adoption and foster greater use of new, more accurate, time-synchronized phasor measurements by conducting research and prototyping applications on California ISO's phasor platform - Real-Time Dynamics Monitoring System (RTDMS) -- that provide previously unavailable information on the dynamic stability of the grid. Feasibility assessment studies were conducted on potential application of this technology for small-signal stability monitoring, validating/improving existing stability nomograms, conducting frequency response analysis, and obtaining real-time sensitivity information on key metrics to assess grid stress. Based on study findings, prototype applications for real-time visualization and alarming, small-signal stability monitoring, measurement based sensitivity analysis and frequency response assessment were developed, factory- and field-tested at the California ISO and at BPA. The goal of the RTVSA project was to provide California ISO with a prototype voltage security assessment tool that runs in real time within California ISO?s new reliability and congestion management system. CERTS conducted a technical assessment of appropriate algorithms, developed a prototype incorporating state-of-art algorithms (such as the continuation power flow, direct method, boundary orbiting method, and hyperplanes) into a framework most suitable for an operations environment. Based on study findings, a functional specification was prepared, which the California ISO has since used to procure a production-quality tool that is now a part of a suite of advanced computational tools that is used by California ISO for reliability and congestion management.

Eto, Joseph H.; Parashar, Manu; Lewis, Nancy Jo

2008-08-15T23:59:59.000Z

83

RECOVERY ACT: DYNAMIC ENERGY CONSUMPTION MANAGEMENT OF ROUTING TELECOM AND DATA CENTERS THROUGH REAL-TIME OPTIMAL CONTROL (RTOC): Final Scientific/Technical Report  

Science Conference Proceedings (OSTI)

This final scientific report documents the Industrial Technology Program (ITP) Stage 2 Concept Development effort on Data Center Energy Reduction and Management Through Real-Time Optimal Control (RTOC). Society is becoming increasingly dependent on information technology systems, driving exponential growth in demand for data center processing and an insatiable appetite for energy. David Raths noted, 'A 50,000-square-foot data center uses approximately 4 megawatts of power, or the equivalent of 57 barrels of oil a day1.' The problem has become so severe that in some cases, users are giving up raw performance for a better balance between performance and energy efficiency. Historically, power systems for data centers were crudely sized to meet maximum demand. Since many servers operate at 60%-90% of maximum power while only utilizing an average of 5% to 15% of their capability, there are huge inefficiencies in the consumption and delivery of power in these data centers. The goal of the 'Recovery Act: Decreasing Data Center Energy Use through Network and Infrastructure Control' is to develop a state of the art approach for autonomously and intelligently reducing and managing data center power through real-time optimal control. Advances in microelectronics and software are enabling the opportunity to realize significant data center power savings through the implementation of autonomous power management control algorithms. The first step to realizing these savings was addressed in this study through the successful creation of a flexible and scalable mathematical model (equation) for data center behavior and the formulation of an acceptable low technical risk market introduction strategy leveraging commercial hardware and software familiar to the data center market. Follow-on Stage 3 Concept Development efforts include predictive modeling and simulation of algorithm performance, prototype demonstrations with representative data center equipment to verify requisite performance and continued commercial partnering agreement formation to ensure uninterrupted development, and deployment of the real-time optimal control algorithm. As a software implementable technique for reducing power consumption, the RTOC has two very desirable traits supporting rapid prototyping and ultimately widespread dissemination. First, very little capital is required for implementation. No major infrastructure modifications are required and there is no need to purchase expensive capital equipment. Second, the RTOC can be rolled out incrementally. Therefore, the effectiveness can be proven without a large scale initial roll out. Through the use of the Impact Projections Model provided by the DOE, monetary savings in excess of $100M in 2020 and billions by 2040 are predicted. In terms of energy savings, the model predicts a primary energy displacement of 260 trillion BTUs (33 trillion kWh), or a 50% reduction in server power consumption. The model also predicts a corresponding reduction of pollutants such as SO2 and NOx in excess of 100,000 metric tonnes assuming the RTOC is fully deployed. While additional development and prototyping is required to validate these predictions, the relative low cost and ease of implementation compared to large capital projects makes it an ideal candidate for further investigation.

Ron Moon

2011-06-30T23:59:59.000Z

84

Adaptive Real-Time Methodology for Optimizing Energy-Efficient...  

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

Email Adaptive Real-Time Methodology for Optimizing Energy-Efficient Computing Dynamic voltage and frequency scaling (DVFS) is an effective way to reduce energy and power...

85

Electromagnetic Real-Time Tumor Position Monitoring and Dynamic Multileaf Collimator Tracking Using a Siemens 160 MLC: Geometric and Dosimetric Accuracy of an Integrated System  

SciTech Connect

Purpose: Dynamic multileaf collimator tracking represents a promising method for high-precision radiotherapy to moving tumors. In the present study, we report on the integration of electromagnetic real-time tumor position monitoring into a multileaf collimator-based tracking system. Methods and Materials: The integrated system was characterized in terms of its geometric and radiologic accuracy. The former was assessed from portal images acquired during radiation delivery to a phantom in tracking mode. The tracking errors were calculated from the positions of the tracking field and of the phantom as extracted from the portal images. Radiologic accuracy was evaluated from film dosimetry performed for conformal and intensity-modulated radiotherapy applied to different phantoms moving on sinusoidal trajectories. A static radiation delivery to the nonmoving target served as a reference for the delivery to the moving phantom with and without tracking applied. Results: Submillimeter tracking accuracy was observed for two-dimensional target motion despite the relatively large system latency of 500 ms. Film dosimetry yielded almost complete recovery of a circular dose distribution with tracking in two dimensions applied: 2%/2 mm gamma-failure rates could be reduced from 59.7% to 3.3%. For single-beam intensity-modulated radiotherapy delivery, accuracy was limited by the finite leaf width. A 2%/2 mm gamma-failure rate of 15.6% remained with tracking applied. Conclusion: The integrated system we have presented marks a major step toward the clinical implementation of high-precision dynamic multileaf collimator tracking. However, several challenges such as irregular motion traces or a thorough quality assurance still need to be addressed.

Krauss, Andreas, E-mail: andreas.krauss@dkfz-heidelberg.d [Department of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg (Germany); Nill, Simeon; Tacke, Martin; Oelfke, Uwe [Department of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg (Germany)

2011-02-01T23:59:59.000Z

86

A real time priority scheduler  

Science Conference Proceedings (OSTI)

The real time priority scheduler reported herein evolved from a design effort to provide software aids for handling the interrupts that occur in hybrid computation. Since these interrupts are both internal and external (i.e., generated internal and external ...

Karl Ramsay; Jon C. Strauss

1966-01-01T23:59:59.000Z

87

A Framework of Concurrent Task Scheduling and Dynamic Voltage and Frequency Scaling in Real-Time Embedded Systems with Energy Harvesting  

E-Print Network (OSTI)

harvesting module is comprised of a Photovoltaic (PV) panel for harvesting energy and a supercapacitor panel, state-of- charge management for the supercapacitor, and energy-harvesting- aware real-time task-leakage of the supercapacitor, and power losses in voltage converters, employs a cascaded feedback control structure

Pedram, Massoud

88

Real-Time Airborne Particle Analyzer  

Geology, biology, and environmental science HAZMAT Weapons inspection : Real-time method for measuring elemental composition

89

Real time infrared aerosol analyzer  

DOE Patents (OSTI)

Apparatus for analyzing aerosols in essentially real time includes a virtual impactor which separates coarse particles from fine and ultrafine particles in an aerosol sample. The coarse and ultrafine particles are captured in PTFE filters, and the fine particles impact onto an internal light reflection element. The composition and quantity of the particles on the PTFE filter and on the internal reflection element are measured by alternately passing infrared light through the filter and the internal light reflection element, and analyzing the light through infrared spectrophotometry to identify the particles in the sample.

Johnson, Stanley A. (Countryside, IL); Reedy, Gerald T. (Bourbonnais, IL); Kumar, Romesh (Naperville, IL)

1990-01-01T23:59:59.000Z

90

Dynamic simulation model for non-supplementary firing triple-pressure heat recovery steam generator  

Science Conference Proceedings (OSTI)

By using the modular modeling method, a real-time dynamic simulation model for the non-supplementary tri-pressure reheat Heat Recovery Steam Generator (HRSG) is developed. On the basis of mass and energy conservation law, the paper discusses the model ... Keywords: HRSG, dynamic model, modular modelling, simulation

Ning Cui; Bing-Shu Wang; Xiang-Yang Gong; Jian-Qiang Gao

2007-10-01T23:59:59.000Z

91

On the stability of wholesale electricity markets under real-time pricing  

E-Print Network (OSTI)

The paper proposes a mathematical model for the dynamic evolution of supply, demand, and clearing prices under a class of real-time pricing mechanisms characterized by passing on the real-time wholesale prices to the end ...

Roozbehani, Mardavij

92

Predictable real-time software synthesis  

Science Conference Proceedings (OSTI)

Formal theories for real-time systems (such as timed process algebra, timed automata and timed petri nets) have gained great success in the modeling of concurrent timing behavior and in the analysis of real-time properties. However, due to the ineliminable ... Keywords: Formal methods, Program synthesis, Real-time systems

Jinfeng Huang; Jeroen Voeten; Henk Corporaal

2007-08-01T23:59:59.000Z

93

Non-solvolytic synthesis of aqueous soluble TiO2 nanoparticles and real-time dynamic measurements of the nanoparticle formation  

E-Print Network (OSTI)

of dried bare Dpa- and GalA-TiO2 NPs. Chen et al. Nanoscale Research Letters 2012, 7:297 Page 6 of 10 http://www.nanoscalereslett.com/content/7/1/297b)these NPs may have application in solar energy capture or sunscreens. Fourier transform infrared (FT... nucleation and a growth stage by a single normal UV–vis absorbance spectrum (I-?) or a single fixed-wavelength dynamic scan (I-t) because both the nucleation and growth are, in fact, concurrent and cannot be clearly separated ei- 0 40 80 120 160 200 240 280...

Chen, Lan; Rahme, Kamil; Holmes, Justin D; Morris, Michael A; Slater, Nigel KH

2012-06-07T23:59:59.000Z

94

Optimal, real-time control--colliders  

Science Conference Proceedings (OSTI)

With reasonable definitions, optimal control is possible for both classical and quantal systems with new approaches called PISC(Parallel) and NISC(Neural) from analogy with RISC (Reduced Instruction Set Computing). If control equals interaction, observation and comparison to some figure of merit with interaction via external fields, then optimization comes from varying these fields to give design or operating goals. Structural stability can then give us tolerance and design constraints. But simulations use simplified models, are not in real-time and assume fixed or stationary conditions, so optimal control goes far beyond convergence rates of algorithms. It is inseparable from design and this has many implications for colliders. 12 refs., 3 figs.

Spencer, J.E.

1991-05-01T23:59:59.000Z

95

Real-time scheduling with regenerative energy  

E-Print Network (OSTI)

This paper investigates real-time scheduling in a system whose energy reservoir is replenished by an environmental power source. The execution of tasks is deemed primarily energy-driven, i.e., a task may only respect its deadline if its energy demand can be satisfied early enough. Hence, a useful scheduling policy should account for properties of the energy source, capacity of the energy storage as well as power dissipation of the single tasks. We show that conventional scheduling algorithms (like e.g. EDF) are not suitable for this scenario. Based on this motivation, we state and prove optimal scheduling algorithms that jointly handle constraints from both energy and time domain. Furthermore, an offline schedulability test for a set of periodic or even bursty tasks is presented. Finally, we validate the proposed theory by means of simulation and compare our algorithms with the classical Earliest Deadline First Algorithm. 1.

C. Moser; D. Brunelli; L. Thiele; L. Benini

2006-01-01T23:59:59.000Z

96

Hybrid power management in real time embedded systems: an interplay of DVFS and DPM techniques  

Science Conference Proceedings (OSTI)

Energy-aware scheduling of real time applications over multiprocessor systems is considered in this paper. Early research reports that while various energy-saving policies, for instance Dynamic Power Management (DPM) and Dynamic Voltage & Frequency ... Keywords: Dynamic power management, Dynamic voltage & frequency scaling, Energy, Machine learning, Multiprocessor scheduling, Power, Real time systems

Muhammad Khurram Bhatti; Cécile Belleudy; Michel Auguin

2011-03-01T23:59:59.000Z

97

Configurable model for real-time crane erection visualization  

Science Conference Proceedings (OSTI)

Detailed simulation and visualization of crane activities have been recently introduced to help engineers identify potential problems with critical erection tasks; however, the development of real-time erection visualizations for different types of cranes ... Keywords: Cooperative, Crane, Erection, Multibody, Physics Engine, Simulation, Visualization

Wei-Han Hung, Shih-Chung Kang

2013-11-01T23:59:59.000Z

98

Real Time Grid Reliability Management 2005  

E-Print Network (OSTI)

Environmental Research Energy Systems Integration Real Time2) integration with CA ISO energy management system (EMS);2) integration with CA ISO energy management system (EMS);

Eto, Joe

2008-01-01T23:59:59.000Z

99

Dynamic Simulation of a Helium Liquefier  

SciTech Connect

Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN2) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a JT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.

Maekawa, R.; Ooba, K.; Mito, T. [National Institute for Fusion Science, Toki, Gifu, 509-5292 (Japan); Nobutoki, M. [Nippon Sanso Co., Kawasaki, Kanagawa, 210-0861 (Japan)

2004-06-23T23:59:59.000Z

100

A Simplification of a Real-Time Verification Problem  

E-Print Network (OSTI)

We revisit the problem of real-time verification with dense dynamics using timeout and calendar based models and simplify this to a finite state verification problem. To overcome the complexity of verification of real-time systems with dense dynamics, Dutertre and Sorea, proposed timeout and calender based transition systems to model the behavior of real-time systems and verified safety properties using k-induction in association with bounded model checking. In this work, we introduce a specification formalism for these models in terms of Timeout Transition Diagrams and capture their behavior in terms of semantics of Timed Transition Systems. Further, we discuss a technique, which reduces the problem of verification of qualitative temporal properties on infinite state space of (a large fragment of) these timeout and calender based transition systems into that on clockless finite state models through a two-step process comprising of digitization and canonical finitary reduction. This technique enables us to ve...

Saha, Indranil; Roy, Suman; 10.1007/978-3-540-75596-8_21

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Certification of Instrumentation Techniques for Resources Management of Real-Time Systems.  

E-Print Network (OSTI)

??Dynamic real-time systems have to meet timing requirements in unpredictable environments, where available resources might vary, running tasks might change, and task workloads might differ.… (more)

Tan, Zhenyu

2005-01-01T23:59:59.000Z

102

Systemwide Energy Minimization in Real-Time Embedded Systems  

E-Print Network (OSTI)

Traditionally, dynamic voltage scaling (DVS) techniques have focused on minimizing the processor power consumption as opposed to the entire system energy. However, the slowdown resulting from DVS can increase the energy consumption of components like memory and network interfaces. Furthermore, leakage power consumption, which is increasing with the scaling device technology, must also be considered. In this paper, we present an algorithm to compute task slowdown factors based on the contribution of the processor leakage and standby energy consumption of the resources in the system. We combine slowdown with procrastination of task executions to extend sleep intervals which significantly reduces the leakage energy consumption. We show that the scheduling approach minimizes the total static and dynamic energy consumption of the systemwide resources. In this work, we consider a real-time system model using the Earliest Deadline First (EDF) policy. Our simulation experiments using randomly generated task sets show on an average 10% energy gains over traditional dynamic voltage scaling. Our procrastination scheme increases the average energy savings to 15%.

Ravindra Jejurikar; Rajesh Gupta

2004-01-01T23:59:59.000Z

103

A Survey of Utility Experience with Real Time Pricing  

E-Print Network (OSTI)

with Real Time Pricing Xcel Energy (Public Service Companywith Real Time Pricing Xcel Energy, MDC (MinnesotaUtilities Division). 2001. “Xcel Energy’s Real-Time Pricing

Barbose, Galen; Goldman, Charles; Neenan, Bernie

2004-01-01T23:59:59.000Z

104

JAVA & Parallelism/Real-time systems  

E-Print Network (OSTI)

Windowing Toolkit (AWT) in a memory-efficient way. JAVA Application Environment (JAE) Support enables the same applets and applications to run on other servers or platforms running the JAVA Virtual Machine. CHAPTER 2 Embedded and Real-Time JAVA According to the designers at Sun Microsystems, is JAVA also suitable for Embedded or Real-Time systems. Before proceeding further it is worth trying to define the phrase `real-time system' more precisely. 2.1 Definition of a real-time system There are many interpretations of the exact nature of a real-time system; however, they all have in common the notion of response time, the time taken for the system to generate output from some associated input. The Oxford Dictionary of Computing [48] gives the following definition of a real-time system. A real-time system is... Any system in which the time at which output is produced is significant. This is usually because the input corresponds to some movement in the physical world, and the output ha...

D. F. Nooren

1998-01-01T23:59:59.000Z

105

Real-time tessellation of terrain on graphics hardware  

Science Conference Proceedings (OSTI)

Synthetic terrain is a key element in many applications, which can lessen the sense of realism if it is not handled correctly. We propose a new technique for visualizing terrain surfaces by tessellating them on the GPU. The presented algorithm introduces ... Keywords: GPU, Level of detail, Real-time rendering, Terrain simulation, Tessellation

Oscar Ripolles; Francisco Ramos; Anna Puig-Centelles; Miguel Chover

2012-04-01T23:59:59.000Z

106

Precomputed local radiance transfer for real-time lighting design  

E-Print Network (OSTI)

This paper introduces a new method for real-time relighting of scenes illuminated by local light sources. We extend previous work on precomputed radiance transfer for distant lighting to local lighting by introducing the concept of unstructured light clouds. The unstructured light cloud enables a compact representation of local lights in the model and real-time rendering of complex models with full global illumination due to local light sources. We use simplification of lights, and clustered PCA to obtain a compressed representation. When storing only the indirect component of the illumination, we are able to get high quality with only 8– 16 lighting coefficients per vertex. Our results demonstrate real-time rendering of scenes with moving lights, dynamic cameras, glossy materials and global illumination.

Anders Wang Kristensen

2005-01-01T23:59:59.000Z

107

Real time sensor for therapeutic radiation delivery  

DOE Patents (OSTI)

The invention is a real time sensor for therapeutic radiation. A probe is placed in or near the patient that senses in real time the dose at the location of the probe. The strength of the dose is determined by either an insertion or an exit probe. The location is determined by a series of vertical and horizontal sensing elements that gives the operator a real time read out dose location relative to placement of the patient. The increased accuracy prevents serious tissue damage to the patient by preventing overdose or delivery of a dose to a wrong location within the body. 14 figs.

Bliss, M.; Craig, R.A.; Reeder, P.L.

1998-01-06T23:59:59.000Z

108

Real time sensor for therapeutic radiation delivery  

DOE Patents (OSTI)

The invention is a real time sensor for therapeutic radiation. A probe is placed in or near the patient that senses in real time the dose at the location of the probe. The strength of the dose is determined by either an insertion or an exit probe. The location is determined by a series of vertical and horizontal sensing elements that gives the operator a real time read out dose location relative to placement of the patient. The increased accuracy prevents serious tissue damage to the patient by preventing overdose or delivery of a dose to a wrong location within the body.

Bliss, Mary (West Richland, WA); Craig, Richard A. (West Richland, WA); Reeder, Paul L. (Richland, WA)

1998-01-01T23:59:59.000Z

109

High-Level Real-Time Concurrency  

E-Print Network (OSTI)

The primary goal of all real-time systems is predictability. Achieving this goal requires all levels of the system to be well de ned and have a xed worst-case execution time. These needs have resulted in the creation of overly restrictive commercial real-time systems providing only ad-hoc scheduling facilities and basic concurrent functionality. Ad-hoc scheduling makes developing, verifying, and maintaining a real-time system extremely dicult and time consuming. Basic concurrent functionality forces programmers to develop complex concurrent programs without the aid of high-level concurrency features.

Ashif S. Harji; C Ashif S. Harji

2000-01-01T23:59:59.000Z

110

Property:Real-Time | Open Energy Information  

Open Energy Info (EERE)

Real-Time Real-Time Jump to: navigation, search Property Name Real-Time Property Type String Pages using the property "Real-Time" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + No + 10-ft Wave Flume Facility + No + 11-ft Wave Flume Facility + No + 2 2-ft Flume Facility + No + 3 3-ft Wave Flume Facility + No + 5 5-ft Wave Flume Facility + No + 6 6-ft Wave Flume Facility + No + A Alden Large Flume + Yes + Alden Small Flume + Yes + Alden Tow Tank + Yes + Alden Wave Basin + Yes + B Breakwater Research Facility + No + Bucknell Hydraulic Flume + No + C Carderock 2-ft Variable Pressure Cavitation Water Tunnel + No + Carderock 3-ft Variable Pressure Cavitation Water Tunnel + No + Carderock Circulating Water Channel + No +

111

Real Time Energy Pricing Web Services Implementation  

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

Real Time Energy Pricing Web Services Implementation Speaker(s): Jim Boch Kim McCaffrey Robert Nawy Date: December 15, 2010 - 12:00pm Location: 90-3122 Seminar HostPoint of...

112

Real time estimation of Bayesian networks  

Science Conference Proceedings (OSTI)

For real time evaluation of a Bayesian network when there is not sufficient time to obtain an exact solution, a guaranteed response time, approximate solution is required. It is shown that non traditional methods utilizing estimators based on an archive ...

Robert L. Welch

1996-08-01T23:59:59.000Z

113

Real-time rendering systems in 2010  

Science Conference Proceedings (OSTI)

We present a case for future real-time rendering systems that support non-physically-correct global illumination techniques by using ray tracing visibility algorithms, by integrating scene management with rendering, and by executing on general-purpose ...

William R. Mark; Donald Fussell

2005-07-01T23:59:59.000Z

114

Real-Time Mesoscale Prediction on workstations  

Science Conference Proceedings (OSTI)

Experience in performing real-time mesoscale numerical prediction forecasts using the Regional Atmospheric Modeling System (RAMS) over Colorado for a winter season on high-performance workstations is summarized. Performance evaluation is done for ...

William R. Cotton; Gregory Thompson; Paul W. Mieike Jr.

1994-03-01T23:59:59.000Z

115

Real time PCR measurement by fluorescence anisotropy  

E-Print Network (OSTI)

Real-time polymerase chain reaction (PCR) is the gold-standard for quantitation in both mutation and gene expression analyses. Already this technique has found valuable clinical application in disease diagnosis and progression ...

Crane, Bryan Lee, 1976-

2005-01-01T23:59:59.000Z

116

Near Real-Time Push Middleware  

E-Print Network (OSTI)

Architecture.. 102 System Trial .. 109 Chapter 6 Electric vehicle smart charging and vehicle-to-gridSmart Grid, to address deficiencies in existing research, and to advance the state of the art in near real-time push architectures.

Mal, Siddhartha Byron

2012-01-01T23:59:59.000Z

117

Toward Real Time Data Analysis for Smart Grids  

Science Conference Proceedings (OSTI)

This paper describes the architecture and design of a novel system for supporting large-scale real-time data analysis for future power grid systems. The widespread deployment of renewable generation, smart grid controls, energy storage, plug-in hybrids, and new conducting materials will require fundamental changes in the operational concepts and principal components of the grid. As a result, the whole system becomes highly dynamic and requires constant adjusting based on real time data. Even though millions of sensors such as phase measurement units (PMU) and smart meters are being widely deployed, a data layer that can analyze this amount of data in real time is needed. Unlike the data fabric in other cloud services, the data layer for smart grids has some unique design requirements. First, this layer must provide real time guarantees. Second, this layer must be scalable to allow a large number of applications to access the data from millions of sensors in real time. Third, reliability is critical and this layer must be able to continue to provide service in face of failures. Fourth, this layer must be secure. We address these challenges though a scalable system architecture that integrates the I/O and data processing capability in a devise set of devices. Data process operations can be placed anywhere from sensors, data storage devices, to control centers. We further employ compression to improve performance. We design a lightweight compression customized for power grid data. Our system can reduce end-to-end response time by reduce I/O overhead through compression and overlap compression operations with I/O. The initial prototype of our system was demonstrated with several use cases from PNNL’s FPGI and show that our system can provide real time guarantees to a diverse set of applications.

Yin, Jian; Gorton, Ian; Sharma, Poorva

2012-11-10T23:59:59.000Z

118

A distributed hard real-time Java system for high mobility components  

E-Print Network (OSTI)

In this work we propose a methodology for providing real-time capabilities to component-based, on-the-fly recon?gurable, distributed systems. In such systems, software components migrate across computational resources at run-time to allow applications to adapt to changes in user requirements or to external events. We describe how we achieve run-time recon?guration in distributed Java applications by appropriately migrating servers. Guaranteed-rate schedulers at the servers provide the necessary temporal protection and so simplify remote method invocation management. We describe how we manage overhead and resource utilization by controlling the parameters of the server schedulers. According to our measurements, this methodology provides real-time capability to component-based recon?gurable distributed systems in an effcient and effective way. In addition, we propose a new resource discovery protocol, REALTOR, which is based on a combination of pull-based and push-based resource information dissemination. REALTOR has been designed for real-time component-based distributed applications in very dynamic or adverse environments. REALTOR supports survivability and information assurance by allowing the migration of components to safe locations under emergencies suchas externalattack, malfunction, or lackofresources. Simulation studies show that under normal and heavy load conditions REALTOR remains very effective in finding available resources, and does so with a reasonably low communication overhead.REALTOR 1)effectively locates resources under highly dynamic conditions, 2) has an overhead that is system-size independent, and 3) works well in highlyadverse environments.We evaluate the effectiveness of a REALTOR implementation as part of Agile Objects, an infrastructure for real-time capable, highly mobile Java components.

Rho, Sangig

2004-12-01T23:59:59.000Z

119

Axial Tomography from Digitized Real Time Radiography  

DOE R&D Accomplishments (OSTI)

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A. S.; McDonald, W. M.; Doupont, P. A.; McKinney, R. L.; Lee, M. M.

1985-01-18T23:59:59.000Z

120

Axial tomography from digitized real time radiography  

SciTech Connect

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A.S.; McDonald, W.M.; Doupont, P.A.; McKinney, R.L.; Lee, M.M.

1985-01-18T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real time monitoring in web telerobotics  

Science Conference Proceedings (OSTI)

There is a growing need for humans to perform complex remote operations and to extend the intelligence and experience of experts to distant applications. A blending of human intelligence, modern information technology, remote control, and intelligent ... Keywords: TCP/IP, UDP, control, internet, monitoring, real-time, telerobotics, web

Ionut Resceanu; Marius Niculescu; Cristina Pana

2008-07-01T23:59:59.000Z

122

Real-time var control by SCADA  

SciTech Connect

This paper outlines the operation and advantages of the SCADA capacitor control called CAPCON, developed by the Virginia Electric and Power Company (Virginia Power). CAPCON is used to control vars system-wide by switching substation capacitor banks based on real-time var and voltage data instead of the traditional time clock method.

Girotti, T.B.; Tweed, N.B.; Houser, N.R. (Virginia Power Co., Richmond, VA (USA))

1990-02-01T23:59:59.000Z

123

Real time video streaming over heterogeneous networks  

Science Conference Proceedings (OSTI)

Technological advances allow handheld devices to be equipped with faster processors and wireless interfaces, making the performance comparable to laptop Computers. In this paper, we describe real-time video streaming over heterogeneous networks namely ... Keywords: GPRS-EDGE, IEEE802.11, IETF, MPEG-4, PSS, RTCP, RTP, RTSP, bluetooth, performance, piconet, quality of service, video streaming, wireless LANs

Mohammed A. Qadeer; Rehan Ahmad; Mohd Siddique Khan; Tauseef Ahmad

2009-02-01T23:59:59.000Z

124

User customizable real-time fur  

Science Conference Proceedings (OSTI)

Recent advances in real-time fur rendering have enabled the development of more realistic furry characters. In this sketch, we outline a number of advances to the shell and fin based fur rendering technique by Lengyel et al [2001] using the pixel and ...

John Isidoro; Jason L. Mitchell

2002-07-01T23:59:59.000Z

125

Efficient real-time divisible load scheduling  

Science Conference Proceedings (OSTI)

Providing QoS and performance guarantees to arbitrarily divisible loads has become a significant problem for many cluster-based research computing facilities. While progress is being made in scheduling arbitrarily divisible loads, current approaches ... Keywords: Arbitrarily divisible loads, Cluster computing, Real-time computing, Scheduling efficiency

Anwar Mamat; Ying Lu; Jitender Deogun; Steve Goddard

2012-12-01T23:59:59.000Z

126

Real-time signal processing IV  

Science Conference Proceedings (OSTI)

The following topics were dealt with: parallel computation algorithms and architectures; very high-speed integrated circuit processing; multiple processor systems; real-time signal processing technologies and applications. 48 papers were presented, 40 of which are published in full in the present proceedings. Abstracts of individual papers can be found under the relevant classification codes in this or other issues.

Not Available

1981-01-01T23:59:59.000Z

127

Real-time individualized virtual humans  

Science Conference Proceedings (OSTI)

This tutorial will present the latest techniques to model fast individualized animatable virtual humans for Real-Time applications. As a human is composed of a head and a body, we will analyze how these two parts can be modeled and globally animated ...

Nadia Magnenat-Thalmann; Daniel Thalmann

2008-12-01T23:59:59.000Z

128

Real Time Grid Reliability Management 2005  

Science Conference Proceedings (OSTI)

The increased need to manage California?s electricity grid in real time is a result of the ongoing transition from a system operated by vertically-integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management -- construction of new transmission lines -- has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools. This project: (1) developed and conducted first-ever demonstrations of two prototype real-time software tools for voltage security assessment and phasor monitoring; and (2) prepared a scoping study on improving load and generator response models. Additional funding through two separate subsequent work authorizations has already been provided to build upon the work initiated in this project.

Eto, Joe; Eto, Joe; Lesieutre, Bernard; Lewis, Nancy Jo; Parashar, Manu

2008-07-07T23:59:59.000Z

129

Impact of storage on the efficiency and prices in real-time electricity markets  

Science Conference Proceedings (OSTI)

We study the effect of energy-storage systems in dynamic real-time electricity markets. We consider that demand and renewable generation are stochastic, that real-time production is affected by ramping constraints, and that market players seek to selfishly ... Keywords: electricity pricing, energy economics, energy storage system, market efficiency

Nicolas Gast, Jean-Yves Le Boudec, Alexandre Proutière, Dan-Cristian Tomozei

2013-01-01T23:59:59.000Z

130

Real Time Pricing and the Real Live Firm  

E-Print Network (OSTI)

response to electricity real-time prices: short run and longwith respect to real time prices has not been extensivelywere linked to real-time prices, most customers indicated

Moezzi, Mithra; Goldman, Charles; Sezgen, Osman; Bharvirkar, Ranjit; Hopper, Nicole

2004-01-01T23:59:59.000Z

131

A Survey of Utility Experience with Real Time Pricing  

E-Print Network (OSTI)

Response to Electricity Real-Time Prices: Short Run and Longat the prevailing real time price. Because only marginalService Rate RTP: Real Time Price Rate Experimental Day

Barbose, Galen; Goldman, Charles; Neenan, Bernie

2004-01-01T23:59:59.000Z

132

Wealth Transfers from Implementing Real-Time Retail Electricity Pricing  

E-Print Network (OSTI)

who are charged real-time prices. I discuss the politicalif customers exhibit real-time price elasticities of -0.1, Iit sees the actual real-time electricity price and responds.

Borenstein, Severin

2005-01-01T23:59:59.000Z

133

A Survey of Utility Experience with Real Time Pricing  

E-Print Network (OSTI)

Survey of Utility Experience with Real Time Pricing List ofUtility Experience with Real Time Pricing Table of Contents Acknowledgements iii Table of Contents..v List

Barbose, Galen; Goldman, Charles; Neenan, Bernie

2004-01-01T23:59:59.000Z

134

Multi-Criteria Optimisation using Past, Real Time and Predictive...  

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

Multi-Criteria Optimisation using Past, Real Time and Predictive Performance Benchmarks Title Multi-Criteria Optimisation using Past, Real Time and Predictive Performance...

135

Appendix C: California ISO Real Time Voltage Security Assessment...  

