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

Parameter Estimation Using Dual Fractional Power Filters Jason M. Kinser  

E-Print Network (OSTI)

by the user, they only have to be contained within the training set. A dual filter system will be created from an unknown input from the training set was operated on by the filter the constraint value associatedParameter Estimation Using Dual Fractional Power Filters Jason M. Kinser The Institute

Kinser, Jason M.

2

Dual Tank Fuel System  

DOE Patents (OSTI)

A dual tank fuel system has primary and secondary fuel tanks, with the primary tank including a filler pipe to receive fuel and a discharge line to deliver fuel to an engine, and with a balance pipe interconnecting the primary tank and the secondary tank. The balance pipe opens close to the bottom of each tank to direct fuel from the primary tank to the secondary tank as the primary tank is filled, and to direct fuel from the secondary tank to the primary tank as fuel is discharged from the primary tank through the discharge line. A vent line has branches connected to each tank to direct fuel vapor from the tanks as the tanks are filled, and to admit air to the tanks as fuel is delivered to the engine.

Wagner, Richard William (Albion, NY); Burkhard, James Frank (Churchville, NY); Dauer, Kenneth John (Avon, NY)

1999-11-16T23:59:59.000Z

3

Duals of Weighted Exponential Systems  

Science Journals Connector (OSTI)

The paper considers the basis and frame properties of the system of weighted exponentials ... Keywords: 42C15, 46C99, Frames, Gabor systems, Overcompleteness, Riesz bases, Weighted exponentials

Gang Joon Yoon; Christopher Heil

2012-06-01T23:59:59.000Z

4

Development of an ANN based system identification tool to estimate the performance-emission characteristics of a CRDI assisted CNG dual fuel diesel engine  

Science Journals Connector (OSTI)

Abstract In the present study the performance and emission parameters of a single cylinder four-stroke CRDI engine under CNG-diesel dual-fuel mode have been modeled by Artificial Neural Network. An ANN model was developed to predict BSFC, BTE, NOx, PM and HC based on the experimental data, with load, fuel injection pressure and CNG energy share as input parameters for the network. The developed ANN model was capable of predicting the performance and emission parameters with commendable accuracy as observed from correlation coefficients within the range of 0.99833–0.99999, mean absolute percentage error in the range of 0.045–1.66% along with noticeably low root mean square errors provided an acceptable index of the robustness of the predicted accuracy.

Sumit Roy; Rahul Banerjee; Ajoy Kumar Das; Probir Kumar Bose

2014-01-01T23:59:59.000Z

5

DUAL OPERATOR SYSTEMS DAVID P. BLECHER AND BOJAN MAGAJNA  

E-Print Network (OSTI)

DUAL OPERATOR SYSTEMS DAVID P. BLECHER AND BOJAN MAGAJNA Abstract. We characterize weak* closed system, which is the dual of an operator space, can be represented completely isometrically and weak, and also in mathematical physics. The natural setting for this notion is the category of operator systems

Magajna, Bojan

6

Dual-keel electrodynamic maglev system  

DOE Patents (OSTI)

A propulsion and stabilization system is disclosed with a plurality of superconducting magnetic devices affixed to the dual-keels of a vehicle, where the superconducting magnetic devices produce a magnetic field when energized. The system also includes a plurality of figure-eight shaped null-flux coils affixed to opposing vertical sides of slots in a guideway. The figure-eight shaped null-flux coils are vertically oriented, laterally cross-connected in parallel, longitudinally connected in series, and continue the length of the vertical slots providing levitation and guidance force. An external power source energizes the figure-eight shaped null-flux coils to create a magnetic traveling wave that interacts with the magnetic field produced by the superconducting magnets to impart motion to the vehicle. 6 figs.

He, J.L.; Wang, Z.; Rote, D.M.; Coffey, H.T.; Hull, J.R.; Mulcahy, T.M.; Cal, Y.

1996-12-24T23:59:59.000Z

7

An Early Performance Evaluation of the NEXRAD Dual-Polarization Radar Rainfall Estimates for Urban Flood Applications  

Science Journals Connector (OSTI)

Dual-polarization radars are expected to provide better rainfall estimates than single-polarization radars because of their ability to characterize hydrometeor type. The goal of this study is to evaluate single- and dual-polarization radar ...

Luciana K. Cunha; James A. Smith; Mary Lynn Baeck; Witold F. Krajewski

2013-12-01T23:59:59.000Z

8

Dual port temperature sensor tag for passive UHF RFID systems  

E-Print Network (OSTI)

Dual port temperature sensor tag for passive UHF RFID systems J. Virtanen Rauma Research Unit and to simplify the measurement procedure. Design/methodology/approach ­ The sensor tag is based on a dual port sensing concept in which two ports are used to obtain sensor readings. By utilizing two ports instead

Elsherbeni, Atef Z.

9

Los Alamos PC estimating system  

SciTech Connect

The Los Alamos Cost Estimating System (QUEST) is being converted to run on IBM personal computers. This very extensive estimating system is capable of supporting cost estimators from many different and varied fields. QUEST does not dictate any fixed method for estimating. QUEST supports many styles and levels of detail estimating. QUEST can be used with or without data bases. This system allows the estimator to provide reports based on levels of detail defined by combining work breakdown structures. QUEST provides a set of tools for doing any type of estimate without forcing the estimator to use any given method. The level of detail in the estimate can be mixed based on the amount of information known about different parts of the project. The system can support many different data bases simultaneously. Estimators can modify any cost in any data base.

Stutz, R.A.; Lemon, G.D.

1987-01-01T23:59:59.000Z

10

ROCKY MOUNTAIN OILFIELD TESTING CENTER Texaco Dual Action Pumping System  

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

Texaco Dual Action Pumping System Texaco Dual Action Pumping System PROJECT TEST RESULTS March 16, 1998 Michael R. Tyler Project Manager Abstract The Texaco Dual Action Pumping System (DAPS) is designed to separate water from the oil in the casing-tubing annulas and inject most of the water into a lower formation while lifting the oil and remaining water to the surface. As oil production declines in a well the water production can increase. The lifting cost can be reduced per barrel of oil if less water is brought to the surface and processed. The DAPS was installed in a well that had been producing four (4) barrels of oil per day (bopd) and 46 barrels of water per day (bwpd), from the zone that became the injection zone. The well was recompleted in a shallower zone that was expected to yield an excessive quantity of

11

Variable Speed Drive (VSD) Applications in Dual-Duct Constant Volume Systems  

E-Print Network (OSTI)

Models have been developed for static pressure and potential supply fan energy savings by using variable speed drive (VSD) in dual-duct constant volume systems. Experiments have been performed using a full size dual-duct constant volume system...

Joo, I.; Liu, M.; Conger, K.; Wang, G.

2002-01-01T23:59:59.000Z

12

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles  

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

Developing a low and high temperature dual thermoelectric generation waste heat recovery system for light-duty vehicles.

13

A Dual-Armed Robotic System for Intraoperative Ultrasound Guided Hepatic Ablative Therapy:A  

E-Print Network (OSTI)

A Dual-Armed Robotic System for Intraoperative Ultrasound Guided Hepatic Ablative Therapy, we propose the use of a dual robotic arm system that manages both ultrasound manipulation and needle guidance. We report a prototype of the dual arm system and a comparative performance analysis between

Camesano, Terri

14

Contrast limitations of dual electrochromic systems J. Padilla *, T.F. Otero *  

E-Print Network (OSTI)

Contrast limitations of dual electrochromic systems J. Padilla *, T.F. Otero * Center characterize any combination of a dual electrochromic system as a function of the redox charge of its reserved. Keywords: Conducting polymer; Electrochromism; Maximum contrast; Dual system; PEDOT; ProDOT 1

Otero, Toribio Fernández

15

Operator Systems: Quotients, Duals and Tensors with Applications to Connes' Embedding  

E-Print Network (OSTI)

Operator Systems: Quotients, Duals and Tensors with Applications to Connes' Embedding Conjecture and Mark Tomforde Banff, Alberta February, 2012 Vern Paulsen Operator Systems: Quotients, Duals and Tensors are the completely bounded maps. Vern Paulsen Operator Systems: Quotients, Duals and Tensors with Applicat #12

Argerami, Martin

16

Solution of symmetry equation and hierarchy of self dual Yang-Mills systems  

E-Print Network (OSTI)

The solution of symmetry equation of Yang-Mills self dual system is found in explicit form of its raising Hamiltonian operator. Thus explicit form of equations of self dual Yang Mills hierarchy is constructed.

A. N. Leznov

2008-02-11T23:59:59.000Z

17

Dual-range linearized transimpedance amplifier system  

DOE Patents (OSTI)

A transimpedance amplifier system is disclosed which simultaneously generates a low-gain output signal and a high-gain output signal from an input current signal using a single transimpedance amplifier having two different feedback loops with different amplification factors to generate two different output voltage signals. One of the feedback loops includes a resistor, and the other feedback loop includes another resistor in series with one or more diodes. The transimpedance amplifier system includes a signal linearizer to linearize one or both of the low- and high-gain output signals by scaling and adding the two output voltage signals from the transimpedance amplifier. The signal linearizer can be formed either as an analog device using one or two summing amplifiers, or alternately can be formed as a digital device using two analog-to-digital converters and a digital signal processor (e.g. a microprocessor or a computer).

Wessendorf, Kurt O. (Albuquerque, NM)

2010-11-02T23:59:59.000Z

18

Dual fuel engine control systems for transportation applications  

SciTech Connect

Microprocessor control systems have been developed for dual fuel diesel engines intended for transportation applications. Control system requirements for transportation engines are more demanding than for stationary engines, as the system must be able to cope with variable speed and load. Detailed fuel maps were determined for both normally aspirated and turbocharged diesel engines based on the criterion that the engine did not operate in the regimes where knock or incomplete combustion occurred. The control system was developed so that the engine would follow the detailed fuel map. The input variables to the control system are engine speed and load. Based on this, the system then controls the amount of natural gas and diesel fuel supplied to the engine. The performance of the system is briefly summarized.

Gettel, L.E.; Perry, G.C.; Boisvert, J.; O'Sullivan, P.J.

1987-10-01T23:59:59.000Z

19

Monitoring system assists in dual-fuel engine knock prevention  

SciTech Connect

ABB Industrietechnik AG recently has introduced an augmented version of its Cyldeyt cylinder pressure monitoring system aimed at spark-ignited and diesel/gas, dual-fuel engines. In addition to recording and evaluating cylinder pressure as a means of assessing engine condition, the new Cyldet version now evaluates the cylinder pressure signals to provide protection against pre-ignition related damage. When pre-ignition reaches critical levels, the Cyldet computer relays alarm signals in two stages to the overriding engine control system of the power plant. On receiving the first-stage alarm signal, the engine control system is programmed to adjust one or more engine settings to eliminate preignition - a typical adjustment is to lower charge-air temperature, for example. If such measures fail to eliminate pre-ignition, in the case of a dual-fuel engine, a second alarm signal triggers a reduction in engine load or, as last resort, changeover of the engine to 100% diesel fuel charge. This paper outlines the advantages and applications of the system. 1 fig., 1 tab.

Not Available

1995-03-01T23:59:59.000Z

20

The thermodynamic dual structure of linear-dissipative driven systems  

E-Print Network (OSTI)

The spontaneous emergence of dynamical order, such as persistent currents, is sometimes argued to require principles beyond the entropy maximization of the second law of thermodynamics. I show that, for linear dissipation in the Onsager regime, current formation can be driven by exactly the Jaynesian principle of entropy maximization, suitably formulated for extended systems and nonequilibrium boundary conditions. The Legendre dual structure of equilibrium thermodynamics is also preserved, though it requires the admission of current-valued state variables, and their correct incorporation in the entropy.

Eric Smith

2005-05-02T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Dual Fuel Conversion System for Diesel Engines: Inventions and Innovation Project Fact Sheet  

SciTech Connect

Project fact sheet written for the Inventions and Innovation Program about a new dual fuel conversion system allows diesel fuel switching with clean burning natural gas.

Wogsland, J.

2001-01-25T23:59:59.000Z

22

Dual annular rotating "windowed" nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core.

Jacox, Michael G. (Idaho Falls, ID); Drexler, Robert L. (Idaho Falls, ID); Hunt, Robert N. M. (Idaho Falls, ID); Lake, James A. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

23

Harmonizing Systems and Software Cost Estimation  

E-Print Network (OSTI)

The objective of this paper is to examine the gaps and overlaps between software and systems engineering cost models with intent to harmonize the estimates in engineering engineering estimation. In particular, we evaluate ...

Wang, Gan

2009-07-19T23:59:59.000Z

24

Thickness measurement system for transparent plates using dual digital versatile disc (DVD) pickups  

SciTech Connect

A low-cost high-precision thickness measurement system for transparent plates that uses dual digital versatile disc (DVD) pickups is proposed. The two DVD pickups are used as the transmitter and the receiver in the measurement system, respectively. One of the DVD pickups emits a laser to the other DVD pickup (receiver) and projects on the photodiode integrated circuit of the receiver. The transparent plate is placed in the optical path to change the focused point that will affect the focusing error signal (FES) of the receiver. Using the FES, a mathematical model for thickness measurement based on the geometric optical method is developed. The experimental results show that the accuracy is 1.5 {mu}m, and the uncertainty is estimated to be {+-}1.37 {mu}m for the measured thickness of 150{mu}m.

Liu, Chien-Hung; Yeh, Shien-Chang; Huang, Hsueh-Liang

2010-02-01T23:59:59.000Z

25

The B F Goodrich Information Retrieval System and Automatic Information Distribution Using Computer-Compiled Thesaurus and Dual Dictionary  

Science Journals Connector (OSTI)

The B F Goodrich Information Retrieval System and Automatic Information Distribution Using Computer-Compiled Thesaurus and Dual Dictionary ...

Paul J. Horvath; Alice Yanosko. Chamis; Robert F. Carroll; Joyce. Dlugos

1967-08-01T23:59:59.000Z

26

A Protocol for Quality Control Testing for Contrast-Enhanced Dual Energy Mammography Systems  

Science Journals Connector (OSTI)

Physics and radiographer QC procedures are urgently needed as the first few contrast-enhanced dual energy systems have been installed in the U.K. Preliminary work on one commercially available system has enabl...

Jennifer Oduko; Peter Homolka; Vivienne Jones; David Whitwam

2014-01-01T23:59:59.000Z

27

Impacts of Raindrop Fall Velocity and Axis Ratio Errors on Dual-Polarization Radar Rainfall Estimation  

Science Journals Connector (OSTI)

Motivated by the field observations of fall velocity and axis ratio deviations from predicted terminal velocity and equilibrium axis ratio values, the combined effects of raindrop fall velocity and axis ratio deviations on dual-polarization radar ...

Bin Pei; Firat Y. Testik; Mekonnen Gebremichael

2014-10-01T23:59:59.000Z

28

Hybrid Systems State estimation for hybrid systems: applications  

E-Print Network (OSTI)

Hybrid Systems State estimation for hybrid systems: applications to aircraft tracking I. Hwang, H of a stochastic linear hybrid system, given only the continuous system output data, is studied. Well established techniques for hybrid estimation, known as the multiple model adaptive estimation algorithm

Tomlin, Claire

29

Efficient Power System State Estimation  

E-Print Network (OSTI)

measure the data from the system components such as transmission line power flows, bus power injections monitoring of power systems. 2. Background Power systems have four main components: transmission, sub-transmission failure or generator outages. In the normal insecure state, a system may not be able to handle

Lavaei, Javad

30

A Monte Carlo study of the distribution of parameter estimators in a dual exponential decay model  

E-Print Network (OSTI)

inspired me to overcome several problems in preparing this paper. TABLE OF CONTENTS Chapter I. INTRODUCTION II, PROCEDURE Selecting Representative Parameters Generating Sample Curves Obtaining the Parameter Estimates 3 3 4 III, ANALYSIS... Type I Parameter Estimates 3. Set-3 Type I Parameter Estimates 4. Set-3A Type I Parameter Estimates 5. Summary of Chi-square Goodness of Fit Test 6. Set-1 Type II Parameter Estimates 7. Set-2 Type II Parameter Estimates 8. Set-3 Type II Parameter...