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

C: California ISO Real Time Voltage Security Assessment (VSA) Prototype Functional SpecificationsPrototype Development Title Appendix C: California ISO Real Time Voltage Security...

136

Appendix B: California ISO Real Time Voltage Security Assessment...  

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

B: California ISO Real Time Voltage Security Assessment (VSA) Summary Report Title Appendix B: California ISO Real Time Voltage Security Assessment (VSA) Summary Report Publication...

137

Appendix A: California ISO Real Time Voltage Security Assessment...  

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

A: California ISO Real Time Voltage Security Assessment (VSA) Project: Summary of Survey Results on Methodologies for use in Real-Time Voltage Security Assessment Title Appendix A:...

138

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Real-Time Chemical Imaging of Bacterial Biofilm Development Print Wednesday, 25 August 2010 00:00 Scientists have...

139

Wireless technology collects real-time information from oil and...  

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

Wireless technology collects real-time information from oil and gas wells Wireless technology collects real-time information from oil and gas wells The patented system delivers...

140

Definition: Real-Time Load Transfer | Open Energy Information  

Open Energy Info (EERE)

Real-time load transfer is achieved through real-time feeder reconfiguration and optimization to relieve load on equipment, improve asset utilization, improve distribution...

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

California ISO Real-Time Voltage Security Assessment (VSA) Project...  

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

Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT California ISO Real-Time Voltage Security Assessment (VSA) Project: Summary of Survey Results on Methodologies...

142

Reliability-aware power management for parallel real-time applications with precedence constraints  

Science Conference Proceedings (OSTI)

The negative effects of the Dynamic Voltage and Frequency Scaling (DVFS) technique on the system reliability has recently promoted the research on reliability-aware power management (RAPM). RAPM aims at reducing the system energy consumption while preserving ... Keywords: shared-recovery based scheme, reliability aware power management, parallel real-time application, precedence constraint, dynamic voltage technique, frequency scaling technique, parallel real time application, shared memory multiprocessor system, NP-hard problem, RAPM heuristics, dynamic slack, system reliability

Yifeng Guo; Dakai Zhu; H. Aydin

2011-07-01T23:59:59.000Z

143

Real time gamma-ray signature identifier  

DOE Patents (OSTI)

A real time gamma-ray signature/source identification method and system using principal components analysis (PCA) for transforming and substantially reducing one or more comprehensive spectral libraries of nuclear materials types and configurations into a corresponding concise representation/signature(s) representing and indexing each individual predetermined spectrum in principal component (PC) space, wherein an unknown gamma-ray signature may be compared against the representative signature to find a match or at least characterize the unknown signature from among all the entries in the library with a single regression or simple projection into the PC space, so as to substantially reduce processing time and computing resources and enable real-time characterization and/or identification.

Rowland, Mark (Alamo, CA); Gosnell, Tom B. (Moraga, CA); Ham, Cheryl (Livermore, CA); Perkins, Dwight (Livermore, CA); Wong, James (Dublin, CA)

2012-05-15T23:59:59.000Z

144

CRTF Real-Time Aperture Flux system  

SciTech Connect

The Real-Time Aperture Flux system (TRAF) is a test measurement system designed to determine the input power/unit area (flux density) during solar experiments conducted at the Central Receiver Test Facility, Sandia National Laboratories, Albuquerque, New Mexico. The RTAF is capable of using both thermal sensors and photon sensors to determine the flux densities in the RTAF measuring plane. These data are manipulated in various ways to derive input power and flux density distribution to solar experiments.

Davis, D.B.

1980-01-01T23:59:59.000Z

145

Demand Response-Enabled Model Predictive HVAC Load Control in Buildings using Real-Time Electricity Pricing.  

E-Print Network (OSTI)

??A practical cost and energy efficient model predictive control (MPC) strategy is proposed for HVAC load control under dynamic real-time electricity pricing. The MPC strategy… (more)

Avci, Mesut

2013-01-01T23:59:59.000Z

146

Real-time Pricing Demand Response in Operations  

Science Conference Proceedings (OSTI)

Abstract—Dynamic pricing schemes have been implemented in commercial and industrial application settings, and recently they are getting attention for application to residential customers. Time-of-use and critical-peak-pricing rates are in place in various regions and are being piloted in many more. These programs are proving themselves useful for balancing energy during peak periods; however, real-time (5 minute) pricing signals combined with automation in end-use systems have the potential to deliver even more benefits to operators and consumers. Besides system peak shaving, a real-time pricing system can contribute demand response based on the locational marginal price of electricity, reduce load in response to a generator outage, and respond to local distribution system capacity limiting situations. The US Department of Energy (DOE) is teaming with a mid-west electricity service provider to run a distribution feeder-based retail electricity market that negotiates with residential automation equipment and clears every 5 minutes, thus providing a signal for lowering or raising electric consumption based on operational objectives of economic efficiency and reliability. This paper outlines the capability of the real-time pricing system and the operational scenarios being tested as the system is rolled-out starting in the first half of 2012.

Widergren, Steven E.; Marinovici, Maria C.; Berliner, Teri; Graves, Alan

2012-07-26T23:59:59.000Z

147

AVESTAR® - Gasification Dynamic Simulator  

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

Meet Our Partners Simulators IGCC Gasification Combined Cycle NGCC SCOT Oxy-coal Shale Gas 3D Virtual IGCC Training How to Register for Training IGCC Gasification Combined...

148

Dynamic Infrared Simulation.  

E-Print Network (OSTI)

?? The increased usage of infrared sensors by pilots has created a growing demand for simulated environments based on infrared radiation. This has led to… (more)

Dehlin, Jonas

2006-01-01T23:59:59.000Z

149

Low-Power Design for Real-Time Systems  

Science Conference Proceedings (OSTI)

Real-time Systems often are located in the special environments where the power consumption is a big concern. Upon presence of timing constraints, the low power design on the real-time systems has significant impact on the performance as well as the ... Keywords: embedded system, instruction set, low power design, real time operating system, real time scheduling

Sheng-Tzong Cheng; Chia-Mei Chen; Jing-Wen Hwang

1998-09-01T23:59:59.000Z

150

Real-time static voltage scaling on multiprocessors  

Science Conference Proceedings (OSTI)

We propose a real-time static voltage scaling (RT-SVS) technique called T-L plane transforming, which is an extension of LLREF, an optimal real-time scheduling algorithm for multiprocessor systems. We present two RT-SVS algorithms for different types ... Keywords: energy consumption, multiprocessor systems, real-time scheduling, real-time voltage scaling

Kenji Funaoka; Shinpei Kato; Nobuyuki Yamasaki

2007-11-01T23:59:59.000Z

151

Real-Time Inference of Mental States from Facial Expressions and Upper Body Gestures  

E-Print Network (OSTI)

We present a real-time system for detecting facial action units and inferring emotional states from head and shoulder gestures and facial expressions. The dynamic system uses three levels of inference on progressively ...

Baltrusaitis, Tadas

152

Joint Reliability and Energy Management for Real-Time Embedded Systems.  

E-Print Network (OSTI)

?? The Dynamic Voltage Scaling (DVS) technique is the basis of numerous state-of-the-art energy management schemes proposed for real-time embedded systems. However, recent research has… (more)

Zhao, Baoxian

2012-01-01T23:59:59.000Z

153

Fluctuations in molecular dynamics simulations  

Science Conference Proceedings (OSTI)

Statistical fluctuations of a system about its equilibrium state, monitored in a molecular dynamics simulation, are an effective means of computing the thermodynamic and kinetic properties of interfaces in metals and alloys. In this work, three applications ... Keywords: Fluctuations, Grain boundaries, Interfaces, Interfacial free energy, Mobility, Molecular dynamics

J. J. Hoyt; Z. T. Trautt; M. Upmanyu

2010-03-01T23:59:59.000Z

154

A Molecular Dynamics Simulation  

Science Conference Proceedings (OSTI)

Ab Initio Local Energy and Local Stress Calculations: Applications to Materials ... Computational Fluid Dynamics and Experimental Results for the Horizontal .... Films and Applications to a New Generation of Multifunctional Devices/Systems.

155

Leakage-Aware Reallocation for Periodic Real-Time Tasks on Multicore Processors  

E-Print Network (OSTI)

It is an increasingly important issue to reduce the energy consumption of computing systems. In this paper, we consider partition based energy-aware scheduling of periodic real-time tasks on multicore processors. The scheduling exploits dynamic voltage scaling (DVS) and core sleep scheduling to reduce both dynamic and leakage energy consumption. If the overhead of core state switching is non-negligible, however, the performance of this scheduling strategy in terms of energy efficiency might degrade. To achieve further energy saving, we extend the static task scheduling with run-time task reallocation. The basic idea is to aggregate idle time among cores so that as many cores as possible could be put into sleep in a way that the overall energy consumption is reduced. Simulation results show that the proposed approach results in up to 20% energy saving over traditional leakage-aware DVS.

Huang, Hongtao; Wang, Jijie; Lei, Siyu; Wu, Guowei

2010-01-01T23:59:59.000Z

156

Real-TIme Raman Gas Composition Analyzer  

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

Analyzer Analyzer Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking collaborative research partners interested in implementing United States Provisional Patent Application entitled "Gas Sensing System Employing Raman Scattering". Disclosed in this application is a gas analyzing sensor that characterizes gaseous fuel, exhaust gases, or other process gas streams. The sensor reports concentrations of all majority gases at better than 0.3% accuracy in 1 second or less, and can be used for real-time gas analysis and system control. The sensor relies on novel techniques to enhance usually weak spontaneous Raman emissions from sample gases, enabling the application of Raman spectroscopy to rapid gas analysis. No commercially available sensor or sensing

157

October 2009Rethinking Real Time Electricity Pricing  

E-Print Network (OSTI)

Most US consumers are charged a near-constant retail price for electricity, despite substantial hourly variation in the wholesale market price. This paper evaluates the …rst program to expose residential consumers to hourly real time pricing (RTP). I …nd that enrolled households are statistically signi…cantly price elastic and that consumers responded by conserving energy during peak hours, but remarkably did not increase average consumption during o¤-peak times. Welfare analysis suggests that program households were not su ¢ ciently price elastic to generate e ¢ ciency gains that substantially outweigh the estimated costs of the advanced electricity meters required to observe hourly consumption. Although in electricity pricing, congestion pricing, and many other settings, economists’intuition is that prices should be aligned with marginal costs, residential RTP may provide an important real-world example of a situation where this is not currently welfare-enhancing given contracting or information costs.

Hunt Allcott; Hunt Allcott; Bill Hogan; Erich Muehlegger; Larry Katz; Erin Mansur; Sendhil Mullainathan; Paul Niehaus; Chris Nosko; Ariel Pakes; Dave Rapson; Rob Stavins; Frank Wolak

2009-01-01T23:59:59.000Z

158

Rethinking Real-Time Electricity Pricing  

E-Print Network (OSTI)

Most US consumers are charged a near-constant retail price for electricity, despite substantial hourly variation in the wholesale market price. This paper evaluates the …rst program to expose residential consumers to hourly real-time pricing (RTP). I …nd that enrolled households are statistically signi…cantly price elastic and that consumers responded by conserving energy during peak hours, but remarkably did not increase average consumption during o¤-peak times. The program increased consumer surplus by $10 per household per year. While this is only one to two percent of electricity costs, it illustrates a potential additional bene…t from investment in retail Smart Grid applications, including the advanced electricity meters required to observe a household’s hourly consumption.

Hunt Allcott; Bill Hogan; Erich Muehlegger; Larry Katz; Erin Mansur; Sendhil Mullainathan; Paul Niehaus; Chris Nosko; Ariel Pakes; Dave Rapson; Rob Stavins; Frank Wolak

2010-01-01T23:59:59.000Z

159

Real time speech formant analyzer and display  

DOE Patents (OSTI)

A speech analyzer for interpretation of sound includes a sound input which converts the sound into a signal representing the sound. The signal is passed through a plurality of frequency pass filters to derive a plurality of frequency formants. These formants are converted to voltage signals by frequency-to-voltage converters and then are prepared for visual display in continuous real time. Parameters from the inputted sound are also derived and displayed. The display may then be interpreted by the user. The preferred embodiment includes a microprocessor which is interfaced with a television set for displaying of the sound formants. The microprocessor software enables the sound analyzer to present a variety of display modes for interpretive and therapeutic used by the user. 19 figs.

Holland, G.E.; Struve, W.S.; Homer, J.F.

1987-02-03T23:59:59.000Z

160

System dynamics simulation of the telecom industry  

E-Print Network (OSTI)

The primary goal of this research effort was to integrate several pieces of relatively simple dynamics simulations into a full blown system dynamics simulation of the telecom industry. The economic simulation model was ...

Shapira, Gil, 1971-

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real Time Search User Behavior Real time search is an increasingly important area of  

E-Print Network (OSTI)

. Query Terms: the terms as entered by the user. Key concepts for search (i.e., the process of a searcher. The most frequently used terms accounted for only 0.03% of the total terms. Concerning search topics Web search. Searchers of real time content often repeat queries overtime, perhaps indicating long term

Jansen, James

162

Real-Time Precipitation Estimation Based on Index Station Percentiles  

Science Conference Proceedings (OSTI)

Operational hydrologic models are typically calibrated using meteorological inputs derived from retrospective station data that are commonly not available in real time. Inconsistencies between the calibration and (generally sparser) real-time ...

Qiuhong Tang; Andrew W. Wood; Dennis P. Lettenmaier

2009-02-01T23:59:59.000Z

163

Energy-conserving feedback EDF scheduling for embedded systems with real-time constraints  

Science Conference Proceedings (OSTI)

Embedded systems have limited energy resources. Hence, they should conserve these resources to extend their period of operation. Recently, dynamic frequency scaling (DFS) and dynamic voltage scaling (DVS) have been added to a various embedded processors ... Keywords: dynamic voltage scaling, real-time systems, scheduling

Ajay Dudani; Frank Mueller; Yifan Zhu

2002-07-01T23:59:59.000Z

164

Real Time Pricing and the Real Live Firm  

E-Print Network (OSTI)

2002. “Industrial response to electricity real-time prices:industrial customer operated their facility using hourly electricity prices

Moezzi, Mithra; Goldman, Charles; Sezgen, Osman; Bharvirkar, Ranjit; Hopper, Nicole

2004-01-01T23:59:59.000Z

165

Efficient scheduling of soft real-time applications on multiprocessors  

Science Conference Proceedings (OSTI)

In soft real-time applications, tasks are allowed to miss their deadlines. Thus, less-costly scheduling algorithms can be used at the price of occasional violations of timing constraints. This may be acceptable if reasonable tardiness bounds (i.e., bounds ... Keywords: Fairness, multiprocessors, quality-of-service, real-time scheduling, soft real-time applications, tardiness

Anand Srinivasan; James H. Anderson

2005-04-01T23:59:59.000Z

166

Real time reactive programming in lucid enriched with contexts  

Science Conference Proceedings (OSTI)

We present a synchronous approach to real-time reactive programming in Lucid enriched with contexts as first class objects. The declarative intensional approach allows real-time reactive programs to manipulate both events and state-based representations ... Keywords: contexts, formal verification, intensional programming, real-time reactive programming

Kaiyu Wan; Vasu Alagar; Joey Paquet

2004-09-01T23:59:59.000Z

167

Optimal Real-time Dispatch for Integrated Energy Systems  

E-Print Network (OSTI)

In these figures the real-time price is plotted on the rightto 6:00 PM 7.2.4.3 Real-time Prices City specific hourlyIn these figures the real-time price is plotted on the right

Firestone, Ryan Michael

2007-01-01T23:59:59.000Z

168

Platform-independent design for embedded real-time systems  

Science Conference Proceedings (OSTI)

With the increasing complexity of the emerging embedded real-time systems, traditional design approaches can not provide sufficient support for the development of these systems anymore. They especially lack the ability to trace and analyse real-time ... Keywords: platform-independent, real-time, system design

Jinfeng Huang; Jeroen P. M. Voeten; Andre Ventevogel; Leo van Bokhoven

2004-01-01T23:59:59.000Z

169

Error computation for predictable real-time software synthesis  

Science Conference Proceedings (OSTI)

Synthesizing an implementation from a model in a predictable way is one of the major challenges in real-time system design. In our previous work we addressed this problem by generating in real-time an execution path through a model and by synchronizing ... Keywords: error computation, predictable design, property prediction, real-time systems

Jeroen Voeten; Oana Florescu; Jinfeng Huang; Henk Corporaal

2011-04-01T23:59:59.000Z

170

Energy Management for Real-Time Embedded Systems with Reliability Requirements  

E-Print Network (OSTI)

With the continued scaling of CMOS technologies and reduced design margins, the reliability concerns induced by transient faults have become prominent. Moreover, the popular energy management technique dynamic voltage and frequency scaling (DVFS) has been shown to have direct and negative effects on reliability. In this work, for a set of real-time tasks, we focus on the slack allocation problem to minimize their energy consumption while preserving the overall system reliability. Building on our previous findings for a single real-time application where a recovery task was used to preserve reliability, we identify the problem of reliabilityaware energy management for multiple tasks as NP-hard and propose two polynomial-time heuristic schemes. We also investigate the effects of on-chip/off-chip workload decomposition on energy management, by considering a generalized power model. Simulation results show that ordinary energy management schemes could lead to drastically decreased system reliability, while the proposed reliability-aware heuristic schemes are able to preserve the system reliability and obtain significant energy savings at the same time.

Dakai Zhu; et al.

2006-01-01T23:59:59.000Z

171

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

172

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

173

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

174

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

175

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

176

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

177

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

178

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing bacterial biofilms. Almost all bacteria can form biofilms-dynamic communities of cells enclosed in self-produced matrices of polymers that stick to other bacteria or surfaces in water-containing environments. Coordinated collectively, these bacteria defend against antagonists, break down recalcitrant materials, and produce biofuels. Researchers from Berkeley Lab, Lawrence Livermore National Lab, and UC Berkeley coupled infrared (IR) rays from ALS Beamline 1.4.3 to the first open-channel microfluidic platform to determine the chemistry that shapes biofilm development. This combination of synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectromicroscopy and the microfluidic platform will have a significant impact on several scientific disciplines that require chemical-scale information on biofilm phenotype and function, including Berkeley Lab's bioenergy efforts and subsurface biogeochemical studies.

179

Real-time individualized training vectors for experiential learning.  

Science Conference Proceedings (OSTI)

Military training utilizing serious games or virtual worlds potentially generate data that can be mined to better understand how trainees learn in experiential exercises. Few data mining approaches for deployed military training games exist. Opportunities exist to collect and analyze these data, as well as to construct a full-history learner model. Outcomes discussed in the present document include results from a quasi-experimental research study on military game-based experiential learning, the deployment of an online game for training evidence collection, and results from a proof-of-concept pilot study on the development of individualized training vectors. This Lab Directed Research & Development (LDRD) project leveraged products within projects, such as Titan (Network Grand Challenge), Real-Time Feedback and Evaluation System, (America's Army Adaptive Thinking and Leadership, DARWARS Ambush! NK), and Dynamic Bayesian Networks to investigate whether machine learning capabilities could perform real-time, in-game similarity vectors of learner performance, toward adaptation of content delivery, and quantitative measurement of experiential learning.

Willis, Matt; Tucker, Eilish Marie; Raybourn, Elaine Marie; Glickman, Matthew R.; Fabian, Nathan

2011-01-01T23:59:59.000Z

180

Real-time power system analysis: Feasibility and critical technologies  

Science Conference Proceedings (OSTI)

Modern electrical grids face increasing demands to serve new or unusual loads, to integrate unconventional new resources, and to transmit power in unforeseen ways. These expanding demands will require utilities to operate existing systems closer to steady-state limits, thus increasing the performance requirements of operation and control systems. In this paper we use the challenges posed by power system stability analysis to motivate a discussion of the technologies required to advance the state-of-the-art in real-time power system control. We consider the computational requirements of system stability analysis techniques (transient simulation, eigenanalysis, time-domain fitting, and frequency-response analysis). Additional requirements are imposed by the necessity that the computational results support either human or automated decision making. We then address the role that critical computer and information technologies must play in addressing these needs. Our emphasis is on high performance computing, where we consider both hardware issues and algorithmic requirements. Data management, user interface, visualization, and expert system technologies are also discussed. We conclude by suggesting elements of a strategic plan for creating the next generation of computer tools for power system analysis, and for their use in real-time control applications. 18 refs.

Pearson, E.W.; Trudnowski, D.J. (Battelle Pacific Northwest Lab., Richland, WA (United States)); Hauer, J.F.; Watkins, D.S. (USDOE Bonneville Power Administration, Portland, OR (United States))

1991-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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.


181

Radiation in molecular dynamic simulations  

DOE Green Energy (OSTI)

Hot dense radiative (HDR) plasmas common to Inertial Confinement Fusion (ICF) and stellar interiors have high temperature (a few hundred eV to tens of keV), high density (tens to hundreds of g/cc) and high pressure (hundreds of Megabars to thousands of Gigabars). Typically, such plasmas undergo collisional, radiative, atomic and possibly thermonuclear processes. In order to describe HDR plasmas, computational physicists in ICF and astrophysics use atomic-scale microphysical models implemented in various simulation codes. Experimental validation of the models used to describe HDR plasmas are difficult to perform. Direct Numerical Simulation (DNS) of the many-body interactions of plasmas is a promising approach to model validation but, previous work either relies on the collisionless approximation or ignores radiation. We present a new numerical simulation technique to address a currently unsolved problem: the extension of molecular dynamics to collisional plasmas including emission and absorption of radiation. The new technique passes a key test: it relaxes to a blackbody spectrum for a plasma in local thermodynamic equilibrium. This new tool also provides a method for assessing the accuracy of energy and momentum exchange models in hot dense plasmas. As an example, we simulate the evolution of non-equilibrium electron, ion, and radiation temperatures for a hydrogen plasma using the new molecular dynamics simulation capability.

Glosli, J; Graziani, F; More, R; Murillo, M; Streitz, F; Surh, M

2008-10-13T23:59:59.000Z

182

Real-time road traffic forecasting using regime-switching space-time models and adaptive LASSO  

Science Conference Proceedings (OSTI)

Smart transportation technologies require real-time traffic prediction to be both fast and scalable to full urban networks. We discuss a method that is able to meet this challenge while accounting for nonlinear traffic dynamics and space-time dependencies ... Keywords: adaptive LASSO, real-time predictions, threshold regressions, traffic forecasting

Yiannis Kamarianakis; Wei Shen; Laura Wynter

2012-07-01T23:59:59.000Z

183

Real Time Flux Control in PM Motors  

SciTech Connect

Significant research at the Oak Ridge National Laboratory (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) is being conducted to develop ways to increase (1) torque, (2) speed range, and (3) efficiency of traction electric motors for hybrid electric vehicles (HEV) within existing current and voltage bounds. Current is limited by the inverter semiconductor devices' capability and voltage is limited by the stator wire insulation's ability to withstand the maximum back-electromotive force (emf), which occurs at the upper end of the speed range. One research track has been to explore ways to control the path and magnitude of magnetic flux while the motor is operating. The phrase, real time flux control (RTFC), refers to this mode of operation in which system parameters are changed while the motor is operating to improve its performance and speed range. RTFC has potential to meet an increased torque demand by introducing additional flux through the main air gap from an external source. It can augment the speed range by diverting flux away from the main air gap to reduce back-emf at high speeds. Conventional RTFC technology is known as vector control [1]. Vector control decomposes the stator current into two components; one that produces torque and a second that opposes (weakens) the magnetic field generated by the rotor, thereby requiring more overall stator current and reducing the efficiency. Efficiency can be improved by selecting a RTFC method that reduces the back-emf without increasing the average current. This favors methods that use pulse currents or very low currents to achieve field weakening. Foremost in ORNL's effort to develop flux control is the work of J. S. Hsu. Early research [2,3] introduced direct control of air-gap flux in permanent magnet (PM) machines and demonstrated it with a flux-controlled generator. The configuration eliminates the problem of demagnetization because it diverts all the flux from the magnets instead of trying to oppose it. It is robust and could be particularly useful for PM generators and electric vehicle drives. Recent efforts have introduced a brushless machine that transfers a magneto-motive force (MMF) generated by a stationary excitation coil to the rotor [4]. Although a conventional PM machine may be field weakened using vector control, the air-gap flux density cannot be effectively enhanced. In Hsu's new machine, the magnetic field generated by the rotor's PM may be augmented by the field from the stationery excitation coil and channeled with flux guides to its desired destination to enhance the air-gap flux that produces torque. The magnetic field can also be weakened by reversing the current in the stationary excitation winding. A patent for advanced technology in this area is pending. Several additional RTFC methods have been discussed in open literature. These include methods of changing the number of poles by magnetizing and demagnetizing the magnets poles with pulses of current corresponding to direct-axis (d-axis) current of vector control [5,6], changing the number of stator coils [7], and controlling the air gap [8]. Test experience has shown that the magnet strengths may vary and weaken naturally as rotor temperature increases suggesting that careful control of the rotor temperature, which is no easy task, could yield another method of RTFC. The purpose of this report is to (1) examine the interaction of rotor and stator flux with regard to RTFC, (2) review and summarize the status of RTFC technology, and (3) compare and evaluate methods for RTFC with respect to maturity, advantages and limitations, deployment difficulty and relative complexity.

Otaduy, P.J.

2005-09-27T23:59:59.000Z

184

Real-Time Optimization Strategies for Building Systems  

E-Print Network (OSTI)

Jul 2, 2011 ... Abstract: We propose real-time optimization strategies for energy ... reductions of energy intensity compared with traditional strategies.

185

Low Dose Radiation Research Program: Real-Time Molecular Study...  

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

Real-Time Molecular Study of Bystander Effects Using Imaging and Nano-Particle Optics Mohan Natarajan University of Texas Health Science Center Why this Project? To develop...

186

EIA releases energy infrastructure map with real-time ...  

U.S. Energy Information Administration (EIA)

With peak hurricane season approaching, the U.S. Energy Information Administration (EIA) is introducing interactive maps that combine real-time data ...

187

Real-Time Chemical Imaging of Bacterial Biofilm Development  

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

Real-Time Chemical Imaging of Bacterial Biofilm Development Print Scientists have developed a robust and label-free method to probe the chemical underpinnings of developing...

188

Tracking Living Cells as They Differentiate in Real Time  

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

at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time,...

189

A Survey of Utility Experience with Real Time Pricing  

E-Print Network (OSTI)

CA. November 15. Electric Power Research Institute (EPRI).with Real Time Pricing Electric Power Research Institute (Electric) 67 American Electric Power (Public Service

Barbose, Galen; Goldman, Charles; Neenan, Bernie

2004-01-01T23:59:59.000Z

190

Towards a High Quality Real-Time Graphics Pipeline.  

E-Print Network (OSTI)

??Modern graphics hardware pipelines create photorealistic images with high geometric complexity in real time. The quality is constantly improving and advanced techniques from feature film… (more)

Munkberg, Jacob

2011-01-01T23:59:59.000Z

191

Vector Graphics for Real-time 3D Rendering.  

E-Print Network (OSTI)

??Algorithms are presented that enable the use of vector graphics representations of images in texture maps for 3D real time rendering. Vector graphics images are… (more)

Qin, Zheng

2009-01-01T23:59:59.000Z

192

Sensor Technology for Real Time Monitoring of Molten Salt ...  

Science Conference Proceedings (OSTI)

Presentation Title, Sensor Technology for Real Time Monitoring of Molten Salt Electrolytes During Nuclear Fuel Electrorefining. Author(s), Michael F. Simpson, ...

193

Method for real-time analysis of biosensor data  

Disclosure Number 200501550 Technology Summary This invention is a method for real-time rapid analysis of data that is collected by biosensors or ...

194

Simulation of the heat exchangers dynamics in MATLAB&simulink  

Science Conference Proceedings (OSTI)

Heat exchangers that transfer energy from flue gas to steam are important units of thermal power stations. Their inertias are often decisive for the design of the steam temperature control system. In this paper, the analysis and the simulation of the ... Keywords: MATLAB&simulink, S-functions, finite difference method, heat exchangers, partial differential equations, real-time, simulation, superheaters

Pavel Nevriva; Stepan Ozana; Ladislav Vilimec

2009-10-01T23:59:59.000Z

195

RAPIDS User's Manual Real-Time Group  

E-Print Network (OSTI)

of the simulator is implemented in Tcl7.5/Tk4.1. It can be run on machines where Tcl/Tk libraries are available. Obtaining and installing Tcl/Tk is not covered in this manual. PVM software is required more details

Massachusetts at Amherst, University of

196

MONOCULAR OPTICAL FLOW FOR REAL-TIME VISION SYSTEMS  

E-Print Network (OSTI)

MONOCULAR OPTICAL FLOW FOR REAL-TIME VISION SYSTEMS Stephen M. Benoit and Frank P. Ferrie TR-CIM-96 268510 FAX: 514 398-7348 Email: cim@cim.mcgill.ca #12;MONOCULAR OPTICAL FLOW FOR REAL-TIME VISION SYSTEMS

Dudek, Gregory

197

Towards the compositional verification of real-time UML designs  

Science Conference Proceedings (OSTI)

Current techniques for the verification of software as e.g. model checking are limited when it comes to the verification of complex distributed embedded real-time systems. Our approach addresses this problem and in particular the state explosion problem ... Keywords: embedded systems, object constraint language (OCL), pattern, real-time, unified modelling language (UML)

Holger Giese; Matthias Tichy; Sven Burmester; Wilhelm Schäfer; Stephan Flake

2003-09-01T23:59:59.000Z

198

Detection and tracking of driver's hands in real time  

Science Conference Proceedings (OSTI)

In this paper a complete driver's hands detection and tracking system suitable for working in real time conditions has been developed. The proposed system has been successfully tested in close-real world conditions in different scenarios on a very realistic ... Keywords: automotive application, image processing, real time, tracking

Raúl Crespo; Isaac Martín De Diego; Cristina Conde; Enrique Cabello

2010-11-01T23:59:59.000Z

199

Real-time Remote Sensing of Snowmobiles Emissions at  

E-Print Network (OSTI)

Real-time Remote Sensing of Snowmobiles Emissions at Yellowstone National Park: An Oxygenated Fuel 68509 #12;Real-time Remote Sensing of Snowmobile Emissions at Yellowstone National Park 2 Executive Summary In the winter of 1999, the University of Denver conducted a remote sensing study at Yellowstone

Denver, University of

200

A timeband framework for modelling real-time systems  

Science Conference Proceedings (OSTI)

Complex real-time systems must integrate physical processes with digital control, human operation and organisational structures. New scientific foundations are required for specifying, designing and implementing these systems. One key challenge is to ... Keywords: Cyber physical, Modelling, Real-time systems

Alan Burns; Ian J. Hayes

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Neural Networks for Real-Time Traffic Signal Control  

Science Conference Proceedings (OSTI)

Real-time traffic signal control is an integral part of the urban traffic control system, and providing effective real-time traffic signal control for a large complex traffic network is an extremely challenging distributed control problem. This paper ... Keywords: Distributed control, hybrid model, neural control, online learning, traffic signal control

D. Srinivasan; Min Chee Choy; R. L. Cheu

2006-09-01T23:59:59.000Z

202

Matching customer requests to service offerings in real-time  

Science Conference Proceedings (OSTI)

Classic request-response Service-oriented architecture (SOA) has reached a level of maturity where SOA inspired extensions are enabling new and creative domains like the Internet of Things, real-time business or real-time Web. These new domains impose ... Keywords: SOA, complex event processing, mediation, nonfunctional properties, service selection

Marcel Tilly; Stephan Reiff-Marganiec

2011-03-01T23:59:59.000Z

203

Overhead elimination mechanisms in real-time systems  

Science Conference Proceedings (OSTI)

The OEM (Overhead Elimination Mechanism), a scheduler for finding minimal overheads with reduced context switches in real-time systems, was developed using procedural methods. Software produced by these methods has often proven to be inflexible and difficult ... Keywords: Real-time scheduling, context switches, object-oriented, procedural, rate monotonic algorithm

Ilhyun Lee; Haesun K. Lee; Narayan Debnath

2006-04-01T23:59:59.000Z

204

Real-Time Camera Planning for Navigation in Virtual Environments  

Science Conference Proceedings (OSTI)

In this work, we have developed a real-time camera control module for navigation in virtual environments. With this module, the tracking motion of a third-person camera can be generated automatically to allow a user to focus on the control of an avatar. ... Keywords: Budget-based Planning, Intelligent Cam-era Control, Probabilistic Roadmap, Real-Time Camera Planning

Tsai-Yen Li; Chung-Chiang Cheng

2008-08-01T23:59:59.000Z

205

Challenge benchmarks for verification of real-time programs  

Science Conference Proceedings (OSTI)

Real-time systems, and in particular safety-critical systems, are a rich source of challenges for the program verification community as software errors can have catastrophic consequences. Unfortunately, it is nearly impossible to find representative ... Keywords: java, real-time, verification

Tomas Kalibera; Pavel Parizek; Ghaith Haddad; Gary T. Leavens; Jan Vitek

2010-01-01T23:59:59.000Z

206

Practical on-line dvs scheduling for fixed-priority real-time systems  

E-Print Network (OSTI)

We present an on-line Dynamic Voltage Scaling (DVS) algorithm for preemptive fixed-priority real-time systems called low power Limited Demand Analysis with Transition overhead (lpLDAT). It is the first algorithm in its class to explicitly account for transition overhead, and can reduce the energy consumption by as much as 40 % when compared to previous methods. 1.

Bren Mochocki; Xiaobo Sharon Hu

2005-01-01T23:59:59.000Z

207

Runtime architecture adaptation for energy management in embedded real-time systems  

Science Conference Proceedings (OSTI)

Energy consumption has long been recognized as an important performance metric for many real-time and embedded systems. The traditional approach to energy-aware computing is to dynamically scale the voltage: this results in a significant drop in the ...

H. Wang; I. Koren; C. M. Krishna

2012-06-01T23:59:59.000Z

208

Adaptive energy-efficient scheduling for real-time tasks on DVS-enabled heterogeneous clusters  

Science Conference Proceedings (OSTI)

Developing energy-efficient clusters not only can reduce power electricity cost but also can improve system reliability. Existing scheduling strategies developed for energy-efficient clusters conserve energy at the cost of performance. The performance ... Keywords: Adaptivity, Cluster, Dynamic voltage scaling, Energy-efficient, Real-time, Scheduling

Xiaomin Zhu; Chuan He; Kenli Li; Xiao Qin

2012-06-01T23:59:59.000Z

209

Efficient and Precise Cache Behavior Prediction for Real-TimeSystems  

Science Conference Proceedings (OSTI)

Abstract interpretation is a technique for the static detection of dynamic properties of programs. It is semantics based, that is, it computes approximative properties of the semantics of programs. On this basis, it supports correctness proofs of ... Keywords: abstract interpretation, cache behavior prediction, cache memories, program analysis, real time applications, worst case execution time prediction

Christian Ferdinand; Reinhard Wilhelm

1999-12-01T23:59:59.000Z

210

GPU-accelerated multi-valued solid voxelization by slice functions in real time  

Science Conference Proceedings (OSTI)

This paper presents a GPU-accelerated slice-independent solid voxelization approach that utilizes a dynamic slice function mechanism and masking techniques to significantly improve solid voxelization speed in real time as well as create various multi-valued ... Keywords: GPU acceleration, masking, solid slice function, solid voxelization, volume modeling

Duoduo Liao

2008-04-01T23:59:59.000Z

211

Reviewing real-time performance of nuclear reactor safety systems  

SciTech Connect

The purpose of this paper is to recommend regulatory guidance for reviewers examining real-time performance of computer-based safety systems used in nuclear power plants. Three areas of guidance are covered in this report. The first area covers how to determine if, when, and what prototypes should be required of developers to make a convincing demonstration that specific problems have been solved or that performance goals have been met. The second area has recommendations for timing analyses that will prove that the real-time system will meet its safety-imposed deadlines. The third area has description of means for assessing expected or actual real-time performance before, during, and after development is completed. To ensure that the delivered real-time software product meets performance goals, the paper recommends certain types of code-execution and communications scheduling. Technical background is provided in the appendix on methods of timing analysis, scheduling real-time computations, prototyping, real-time software development approaches, modeling and measurement, and real-time operating systems.

Preckshot, G.G. [Lawrence Livermore National Lab., CA (United States)

1993-08-01T23:59:59.000Z

212

Technical Section: Stream-based animation of real-time crowd scenes  

Science Conference Proceedings (OSTI)

We present a new way of drawing a crowd of animated characters in real-time. Previous work has focused almost exclusively on how to visualize ever larger crowd scenes and the current state-of-the-art can display tens of thousands of virtual humans with ... Keywords: Animation, Crowd simulation, OpenCL

Wayne Daniel Lister; Andy Day

2012-10-01T23:59:59.000Z

213

Integrated system for control and monitoring in real time of efficient electrical and thermal energy production  

Science Conference Proceedings (OSTI)

The integrated monitoring and driving system is made of main distributed components: - first level:_one or two computers placed in the control room which monitors the thermal and electrical processes based on the datas provided by the second level via ... Keywords: cogenerative gas power plant, control of distributed parameter systems, distribution management system, electric power systems, optimization, process control, real time systems, simulation

Ion Miciu; Florin Hartescu

2008-08-01T23:59:59.000Z

214

Can Real-Time Machine Translation Overcome Language Barriers in Distributed Requirements Engineering?  

E-Print Network (OSTI)

distant cultures with different languages and communication styles that, in turn, exacerbate communication software development requires close cooperation of individuals with distant cultural backgrounds. Cultural to explore the performance of MT in real-time text chat. The findings from our simulation are presented

Lanubile, Filippo

215

Sensing Requirements for Real-Time Monitoring and Control in Energy Production  

E-Print Network (OSTI)

of coal (syngas), requires physical and chemical sensors for exhaust gas monitoring as well as real-time control of the combustion process. Following a description of syngas production from coal, we outline species at 630 °C. Our SiC sensor can monitor the hydrogen concentration in a 350 °C simulated syngas

Ghosh, Ruby N.

216

ME EET Seminar: Real-time Predictive Control: From Automotive Systems to  

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

Real-time Predictive Control: From Automotive Systems to Real-time Predictive Control: From Automotive Systems to Energy Efficient Buildings Speaker(s): Francesco Borrelli Date: February 10, 2010 - 12:00pm Location: 90-3122 Hybrid systems are heterogeneous systems that exhibit both continuous and discrete dynamics. Over the last eight years we have focused on the development of systematic, real-time, predictive controller synthesis techniques for hybrid systems with constraints. In this talk I will first summarize our theoretical efforts starting from constrained optimal control design for hybrid systems with constraints. Then, I will show how these results can be used in order to develop a theory for distributed predictive control for large-scale systems. The second part of the talk presents a range of applications where the proposed techniques were used with great

217

RTJBench: A RealTime Java Benchmarking Framework  

E-Print Network (OSTI)

Abstract. The paper gives an overview of RTJBench, a framework designed to assist in the task of benchmarking programs written in the Real-Time Specification for Java, but with potentially more general applicability. RTJBench extends the JUnit framework for unit testing of Java applications with tools for real-time environment configuration, simple data processing and configurable graphical presentation services. We present design principles of RTJBench and give an example of a benchmarking suite we have been using for daily regression benchmarking of the Open Virtual Machine. Keywords: Benchmarking, regression benchmarking, Real-Time Specification for Java

Marek Prochazka; Andrey Madan; Jan Vitek; Wenchang Liu

2004-01-01T23:59:59.000Z

218

Harmonizing Melodies in Real-Time: the Connectionist Approach  

E-Print Network (OSTI)

We describe a sequential neural network for harmonizing melodies in real time. It models aspects of human cognition. This neural network succeeds reasonably well, if we take into consideration the constraints imposed by real time processing. The model exploits efficiently the available sequential information. The net contains a sub-net for meter that produces a periodic index of meter, providing the needed metric awareness. The net learns the relations between important notes of the melody and their harmonies and is able to produce harmonies for new melodies in real time, i.e., without knowledge of the future development of the melody.

Dan Gang; Daniel Lehmann; Naftali Wagner

1997-01-01T23:59:59.000Z

219

Formal specification of real-time dependable systems  

Science Conference Proceedings (OSTI)

The complex and critical nature of real-time, dependable systems (henceforth referred to as RTD systems) necessitates the use of analyzable specifications and specification analysis techniques supporting the assessment of behavioral, safety-critical, ... Keywords: analyzable specifications, behavioral quality, consistency check, fault-tolerant quality, formal reasoning systems, formal specification, multilevel description, nonfunctional qualities, precise specification language, real-time dependable systems, real-time systems, safety-critical quality, safety-critical software, security of data, security quality, software fault tolerance, specification analysis techniques, specification languages, system monitoring

1995-11-01T23:59:59.000Z

220

Real-time energy management control for hybrid electric powertrains  

Science Conference Proceedings (OSTI)

This paper focuses on embedded control of a hybrid powertrain concepts for mobile vehicle applications. Optimal robust control approach is used to develop a real-time energy management strategy. The main idea is to store the normally wasted mechanical ...

Mohamed Zaher, Sabri Cetinkunt

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real time reconstruction of quasiperiodic multi parameter physiological signals  

E-Print Network (OSTI)

A modern intensive care unit (ICU) has automated analysis systems that depend on continuous uninterrupted real time monitoring of physiological signals such as electrocardiogram (ECG), arterial blood pressure (ABP), and ...

Ganeshapillai, Gartheeban

222

Real-Time ALARA Plan Tracking Tool: Phase 1  

Science Conference Proceedings (OSTI)

The primary objective of this project was to develop a generic industry template for tracking and trending live, Real Time (RT) exposure data by task and RWP (Radiation Work Permit).

2007-04-11T23:59:59.000Z

223

Microwave Plasma Monitoring System For Real-Time Elemental Analysis  

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

Microwave Plasma Monitoring System For Real-Time Elemental Analysis Microwave Plasma Monitoring System For Real-Time Elemental Analysis Microwave Plasma Monitoring System For Real-Time Elemental Analysis The invention apparatus can also be used to monitor for the presence of halogens, sulfur and silicon. Available for thumbnail of Feynman Center (505) 665-9090 Email Microwave Plasma Monitoring System For Real-Time Elemental Analysis There has been invented a process for analyzing ambient air in a microwave induced plasma without use of an additional carrier gas. There has also been invented an apparatus for analyzing ambient air, other sample gas, or nebulized and desolvated liquids wherein a novel arrangement of plasma gas and sample gas conduits is used to enhance dependability of the plasma. This apparatus embodiment of the invention has a concentric arrangement of

224

Definition: Real-Time Load Measurement And Management | Open Energy  

Open Energy Info (EERE)

Management Management Jump to: navigation, search Dictionary.png Real-Time Load Measurement And Management This function provides real-time measurement of customer consumption and management of load through Advanced Metering Infrastructure (AMI) systems (smart meters, two-way communications) and embedded appliance controllers that help customers make informed energy use decisions via real-time price signals, time-of-use (TOU) rates, and service options.[1] Related Terms advanced metering infrastructure, time-of-use pricing, smart grid References ↑ SmartGrid.gov 'Description of Functions' An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Real-Time_Load_Measurement_And_Management&oldid=493115

225

A Survey of Utility Experience with Real Time Pricing  

E-Print Network (OSTI)

and access to hourly energy usage data .. 26access to their hourly energy usage data on a real-time orfor Access to hourly energy usage data on a real- price

Barbose, Galen; Goldman, Charles; Neenan, Bernie

2004-01-01T23:59:59.000Z

226

Software development with real-time collaborative editing  

E-Print Network (OSTI)

This thesis presents Collabode, a web-based integrated development environment for Java. With real-time collaborative editing, multiple programmers can use Collabode to edit the same source code at the same time. Collabode ...

Goldman, Max, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

227

List Processing in Real Time on a Serial Computer  

E-Print Network (OSTI)

A real-time list processing system is one in which the time required by each elementary list operation (CONS, CAR, CDR, RPLACA, RPLACD, EQ, and ATOM in LISP) is bounded by a (small) constant. Classical list processing ...

Baker, Henry G. Jr.

1977-04-01T23:59:59.000Z

228

Towards Near Real-Time Availability With Enhanced Accuracy Turbo...  

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

Turbo" ARSCL Towards Near Real-Time Availability With Enhanced Accuracy Turbo-ARSCL Project The goal is to speed delivery of the widely-used ARSCL product while improving the...

229

FBLT: a real-time contention manager with improved schedulability  

Science Conference Proceedings (OSTI)

We consider software transactional memory (STM) concurrency control for embedded multicore real-time software, and present a novel contention manager for resolving transactional conflicts, called FBLT. We upper bound transactional retries and task response ...

Mohammed Elshambakey, Binoy Ravindran

2013-03-01T23:59:59.000Z

230

Real-time analog acquisition of electrophysiological signals with Soma  

E-Print Network (OSTI)

Soma is a high-density recording system for real-time acquisition and analysis of extracellular electrophysiological signals. Here I describe the design, implementation, and evaluation of the Soma Acquisition Board, an ...

Jonas, Eric Michael

2009-01-01T23:59:59.000Z

231

Available Technologies: Real-Time Monitoring of Plant ...  

... which act as common building blocks of plant ... the gases emitted by the living plant tissue are analyzed in real-time for emissions of 13C in both organic ...

232

MJO Initiation in the Real-Time Multivariate MJO Index  

Science Conference Proceedings (OSTI)

Madden–Julian oscillation (MJO) initiation in the real-time multivariate MJO (RMM) index is explored through an analysis of observed case studies and composite events. Specific examples illustrate that both the dates of MJO initiation and the ...

Katherine H. Straub

2013-02-01T23:59:59.000Z

233

NETL: Gasification Systems - Real Time Flame Monitoring of Gasifier...  

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

Real Time Flame Monitoring of Gasifier Burner and Injectors Project No.: DE-FC26-02NT41585 Gas Technology Institute is developing a reliable, practical, and cost effective means to...

234

Real-time Java has become already real  

Science Conference Proceedings (OSTI)

Enhanced complexity of the designed real-time computer systems requires that the developers seek for efficient methods and tools to solve the posed problems. The most obvious and simple approach is to employ technologies that have demonstrated their ...

S. N. Zyl'

2011-05-01T23:59:59.000Z

235

New Real-Time Quantum Efficiency Measurement System: Preprint  

DOE Green Energy (OSTI)

This paper describes a newly developed technique for measuring the quantum eficiiency in solar cells in real-time using a unique, electronically controlled, full-spectrum light source.

Young, D. L.; Egaas, B.; Pinegar, S.; Stradins, P.

2008-05-01T23:59:59.000Z

236

Decoupled Sampling for Real-Time Graphics Pipelines  

E-Print Network (OSTI)

We propose decoupled sampling, an approach that decouples shading from visibility sampling in order to enable motion blur and depth-of-field at reduced cost. More generally, it enables extensions of modern real-time graphics ...

Ragan-Kelley, Jonathan

2010-03-29T23:59:59.000Z

237

Exploiting temporal coherence in real-time rendering  

Science Conference Proceedings (OSTI)

Temporal coherence (TC), the correlation of contents between adjacent rendered frames, exists across a wide range of scenes and motion types in practical real-time rendering. By taking advantage of TC, we can save redundant computation and improve ...

Daniel Scherzer; Lei Yang; Oliver Mattausch

2010-12-01T23:59:59.000Z

238

Event Order Abstraction for Parametric Real-Time System Verification  

E-Print Network (OSTI)

We present a new abstraction technique, event order abstraction (EOA), for parametric safety verification of real-time systems in which ``correct orderings of events'' needed for system correctness are maintained by timing ...

Umeno, Shinya

2008-07-28T23:59:59.000Z

239

Management of real-time streaming data grid services  

Science Conference Proceedings (OSTI)

We discuss the architectural and management support for real time data stream applications, both in terms of lower level messaging and higher level service, filter and session structures. In our approach, messaging systems act as a Grid substrate that ...

Geoffrey Fox; Galip Aydin; Harshawardhan Gadgil; Shrideep Pallickara; Marlon Pierce; Wenjun Wu

2005-11-01T23:59:59.000Z

240

The 8 requirements of real-time stream processing  

Science Conference Proceedings (OSTI)

Applications that require real-time processing of high-volume data steams are pushing the limits of traditional data processing infrastructures. These stream-based applications include market feed processing and electronic trading on Wall Street, network ...

Michael Stonebraker; U?ur Çetintemel; Stan Zdonik

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real-Time Grid Reliability Management PIER Final Project Report  

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

Real-Time Grid Reliability Management PIER Final Project Report Real-Time Grid Reliability Management PIER Final Project Report Title Real-Time Grid Reliability Management PIER Final Project Report Publication Type Report Year of Publication 2008 Authors Eto, Joseph H., Manu Parashar, Bernard C. Lesieutre, and Nancy J. Lewis Pagination 62 Date Published 12/2008 Publisher LBNL City Berkeley Keywords consortium for electric reliability technology solutions (certs), energy analysis and environmental impacts department Abstract The increased need to manage California's electricity grid in real time is a result of the ongoing transition from a system operated by vertically integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management - construction of new transmission lines - has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools.

242

Soft body animation in real-time simulations  

E-Print Network (OSTI)

This thesis presents a novel approach for creating deformable object animations. A deformable object can be represented as a discrete lattice of particles, and transforming those particles defines a new state for the ...

Sullivan, Mark A., III

2011-01-01T23:59:59.000Z

243

Real-time scene simulator for thermal infrared localization  

Science Conference Proceedings (OSTI)

Exploiting the natural thermal infrared radiation of humans is a promising approach for an accurate, comfortable and inexpensive indoor localization system. However, different sources of disturbance make the development challenging. In order to provide ...

Daniel Hauschildt; Jürgen Kemper; Nicolaj Kirchhof; Benedict Juretko; Holger Linde

2010-12-01T23:59:59.000Z

244

Analysis of real-time reservoir monitoring : reservoirs, strategies, & modeling.  

Science Conference Proceedings (OSTI)

The project objective was to detail better ways to assess and exploit intelligent oil and gas field information through improved modeling, sensor technology, and process control to increase ultimate recovery of domestic hydrocarbons. To meet this objective we investigated the use of permanent downhole sensors systems (Smart Wells) whose data is fed real-time into computational reservoir models that are integrated with optimized production control systems. The project utilized a three-pronged approach (1) a value of information analysis to address the economic advantages, (2) reservoir simulation modeling and control optimization to prove the capability, and (3) evaluation of new generation sensor packaging to survive the borehole environment for long periods of time. The Value of Information (VOI) decision tree method was developed and used to assess the economic advantage of using the proposed technology; the VOI demonstrated the increased subsurface resolution through additional sensor data. Our findings show that the VOI studies are a practical means of ascertaining the value associated with a technology, in this case application of sensors to production. The procedure acknowledges the uncertainty in predictions but nevertheless assigns monetary value to the predictions. The best aspect of the procedure is that it builds consensus within interdisciplinary teams The reservoir simulation and modeling aspect of the project was developed to show the capability of exploiting sensor information both for reservoir characterization and to optimize control of the production system. Our findings indicate history matching is improved as more information is added to the objective function, clearly indicating that sensor information can help in reducing the uncertainty associated with reservoir characterization. Additional findings and approaches used are described in detail within the report. The next generation sensors aspect of the project evaluated sensors and packaging survivability issues. Our findings indicate that packaging represents the most significant technical challenge associated with application of sensors in the downhole environment for long periods (5+ years) of time. These issues are described in detail within the report. The impact of successful reservoir monitoring programs and coincident improved reservoir management is measured by the production of additional oil and gas volumes from existing reservoirs, revitalization of nearly depleted reservoirs, possible re-establishment of already abandoned reservoirs, and improved economics for all cases. Smart Well monitoring provides the means to understand how a reservoir process is developing and to provide active reservoir management. At the same time it also provides data for developing high-fidelity simulation models. This work has been a joint effort with Sandia National Laboratories and UT-Austin's Bureau of Economic Geology, Department of Petroleum and Geosystems Engineering, and the Institute of Computational and Engineering Mathematics.

Mani, Seethambal S.; van Bloemen Waanders, Bart Gustaaf; Cooper, Scott Patrick; Jakaboski, Blake Elaine; Normann, Randy Allen; Jennings, Jim (University of Texas at Austin, Austin, TX); Gilbert, Bob (University of Texas at Austin, Austin, TX); Lake, Larry W. (University of Texas at Austin, Austin, TX); Weiss, Chester Joseph; Lorenz, John Clay; Elbring, Gregory Jay; Wheeler, Mary Fanett (University of Texas at Austin, Austin, TX); Thomas, Sunil G. (University of Texas at Austin, Austin, TX); Rightley, Michael J.; Rodriguez, Adolfo (University of Texas at Austin, Austin, TX); Klie, Hector (University of Texas at Austin, Austin, TX); Banchs, Rafael (University of Texas at Austin, Austin, TX); Nunez, Emilio J. (University of Texas at Austin, Austin, TX); Jablonowski, Chris (University of Texas at Austin, Austin, TX)

2006-11-01T23:59:59.000Z

245

Tracking Living Cells as They Differentiate in Real Time  

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

Tracking Living Cells as They Differentiate in Real Time Print Tracking Living Cells as They Differentiate in Real Time Print Protein phosphorylation regulates protein function in a cell, either activating or inactivating the proteins responsible for many cell functions ranging from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death. This chemical process has been studied intensively, but until now it has been impossible to watch phosphorylation at the molecular level without damaging cells or interfering with the very processes being examined. Using ALS Infrared Beamline 1.4.3, a group of researchers led by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology program at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time, without bias.

246

Tracking Living Cells as They Differentiate in Real Time  

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

Tracking Living Cells as They Differentiate in Real Time Print Tracking Living Cells as They Differentiate in Real Time Print Protein phosphorylation regulates protein function in a cell, either activating or inactivating the proteins responsible for many cell functions ranging from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death. This chemical process has been studied intensively, but until now it has been impossible to watch phosphorylation at the molecular level without damaging cells or interfering with the very processes being examined. Using ALS Infrared Beamline 1.4.3, a group of researchers led by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology program at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time, without bias.

247

Tracking Living Cells as They Differentiate in Real Time  

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

Tracking Living Cells as They Differentiate in Real Time Print Tracking Living Cells as They Differentiate in Real Time Print Protein phosphorylation regulates protein function in a cell, either activating or inactivating the proteins responsible for many cell functions ranging from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death. This chemical process has been studied intensively, but until now it has been impossible to watch phosphorylation at the molecular level without damaging cells or interfering with the very processes being examined. Using ALS Infrared Beamline 1.4.3, a group of researchers led by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology program at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time, without bias.

248

Tracking Living Cells as They Differentiate in Real Time  

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

Tracking Living Cells as They Differentiate in Real Time Print Tracking Living Cells as They Differentiate in Real Time Print Protein phosphorylation regulates protein function in a cell, either activating or inactivating the proteins responsible for many cell functions ranging from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death. This chemical process has been studied intensively, but until now it has been impossible to watch phosphorylation at the molecular level without damaging cells or interfering with the very processes being examined. Using ALS Infrared Beamline 1.4.3, a group of researchers led by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology program at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time, without bias.

249

Tracking Living Cells as They Differentiate in Real Time  

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

Tracking Living Cells as They Tracking Living Cells as They Differentiate in Real Time Tracking Living Cells as They Differentiate in Real Time Print Thursday, 27 September 2012 00:00 Protein phosphorylation regulates protein function in a cell, either activating or inactivating the proteins responsible for many cell functions ranging from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death. This chemical process has been studied intensively, but until now it has been impossible to watch phosphorylation at the molecular level without damaging cells or interfering with the very processes being examined. Using ALS Infrared Beamline 1.4.3, a group of researchers led by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology program at the ALS, developed a new technique for monitoring protein phosphorylation inside living mammalian cells, enabling them to follow cellular chemical changes in real time, without bias.

250

Low Dose Radiation Research Program: Research Highlights - Real-time  

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

Real-time imaging of repair processes possible with Nickel-63 Real-time imaging of repair processes possible with Nickel-63 microirradiator Microscope Microscope stage-mounted microirradiation system. (A) Overall system shown mounted on a micromanipulator housed within a heated, humidified, environmental chamber of a microscope. (B) Close-up showing attachment of device to the micromanipulator. (C) Detail showing the bend in the enclosing capillary, which allows positioning of the active surface directly above the target cell. (D) Microirradiator tip in dissecting microscope. (E) Close-up view through microscope optics (scale bar, 10 microns.) Background: Scientists know that mammalian cells begin a nucleoplasmic repair process within seconds after being exposed to ionizing radiation. Real-time imaging of this process could further understanding of the

251

Flash Memory Garbage Collection in Hard Real-Time Systems  

E-Print Network (OSTI)

Due to advances in capacity, speed, and economics, NAND-based flash memory technology is increasingly integrated into all types of computing systems, ranging from enterprise servers to embedded devices. However, due to its unpredictable up-date behavior and time consuming garbage collection mechanism, NAND-based flash memory is difficult to integrate into hard-real-time embedded systems. In this thesis, I propose a performance model for flash memory garbage collection that can be used in conjunction with a number of different garbage collection strategies. I describe how to model the cost of reactive (lazy) garbage collection and compare it to that of more proactive schemes. I develop formulas to assess the schedulability of hard real- time periodic task sets under simplified memory consumption models. Results show that I prove the proactive schemes achieve the larger maximum schedulable utilization than the traditional garbage collection mechanism for hard real-time systems in flash memory.

Lai, Chien-An

2011-08-01T23:59:59.000Z

252

Java Automation Controller and Real-Time Systems  

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

Java Automation Controller and Real-Time Systems Java Automation Controller and Real-Time Systems Speaker(s): Greg Bollella Date: June 29, 2009 - 12:00pm Location: 90-3122 Java has always been a disruptive technology and now it is breaking the mold in industrial, process, building, and transportation automation systems. For many years, programmable logic controllers (PLCs), the digital versions of old relay-based control systems (such as that used in the NYC Subway system in the late 1800s) have primarily controlled these systems. PLCs are the workhorses of the controls industry but the market is characterized by proprietary, closed, expensive, special-purpose solutions. A Java-based automation controller breaks the mold by allowing control algorithms, which require strict real-time capabilities, to run on

253

Development of a dynamic simulator for a natural gas combined cycle (NGCC) power plant with post-combustion carbon capture  

Science Conference Proceedings (OSTI)

The AVESTAR Center located at the U.S. Department of Energy’s National Energy Technology Laboratory and West Virginia University is a world-class research and training environment dedicated to using dynamic process simulation as a tool for advancing the safe, efficient and reliable operation of clean energy plants with CO{sub 2} capture. The AVESTAR Center was launched with a high-fidelity dynamic simulator for an Integrated Gasification Combined Cycle (IGCC) power plant with pre-combustion carbon capture. The IGCC dynamic simulator offers full-scope Operator Training Simulator (OTS) Human Machine Interface (HMI) graphics for realistic, real-time control room operation and is integrated with a 3D virtual Immersive Training Simulator (ITS), thus allowing joint control room and field operator training. The IGCC OTS/ITS solution combines a “gasification with CO{sub 2} capture” process simulator with a “combined cycle” power simulator into a single high-performance dynamic simulation framework. This presentation will describe progress on the development of a natural gas combined cycle (NGCC) dynamic simulator based on the syngas-fired combined cycle portion of AVESTAR’s IGCC dynamic simulator. The 574 MW gross NGCC power plant design consisting of two advanced F-class gas turbines, two heat recovery steam generators (HRSGs), and a steam turbine in a multi-shaft 2x2x1 configuration will be reviewed. Plans for integrating a post-combustion carbon capture system will also be discussed.

Liese, E.; Zitney, S.

2012-01-01T23:59:59.000Z

254

Real Time Flame Monitoring of Gasifier Burner and Injectors  

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

Real Time Flame Monitoring of Gasifier Real Time Flame Monitoring of Gasifier Burner and Injectors Background The Gasification Technologies Program at the National Energy Technology Laboratory (NETL) supports research and development (R&D) in the area of gasification-a process whereby carbon-based materials (feedstocks) such as coal are converted into synthesis gas (syngas), which is separated into hydrogen (H 2 ) and carbon dioxide (CO 2 ) gas streams in a combustion turbine-generator as a way to generate clean electricity while

255

Integration of Real-Time Data Into Building Automation Systems  

SciTech Connect

The project goal was to investigate the possibility of using predictive real-time information from the Internet as an input to building management system algorithms. The objectives were to identify the types of information most valuable to commercial and residential building owners, managers, and system designers. To comprehensively investigate and document currently available electronic real-time information suitable for use in building management systems. Verify the reliability of the information and recommend accreditation methods for data and providers. Assess methodologies to automatically retrieve and utilize the information. Characterize equipment required to implement automated integration. Demonstrate the feasibility and benefits of using the information in building management systems. Identify evolutionary control strategies.

Mark J. Stunder; Perry Sebastian; Brenda A. Chube; Michael D. Koontz

2003-04-16T23:59:59.000Z

256

Handheld portable real-time tracking and communications device  

DOE Patents (OSTI)

Portable handheld real-time tracking and communications devices include; a controller module, communications module including global positioning and mesh network radio module, data transfer and storage module, and a user interface module enclosed in a water-resistant enclosure. Real-time tracking and communications devices can be used by protective force, security and first responder personnel to provide situational awareness allowing for enhance coordination and effectiveness in rapid response situations. Such devices communicate to other authorized devices via mobile ad-hoc wireless networks, and do not require fixed infrastructure for their operation.

Wiseman, James M. (Albuquerque, NM); Riblett, Jr., Loren E. (Edgewood, NM); Green, Karl L. (Albuquerque, NM); Hunter, John A. (Albuquerque, NM); Cook, III, Robert N. (Rio Rancho, NM); Stevens, James R. (Arlington, VA)

2012-05-22T23:59:59.000Z

257

Phonostat: Thermostatting phonons in molecular dynamics simulations  

E-Print Network (OSTI)

Thermostat algorithms in a molecular dynamics simulation maintain an average temperature of a system by regulating the atomic velocities rather than the internal degrees of freedom. Herein, we present a “phonostat” algorithm ...

Raghunathan, Rajamani

258

LAMMPS Molecular Dynamics Simulator - TMS  

Science Conference Proceedings (OSTI)

Nov 8, 2007 ... LAMMPS stands for Large-scale Atomic/Molecular Massively Parallel Simulator. LAMMPS has potentials for soft materials (biomolecules, ...

259

Method and apparatus for real time imaging and monitoring of radiotherapy beams  

Science Conference Proceedings (OSTI)

A method and apparatus for real time imaging and monitoring of radiation therapy beams is designed to preferentially distinguish and image low energy radiation from high energy secondary radiation emitted from a target as the result of therapeutic beam deposition. A detector having low sensitivity to high energy photons combined with a collimator designed to dynamically image in the region of the therapeutic beam target is used.

Majewski, Stanislaw (Yorktown, VA); Proffitt, James (Newport News, VA); Macey, Daniel J. (Birmingham, AL); Weisenberger, Andrew G. (Yorktown, VA)

2011-11-01T23:59:59.000Z

260

Evaluation of Concurrency Control Strategies for Mixed Soft Real-Time Database Systems  

E-Print Network (OSTI)

1 Evaluation of Concurrency Control Strategies for Mixed Soft Real-Time Database Systems Kam of the miss rate of soft real-time transactions. Although many new database applications have significant soft real-time database systems (MSRTDBS), in which both non-real-time and soft real-time transactions

Cheng, Reynold Cheng Chun

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Constraint Orientated Specification with CSP and Real Time Temporal Logic  

E-Print Network (OSTI)

Constraint Orientated Specification with CSP and Real Time Temporal Logic Justin Pearson Department Processes (CSP) [Hoa85] and a version of Propositional Temporal Logic (PTL), derived from [Eme90]. CSP. The behaviour of a CSP process is dependent on its environment; it is therefore difficult to assert global

Kent, University of

262

Concurrent and Real Time Systems: the CSP approach Steve Schneider  

E-Print Network (OSTI)

Concurrent and Real Time Systems: the CSP approach by Steve Schneider First published 1999 Systems the CSP approach Steve Schneider A Wiley-Interscience Publication JOHN WILEY & SONS, INC. New York Whitehead This book provides an introduction to Communicating Sequential Processes (CSP) and its use

Doran, Simon J.