Garcia, Raul

1969-01-01T23:59:59.000Z

31

Performance estimates for personnel access control systems  

SciTech Connect

Current performance estimates for personnel access control systems use estimates of Type I and Type II verification errors. A system performance equation which addresses normal operation, the insider, and outside adversary attack is developed. Examination of this equation reveals the inadequacy of classical Type I and II error evaluations which require detailed knowledge of the adversary threat scenario for each specific installation. Consequently, new performance measures which are consistent with the performance equation and independent of the threat are developed as an aid in selecting personnel access control systems.

Bradley, R. G.

1980-10-01T23:59:59.000Z

32

Distributed Robust Power System State Estimation  

E-Print Network (OSTI)

Deregulation of energy markets, penetration of renewables, advanced metering capabilities, and the urge for situational awareness, all call for system-wide power system state estimation (PSSE). Implementing a centralized estimator though is practically infeasible due to the complexity scale of an interconnection, the communication bottleneck in real-time monitoring, regional disclosure policies, and reliability issues. In this context, distributed PSSE methods are treated here under a unified and systematic framework. A novel algorithm is developed based on the alternating direction method of multipliers. It leverages existing PSSE solvers, respects privacy policies, exhibits low communication load, and its convergence to the centralized estimates is guaranteed even in the absence of local observability. Beyond the conventional least-squares based PSSE, the decentralized framework accommodates a robust state estimator. By exploiting interesting links to the compressive sampling advances, the latter jointly es...

Kekatos, Vassilis

2012-01-01T23:59:59.000Z

33

Annex to the agreement on CLUSTER Dual Masters between IST and KTH Master Program on Systems, Control and Robotics (SCR)  

E-Print Network (OSTI)

, Control and Robotics (SCR) B-1/4 Appendix B: Dual Degree Agreement between Instituto Superior Técnico (IST on Systems, Control and Robotics (SCR) B-2/4 This page is intentionally left blank #12;Annex to the agreement on CLUSTER Dual Masters between IST and KTH Master Program on Systems, Control and Robotics (SCR) B-3/4 FIRST

Instituto de Sistemas e Robotica

34

On the Dual Effect in State-Based Scheduling of Networked Control Systems  

E-Print Network (OSTI)

On the Dual Effect in State-Based Scheduling of Networked Control Systems Chithrupa Ramesh, Henrik with state-based scheduling. In general, this makes the optimal scheduler and controller hard to find. However, by removing past controls from the scheduling criterion, we find that certainty equivalence holds

Johansson, Karl Henrik

35

Enhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n  

E-Print Network (OSTI)

of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794, USA a r t i c l eEnhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n Department-mass vibration energy harvester, where two masses are connected in series with the energy transducer and spring

Zuo, Lei

36

IRAN UNDER MONGOL DOMINATION The effectiveness and failings of a dual administrative system  

E-Print Network (OSTI)

IRAN UNDER MONGOL DOMINATION The effectiveness and failings of a dual administrative system Denise, as countries with a long sedentary tradition, such as China and Iran, were made subject to a single people of the steppes for over a century.4 THE CONQUEST OF THE IRANIAN LANDS Iran had suffered other major invasions

Paris-Sud XI, Université de

37

Identification and compensation of friction for a dual stage positioning system  

E-Print Network (OSTI)

increases the accuracy of the read/write head in hard disk drives. A scaled up version of the dual stage actuator is considered as the test bed for this thesis. Friction is present in all electromechanical systems. This thesis deals with modelling...

Thimmalapura, Satish Voddina

2005-11-01T23:59:59.000Z

38

PRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM  

E-Print Network (OSTI)

comprising thermal and pumped-storage hydro units a large-scale mixed-integer optimization model is developed of big coal red blocks with several pumped storage plants of di ering e ciencies provides the mainPRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM R. Gollmer1 , A. Moller

Römisch, Werner

39

Continuous Commissioning® of a Single Fan Dual Duct System in an Office Building  

E-Print Network (OSTI)

Continuous Commissioning ® of a Single Fan Dual Duct System in an Office Building D. Dong M. Liu, Ph.D., P.E Jinrong Wang, P.E Energy Systems Laboratory Energy Systems Laboratory... of AHU control sequences can significantly improve building comfort and reduce HVAC energy cost. REFERENCES 1. Liu, M., Y. Zhu, and D. E. Claridge, “Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations...

Dong, D.; Liu, M.

2005-01-01T23:59:59.000Z

40

Comparison between single- and dual-electrode ion source systems for low-energy ion transport  

SciTech Connect

Extraction of ions with energies below 100 eV has been demonstrated using a hot-cathode multi-cusp ion source equipped with extraction electrodes made of thin wires. Two electrode geometries, a single-electrode system, and a dual-electrode system were built and tested. The single-electrode configuration showed high ion beam current densities at shorter distances from the electrode but exhibited rapid attenuation as the distance from the electrode increased. Beam angular spread measurements showed similar beam divergence for both electrode configurations at low plasma densities. At high plasma densities and low extraction potentials, the single-electrode system showed the angular spread twice as large as that of the dual-electrode system. Energy distribution analyses showed a broader energy spread for ion beams extracted from a single-electrode set-up.

Vasquez, M. Jr.; Tokumura, S.; Kasuya, T.; Maeno, S.; Wada, M. [Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 and Nissin Ion Equipment Co., Ltd. 575 Kuze Tonoshiro-cho, Minami-ku, Kyoto 601-8205 (Japan); Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 (Japan); Novelion Systems Co.Ltd., D-Egg, Kyotanabe, Kyoto 610-332 (Japan); Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 (Japan)

2012-11-06T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Characterization of ceramic coating on ZK60 magnesium alloy prepared in a dual electrolyte system by micro-arc oxidation  

Science Journals Connector (OSTI)

Micro-arc oxidation (MAO) process was carried out in...2O4 and MgO are the main phases of ceramic coating obtained in the dual electrolyte system. The corrosion rate of coating prepared in the optimized dual elec...

Ze-Xin Wang; Wei-Gang Lv; Jing Chen; Sheng Lu

2013-10-01T23:59:59.000Z

42

Dual Loop Parallel/Series Waste Heat Recovery System  

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

This system captures all the jacket water, intercooler, and exhaust heat from the engine by utilizing a single condenser to reject leftover heat to the atmosphere.

43

DualTrust: A Distributed Trust Model for Swarm-Based Autonomic Computing Systems  

SciTech Connect

For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, trust management is important for the acceptance of the mobile agent sensors and to protect the system from malicious behavior by insiders and entities that have penetrated network defenses. This paper examines the trust relationships, evidence, and decisions in a representative system and finds that by monitoring the trustworthiness of the autonomic managers rather than the swarming sensors, the trust management problem becomes much more scalable and still serves to protect the swarm. We then propose the DualTrust conceptual trust model. By addressing the autonomic manager’s bi-directional primary relationships in the ACS architecture, DualTrust is able to monitor the trustworthiness of the autonomic managers, protect the sensor swarm in a scalable manner, and provide global trust awareness for the orchestrating autonomic manager.

Maiden, Wendy M.; Dionysiou, Ioanna; Frincke, Deborah A.; Fink, Glenn A.; Bakken, David E.

2011-02-01T23:59:59.000Z

44

System-Level Logistics for Dual Purpose Canister Disposal  

SciTech Connect

The analysis presented in this report investigated how the direct disposal of dual purpose canisters (DPCs) may be affected by the use of standard transportation aging and disposal canisters (STADs), early or late start of the repository, and the repository emplacement thermal power limits. The impacts were evaluated with regard to the availability of the DPCs for emplacement, achievable repository acceptance rates, additional storage required at an interim storage facility (ISF) and additional emplacement time compared to the corresponding repackaging scenarios, and fuel age at emplacement. The result of this analysis demonstrated that the biggest difference in the availability of UNF for emplacement between the DPC-only loading scenario and the DPCs and STADs loading scenario is for a repository start date of 2036 with a 6 kW thermal power limit. The differences are also seen in the availability of UNF for emplacement between the DPC-only loading scenario and the DPCs and STADs loading scenario for the alternative with a 6 kW thermal limit and a 2048 start date, and for the alternatives with a 10 kW thermal limit and 2036 and 2048 start dates. The alternatives with disposal of UNF in both DPCs and STADs did not require additional storage, regardless of the repository acceptance rate, as compared to the reference repackaging case. In comparison to the reference repackaging case, alternatives with the 18 kW emplacement thermal limit required little to no additional emplacement time, regardless of the repository start time, the fuel loading scenario, or the repository acceptance rate. Alternatives with the 10 kW emplacement thermal limit and the DPCs and STADs fuel loading scenario required some additional emplacement time. The most significant decrease in additional emplacement time occurred in the alternative with the 6 kW thermal limit and the 2036 repository starting date. The average fuel age at emplacement ranges from 46 to 88 years. The maximum fuel age at emplacement ranges from 81 to 146 years. The difference in the average and maximum age of fuel at emplacement between the DPC-only and the DPCs and STADs fuel loading scenarios becomes less significant as the repository thermal limit increases and as the repository start date increases. In general, the role of STADs is to store young (30 year or younger) high burnup (45 GWD/MTU or higher) fuel. Recommendations for future study include detailed evaluation of the feasible alternatives with regard to the costs and factors not considered in this analysis, such as worker dose, dose to members of the public, and economic benefits to host entities. It is also recommended to conduct an additional analysis to evaluate the assumption regarding the transportability and disposability of DPCs for the next iteration of the direct disposal of DPCs study.

Kalinina, Elena A.

2014-06-03T23:59:59.000Z

45

Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Theory and Model Simulation  

E-Print Network (OSTI)

Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Theory and Model Simulation Mingsheng Liu, Ph.D., P.E. Energy Systems Laboratory Texas A&M University College Station, Texas Abstract Optimal hot and cold deck... rate increased from 30% to 70% of the maximum flow. Introduction Simultaneous heating and cooling can be reduced sigmficantly by optimizing cold and hot deck reset schedules in dual duct constant volume systems [Liu et. a1 1994, 1995, 19961...

Liu, M.; Claridge, D. E.

1998-01-01T23:59:59.000Z

46

Abstract--A widespread application of impedance control in dual-arm robotic systems is still a challenging problem. One of limitations is  

E-Print Network (OSTI)

Abstract-- A widespread application of impedance control in dual- arm robotic systems is still provides efficient and flexible algorithms and tools which considerably facilitate future dual-arm robot and users for this new class of robotic systems. The main advantages and benefits of dual arm-robots over

47

Dual-channel filter photometer system for biocomponent content determination in diesel oil  

Science Journals Connector (OSTI)

Currently, infrared spectrometry is the most often used method of determination of the biocomponent content in diesel oil, but this is also an expensive and time-consuming process. In this study, a portable, low-cost dual-channel filter photometer system is presented which meets the requirements of the European standard for biocomponent concentration measurements in diesel fuel. The results obtained using this novel system are reported and compared to the measurements made using a standard infrared spectrometer for biodiesel concentration between 0% and 20% by weight. The advantages of the new system, such as its adaptability to the different environmental conditions of analysis, are also discussed.

Jacek Go??biowski; Tomasz Prohu?

2008-01-01T23:59:59.000Z

48

A Sensor-Based Dual-Arm Tele-Robotic System Daniel Kruse, Student Member, IEEE, John T. Wen, Fellow, IEEE, and Richard J. Radke, Senior Member, IEEE  

E-Print Network (OSTI)

1 A Sensor-Based Dual-Arm Tele-Robotic System Daniel Kruse, Student Member, IEEE, John T. Wen coordinated task-based control on a dual-arm industrial robot for the gen- eral tasks of visual servoing. The specific experimental testbed involves a 15 degree-of- freedom dual-arm industrial robot with each wrist

Radke, Rich

49

Process for whole cell saccharification of lignocelluloses to sugars using a dual bioreactor system  

DOE Patents (OSTI)

The present invention describes a process for saccharification of lignocelluloses to sugars using whole microbial cells, which are enriched from cultures inoculated with paper mill waste water, wood processing waste and soil. A three-member bacterial consortium is selected as a potent microbial inocula and immobilized on inedible plant fibers for biomass saccharification. The present invention further relates the design of a dual bioreactor system, with various biocarriers for enzyme immobilization and repeated use. Sugars are continuously removed eliminating end-product inhibition and consumption by cell.

Lu, Jue (Okemos, MI); Okeke, Benedict (Montgomery, AL)

2012-03-27T23:59:59.000Z

50

An advanced economizer controller for dual-duct air-handling systems -- with a case application  

SciTech Connect

A heating penalty is expected when economizers are applied to dual-duct air-handling systems. The heating penalty can be even higher than the cooling savings when the hot airflow is higher than the cold airflow. To avoid the excessive heating penalty, advanced economizers are developed in this paper. The application of the advanced economizer has resulted in savings of $7,000/yr in one 95,000-ft{sup 2} (8,800-m{sup 2}) school building since 1993. The impacts of cold and hot deck settings on the energy consumption are also discussed.

Liu, M.; Claridge, D.E. [Texas A and M Univ., College Station, TX (United States). Mechanical Engineering Dept.; Park, B.Y. [Engineering Education Inst., Inchon (Korea, Republic of). Dept. of Architectural Engineering

1997-12-31T23:59:59.000Z

51

Dual-mode self-validating resistance/Johnson noise thermometer system  

DOE Patents (OSTI)

A dual-mode Johnson noise and DC resistance thermometer capable of use in control systems where prompt indications of temperature changes and long term accuracy are needed. A resistance-inductance-capacitance (RLC) tuned circuit produces a continuous voltage signal for Johnson noise temperature measurement. The RLC circuit provides a mean-squared noise voltage that depends only on the capacitance used and the temperature of the sensor. The sensor has four leads for simultaneous coupling to a noise signal processor and to a DC resistance signal processor.

Shepard, Robert L. (Oak Ridge, TN); Blalock, Theron V. (Knoxville, TN); Roberts, Michael J. (Knoxville, TN)

1993-01-01T23:59:59.000Z

52

Estimating Power System Dynamic States Using Extended Kalman Filter  

SciTech Connect

Abstract—The state estimation tools which are currently deployed in power system control rooms are based on a steady state assumption. As a result, the suite of operational tools that rely on state estimation results as inputs do not have dynamic information available and their accuracy is compromised. This paper investigates the application of Extended Kalman Filtering techniques for estimating dynamic states in the state estimation process. The new formulated “dynamic state estimation” includes true system dynamics reflected in differential equations, not like previously proposed “dynamic state estimation” which only considers the time-variant snapshots based on steady state modeling. This new dynamic state estimation using Extended Kalman Filter has been successfully tested on a multi-machine system. Sensitivity studies with respect to noise levels, sampling rates, model errors, and parameter errors are presented as well to illustrate the robust performance of the developed dynamic state estimation process.

Huang, Zhenyu; Schneider, Kevin P.; Nieplocha, Jaroslaw; Zhou, Ning

2014-10-31T23:59:59.000Z

53

PDE Estimation Techniques for Advanced Battery Management Systems -Part I: SOC Estimation  

E-Print Network (OSTI)

- cles and renewable energy resources is battery energy storage. Advanced battery systems representPDE Estimation Techniques for Advanced Battery Management Systems - Part I: SOC Estimation S. J and renewable energy research, including advanced batteries, under the American Recovery and Rein- vestment Act

Krstic, Miroslav

54

Snow growth and transport patterns in orographic storms as estimated from airborne vertical-plane dual-Doppler radar data  

Science Journals Connector (OSTI)

Airborne vertical-plane dual-Doppler cloud radar data, collected on wind-parallel flight legs over a mountain in Wyoming in 16 winter storms, are used to analyze the growth, transport, and sedimentation of snow. In all storms the wind is rather ...

Bart Geerts; Yang Yang; Roy Rasmussen; Samuel Haimov; Binod Pokharel

55

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel Inverted Pendulum  

E-Print Network (OSTI)

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel underac- tuated mechanical system: the inertia wheel inverted pendulum. Numerical simulations as well: the ball and beam [9] (where the dynamics of the beam has not been taken into account) and the Planar

Paris-Sud XI, Université de

56

A novel dual stator-winding induction generator system applied in wind power generation  

Science Journals Connector (OSTI)

This paper presents a novel usage of 6/3-phase dual stator-winding induction generator (DWIG) with a static excitation power controller (SEC) as a wind power generator. This generator is composed of a standard squirrel-cage rotor and two sets of winding housed in the stator slots. One is referred to as the 6-phase power winding, and the other is defined as the 3-phase control winding. On the basis of the instantaneous power theory, the control mechanism of DWIG wind power system is analysed, and the control winding flux orientation control strategy is obtained consequently. The simulation and experimental results from a prototype of 18 kW 6/3-phase DWIG wind power system are presented to verify the correctness and feasibility of control strategy, and a desirable performance is implemented.