263

Active learning for real-time motion controllers  

Science Conference Proceedings (OSTI)

This paper describes an approach to building real-time highly-controllable characters. A kinematic character controller is built on-the-fly during a capture session, and updated after each new motion clip is acquired. Active learning is used to identify ... Keywords: active learning, human motion, motion capture

Seth Cooper; Aaron Hertzmann; Zoran Popovi?

2007-08-01T23:59:59.000Z

264

ADWICE – anomaly detection with real-time incremental clustering  

Science Conference Proceedings (OSTI)

Anomaly detection, detection of deviations from what is considered normal, is an important complement to misuse detection based on attack signatures. Anomaly detection in real-time places hard requirements on the algorithms used, making many proposed ... Keywords: adaptability, anomaly detection, clustering, intrusion detection, realtime

Kalle Burbeck; Simin Nadjm-Tehrani

2004-12-01T23:59:59.000Z

265

Real-Time Optimization Strategies for Building Systems  

E-Print Network (OSTI)

Our analysis indicates that it is possible to obtain energy savings of more than ... This information can be used to compute economic-optimal set-point ... This ability is key in reducing the exposure of buildings to real-time market volatility and.

266

Real-time pricing program in a smart grid environment  

Science Conference Proceedings (OSTI)

Improving system efficiency and reliability is motivating countries to design and execute different types of time of use demand response programs. However, certain deficiencies prevent these programs from reaching their goals. Smart meters as a mechanism ... Keywords: real-time pricing, smart grid, time of use programs

Hassan Monsef, Bin Wu

2013-04-01T23:59:59.000Z

267

Real-Time Forecasting of Snowfall Using a Neural Network  

Science Conference Proceedings (OSTI)

A set of 53 snowfall reports was collected in real time from the 2004/05 and 2005/06 cold seasons (November–March). Three snowfall-amount forecast methods were tested: neural network, surface-temperature-based 676-USDT table, and climatological ...

Paul J. Roebber; Melissa R. Butt; Sarah J. Reinke; Thomas J. Grafenauer

2007-06-01T23:59:59.000Z

268

Real-time locomotion control by sensing gloves: Research Articles  

Science Conference Proceedings (OSTI)

Sensing gloves are often used as an input device for virtual 3D games. We propose a new method to control characters such as humans or animals in real-time by using sensing gloves. Based on existing motion data of the body, a new method to map the hand ... Keywords: 3D game, 3D user interface, Computer puppetry, Sensing glove

Taku Komura; Wai-Chun Lam

2006-12-01T23:59:59.000Z

269

Optimal Real-time Dispatch for Integrated Energy Systems  

E-Print Network (OSTI)

and HVAC operations. A real-time optimization program suchHVAC IES ISO-NE LBNL MILP NOx NP NRC NREL OLS P&DC PJM PUCT PURPA PV RETScreen RReDC Hybrid OptimizationHVAC equipment and other building energy equipment. This research is similar to the IES dispatch optimization

Firestone, Ryan Michael

2007-01-01T23:59:59.000Z

270

CGLive - A Real Time Power Monitoring Solution for Enterprises  

Science Conference Proceedings (OSTI)

CGLive is a real time energy monitoring software tool that could be used to monitor and reduce energy consumption of PC's in a enterprise network environment. Working of CGLive has been tested in a lab environment and was found to be successful. Dashboard ... Keywords: Green IT, Intelligent Green IT Management, Energy audit, M2M technology, Sensor Networks, Performance Optimization, Remote monitoring

Subrahmanya VRK Rao; S. Ramesh; V. Arun Muthuraj; Karthik Sundararaman; Jinka Parthasarathi

2011-08-01T23:59:59.000Z

271

Evaluating transport coefficients in real time thermal field theory  

E-Print Network (OSTI)

Transport coefficients in a hadronic gas have been calculated earlier in the imaginary time formulation of thermal field theory. The steps involved are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we carry out both the steps in the real time formulation.

S. Mallik; Sourav Sarkar

2012-11-12T23:59:59.000Z

272

A real-time virtual machine implementation for small microcontrollers  

Science Conference Proceedings (OSTI)

A way to host a full general purpose virtual machine (VM) interpreter on a very small microcontroller platform is described. This machine provides a comprehensive set of general and enhanced functionality efficiently by abstracting the VM instruction ... Keywords: Microcontrollers, Real-time systems, Virtual machine

W. Roger Davis; Phillip A. Laplante; Bo I. Sandén

2012-09-01T23:59:59.000Z

273

Technical Note Real-time functional brain mapping using electrocorticography  

E-Print Network (OSTI)

et al., 1994; Keles et al., 2004). In contrast, methods that read endogenous signals, such as somato) 504­507 #12;the 80­200 Hz band (Grenier et al., 2001). This real-time mapping technique should. J. Neurophysiol. 94, 4269­4280. Grenier, F., Timofeev, I., Steriade, M., 2001. Focal synchronization

Rao, Rajesh

274

Real-time concepts for block-based watermarking schemes  

Science Conference Proceedings (OSTI)

In this paper we propose a concept to transfer a non real-time watermarking system into a watermarking system, which meets the requirements of a media-on-demand system. Several applications scenarios requiring the embedding of watermarks with maximum ...

Michael Arnold; Oliver Lobisch

2002-12-01T23:59:59.000Z

275

Scalable real time data management for smart grid  

Science Conference Proceedings (OSTI)

This paper presents GridMW, a scalable and reliable data middleware layer for smart grids. Smart grids promise to improve the efficiency of power grid systems and reduce green house emissions through incorporating power generation from renewable sources ... Keywords: data management middleware, efficiency, near real time, performance, smart grids

Jian Yin; Anand Kulkarni; Sumit Purohit; Ian Gorton; Bora Akyol

2011-12-01T23:59:59.000Z

276

Real-time personalized sports video filtering and summarization  

Science Conference Proceedings (OSTI)

We demonstrate a real-time fully automated software system for filtering important events in sports video. Events represent occurrences of actions or state changes in video content. In the current prototype, we demonstrate detection of pitching in baseball ... Keywords: MPEG-7, event detection, indexing, summarization, video filtering

Di Zhong; Raj Kumar; Shih-Fu Chang

2001-10-01T23:59:59.000Z

277

Real-time SPECT and 2D ultrasound image registration  

Science Conference Proceedings (OSTI)

In this paper we present a technique for fully automatic, real-time 3D SPECT (Single Photon Emitting Computed Tomography) and 2D ultrasound image registration. We use this technique in the context of kidney lesion diagnosis. Our registration algorithm ...

Marek Bucki; Fabrice Chassat; Francisco Galdames; Takeshi Asahi; Daniel Pizarro; Gabriel Lobo

2007-10-01T23:59:59.000Z

278

Statistical Characteristics of a Real-Time Precipitation Forecasting Model  

Science Conference Proceedings (OSTI)

At Colorado State University the Regional Atmospheric Modeling System (RAMS) has been used to produce real-time forecasts of precipitation for the Colorado mountain region since 1991. Originally a so-called dump-bucket scheme was used to generate ...

Brian Gaudet; William R. Cotton

1998-12-01T23:59:59.000Z

279

A real-time, multimodal, and dimensional affect recognition system  

Science Conference Proceedings (OSTI)

This study focuses on the development of a real-time automatic affect recognition system. It adapts a multimodal approach, where affect information taken from two modalities are combined to arrive at an emotion label that is represented in a valence-arousal ... Keywords: dimensional labels, emotion models, multimodal, regression

Nicole Nielsen Lee; Jocelynn Cu; Merlin Teodosia Suarez

2012-09-01T23:59:59.000Z

280

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH  

E-Print Network (OSTI)

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH PERFORMANCE GUARANTEE LIAN LU, JINLONG TU, CHI-KIN CHAU, MINGHUA CHEN, ZHAO XU AND XIAOJUN LIN INTRODUCTION Microgrid is an emerging- generation improves generation efficiency by 2-3x. A key problem in microgrid operations is how to schedule

Zhang, Junshan

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Slicing concurrent real-time system specifications for verification  

Science Conference Proceedings (OSTI)

The high-level specification language CSP-OZ-DC has been shown to be well-suited for modelling and analysing industrially relevant concurrent real-time systems. It allows us to model each of the most important functional aspects such as control flow, ...

Ingo Brückner

2007-07-01T23:59:59.000Z

282

REAL-TIME TRACER MONITORING OF RESERVOIR STIMULATION PROCEDURES  

SciTech Connect

Ongoing Phase 2 work comprises the development and field-testing of a real-time reservoir stimulation diagnostic system. Phase 3 work commenced in June 2001, and involved conducting research, development and field-testing of real-time enhanced dual-fluid stimulation processes. Experimental field-testing to date includes three well tests. Application of these real-time stimulation processes and diagnostic technologies has been technically successful with commercial production from the ''marginal'' reservoirs in the first two well tests. The third well test proved downhole-mixing is an efficient process for acid stimulation of a carbonate reservoir that produced oil and gas with 2200 psi bottomhole reservoir pressure, however, subsequent shut-in pressure testing indicated the reservoir was characterized by low-permeability. Realtimezone continues to seek patent protection in foreign markets to the benefit of both RTZ and NETL. Realtimezone and the NETL have licensed the United States patented to Halliburton Energy Services (HES). Ongoing Phase 2 and Phase 3 field-testing continues to confirm applications of both real-time technologies, from well testing conducted over the last 12-month work period and including well test scheduled for year-end of 2002. Technical data transfer to industry is ongoing via Internet tech-transfer, public presentations and industry publications. Final Phase 3 test work will be focused on further field-testing the innovational process of blending stimulation fluids downhole. This system provides a number of advantages in comparison to older industry fracturing techniques and allows the operator to control reservoir fracture propagation and concentrations of proppant placed in the reservoir, in real-time. Another observed advantage is that lower friction pressures result, which results in lower pump treating pressures and safer reservoir hydraulic fracturing jobs.

George Scott III

2002-08-01T23:59:59.000Z

283

Real-Time Traffic Information for Emergency Evacuations  

Science Conference Proceedings (OSTI)

There are many instances in which it is possible to plan ahead for an emergency evacuation (e.g., a chemical processing facility explosion). For those cases, if an accident were to happen, then the best evacuation plan for the prevailing network and weather conditions would be deployed. In other cases (e.g., the derailment of a train transporting hazardous materials), there may not be any previously developed plan to be implemented, and decisions must be made ad-hoc on how to proceed with an emergency evacuation. In both situations, the availability of real-time traffic information plays a critical role in the management of the evacuation operations. Due to cost constraints, only large urban areas have traffic sensor deployments that permit access to some sort of real-time traffic information; an evacuation taking place in other areas of the country would have to proceed without real-time traffic information. In order to improve operations during a vehicular emergency evacuation anywhere, a system of sensors that uses newly developed real-time traffic-information-gathering technologies to assess traffic conditions and to detect incidents on the main evacuation routes is presented in this paper. A series of tests, both in a controlled environment and in the field, were conducted to study the feasibility of such a system of traffic sensors and to assess its ability to provide real-time traffic information during an emergency evacuation. The results of these tests indicated that the prototype sensors are reliable and accurate for the type of application that is the focus of this paper.

Franzese, Oscar [ORNL; Zhang, Li [Mississippi State University (MSU); Mahmoud, Anas M. [Mississippi State University (MSU)

2010-01-01T23:59:59.000Z

284

Dynamics Simulation in a Wave Environment  

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

Coupled Dynamic Simulation in a Wave Coupled Dynamic Simulation in a Wave Environment (Navatek, AEGIR, and WECs) Marine and Hydrokinetics Instrumentation Workshop 9 July 2012 David Kring, Navatek Ltd. Presentation Overview * Introduction to Navatek * AEGIR brief: resistance, seakeeping, global and local loads a 3D, NURBS-based, high-order, Rankine boundary element method ... from same lab as at MIT as WAMIT and SWAN, with pFFT acceleration coupling with controls, structures, aerodynamics, power take-offs * Some WEC applications at Navatek 2 Honolulu, Hawaii, USA Company Background A "Research Shipyard" based in Honolulu, HI Combining simulation-based design with prototype construction

285

RTZen: Highly Predictable, Real-time Java Middleware for Distributed and Embedded Systems  

E-Print Network (OSTI)

Real-Time Speci?cation for Java. Addison-Wesley (2000) 8.Vitek, J. : Real-time java scoped memory: Design patternsof the jRate Real-Time Java Implementation. In Meersman,

Raman, Krishna; Zhang, Yue; Panahi, Mark; Colmenares, Juan A; Klefstad, Raymond; Harmon, Trevor

2005-01-01T23:59:59.000Z

286

Is Real-Time Pricing Green?: The Environmental Impacts of Electricity Demand Variance  

E-Print Network (OSTI)

for responding to real-time prices. 3 Recently someof RTP. the higher real-time price, each would use lessretail price, p . For real-time prices below the ?at price,

Holland, Stephen P.; Mansur, Erin T.

2004-01-01T23:59:59.000Z

287

Residential Customer Response to Real-time Pricing: The Anaheim Critical Peak Pricing Experiment  

E-Print Network (OSTI)

to reduce the day-ahead or real-time price in the Californiaon day- ahead and real-time prices, particularly duringday-ahead and real-time wholesale prices. Declaring a CPP

Wolak, Frank A.

2007-01-01T23:59:59.000Z

288

Wealth Transfers Among Large Customers from Implementing Real-Time Retail Electricity Pricing  

E-Print Network (OSTI)

who are charged real-time prices. I discuss the politicalor loss relative to the real-time price that obtains in eachits expected demand at the real-time price. Throughout this

Borenstein, Severin

2007-01-01T23:59:59.000Z

289

Customer Risk from Real-Time Retail Electricity Pricing: Bill Volatility and Hedgability  

E-Print Network (OSTI)

then pay/receive the real- time price for deviations fromI assume that the retail real-time prices customers face arewould likely dampen real-time price volatility and the

Borenstein, Severin

2007-01-01T23:59:59.000Z

290

Detection and quantitation of HPV in genital and oral tissues and fluids by real time PCR  

E-Print Network (OSTI)

oral tissues and fluids by real time PCR. Virology Journalsamples by a real-time PCR- based system. J Virol MethodsMolecular beacon-based real-time PCR method for detection of

2010-01-01T23:59:59.000Z

291

Real-time garbage collection for flash-memory storage systems of real-time embedded systems  

Science Conference Proceedings (OSTI)

Flash-memory technology is becoming critical in building embedded systems applications because of its shock-resistant, power economic, and nonvolatile nature. With the recent technology breakthroughs in both capacity and reliability, flash-memory storage ... Keywords: Embedded systems, flash memory, garbage collection, real-time system, storage systems

Li-Pin Chang; Tei-Wei Kuo; Shi-Wu Lo

2004-11-01T23:59:59.000Z

292

Real-time Molecular Study of Bystander Effects of Low dose Low LET radiation Using Living Cell Imaging and Nanoparticale Optics  

SciTech Connect

In this study two novel approaches are proposed to investigate precisely the low dose low LET radiation damage and its effect on bystander cells in real time. First, a flow shear model system, which would provide us a near in vivo situation where endothelial cells in the presence of extra cellular matrix experiencing continuous flow shear stress, will be used. Endothelial cells on matri-gel (simulated extra cellular matrix) will be subjected to physiological flow shear (that occurs in normal blood vessels). Second, a unique tool (Single nano particle/single live cell/single molecule microscopy and spectroscopy; Figure A) will be used to track the molecular trafficking by single live cell imaging. Single molecule chemical microscopy allows one to single out and study rare events that otherwise might be lost in assembled average measurement, and monitor many target single molecules simultaneously in real-time. Multi color single novel metal nanoparticle probes allow one to prepare multicolor probes (Figure B) to monitor many single components (events) simultaneously and perform multi-complex analysis in real-time. These nano-particles resist to photo bleaching and hence serve as probes for unlimited timeframe of analysis. Single live cell microscopy allows one to image many single cells simultaneously in real-time. With the combination of these unique tools, we will be able to study under near-physiological conditions the cellular and sub-cellular responses (even subtle changes at one molecule level) to low and very low doses of low LET radiation in real time (milli-second or nano-second) at sub-10 nanometer spatial resolution. This would allow us to precisely identify, at least in part, the molecular mediators that are responsible of radiation damage in the irradiated cells and the mediators that are responsible for initiating the signaling in the neighboring cells. Endothelial cells subjected to flow shear (2 dynes/cm2 or 16 dynes/cm2) and exposed to 0.1, 1 and 10 cGy on coverslips will be examined for (a) low LET radiation-induced alterations of cellular function and its physiological relevance in real time; and (b) radiation damage triggered bystander effect on the neighboring unirradiated cells. First, to determine the low LET radiation induced alteration of cellular function we will examine: (i) the real time transformation of single membrane transporters in single living cells; (ii) the pump efficiency of membrane efflux pump of live cells in real time at the molecular level; (iii) the kinetics of single-ligand receptor interaction on single live cell surface (Figure C); and (iv) alteration in chromosome replication in living cell. Second, to study the radiation triggered bystander responses, we will examine one of the key signaling pathway i.e. TNF- alpha/NF-kappa B mediated signaling. TNF-alpha specific nano particle sensors (green) will be developed to detect the releasing dynamics, transport mechanisms and ligand-receptor binding on live cell surface in real time. A second sensor (blue) will be developed to simultaneously monitor the track of NF-kB inside the cell. The proposed nano-particle optics approach would complement our DOE funded study on biochemical mechanisms of TNF-alpha- NF-kappa B-mediated bystander effect.

Natarajan, Mohan [UT Health Science Center at San Antonio; Xu, Nancy R [Old Dominion University; Mohan, Sumathy [UT Health Science Center at San Antonio

2013-06-03T23:59:59.000Z

293

A Real-Time Database QoS-aware Service Selection Protocol for MANET  

E-Print Network (OSTI)

The real-time database service selection depends typically to the system stability in order to handle the time-constrained transactions within their deadline. However, applying the real-time database system in the mobile ad hoc networks requires considering the mobile nodes limited capacities. In this paper, we propose cross-layer service selection which combines performance metrics measured in the real-time database system to those used by the routing protocol in order to make the best selection decision. It ensures both timeliness and energy efficiency by avoiding low-power and busy service provider node. A multicast packet is used in order to reduce the transmission cost and network load when sending the same packet to multiple service providers. In this paper, we evaluate the performance of our proposed protocol. Simulation results, using the Network Simulator NS2, improve that the protocol decreases the deadline miss ratio of packets, increases the service availability and reduces the service response ti...

Rekik, Jihen Drira; Ghezala, Henda Ben

2011-01-01T23:59:59.000Z

294

Broadband spectroscopic sensor for real-time monitoring of industrial SO{sub 2} emissions  

SciTech Connect

A spectroscopic system for continuous real-time monitoring of SO{sub 2}, concentrations in industrial emissions was developed. The sensor is well suited for field applications due to simple and compact instrumental design, and robust data evaluation based on ultraviolet broadband absorption without the use of any calibration cell. The sensor has a detection limit of 1 ppm, and was employed both for gas-flow simulations with and without suspended particles, and for in situ measurement of SO{sub 2} concentrations in the flue gas emitted from an industrial coal-fired boiler. The price/performance ratio of the instrument is expected to be superior to other comparable real-time monitoring systems.

Xu, F.; Zhang, Y.G.; Somesfalean, G.; Wang, H.S.; Wu, S.H.; Zhang, Z.G. [Harbin Institute of Technology, Harbin (China). Dept, of Physics

2007-05-15T23:59:59.000Z

295

Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications  

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

Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications to Atmospheric Organic Surfaces Speaker(s): Yael Dubowski Date: December 10, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Hugo Destaillats Most studies of heterogeneous reactions on aerosols have focused on their implications for gas phase species. Less attention, however, has been given to the modification of aerosol surfaces during such reactions. Alteration of aerosol surface species may affect their hygroscopic and radiative properties as well as their reactivity toward other atmospheric trace species. In the present study, we use self-assembled organic monolayers (SAM) as proxies for atmospheric organic aerosols. Detection of even very short carbon chains (i.e., C3) as well as continuous monitoring of the SAMs

296

REAL TIME GRID RELIABILITY MANAGEMENT 2005 PIER FINAL PROJECT REPORT  

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

REAL TIME GRID RELIABILITY REAL TIME GRID RELIABILITY MANAGEMENT 2005 Prepared For: California Energy Commission Public Interest Energy Research Program Prepared By: Lawrence Berkeley National Laboratory PIER FINAL PROJECT REPORT LBNL-62368 ii Legal Notice This report was prepared as a result of work sponsored by the California Energy Commission (Energy Commission). It does not necessarily represent the views of the Energy Commission, its employees, or the State of California. The Energy Commission, the State of California, its employees, contractors, and subcontractors make no warrant, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the use of this information will not infringe upon privately owned rights. This report has not been

297

Real-Time Raman Gas Composition Sensor.pdf  

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

Sensor Sensor Opportunity Technology/Capability Overview Benefits to Partner Development Status Contact The NETL Real-time Raman Gas Composition Analyzer determines the composition of a flowing gaseous sample in real-time and provides the concentration of each gas in that sample. . . . ‡ Testing partners would have the opportunity to evaluate the performance of the prototype system, implement new feed-forward controls, and may help shape the commercial product configuration ‡ This sensor will greatly benefit the power industry, as well as other industries utilizing gaseous input or output streams by enabling smarter control to increase process efficiency and reduce emissions ‡ We are seeking opportunities to field test the prototype instruments in power and industrial applications, as well

298

Wide-area, real-time monitoring and visualization system  

SciTech Connect

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S. (Los Angeles, CA); Dyer, James D. (La Mirada, CA); Martinez Morales, Carlos A. (Upland, CA)

2011-11-15T23:59:59.000Z

299

Real-time performance monitoring and management system  

SciTech Connect

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S. (Los Angeles, CA); Dyer, James D. (La Mirada, CA); Martinez Morales, Carlos A. (Upland, CA)

2007-06-19T23:59:59.000Z

300

Wide-area, real-time monitoring and visualization system  

DOE Patents (OSTI)

A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a monitor computer for monitoring at least one of reliability metrics, generation metrics, transmission metrics, suppliers metrics, grid infrastructure security metrics, and markets metrics for the electric power grid. The data for metrics being monitored by the monitor computer are stored in a data base, and a visualization of the metrics is displayed on at least one display computer having a monitor. The at least one display computer in one said control area enables an operator to monitor the grid portion corresponding to a different said control area.

Budhraja, Vikram S.; Dyer, James D.; Martinez Morales, Carlos A.

2013-03-19T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real time markerless motion tracking using linked kinematic chains  

DOE Patents (OSTI)

A markerless method is described for tracking the motion of subjects in a three dimensional environment using a model based on linked kinematic chains. The invention is suitable for tracking robotic, animal or human subjects in real-time using a single computer with inexpensive video equipment, and does not require the use of markers or specialized clothing. A simple model of rigid linked segments is constructed of the subject and tracked using three dimensional volumetric data collected by a multiple camera video imaging system. A physics based method is then used to compute forces to align the model with subsequent volumetric data sets in real-time. The method is able to handle occlusion of segments and accommodates joint limits, velocity constraints, and collision constraints and provides for error recovery. The method further provides for elimination of singularities in Jacobian based calculations, which has been problematic in alternative methods.

Luck, Jason P. (Arvada, CO); Small, Daniel E. (Albuquerque, NM)

2007-08-14T23:59:59.000Z

302

Refinement and Verification of Real-Time Systems  

E-Print Network (OSTI)

This paper discusses highly general mechanisms for specifying the refinement of a real-time system as a collection of lower level parallel components that preserve the timing and functional requirements of the upper level specification. These mechanisms are discussed in the context of ASTRAL, which is a formal specification language for real-time systems. Refinement is accomplished by mapping all of the elements of an upper level specification into lower level elements that may be split among several parallel components. In addition, actions that can occur in the upper level are mapped to actions of components operating at the lower level. This allows several types of implementation strategies to be specified in a natural way, while the price for generality (in terms of complexity) is paid only when necessary. The refinement mechanisms are first illustrated using a simple digital circuit; then, through a highly complex phone system; finally, design guidelines gleaned from these specifications are presented.

Kolano, Paul Z; Kemmerer, Richard A; Mandrioli, Dino

2010-01-01T23:59:59.000Z

303

Slicing Concurrent Real-Time System Specifications for Verification  

E-Print Network (OSTI)

The high-level specification language CSP-OZ-DC has been shown to be well-suited for modelling and analysing industrially relevant concurrent real-time systems. It allows us to model each of the most important functional aspects such as control flow, data, and real-time requirements in adequate notations, maintaining a common semantic foundation for subsequent verification. Slicing on the other hand has become an established technique to complement the fight against state space explosion during verification which inherently accompanies increasing system complexity. In this paper, we exploit the special structure of CSP-OZ-DC specifications by extending the dependence graph—which usually serves as a basis for slicing—with several new types of dependencies, including timing dependencies derived from the specification’s DC part. Based on this we show how to compute a specification slice and prove correctness of our approach.

Ingo Brückner

2007-01-01T23:59:59.000Z

304

Program on Technology Innovation: Real Time NDE for Welding  

Science Conference Proceedings (OSTI)

This report describes real-time nondestructive evaluation (NDE) for welding and provides an update on the NDE methods being investigated and developed for flaw detection during welding and the corresponding technical results. It also provides a summary of the future proposed work.BackgroundIt has been recognized that efficient, high-quality welding processes are essential to the economical development and safety of new advanced and operational nuclear ...

2012-12-12T23:59:59.000Z

305

Real-time pricing -- supplanted by Price-risk derivatives?  

Science Conference Proceedings (OSTI)

Future trends in pricing options for wholesale electrical generation are discussed. Specifically, the effect of price derivatives on electricity consumption are examined. Economic analyses are presented for customer demand in real-time pricing scenarios with and without a price derivative hedge. It is determined that consumption will be curtailed even when price caps have been purchased. Consumption behavior is also analyzed to determine the effect of different price caps; regardless of price, consumption is curtailed in response to price.

O`Sheasy, M.

1997-03-01T23:59:59.000Z

306

Real time loss detection for SNM in process  

Science Conference Proceedings (OSTI)

This paper discusses the basis of a design for real time special nuclear material (SNM) loss detectors. The design utilizes process measurements and signal processing techniques to produce a timely estimate of material loss. A state estimator is employed as the primary signal processing algorithm. Material loss is indicated by changes in the states or process innovations (residuals). The design philosophy is discussed in the context of these changes.

Candy, J.V.; Dunn, D.R.; Gavel, D.T.

1980-03-20T23:59:59.000Z

307

Experimental verification of a real-time compensation functionality for dose changes due to target motion in scanned particle therapy  

SciTech Connect

Purpose: Implementation and experimental assessment of a real-time dose compensation system for beam tracking in scanned carbon beam therapy of intrafractionally moving targets. Methods: A real-time dose compensation functionality has been developed and implemented at the experimental branch of the beam tracking system at GSI Helmholtzzentrum fuer Schwerionenforschung (GSI). Treatment plans for different target geometries have been optimized. They have been delivered using scanned carbon ions with beam tracking (BT) and real-time dose compensation combined with beam tracking (RDBT), respectively. Target motion was introduced by a rotating table. Dose distributions were assessed by ionization chamber measurements and dose reconstructions. These distributions have been compared to stationary delivery for BT as well as RDBT. Additionally simulations have been performed to investigate the dependence of delivered dose distributions on varying motion starting phases for BT and RDBT, respectively. Results: Average measured dose differences between static delivery and motion influenced delivery could be reduced from 27-68 mGy when BT was used to 12-37 mGy when RDBT was used. Nominal dose was 1000 mGy. Simulated dose deliveries showed improvements in dose delivery and robustness against varying starting motion phases when RDBT was used. Conclusions: A real-time dose compensation functionality extending the existing beam tracking functionality has been implemented and verified by measurements. Measurements and simulated dose deliveries show that real-time dose compensation can substantially improve delivered dose distributions for large rotational target motion compared to beam tracking alone.

Luechtenborg, Robert; Saito, Nami; Durante, Marco; Bert, Christoph [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany Technische Universitaet Darmstadt, Institut fuer Festkoerperphysik, Hochschulstrasse 6-8, 64289 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany Technische Universitaet Darmstadt, Institut fuer Festkoerperphysik, Hochschulstrasse 6-8, 64289 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt (Germany)

2011-10-15T23:59:59.000Z

308

Looking at Transistor Gate Oxide Formation in Real Time  

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

Looking at Transistor Gate Oxide Formation in Real Time Print Looking at Transistor Gate Oxide Formation in Real Time Print The oxide gate layer is critical to every transistor, and present-day layer thicknesses are in the 10-20 Å range (1-2 nm). However, little information exists on the oxidation process at this thickness. Available results are either for thicker layers grown under high-pressure conditions or for only the first couple of monolayers studied under high-vacuum conditions. Now, for the first time, a group of researchers has obtained real-time oxidation results for this elusive range. Using the ambient-pressure x-ray photoelectron spectroscopy (APXPS) endstation at ALS Beamline 9.3.2, they examined oxidation of Si(100) at pressures up to 1 torr and temperatures up to 450 ºC. The Si 2p chemical shifts allowed determination of oxide thickness as a function of time with a precision of 1-2 Å. The initial oxidation rate was very high (up to ~234 Å/h). Then, after an initial oxide thickness of 6-22 Å was formed, the rate decreased markedly (~1.5-4.0Å/h). Neither rate regime can be explained by the standard Deal-Grove (D-G) model for Si oxidation. These results are a significant step toward developing a better understanding of this critical thickness regime.

309

Looking at Transistor Gate Oxide Formation in Real Time  

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

Looking at Transistor Gate Oxide Formation in Real Time Print Looking at Transistor Gate Oxide Formation in Real Time Print The oxide gate layer is critical to every transistor, and present-day layer thicknesses are in the 10-20 Å range (1-2 nm). However, little information exists on the oxidation process at this thickness. Available results are either for thicker layers grown under high-pressure conditions or for only the first couple of monolayers studied under high-vacuum conditions. Now, for the first time, a group of researchers has obtained real-time oxidation results for this elusive range. Using the ambient-pressure x-ray photoelectron spectroscopy (APXPS) endstation at ALS Beamline 9.3.2, they examined oxidation of Si(100) at pressures up to 1 torr and temperatures up to 450 ºC. The Si 2p chemical shifts allowed determination of oxide thickness as a function of time with a precision of 1-2 Å. The initial oxidation rate was very high (up to ~234 Å/h). Then, after an initial oxide thickness of 6-22 Å was formed, the rate decreased markedly (~1.5-4.0Å/h). Neither rate regime can be explained by the standard Deal-Grove (D-G) model for Si oxidation. These results are a significant step toward developing a better understanding of this critical thickness regime.

310

Looking at Transistor Gate Oxide Formation in Real Time  

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

Looking at Transistor Gate Oxide Formation in Real Time Print Looking at Transistor Gate Oxide Formation in Real Time Print The oxide gate layer is critical to every transistor, and present-day layer thicknesses are in the 10-20 Å range (1-2 nm). However, little information exists on the oxidation process at this thickness. Available results are either for thicker layers grown under high-pressure conditions or for only the first couple of monolayers studied under high-vacuum conditions. Now, for the first time, a group of researchers has obtained real-time oxidation results for this elusive range. Using the ambient-pressure x-ray photoelectron spectroscopy (APXPS) endstation at ALS Beamline 9.3.2, they examined oxidation of Si(100) at pressures up to 1 torr and temperatures up to 450 ºC. The Si 2p chemical shifts allowed determination of oxide thickness as a function of time with a precision of 1-2 Å. The initial oxidation rate was very high (up to ~234 Å/h). Then, after an initial oxide thickness of 6-22 Å was formed, the rate decreased markedly (~1.5-4.0Å/h). Neither rate regime can be explained by the standard Deal-Grove (D-G) model for Si oxidation. These results are a significant step toward developing a better understanding of this critical thickness regime.

311

Imaging gene expression in real-time using aptamers  

Science Conference Proceedings (OSTI)

Signal transduction pathways are usually activated by external stimuli and are transient. The downstream changes such as transcription of the activated genes are also transient. Real-time detection of promoter activity is useful for understanding changes in gene expression, especially during cell differentiation and in development. A simple and reliable method for viewing gene expression in real time is not yet available. Reporter proteins such as fluorescent proteins and luciferase allow for non-invasive detection of the products of gene expression in living cells. However, current reporter systems do not provide for real-time imaging of promoter activity in living cells. This is because of the long time period after transcription required for fluorescent protein synthesis and maturation. We have developed an RNA reporter system for imaging in real-time to detect changes in promoter activity as they occur. The RNA reporter uses strings of RNA aptamers that constitute IMAGEtags (Intracellular MultiAptamer GEnetic tags), which can be expressed from a promoter of choice. The tobramycin, neomycin and PDC RNA aptamers have been utilized for this system and expressed in yeast from the GAL1 promoter. The IMAGEtag RNA kinetics were quantified by RT-qPCR. In yeast precultured in raffinose containing media the GAL1 promoter responded faster than in yeast precultured in glucose containing media. IMAGEtag RNA has relatively short half-life (5.5 min) in yeast. For imaging, the yeast cells are incubated with their ligands that are labeled with fluorescent dyes. To increase signal to noise, ligands have been separately conjugated with the FRET (Förster resonance energy transfer) pairs, Cy3 and Cy5. With these constructs, the transcribed aptamers can be imaged after activation of the promoter by galactose. FRET was confirmed with three different approaches, which were sensitized emission, acceptor photobleaching and donor lifetime by FLIM (fluorescence lifetime imaging microscopy). Real-time transcription was measured by FLIM-FRET, which was detected by the decrease in donor lifetime resulting from ligand binding to IMAGEtags that were newly synthesized from the activated GAL1 promoter. The FRET signal was specific for transcribed IMAGEtags.

Shin, Il Chung

2011-12-13T23:59:59.000Z

312

Dynamic simulation recalls condensate piping event  

Science Conference Proceedings (OSTI)

This article describes how experience gained from simulating and reconstructing a condensate piping event will be used by Consolidated Edison to analyze control system problems. A cooperative effort by Con Edison and the Chemical Engineering Department at Polytechnic University used modular modeling system to investigate the probable cause of a Con Edison condensate piping event. Con Edison commissioned the work to serve as a case study for the more general problem of control systems analysis using dynamic simulation and MMS.

Farrell, R.J.; Reneberg, K.O. (Polytechnic Univ., Brooklyn, NY (United States)); Moy, H.C. (Consolidated Edison Co., New York, NY (United States))

1994-05-01T23:59:59.000Z

313

Real-time characterization of partially observed epidemics using surrogate models.  

SciTech Connect

We present a statistical method, predicated on the use of surrogate models, for the 'real-time' characterization of partially observed epidemics. Observations consist of counts of symptomatic patients, diagnosed with the disease, that may be available in the early epoch of an ongoing outbreak. Characterization, in this context, refers to estimation of epidemiological parameters that can be used to provide short-term forecasts of the ongoing epidemic, as well as to provide gross information on the dynamics of the etiologic agent in the affected population e.g., the time-dependent infection rate. The characterization problem is formulated as a Bayesian inverse problem, and epidemiological parameters are estimated as distributions using a Markov chain Monte Carlo (MCMC) method, thus quantifying the uncertainty in the estimates. In some cases, the inverse problem can be computationally expensive, primarily due to the epidemic simulator used inside the inversion algorithm. We present a method, based on replacing the epidemiological model with computationally inexpensive surrogates, that can reduce the computational time to minutes, without a significant loss of accuracy. The surrogates are created by projecting the output of an epidemiological model on a set of polynomial chaos bases; thereafter, computations involving the surrogate model reduce to evaluations of a polynomial. We find that the epidemic characterizations obtained with the surrogate models is very close to that obtained with the original model. We also find that the number of projections required to construct a surrogate model is O(10)-O(10{sup 2}) less than the number of samples required by the MCMC to construct a stationary posterior distribution; thus, depending upon the epidemiological models in question, it may be possible to omit the offline creation and caching of surrogate models, prior to their use in an inverse problem. The technique is demonstrated on synthetic data as well as observations from the 1918 influenza pandemic collected at Camp Custer, Michigan.

Safta, Cosmin; Ray, Jaideep; Lefantzi, Sophia; Crary, David (Applied Research Associates, Arlington, VA); Sargsyan, Khachik; Cheng, Karen (Applied Research Associates, Arlington, VA)

2011-09-01T23:59:59.000Z

314

A GAUSSIAN PROCESS BASED APPROACH FOR HANDLING UNCERTAINTY IN VEHICLE DYNAMICS SIMULATION  

E-Print Network (OSTI)

Advances in vehicle modeling and simulation in recent years have led to designs that are safer, easier to handle, and less sensitive to external factors. Yet, the potential of simulation is adversely impacted by its limited ability to predict vehicle dynamics in the presence of uncertainty. A commonly occurring source of uncertainty in vehicle dynamics is the road-tire friction interaction, typically represented through a spatially distributed stochastic friction coefficient. The importance of its variation becomes apparent on roads with ice patches, where if the stochastic attributes of the friction coefficient are correctly factored into real time dynamics simulation, robust control strategies could be designed to improve transportation safety. This work concentrates on correctly accounting in the nonlinear dynamics of a car model for the inherent uncertainty in friction coefficient distribution at the road/tire interface. The outcome of this effort is the ability to quantify the effect of input uncertainty on a vehicle’s trajectory and the associated escalation of risk in driving. By using a space dependent Gaussian ? Address all correspondence to this author.

Kyle Schmitt; Justin Madsen; Mihai Anitescu; Dan Negrut

2008-01-01T23:59:59.000Z

315

HARTEX: a safe real-time kernel for distributed computer control systems  

Science Conference Proceedings (OSTI)

A hard real-time kernel is presented for distributed computer control systems (DCCS), highlighting a number of novel features, such as integrated scheduling of hard and soft real-time tasks as well as tasks and resources; high-performance time management ... Keywords: distributed computer control systems, object modelling techniques, real-time communication, real-time operating systems, scheduling algorithms

C. K. Angelov; I. E. Ivanov; A. Burns

2002-03-01T23:59:59.000Z

316

Energy-aware real-time communication in wireless ad-hoc micro sensors network  

Science Conference Proceedings (OSTI)

Perfect functioning not only at hardware level but also at software level design is indispensable to quench the thirst of an ideal real time communication. From software perspective, in the timeless sensitive communication context, Real-Time Operating ... Keywords: energy awareness, real-time communication, real-time operating system, sensor network

Sohail Jabbar; Abid Ali Minhas

2009-12-01T23:59:59.000Z

317

An algorithm to provide real time neutral beam substitution in the DIII-D tokamak  

Science Conference Proceedings (OSTI)

A key component of the DIII-D tokamak fusion experiment is a flexible and easy to expand digital control system which actively controls a large number of parameters in real-time. These include plasma shape, position, density, and total stored energy. This system, known as the PCS (plasma control system), also has the ability to directly control auxiliary plasma heating systems, such as the 20 MW of neutral beams routinely used on DIII-D. This paper describes the implementation of a real-time algorithm allowing substitution of power from one neutral beam for another, given a fault in the originally scheduled beam. Previously, in the event of a fault in one of the neutral beams, the actual power profile for the shot might be deficient, resulting in a less useful or wasted shot. Using this new real-time algorithm, a stand by neutral beam may substitute within milliseconds for one which has faulted. Since single shots can have substantial value, this is an important advance to DIII-D`s capabilities and utilization. Detailed results are presented, along with a description not only of the algorithm but of the simulation setup required to prove the algorithm without the costs normally associated with using physics operations time.

Phillips, J.C.; Greene, K.L.; Hyatt, A.W.; McHarg, B.B. Jr.; Penaflor, B.G.

1999-06-01T23:59:59.000Z

318

Real-time nonlinear optimization as a generalized equation.  

SciTech Connect

We establish results for the problem of tracking a time-dependent manifold arising in real-time optimization by casting this as a parametric generalized equation. We demonstrate that if points along a solution manifold are consistently strongly regular, it is possible to track the manifold approximately by solving a single linear complementarity problem (LCP) at each time step. We derive sufficient conditions guaranteeing that the tracking error remains bounded to second order with the size of the time step even if the LCP is solved only approximately. We use these results to derive a fast, augmented Lagrangian tracking algorithm and demonstrate the developments through a numerical case study.

Zavala, V. M.; Anitescu, M. (Mathematics and Computer Science)

2010-11-11T23:59:59.000Z

319

Near real time vapor detection and enhancement using aerosol adsorption  

DOE Patents (OSTI)

A vapor sample detection method where the vapor sample contains vapor and ambient air and surrounding natural background particles. The vapor sample detection method includes the steps of generating a supply of aerosol that have a particular effective median particle size, mixing the aerosol with the vapor sample forming aerosol and adsorbed vapor suspended in an air stream, impacting the suspended aerosol and adsorbed vapor upon a reflecting element, alternatively directing infrared light to the impacted aerosol and adsorbed vapor, detecting and analyzing the alternatively directed infrared light in essentially real time using a spectrometer and a microcomputer and identifying the vapor sample.

Novick, Vincent J.; Johnson, Stanley A.

1997-12-01T23:59:59.000Z

320

Real-time human collaboration monitoring and intervention  

DOE Patents (OSTI)

A method of and apparatus for monitoring and intervening in, in real time, a collaboration between a plurality of subjects comprising measuring indicia of physiological and cognitive states of each of the plurality of subjects, communicating the indicia to a monitoring computer system, with the monitoring computer system, comparing the indicia with one or more models of previous collaborative performance of one or more of the plurality of subjects, and with the monitoring computer system, employing the results of the comparison to communicate commands or suggestions to one or more of the plurality of subjects.

Merkle, Peter B. (Sandia Park, NM); Johnson, Curtis M. (Sandia Park, NM); Jones, Wendell B. (Albuquerque, NM); Yonas, Gerold (Albuquerque, NM); Doser, Adele B. (Albuquerque, NM); Warner, David J. (Rancho Santa Fe, CA)

2010-07-13T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

A Two-stage Kalman Filtering Approach for Robust and Real-time Power Systems State Tracking  

E-Print Network (OSTI)

of synchrophasor technology, Phasor Measurement Units (PMUs) are becoming increasingly attractive in various time developments in phasor technology make real- time dynamic state estimation possible with high-speed time, Richland, WA, USA, e-mail: zhenyu.huang@pnnl.gov. the past. In particular, the widespread deployment

Welch, Greg

322

Real-time Combustion Control and Diagnostics Sensor-Pressure Oscillation Monitor  

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

Combustion Control and Diagnostics Combustion Control and Diagnostics Sensor-Pressure Oscillation Monitor Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing its patented "Real-Time Combustion Control and Diagnostics Sensor-Pressure Oscillation Monitor" technology. Disclosed is NETL's sensor system and process for monitoring and controlling the amplitude and/or frequencies of dynamic pressure oscillations in combustion systems during active combustion processes. The combustion control and diagnostics sensor (CCADS) is designed for gas turbine combustors that are operated near the fuel-lean flame extinction limit to minimize production of the atmospheric pollutant NOx. CCADS eliminates the problems of flashback,

323

Real-Time System Log Monitoring/Analytics Framework  

SciTech Connect

Analyzing system logs provides useful insights for identifying system/application anomalies and helps in better usage of system resources. Nevertheless, it is simply not practical to scan through the raw log messages on a regular basis for large-scale systems. First, the sheer volume of unstructured log messages affects the readability, and secondly correlating the log messages to system events is a daunting task. These factors limit large-scale system logs primarily for generating alerts on known system events, and post-mortem diagnosis for identifying previously unknown system events that impacted the systems performance. In this paper, we describe a log monitoring framework that enables prompt analysis of system events in real-time. Our web-based framework provides a summarized view of console, netwatch, consumer, and apsched logs in real- time. The logs are parsed and processed to generate views of applications, message types, individual/group of compute nodes, and in sections of the compute platform. Also from past application runs we build a statistical profile of user/application characteristics with respect to known system events, recoverable/non-recoverable error messages and resources utilized. The web-based tool is being developed for Jaguar XT5 at the Oak Ridge Leadership Computing facility.

Oral, H Sarp [ORNL; Dillow, David A [ORNL; Park, Byung H [ORNL; Shipman, Galen M [ORNL; Geist, Al [ORNL; Gunasekaran, Raghul [ORNL

2011-01-01T23:59:59.000Z

324

Initial Studies Toward Real-Time Transmission Path Rating  

Science Conference Proceedings (OSTI)

Demand continues to increase while transmission line construction is being constrained by multiple factors— economic, environmental, and political. Effective and efficient utilization of transmission lines is thus of great importance in an open access environment. Large blocks of power are transferred from areas with inexpensive generation to heavy load demand areas or areas with high generation costs. This results in some transmission paths being loaded closer to their path ratings, which limits further power transfer between areas. Traditionally, rating of important paths was determined off line by assuming the worst-case study scenario; once determined, it could be used for years. With increasing uncertainty arising from rapid growth of renewable energy and smart technologies, path rating studies are needed in near-real time to account for the latest system status and support a reliable and economic power grid. This paper adopts a simplified procedure based on standards of the North American Electric Reliability Corporation (NERC) to determine total transfer capability (TTC) or transfer limit for the purpose of demonstrating the benefits and necessity of real-time path rating. Initial studies are conducted to compute TTC of a two-area test system and a 39-bus test system. Results indicate that path rating can be significantly affected by loading conditions, generator schedules, system topology and other factors.

Singh, Ruchi; Diao, Ruisheng; Cai, Niannian; Huang, Zhenyu; Tuck, Brian; Guo, Xinxin

2012-07-26T23:59:59.000Z

325

Repsol Cartagena Utilities Real Time Optimization -- A Success Story  

E-Print Network (OSTI)

"In 1998 Honeywell Hi-Spec Solutions successfully implemented a Utilities Optimization system at Repsol's Cartagena Spain Refinery Complex. The Utilities Optimization System is implemented using Honeywell's Hi-Spec Solutions ProfitMax R100 system for Real Time Optimization (RTO) which runs on an NT-based workstation. ProfitMax uses the NOVA modeling system from DOT Products Inc. for non-linear modeling and optimization. Data is supplied through Uniformance PHD, Honeywell Hi-Spec Solutions' real time database. The cogeneration system is controlled using Honeywell's IDC 3000 system. The Utility System at Repsol Cartagena refinery is a cogeneration system that supplies both electricity and steam to the site. The surplus electricity is exported to the National grid. The system consists of the following: • Gas Turbine and Heat Recovery Steam Generator • Four fired boilers • Four steam headers at various pressures • Three Back-Pressure/Condensing steam turbo-generators • Plant condensate system • Fuel gas collection and distribution system • Process steam producers and consumers • Numerous dual drivers (steam/electric) for various plant loads "

Piccolo, M.; Shyr, S.

1999-05-01T23:59:59.000Z

326

High-Performance Beam Simulator for the LANSCE Linac  

SciTech Connect

A high performance multiparticle tracking simulator is currently under development at Los Alamos. The heart of the simulator is based upon the beam dynamics simulation algorithms of the PARMILA code, but implemented in C++ on Graphics Processing Unit (GPU) hardware using NVIDIA's CUDA platform. Linac operating set points are provided to the simulator via the EPICS control system so that changes of the real time linac parameters are tracked and the simulation results updated automatically. This simulator will provide valuable insight into the beam dynamics along a linac in pseudo real-time, especially where direct measurements of the beam properties do not exist. Details regarding the approach, benefits and performance are presented.

Pang, Xiaoying [Los Alamos National Laboratory; Rybarcyk, Lawrence J. [Los Alamos National Laboratory; Baily, Scott A. [Los Alamos National Laboratory

2012-05-14T23:59:59.000Z

327

Physics results from dynamical overlap fermion simulations  

E-Print Network (OSTI)

I summarize the physics results obtained from large-scale dynamical overlap fermion simulations by the JLQCD and TWQCD collaborations. The numerical simulations are performed at a fixed global topological sector; the physics results in the theta-vacuum is reconstructed by correcting the finite volume effect, for which the measurement of the topological susceptibility is crucial. Physics applications we studied so far include a calculation of chiral condensate, pion mass, decay constant, form factors, as well as (vector and axial-vector) vacuum polarization functions and nucleon sigma term.

Shoji Hashimoto

2008-11-08T23:59:59.000Z

328

A Bio-Inspired Multi-Agent System Framework for Real-Time Load Management in All-Electric Ship Power Systems  

E-Print Network (OSTI)

All-electric ship power systems have limited generation capacity and finite rotating inertia compared with large power systems. Moreover, all-electric ship power systems include large portions of nonlinear loads and dynamic loads relative to the total power capacity, which may significantly reduce the stability margin. Pulse loads and other high-energy weapon loads in the system draw a large amount of power intermittently, which may cause significant frequency and voltage oscillations in the system. Thus, an effective real-time load management technique is needed to dynamically balance the load and generation to operate the system normally. Multi-agent systems, inspired by biological phenomena, aim to cooperatively achieve system objectives that are difficult to reach by a single agent or centralized controller. Since power systems include various electrical components with different dynamical systems, conventional homogeneous multi-agent system cooperative controllers have difficulties solving the real-time load management problem with heterogeneous agents. In this dissertation, a novel heterogeneous multi-agent system cooperative control methodology is presented based on artificial potential functions and reduced-order agent models to cooperatively achieve real-time load management for all-electric ship power systems. The technique integrates high-order system dynamics and various kinds of operational constraints into the multi-agent system, which improves the accuracy of the cooperative controller. The multi-agent system includes a MVAC multiagent system and a DC zone multi-agent, which are coordinated by an AC-DC communication agent. The developed multi-agent system framework and the notional all-electric ship power system model were simulated in PSCAD software. Case studies and performance analysis of the MVAC multi-agent system and the DC zone multi-agent system were performed. The simulation results indicated that propulsion loads and pulse loads can be successfully coordinated to reduce the impact of pulse loads on the power quality of all-electric ship power systems. Further, the switch status or power set-point of loads in DC zones can be optimally determined to dynamically balance the generation and load while satisfying the operational constraints of the system and considering load priorities. The method has great potential to be extended to other isolated power systems, such as microgrids.

Feng, Xianyong

2012-05-01T23:59:59.000Z

329

IGCC Dynamic Simulator and Training Center  

SciTech Connect

Integrated Gasification Combined Cycle (IGCC) is emerging as the technology of choice for providing clean, low-cost electricity for the next generation of coal-fired power plants and will play a central role in the development of high-efficiency, zero-emissions power plants such as FutureGen. Several major utilities and developers recently announced plans to build IGCC plants and other major utilities are evaluating IGCC’s suitability for base-load capacity additions. This recent surge of attention to IGCC power generation is creating a growing demand for experience with the analysis, operation, and control of commercial-scale IGCC plants. To meet this need, the National Energy Technology Laboratory (NETL) has launched a project to develop a generic, full-scope, IGCC dynamic plant simulator for use in establishing a state-of-the-art simulator training center at West Virginia University’s (WVU) National Research Center for Coal and Energy (NRCCE). The IGCC Dynamic Simulator & Training (DS&T) Center will be established under the auspices of the Collaboratory for Process & Dynamic Systems Modeling (“Collaboratory”) organized between NETL, WVU, the University of Pittsburgh, and Carnegie Mellon University.

Zitney, S.E.; Erbes, M.R. (Enginomix, LLC)

2006-10-01T23:59:59.000Z

330

Real Time Flame Monitoring of Gasifier Burner and Injectors  

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

8 8 Gasification Technologies contacts Gary J. stiegel Gasification Technology Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236 412-386-4499 gary.stiegel@netl.doe.gov Jenny tennant Project Manager National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507 304-285-4830 jenny.tennant@netl.doe.gov David Rue Principal Investigator Gas Technology Institute 1700 South Mount Prospect Road Des Plaines, IL 60018 847-768-0508 david.rue@gastechnology.org Real Time Flame moniToRing oF gasiFieR BuRneR and injecToRs Description Combustion scientists and engineers have studied radiant emissions of various flames for many years. For some time, technologists have understood the rich potential for

331

A study on real-time pricing electric tariffs  

Science Conference Proceedings (OSTI)

With deregulation in the electric industry, customers have new opportunities to reduce their electricity cost, one of which consists of using real-time pricing (RTP) tariffs. The authors surveyed electric utilities in the country to investigate how these tariffs are presently implemented to help potential customers understand RTP tariffs. The survey found that the most common type of RTP tariff is a two-part tariff. It consists of a customer baseline load (CBL) charge and an energy charge (or credit) based on usage above (or below) the CBL charged at hourly prices. This type of tariff is explained using Oklahoma Gas and Electric (OG and E)`s day-ahead-pricing (DAP) tariff and calculation examples. This article also investigates the effect of customer flexibility on the charges under the DAP tariff by comparing three different types of customer response.

Mont, J.A.; Turner, W.C. [Oklahoma State Univ., Stillwater, OK (United States). School of Industrial Engineering and Management

1999-10-01T23:59:59.000Z

332

Real-time neural network earthquake profile predictor  

DOE Patents (OSTI)

A neural network has been developed that uses first-arrival energy to predict the characteristics of impending earthquake seismograph signals. The propagation of ground motion energy through the earth is a highly nonlinear function. This is due to different forms of ground motion as well as to changes in the elastic properties of the media throughout the propagation path. The neural network is trained using seismogram data from earthquakes. Presented with a previously unseen earthquake, the neural network produces a profile of the complete earthquake signal using data from the first seconds of the signal. This offers a significant advance in the real-time monitoring, warning, and subsequent hazard minimization of catastrophic ground motion. 17 figs.

Leach, R.R.; Dowla, F.U.

1996-02-06T23:59:59.000Z

333

Real-time neural network earthquake profile predictor  

DOE Patents (OSTI)

A neural network has been developed that uses first-arrival energy to predict the characteristics of impending earthquake seismograph signals. The propagation of ground motion energy through the earth is a highly nonlinear function. This is due to different forms of ground motion as well as to changes in the elastic properties of the media throughout the propagation path. The neural network is trained using seismogram data from earthquakes. Presented with a previously unseen earthquake, the neural network produces a profile of the complete earthquake signal using data from the first seconds of the signal. This offers a significant advance in the real-time monitoring, warning, and subsequent hazard minimization of catastrophic ground motion.

Leach, Richard R. (Castro Valley, CA); Dowla, Farid U. (Castro Valley, CA)

1996-01-01T23:59:59.000Z

334

TRANSIENT, REAL-TIME, PARTICULATE EMISSION MEASUREMENTS IN DIESEL ENGINES  

DOE Green Energy (OSTI)

This paper reports our efforts to develop an instrument, TG-1, to measure particulate emissions from diesel engines in real-time. TG-1 while based on laser-induced incandescence allows measurements at 10 Hz on typical engine exhausts. Using such an instrument, measurements were performed in the exhaust of a 1.7L Mercedes Benz engine coupled to a low inertia dynamometer. Comparative measurements performed under engine steady state conditions showed the instrument to agree within {+-}12% of measurements performed with an SMPS. Moreover, the instrument had far better time response and time resolution than a TEOM{reg_sign} 1105. Also, TG-1 appears to surpass the shortcomings of the TEOM instrument, i.e., of yielding negative values under certain engine conditions and, being sensitive to external vibration.

Gupta, S; Shih, J; Hillman, G; sekar, R; Graze, R; Shimpi, S; Martin, W; Pier, D

2003-08-24T23:59:59.000Z

335

Implementing image processing applications on a real-time architecture  

E-Print Network (OSTI)

Abstract This paper presents three examples of realtime image processing applications that were implemented on a data- ow architecture developed at the ETCA. Low-level image processing is performed on a regular three-dimensional network of 1024 custom data- ow processors. Image features previously extracted in the low-level step are handled by a two-dimensional network of 12 general purpose processors. Fast prototyping of real-time image processing applications is achieved through a programming environment including a complete stream from functional programming speci cation to network con guration. A large class of algorithms can be implemented. Among them we describe a non-linear lter, a connected component labeling and a colored object tracking. Figure 1: The Functional Computer I.

G. Quenot; C. Coutelle; J. Serot; B. Zavidovique

1993-01-01T23:59:59.000Z

336

Real-time monitoring of the TVA power system  

SciTech Connect

This article describes how the Tennessee Valley Authority (TVA) is experimenting with one of the many concepts for the uses of phasor measurements, that of utilizing phasor measurement units (PMUs) as a state estimation system. However, the term state estimation no longer applies; what is being performed is a state determination in near real-time. The PMU is a transducer that can measure voltage and current with very high accuracy. It has the ability to calculate watts, vars, frequency, and phase angle twelve times per power line cycle. The PMU can be placed in the power system so as to provide time-stamped voltage and current phasors that can be used as state variables. Input from other PMUs throughout the power system can be synchronized to within 1 microsecond via the Global Positioning System (GPS). These real-time state variables provided by the PMUs allow state estimation to be replaced by state determination. The PMUs monitoring the power system can also provide the necessary data to accurately depict events and disturbances. The PMU can be set to be triggered by an event or disturbance. A user-defined table of data, including pretrigger data, which is the sampled data for a specified interval, is stored in the PMU. The data from a single PMU can be retrieved and analyzed by popular data analysis packages to show the performance of control and protection equipment. The tables retrieved from a network of PMUs can be used to determine the system response to these events and disturbances.

Cease, T.W.; Feldhaus, B. (Univ. of Tennessee, Chattanooga, TN (United States))

1994-07-01T23:59:59.000Z

337

FIRST RESULTS FROM THE CATALINA REAL-TIME TRANSIENT SURVEY  

Science Conference Proceedings (OSTI)

We report on the results from the first six months of the Catalina Real-Time Transient Survey (CRTS). In order to search for optical transients (OTs) with timescales of minutes to years, the CRTS analyses data from the Catalina Sky Survey which repeatedly covers 26,000 of square degrees on the sky. The CRTS provides a public stream of transients that are bright enough to be followed up using small telescopes. Since the beginning of the survey, all CRTS transients have been made available to astronomers around the world in real time using HTML tables,RSS feeds, and VOEvents. As part of our public outreach program, the detections are now also available in Keyhole Markup Language through Google Sky. The initial discoveries include over 350 unique OTs rising more than 2 mag from past measurements. Sixty two of these are classified as supernovae (SNe), based on light curves, prior deep imaging and spectroscopic data. Seventy seven are due to cataclysmic variables (CVs; only 13 previously known), while an additional 100 transients were too infrequently sampled to distinguish between faint CVs and SNe. The remaining OTs include active galactic nucleus, blazars, high-proper-motions stars, highly variable stars (such as UV Ceti stars), and transients of an unknown nature. Our results suggest that there is a large population of SNe missed by many current SN surveys because of selection biases. These objects appear to be associated with faint host galaxies. We also discuss the unexpected discovery of white dwarf binary systems through dramatic eclipses.

Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R. [California Institute of Technology, 1200 E. California Blvd., CA 91225 (United States); Beshore, E.; Larson, S.; Boattini, A.; Gibbs, A.; Hill, R.; Kowalski, R. [Department of Planetary Sciences, University of Arizona, Lunar and Planetary Laboratory, 1629 E. University Blvd., Tucson, AZ 85721 (United States); Christensen, E. [Gemini Observatory, Casilla 603, La Serena (Chile); Catelan, M. [Pontificia Universidad Catolica de Chile, Departamento de AstronomIa y AstrofIsica, Av. Vicuna Mackena 4860, 782-0436 Macul, Santiago (Chile)

2009-05-01T23:59:59.000Z

338

Flow Control of Real Time Multimedia Applications Using Model Predictive Control with a Feed Forward Term  

E-Print Network (OSTI)

Multimedia applications over the Internet are getting more and more popular. While non-real-time streaming services, such as YouTube and Megavideo, are attracting millions of visiting per day, real-time conferencing applications, of which some instances are Skype and Yahoo Voice Chat, provide an interesting experience of communication. Together, they make the fancy Internet world become more and more amusing. Undoubtedly, multimedia flows will eventually dominate the computer network in the future. As the population of multimedia flows increases gradually on the Internet, quality of their service (QoS) is more of a concern. At the moment, the Internet does not have any guarantee on the quality of multimedia services. To completely surpass this limitation, modifications to the network structure is a must. However, it will take years and billions of dollars in investment to achieve this goal. Meanwhile, it is essential to find alternative ways to improve the quality of multimedia services over the Internet. In the past few years, many endeavors have been carried on to solve the problem. One interesting approach focuses on the development of end-to-end congestion control strategies for UDP multimedia flows. Traditionally, packet losses and delays have been commonly used to develop many known control schemes. Each of them only characterizes some different aspects of network congestion; hence, they are not ideal as feedback signals alone. In this research, the flow accumulation is the signal used in feedback for flow control. It has the advantage of reflecting both packet losses and delays; therefore, it is a better choice. Using network simulations, the accumulations of real-time audio applications are collected to construct adaptive flow controllers. The reason for choosing these applications is that they introduce more control challenges than non-real-time services. One promising flow control strategy was proposed by Bhattacharya and it was based on Model Predictive Control (MPC). The controller was constructed from an ARX predictor. It was demonstrated that this control scheme delivers a good QoS while reducing bandwidth use in the controlled flows by 31 percent to 44 percent. However, the controller sometime shows erratic response and bandwidth usage jumps frequently between lowest and highest values. This is not desirable. For an ideal controller, the controlled bandwidth should vary near its mean. To eliminate the deficiency in the strategy proposed by Bhattacharya, it is proposed to introduce a feed forward term into the MPC formulation, in addition to the feedback terms. Simulations show that the modified MPC strategy maintains the benefits of the Bhattacharya strategy. Furthermore, it increases the probability of bandwidth savings from 58 percent for the case of Bhattacharya model to about 99 percent for this work.

Duong, Thien Chi

2010-12-01T23:59:59.000Z

339

Geek-Up[09.03.10] -- Innovative Silicon Wafers, Real-Time Power...  

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

9.03.10 -- Innovative Silicon Wafers, Real-Time Power Traders and Petascale & Exascale Supercomputers Geek-Up09.03.10 -- Innovative Silicon Wafers, Real-Time Power Traders and...

340

The design and implementation of real-time environment monitoring systems based on wireless sensor networks  

Science Conference Proceedings (OSTI)

This research focuses on the implementation of a real-time environment monitoring system for environment detection using wireless sensor networks. The purpose of our research is to construct the system on the real-time environment with the technology ...

Kyung-Hoon Jung; Seok-Cheol Lee; Hyun-Suk Hwang; Chang-Soo Kim

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Armored RNA as virus surrogate in a real-time reverse transcriptase PCR assay proficiency panel  

E-Print Network (OSTI)

second ring test to evaluate RT-PCR detection methods. Vet.real-time, reverse transcription-PCR assays for detection ofHigh-throughput real-time RT-PCR assay to detect the exotic

Hietala, S K; Crossley, B M

2006-01-01T23:59:59.000Z

342

Quantification of enterococci and human adenoviruses in environmental samples by real-time PCR  

E-Print Network (OSTI)

uorogenic probe tech- nique (TaqMan PCR) to the detection of2003. Multiplexed, real-time PCR for quantitative detectionS. Sayler. 2003. Real-time PCR quanti?- cation of nitrifying

He, J W; Jiang, Sunny C

2005-01-01T23:59:59.000Z

343

Gain Time Reclaiming in High Performance Real-Time Java Systems  

E-Print Network (OSTI)

The run-time characteristics of Java, such as high frequency of method invocation, dynamic dispatching and dynamic loading, make Java more difficult than other object-oriented programming languages, such as C++, for conducting Worst-Case Execution Time (WCET) analysis. To offer a more flexible way to develop object-oriented real-time applications in the realtime Java environment without loss of predicability and performance, we propose a novel gain time reclaiming framework integrated with WCET analysis. This paper demonstrates how to improve the utilisation and performance of the whole system by reclaiming gain time at run-time. Our approach shows that integrating WCET with gain time reclaiming can not only provide a more flexible environment, but it also does not necessarily result in unsafe or unpredictable timing behaviour.