Bu Feifei; Huang Wenxin; Hu Yuwen; Shi Kai

2010-01-01T23:59:59.000Z

57

Dual annular rotating [open quotes]windowed[close quotes] nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core. 4 figures.

Jacox, M.G.; Drexler, R.L.; Hunt, R.N.M.; Lake, J.A.

1994-03-29T23:59:59.000Z

58

Estimation of the radiation exposure of a chest pain protocol with ECG-gating in dual-source computed tomography  

Science Journals Connector (OSTI)

The estimation of the radiation exposure of the protocols we used resulted in effective doses differing among genders: for women, the estimated effective doses were 14.0% higher compared with men...

Dominik Ketelsen; Marie H. Luetkhoff; Christoph Thomas…

2009-01-01T23:59:59.000Z

59

Dual axis translation apparatus and system for translating an optical beam and related method  

DOE Patents (OSTI)

A dual axis translation device and system in accordance with this invention, for translating an optical beam along both an x-axis and a y-axis which are perpendicular to one another, has a beam directing means acting on said optical beam for directing the beam along a particular path transverse to said x and y axes. An arrangement supporting said beam directing means for movement in the x and y direction within a given plane is provided. The arrangement includes a first means for translating said beam directing means along the x-axis in said given plane in order to translate the beam along said x-axis. The arrangement comprises a second means for translating said beam directing means along the y-axis in said given plane in order to translate the beam along said y-axis.

Cassidy, Kelly (Manteca, CA)

1991-01-01T23:59:59.000Z

60

Mandatory Photovoltaic System Cost Estimate | Department of Energy  

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

Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate < Back Eligibility Utility Savings Category Solar Buying & Making Electricity Program Info State Colorado Program Type Line Extension Analysis Provider Colorado Public Utilities Commission At the request of a customer or a potential customer, Colorado electric utilities are required to conduct a cost comparison of a photovoltaic (PV) system to any proposed distribution line extension if the customer or potential customer provides the utility with load data (estimated monthly kilowatt-hour usage) requested by the utility to conduct the comparison, and if the customer's or potential customer's peak demand is estimated to be less than 25 kilowatts (kW). In performing the comparison analysis, the

Note: This page contains sample records for the topic "dual system estimation" 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

Design of dual column water purification system for industrial gamma irradiator based of PUROLITE® resins  

Science Journals Connector (OSTI)

Abstract When gamma irradiators are not in use, they have to be stored in nuclear grade water pool. This water serves as shielding and the medium for the removal of generated heat. To prevent corrosion damage to the gamma source and other equipment a purification system controls the water quality. Also, this system serves as the make-up water system for supplies and maintains the de-ionized water level in the gamma source storage pool. In this paper, the design of the dual system for purification and make-up water for optimal water supply and its chemical parameters in the gamma source storage pool is presented. For this purpose, the characteristics of activated carbon purifier, anionic and cationic demineralizers have been determined. “Aerb Safety Standard”, “Purolite Ion Exchange Design Code” and “Canadian Water Refining Company Manual” have been used to design IR-136 gamma irradiator storage pool purification and make-up water system. The main objective of the design is to maintain water purity throughout the storage time.

Reza Gholizadeh Aghoyeh; Hossein Khalafi

2014-01-01T23:59:59.000Z

62

Procedure and Application for Determining the Cold Deck and Hot Deck Airflow in a Dual-Duct System  

E-Print Network (OSTI)

This paper introduces an innovative method to determine the cold and hot airflow through a dual-duct variable air volume (VAV) system. The actual building load can be identified based on the calculated airflow and temperature for both the cold...

Liu, G.; Mingsheng, L.

2006-01-01T23:59:59.000Z

63

Statistical risk estimation for communication system design  

E-Print Network (OSTI)

Spacecraft are complex systems that involve many subsystems and multiple relationships among them. The design of a spacecraft is an evolutionary process that starts from requirements and evolves over time. During this ...

Babuscia, Alessandra

2012-01-01T23:59:59.000Z

64

Distributed Predictive Control and Estimation for Systems with Information  

E-Print Network (OSTI)

constraints and a stationary LQG (Linear Quadratic Gaussian) control law is presented based on the model control and estimation law is demonstrated through a numerical simulation of smart grid. KeywordsDistributed Predictive Control and Estimation for Systems with Information Structures Exemplified

65

Using Ilmenite To Reduce the Tar Yield in a Dual Fluidized Bed Gasification System  

Science Journals Connector (OSTI)

In this work, ilmenite was used as the catalytic material in the Chalmers 2–4 MWth dual fluidized bed gasifier to decrease the yield of tar. ... Indirect gasification, using the Dual Fluidized Bed (DFB) concept, has been identified as being suitable for medium- to large-scale production units. ... catalytic reactors, the implementation of specific reaction media such as supercrit. ...

Anton Larsson; Mikael Israelsson; Fredrik Lind; Martin Seemann; Henrik Thunman

2014-03-10T23:59:59.000Z

66

Implementation of a Dual Containment/Surveillance System utilizing scene-change detection and radio frequency technology  

SciTech Connect

This paper will examine the implementation of scene-change detection and radio frequency technology within a Dual Containment/Surveillance (C/S) System. Additionally, this paper will examine the human performance factors in the operation of these systems. Currently, Westinghouse Savannah River Company utilizes the Continuous Item Monitoring and Surveillance System (CIMS) in the performance of Dual C/S to monitor special nuclear materials within International Atomic Energy Agency (IAEA) Safeguards and Domestic Safeguards. CIMS is comprised of the Material Monitoring System (MMS) (R), a multi-media electronic surveillance system developed by Sandia National Laboratory which incorporates the use of active seals commonly called Radio Frequency Tamper Indicating Devices (RFTIDs), NT Vision (R) as developed by Los Alamos National Laboratory, a Microsoft Windows NT (R) based operating system providing for domestic scene-change detection and the Digital Multi-Camera Optical Surveillance System (DMOS) (R) which provides scene-change detection for IAEA. Although this paper will focus on the implementation of Dual C/S utilizing the Continuous Item Monitoring and Surveillance System, the necessity for a thorough review of Safeguards and Security requirements with organizations and personnel having minimal to no prior MPC&A training will also be covered. Successful Dual C/S implementation plans must consider not only system design and failure modes, but must also be accompanied with the appropriate ''mind shift'' within operations and technical personnel. This is required to ensure completion of both physical and electronic activities, and system design changes are performed conscientiously and with full awareness of MPC&A requirements.

FITZGERALD, ERIC; KOENIG, RICHARD

2005-06-27T23:59:59.000Z

67

Sliding mode control of a dual-stator induction generator for wind energy conversion systems  

Science Journals Connector (OSTI)

This paper presents a sliding mode control (SMC) associated to the field oriented control (FOC) of a dual-stator induction generator (DSIG) based wind energy conversion systems (WECSs). The DSIG has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The study of operation of the wind turbine leads us to two essential cases: optimization of the power for wind speeds lower than the nominal speed of the turbine and limitation of the power for higher speeds. Conventional electrical grid connected WECS present interesting control demands, due to the intrinsic nonlinear characteristic of wind mills and electric generators. The SMC is a robust nonlinear algorithm which uses discontinuous control to force the system states trajectories to join some specified sliding surface, it has been widely used for its robustness to model parameter uncertainties and external disturbances, is studied. In order to verify the validity of the proposed method, a dynamic model of the proposed system has been simulated, to demonstrate its performance.

H. Amimeur; D. Aouzellag; R. Abdessemed; K. Ghedamsi

2012-01-01T23:59:59.000Z

68

Imaging system for cardiac planar imaging using a dedicated dual-head gamma camera  

DOE Patents (OSTI)

A cardiac imaging system employing dual gamma imaging heads co-registered with one another to provide two dynamic simultaneous views of the heart sector of a patient torso. A first gamma imaging head is positioned in a first orientation with respect to the heart sector and a second gamma imaging head is positioned in a second orientation with respect to the heart sector. An adjustment arrangement is capable of adjusting the distance between the separate imaging heads and the angle between the heads. With the angle between the imaging heads set to 180 degrees and operating in a range of 140-159 keV and at a rate of up to 500kHz, the imaging heads are co-registered to produce simultaneous dynamic recording of two stereotactic views of the heart. The use of co-registered imaging heads maximizes the uniformity of detection sensitivity of blood flow in and around the heart over the whole heart volume and minimizes radiation absorption effects. A normalization/image fusion technique is implemented pixel-by-corresponding pixel to increase signal for any cardiac region viewed in two images obtained from the two opposed detector heads for the same time bin. The imaging system is capable of producing enhanced first pass studies, bloodpool studies including planar, gated and non-gated EKG studies, planar EKG perfusion studies, and planar hot spot imaging.

Majewski, Stanislaw (Morgantown, VA); Umeno, Marc M. (Woodinville, WA)

2011-09-13T23:59:59.000Z

69

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...  

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

07 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2007 Update This report estimates fuel cell system cost for systems...

70

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...  

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

Application Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application This report estimates fuel cell system cost for systems produced in the...

71

System and method for motor parameter estimation  

DOE Patents (OSTI)

A system and method for determining unknown values of certain motor parameters includes a motor input device connectable to an electric motor having associated therewith values for known motor parameters and an unknown value of at least one motor parameter. The motor input device includes a processing unit that receives a first input from the electric motor comprising values for the known motor parameters for the electric motor and receive a second input comprising motor data on a plurality of reference motors, including values for motor parameters corresponding to the known motor parameters of the electric motor and values for motor parameters corresponding to the at least one unknown motor parameter value of the electric motor. The processor determines the unknown value of the at least one motor parameter from the first input and the second input and determines a motor management strategy for the electric motor based thereon.

Luhrs, Bin; Yan, Ting

2014-03-18T23:59:59.000Z

72

Optimal PMU Placement Evaluation for Power System Dynamic State Estimation  

E-Print Network (OSTI)

Optimal PMU Placement Evaluation for Power System Dynamic State Estimation Jinghe Zhang, Student--The synchronized phasor measurement unit (PMU), developed in the 1980s, is considered to be one of the most important devices in the future of power systems. The recent development of PMU technology provides high

Bishop, Gary

73

Phasor Measurement Unit Data in Power System State Estimation  

E-Print Network (OSTI)

by supervisory control and data acquisition (SCADA) devices. The incorporation of PMU measurementsPhasor Measurement Unit Data in Power System State Estimation Intermediate Project Report Power Center since 1996 PSERC #12;Power Systems Engineering Research Center Phasor Measurement Unit Data

74

Use of Forest Inventories and Geographic Information Systems To Estimate  

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

Appendix B: Use of Forest Inventories and Geographic Information Systems To Appendix B: Use of Forest Inventories and Geographic Information Systems To Estimate Biomass Density of Tropical Forests: Application to Tropical Africa S. Brown and G. Gaston U.S. Environmental Protection Agency, 200 SW 35th St., Corvalis, OR 97333, USA Abstract One of the most important databases needed for estimating emissions of carbon dioxide resulting from changes in the cover, use, and management of tropical forests is the total quantity of biomass per unit area, referred to as biomass density. Forest inventories have been shown to be valuable sources of data for estimating biomass density, but inventories for the tropics are few in number and their quality is poor. This lack of reliable data has been overcome by use of a promising approach that produces

75

Position Estimation of a Parametrically Driven Optomechanical System  

E-Print Network (OSTI)

We study the position estimation of a mechanical oscillator undergoing both detuned parametric amplification and continuous quantum measurement. This model, which can be utilised to produce squeezed states, is applied to a general optoelectromechanical system. Using a stochastic master equation formalism, we derive general formulae for the reduction in position uncertainty of one quadrature of motion. The filter for extracting the optimal position estimate from the measurement record is derived. We also find that since this scheme does not work far into the back-action dominated regime, implementing resolved-sideband cooling improves the squeezing only marginally.

Alex Szorkovszky; Andrew C. Doherty; Glen I. Harris; Warwick P. Bowen

2012-08-03T23:59:59.000Z

76

A Universal Dual-Fuel Controller for OEM/Aftermarket Diesel Engineswith Comprehensive Fuel & Emission Control  

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

Presents a universal dual fuel ratio controller designed to control the fueling and emissions of dual fuel systems

77

Estimation of simultaneous systems of spatially interrelated cross sectional equations  

Science Journals Connector (OSTI)

In this paper we consider a simultaneous system of spatially interrelated cross sectional equations. Our specification incorporates spatial lags in the endogenous and exogenous variables. In modelling the disturbance process we allow for both spatial correlation as well as correlation across equations. The data set is taken to be a single cross section of observations. The model may be viewed as an extension of the widely used single equation Cliff-Ord model. We suggest computationally simple limited and full information instrumental variable estimators for the parameters of the system and give formal large sample results.

Harry H. Kelejian; Ingmar R. Prucha

2004-01-01T23:59:59.000Z

78

Progress in the dual simplex method for large scale LP problems: practical dual phase 1 algorithms  

Science Journals Connector (OSTI)

The dual simplex algorithm has become a strong contender in solving large scale LP problems. One key problem of any dual simplex algorithm is to obtain a dual feasible basis as a starting point. We give an overview of methods which have been proposed ... Keywords: Dual simplex algorithm, Linear programming, Mathematical optimization system (MOPS)

Achim Koberstein; Uwe H. Suhl

2007-05-01T23:59:59.000Z

79

Low and high Temperature Dual Thermoelectric Generation Waste...  

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

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles Low and high Temperature Dual Thermoelectric Generation Waste Heat...

80

A dual fired downdraft gasifier system to produce cleaner gas for power generation: Design, development and performance analysis  

Science Journals Connector (OSTI)

Abstract The existing biomass gasifier systems have several technical challenges, which need to be addressed. They are reduction of impurities in the gas, increasing the reliability of the system, easy in operation and maintenance. It is also essential to have a simple design of gasifier system for power generation, which can work even in remote locations. A dual fired downdraft gasifier system was designed to produce clean gas from biomass fuel, used for electricity generation. This system is proposed to overcome a number of technical challenges. The system is equipped with dry gas cleaning and indirect gas cooling equipment. The dry gas cleaning system completely eliminates wet scrubbers that require large quantities of water. It also helps to do away with the disposal issues with the polluted water. With the improved gasifier system, the tar level in the raw gas is less than 100 mg Nm?3.Cold gas efficiency has improved to 89% by complete gasification of biomass and recycling of waste heat into the reactor. Several parameters, which are considered in the design and development of the reactors, are presented in detail with their performance indicators.

P. Raman; N.K. Ram; Ruchi Gupta

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Fuel Cell System Cost for Transporationa--2008 Cost Estimate  

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

Fuel Cell System Cost for Fuel Cell System Cost for Transportation-2008 Cost Estimate National Renewable Energy Laboratory 1617 Cole Boulevard * Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Independent Review Published for the U.S. Department of Energy Hydrogen Program NREL/BK-6A1-45457 May 2009 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or

82

Mass Production Cost Estimation of Direct H2 PEM Fuel Cell Systems...  

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

Mass Production Cost Estimation of Direct H2 PEM Fuel Cell Systems for Transportation Applications: 2013 Update Mass Production Cost Estimation of Direct H2 PEM Fuel Cell Systems...

83

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application  

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

This presentation reports on the status of mass production cost estimation for direct hydrogen PEM fuel cell systems.

84

Estimates of the image quality and the radiation dose for head and abdomen phantom image acquisition by using dual-energy CT  

Science Journals Connector (OSTI)

Using dual-energy computed tomography (CT) scans, we obtained ... data set by using low- and high-energy scans (usually 80 and 140 kV, ... and the abdomen examinations were performed using single-energy (120 kV) ...

Dae-Hong Kim; Hee-Joung Kim; Chang-Lae Lee…

2012-04-01T23:59:59.000Z

85

Method to improve cancerous lesion detection sensitivity in a dedicated dual-head scintimammography system  

DOE Patents (OSTI)

An improved method for enhancing the contrast between background and lesion areas of a breast undergoing dual-head scintimammographic examination comprising: 1) acquiring a pair of digital images from a pair of small FOV or mini gamma cameras compressing the breast under examination from opposing sides; 2) inverting one of the pair of images to align or co-register with the other of the images to obtain co-registered pixel values; 3) normalizing the pair of images pixel-by-pixel by dividing pixel values from each of the two acquired images and the co-registered image by the average count per pixel in the entire breast area of the corresponding detector; and 4) multiplying the number of counts in each pixel by the value obtained in step 3 to produce a normalization enhanced two dimensional contrast map. This enhanced (increased contrast) contrast map enhances the visibility of minor local increases (uptakes) of activity over the background and therefore improves lesion detection sensitivity, especially of small lesions.

Kieper, Douglas Arthur (Newport News, VA); Majewski, Stanislaw (Yorktown, VA); Welch, Benjamin L. (Hampton, VA)

2008-10-28T23:59:59.000Z

86

RADIOISOTOPE-DRIVEN DUAL-MODE PROPULSION SYSTEM FOR CUBESAT-SCALE PAYLOADS TO THE OUTER PLANETS  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (approximately 1,000 kgs to LEO) can be targeted. Thus, in effect, allows for beneficial exploration to be conducted within limited budgets. Researchers at the Center for Space Nuclear Research (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO.

N. D. Jerred; T. M. Howe; S. D. Howe; A. Rajguru

2014-02-01T23:59:59.000Z

87

New Results in Stability, Control, and Estimation of Fractional Order Systems  

E-Print Network (OSTI)

of control and estimation, even for systems where fractional order models do not arise “naturally”. This dissertation is aimed at further building of the base methodology with a focus on robust feedback control and state estimation. By setting...

Koh, Bong Su

2012-07-16T23:59:59.000Z

88

Control Strategy for a Dual Loop EGR System to Meet Euro 6 and Beyond  

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

Presentation given at the 2009 DEER Conference. This presentation focues on EGR and Boost systems for reducing the cost and lowering emissions of diesel engines.

89

Dual air-gap axial flux permanent magnet machines for flywheel energy storage systems.  

E-Print Network (OSTI)

??More and more renewable distributed generation (DG) connected to the grid has brought about significant impacts on network system security and reliability. The employment of… (more)

Nguyen, Trong Duy.

2012-01-01T23:59:59.000Z

90

The design of a dual-use pedal control system for use in roadable aircraft  

E-Print Network (OSTI)

The goal of this project is the design of a control system that will make operation of the vehicle intuitive and efficient in both ground and air mode. Using relevant precedents and specific functional and regulatory ...

Zelnick, Benjamin E. (Benjamin Eisenberg)

2007-01-01T23:59:59.000Z

91

Project Profile: Indirect, Dual-Media, Phase Changing Material Modular Thermal Energy Storage System  

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

Acciona Solar, under the Thermal Storage FOA, plans to design and validate a prototype and demonstrate a full-size (800 MWth) thermal energy storage (TES) system based on phase change materials (PCMs).

92

Develop the dual fuel conversion system for high output, medium speed diesel engines. Final report  

SciTech Connect

The original plan for the project involved design modifications to an existing system to enhance its performance and increase the limit of power that was achieved by the original design and to apply the higher performance product to the full sized engine and test its performance. The new system would also be applied to a different engine model. The specific work would include the redesign of gas injectors, piston configurations and two types of igniters, engine instrumentation, monitoring and testing.

NONE

1998-07-16T23:59:59.000Z

93

INVENTORY OF SOLAR RADIATION/SOLAR ENERGY SYSTEMS ESTIMATORS, MODELS, SITE-SPECIFIC DATA, AND PUBLICATIONS  

E-Print Network (OSTI)

INVENTORY OF SOLAR RADIATION/SOLAR ENERGY SYSTEMS ESTIMATORS, MODELS, SITE-SPECIFIC DATA, and Buildings Systems Integration Center National Renewable Energy Laboratory 8 July 2009 SOLAR SYSTEM POTENTIAL/calculators/PVWATTS/version1/ http://rredc.nrel.gov/solar/calculators/PVWATTS/version2/ Estimates the electrical energy

94

The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems  

SciTech Connect

New instrumentation modules have been designed by Jefferson Lab and to take advantage of the higher performance and elegant backplane connectivity of the VITA 41 VXS standard. These new modules are required to meet the 200KHz trigger rates envisioned for the 12GeV experimental program. Upgrading legacy VME designs to the high speed gigabit serial extensions that VXS offers, comes with significant challenges, including electronic engineering design, plus firmware and software development issues. This paper will detail our system design approach including the critical system requirement stages, and explain the pipeline design techniques and selection criteria for the FPGA that require embedded Gigabit serial transceivers. The entire trigger system is synchronous and operates at 250MHz clock with synchronization signals, and the global trigger signals distributed to each front end readout crate via the second switch slot in the 21 slot, dual star VXS backplane. The readout of the buffered detector signals relies on 2eSST over the standard VME64x path at >200MB/s. We have achieved 20Gb/s transfer rate of trigger information within one VXS crate and will present results using production modules in a two crate test configuration with both VXS crates fully populated. The VXS trigger modules that reside in the front end crates, will be ready for production orders by the end of the 2011 fiscal year. VXS Global trigger modules are in the design stage now, and will be complete to meet the installation schedule for the 12GeV Physics program.

Cuevas, C; Barbosa, F J; Dong, H; Gu, W; Jastrzembski, E; Kaneta, S R; Moffitt, B; Nganga, N; Raydo, B J; Somov, A; Taylor, W M

2011-10-01T23:59:59.000Z

95

Is pelvic bone mineral content assessed through dual energy X-ray absorptionmetry an appropriate anatomical area for bone mass estimation in women?  

Science Journals Connector (OSTI)

Bibliographic references seem very controversill regarding the most appropriate anatomical area for bone mass estimation. Since some overlapping in the different bone mass measurements among normal and osteopo...

Prof. Dr. H. Rico; M. Revilla; E. R. Hernández; L. F. Villa…

1992-12-01T23:59:59.000Z

96

Design Through Operation of an Image-Based Velocity Estimation System for Mars Landing  

Science Journals Connector (OSTI)

During the Mars Exploration Rover (MER) landings, the Descent Image Motion Estimation System (DIMES) was used for horizontal velocity estimation. The DIMES algorithm combined measurements from a descent camera, a radar altimeter, and an inertial measurement ... Keywords: DIMES, Mars Exploration Rover, Mars lander, computer vision, feature tracking, robotics, velocity estimation

Andrew Johnson; Reg Willson; Yang Cheng; Jay Goguen; Chris Leger; Miguel Sanmartin; Larry Matthies

2007-09-01T23:59:59.000Z

97

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 1 Airborne Wind Energy Based on Dual Airfoils  

E-Print Network (OSTI)

airfoil systems, but they are less advantageous at very large scales. Index Terms--Airborne wind energy Wind Energy (AWE) paradigm proposes to eliminate the structural elements not directly involved in power Wind Energy [17]. Crosswind flight extracts power from the airflow by flying an airfoil tethered

98

Quantitative Modeling and Estimation in Systems Biology using Fluorescent Reporter Systems  

E-Print Network (OSTI)

) Fluorescence intensity profile obtained for IL-6-STAT3 system ............. 45 9. Estimated STAT3 profiles from Tikhonov regularization and truncated SVD ........ 47 10. Illustration for choosing the excitation wavelength for a mixture containing CFP and GFP... (data obtained from an online database (Biosciences, 2000) for CFP and GFP variants that have maximum emission and excitation wavelengths reasonably close to pAmCyan and pCM18 protein plasmids, respectively...

Bansal, Loveleena

2013-12-10T23:59:59.000Z

99

Automatic history matching of dual porosity system with wellbore storage and skin constant rate case  

E-Print Network (OSTI)

Vector notation Greek svmbols Interporosity flow shape factor, ft Viscosity, cp Porosity, fraction , ~mP 4 ~ ~ Oimensionless transfer coefficient kf (m~)f Oimensionless storativity ratio (mcf) $ me) Itl n Unit normal vector 66 REFERENCES 1... to the system of equations, the equations become d pod dS d'o 2 v'w- "of ? Sf['"'I' ? A 0 (A23) and Dm Dm( o 0) ( where 73 (, m'f jf ('m'fjf f (m'f) (A25) kf From the initial condition PD(rD, 0) = 0 PDF ( 0, 0) - 0 (rD. 0) = 0 Rearranging equation...

Olarewaju, Joseph Shola

1985-01-01T23:59:59.000Z

100

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

organic Rankine cycle waste heat power conversion system. ”Cycle (ORC) System for Waste Heat Recovery. ” Journal ofRankine Cycles in Waste Heat Uti- lizing Processes. ”

Luong, David

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Cost estimation of functional and physical changes made to complex systems  

E-Print Network (OSTI)

Current cost estimation practices rely on statistically relating physical parameters of a system to historical cost data. Unfortunately, this method is unable to effectively communicate the increasing complexity of system ...

Jeziorek, Peter Nicholas, 1981-

2005-01-01T23:59:59.000Z

102

Analysis of power estimation techniques in CDMA systems  

E-Print Network (OSTI)

) is the estimator of i-th user's j-t. h paralneter Zl, (j). Figures 1I ? 14 show the performance of the three t, echniques for SNR=--10, 0, 10 anrl 20dB with different number of users. For I, he EM algorithm, thc initial values are zeros and the number...

Pei, Ying

1999-01-01T23:59:59.000Z

103

ESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0  

E-Print Network (OSTI)

of Vibration and Acoustics, 131 (4) 041005, 2009 Measurement of damping forces, such as dry frictionESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0 B@egr.msu.edu ABSTRACT A method of estimating damping parameters for multi- degree-of-freedom vibration systems

Feeny, Brian

104

A climate sensitivity estimate using Bayesian fusion of instrumental observations and an Earth System model  

E-Print Network (OSTI)

sensitivity estimate using Bayesian fusion of instrumental observations and an Earth System model, J. Geophys System model Roman Olson,1 Ryan Sriver,1 Marlos Goes,2,3 Nathan M. Urban,4,5 H. Damon Matthews,6 MuraliA climate sensitivity estimate using Bayesian fusion of instrumental observations and an Earth

105

Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant  

DOE Patents (OSTI)

System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processing of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.

Kumar, Aditya; Shi, Ruijie; Dokucu, Mustafa

2013-09-17T23:59:59.000Z

106

State estimation of probabilistic hybrid systems with particle filters  

E-Print Network (OSTI)

Robotic and embedded systems have become increasingly pervasive in every-day applications, ranging from space probes and life support systems to autonomous rovers. In order to act robustly in the physical world, robotic ...

Funiak, Stanislav, 1978-

2004-01-01T23:59:59.000Z

107

Pumping System Measurements To Estimate Energy Savings: Why and How  

E-Print Network (OSTI)

Measuring performance parameters (flow rate, pressures, and power) for existing systems is essential to understanding how both the pump(s) and system are actually performing. Examples of reasons why actual measurements are critical and practical...

Casada, D.

2007-01-01T23:59:59.000Z

108

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

141 Open ORC Systemfor Open Organic Rankine Cycle (ORC)138 Evaporatorof an Organic Rankine Cycle (ORC) System for Waste Heat

Luong, David

2013-01-01T23:59:59.000Z

109

Millimeter-Wave Concurrent Dual-Band BiCMOS RFIC Transmitter for Radar and Communication Systems  

E-Print Network (OSTI)

) ............................................................................................ 128 5.6 Current waveform in the analysis of class A, B, and C PAs ...................... 130 5.7 Maximum efficiency versus conduction angle ........................................... 132 5.8 Main blocks of a concurrent dual-band PA... tuning range (b) ........ 182 6.6 Simulated tunable impulses ........................................................................ 183 xv 6.7 Measured impulse duration versus control voltage .................................... 184 6...

Huynh, Cuong Phu Minh 1976-

2012-11-21T23:59:59.000Z

110

Precipitable water structure in tropical systems as estimated from TOVS  

E-Print Network (OSTI)

and OLR . . . 28 67 85 6. Annual and semi-annual cycle effect estimates for selected areas . . . 89 LIST OF FIGURES Figure Page 1. PW fields from three models for 8 Feb 1988. Contour intervals are. 5 cm. . 34 2. PW fields from three models for 10... Feb 1988. Contour intervals are. 5 cm. 35 3. PW field for 9 Jan 1988. Contour intervals are . 5 cm. . 37 4. OLR field for 9 Jan 1988. Contour intervals are 25 Wm-2. . . . 38 5. PW fields from three models for 15 Aug 1990. Contour intervals are . 5...

Hatfield, Eric

2012-06-07T23:59:59.000Z

111

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

for Open Organic Rankine Cycle (ORC)138 Evaporatorand Simulation of an Organic Rankine Cycle (ORC) System forControl of Organic Rankine Cycles in Waste Heat Uti- lizing

Luong, David

2013-01-01T23:59:59.000Z

112

Economics of dual purpose production alternatives in the Mexican tropics  

E-Print Network (OSTI)

Technological, marketing, and financial alternatives to the dual purpose production system in Central Veracruz, Mexico were analyzed to assess their economic viability. A large dual purpose production operation was characterized in a baseline...

Ochoa-Ochoa, Rene Federico

1997-01-01T23:59:59.000Z

113

Mobile sensor systems for field estimation and "hot spot" identification  

E-Print Network (OSTI)

Robust, low-cost mobile sensing enables effective monitoring and management of urban environment and infrastructure which contributes towards a sustainable future. While mobile sensor systems have attracted significant ...

Kumar, Sumeet, Ph. D. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

114

Statistical estimation of water distribution system pipe break risk  

E-Print Network (OSTI)

The deterioration of pipes in urban water distribution systems is of concern to water utilities throughout the world. This deterioration generally leads to pipe breaks and leaks, which may result in reduction in the water-carrying capacity...

Yamijala, Shridhar

2009-05-15T23:59:59.000Z

115

Comparative study of State Estimation of Fuel Cell Hybrid System Using UKF and EKF  

E-Print Network (OSTI)

of the most promising fuel cell technologies is the Solid Oxide Fuel Cell (SOFC) due to its solid state design nonlinear ex- amples are considered to compare the state estimation using UKF and EKF. A Solid Oxide FuelComparative study of State Estimation of Fuel Cell Hybrid System Using UKF and EKF Rambabu Kandepu

Foss, Bjarne A.

116

An Experiment to Improve Cost Estimation and Project Tracking for Software and Systems Integration Projects  

E-Print Network (OSTI)

An Experiment to Improve Cost Estimation and Project Tracking for Software and Systems Integration to improve cost estimation and project tracking. 1. Introduction In order to remain competitive, ICL (as well for integration projects, to reduce time to market and to reduce costs without detriment to the quality

Henderson, Peter

117

THE GREEN FUNCTION ESTIMATES FOR STRONGLY ELLIPTIC SYSTEMS OF SECOND ORDER  

E-Print Network (OSTI)

THE GREEN FUNCTION ESTIMATES FOR STRONGLY ELLIPTIC SYSTEMS OF SECOND ORDER STEVE HOFMANN AND SEICK KIM Abstract. We establish existence and pointwise estimates of fundamental so- lutions and Green perturbations of a single real equation. 1. Introduction In this article, we study Green's functions (or Green

Hofmann, Steve

118

Design of Dual-Road Transportable Portal Monitoring System for Visible Light and Gamma-Ray Imaging  

SciTech Connect

The use of radiation sensors as portal monitors is increasing due to heightened concerns over the smuggling of fissile material. Transportable systems that can detect significant quantities of fissile material that might be present in vehicular traffic are of particular interest, especially if they can be rapidly deployed to different locations. To serve this application, we have constructed a rapid-deployment portal monitor that uses visible-light and gamma-ray imaging to allow simultaneous monitoring of multiple lanes of traffic from the side of a roadway. The system operation uses machine vision methods on the visible-light images to detect vehicles as they enter and exit the field of view and to measure their position in each frame. The visible-light and gamma-ray cameras are synchronized which allows the gamma-ray imager to harvest gamma-ray data specific to each vehicle, integrating its radiation signature for the entire time that it is in the field of view. Thus our system creates vehicle-specific radiation signatures and avoids source confusion problems that plague non-imaging approaches to the same problem. Our current prototype instrument was designed for measurement of upto five lanes of freeway traffic with a pair of instruments, one on either side of the roadway. Stereoscopic cameras are used with a third alignment camera for motion compensation and are mounted on a 50 deployable mast. In this paper we discuss the design considerations for the machine-vision system, the algorithms used for vehicle detection and position estimates, and the overall architecture of the system. We also discuss system calibration for rapid deployment. We conclude with notes on preliminary performance and deployment.