Erik Yu-Shing Hu; Andy Wellings; Guillem Bernat

2003-01-01T23:59:59.000Z

344

Practical Method of Adaptive Radiotherapy for Prostate Cancer Using Real-Time Electromagnetic Tracking  

SciTech Connect

Purpose: We have created an automated process using real-time tracking data to evaluate the adequacy of planning target volume (PTV) margins in prostate cancer, allowing a process of adaptive radiotherapy with minimal physician workload. We present an analysis of PTV adequacy and a proposed adaptive process. Methods and Materials: Tracking data were analyzed for 15 patients who underwent step-and-shoot multi-leaf collimation (SMLC) intensity-modulated radiation therapy (IMRT) with uniform 5-mm PTV margins for prostate cancer using the Calypso Registered-Sign Localization System. Additional plans were generated with 0- and 3-mm margins. A custom software application using the planned dose distribution and structure location from computed tomography (CT) simulation was developed to evaluate the dosimetric impact to the target due to motion. The dose delivered to the prostate was calculated for the initial three, five, and 10 fractions, and for the entire treatment. Treatment was accepted as adequate if the minimum delivered prostate dose (D{sub min}) was at least 98% of the planned D{sub min}. Results: For 0-, 3-, and 5-mm PTV margins, adequate treatment was obtained in 3 of 15, 12 of 15, and 15 of 15 patients, and the delivered D{sub min} ranged from 78% to 99%, 96% to 100%, and 99% to 100% of the planned D{sub min}. Changes in D{sub min} did not correlate with magnitude of prostate motion. Treatment adequacy during the first 10 fractions predicted sufficient dose delivery for the entire treatment for all patients and margins. Conclusions: Our adaptive process successfully used real-time tracking data to predict the need for PTV modifications, without the added burden of physician contouring and image analysis. Our methods are applicable to other uses of real-time tracking, including hypofractionated treatment.

Olsen, Jeffrey R.; Noel, Camille E.; Baker, Kenneth; Santanam, Lakshmi; Michalski, Jeff M. [Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO (United States); Parikh, Parag J., E-mail: pparikh@radonc.wustl.edu [Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO (United States)

2012-04-01T23:59:59.000Z

345

Flight code validation simulator  

Science Conference Proceedings (OSTI)

An End-To-End Simulation capability for software development and validation of missile flight software on the actual embedded computer has been developed utilizing a 486 PC, i860 DSP coprocessor, embedded flight computer and custom dual port memory interface hardware. This system allows real-time interrupt driven embedded flight software development and checkout. The flight software runs in a Sandia Digital Airborne Computer (SANDAC) and reads and writes actual hardware sensor locations in which IMU (Inertial Measurements Unit) data resides. The simulator provides six degree of freedom real-time dynamic simulation, accurate real-time discrete sensor data and acts on commands and discretes from the flight computer. This system was utilized in the development and validation of the successful premier flight of the Digital Miniature Attitude Reference System (DMARS) in January 1995 at the White Sands Missile Range on a two stage attitude controlled sounding rocket.

Sims, B.A.

1995-08-01T23:59:59.000Z

346

Can critical real-time services of public infrastructures run over ethernet and MPLS networks?  

Science Conference Proceedings (OSTI)

With the adoption of Ethernet-IP as the main technology for building end-to-end real-time networks, the requirement to deliver high availability, quality and secure services over Ethernet and MPLS has become strategic. Critical real-time traffic is generally ... Keywords: MPLS, critical systems, ethernet, real-time networks

Jaime Lloret; Francisco Javier Sanchez; Hugo Coll; Fernando Boronat

2008-05-01T23:59:59.000Z

347

Hardware support for WCET analysis of hard real-time multicore systems  

Science Conference Proceedings (OSTI)

The increasing demand for new functionalities in current and future hard real-time embedded systems like automotive, avionics and space industries is driving an increase in the performance required in embedded processors. Multicore processors represent ... Keywords: analyzability, cache partitioning, hard real-time, interconnection network, multicore, real-time embedded systems, wcet

Marco Paolieri; Eduardo Quiñones; Francisco J. Cazorla; Guillem Bernat; Mateo Valero

2009-06-01T23:59:59.000Z

348

An Automated Test Framework for Hard Real-Time Communication Systems  

E-Print Network (OSTI)

An Automated Test Framework for Hard Real-Time Communication Systems MITHUN HANUMANAHALLI NAGAIAH ii #12;An Automated Test Framework for Hard Real-Time Communication Systems Master thesis project are subjected to hard real-time communication require- ments. The purpose of this thesis is in introducing tools

Jantsch, Axel

349

Rapid Real-Time PCR Method for Bacterial Source Tracking Using DNA FRET Probes  

E-Print Network (OSTI)

Rapid Real-Time PCR Method for Bacterial Source Tracking Using DNA FRET Probes Jeff Brady, Research have developed a 10 locus genotyping method using real-time PCR with adjacent-hybridizing DNA: real-time PCR, FRET, Microbial Source Tracking #12;

350

A Gaussian process-based approach for handling uncertainty in vehicle dynamics simulation.  

Science Conference Proceedings (OSTI)

Advances in vehicle modeling and simulation in recent years have led to designs that are safer, easier to handle, and less sensitive to external factors. Yet, the potential of simulation is adversely impacted by its limited ability to predict vehicle dynamics in the presence of uncertainty. A commonly occurring source of uncertainty in vehicle dynamics is the road-tire friction interaction, typically represented through a spatially distributed stochastic friction coefficient. The importance of its variation becomes apparent on roads with ice patches, where if the stochastic attributes of the friction coefficient are correctly factored into real time dynamics simulation, robust control strategies could be designed to improve transportation safety. This work concentrates on correctly accounting in the nonlinear dynamics of a car model for the inherent uncertainty in friction coefficient distribution at the road/tire interface. The outcome of this effort is the ability to quantify the effect of input uncertainty on a vehicle's trajectory and the associated escalation of risk in driving. By using a space-dependent Gaussian process, the statistical representation of the friction coefficient allows for consistent space dependence of randomness. The approach proposed allows for the incorporation of noise in the observed data and a nonzero mean for inhomogeneous distribution of the friction coefficient. Based on the statistical model considered, consistent friction coefficient sample distributions are generated over large spatial domains of interest. These samples are subsequently used to compute and characterize the statistics associated with the dynamics of a nonlinear vehicle model. The information concerning the state of the road and thus the friction coefficient is assumed available (measured) at a limited number of points by some sensing device that has a relatively homogeneous noise field (satellite picture or ground sensors, for instance). The methodology proposed can be modified to incorporate information that is sensed by each individual car as it advances along its trajectory.

Schmitt, K.; Madsen, J.; Anitescu, M.; Negrut, D.; Mathematics and Computer Science; Univ. of Wisconsin at Madison

2009-01-01T23:59:59.000Z

351

Distributed Real-Time Emulation of Formally-Defined Patterns for Safe Medical Device Control  

E-Print Network (OSTI)

Safety of medical devices and of their interoperation is an unresolved issue causing severe and sometimes deadly accidents for patients with shocking frequency. Formal methods, particularly in support of highly reusable and provably safe patterns which can be instantiated to many device instances can help in this regard. However, this still leaves open the issue of how to pass from their formal specifications in logical time to executable emulations that can interoperate in physical time with other devices and with simulations of patient and/or doctor behaviors. This work presents a specification-based methodology in which virtual emulation environments can be easily developed from formal specifications in Real-Time Maude, and can support interactions with other real devices and with simulation models. This general methodology is explained in detail and is illustrated with two concrete scenarios which are both instances of a common safe formal pattern: one scenario involves the interaction of a provably safe ...

Sun, Mu; 10.4204/EPTCS.36.9

2010-01-01T23:59:59.000Z

352

Cybersecurity through Real-Time Distributed Control Systems  

SciTech Connect

Critical infrastructure sites and facilities are becoming increasingly dependent on interconnected physical and cyber-based real-time distributed control systems (RTDCSs). A mounting cybersecurity threat results from the nature of these ubiquitous and sometimes unrestrained communications interconnections. Much work is under way in numerous organizations to characterize the cyber threat, determine means to minimize risk, and develop mitigation strategies to address potential consequences. While it seems natural that a simple application of cyber-protection methods derived from corporate business information technology (IT) domain would lead to an acceptable solution, the reality is that the characteristics of RTDCSs make many of those methods inadequate and unsatisfactory or even harmful. A solution lies in developing a defense-in-depth approach that ranges from protection at communications interconnect levels ultimately to the control system s functional characteristics that are designed to maintain control in the face of malicious intrusion. This paper summarizes the nature of RTDCSs from a cybersecurity perspec tive and discusses issues, vulnerabilities, candidate mitigation approaches, and metrics.

Kisner, Roger A [ORNL; Manges, Wayne W [ORNL; MacIntyre, Lawrence Paul [ORNL; Nutaro, James J [ORNL; Munro Jr, John K [ORNL; Ewing, Paul D [ORNL; Howlader, Mostofa [ORNL; Kuruganti, Phani Teja [ORNL; Wallace, Richard M [ORNL; Olama, Mohammed M [ORNL

2010-04-01T23:59:59.000Z

353

Real Time Pricing Tie Line Control: A Case Study  

E-Print Network (OSTI)

A Tie Line Control System maintains the purchase quantity of electrical energy an industrial facility buys from a utility company. Implementing an advanced Tie Line Control system automates the buy versus make decision process for an industrial facility in order to optimize the use of energy by either a supply-side method or a demand-side method. If a facility possesses supply-side resources, such as self-generation, the user can choose to maximize on-site energy generation, when it is less expensive than the price offered by the utility. Conversely, when the price to buy energy is less expensive than it is to produce it, a facility may choose to back off on self-generation and buy more energy. One such Advanced Tie Line Control system, designed by Automation Applications, Incorporated (AAI) and installed at a pilot facility, utilizes a real-time pricing utility contract and provides savings approaching one million dollars per year. This paper is a case study of this system implementation and the results achieved.

Childress, R.

1999-05-01T23:59:59.000Z

354

Real-time chemical analysis of aerosol particles  

Science Conference Proceedings (OSTI)

An important aspect of environmental atmospheric monitoring requires the characterization of airborne microparticles and aerosols. Unfortunately, traditional sample collection and handling techniques are prone to contamination and interference effects that can render an analysis invalid. These problems can be avoided by using real-time atmospheric sampling techniques followed by immediate mass spectrometric analysis. The former is achieved in these experiments via a two state differential pumping scheme that is attached directly to a commercially available quadruple ion trap mass spectrometer. Particles produced by an external particle generator enter the apparatus and immediately pass through two cw laser/fiberoptic based detectors positioned two centimeters apart. Timing electronics measure the time between detection events, estimate the particles arrival in the center of the ion trap and control the firing of a YAG laser. Ions produced when the UV laser light ablates the particle`s surface are stored by the ion trap for mass analysis. Ion trap mass spectrometers have several advantages over conventional time-of-flight instruments. First, they are capable of MS/MS analysis by the collisional dissociation of a stored species, This permits complete chemical characterization of airborne samples. Second, ion traps are small and lend themselves to portable, field oriented applications.

Yang, M.; Whitten, W.B.; Ramsey, J.M.

1995-04-01T23:59:59.000Z

355

Real-Time Out-of-Core Rendering  

E-Print Network (OSTI)

Hierarchical levels of details (HLODs) have proven to be an efficient way to visualize complex environments and models even in an out-of-core system. Large objects are partitioned into a spatial hierarchy and for each node a level of detail is generated for efficient view-dependent rendering. To ensure correct matching between adjacent nodes in the hierarchy care has to be taken to prevent cracks along the cuts. This either leads to severe simplification constraints at the cuts and thus to a significantly higher number of triangles or the need for a costly runtime stitching of these nodes. In this paper we present an out-of-core visualization algorithm that overcomes this problem by filling the cracks generated by the simplification algorithm with appropriately shaded Fat Borders. Furthermore, several minor yet important improvements of previous approaches are made. This way we come up with a simple nevertheless efficient viewdependent rendering technique which allows for the natural incorporation of state-of-theart culling, simplification, compression and prefetching techniques leading to real-time rendering performance of the overall system. Several examples demonstrate the efficiency of our approach.

Michael Guthe; Pavel Borodin; Reinhard Klein

2004-01-01T23:59:59.000Z

356

Real-time multi-mode neutron multiplicity counter  

DOE Patents (OSTI)

Embodiments are directed to a digital data acquisition method that collects data regarding nuclear fission at high rates and performs real-time preprocessing of large volumes of data into directly useable forms for use in a system that performs non-destructive assaying of nuclear material and assemblies for mass and multiplication of special nuclear material (SNM). Pulses from a multi-detector array are fed in parallel to individual inputs that are tied to individual bits in a digital word. Data is collected by loading a word at the individual bit level in parallel, to reduce the latency associated with current shift-register systems. The word is read at regular intervals, all bits simultaneously, with no manipulation. The word is passed to a number of storage locations for subsequent processing, thereby removing the front-end problem of pulse pileup. The word is used simultaneously in several internal processing schemes that assemble the data in a number of more directly useable forms. The detector includes a multi-mode counter that executes a number of different count algorithms in parallel to determine different attributes of the count data.

Rowland, Mark S; Alvarez, Raymond A

2013-02-26T23:59:59.000Z

357

Achieving Superior Plant Energy Performance Utilizing Real-time Data  

E-Print Network (OSTI)

After years of attempting to streamline operations in an effort to reduce operational costs, many industrial manufacturers are turning to strategic energy management as a potential money-saving strategy. In their efforts, managers face a number of significant barriers such as low awareness and expertise, elevated financial hurdle rate, lack of capital allocation and procurement constraints. In addition, energy efficiency efforts may be hampered by traditional single point energy reduction methods such as reviewing utility bills, getting equipment upgrade suggestions from vendors or one-time energy audits. Research demonstrates that these techniques have neither the visibility nor continuity to achieve energy reductions that are consistent and persistent. With the right Best Practices, however, using new methodologies and technologies unavailable only a few years ago, enterprises can achieve dramatic energy reductions and their resulting cost savings. These Best Practices are founded on 1) application of a systematic methodology for understanding where energy is used and how to reduce it; and 2) achieving visibility into sufficiently granular real-time information on key performance indicators; 3) integrating new technology into overall corporate strategy and processes to change behavior.

Subramanya, S.

2010-01-01T23:59:59.000Z

358

Real time curriculum map for internal medicine residency  

E-Print Network (OSTI)

which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Background: To manage the voluminous formal curriculum content in a limited amount of structured teaching time, we describe the development and evaluation of a curriculum map for academic half days (AHD) in a core internal medicine residency program. Methods: We created a 3-year cyclical curriculum map (an educational tool combining the content, methodology and timetabling of structured teaching), comprising a matrix of topics under various specialties/themes and corresponding AHD hours. All topics were cross-matched against the ACP-ASIM in-training examination, and all hours were colour coded based on the categories of core competencies. Residents regularly updated the map on a real time basis. Results: There were 208 topics covered in 283 AHD hours. All topics represented core competencies with minimal duplication (78 % covered once in 3 years). Only 42 hours (15%) involved non-didactic teaching, which increased after implementation of the map (18–19 hours/year versus baseline 5 hours/year). Most AHD hours (78%) focused on medical expert competencies. Resident satisfaction (90 % response) was high throughout (range 3.64 ± 0.21, 3.84 ± 0.14 out of 4),

Roger Y Wong; J Mark Roberts; Roger Y Wong; J Mark Roberts

2007-01-01T23:59:59.000Z

359

Sampling apparatus for real-time alkali monitor  

DOE Patents (OSTI)

This report describes a sampling apparatus which provides representatives samples of high-temperature, high-pressure coal- derived process gases for analysis of alkali concentrations in either a gaseous phase or in a particulate-bearing gaseous phase by a real-time alkali monitor. The apparatus includes a sampling probe in the form of a ceramic tube that is inserted in the stream of combustion products for gathering a representative stream of gaseous products. Critical flow orifices are connected in series between the probe and an alkali monitor burner. A valved vent line connected in-line between the critical flow orifices is used to vent a significant percentage of the flow from the first critical flow orifice device to maintain the upstream pressure required to provide the desired flow rate through the second critical orifice to the alkali monitor burner. The gaseous products in the system between the probe and the burner is heated to inhibit condensation of alkali species. 2 figs.

French, W.E.; Logan, R.G.; Pineault, R.L.

1989-02-27T23:59:59.000Z

360

Real-Time Combined Heat and Power Operational Strategy Using a Hierarchical Optimization Algorithm  

Science Conference Proceedings (OSTI)

Existing attempts to optimize the operation of Combined Heat and Power (CHP) systems for building applications have two major limitations: the electrical and thermal loads are obtained from historical weather profiles; and the CHP system models ignore transient responses by using constant equipment efficiencies. This paper considers the transient response of a building combined with a hierarchical CHP optimal control algorithm to obtain a real-time integrated system that uses the most recent weather and electric load information. This is accomplished by running concurrent simulations of two transient building models. The first transient building model uses current as well as forecast input information to obtain short term predictions of the thermal and electric building loads. The predictions are then used by an optimization algorithm, i.e., a hierarchical controller, that decides the amount of fuel and of electrical energy to be allocated at the current time step. In a simulation, the actual physical building is not available and, hence, to simulate a real-time environment, a second, building model with similar but not identical input loads are used to represent the actual building. A state-variable feedback loop is completed at the beginning of each time step by copying, i.e., measuring, the state variable from the actual building and restarting the predictive model using these ?measured? values as initial conditions. The simulation environment presented in this paper features nonlinear effects such as the dependence of the heat exchanger effectiveness on their operating conditions. The results indicate that the CHP engine operation dictated by the proposed hierarchical controller with uncertain weather conditions have the potential to yield significant savings when compared to conventional systems using current values of electricity and fuel prices.

Yun, Kyung Tae; Cho, Heejin; Luck, Rogelio; Mago, Pedro J.

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real-time Shape-based Particle Separation and Detailed In-situ Particle Shape Characterization  

SciTech Connect

Particle shape is an important attribute that is very difficult to characterize. We present a new portable system that offers, for the first time, the opportunity to separate particles with different shapes and characterize their chemical and physical properties, including their dynamic shape factors (DSFs) in the transition and free-molecular regimes, with high precision, in-situ, and in real-time. The system uses a new generation aerosol particle mass analyzer (APM) to classify particles based on their masses and transport them to a differential mobility analyzer (DMA) that is used to select particles of one charge, one mass, and one shape. These highly uniform particles are ready for use and/or characterization by any application or analytical tool. We combine APM and DMA with our single particle mass spectrometer, SPLAT II, to form the ADS, and demonstrate its utility to measure in real-time individual particle compositions and vacuum aerodynamic diameters to yield, for each selected shape, particle DSFs in two flow regimes. We apply the ADS to characterize aspherical ammonium sulfate and NaCl particles and show that both particle types have wide distribution of particle shapes with DSFs from nearly 1 to 1.5.

Beranek, Josef; Imre, D.; Zelenyuk, Alla

2012-02-07T23:59:59.000Z

362

Molecular dynamics simulations of ordered alkane chains physisorbed on graphite  

E-Print Network (OSTI)

Molecular dynamics simulations of ordered alkane chains physisorbed on graphite Reinhard Hentschke molecular axes oriented parallel to the substrate. Here we employ molecular dynamics (MD) simulations to obtain more details on the molecular order and dynamics within the alkane lamellae as a function

Peters, Achim

363

Data Analysis for Real Time Identification of Grid Disruptions  

DOE Green Energy (OSTI)

The U.S. electric power system comprises multiple distinct interconnections of generators, high voltage transmission systems, and local distribution systems that maintain a continuous balance between generation and load with impressive levels of efficiency and reliability. This critical infrastructure has served the nation remarkably well, but is likely to see more changes over the next decade than it has seen over the past century. In particular, the widespread deployment of renewable generation, smart-grid controls, energy storage, and new conducting materials will require fundamental changes in grid planning and the way we run the power grid. Two challenges in the realization of the smart grid technology are the ability to visualize the deluge of expected data streams for global situational awareness; as well as the ability to detect disruptive and classify such events from spatially-distributed high-speed power system frequency measurements. One element of smart grid technology is the installation of a wide-area frequency measurement system on the electric poles in the streets for conditions monitoring of the distribution lines. This would provide frequency measurements about the status of the electric grid and possible information about impending problems before they start compounding and cascading. The ability to monitor the distribution lines is just one facet of proposed smart grid technology. Other elements include the installation of advanced devices such as smart meters, the automation of transmission lines, the integration of renewable energy technologies such as solar and wind, and the advancement of plug-in hybrid electric vehicle technology. This chapter describes recent advancements in the area of intelligent data analysis for real time detection of disruptive events from power system frequency data collected using an existing internet-based frequency monitoring network (FNET), which is a precursor for future smart-grid systems.

Chandola, Varun [ORNL; Omitaomu, Olufemi A [ORNL; Fernandez, Steven J [ORNL

2012-01-01T23:59:59.000Z

364

Integrate Real-Time Weather with Thermostat Electrical Usage...  

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

Xiufeng Pang Weather and its dynamics are big drivers of energy usage. Integration of key weather variables - solar, wind, and temperature - into home energy management and demand...

365

Tracking Accuracy of a Real-Time Fiducial Tracking System for Patient Positioning and Monitoring in Radiation Therapy  

SciTech Connect

Purpose: In radiation therapy there is a need to accurately know the location of the target in real time. A novel radioactive tracking technology has been developed to answer this need. The technology consists of a radioactive implanted fiducial marker designed to minimize migration and a linac mounted tracking device. This study measured the static and dynamic accuracy of the new tracking technology in a clinical radiation therapy environment. Methods and Materials: The tracking device was installed on the linac gantry. The radioactive marker was located in a tissue equivalent phantom. Marker location was measured simultaneously by the radioactive tracking system and by a Microscribe G2 coordinate measuring machine (certified spatial accuracy of 0.38 mm). Localization consistency throughout a volume and absolute accuracy in the Fixed coordinate system were measured at multiple gantry angles over volumes of at least 10 cm in diameter centered at isocenter. Dynamic accuracy was measured with the marker located inside a breathing phantom. Results: The mean consistency for the static source was 0.58 mm throughout the tested region at all measured gantry angles. The mean absolute position error in the Fixed coordinate system for all gantry angles was 0.97 mm. The mean real-time tracking error for the dynamic source within the breathing phantom was less than 1 mm. Conclusions: This novel radioactive tracking technology has the potential to be useful in accurate target localization and real-time monitoring for radiation therapy.

Shchory, Tal [Navotek Medical, Ltd., Yokneam (Israel); Schifter, Dan; Lichtman, Rinat [Tel Aviv Medical Center (Israel); Neustadter, David, E-mail: david.n@navotek.co [Navotek Medical, Ltd., Yokneam (Israel); Corn, Benjamin W. [Tel Aviv Medical Center (Israel)

2010-11-15T23:59:59.000Z

366

Molecular dynamics simulation of Li surface erosion and bubble formation  

E-Print Network (OSTI)

Molecular dynamics simulation of Li surface erosion and bubble formation Z. Insepov *, A. Hassanein Structure and dynamical properties of liquid Li containing He atoms were studied by the Molecular Dynamics devices. Molecular dynamics (MD) method is capable of studying important collision processes and providing

Harilal, S. S.

367

Real Time Quantitative Radiological Monitoring Equipment for Environmental Assessment  

SciTech Connect

The Idaho National Laboratory (INL) has developed a suite of systems that rapidly scan, analyze, and characterize radiological contamination in soil. These systems have been successfully deployed at several Department of Energy (DOE) laboratories and Cold War Legacy closure sites. Traditionally, these systems have been used during the characterization and remediation of radiologically contaminated soils and surfaces; however, subsequent to the terrorist attacks of September 11, 2001, the applications of these systems have expanded to include homeland security operations for first response, continuing assessment and verification of cleanup activities in the event of the detonation of a radiological dispersal device. The core system components are a detector, a spectral analyzer, and a global positioning system (GPS). The system is computer controlled by menu-driven, user-friendly custom software designed for a technician-level operator. A wide variety of detectors have been used including several configurations of sodium iodide (NaI) and high-purity germanium (HPGe) detectors, and a large area proportional counter designed for the detection of x-rays from actinides such as Am-241 and Pu-238. Systems have been deployed from several platforms including a small all-terrain vehicle (ATV), hand-pushed carts, a backpack mounted unit, and an excavator mounted unit used where personnel safety considerations are paramount. The INL has advanced this concept, and expanded the system functionality to create an integrated, field-deployed analytical system through the use of tailored analysis and operations software. Customized, site specific software is assembled from a supporting toolbox of algorithms that streamline the data acquisition, analysis and reporting process. These algorithms include region specific spectral stripping, automated energy calibration, background subtraction, activity calculations based on measured detector efficiencies, and on-line data quality checks and measures. These analyses are combined to provide real-time areal activity and coverage maps that are displayed to the operator as the survey progresses. The flexible functionality of the INL systems are well suited to multiple roles supporting homeland security needs.

John R. Giles; Lyle G. Roybal; Michael V. Carpenter

2006-03-01T23:59:59.000Z

368

Optimal Real-time Dispatch for Integrated Energy Systems  

DOE Green Energy (OSTI)

This report describes the development and application of a dispatch optimization algorithm for integrated energy systems (IES) comprised of on-site cogeneration of heat and electricity, energy storage devices, and demand response opportunities. This work is intended to aid commercial and industrial sites in making use of modern computing power and optimization algorithms to make informed, near-optimal decisions under significant uncertainty and complex objective functions. The optimization algorithm uses a finite set of randomly generated future scenarios to approximate the true, stochastic future; constraints are included that prevent solutions to this approximate problem from deviating from solutions to the actual problem. The algorithm is then expressed as a mixed integer linear program, to which a powerful commercial solver is applied. A case study of United States Postal Service Processing and Distribution Centers (P&DC) in four cities and under three different electricity tariff structures is conducted to (1) determine the added value of optimal control to a cogeneration system over current, heuristic control strategies; (2) determine the value of limited electric load curtailment opportunities, with and without cogeneration; and (3) determine the trade-off between least-cost and least-carbon operations of a cogeneration system. Key results for the P&DC sites studied include (1) in locations where the average electricity and natural gas prices suggest a marginally profitable cogeneration system, optimal control can add up to 67% to the value of the cogeneration system; optimal control adds less value in locations where cogeneration is more clearly profitable; (2) optimal control under real-time pricing is (a) more complicated than under typical time-of-use tariffs and (b) at times necessary to make cogeneration economic at all; (3) limited electric load curtailment opportunities can be more valuable as a compliment to the cogeneration system than alone; and (4) most of the trade-off between least-cost and least-carbon IES is determined during the system design stage; for the IES system considered, there is little difference between least-cost control and least-carbon control.

Firestone, Ryan Michael

2007-05-31T23:59:59.000Z

369

Elevation cable modeling for interactive simulation of cranes  

Science Conference Proceedings (OSTI)

In this paper, the way to simulate hoisting cables in real time is addressed. We overcome instability in such simulation by considering a two-layered model: a model for the dynamics of a cable passing through a set of pulleys and an oscillation model ... Keywords: flexible cables, interactive simulation, physically-based animation

Ignacio García-Fernández; Marta Pla-Castells; Rafael J. Martínez-Durá

2008-07-01T23:59:59.000Z

370

Integration of Smart Home Data with Simulated Smart Grid  

E-Print Network (OSTI)

Integration of Smart Home Data with Simulated Smart Grid Introduction Data was generated using was simulated in the smart grid in RTDS. Objective Objective was to monitors or get real-time data about after getting the data. Objective is to model a dynamic load within simulated smart grid with live data

Collins, Gary S.

371

Molecular Dynamics Simulations of Microscale Fluid Transport  

E-Print Network (OSTI)

Recent advances in micro-science and technology, like Micro-ElectroMechanical Systems (MEMS), have generated a group of unique liquid flow problems that involve characteristic length scales of a micron. Also, in manufacturing processes such as coatings, current continuum models are unable to predict microscale physical phenomena that appear in these nonequilibrium systems. It is suspected that in these systems, molecular-level processes can control the interfacial energy and viscoelastic properties at the liquid/solid boundary. A massively parallel molecular dynamics (MD) code has been developed to better understand microscale transport mechanisms, fluid-structure interactions, and scale effects in micro-domains. Specifically, this MD code has been used to analyze liquid channel flow problems for a variety of channel widths, e.g. 0.005-0.05 microns. This report presents results from MD simulations of Poiseuille flow and Couette flow problems and address both scaling and modeling issues...

C. C. Wong; A. R. Lopez; M.J. Stevens; S. J. Plimpton; Category Uc; Like Micro-electro

1998-01-01T23:59:59.000Z

372

Kinetic Simulations of Fusion Energy Dynamics at the Extreme...  

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

Kinetic Simulations of Fusion Energy Dynamics at the Extreme Scale PI Name: William Tang PI Email: tang@pppl.gov Institution: Princeton Plasma Physics Laboratory Allocation...

373

Dynamic Simulation of Cell Voltage Resonance Effect in Aluminum ...  

Science Conference Proceedings (OSTI)

Dubal Cell Voltage Drop Initiatives towards Low Energy High Amperage Cells · Dynamic Simulation of Cell Voltage Resonance Effect in Aluminum Electrolysis ...

374

Computational Fluid Dynamic Simulations of a Regenerative Process...  

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

Fluid Dynamic Simulations of a Regenerative Process for Carbon Dioxide Capture in Advanced Gasification Based Power Systems Background The Department of Energy (DOE) National...

375

Molecular Statics and Molecular Dynamics Simulations of the ...  

Science Conference Proceedings (OSTI)

Presentation Title, Molecular Statics and Molecular Dynamics Simulations of the Critical Stress for Motion of a/3 Screw Dislocations in a-Ti at Low ...

376

Molecular Dynamics Simulation of Cavitation in Metallic Glass  

Science Conference Proceedings (OSTI)

We have undertaken a series of molecular dynamics simulations of cavitation under hydrostatic tension in a binary metallic glass analog using pair-wise ...

377

Two-Dimensional Computational Fluid Dynamics and Conduction Simulation...  

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

Two-Dimensional Computational Fluid Dynamics and Conduction Simulations of Heat Transfer in Horizontal Window Frames with Internal Cavities Title Two-Dimensional Computational...

378

Real-time modeling of complex atmospheric releases in urban areas  

Science Conference Proceedings (OSTI)

If a nuclear installation in or near an urban area has a venting, fire, or explosion, airborne radioactivity becomes the major concern. Dispersion models are the immediate tool for estimating the dose and contamination. Responses in urban areas depend on knowledge of the amount of the release, representative meteorological data, and the ability of the dispersion model to simulate the complex flows as modified by terrain or local wind conditions. A centralized dispersion modeling system can produce realistic assessments of radiological accidents anywhere in a country within several minutes if it is computer-automated. The system requires source-term, terrain, mapping and dose-factor databases, real-time meteorological data acquisition, three-dimensional atmospheric transport and dispersion models, and experienced staff. Experience with past responses in urban areas by the Atmospheric Release Advisory Capability (ARAC) program at Lawrence Livermore National Laboratory illustrate the challenges for three-dimensional dispersion models.

Baskett, R.L. [EG and G Energy Measurements, Inc., Pleasanton, CA (United States); Ellis, J.S.; Sullivan, T.J. [Lawrence Livermore National Lab., CA (United States)

1994-08-01T23:59:59.000Z

379

Avestar® - Integrated Gasification Combined Cycle (IGCC) Dynamic Simulator  

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

Integrated Gasification Combined Cycle (IGCC) Dynamic Simulator Integrated Gasification Combined Cycle (IGCC) Dynamic Simulator The AVESTAR® center offers courses using the Integrated Gasification Combined Cycle (IGCC) Dynamic Simulator. The IGCC simulator builds on and reaches beyond existing combined-cycle and conventional-coal power plant simulators to combine--for the first time--a Gasification with CO2 Capture process simulator with a Combined-Cycle power simulator together in a single dynamic simulation framework. The AVESTAR® center IGCC courses provide unique, comprehensive training on all aspects of an IGCC plant, illustrating the high-efficiency aspects of the gasifier, gas turbine, and steam turbine integration. IGCC Operator training station HMI display for overview of IGCC Plant - Train A Reference:

380

Killing Two Birds with One Stone: Can Real-Time Pricing Support Retail Competition and Demand Response?  