Karnowski, Thomas Paul [ORNL; Cunningham, Mark F [Lawrence Livermore National Laboratory (LLNL); Goddard Jr, James Samuel [ORNL; Cheriyadat, Anil M [ORNL; Hornback, Donald Eric [ORNL; Fabris, Lorenzo [ORNL; Kerekes, Ryan A [ORNL; Ziock, Klaus-Peter [ORNL; Bradley, Eric Craig [ORNL; Chesser, Joel B [ORNL; Marchant, William [University of California, Berkeley

2010-01-01T23:59:59.000Z

119

DUAL-MODE PROPULSION SYSTEM ENABLING CUBESAT EXPLORATION OF THE SOLAR SYSTEM NASA Innovative Advanced Concepts (NIAC) Phase I Final Report  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (~1,000 kgs to LEO) can be targeted. This, in effect, allows for beneficial explora-tion to be conducted within limited budgets. Researchers at the Center for Space Nuclear Re-search (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO. The proposed radioisotope-based system would leverage the high specific energies [J/kg] associated with radioisotope materials and enhance their inherent low specific powers [W/g]. This is accomplished by accumulating thermal energy from nuclear decay within a central core over time. This allows for significant amounts of power to be transferred to a flowing gas over short periods of time. In the proposed configuration the stored energy can be utilized in two ways: (1) with direct propellant injection to the core, the energy can be converted into thrust through the use of a converging-diverging nozzle and (2) by flowing a working fluid through the core and subsequent Brayton engine, energy within the core can be converted to electrical energy. The first scenario achieves moderate ranges of thrust, but at a higher Isp than traditional chemical-based systems. The second scenario allows for the production of electrical power, which is then available for electric-based propulsion. Additionally, once at location the production of electrical power can be dedicated to the payload’s communication system for data transfer. Ultimately, the proposed dual-mode propulsion platform capitalizes on the benefits of two types of propulsion methods – the thrust of thermal propulsion ideal for quick orbital maneuvers and the specific impulse of electric propulsion ideal for efficient inter-planetary travel. Previous versions of this RTR-based concept have been studied for various applications [NETS 1-3]. The current version of this concept is being matured through a NASA Innovative Advanced Concepts (NIAC) Phase I grant, awarded for FY 2014. In this study the RTR concept is being developed to deliver a 6U CubeSat payload to the orbit of the Saturnian moon - Enceladus. Additionally, this study will develop an entire mission architecture for Enceladus targeting a total allowable launch mass of 1,000 kg.

Nathan Jerred; Troy Howe; Adarsh Rajguru; Dr. Steven Howe

2014-06-01T23:59:59.000Z

120

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...  

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

10 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2010 Update This report is the fourth annual update of a comprehensive...

Note: This page contains sample records for the topic "dual system estimation" 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

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...  

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

Application: 2009 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application: 2009 Update This report is the third annual update of a...

122

On adaptive transmission, signal detection and channel estimation for multiple antenna systems  

E-Print Network (OSTI)

This research concerns analysis of system capacity, development of adaptive transmission schemes with known channel state information at the transmitter (CSIT) and design of new signal detection and channel estimation schemes with low complexity...

Xie, Yongzhe

2004-11-15T23:59:59.000Z

123

Improvements to a queue and delay estimation algorithm utilized in video imaging vehicle detection systems  

E-Print Network (OSTI)

Video Imaging Vehicle Detection Systems (VIVDS) are steadily becoming the dominant method for the detection of vehicles at a signalized traffic approach. This research is intended to investigate the improvement of a queue and delay estimation...

Cheek, Marshall Tyler

2007-09-17T23:59:59.000Z

124

DFMA Cost Estimates of Fuel-Cell/Reformer Systems  

E-Print Network (OSTI)

Car Technical Barriers Addressed: Fuel Flexible Processors Technical Barriers N: Cost Component designs of complete automotive FC power systems: · Onboard gasoline fuel processor and PEM fuel cell ·Fuel cell stacks ·Air supply and humidification ·Thermal management ·Water management ·Fuel Supply

125

Seismic Intensity Estimation of Tall Buildings in Earthquake Early Warning System  

E-Print Network (OSTI)

Seismic Intensity Estimation of Tall Buildings in Earthquake Early Warning System M. H. Cheng & T warning system is currently being tested through the California Integrated Seismic Network (CISN) (http: earthquake early warning system, tall buildings, seismic intensity 1. INTRODUCTION In California, United

Greer, Julia R.

126

Improved blue response and efficiency of A-Si:H solar cells deposited from disilane using a dual-chamber plasma system  

SciTech Connect

Thin film amorphous silicon solar cells with glass/SnO/sub 2//p/i/n/Al structures and 6 to 7% AM1 conversion efficiencies were fabricated at rapid deposition rates in a newly constructed dual-chamber glow discharge deposition system. The 500 nm thick intrinsic layer was deposited at the rate of 1.7 nm/s using disilane (Si/sub 2/H/sub 6/)-helium mixtures. This deposition rate is an order of magnitude greater than conventional high efficiency amorphous silicon solar cell depositions. Residual boron doping effects at the p/i interface can severely degrade cell performance particularly when the intrinsic layer is deposited in one chamber of the dual-chamber system and the intrinsic layer is deposited in the other chamber that is free of boron contaminants. Parameters such as electrode spacing, Si/sub 2/H/sub 6/ partial pressure and flow rate were optimized to produce uniform deposition over large areas. At the substrate temperature T/sub s/ selected for solar cell intrinsic layer deposition, the spin density was measured to be a minimum at 5 x 10/sup 15//cm/sup 3/. For a given T/sub s/, an intrinsic layer deposited from Si/sub 2/H/sub 6/ absorbs fewer photons and can generate less current under solar simulation than a similar film produced from monosilane. Identical solar cells were deposited in either the single-chamber mode or the dual-chamber mode for comparison. Single-chamber mode cells perform poorly over the visible wavelengths and hence produce low short circuit currents. The dual-chamber mode cells show a significant improvement in blue response and a factor of two increase in short circuit current over the single-chamber mode cells. Under short circuit conditions, 15 mA/cm/sup 2/ was generated from rapidly deposited (1.7 nm/s) cells from disilane and 18 mA/cm/sup 2/ from low deposition rate (0.18 nm/s) monosilane cells. These values are comparable to or better than those reported for similar cells by other groups.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

127

Inexpensive dual beam turbidimeter  

Science Journals Connector (OSTI)

...Articles Articles Inexpensive dual beam turbidimeter Cathie Lubell Thomas Barry Edward Brody Gregory Hearn This dual beam turbidimeter...74D728B5-2B21-11D7-8648000102C1865D Inexpensive dual beam turbidimeter Lubell Cathie Author Barry Thomas Author Brody Edward Author Hearn...

Cathie Lubell; Thomas Barry; Edward Brody; Gregory Hearn

128

Harmonics and inter harmonics estimation of DFIG based standalone wind power system by parametric techniques  

Science Journals Connector (OSTI)

Abstract This paper presents application of parametric techniques (Estimation of signal parameter by rotational invariance techniques (ESPRIT), Root multiple signal classification (Root MUSIC)) for the estimation of harmonics/inter harmonics produced by wind generator under constant, variable rotor speed, load imbalance. Accuracy of estimation by parametric techniques is checked on synthetic signal as well as signal extracted from DFIG based standalone system with constant rotor speed and balanced load condition. Further sliding window concept is applied to parametric techniques to estimate the harmonics/inter harmonics under variable rotor speed and load unbalance. Series of simulation results demonstrate the advantages of the sliding window ESPRIT over sliding window Root MUSIC in the estimation of harmonics and inter harmonics under variable rotor speed as well as load unbalance condition.

Sanjay Agrawal; Soumya R. Mohanty; Vineeta Agarwal

2015-01-01T23:59:59.000Z

129

PDE Estimation Techniques for Advanced Battery Management Systems -Part II: SOH Identification  

E-Print Network (OSTI)

vehi- cles and renewable energy resources is battery energy storage. Advanced battery systems representPDE Estimation Techniques for Advanced Battery Management Systems - Part II: SOH Identification S examines identification algorithms for state- of-health (SOH) related parameters in advanced batteries

Krstic, Miroslav

130

Unfolding-based corrector estimates for a reaction-diffusion system predicting concrete corrosion  

E-Print Network (OSTI)

We use the periodic unfolding technique to derive corrector estimates for a reaction-diffusion system describing concrete corrosion penetration in the sewer pipes. The system, defined in a periodically-perforated domain, is semi-linear, partially dissipative, and coupled via a non-linear ordinary differential equation posed on the solid-water interface at the pore level. After discussing the solvability of the pore scale model, we apply the periodic unfolding techniques (adapted to treat the presence of perforations) not only to get upscaled model equations, but also to prepare a proper framework for getting a convergence rate (corrector estimates) of the averaging procedure.

Fatima, Tasnim; Ptashnyk, Mariya

2011-01-01T23:59:59.000Z

131

Recent developments in parameter estimation and structure identification of biochemical and genomic systems  

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

Recent Recent developments in parameter estimation and structure identification of biochemical and genomic systems I-Chun Chou * , Eberhard O. Voit Integrative BioSystems Institute and The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA a r t i c l e i n f o Article history: Received 2 October 2008 Received in revised form 6 March 2009 Accepted 15 March 2009 Available online 25 March 2009 Keywords: Parameter estimation Network identification Inverse modeling Biochemical Systems Theory a b s t r a c t The organization, regulation and dynamical responses of biological systems are in many cases too com- plex to allow intuitive predictions and require the support of mathematical modeling for quantitative assessments and a reliable understanding of system functioning. All steps of constructing

132

Assessment of the need for dual indoor/outdoor warning systems and enhanced tone alert technologies in the Chemical Stockpile Emergency Preparedness Program  

SciTech Connect

The need for a dual indoor/outdoor warning system as recommended by the program guidance and Alert and Notification (A N) standard for the Chemical Stockpile Emergency Preparedness Program is analyzed in this report. Under the current program standards, the outdoor warning system consists of omnidirectional sirens and the new indoor system would be an enhanced tone alert (TA) radio system. This analysis identifies various tone-alert technologies, distribution options, and alternative siren configurations. It also assesses the costs and benefits of the options and analyzes what appears to best meet program needs. Given the current evidence, it is recommended that a 10-dB siren system and the special or enhanced TA radio be distributed to each residence and special institution in the immediate response zone as preferred the A N standard. This approach minimizes the cost of maintenance and cost of the TA radio system while providing a high degree of reliability for indoor alerting. Furthermore, it reaches the population (residential and institutional) in the greatest need of indoor alerting.

Sorensen, J.H.

1992-05-01T23:59:59.000Z

133

Assessment of the need for dual indoor/outdoor warning systems and enhanced tone alert technologies in the Chemical Stockpile Emergency Preparedness Program  

SciTech Connect

The need for a dual indoor/outdoor warning system as recommended by the program guidance and Alert and Notification (A&N) standard for the Chemical Stockpile Emergency Preparedness Program is analyzed in this report. Under the current program standards, the outdoor warning system consists of omnidirectional sirens and the new indoor system would be an enhanced tone alert (TA) radio system. This analysis identifies various tone-alert technologies, distribution options, and alternative siren configurations. It also assesses the costs and benefits of the options and analyzes what appears to best meet program needs. Given the current evidence, it is recommended that a 10-dB siren system and the special or enhanced TA radio be distributed to each residence and special institution in the immediate response zone as preferred the A&N standard. This approach minimizes the cost of maintenance and cost of the TA radio system while providing a high degree of reliability for indoor alerting. Furthermore, it reaches the population (residential and institutional) in the greatest need of indoor alerting.

Sorensen, J.H.

1992-05-01T23:59:59.000Z

134

An optimized Line Sampling method for the estimation of the failure probability of nuclear passive systems  

E-Print Network (OSTI)

The quantitative reliability assessment of a thermal-hydraulic (T-H) passive safety system of a nuclear power plant) to operate [5] and, thus, are expected to improve the safety of nuclear power plants because of simplicity long) T-H code simulations that must be performed (one for each sample) for the statistical estimation

Paris-Sud XI, Université de

135

XI. DIFFUSEGLOBAL CORRELATIONS: SEASONAL VARIATIONS Estimating the performance of a solar system  

E-Print Network (OSTI)

is measured on a horizontal surface and intensity on the tilted collector surface is calculated via a two39 XI. DIFFUSE­GLOBAL CORRELATIONS: SEASONAL VARIATIONS Estimating the performance of a solar system requires an accurate assessment of incident solar radiation. Ordinarily, solar radiation

Oregon, University of

136

Estimating Self-Sustainability in Peer-to-Peer Swarming Systems Daniel S. Menasche  

E-Print Network (OSTI)

Estimating Self-Sustainability in Peer-to-Peer Swarming Systems Daniel S. Menasch´e· , Antonio A. A this dependence. For this purpose, we propose a new metric, namely swarm self-sustainability. A swarm is referred to as self-sustaining if all its blocks are collectively held by peers; the self-sustainability of a swarm

Massachusetts at Amherst, University of

137

Ground-penetrating-radar-assisted saturation and permeability estimation in bimodal systems  

E-Print Network (OSTI)

and to subsequently design an efficient and reliable remediation plan. Soil water content monitoring is importantGround-penetrating-radar-assisted saturation and permeability estimation in bimodal systems Susan S from ground penetrating radar (GPR), a noninvasive, high-resolution geophysical method. The procedures

Hubbard, Susan

138

Power systems: State estimation. (Latest citations from the EI Compendex plus database). Published Search  

SciTech Connect

The bibliography contains citations concerning the monitoring and control of power systems using state estimation techniques. The citations cover analytical techniques, including algorithms, simulations, and problems, such as bad data and nonlinearities. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1993-08-01T23:59:59.000Z

139

Using estimated risk to develop stimulation strategies for Enhanced Geothermal Systems John Douglas* and Hideo Aochi  

E-Print Network (OSTI)

-defined acceptable risk thresholds the injection is: increased (if the risk is below the amber level), decreased (if could lead to both acceptable levels of risk and increased permeability. hal-00921141,version1-19Dec20131 Using estimated risk to develop stimulation strategies for Enhanced Geothermal Systems John

Paris-Sud XI, Université de

140

Reduced Measurement-space Dynamic State Estimation (ReMeDySE) for Power Systems  

E-Print Network (OSTI)

data are checked and calculated. 2) Observability determination. Various sensor measure- ments. Typically, a state estimator receives telemetered measurements from a Supervisory Control And Data the system dynamics. This changed with the intro- duction of Phasor Measurement Unit (PMU). PMUs primarily

Bishop, Gary

Note: This page contains sample records for the topic "dual system estimation" 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

Dual surface interferometer  

DOE Patents (OSTI)

A double-pass interferometer is provided which allows direct measurement of relative displacement between opposed surfaces. A conventional plane mirror interferometer may be modified by replacing the beam-measuring path cube-corner reflector with an additional quarterwave plate. The beam path is altered to extend to an opposed plane mirrored surface and the reflected beam is placed in interference with a retained reference beam split from dual-beam source and retroreflected by a reference cube-corner reflector mounted stationary with the interferometer housing. This permits direct measurement of opposed mirror surfaces by laser interferometry while doubling the resolution as with a conventional double-pass plane mirror laser interferometer system.

Pardue, R.M.; Williams, R.R.

1980-09-12T23:59:59.000Z

142

dual-phase-ceramic-asu | netl.doe.gov  

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

Targets Systems Analysis Regulatory Drivers Program Plan Capture Handbook Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Project No.:...

143

Protection of Li Anodes Using Dual Phase Electrolytes  

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

cells with high energy anode and dual-phase electrolyte systems Partners BASF SE, Germany * Development of Li-S battery materials 3 Relevance. Project Objectives. * Develop a...