E-Print Network (OSTI)

are paying prices indexed to the real-time spot market, andusage at hourly prices indexed to the real-time and/or day-who pay prices indexed to the real-time market. Utility and

Barbose, Galen; Bharvirkar, Ranjit; Goldman, Charles; Hopper, Nicole; Neenan, Bernie

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

{Control of Residential Load Management Networks Using Real Time Pricing  

E-Print Network (OSTI)

The interconnected smart grid promises many advantages toplays a key role in the smart grid’s ability to deliver onSimulation To ensure the smart grid truly is “smart” before

Burke, William Jerome

2010-01-01T23:59:59.000Z

382

Electromagnetic Detection and Real-Time DMLC Adaptation to Target Rotation During Radiotherapy  

SciTech Connect

Purpose: Intrafraction rotation of more than 45 Degree-Sign and 25 Degree-Sign has been observed for lung and prostate tumors, respectively. Such rotation is not routinely adapted to during current radiotherapy, which may compromise tumor dose coverage. The aim of the study was to investigate the geometric and dosimetric performance of an electromagnetically guided real-time dynamic multileaf collimator (DMLC) tracking system to adapt to intrafractional tumor rotation. Materials/Methods: Target rotation was provided by changing the treatment couch angle. The target rotation was measured by a research Calypso system integrated with a real-time DMLC tracking system employed on a Varian linac. The geometric beam-target rotational alignment difference was measured using electronic portal images. The dosimetric accuracy was quantified using a two-dimensional ion chamber array. For each beam, the following five delivery modes were tested: 1) nonrotated target (reference); 2) fixed rotated target with tracking; 3) fixed rotated target without tracking; 4) actively rotating target with tracking; and 5) actively rotating target without tracking. Dosimetric performance of the latter four modes was measured and compared to the reference dose distribution using a 3 mm/3% {gamma}-test. Results: Geometrically, the beam-target rotational alignment difference was 0.3 Degree-Sign {+-} 0.6 Degree-Sign for fixed rotation and 0.3 Degree-Sign {+-} 1.3 Degree-Sign for active rotation. Dosimetrically, the average failure rate for the {gamma}-test for a fixed rotated target was 11% with tracking and 36% without tracking. The average failure rate for an actively rotating target was 9% with tracking and 35% without tracking. Conclusions: For the first time, real-time target rotation has been accurately detected and adapted to during radiation delivery via DMLC tracking. The beam-target rotational alignment difference was mostly within 1 Degree-Sign . Dose distributions to fixed and actively rotating targets with DMLC tracking were significantly superior to those without tracking.

Wu Junqing [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); School of Health Sciences, Purdue University, West Lafayette, IN (United States); Ruan, Dan [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Cho, Byungchul [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Asan Medical Center, Seoul (Korea, Republic of); Sawant, Amit [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Petersen, Jay; Newell, Laurence J. [Calypso Medical Technologies, Seattle, WA (United States); Cattell, Herbert [Varian Medical Systems, Palo Alto, CA (United States); Keall, Paul J., E-mail: radphyslab@sydney.edu.au [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Radiation Physics Laboratory, Sydney Medical School, University of Sydney, Sydney (Australia)

2012-03-01T23:59:59.000Z

383

Molecular dynamics simulations and drug discovery  

E-Print Network (OSTI)

JE: On the determination of molecular fields. II. From thescalability for parallel molecular dynamics. J Comput PhysKale L, Schulten K: Scalable molecular dynamics with NAMD. J

Durrant, Jacob D; McCammon, J Andrew

2011-01-01T23:59:59.000Z

384

Real Time Location Tool For Precision Tracking Of Passive UHF RFID Tags In Two Dimensions.  

E-Print Network (OSTI)

??Bredow, Jonathan This thesis addresses this problem of a precise RTLS (Real Time Location System) by implementing a Passive UHF RFID system. A software is… (more)

Kenarangui, Nasir

2011-01-01T23:59:59.000Z

385

Method and Apparatus for In-Situ Real Time Characterization of ...  

Method and Apparatus for In-Situ Real Time Characterization of Energy Storage and Energy Conversion Devices Idaho National Laboratory. Contact INL ...

386

System level energy management in networked real-time embedded systems.  

E-Print Network (OSTI)

??Real-time embedded systems play a prominent role in a variety of applications ranging from medical sensors in human body to signaling sensors in war fields.… (more)

Gathala, Sudha Anil Kumar

2009-01-01T23:59:59.000Z

387

Search Method for Real-time Knowledge Discovery Modeled on the ...  

Search Method for Real-time Knowledge Discovery Modeled on the Human Brain Oak Ridge National Laboratory. Contact ORNL About This Technology

388

Following a Structural Phase Transition in Real Time with Atomic Spatial  

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

Following a Structural Phase Following a Structural Phase Transition in Real Time with Atmic Spatial Resolution Constructing atomic scale mechanisms for chemical, biological, and physical transformations of matter represents a critical goal for numerous scientific and technological challenges that face modern society. The natural length and time scale for atomic dynamics dictate that the scientific tools needed to construct these mechanisms possess Ångström (Å) spatial resolution with femtosecond (fs) temporal resolution. Ultrafast x-ray pulses provide the necessary spatial and temporal resolution, but generating sources intense enough for detailed structural studies has been a significant challenge. The Sub-Picosecond Pulse Source (SPPS) represents the first utilization of a linear electron accelerator to generate fs duration pulses of Å wavelength light for studying structural dynamics. The per pulse fluence at the SPPS exceeds that of all previous ultrafast hard x-ray sources by roughly two orders of magnitude,[1] allowing structural transformations to be investigated with unprecedented dynamical detail.

389

Exploiting hierarchical parallelisms for molecular dynamics simulation on multicore clusters  

Science Conference Proceedings (OSTI)

We have developed a scalable hierarchical parallelization scheme for molecular dynamics (MD) simulation on multicore clusters. The scheme explores multilevel parallelism combining: (1) Internode parallelism using spatial decomposition via message passing; ... Keywords: Molecular dynamics simulation, Multicore cluster, Scalable hierarchical parallelization scheme, Single instruction multiple data

Liu Peng; Manaschai Kunaseth; Hikmet Dursun; Ken-Ichi Nomura; Weiqiang Wang; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta

2011-07-01T23:59:59.000Z

390

Anton, a special-purpose machine for molecular dynamics simulation  

Science Conference Proceedings (OSTI)

The ability to perform long, accurate molecular dynamics (MD) simulations involving proteins and other biological macro-molecules could in principle provide answers to some of the most important currently outstanding questions in the fields of biology, ... Keywords: bioinformatics, biomolecular system simulation, computational biology, computational drug design, molecular dynamics, protein folding, protein structure, special-purpose machine

David E. Shaw; Martin M. Deneroff; Ron O. Dror; Jeffrey S. Kuskin; Richard H. Larson; John K. Salmon; Cliff Young; Brannon Batson; Kevin J. Bowers; Jack C. Chao; Michael P. Eastwood; Joseph Gagliardo; J. P. Grossman; C. Richard Ho; Douglas J. Ierardi; István Kolossváry; John L. Klepeis; Timothy Layman; Christine McLeavey; Mark A. Moraes; Rolf Mueller; Edward C. Priest; Yibing Shan; Jochen Spengler; Michael Theobald; Brian Towles; Stanley C. Wang

2007-06-01T23:59:59.000Z

391

Design of an Enterprise Dynamic Performance Simulation and Analysis System  

Science Conference Proceedings (OSTI)

Many problems in enterprise running faced by managers can be resolved by simulation of the corresponding system dynamics model. It is often desirable to forecasting enterprise running in the next period. And managers hope to find the reason quickly if ... Keywords: dynamic performance, simulation, sensitivity, diagnose, performance optimization

Zheng Li; Yueting Chai; Yi Liu

2011-04-01T23:59:59.000Z

392

FUTURE POWER GRID INITIATIVE Real-time High-Performance  

E-Print Network (OSTI)

mathematical models, next-generation simulation and analytics capabilities for the power November 2012 PNNL-SA-90011 Peter Hui Pacific Northwest National Laboratory (509) 372-6414 peter.hui@pnnl.gov ABOUT FPGI Infrastructure Operations Center (EIOC), the Pacific Northwest National Laboratory's (PNNL) national electric

393

Scalable Real Time Data Management for Smart Grid  

Science Conference Proceedings (OSTI)

This paper presents GridMW, a scalable and reliable data middleware for smart grids. Smart grids promise to improve the efficiency of power grid systems and reduce green house emissions through incorporating power generation from renewable sources and shaping demand to match the supply. As a result, power grid systems will become much more dynamic and require constant adjustments, which requires analysis and decision making applications to improve the efficiency and reliability of smart grid systems.

Yin, Jian; Kulkarni, Anand V.; Purohit, Sumit; Gorton, Ian; Akyol, Bora A.

2011-12-16T23:59:59.000Z

394

AVESTAR® - Natural Gas Combined Cycle (NGCC) Dynamic Simulator  

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

Natural Gas Combined Cycle (NGCC) Dynamic Simulator Natural Gas Combined Cycle (NGCC) Dynamic Simulator A simulator that can provide future engineers with realistic, hands-on experience for operating advanced natural gas combined cycle (NGCC) power plants will soon be available at an innovative U.S. Department of Energy training center. Under a new cooperative research and development agreement signed by the Office of Fossil Energy's National Energy Technology Laboratory (NETL) and Invensys Operations Management, the partners will develop, test, and deploy a dynamic simulator and operator training system (OTS) for a generic NGCC power plant equipped for use with post-combustion carbon capture. NETL will operate the new dynamic simulator/OTS at the AVESTAR (Advanced Virtual Energy Simulation Training and Research) Center in Morgantown, W.Va.

395

Simulation of chemical reaction dynamics on an NMR quantum computer  

E-Print Network (OSTI)

Quantum simulation can beat current classical computers with minimally a few tens of qubits and will likely become the first practical use of a quantum computer. One promising application of quantum simulation is to attack challenging quantum chemistry problems. Here we report an experimental demonstration that a small nuclear-magnetic-resonance (NMR) quantum computer is already able to simulate the dynamics of a prototype chemical reaction. The experimental results agree well with classical simulations. We conclude that the quantum simulation of chemical reaction dynamics not computable on current classical computers is feasible in the near future.

Dawei Lu; Nanyang Xu; Ruixue Xu; Hongwei Chen; Jiangbin Gong; Xinhua Peng; Jiangfeng Du

2011-05-21T23:59:59.000Z

396

A Cost Effective Real-Time Tracking System Prototype Using Integrated GPS/GPRS Module  

Science Conference Proceedings (OSTI)

This paper presents a real time tracking system that provides accurate localizations of the tracked vehicle with low cost. The system is implemented using GM862 cellular quad band module. A monitoring server and a graphical user interface on a website ... Keywords: GPS, GSM, ITS, Real Time Tracking

Wael El-Medany; Alauddin Al-Omary; Riyadh Al-Hakim; Sufyan Al-Irhayim; Mustafa Nusaif

2010-09-01T23:59:59.000Z

397

An optimal k-exclusion real-time locking protocol motivated by multi-GPU systems  

Science Conference Proceedings (OSTI)

Graphics processing units (GPUs) are becoming increasingly important in today's platforms as their growing generality allows for them to be used as powerful co-processors. In previous work, the authors showed that GPUs may be integrated into real-time ... Keywords: GPGPU, Global scheduling, Real-time systems, Semaphore protocols

Glenn A. Elliott; James H. Anderson

2013-03-01T23:59:59.000Z

398

Non-markovian analysis for model driven engineering of real-time software  

Science Conference Proceedings (OSTI)

Quantitative evaluation of models with stochastic timings can decisively support schedulability analysis and performance engineering of real-time concurrent systems. These tasks require modeling formalisms and solution techniques that can encompass stochastic ... Keywords: model driven development, non-markovian stochastic analysis, real-time systems, software performance engineering

Laura Carnevali; Marco Paolieri; Alessandro Santoni; Enrico Vicario

2013-04-01T23:59:59.000Z

399

Real-time observation of lithium fibers growth inside a nanoscale lithium-ion battery  

E-Print Network (OSTI)

Real-time observation of lithium fibers growth inside a nanoscale lithium-ion battery Hessam August 2011; accepted 29 August 2011; published online 22 September 2011) Formation of lithium dendrite to observe the real-time nucleation and growth of the lithium fibers inside a nanoscale Li-ion battery. Our

Endres. William J.

400

An Approach to Platform Independent Real-Time Programming: (2) Practical Application  

Science Conference Proceedings (OSTI)

In a previously published companion paper a method for extending programming languages with timing constructs was proposed. It was shown that the extension enables the construction of real-time programs that can be proven correct independently of ... Keywords: distributed systems, platform independence, real-time programming, scheduling

Jozef Hooman; Onno Van Roosmalen

2000-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Reactive and Real-Time Systems Course: How to Get the Most Out of it  

Science Conference Proceedings (OSTI)

The paper describes the syllabus and the students’ projects from a graduate course on the subject of “Reactive and Real-Time Systems”, taught at Tel-Aviv University and at the Open University of Israel. The course focuses on the development ... Keywords: course syllabus, reactive real-time systems, scheduling, synchronous languages, verification

Tal Lev-Ami; Shmuel S. Tyszberowicz

2003-09-01T23:59:59.000Z

402

A multiple camera system with real-time volume reconstruction for articulated skeleton pose tracking  

Science Conference Proceedings (OSTI)

We present a multi-camera system for recovering skeleton body pose, by performing real-time volume reconstruction and using a hierarchical stochastic pose search algorithm. Different from many multicamera systems that require a few connected workstations, ... Keywords: multi-camera system, pose estimation, real-time volume reconstruction

Zheng Zhang; Hock Soon Seah; Chee Kwang Quah; Alex Ong; Khalid Jabbar

2011-01-01T23:59:59.000Z

403

On compressing data in wireless sensor networks for energy efficiency and real time delivery  

Science Conference Proceedings (OSTI)

Wireless sensor networks possess significant limitations in storage, bandwidth, processing, and energy. Additionally, real-time sensor network applications such as monitoring poisonous gas leaks cannot tolerate high latency. While some good data compression ... Keywords: Compression, Latency, Real-time, Wireless sensor network

Tommy Szalapski; Sanjay Madria

2013-06-01T23:59:59.000Z

404

Robust and accurate global vision system for real time tracking of multiple mobile robots  

Science Conference Proceedings (OSTI)

This paper presents a new global vision system for tracking of multiple mobile robots. To the best knowledge of the authors it outperforms all existing global vision systems with respect to measurement precision and accuracy, high speed and real time ... Keywords: Global vision, Intelligent space, Multirobot systems, Real time object tracking, Robot soccer

Mišel Brezak; Ivan Petrovi?; Edouard Ivanjko

2008-03-01T23:59:59.000Z

405

Energy-Efficient Speed Scheduling for Real-Time Tasks under Thermal Constraints  

E-Print Network (OSTI)

Energy-Efficient Speed Scheduling for Real-Time Tasks under Thermal Constraints Shengquan Wang. We develop energy-efficient speed scheduling schemes for frame-based real-time tasks under thermal in order to achieve thermal-constrained energy-efficient design. However, this does not work. The existing

Wang, Shengquan

406

Hardware support in a middleware for distributed and real-time embedded applications  

Science Conference Proceedings (OSTI)

One of the main challenges in the development of tools and methodologies for a multiprocessor real-time embedded system is to reuse already developed software, but at the same time obtaining low memory footprint, low energy consumption, and minimal area, ... Keywords: MPSoCs, embedded applications, energy efficiency, middleware, real-time systems

Elias T. Silva, Jr; Flávio R. Wagner; Edison P. Freitas; Carlos E. Pereira

2006-08-01T23:59:59.000Z

407

Hard Real-Time Garbage Collection on Chip Multi-Processors  

E-Print Network (OSTI)

Hard Real-Time Garbage Collection on Chip Multi-Processors DISSERTATION submitted in partial are however not suited for use in hard real-time systems. As a failure in these systems can have catastrophic of the respective system. In the past few years, methods for garbage collection that are suitable for use in hard

408

A real-time shadow approach for an augmented reality application using shadow volumes  

Science Conference Proceedings (OSTI)

Shadows add a level of realism to a rendered image. Moreover, they are used as visual clues to determine spacial relationships and real-time shadows will gain importance in current real-time computer graphics applications for this reason. Twenty-five ... Keywords: augmented reality, shadow volumes

Michael Haller; Stephan Drab; Werner Hartmann

2003-10-01T23:59:59.000Z

409

Verifying Timing Constraints of Real-Time Systems by Means of Evolutionary Testing  

Science Conference Proceedings (OSTI)

Many industrial products are based on the use of embedded computer systems. Usually, these systems have to fulfil real-time requirements, and correct system functionality depends on their logical correctness as well as on their temporal correctness. ... Keywords: Real-time systems, evolutionary algorithm, evolutionary optimization, evolutionary testing, temporal behavior, temporal correctness , test strategy, testing, validation, verification

Joachim Wegener; Matthias Grochtmann

1998-11-01T23:59:59.000Z

410

A STEP-compliant computer numerical control based on real-time Ethernet for circuit boardmilling  

Science Conference Proceedings (OSTI)

With the globalisation of manufacturing industry, extendable and networked computer numerical control systems that can support bidirectional and seamless data exchange are in urgent need. This paper presents a STEP-NC compliant controller based on Real-time ... Keywords: Gerber, Real-time Ethernet RTE, STEP-NC, circuit board milling, computer numerical control CNC

Ke Wang; Riliang Liu; Xun Xu; Chenrui Zhang; Lin Yang

2012-12-01T23:59:59.000Z

411

The Fixed Priority Scheduling Problem for Energy Harvesting Real-Time Systems  

E-Print Network (OSTI)

The Fixed Priority Scheduling Problem for Energy Harvesting Real-Time Systems Younès Chandarli to establish a schedulability test for a fixed priority real-time scheduling problem with energy constraints problem for energy harvesting systems was the one of Mossé [1]. The problem was solved under a very

412

Eventrons: a safe programming construct for high-frequency hard real-time applications  

Science Conference Proceedings (OSTI)

While real-time garbage collection has achieved worst-case latencies on the order of a millisecond, this technology is approaching its practical limits. For tasks requiring extremely low latency, and especially periodic tasks with frequencies above 1 ... Keywords: allocation, real-time, scheduling

Daniel Spoonhower; Joshua Auerbach; David F. Bacon; Perry Cheng; David Grove

2006-06-01T23:59:59.000Z

413

Real-Time 2D NMR Identification of Analytes Undergoing Continuous Chromatographic Separation  

E-Print Network (OSTI)

Real-Time 2D NMR Identification of Analytes Undergoing Continuous Chromatographic Separation Boaz of multidimensional nuclear magnetic resonance (NMR) spectra within a single scan. A promising application opened up, with the real-time acquisition of a series of 2D 1 H NMR spectra arising from a mixture of compounds subject

Frydman, Lucio

414

Patterns for Automatic Generation of Soft Real-time System Models  

Science Conference Proceedings (OSTI)

Worst-case assumptions about the timing of systems are often too conservative when analyzing distributed soft real-time systems as they lead to over-dimensioned and expensive products. For these systems, a certain percentage of deadline misses is often ... Keywords: Modeling patterns, pattern-based system description, soft real-time systems, stochastic model

Oana Florescu; Jeroen Voeten; Bart Theelen; Henk Corporaal

2009-11-01T23:59:59.000Z

415

Molecular Dynamics Simulations of Thermoset Polymers for ...  

Science Conference Proceedings (OSTI)

Materials Genomics Past & Future: From CALPHAD to Flight · Modelling the Properties of Multi-Component Commercial Alloys · Molecular Dynamics ...

416

CERTS Review REAL-TIME PRICE FORECAST WITH BIG DATA A STATE SPACE APPROACH  

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

Review Review REAL-TIME PRICE FORECAST WITH BIG DATA A STATE SPACE APPROACH Lang Tong (PI), Robert J. Thomas, Yuting Ji, and Jinsub Kim School of Electrical and Computer Engineering, Cornell University Jie Mei, Georgia Institute of Technology August 7, 2013 CERTS Review DATA QUALITY AND ITS EFFECTS ON MARKET OPERATIONS DENY OF SERVICE ATTACK ON REAL-TIME ELECTRICITY MARKET COVER UP PROTECTION AGAINST TOPOLOGY ATTACK Lang Tong (PI), Robert J. Thomas, and Jinsub Kim Cornell University August 8, 2013 Project overview  Objectives  Accurate short-term probabilistic forecasting of real-time LMP.  Incorporate real-time measurements (e.g. SCADA/PMU).  Scalable computation techniques.  Summary of results  A real-time LMP model with forecasting and measurement

417

Wireless technology collects real-time information from oil and gas wells  

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

Wireless technology collects real-time information from oil and gas Wireless technology collects real-time information from oil and gas wells Wireless technology collects real-time information from oil and gas wells The patented system delivers continuous electromagnetic data on the reservoir conditions, enabling economical and effective monitoring and analysis. April 3, 2012 One of several active projects, LANL and Chevron co-developed INFICOMM(tm), a wireless technology used to collect real-time temperature and pressure information from sensors in oil and gas wells, including very deep wells already producing oil and gas and drilling operations for new wells. One of several active projects, LANL and Chevron co-developed INFICOMM(tm), a wireless technology used to collect real-time temperature and pressure information from sensors in oil and gas wells, including very deep wells

418

Neural-optimal control algorithm for real-time regulation of in-line storage in combined sewer systems  

Science Conference Proceedings (OSTI)

Attempts at implementing real-time control systems as a cost-effective means of minimizing the pollution impacts of untreated combined sewer overflows have largely been unsustained due to the complexity of the real-time control problem. Optimal real-time ... Keywords: Artificial intelligence, Combined sewers, Hydraulic sewer models, Neural networks, Optimal control, Real-time control, Urban stormwater management

Suseno Darsono; John W. Labadie

2007-09-01T23:59:59.000Z

419

Computer Simulations of Protein Dynamics and Thermodynamics  

Science Conference Proceedings (OSTI)

The computational challenges of producing realistic biomedical simulations are reviewed. Techniques for applying classical mechanics simulation methods to proteins and ways to solve Newton's equations are discussed. Two recent applications of these methods ...

David Case

1993-10-01T23:59:59.000Z

420

Composing and decomposing QoS attributes for distributed real-time systems: experience to date and hard problems going forward  

Science Conference Proceedings (OSTI)

Distributed real-time embedded (DRE) systems combine the stringent quality of service (QoS) requirements of embedded systems and the dynamic conditions of distributed systems. In these DRE systems, QoS requirements are often critical, and QoS must be ...

Richard Schantz; Joseph Loyall

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Development of a Modelling and Simulation Method Comparison and Selection Framework for Health Services Management  

E-Print Network (OSTI)

were car- ried out with local and national level health care man- agers to investigate their responses in depth. At the end of the project (after iterative revision of the tool), the national level health care manager at the NHS Institute of Innovation... and modelling in aerospace and the military Distributed Simulation, Discrete Event Simulation, System Dynamics, Real Time Simulation, Monte Carlo Simulation, Agent Based Simulation, War Gaming, Hybrid Simulation, Inverse Simulation, Petri-net, Markovian Model...

Jun, Gyuchan T; Morris, Zoe; Eldabi, Tillal; Harper, Paul; Naseer, Aisha; Patel, Brijesh; Clarkson, John P

2011-05-19T23:59:59.000Z

422

Real-time rotor bar current measurements using bluetooth technology for a brushless doubly-fed machine (BDFM  

E-Print Network (OSTI)

The Brushless Doubly Fed Machine (BDFM) shows economic promise as a variable speed drive or generator. The optimization of the machine and model-based control strategies both rely on machine models, and the experimental verification of these models. To date, dynamic measurements of rotor quantities have not been possible. The authors present a system of measuring rotor bar currents in real time using a Rogowski coil to detect the current and recently developed Bluetooth wireless technology to transmit the data from the moving rotor to a computer. Experimental data collected from the system are included. 1.

P. C. Roberts; E. Abdi Jalebi; R. A. Mcmahon; T. J. Flack

2004-01-01T23:59:59.000Z

423

SU?E?T?225: A Comprehensive Evaluation of Real?Time Motion Tracking of a Surface Imaging System for Lung Treatment  

Science Conference Proceedings (OSTI)

Purpose: Applicability of the AlignRT surfaceimaging system was extensively investigated for real?time motion tracking in radiation therapy of lungcancer.Methods: A 4D computer?controlled motion phantom was employed to simulate a human breathing motion. An anthropomorphic thoracic phantom (a coronal cross?sectional area: ?1

H Jin; Z Su

2012-01-01T23:59:59.000Z

424

Avestar® - Syngas-Fired Combined Cycle Dynamic Simulator  

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

Syngas-Fired Combined Cycle Dynamic Simulator Syngas-Fired Combined Cycle Dynamic Simulator The AVESTAR® center offers courses using the Combined Cycle Simulator, focusing on the power generation process after gasification. This simulator is well-suited for concentrated training on operation and control of the gas and steam turbines; condensate, feed water, and circulating water systems; heat recovery steam generator; and selective catalytic reduction (SCR) unit. Combined cycle simulator startup operations include bringing up the gas turbine to rated speed on natural gas and then switching over to the firing of synthesis gas. Key capabilities of the Combined Cycle Simulator include: Combined Cycle Simulator Operator training station HMI display for overview of Gas Turbine - Train A Normal base load operation

425

Simulated Convective Lines with Leading Precipitation. Part I: Governing Dynamics  

Science Conference Proceedings (OSTI)

This article, the first of two describing a study in which the authors used idealized numerical simulations to investigate convective lines with leading precipitation, addresses the dynamics governing the systems' structures and individual air ...

Matthew D. Parker; Richard H. Johnson

2004-07-01T23:59:59.000Z

426

Dynamical Effects of Aerosol Perturbations on Simulated Idealized Squall Lines  

Science Conference Proceedings (OSTI)

The dynamical effects of increased aerosol loading on the strength and structure of numerically simulated squall lines are explored. Results are explained in the context of RKW theory. Changes in aerosol loading lead to changes in rain drop size ...

Zachary J. Lebo; Hugh Morrison

427

Simulation of the dynamic response of a damped taught string  

E-Print Network (OSTI)

Marine pipeline are facing new issues involved by the increase of the depth of exploited oil and gas reservoirs. This thesis discusses the changes in the dynamic behavior of marine pipelines and proposes a simple simulation ...

Favennec, Hervé

2007-01-01T23:59:59.000Z

428

Molecular Dynamics Simulations of Vacancy and Oxygen Diffusion ...  

Science Conference Proceedings (OSTI)

A Tale of Two States and More: Modeling of New Generation of Lattice Stability from Zero ... Analysis of Nano Fluid Using CFD-A Hybrid Approach for Cooling Purpose ... Molecular Dynamics Simulations of Grain Boundary Free Energy and

429

Millisecond-scale molecular dynamics simulations on Anton  

Science Conference Proceedings (OSTI)

Anton is a recently completed special-purpose supercomputer designed for molecular dynamics (MD) simulations of biomolecular systems. The machine's specialized hardware dramatically increases the speed of MD calculations, making possible for the first ...

David E. Shaw; Ron O. Dror; John K. Salmon; J. P. Grossman; Kenneth M. Mackenzie; Joseph A. Bank; Cliff Young; Martin M. Deneroff; Brannon Batson; Kevin J. Bowers; Edmond Chow; Michael P. Eastwood; Douglas J. Ierardi; John L. Klepeis; Jeffrey S. Kuskin; Richard H. Larson; Kresten Lindorff-Larsen; Paul Maragakis; Mark A. Moraes; Stefano Piana; Yibing Shan; Brian Towles

2009-11-01T23:59:59.000Z

430

Anton, a special-purpose machine for molecular dynamics simulation  

Science Conference Proceedings (OSTI)

The ability to perform long, accurate molecular dynamics (MD) simulations involving proteins and other biological macro-molecules could in principle provide answers to some of the most important currently outstanding questions in the fields of biology, ...

David E. Shaw; Martin M. Deneroff; Ron O. Dror; Jeffrey S. Kuskin; Richard H. Larson; John K. Salmon; Cliff Young; Brannon Batson; Kevin J. Bowers; Jack C. Chao; Michael P. Eastwood; Joseph Gagliardo; J. P. Grossman; C. Richard Ho; Douglas J. Ierardi; István Kolossváry; John L. Klepeis; Timothy Layman; Christine McLeavey; Mark A. Moraes; Rolf Mueller; Edward C. Priest; Yibing Shan; Jochen Spengler; Michael Theobald; Brian Towles; Stanley C. Wang

2008-07-01T23:59:59.000Z

431

Physics issues in simulations with dynamical overlap fermions  

E-Print Network (OSTI)

We discuss the impact of various improvements on simulations of dynamical overlap fermions using the Hybrid Monte Carlo algorithm. We focus on the usage of fat links and multiple pseudo-fermion fields.

Thomas DeGrand; Stefan Schaefer

2004-12-01T23:59:59.000Z

432

Real Time Flame Monitoring of Gasifier and Injectors  

SciTech Connect

This project is a multistage effort with the final goal to develop a practical and reliable nonintrusive gasifier injector monitor to assess burner wear and need for replacement. The project team included the National Energy Technology Laboratory (NETL), Gas Technology Institute (GTI), North Carolina State University, and ConocoPhillips. This report presents the results of the sensor development and testing initially at GTI combustion laboratory with natural gas flames, then at the Canada Energy Technology Center (CANMET), Canada in the atmospheric coal combustor as well as in the pilot scale pressurized entrained flow gasifier, and finally the sensor capabilities were demonstrated at the Pratt and Whitney Rocketdyne (PWR) Gasifier and the Wabash River Repowering plant located in West Terre Haute, IN. The initial tests demonstrated that GTI gasifier sensor technology was capable of detecting shape and rich/lean properties of natural gas air/oxygen enriched air flames. The following testing at the Vertical Combustor Research Facility (VCRF) was a logical transition step from the atmospheric natural gas flames to pressurized coal gasification environment. The results of testing with atmospheric coal flames showed that light emitted by excited OH* and CH* radicals in coal/air flames can be detected and quantified. The maximum emission intensities of OH*, CH*, and black body (char combustion) occur at different axial positions along the flame length. Therefore, the excitation rates of CH* and OH* are distinct at different stages of coal combustion and can be utilized to identify and characterize processes which occur during coal combustion such as devolatilization, char heating and burning. To accomplish the goals set for Tasks 4 and 5, GTI utilized the CANMET Pressurized Entrained Flow Gasifier (PEFG). The testing parameters of the PEFG were selected to simulate optimum gasifier operation as well as gasifier conditions normally resulting from improper operation or failed gasifier injectors. The sensor developed under previous tasks was used to assess the spectroscopic characteristics of the gasifier flame. The obtained spectral data were successfully translated into flame temperature measurements. It was also demonstrated that the reduced spectral data could be very well correlated with very important gasification process parameters such as the air/fuel and water/fuel ratio. Any of these parameters (temperature, air/fuel, and water/fuel) is sufficient to assess burner wear; however, the tested sensor was capable of monitoring all three of them plus the flame shape as functions of burner wear. This will likely be a very powerful tool which should enable significant improvements in gasifier efficiency, reliability, and availability. The sensor technology was presented to the projectâ??s industrial partner (ConocoPhillips). The partner expressed its strong interest in continuing to participate in the field validation phase of GTI's Flame Monitor Project. Finally the sensor was tested in the PWR (Pratt & Whitney Rocketdyne) gasification plant located at GTIâ??s research campus and at the ConocoPhillips industrial scale gasifier at Wabash River Indiana. The field trials of the GTI Gasifier sensor modified to withstand high temperature and pressure corrosive atmosphere of the industrial entrain flow gasifier. The project team successfully demonstrated the Gasifier Sensor system ability to monitor gasifier interior temperature maintaining unobstructed optical access for in excess of six week without any maintenance. The sensor examination upon completion of the trial revealed that the system did not sustain any damage and required minor cleanup of the optics.

Zelepouga, Serguei; Saveliev, Alexei

2011-12-31T23:59:59.000Z

433

Large-Scale Hybrid Dynamic Simulation Employing Field Measurements  

Science Conference Proceedings (OSTI)

Simulation and measurements are two primary ways for power engineers to gain understanding of system behaviors and thus accomplish tasks in system planning and operation. Many well-developed simulation tools are available in today's market. On the other hand, large amount of measured data can be obtained from traditional SCADA systems and currently fast growing phasor networks. However, simulation and measurement are still two separate worlds. There is a need to combine the advantages of simulation and measurements. In view of this, this paper proposes the concept of hybrid dynamic simulation which opens up traditional simulation by providing entries for measurements. A method is presented to implement hybrid simulation with PSLF/PSDS. Test studies show the validity of the proposed hybrid simulation method. Applications of such hybrid simulation include system event playback, model validation, and software validation.

Huang, Zhenyu; Guttromson, Ross T.; Hauer, John F.

2004-06-30T23:59:59.000Z

434

Real-time observation of fluctuations at the driven-dissipative Dicke phase transition  

E-Print Network (OSTI)

We experimentally study the influence of dissipation on the driven Dicke quantum phase transition, realized by coupling external degrees of freedom of a Bose-Einstein condensate to the light field of a high-finesse optical cavity. The cavity provides a natural dissipation channel, which gives rise to vacuum-induced fluctuations and allows us to observe density fluctuations of the gas in real-time. We monitor the divergence of these fluctuations over two orders of magnitude while approaching the phase transition and observe a behavior which significantly deviates from that expected for a closed system. A correlation analysis of the fluctuations reveals the diverging time scale of the atomic dynamics and allows us to extract a damping rate for the external degree of freedom of the atoms. We find good agreement with our theoretical model including both dissipation via the cavity field and via the atomic field. Utilizing a dissipation channel to non-destructively gain information about a quantum many-body system provides a unique path to study the physics of driven-dissipative systems.

Ferdinand Brennecke; Rafael Mottl; Kristian Baumann; Renate Landig; Tobias Donner; Tilman Esslinger

2013-04-17T23:59:59.000Z

435

Real-time studies of battery electrochemical reactions inside a transmission electron microscope.  

DOE Green Energy (OSTI)

We report the development of new experimental capabilities and ab initio modeling for real-time studies of Li-ion battery electrochemical reactions. We developed three capabilities for in-situ transmission electron microscopy (TEM) studies: a capability that uses a nanomanipulator inside the TEM to assemble electrochemical cells with ionic liquid or solid state electrolytes, a capability that uses on-chip assembly of battery components on to TEM-compatible multi-electrode arrays, and a capability that uses a TEM-compatible sealed electrochemical cell that we developed for performing in-situ TEM using volatile battery electrolytes. These capabilities were used to understand lithiation mechanisms in nanoscale battery materials, including SnO{sub 2}, Si, Ge, Al, ZnO, and MnO{sub 2}. The modeling approaches used ab initio molecular dynamics to understand early stages of ethylene carbonate reduction on lithiated-graphite and lithium surfaces and constrained density functional theory to understand ethylene carbonate reduction on passivated electrode surfaces.

Leung, Kevin; Hudak, Nicholas S.; Liu, Yang; Liu, Xiaohua H.; Fan, Hongyou; Subramanian, Arunkumar; Shaw, Michael J.; Sullivan, John Patrick; Huang, Jian Yu

2012-01-01T23:59:59.000Z

436

Value of Probabilistic Weather Forecasts: Assessment by Real-Time Optimization of Irrigation Scheduling  

SciTech Connect

This paper presents a modeling framework for real-time decision support for irrigation scheduling using the National Oceanic and Atmospheric Administration's (NOAA's) probabilistic rainfall forecasts. The forecasts and their probability distributions are incorporated into a simulation-optimization modeling framework. In this study, modeling irrigation is determined by a stochastic optimization program based on the simulated soil moisture and crop water-stress status and the forecasted rainfall for the next 1-7 days. The modeling framework is applied to irrigated corn in Mason County, Illinois. It is found that there is ample potential to improve current farmers practices by simply using the proposed simulation-optimization framework, which uses the present soil moisture and crop evapotranspiration information even without any forecasts. It is found that the values of the forecasts vary across dry, normal, and wet years. More significant economic gains are found in normal and wet years than in dry years under the various forecast horizons. To mitigate drought effect on crop yield through irrigation, medium- or long-term climate predictions likely play a more important role than short-term forecasts. NOAA's imperfect 1-week forecast is still valuable in terms of both profit gain and water saving. Compared with the no-rain forecast case, the short-term imperfect forecasts could lead to additional 2.4-8.5% gain in profit and 11.0-26.9% water saving. However, the performance of the imperfect forecast is only slightly better than the ensemble weather forecast based on historical data and slightly inferior to the perfect forecast. It seems that the 1-week forecast horizon is too limited to evaluate the role of the various forecast scenarios for irrigation scheduling, which is actually a seasonal decision issue. For irrigation scheduling, both the forecast quality and the length of forecast time horizon matter. Thus, longer forecasts might be necessary to evaluate the role of forecasts for irrigation scheduling in a more effective way.

Cai, Ximing; Hejazi, Mohamad I.; Wang, Dingbao

2011-09-29T23:59:59.000Z

437

Better HMC integrators for dynamical simulations  

SciTech Connect

We show how to improve the molecular dynamics step of Hybrid Monte Carlo, both by tuning the integrator using Poisson brackets measurements and by the use of force gradient integrators. We present results for moderate lattice sizes.

M.A. Clark, Balint Joo, A.D. Kennedy, P.J. Silva

2010-06-01T23:59:59.000Z

438

Dynamic electrothermal simulation of integrated resistors at device level  

Science Conference Proceedings (OSTI)

This paper presents the dynamic electrothermal simulation of a rectangular resistor integrated on a semi-conductor substrate. Due to the temperature dependence of the electrical conductivity of the resistive sheet, self-heating provokes a coupling between ... Keywords: Electrothermal simulation, Nonlinearity, Structure functions, Thermal impedance, Transient

B. Vermeersch; G. De Mey

2009-09-01T23:59:59.000Z

439

Steps to Establish a Real-Time Transmission Monitoring System for  

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

Steps to Establish a Real-Time Transmission Monitoring System for Steps to Establish a Real-Time Transmission Monitoring System for Transmission Owners and Operators within the Eastern and Western Interconnections Steps to Establish a Real-Time Transmission Monitoring System for Transmission Owners and Operators within the Eastern and Western Interconnections Steps to establish a real-time transmission monitoring system for transmission owners and operators within the Eastern and Western interconnections: a report to congress pursuant to section 1839 of the Energy Policy Act of 2005. Section 1839 of the Energy Policy Act of 2005 (EPAct 2005) directs the Secretary of Energy (DOE) and the Federal Energy Regulatory Commission (Commission) to study and report to Congress on the steps that must be taken to establish a system to make available to all transmission owners

440

Deployment of Demand Response as a Real-Time Resource in Organized Markets  

Open Energy Info (EERE)

Deployment of Demand Response as a Real-Time Resource in Organized Markets Deployment of Demand Response as a Real-Time Resource in Organized Markets Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Deployment of Demand Response as a Real-Time Resource in Organized Markets Focus Area: Crosscutting Topics: Potentials & Scenarios Website: www.sciencedirect.com/science/article/pii/S1040619008000973 Equivalent URI: cleanenergysolutions.org/content/deployment-demand-response-real-time- 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: Resource Integration Planning This article examines the use of demand response as a dispatchable resource

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

NREL: MIDC/NWTC M2 Real-Time Weather Display  

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

NWTC M2 Real-Time Weather Display This page should automatically refresh every minute. A text based weather display for PDAs is also available. NREL MIDC NWTC M2...

442

A Real-Time Scheme for the Prediction of Forecast Skill  

Science Conference Proceedings (OSTI)

During the winter of 1988/89, a real-time experimental scheme to predict skill of the ECMWF operational forecast was devised. The scheme was based on statistical relations between skill scores (the predictands) and a number of predictors ...

Franco Molteni; T. N. Palmer

1991-04-01T23:59:59.000Z

443

Real-Time Variational Assimilation of Hydrologic and Hydrometeorological Data into Operational Hydrologic Forecasting  

Science Conference Proceedings (OSTI)

Variational assimilation (VAR) of hydrologic and hydrometeorological data into operational hydrologic forecasting is explored. The data assimilated are the hourly real-time observations of streamflow and precipitation, and climatological ...

Dong-Jun Seo; Victor Koren; Neftali Cajina

2003-06-01T23:59:59.000Z

444

Real-time network traffic prediction based on a multiscale decomposition  

Science Conference Proceedings (OSTI)

The presence of the complex scaling behavior in network traffic makes accurate forecasting of the traffic a challenging task. In this paper we propose a multiscale decomposition approach to real time traffic prediction. The raw traffic data is first ...

Guoqiang Mao

2005-04-01T23:59:59.000Z

445

Captured motion data processing for real time synthesis of sign language  

Science Conference Proceedings (OSTI)

This study proposes a roadmap for the creation and specification of a virtual humanoid capable of performing expressive gestures in real time. We present a gesture motion data acquisition protocol capable of handling the main articulators involved in ...

Alexis Heloir; Sylvie Gibet; Franck Multon; Nicolas Courty

2005-05-01T23:59:59.000Z

446

Energy-Efficient, Utility Accrual Real-Time Scheduling Under the Unimodal Arbitrary Arrival Model  

Science Conference Proceedings (OSTI)

We present an energy-efficient real-time scheduling algorithm called EUA*, for the unimodal arbitrary arrival model (or UAM). UAM embodies a "stronger" adversary than most arrival models. The algorithm considers application activities that are subject ...

Haisang Wu; Binoy Ravindran; E. Douglas Jensen

2005-03-01T23:59:59.000Z

447

Dual-Regression Retrieval Algorithm for Real-Time Processing of Satellite Ultraspectral Radiances  

Science Conference Proceedings (OSTI)

A fast physically based dual-regression (DR) method is developed to produce, in real time, accurate profile and surface- and cloud-property retrievals from satellite ultraspectral radiances observed for both clear- and cloudy-sky conditions. The ...

William L. Smith Sr.; Elisabeth Weisz; Stanislav V. Kireev; Daniel K. Zhou; Zhenglong Li; Eva E. Borbas

2012-08-01T23:59:59.000Z

448

Real-Time Forecasting of the Western Australian Summertime Trough: Evaluation of a New Regional Model  

Science Conference Proceedings (OSTI)

The real-time prediction of the location, strength, and structure of the summertime heat trough is a major forecasting problem over Western Australia. Maximum temperatures, wind strength and direction along the west coast, low-level coastal cloud,...

Lance M. Leslie; Terry C. L. Skinner

1994-09-01T23:59:59.000Z

449

A non-intrusive fault tolerant framework for mission critical real-time systems  

E-Print Network (OSTI)

The need for dependable real-time systems for embedded application is growing, and, at the same time, so does the amount of functionality required from these systems. As testing can only show the presence of errors, not ...

Gorelov, Sébastien

2005-01-01T23:59:59.000Z

450

Examination of a Real-Time 3DVAR Analysis System in the Hazardous Weather Testbed  

Science Conference Proceedings (OSTI)

Forecasters and research meteorologists tested a real-time three-dimensional variational data assimilation (3DVAR) system in the Hazardous Weather Testbed during the springs of 2010-2012 to determine its capabilities to assist in the warning ...

Travis M. Smith; Jidong Gao; Kristin M. Calhoun; David J. Stensrud; Kevin L. Manross; Kiel L. Ortega; Chenghao Fu; Darrel M. Kingfield; Kimberly L. Elmore; Valliappa Lakshmanan; Christopher Riedel

451

Binary Segmentation of Video Sequences in Real Time Francisco J. HernandezLopez and Mariano Rivera  

E-Print Network (OSTI)

Binary Segmentation of Video Sequences in Real Time Francisco J. Hernandez­Lopez and Mariano Rivera [8, 9]. Francisco Hernandez-Lopez and Mariano Rivera, Binary Segmentation of Video Sequences in Real

Rivera, Mariano

452

NOAA's nowCOAST Web Mapping Portal to Near-Real-Time Coastal...  

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

NOAA's nowCOAST Web Mapping Portal to Near-Real-Time Coastal Information Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov ...

453

Real-Time Ocean Wind Vector Retrieval from Marine Radar Image Sequences Acquired at Grazing Angle  

Science Conference Proceedings (OSTI)

This paper proposes a novel algorithm for retrieving the ocean wind vector from marine radar image sequences in real time. It is presented as an alternative to mitigate anemometer problems, such as blockage, shadowing, and turbulence. Since wind ...

Raul Vicen-Bueno; Jochen Horstmann; Eric Terril; Tony de Paolo; Jens Dannenberg

2013-01-01T23:59:59.000Z

454

Quasi-parallel network applications in real-time distribution management system  

Science Conference Proceedings (OSTI)

In modern distribution management systems (DMSs), the real-time calculation of the network's state plays an important role for the operation of the network. High sophisticated algorithms for the estimation and calculation of the system's ...

Izudin Dzafic; Hans-Theo Neisius

2012-03-01T23:59:59.000Z

455

System for remote multichannel real-time monitoring of mouse ECG via the Internet  

E-Print Network (OSTI)

A hardware/software system was developed to allow real-time monitoring of multiple physiological signals simultaneously via the Internet. The hardware is specifically designed for measuring ECG signals from mice, while the ...

Oefinger, Matthew Blake, 1976-

2003-01-01T23:59:59.000Z

456

Real-Time Multimodel Superensemble Forecasts of Atlantic Tropical Systems of 1999  

Science Conference Proceedings (OSTI)

In this paper, Atlantic hurricane forecasts for the year 1999 are addressed. The methodology for these forecasts is called the multimodel superensemble. This statistical method makes use of the real-time forecasts provided by a number of ...

C. Eric Williford; T. N. Krishnamurti; Ricardo Correa Torres; Steven Cocke; Zaphiris Christidis; T. S. Vijaya Kumar

2003-08-01T23:59:59.000Z

457

Development of a Real-Time Interactive Storm-Monitoring Program in Phoenix, Arizona  

Science Conference Proceedings (OSTI)

The Arizona Thunderstorm Chase (AZTC) program, a cooperative project between the National Weather Service (NWS) in Phoenix and Arizona State University (ASU), uses trained ASU students as mobile observers with real-time communications ability to ...

Randall S. Cerveny; Steven M. Calderon; Michael W. Franjevic; Norman C. Hoffmann

1992-06-01T23:59:59.000Z

458

Real-Time Prediction of the Lake Breeze on the Western Shore of Lake Michigan  

Science Conference Proceedings (OSTI)

A forecast verification study of the occurrence and inland penetration of the lake breeze on the western shore of Lake Michigan was conducted. A real-time version of The Pennsylvania State University–National Center for Atmospheric Research fifth-...

Paul J. Roebber; Mark G. Gehring

2000-06-01T23:59:59.000Z

459

Real-Time Loop Scheduling with Energy Optimization Via DVS and ...  

Science Conference Proceedings (OSTI)

Real-Time Loop Scheduling with Energy. Optimization Via DVS and ABB for Multi -core. Embedded System. Guochen Hua1, Meng Wang1, Zili Shao1, Hui Liu2, ...

460

Experimental measurements and design guidelines for real-time software encryption in multimedia wireless LANs  

Science Conference Proceedings (OSTI)

To secure interactive multimedia applications in wireless LANs (WLANs), it is pertinent to implement real time cryptographic services. In this paper we evaluate the use of software based encryption algorithms that are implemented in the ...

Aura Ganz; Se Hyun Park; Zvi Ganz

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" 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

Real-time Expression Cloning using Appearance Models Barry-John Theobald  

E-Print Network (OSTI)

expressions to be transferred and rendered in real-time. 3) The mapped expression can be constrained to have of a complex interaction between various anatomical layers, which include bone, muscle, sub- cutaneous fat

Theobald, Barry-John

462

Real-Time Operational Forecasting on Shipboard of the Iceland-Faeroe Frontal Variability  

Science Conference Proceedings (OSTI)

Real-time operational shipboard forecasts of Iceland-Faeroe frontal variability were executed for the first time with a primitive equation mode. High quality, intensive hydrographic surveys during August 1993 were used for initialization, ...

A. R. Robinson; H. G. Arango; W. G. Leslie; A. J. Miller; A. Warn-Varnas; P-M. Poulain

1996-02-01T23:59:59.000Z

463

Real-Time Correction of Spatially Nonuniform Bias in Radar Rainfall Data Using Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

A procedure for real-time correction of spatially nonuniform bias in radar rainfall data using rain gauge measurements is described. Developed to complement the existing gauge-based bias correction procedures used in the National Weather Service (...

Dong-Jun Seo; J. P. Breidenbach

2002-04-01T23:59:59.000Z

464

Use of a Real-Time Computer Graphics System in Analysis and Forecasting  

Science Conference Proceedings (OSTI)

Real-time computer graphics systems are being introduced into weather stations throughout the United States. A sample of student forecasters used such a system to solve specific specialized forecasting problems. Results suggest that for some ...

John J. Cahir; John M. Norman; Dale A. Lowry

1981-03-01T23:59:59.000Z

465

Real-Time Airborne Analysis of Aircraft Data Supporting Operational Hurricane Forecasting  

Science Conference Proceedings (OSTI)

The Hurricane Research Division has developed a technique for real-time airborne analysis of aircraft data from reconnaissance and research flights in tropical cyclones. The technique uses an onboard workstation that analyzes flight-level ...

Joseph S. Griffin; Robert W. Burpee; Frank D. Marks Jr.; James L. Franklin

1992-09-01T23:59:59.000Z

466

Real-time timbral organisation: Selecting samples based upon similarity1  

Science Conference Proceedings (OSTI)

A comparison is made between two systems of real-time sample selection using timbral proximity that has relevance for live performance. Sound files in large sample libraries are analysed for audio features (amplitude RMS, spectral centroid, spectral ...

Arne Eigenfeldt; Philippe Pasquier

2010-08-01T23:59:59.000Z

467

Real-time programming and the big ideas of computational literacy  

E-Print Network (OSTI)

Though notoriously difficult, real-time programming offers children a rich new set of applications, and the opportunity to engage bodily knowledge and experience more centrally in intellectual enterprises. Moreover, the ...

Hancock, Christopher Michael, 1961-

2003-01-01T23:59:59.000Z

468

Real-Time Monitoring and Prediction of Modes of Coherent Synoptic to Intraseasonal Tropical Variability  

Science Conference Proceedings (OSTI)

A technique of near-real-time monitoring and prediction of various modes of coherent synoptic to intraseasonal zonally propagating tropical variability is developed. It involves Fourier filtering of a daily updated global dataset for the specific ...

Matthew Wheeler; Klaus M. Weickmann

2001-11-01T23:59:59.000Z

469

Improving energy saving in hard real time systems via a modified dual priority scheduling  

Science Conference Proceedings (OSTI)

In this paper, we present a modification of the Dual Priority scheduling algorithm, for hard real-time systems, that takes advantage of its performance to efficiently improve energy saving. The approach exploit the priority scheme to lengthen the runtime ...

M. Angels Moncusi; Alex Arenas; Jesus Labarta

2001-12-01T23:59:59.000Z

470

Real-Time Water Vapor Maps from a GPS Surface Network: Construction, Validation, and Applications  

Science Conference Proceedings (OSTI)

In this paper the construction of real-time integrated water vapor (IWV) maps from a surface network of global positioning system (GPS) receivers is presented. The IWV maps are constructed using a two-dimensional variational technique with a ...

Siebren de Haan; Iwan Holleman; Albert A. M. Holtslag

2009-07-01T23:59:59.000Z

471

Catching fish in the stream: real time analysis of audience behavior in social media  

Science Conference Proceedings (OSTI)

In this interactive poster, we describe a system we designed for identifying and tracking the behavior of distinct audiences in social media streams. Keywords: audience behavior, real-time analysis, social media

Yu-Ru Lin; Drew Margolin; Brian Keegan; Mauro Martino; Sasha Goodman; David Lazer

2013-02-01T23:59:59.000Z

472

Real-Time Bias Reduction for Satellite-Based Precipitation Estimates  

Science Conference Proceedings (OSTI)

A new approach to reduce biases in satellite-based estimates in real time is proposed and tested in this study. Currently satellite-based precipitation estimates exhibit considerable biases, and there have been many efforts to reduce these biases ...

Yudong Tian; Christa D. Peters-Lidard; John B. Eylander

2010-12-01T23:59:59.000Z

473

A Real-Time Hurricane Surface Wind Forecasting Model: Formulation and Verification  

Science Conference Proceedings (OSTI)

A real-time hurricane wind forecast model is developed by 1) incorporating an asymmetric effect into the Holland hurricane wind model; 2) using the National Oceanic and Atmospheric Administration (NOAA)/National Hurricane Center’s (NHC) hurricane ...

Lian Xie; Shaowu Bao; Leonard J. Pietrafesa; Kristen Foley; Montserrat Fuentes

2006-05-01T23:59:59.000Z

474

Search Method for Real-time Knowledge Discovery Modeled on the ...  

ORNL 2011-G00262/jcn UT-B ID 200601732 08.2011 Search Method for Real-time Knowledge Discovery Modeled on the Human Brain Technology Summary A new ...

475

Real-time quantitative PCR for enteric adenovirus serotype 40 in environmental waters  

E-Print Network (OSTI)

adenovirus detection by PCR as an index of human viruses.polluted waters by nested PCR amplification. Appl. Environ.real-time quantitative PCR. J. Clin. Microbiol. Wigand, R. ,

Jiang, Sunny C; Dezfulian, H; Chu, W P

2005-01-01T23:59:59.000Z

476

Integer programming-based real-time scheduler in semiconductor manufacturing  

Science Conference Proceedings (OSTI)

This paper demonstrates how an integer programming-based real-time scheduling heuristic approach can be applied for semiconductor manufacturing. Two integer programming formulations of a simplified version of this problem are proposed to model (1) a ...

Myoungsoo Ham; Young Hoon Lee; John W. Fowler

2009-12-01T23:59:59.000Z

477

Beyond kWh and kW demand: Understanding the new real-time electric...  

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

Beyond kWh and kW demand: Understanding the new real-time electric power measurement system in LBNL Building 90 Speaker(s): Alex McEachern Date: January 14, 2010 - 12:00pm...

478

May 21, 2011 - Getting Useful Real Time Feedback About Your Program Webinar (text version)  

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

1, 2011 - Getting Useful Real Time Feedback About 1, 2011 - Getting Useful Real Time Feedback About Your Program Webinar (text version) Below is the text version of the Webinar titled "Getting Useful Real Time Feedback About Your Program" originally presented on May 21, 2011. (Please note: portions of the transcript below may be incomplete where indicated with an underlined placeholder space. Please refer to the webinar presentation recording and slides for additional information.) Operator: The broadcast is now starting. All attendees are listen only mode. Sargon de Jesus: Good afternoon. My name is Sargon de Jesus and I am with ERG, a contractor supporting the U.S. Department of Energy Better Buildings program. I wanna thank you for joining today's webinar titled "Getting useful real time feedback about your

479

Improving RUC-1 Wind Estimates by Incorporating Near-Real-Time Aircraft Reports  

Science Conference Proceedings (OSTI)

A verification study of wind accuracy is presented for wind nowcasts generated by augmenting Rapid Update Cycle (RUC) wind forecasts with near-real-time aircraft reports using the Integrated Terminal Weather System (ITWS) gridded winds algorithm. ...

Rodney E. Cole; Steve M. Green; Matt R. Jardin

2000-08-01T23:59:59.000Z

480

A Real-Time Climate Information System for the Midwestern United States  

Science Conference Proceedings (OSTI)

The Midwestern Climate Information System (MICIS) is a near real-time system which provides access to a wide variety of climate information products. These include current temperature and precipitation data for several hundred midwestern United ...

Kenneth E. Kunkel; Stanley A. Changnon; Carl G. Lonnquist; James R. Angel

1990-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "real-time dynamic simulation" from the National Library of EnergyBeta (NLEBeta).
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481

Atmospheric Release Advisory Capability: Real-Time Modeling of Airborne Hazardous Materials  

Science Conference Proceedings (OSTI)

The Atmospheric Release Advisory Capability (ARAC) at Lawrence Livermore National Laboratory is a centralized federal project for assessing atmospheric releases of hazardous materials in real time. Since ARAC began making assessments in 1974, the ...

Thomas J. Sullivan; James S. Ellis; Connee S. Foster; Kevin T. Foster; Ronald L. Baskett; John S. Nasstrom; Walter W. Schalk III

1993-12-01T23:59:59.000Z

482

Real-Time Hazard Approximation of Long-Lasting Convective Storms Using Emergency Data  

Science Conference Proceedings (OSTI)

Convective storms cause several types of damage, including economic and ecological losses, every year. This paper focuses on an automatic hazard-level determination of convective storms based on a largely unused information source: real-time ...

Pekka J. Rossi; Vesa Hasu; Kalle Halmevaara; Antti Mäkelä; Jarmo Koistinen; Heikki Pohjola

2013-03-01T23:59:59.000Z

483

An Operational Real-Time Ocean Sensor Network in the Gulf of Maine  

Science Conference Proceedings (OSTI)

The Gulf of Maine Ocean Observing System (GoMOOS) was established in the summer of 2001 as a prototype real-time observing system that now includes eleven solar-powered buoys with physical and optical sensors, four shore-based long-range HF radar surface ... Keywords: CODAR, GoMOOS, Gulf of Maine, Ocean Observing Systems, Sensor networks, neural networks, ocean optics, real-time

Neal R. Pettigrew; Collin S. Roesler; Francois Neville; Heather E. Deese

2008-03-01T23:59:59.000Z

484

An abductive expert system for interpretation of real-time data  

SciTech Connect

This paper describes DINT, a data interpretation expert system which can provide an explanation of the real-time operating state of a substation to its operators. DINT is based on a generalized version of the set covering model for diagnostic problem solving. This abductive reasoning model is an object-based, frame-like knowledge representation paradigm. Test cases illustrate the application of the model to the real-time operation of a substation.

Dabbaghchi, I.; Gursky, R.J. (American Electric Power Service Corp., Columbus, OH (United States))

1993-07-01T23:59:59.000Z

485

Fine grain pipeline systems for real-time motion and stereo-vision computation  

Science Conference Proceedings (OSTI)

Image processing systems require high computational load that motivates the design of specific hardware architectures in order to arrive at real-time platforms. We adopt innovative design techniques based on the intensive utilisation of the inherent ... Keywords: FPGAs, algorithm parallelisation, cognitive vision models, customised architectures, data flow architectures, field programmable gate arrays, fine-grain pipelining, high performance architectures, image processing, on-chip integration, optical flow, pipelined techniques, real-time motion, reconfigurable hardware, stereo vision, superscalar units

Javier Diaz; Eduardo Ros; Alberto Prieto; Francisco J. Pelayo

2007-04-01T23:59:59.000Z

486

Real-Time Per-Cycle Energy Consumption Measurement of Digital Systems  

E-Print Network (OSTI)

This technical report introduces a real-time per-clock-cycle energy measurement technique for power analysis and reduction of synchronous state machines. This technique guarantees accuracy with a sampling rate of twice the clock frequency under spiky current draw common in digital systems. In addition, it acquires the energy consumption profile in real-time, thus, not requiring repeated operation of the target system.

Naehyuck Chang; Kwanho Kim

2000-01-01T23:59:59.000Z

487

Flow control techniques for real-time media applications in best-effort networks using fluid models  

E-Print Network (OSTI)

Quality of Service (QoS) in real-time media applications is an area of current interest because of the increasing demand for audio/video, and generally multimedia applications, over best effort networks, such as the Internet. Media applications are transported using the User Datagram Protocol (UDP) and tend to use a disproportionate amount of network bandwidth as they do not perform congestion or flow control. Methods for application QoS control are desirable to enable users to perceive a consistent media quality. This can be accomplished by either modifying current protocols at the transport layer or by implementing new control algorithms at the application layer irrespective of the protocol used at the transport layer. The objective of this research is to improve the QoS delivered to end-users in real-time applications transported over best-effort packet-switched networks. This is accomplished using UDP at the transport layer, along with adaptive predictive and reactive control at the application layer. An end-to-end fluid model is used, including the source buffer, the network and the destination buffer. Traditional control techniques, along with more advanced adaptive predictive control methods, are considered in order to provide the desirable QoS and make a best-effort network an attractive channel for interactive multimedia applications. The effectiveness of the control methods, is examined using a Simulink-based fluid-level simulator in combination with trace files extracted from the well-known network simulator ns-2. The results show that improvement in real-time applications transported over best-effort networks using unreliable transport protocols, such as UDP, is feasible. The improvement in QoS is reflected in the reduction of flow loss at the expense of flow dead-time increase or playback disruptions or both.

Konstantinou, Apostolos

2004-08-01T23:59:59.000Z

488

Phase-field Simulations/Molecular Dynamics  

Science Conference Proceedings (OSTI)

The sharp interface model was used to determine the SLI free energy and its anisotropy by fitting to the MD data. Finally, the MD simulation of the B2 growth ...

489

Programmable quantum simulation by dynamic Hamiltonian engineering  

E-Print Network (OSTI)

Quantum simulation is a promising near term application for mesoscale quantum information processors, with the potential to solve computationally intractable problems at the scale of just a few dozen interacting quantum systems. Recent experiments in a range of technical platforms have demonstrated the basic functionality of quantum simulation applied to quantum magnetism, quantum phase transitions, and relativistic quantum mechanics. In all cases, the underlying hardware platforms restrict the achievable inter-particle interaction, forming a serious constraint on the ability to realize a versatile, programmable, quantum simulator. In this work, we address this problem by developing novel sequences of unitary operations that engineer desired effective Hamiltonians in the time-domain. The result is a hybrid programmable analog simulator permitting a broad class of interacting spin-lattice models to be generated starting only with an arbitrary native inter-particle interaction and single-qubit addressing. Building on previous work proving that universal simulation is possible using both entangling gates and single-qubit unitaries, we show how determining the relevant hardware "program" of unitary pulses to implement an arbitrary spin Hamiltonian on such a simulator can be formulated as a linear program that runs in polynomial time and scales efficiently in hardware resources. Our analysis extends from circuit model quantum information to adiabatic quantum evolutions, where our approach allows for the creation of non-native ground state solutions to a computation.

David L. Hayes; Steven T. Flammia; Michael J. Biercuk

2013-09-26T23:59:59.000Z

490

A Comprehensive Statistically-Based Method to Interpret Real-Time Flowing Measurements  

DOE Green Energy (OSTI)

This project is motivated by the increasing use of distributed temperature sensors for real-time monitoring of complex wells (horizontal, multilateral and multi-branching wells) to infer the profiles of oil, gas, and water entry. Measured information can be used to interpret flow profiles along the wellbore including junction and build section. In this second project year, we have completed a forward model to predict temperature and pressure profiles in complex wells. As a comprehensive temperature model, we have developed an analytical reservoir flow model which takes into account Joule-Thomson effects in the near well vicinity and multiphase non-isothermal producing wellbore model, and couples those models accounting mass and heat transfer between them. For further inferences such as water coning or gas evaporation, we will need a numerical non-isothermal reservoir simulator, and unlike existing (thermal recovery, geothermal) simulators, it should capture subtle temperature change occurring in a normal production. We will show the results from the analytical coupled model (analytical reservoir solution coupled with numerical multi-segment well model) to infer the anomalous temperature or pressure profiles under various conditions, and the preliminary results from the numerical coupled reservoir model which solves full matrix including wellbore grids. We applied Ramey's model to the build section and used an enthalpy balance to infer the temperature profile at the junction. The multilateral wellbore temperature model was applied to a wide range of cases varying fluid thermal properties, absolute values of temperature and pressure, geothermal gradients, flow rates from each lateral, and the trajectories of each build section.

Pinan Dawkrajai; Keita Yoshioka; Analis A. Romero; Ding Zhu; A.D. Hill; Larry W. Lake

2005-10-01T23:59:59.000Z

491

Simulating the dynamics of auroral phenomena  

Science Conference Proceedings (OSTI)

Simulating natural phenomena has always been a focal point for computer graphics research. Its importance goes beyond the production of appealing presentations, since research in this area can contribute to the scientific understanding of complex natural ... Keywords: Atmospheric effects, natural phenomena, plasma phenomena, rendering

Gladimir V. G. Baranoski; Justin Wan; Jon G. Rokne; Ian Bell

2005-01-01T23:59:59.000Z

492

Real-time PCR quantification of human adenoviruses in urban rivers indicates genome prevalence but low infectivity  

E-Print Network (OSTI)

integrated cell culture-nested PCR procedure, p. 547. Abstr.samples by real-time PCR. Appl. Environ. Microbiol. 71:2250–Real time quantitative PCR for enteric adenovirus serotype

Choi, S; Jiang, Sunny C

2005-01-01T23:59:59.000Z

493

Ensemble Simulations with Coupled Atmospheric Dynamic and Dispersion Models: Illustrating Uncertainties in Dosage Simulations  

Science Conference Proceedings (OSTI)

Ensemble simulations made using a coupled atmospheric dynamic model and a probabilistic Lagrangian puff dispersion model were employed in a forensic analysis of the transport and dispersion of a toxic gas that may have been released near Al ...