144

4162 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 28, NO. 4, NOVEMBER 2013 Power System State Estimation Using PMUs With  

E-Print Network (OSTI)

. NOMENCLATURE: PMU Phasor measurement unit. SCADA Supervisory control and data acquisition. GPS Global, Kalman filtering, phase mismatch, phasor measurement unit (PMU), state estimation, synchronization]­[7]. The traditional supervisory control and data acquisition (SCADA) system has a low reporting rate and requires

Nehorai, Arye

145

Accurately Estimating the State of a Geophysical System with Sparse Observations: Predicting the Weather  

E-Print Network (OSTI)

Utilizing the information in observations of a complex system to make accurate predictions through a quantitative model when observations are completed at time $T$, requires an accurate estimate of the full state of the model at time $T$. When the number of measurements $L$ at each observation time within the observation window is larger than a sufficient minimum value $L_s$, the impediments in the estimation procedure are removed. As the number of available observations is typically such that $L \\ll L_s$, additional information from the observations must be presented to the model. We show how, using the time delays of the measurements at each observation time, one can augment the information transferred from the data to the model, removing the impediments to accurate estimation and permitting dependable prediction. We do this in a core geophysical fluid dynamics model, the shallow water equations, at the heart of numerical weather prediction. The method is quite general, however, and can be utilized in the analysis of a broad spectrum of complex systems where measurements are sparse. When the model of the complex system has errors, the method still enables accurate estimation of the state of the model and thus evaluation of the model errors in a manner separated from uncertainties in the data assimilation procedure.

Zhe An; Daniel Rey; Henry D. I. Abarbanel

2014-05-11T23:59:59.000Z

146

Quantitative Cyber Risk Reduction Estimation Methodology for a Small Scada Control System  

SciTech Connect

We propose a new methodology for obtaining a quick quantitative measurement of the risk reduction achieved when a control system is modified with the intent to improve cyber security defense against external attackers. The proposed methodology employs a directed graph called a compromise graph, where the nodes represent stages of a potential attack and the edges represent the expected time-to-compromise for differing attacker skill levels. Time-to-compromise is modeled as a function of known vulnerabilities and attacker skill level. The methodology was used to calculate risk reduction estimates for a specific SCADA system and for a specific set of control system security remedial actions. Despite an 86% reduction in the total number of vulnerabilities, the estimated time-to-compromise was increased only by about 3 to 30% depending on target and attacker skill level.

Miles A. McQueen; Wayne F. Boyer; Mark A. Flynn; George A. Beitel

2006-01-01T23:59:59.000Z

147

Numerical estimation model of energy conversion for small hybrid solar–wind system  

Science Journals Connector (OSTI)

This article presents a numerical model which can estimate the energy conversions of separate and hybrid solar–wind systems under variable weather. The model integrates the equations associated with the characteristics of photovoltaic generation, wind energy conversion, energy balance, and battery bank, and uses the local database for radiation, wind speed, and ambient temperature. Once the equation associated with the characteristics of load is given, the numerical model can estimate the monthly and yearly powers output of the separate and hybrid solar–wind systems provided with different configurations. As a fundamental research, the presentations of daily profiles of solar radiation, wind energy, and ambient temperature are explained in detail, and the combination of the characteristics of wind energy conversion and battery bank is determined. The condition of hybrid action is shown, and the solutions are certain to be found. The operation strategies of separate and hybrid systems are also presented.

Shun Ching Lee

2012-01-01T23:59:59.000Z

148

X-Ray Spectra for Bone Quality Assessment Using Energy Dispersive Counting and Imaging Detectors with Dual Energy Method  

Science Journals Connector (OSTI)

The aim of the present study was the optimization of dual energy x-ray spectra through the estimation of ... monoenergetic x-ray beams provides the optimum dual energy pairs minimizing the CV. Single and double ....

P. Sotiropoulou; G. Fountos; N. Martini…

2014-01-01T23:59:59.000Z

149

Mode Initialization for On-line Estimation of Power System Electromechanical Modes  

SciTech Connect

Measurement-based mode estimation methods are utilized to estimate electromechanical modes of a power system using phasor measurement units (PMU) data. These methods need to extract a certain amount of information before they can give useable mode estimation. Traditionally, the information is gathered solely from measurement data. Priori mode information from other resources (e.g. model eigenvalue analysis, engineering knowledge) are not fully utilized. For real time application, this means that mode estimation takes time to converge. By adding a mode regularization term in the objective function, this paper proposes a mode initialization method to include priori mode information in a regularized robust recursive least squares (R3LS) algorithm for on-line mode estimation. The proposed method is tested using a simple model, a 17 machine model and is shown to be able to shorten the convergence period of the R3LS algorithm. The proposed method is also applied on the measurement data recorded right before a major power outage in the western North American Grid on August 10th 1996 to show its potential applica-tion in detecting an approaching small signal stability problem.

Zhou, Ning; Trudnowski, Daniel; Pierre, John W.

2009-03-18T23:59:59.000Z

150

Modeling, Estimation, and Control in Energy Systems: Batteries & Demand Response  

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

Modeling, Modeling, Estimation, and Control in Energy Systems: Batteries & Demand Response Scott Moura Assistant Professor Civl & Environmental Engineering University of California, Berkeley EETD | LBNL Scott Moura | UC Berkeley Control, Batts, DR December 4, 2013 | Slide 1 Source: Vaclav Smil Estimates from Energy Transitions Scott Moura | UC Berkeley Control, Batts, DR December 4, 2013 | Slide 2 Energy Initiatives Denmark 50% wind penetration by 2025 Brazil uses 86% renewables China's aggressive energy/carbon intensity reduction EV Everywhere SunShot Green Button Zero emissions vehicle (ZEV) 33% renewables by 2020 Go Solar California Scott Moura | UC Berkeley Control, Batts, DR December 4, 2013 | Slide 3 Energy Systems of Interest Energy storage Smart Grids (e.g., batteries) (e.g., demand response) Scott Moura | UC Berkeley Control, Batts, DR December 4, 2013 | Slide 4 Energy

151

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2008 Update  

Fuel Cell Technologies Publication and Product Library (EERE)

This report estimates fuel cell system cost for systems produced in the years 2006, 2010, and 2015, and is the second annual update of a comprehensive automotive fuel cell cost analysis.

152

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2008 Update  

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

Report estimates fuel cell system cost for systems produced in the years 2006, 2010, and 2015, and is the second annual update of a comprehensive automotive fuel cell cost analysis.

153

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2007 Update  

Fuel Cell Technologies Publication and Product Library (EERE)

This report estimates fuel cell system cost for systems produced in the years 2007, 2010, and 2015, and is the first annual update of a comprehensive automotive fuel cell cost analysis.

154

Evaluation of performance of combined heat and power systems with dual power generation units (D-CHP).  

E-Print Network (OSTI)

?? In this research, a new combined heat and power (CHP) system configuration has been proposed that uses two power generation units (PGU) operating simultaneously… (more)

Knizley, Alta Alyce

2013-01-01T23:59:59.000Z

155

Phase inductance estimation for switched reluctance motor using adaptive neuro-fuzzy inference system  

Science Journals Connector (OSTI)

A new method based on an adaptive neuro-fuzzy inference system (ANFIS) for estimating the phase inductance of switched reluctance motors (SRMs) is presented. The ANFIS has the advantages of expert knowledge of the fuzzy inference system and the learning capability of neural networks. A hybrid learning algorithm, which combines the least square method and the back propagation algorithm, is used to identify the parameters of the ANFIS. The rotor position and the phase current of the 6/4 pole SRM are used to predict the phase inductance. The phase inductance results predicted by the ANFIS are in excellent agreement with the results of the finite element method.

Ferhat Daldaban; Nurettin Ustkoyuncu; Kerim Guney

2006-01-01T23:59:59.000Z

156

Multi-area power system state estimation utilizing boundary measurements and phasor measurement units ( PMUs)  

E-Print Network (OSTI)

estimation is explained for a simple serial estimator. Then the thesis shows how conventional measurements and newer, more accurate PMU measurements work within the framework of weighted least squares estimation. Next, the multi-area state estimator...

Freeman, Matthew A

2006-10-30T23:59:59.000Z

157

New perspectives on the damage estimation for buried pipeline systems due to seismic wave propagation  

SciTech Connect

Over the past three decades, seismic fragility fonnulations for buried pipeline systems have been developed following two tendencies: the use of earthquake damage scenarios from several pipeline systems to create general pipeline fragility functions; and, the use of damage scenarios from one pipeline system to create specific-system fragility functions. In this paper, the advantages and disadvantages of both tendencies are analyzed and discussed; in addition, a summary of what can be considered the new challenges for developing better pipeline seismic fragility formulations is discussed. The most important conclusion of this paper states that more efforts are needed to improve the estimation of transient ground strain -the main cause of pipeline damage due to seismic wave propagation; with relevant advances in that research field, new and better fragility formulations could be developed.

Pineda Porras, Omar Andrey [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

158

Systems, methods and computer readable media for estimating capacity loss in rechargeable electrochemical cells  

DOE Patents (OSTI)

A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware periodically samples charge characteristics of the electrochemical cell. The computing system periodically determines cell information from the charge characteristics of the electrochemical cell. The computing system also periodically adds a first degradation characteristic from the cell information to a first sigmoid expression, periodically adds a second degradation characteristic from the cell information to a second sigmoid expression and combines the first sigmoid expression and the second sigmoid expression to develop or augment a multiple sigmoid model (MSM) of the electrochemical cell. The MSM may be used to estimate a capacity loss of the electrochemical cell at a desired point in time and analyze other characteristics of the electrochemical cell. The first and second degradation characteristics may be loss of active host sites and loss of free lithium for Li-ion cells.

Gering, Kevin L.

2013-06-18T23:59:59.000Z

159

The Steam System Assessment Tool (SSAT): Estimating Steam System Energy, Cost, and Emission Savings  

E-Print Network (OSTI)

The U. S. Department of Energy's (DOE) Industrial Technology Program BestPractices Steam effort is developing a number of software tools to assist industrial energy users to improve the efficiency of their steam system. A major new Best...

Wright, A.; Bealing, C.; Eastwood, A.; Tainsh, R.; Hahn, G.; Harrell, G.

160

Quantitative Risk reduction estimation Tool For Control Systems, Suggested Approach and Research Needs  

SciTech Connect

For the past year we have applied a variety of risk assessment technologies to evaluate the risk to critical infrastructure from cyber attacks on control systems. More recently, we identified the need for a stand alone control system risk reduction estimation tool to provide owners and operators of control systems with a more useable, reliable, and credible method for managing the risks from cyber attack. Risk is defined as the probability of a successful attack times the value of the resulting loss, typically measured in lives and dollars. Qualitative and ad hoc techniques for measuring risk do not provide sufficient support for cost benefit analyses associated with cyber security mitigation actions. To address the need for better quantitative risk reduction models we surveyed previous quantitative risk assessment research; evaluated currently available tools; developed new quantitative techniques [17] [18]; implemented a prototype analysis tool to demonstrate how such a tool might be used; used the prototype to test a variety of underlying risk calculational engines (e.g. attack tree, attack graph); and identified technical and research needs. We concluded that significant gaps still exist and difficult research problems remain for quantitatively assessing the risk to control system components and networks, but that a useable quantitative risk reduction estimation tool is not beyond reach.

Miles McQueen; Wayne Boyer; Mark Flynn; Sam Alessi

2006-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


161

A PARALLAX DISTANCE AND MASS ESTIMATE FOR THE TRANSITIONAL MILLISECOND PULSAR SYSTEM J1023+0038  

SciTech Connect

The recently discovered transitional millisecond pulsar system J1023+0038 exposes a crucial evolutionary phase of recycled neutron stars for multiwavelength study. The system, comprising the neutron star itself, its stellar companion, and the surrounding medium, is visible across the electromagnetic spectrum from the radio to X-ray/gamma-ray regimes and offers insight into the recycling phase of millisecond pulsar evolution. Here, we report on multiple-epoch astrometric observations with the Very Long Baseline Array (VLBA) which give a system parallax of 0.731 {+-} 0.022 milliarcseconds (mas) and a proper motion of 17.98 {+-} 0.05 mas yr{sup -1}. By combining our results with previous optical observations, we are able to use the parallax distance of 1368{sup +42}{sub -{sub 39}} pc to estimate the mass of the pulsar to be 1.71 {+-} 0.16 M{sub Sun }, and we are also able to measure the three-dimensional space velocity of the system to be 126 {+-} 5 km s{sup -1}. Despite the precise nature of the VLBA measurements, the remaining {approx}3% distance uncertainty dominates the 0.16 M{sub Sun} error on our mass estimate.

Deller, A. T. [Netherlands Institute for Radio Astronomy (ASTRON), 7990-AA Dwingeloo (Netherlands); Archibald, A. M.; Kaspi, V. M. [Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8 (Canada); Brisken, W. F. [National Radio Astronomy Observatory, Socorro, NM 87801 (United States); Chatterjee, S. [Astronomy Department, Cornell University, Ithaca, NY 14853 (United States); Janssen, G. H.; Lyne, A. G.; Stappers, B. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom); Lorimer, D.; McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Ransom, S. [National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States); Stairs, I. H. [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada)

2012-09-10T23:59:59.000Z

162

Electrochemical sensing systems for arsenate estimation by oxidation of l-cysteine  

Science Journals Connector (OSTI)

In this study, rapid electrochemical sensing systems for detection of arsenate by oxidation of l-cysteine are proposed. Three different sensing systems comprising of screen-printed electrode and standard electrodes were used for this study. The detector element i.e. l-cysteine was immobilized on the working electrodes of the transducers by in-situ polymerization of acylamide. The electrocatalytic oxidation of l-cysteine was performed by cyclic voltammentry and amperometry. All the systems presented linear response range up to 30 ?g L?1 of arsenic. The sensors were able to estimate arsenic below 10 ?g L?1 with a detection limit of 1.2–4.6 ?g L?1.

Priyabrata Sarkar; Suchanda Banerjee; Dipankar Bhattacharyay; Anthony P.F. Turner

2010-01-01T23:59:59.000Z

163

BETC information management system with focus on ROS estimation. Final report  

SciTech Connect

A special-purpose information data base system has been designed by Science Applications, Inc. for the Bartlesville Energy Technology Center to support the technical staff in the areas of Enhanced Oil Recovery (EOR) and Residual Oil Saturation Estimation (ROS). The system has been built by a multidisciplinary team of designers combining a series of iterative design steps and pilot software development tasks to produce a unique information retrieval system. Studies of information usage patterns and information perceptions by BETC terms (i.e., a subject taxonomy) emphasizing EOR/ROS and its related subject domain. The analysis of usage patterns also revealed that four basic data types were required most often by potential system users. These were: (1) numeric files; (2) bibliographic citations and abstracts; (3) project information such as schedules and budgets; and (4) references to persons that were authorities in various relevant topical areas. The need for a unique subject taxonomy and for four different data types resulted in the design of a system that will permit the retrieval of information by searching the subject taxonomy, selecting a subject term, or terms, and determining the appropriate data types in one-step searching. To accommodate a diverse user group, the system incorporates a range of man/machine interface features including both menu selection and command language capabilities. Pilot software has been developed to provide early utility at BETC and to carry out the iterative design and implementation sequence needed to capture the dynamic needs of the EOR/ROS information environment.

Willoughby, J.K.; Gardner, J.A.; Heath, S.B.; Kehler, M.A.

1980-11-01T23:59:59.000Z

164

Basic Parameter Estimation of Binary Neutron Star Systems by the Advanced LIGO/Virgo Network  

Science Journals Connector (OSTI)

Within the next five years, it is expected that the Advanced LIGO/Virgo network will have reached a sensitivity sufficient to enable the routine detection of gravitational waves. Beyond the initial detection, the scientific promise of these instruments relies on the effectiveness of our physical parameter estimation capabilities. A major part of this effort has been toward the detection and characterization of gravitational waves from compact binary coalescence, e.g., the coalescence of binary neutron stars. While several previous studies have investigated the accuracy of parameter estimation with advanced detectors, the majority have relied on approximation techniques such as the Fisher Matrix which are insensitive to the non-Gaussian nature of the gravitational wave posterior distribution function. Here we report average statistical uncertainties that will be achievable for strong detection candidates (S/N = 20) over a comprehensive sample of source parameters. We use the Markov Chain Monte Carlo based parameter estimation software developed by the LIGO/Virgo Collaboration with the goal of updating the previously quoted Fisher Matrix bounds. We find the recovery of the individual masses to be fractionally within 9% (15%) at the 68% (95%) credible intervals for equal-mass systems, and within 1.9% (3.7%) for unequal-mass systems. We also find that the Advanced LIGO/Virgo network will constrain the locations of binary neutron star mergers to a median uncertainty of 5.1 deg2 (13.5 deg2) on the sky. This region is improved to 2.3 deg2 (6 deg2) with the addition of the proposed LIGO India detector to the network. We also report the average uncertainties on the luminosity distances and orbital inclinations of strong detections that can be achieved by different network configurations.

Carl L. Rodriguez; Benjamin Farr; Vivien Raymond; Will M. Farr; Tyson B. Littenberg; Diego Fazi; Vicky Kalogera

2014-01-01T23:59:59.000Z

165

System and method for motor speed estimation of an electric motor  

SciTech Connect

A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium.

Lu, Bin (Kenosha, WI); Yan, Ting (Brookfield, WI); Luebke, Charles John (Sussex, WI); Sharma, Santosh Kumar (Viman Nagar, IN)

2012-06-19T23:59:59.000Z

166

BETC information management system with focus on ROS estimation. Final report, Phase II  

SciTech Connect

A special-purpose information data base system has been designed by Science Applications, Inc. for the Bartlesville Energy Technology Center to support the technical staff in the areas of Enhanced Oil Recovery (EOR) and Residual Oil Saturation Estimation (ROS). The system has been built by a multidisciplinary team of designers combining a series of iterative design steps and pilot software development tasks to produce a unique information retrieval system. The diversity of information requirements and the unavailability of organized information resources to support EOR/ROS prompted the need for this system and its specialized functional design. Studies of information usage patterns and information perceptions by BETC staff resulted in the development of a hierarchic arrangement of subject terms (i.e., a subject taxonomy) emphasizing EOR/ROS and its related subject domain. The analysis of usage patterns also revealed that four basic data types were required most often by potential system users. These were: (1) numeric files; (2) bibliographic citations and abstracts; (3) project information such as schedules and budgets; and (4) reference to persons that were authorities in various relevant topical areas. The need for a unique subject taxonomy and for four different data types resulted in the design of a system that will permit the retrieval of information by searching the subject taxonomy, selecting a subject term, or terms, and determining the appropriate data types in one-step searching. To accommodate a diverse user group, the system incorporates a range of man/machine interface features including both menu selection and command language capabilities. In Phase II of this project, a production system was implemented, numeric and bibliographic data were loaded, a citation template was developed, and guidelines for a data base administration function within the Center were developed.

Willoughby, J.K.; Gardner, J.A.; Heath, S.B.; Kehler, M.A.

1981-12-01T23:59:59.000Z

167

SINGLE AND DUAL LAYER THIN FILM BULGE TESTING  

E-Print Network (OSTI)

film windows that are used in Next Generation Lithography masks and certain MEMS devices. The bulge testing method measures the mechanical properties of a thin film by isolating it in a thin film window of the system. Figure 6 Dual Layer Thin Film Membrane Window For a dual layer membrane the effective total

Huston, Dryver R.

168

An Evaluation of the Impacts of Network Bandwidth and Dual-Core Processors on  

E-Print Network (OSTI)

and scaling on a large-scale dual-core system. We provide results for multiple representative DOE applicationsAn Evaluation of the Impacts of Network Bandwidth and Dual-Core Processors on Scalability Ron hardware. Single-core 2.0 GHz AMD Opteron pro- cessors were replaced with dual-core 2.4 GHz AMD Opterons

Brightwell, Ron

169

York Electric Cooperative - Dual Fuel Heat Pump Rebate Program | Department  

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

York Electric Cooperative - Dual Fuel Heat Pump Rebate Program York Electric Cooperative - Dual Fuel Heat Pump Rebate Program York Electric Cooperative - Dual Fuel Heat Pump Rebate Program < Back Eligibility Commercial Fed. Government Industrial Local Government Nonprofit Residential State Government Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Maximum Rebate 2 systems per household Program Info State South Carolina Program Type Utility Rebate Program Rebate Amount Dual Fuel Heat Pumps: $400/system Provider York Electric Cooperative, Inc York Electric Cooperative, Inc. (YEC) offers a $400 rebate to members who install a dual fuel heat pump in homes or businesses. The rebates are for primary residence and/or commercial and industrial locations. The incentive is for the property owner only, meaning that renters/tenants are not

170

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application  

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

Mass Production Cost Estimation for Direct H 2 PEM Fuel Cell Systems for Automotive Applications: 2008 Update March 26, 2009 v.30.2021.052209 Prepared by: Brian D. James & Jeffrey A. Kalinoski One Virginia Square 3601 Wilson Boulevard, Suite 650 Arlington, Virginia 22201 703-243-3383 Prepared for: Contract No. GS-10F-0099J to the U.S. Department of Energy Energy Efficiency and Renewable Energy Office Hydrogen, Fuel Cells & Infrastructure Technologies Program Foreword Energy security is fundamental to the mission of the U.S. Department of Energy (DOE) and hydrogen fuel cell vehicles have the potential to eliminate the need for oil in the transportation sector. Fuel cell vehicles can operate on hydrogen, which can be produced domestically, emitting less greenhouse gas and pollutants than

171

Dual use power supply development  

Science Journals Connector (OSTI)

Size weight efficiency and reliability define space power systems. Then years ago NASA re?emphasized that missions such as Space Station needed cost effective critical technologies one being power conversion. Thus NASA began to emphasize ‘‘dual?use’’ technology through its center for Commercial Development of Space (mid 1980s). This CCDS program funded research and development efforts needed for future space missions as well as terrestrial applications for commercial markets. Maxwell and Auburn University (Space Power Institute) jointly developed reliable power systems for manned space projects as well as commercial applications of high power high voltage switchmode power supplies. These serve the medical scientific and industrial markets (lasers accelerators and intense light sources). These applications required improvements in power density efficiency regulation reliability and cost effectiveness to be successful. One of NASA’s first programs at Auburn and Maxwell was a high frequency series resonant power converter optimized for commercial applications. It also meets the needs of space missions (additional space flight qualification is needed). This power converter topology demonstrates dual?use technology for power density power?to?weight regulation reliability and cost effectiveness. All goals were exceeded for both space and terrestrial applications. This was the first product of NASA’s CCDS program producing a family of high voltage capacitor charging power supplies. Maxwell’s CCDS capacitor power supplies are achieving greater acceptance demonstrating the value of the CCDS program.

Alan C. Kolb; Bryan E. Strickland

1995-01-01T23:59:59.000Z

172

THE SOLAR NEIGHBORHOOD. XXIII. CCD PHOTOMETRIC DISTANCE ESTIMATES OF SCR TARGETS-77 M DWARF SYSTEMS WITHIN 25 pc  

SciTech Connect

We present CCD photometric distance estimates of 100 SCR (SuperCOSMOS RECONS) systems with {mu} {>=} 0.''18 yr{sup -1}, 29 of which are new discoveries previously unpublished in this series of papers. These distances are estimated using a combination of new VRI photometry acquired at CTIO and JHK magnitudes extracted from 2MASS. The estimates are improvements over those determined using photographic plate BRI magnitudes from SuperCOSMOS plus JHK, as presented in the original discovery papers. In total, 77 of the 100 systems investigated are predicted to be within 25 pc. If all 77 systems are confirmed to have {pi}{sub trig} {>=} 40 mas, this sample would represent a 23% increase in M dwarf systems nearer than 25 pc in the southern sky.

Winters, Jennifer G.; Henry, Todd J.; Jao, Wei-Chun [Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302-4106 (United States); Subasavage, John P. [Cerro Tololo Inter-American Observatory, Casilla 603, La Serena (Chile); Finch, Charlie T. [United States Naval Observatory, Washington, DC 20392-5420 (United States); Hambly, Nigel C., E-mail: winters@chara.gsu.edu, E-mail: thenry@chara.gsu.edu, E-mail: jao@chara.gsu.edu, E-mail: jsubasavage@ctio.noao.edu, E-mail: finch@usno.navy.mil, E-mail: nch@roe.ac.uk [Scottish Universities Physics Alliance (SUPA), Institute of Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom)

2011-01-15T23:59:59.000Z

173

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment  

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

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment DOE-funded research, in collaboration with Allison Buses and General Motors Corporation has led to the commercialization of a dramatically different hybrid transmission system for heavy-duty and light-duty applications. The Dual-Mode or Two-Mode hybrid system is an infinitely variable speed hybrid transmission that works with the engine and battery system and automatically chooses to operate in a parallel or series hybrid path to maximize efficiency and minimize emissions, fuel consumption and noise. Parallel and Series hybrid configurations are found on most hybrid vehicles today, both with their own pluses and minuses. The Dual- Mode/Two-Mode systems uses the positive characteristics from both systems to maximize fuel

174

Cooperative advertising in a dual channel supply chain  

Science Journals Connector (OSTI)

The focus of this study is cooperative (co-op) advertising and the impact it has on the dual channel supply chain. We obtain equilibrium pricing and co-op advertising policies under two different competitive scenarios: Bertrand and Stackelberg equilibrium. We also compare the profit gains under these two marketing games. Based on our results, we propose the optimal strategies that system members should adopt in a dual channel competition. We also illustrate that by strategically implementing a cooperative advertising strategy under different market structures, both the system players can effectively improve their overall profits in a dual channel supply chain management.

Ruiliang Yan; Sanjoy Ghose; Amit Bhatnagar

2006-01-01T23:59:59.000Z

175

Develop the dual fuel conversion system for high output, medium speed diesel engines. Quarterly report number 1, September 1--December 31, 1996  

SciTech Connect

Energy Conversions Incorporated has made substantial progress on the EMD-710 dual-fuel test cell in the first quarter of the project. The project is on schedule and has not met with any major roadblocks that would derail the planned timetable. Please note that much of the work done started before the funding arrived, and therefore those items are not included in the financial expenditures for the quarter.

NONE

1997-01-08T23:59:59.000Z

176

Optimization of a dual acting, magnetically driven, linear actuator  

E-Print Network (OSTI)

In this study the geometry of a dual acting, magnetically driven, linear motion actuator will be optimized. This will be accomplished by modeling the system through a set of differential equations to be solved in Matlab. An ANSYS finite element...

Willerton, Justin Ryan

2012-06-07T23:59:59.000Z

177

A Two-Stage Kalman Filter Approach for Robust and Real-Time Power System State Estimation  

SciTech Connect

As electricity demand continues to grow and renewable energy increases its penetration in the power grid, realtime state estimation becomes essential for system monitoring and control. Recent development in phasor technology makes it possible with high-speed time-synchronized data provided by Phasor Measurement Units (PMU). In this paper we present a two-stage Kalman filter approach to estimate the static state of voltage magnitudes and phase angles, as well as the dynamic state of generator rotor angles and speeds. Kalman filters achieve optimal performance only when the system noise characteristics have known statistical properties (zero-mean, Gaussian, and spectrally white). However in practice the process and measurement noise models are usually difficult to obtain. Thus we have developed the Adaptive Kalman Filter with Inflatable Noise Variances (AKF with InNoVa), an algorithm that can efficiently identify and reduce the impact of incorrect system modeling and/or erroneous measurements. In stage one, we estimate the static state from raw PMU measurements using the AKF with InNoVa; then in stage two, the estimated static state is fed into an extended Kalman filter to estimate the dynamic state. Simulations demonstrate its robustness to sudden changes of system dynamics and erroneous measurements.

Zhang, Jinghe; Welch, Greg; Bishop, Gary; Huang, Zhenyu

2014-04-01T23:59:59.000Z

178

Robustness of a Neural Network Model for Power Peak Factor Estimation in Protection Systems  

SciTech Connect

This work presents results of robustness verification of artificial neural network correlations that improve the real time prediction of the power peak factor for reactor protection systems. The input variables considered in the correlation are those available in the reactor protection systems, namely, the axial power differences obtained from measured ex-core detectors, and the position of control rods. The correlations, based on radial basis function (RBF) and multilayer perceptron (MLP) neural networks, estimate the power peak factor, without faulty signals, with average errors between 0.13%, 0.19% and 0.15%, and maximum relative error of 2.35%. The robustness verification was performed for three different neural network correlations. The results show that they are robust against signal degradation, producing results with faulty signals with a maximum error of 6.90%. The average error associated to faulty signals for the MLP network is about half of that of the RBF network, and the maximum error is about 1% smaller. These results demonstrate that MLP neural network correlation is more robust than the RBF neural network correlation. The results also show that the input variables present redundant information. The axial power difference signals compensate the faulty signal for the position of a given control rod, and improves the results by about 10%. The results show that the errors in the power peak factor estimation by these neural network correlations, even in faulty conditions, are smaller than the current PWR schemes which may have uncertainties as high as 8%. Considering the maximum relative error of 2.35%, these neural network correlations would allow decreasing the power peak factor safety margin by about 5%. Such a reduction could be used for operating the reactor with a higher power level or with more flexibility. The neural network correlation has to meet requirements of high integrity software that performs safety grade actions. It is shown that the correlation is a very simple algorithm that can be easily codified in software. Due to its simplicity, it facilitates the necessary process of validation and verification. (authors)

Souza, Rose Mary G.P.; Moreira, Joao M.L. [Centro Tecnologico da Marinha em Sao Paulo - CTMSP, avenida Prof. Lineu Prestes, 2468 - Butanta, Sao Paulo (Brazil)

2006-07-01T23:59:59.000Z

179

A quasi-diagonal approach to the estimation of Lyapunov spectra for spatio-temporal systems from multivariate time series  

E-Print Network (OSTI)

We describe methods of estimating the entire Lyapunov spectrum of a spatially extended system from multivariate time-series observations. Provided that the coupling in the system is short range, the Jacobian has a banded structure and can be estimated using spatially localised reconstructions in low embedding dimensions. This circumvents the ``curse of dimensionality'' that prevents the accurate reconstruction of high-dimensional dynamics from observed time series. The technique is illustrated using coupled map lattices as prototype models for spatio-temporal chaos and is found to work even when the coupling is not strictly local but only exponentially decaying.

R. Carretero-González; S. Ørstavik; J. Stark

2000-04-06T23:59:59.000Z

180

Dual Plane Imaging  

E-Print Network (OSTI)

We outline a technique called Dual Plane Imaging which should significantly improve images which would otherwise be blurred due to atmospheric turbulence. The technique involves capturing all the spatial, directional and temporal information about the arriving photons and processing the data afterwards to produce the sharpened images. The technique has particular relevance for imaging at around 400-1000nm on extremely large telescopes (ELTs).

Parry, Ian

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

A quantum algorithm to efficiently sample the work distribution and to estimate the free energy of quantum systems  

E-Print Network (OSTI)

We present a new method to measure work and to efficiently sample its probability distribution with fixed precision. The method can be used to estimate free energies on a quantum computer. It is based on three facts: (i) The probability to detect work $w$ in the state $\\rho$ is $P(w)={\\rm tr}[\\rho \\,W(w)]$, where $W(w)$ are positive operators satisfying $\\int dw \\,W(w)=I$. As $W(w)$ define a POVM (positive operator valued measure), work measurement always reduces to a projective measurement performed at a single time on an enlarged system. (ii) Work can be estimated using a variant of the "phase estimation algorithm" which is such that work $w$ is detected as the outcome of the single time measurement with probability $P(w)$. (iii) The efficient sampling of $P(w)$ can be combined with fluctuation theorems to estimate differences between the free energy of quantum states.

Augusto J. Roncaglia; Federico Cerisola; Juan Pablo Paz

2014-09-12T23:59:59.000Z

182

A neoclassical realist analysis of American ‘dual containment’ policy in the Persian Gulf: 1991-2001.  

E-Print Network (OSTI)

??This thesis examines the American policy of ‘dual containment’: the assumption by the US of a predominant role in the security system of the Persian… (more)

Edwards, Alex

2013-01-01T23:59:59.000Z

183

Regularity criteria and uniform estimates for the Boussinesq system with the temperature-dependent viscosity and thermal diffusivity  

E-Print Network (OSTI)

In this paper we establish some regularity criteria for the 3D Boussinesq system with the temperature-dependent viscosity and thermal diffusivity. We also obtain some uniform estimates for the corresponding 2D case when the fluid viscosity coefficient is a positive constant.

Jishan Fan; Fucai Li; Gen Nakamura

2012-10-09T23:59:59.000Z

184

A Generalized Subspace Least Mean Square Method for High-resolution Accurate Estimation of Power System Oscillation Modes  

SciTech Connect

A Generalized Subspace-Least Mean Square (GSLMS) method is presented for accurate and robust estimation of oscillation modes from exponentially damped power system signals. The method is based on orthogonality of signal and noise eigenvectors of the signal autocorrelation matrix. Performance of the proposed method is evaluated using Monte Carlo simulation and compared with Prony method. Test results show that the GSLMS is highly resilient to noise and significantly dominates Prony method in tracking power system modes under noisy environments.

Zhang, Peng; Zhou, Ning; Abdollahi, Ali

2013-09-10T23:59:59.000Z

185

Dual-Band and Dual-Polarization Patch Antenna with High Isolation Characteristic  

E-Print Network (OSTI)

1 Dual-Band and Dual-Polarization Patch Antenna with High Isolation Characteristic Dong-Hyuk Choi and Seong-Ook Park, Member, IEEE Abstract--A patch antenna with dual-band and dual-polarization operation--Coplanar waveguide (CPW) resonant cell, dual-band, dual-polarization, isolation, patch antenna I. INTRODUCTION

Park, Seong-Ook

186

Feature-based investment cost estimation based on modular design of a continuous pharmaceutical manufacturing system  

E-Print Network (OSTI)

Previous studies of continuous manufacturing processes have used equipment-factored cost estimation methods to predict savings in initial plant investment costs. In order to challenge and validate the existing methods of ...

Collins, Donovan (Donovan Scott)

2011-01-01T23:59:59.000Z

187

Measurement calibration/tuning & topology processing in power system state estimation  

E-Print Network (OSTI)

the implementation of this algorithm. A concise substation model is defined for this purpose. A friendly user interface that incorporates the two-stage algorithm into the conventional state estimator is developed. The performances of the two-stage state... estimation algorithms rely on accurate determination of suspect substations. A comprehensive identification procedure is described in chapter III. In order to evaluate the proposed procedure, a topology error library is created. Several identification...

Zhong, Shan

2005-02-17T23:59:59.000Z

188

A H-infinity Fault Detection and Diagnosis Scheme for Discrete Nonlinear System Using Output Probability Density Estimation  

SciTech Connect

In this paper, a H-infinity fault detection and diagnosis (FDD) scheme for a class of discrete nonlinear system fault using output probability density estimation is presented. Unlike classical FDD problems, the measured output of the system is viewed as a stochastic process and its square root probability density function (PDF) is modeled with B-spline functions, which leads to a deterministic space-time dynamic model including nonlinearities, uncertainties. A weighting mean value is given as an integral function of the square root PDF along space direction, which leads a function only about time and can be used to construct residual signal. Thus, the classical nonlinear filter approach can be used to detect and diagnose the fault in system. A feasible detection criterion is obtained at first, and a new H-infinity adaptive fault diagnosis algorithm is further investigated to estimate the fault. Simulation example is given to demonstrate the effectiveness of the proposed approaches.

Zhang Yumin; Lum, Kai-Yew [Temasek Laboratories, National University of Singapore, Singapore 117508 (Singapore); Wang Qingguo [Depa. Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

2009-03-05T23:59:59.000Z

189

Improved proton computed tomography by dual modality image reconstruction  

SciTech Connect

Purpose: Proton computed tomography (CT) is a promising image modality for improving the stopping power estimates and dose calculations for particle therapy. However, the finite range of about 33 cm of water of most commercial proton therapy systems limits the sites that can be scanned from a full 360° rotation. In this paper the authors propose a method to overcome the problem using a dual modality reconstruction (DMR) combining the proton data with a cone-beam x-ray prior. Methods: A Catphan 600 phantom was scanned using a cone beam x-ray CT scanner. A digital replica of the phantom was created in the Monte Carlo code Geant4 and a 360° proton CT scan was simulated, storing the entrance and exit position and momentum vector of every proton. Proton CT images were reconstructed using a varying number of angles from the scan. The proton CT images were reconstructed using a constrained nonlinear conjugate gradient algorithm, minimizing total variation and the x-ray CT prior while remaining consistent with the proton projection data. The proton histories were reconstructed along curved cubic-spline paths. Results: The spatial resolution of the cone beam CT prior was retained for the fully sampled case and the 90° interval case, with the MTF = 0.5 (modulation transfer function) ranging from 5.22 to 5.65?linepairs/cm. In the 45° interval case, the MTF = 0.5 dropped to 3.91?linepairs/cm For the fully sampled DMR, the maximal root mean square (RMS) error was 0.006 in units of relative stopping power. For the limited angle cases the maximal RMS error was 0.18, an almost five-fold improvement over the cone beam CT estimate. Conclusions: Dual modality reconstruction yields the high spatial resolution of cone beam x-ray CT while maintaining the improved stopping power estimation of proton CT. In the case of limited angles, the use of prior image proton CT greatly improves the resolution and stopping power estimate, but does not fully achieve the quality of a 360° proton CT scan.

Hansen, David C., E-mail: dch@ki.au.dk; Bassler, Niels [Experimental Clinical Oncology, Aarhus University, 8000 Aarhus C (Denmark)] [Experimental Clinical Oncology, Aarhus University, 8000 Aarhus C (Denmark); Petersen, Jørgen Breede Baltzer [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark)] [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark); Sørensen, Thomas Sangild [Computer Science, Aarhus University, 8000 Aarhus C, Denmark and Clinical Medicine, Aarhus University, 8200 Aarhus N (Denmark)] [Computer Science, Aarhus University, 8000 Aarhus C, Denmark and Clinical Medicine, Aarhus University, 8200 Aarhus N (Denmark)

2014-03-15T23:59:59.000Z

190

Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates  

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

Integration of Global Positioning System and Scanning Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates V. Mattioli and P. Basili Department of Electronic and Information Engineering University of Perugia Perugia, Italy E. R. Westwater Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado Introduction In recent years the Global Positioning System (GPS) has proved to be a reliable instrument for measuring precipitable water vapor (PWV) (Bevis et al. 1992), offering an independent source of information on water vapor when compared with microwave radiometers (MWRs), and/or radiosonde

191

Breast Density Assessment in Adolescent Girls Using Dual-Energy X-ray Absorptiometry: A Feasibility Study  

Science Journals Connector (OSTI)

...Assessment in Adolescent Girls Using Dual-Energy X-ray Absorptiometry: A Feasibility...explored a commercially available dual-energy X-ray absorptiometer (DXA) system...Prev 2008;17(7):1709-13) Dual-energy X-ray Absorptiometry|breast density...

John A. Shepherd; Serghei Malkov; Bo Fan; Aurelie Laidevant; Rachel Novotny; Gertraud Maskarinec

2008-07-01T23:59:59.000Z

192

Develop the dual fuel conversion system for high output, medium speed diesel engines. Quarterly report number 2, January 1--March 31, 1997  

SciTech Connect

Energy Conversions Incorporated has continued to work on the EMD-710 dual-fuel test cell in the second quarter of the project. The project is on schedule and is sticking to their original timeline. The tasks performed and percent complete are spark prechamber work--50% done; diesel prechamber work--50% done; gas compressor--100% complete; port injection work--50% complete; hydraulic gas inlet valve work--30% complete; knock board modifications--75% complete; test documentation--50% complete; record data from navy generator and offshore rigs--50% complete and single cylinder testing--50% complete. The authors continued to do much of their parts testing on single cylinder gas operation. The single cylinder testing will likely continue throughout the 710 development.

NONE

1997-04-11T23:59:59.000Z

193

Basic Parameter Estimation of Binary Neutron Star Systems by the Advanced LIGO/Virgo Network  

E-Print Network (OSTI)

Within the next five years, it is expected that the Advanced LIGO/Virgo network will have reached a sensitivity sufficient to enable the routine detection of gravitational waves. Beyond the initial detection, the scientific promise of these instruments relies on the effectiveness of our physical parameter estimation capabilities. The majority of this effort has been towards the detection and characterization of gravitational waves from compact binary coalescence, e.g. the coalescence of binary neutron stars. While several previous studies have investigated the accuracy of parameter estimation with advanced detectors, the majority have relied on approximation techniques such as the Fisher Matrix. Here we report the statistical uncertainties that will be achievable for optimal detection candidates (SNR = 20) using the full parameter estimation machinery developed by the LIGO/Virgo Collaboration via Markov-Chain Monte Carlo methods. We find the recovery of the individual masses to be fractionally within 9% (15%)...

Rodriguez, Carl L; Raymond, Vivien; Farr, Will M; Littenberg, Tyson; Fazi, Diego; Kalogera, Vicky

2013-01-01T23:59:59.000Z

194

Vision-based head pose estimation and interactivity analysis : algorithms, systems and evaluation  

E-Print Network (OSTI)

and hybrid system Rotation (degrees) Method Pitch Yaw RollHybrid System Jitter (degrees) Pitch (degrees) Yaw (degrees)three discrete yaws [63]. A more recent system trained ?ve

Murphy-Chutorian, Erik Marshall

2009-01-01T23:59:59.000Z

195

Sharp decay estimates for an anisotropic linear semigroup and applications to the SQG and inviscid Boussinesq systems  

E-Print Network (OSTI)

At the core of this article is an improved, sharp dispersive estimate for the anisotropic linear semigroup $e^{R_1 t}$ arising in both the study of the dispersive SQG equation and the inviscid Boussinesq system. We combine the decay estimate with a blow-up criterion to show how dispersion leads to long-time existence of solutions to the dispersive SQG equation, improving the results obtained using hyperbolic methods. In the setting of the inviscid Boussinesq system it turns out that linearization around a specific stationary solution leads to the same linear semigroup, so that we can make use of analogous techniques to obtain stability of the stationary solution for an increased timespan.

Tarek M. Elgindi; Klaus Widmayer

2014-10-06T23:59:59.000Z

196

Methodology for Estimating ton-Miles of Goods Movements for U.S. Freight Mulitimodal Network System  

SciTech Connect

Ton-miles is a commonly used measure of freight transportation output. Estimation of ton-miles in the U.S. transportation system requires freight flow data at disaggregated level (either by link flow, path flows or origin-destination flows between small geographic areas). However, the sheer magnitude of the freight data system as well as industrial confidentiality concerns in Census survey, limit the freight data which is made available to the public. Through the years, the Center for Transportation Analysis (CTA) of the Oak Ridge National Laboratory (ORNL) has been working in the development of comprehensive national and regional freight databases and network flow models. One of the main products of this effort is the Freight Analysis Framework (FAF), a public database released by the ORNL. FAF provides to the general public a multidimensional matrix of freight flows (weight and dollar value) on the U.S. transportation system between states, major metropolitan areas, and remainder of states. Recently, the CTA research team has developed a methodology to estimate ton-miles by mode of transportation between the 2007 FAF regions. This paper describes the data disaggregation methodology. The method relies on the estimation of disaggregation factors that are related to measures of production, attractiveness and average shipments distances by mode service. Production and attractiveness of counties are captured by the total employment payroll. Likely mileages for shipments between counties are calculated by using a geographic database, i.e. the CTA multimodal network system. Results of validation experiments demonstrate the validity of the method. Moreover, 2007 FAF ton-miles estimates are consistent with the major freight data programs for rail and water movements.

Oliveira Neto, Francisco Moraes [ORNL] [ORNL; Chin, Shih-Miao [ORNL] [ORNL; Hwang, Ho-Ling [ORNL] [ORNL

2013-01-01T23:59:59.000Z

197

Spatially Dependent Parameter Estimation and Nonlinear Data Assimilation by Autosynchronization of a System of Partial Differential Equations  

E-Print Network (OSTI)

Given multiple images that describe chaotic reaction-diffusion dynamics, parameters of a PDE model are estimated using autosynchronization, where parameters are controlled by synchronization of the model to the observed data. A two-component system of predator-prey reaction-diffusion PDEs is used with spatially dependent parameters to benchmark the methods described. Applications to modelling the ecological habitat of marine plankton blooms by nonlinear data assimilation through remote sensing is discussed.

Sean Kramer; Eric Bollt

2012-07-19T23:59:59.000Z

198

Evaluation of a Modeling System for S-Phase Estimation in Breast Cancer by Flow Cytometry  

Science Journals Connector (OSTI)

...Protocol B. injection of ethyl carbamate midway through BrdUrd infusion; Protocol C...population treated with ethyl car bamate midway between the 2 cycles (Protocol B) estimates...the beginning of the first cycle (Ai; midway between the first and second cycles...

Lynn G. Dressler; Larry Seamer; Marilyn A. Owens; Gary M. Clark; William L. McGuire

1987-10-15T23:59:59.000Z

199

Estimating actual evapotranspiration for a coupled human environment system: sensitivity to drought  

E-Print Network (OSTI)

, the overall aim of this study is to quantify regional water consumption using remote sensing. More Remote sensing can estimate ET as a residual of the energy balance: Friction Velocity Roughness Length Aerodynamic Resistance Net radiation (Rn) Soil Heat Flux (G) T Hot & Cold Pixels Sensible Heat Flux (H

Hall, Sharon J.

200

Estimation and prediction of travel time from loop detector data for intelligent transportation systems applications  

E-Print Network (OSTI)

for the accuracy of data from a series of detectors for conservation of vehicles, in addition to the commonly adopted checks. ?? A theoretical model based on traffic flow theory for travel time estimation for both off-peak and peak traffic conditions using flow...

Vanajakshi, Lelitha Devi

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

The World as a Dual Josephson Junction  

E-Print Network (OSTI)

We examine some of the implications of the field-theoretical mechanism for the localization of gauge fields on hypersurfaces in higher-dimensional bulk space-time. This mechanism exploits the analogy between confinement and dual superconductivity. In the simplest case of a photon localized on a (2+1)-dimensional surface in a (3+1)-dimensional bulk, we argue that the system behaves like a dual Josephson junction. This implies that the effective gauge theory on the surface is not free, but displays weak confinement with a linear potential. We comment on the relevance of our results for the realistic case of a (3+1)-dimensional surface in a space-time with one or more extra dimensions.

N. Tetradis

2000-02-24T23:59:59.000Z

202

Application of continuous wavelet transform to the impact location estimation of the Loose Parts Monitoring System (LPMS)  

Science Journals Connector (OSTI)

The Loose Parts Monitoring System (LPMS) provides information on the location of a loosened or detached metal impacted onto the inner surface of a primary pressure boundary and on a mass or energy of the impact signal. For the conventional system, it is popular to employ the group delay among the sensors installed within 3 ft range from the impact source in a collection zone as stated in the Reg. Guide 1.133. However, there exist inherent errors for the estimation of the true location of the impact since it is highly dependent on the plant personnel's decision to determine the arrival time differences of the generated wave group among the neighbouring sensors. To overcome this problem in this study, the two-dimensional approach has been proposed and applied to effectively estimate the arrival time differences of the impact signal by using continuous wavelet transform which is one of the linear time-frequency analysis methods. The experiment has been implemented on the plate model and the steam generator's lower part in a real plant using steel balls. It is expected that the reliability of the location estimation could be enhanced when the proposed time-frequency method is introduced into the LPMS system.

Jin-Ho Park; Jeong-Han Lee

2006-01-01T23:59:59.000Z

203

Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including a  

E-Print Network (OSTI)

Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including that minimizes losses in the transmission and costs in the generation of a hydroelectric power system, formulated such perturbing parameter. Keywords-- Hydroelectric power system, Network flow, Predispatch, Primal-dual interior

Oliveira, Aurélio R. L.

204

Statistical Estimation of Two-Body Hydrodynamic Properties Using System Identification  

E-Print Network (OSTI)

information concerning the response characteristics of such systems. The current study demonstrates that the analysis of these data using a combination of statistical tools and system identification techniques can efficiently recover the main hydrodynamic...

Xie, Chen

2010-01-14T23:59:59.000Z

205

Using graph theory to resolve state estimator issues faced by deregulated power systems  

E-Print Network (OSTI)

.................................. 75 5.3 The global semantic dictionary for the SKW.................................... 77 5.4 The SKW with ontology connection knowledge .............................. 79 5.5 System entity relationships in a typical power market... centers and logistics departments. Information integration for such a system has become very challenging [49-55]. Common Information Model (CIM) is utilized for data exchange [53]. How to transform the legacy Energy Management System (EMS) system...

Lei, Jiansheng

2009-05-15T23:59:59.000Z

206

An optical time-delay estimate for the double gravitational lens system B1600+434  

E-Print Network (OSTI)

We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between April 1998 and November 1999. The photometry has been performed by simultaneous deconvolution of all the data frames, involving a numerical lens galaxy model. Four methods have been applied to determine the time delay between the two QSO components, giving a mean estimate of \\Delta_t = 51+/-4 days (95% confidence level). This is the fourth optical time delay ever measured. Adopting a Omega=0.3, Lambda=0 Universe and using the mass model of Maller et al. (2000), this time-delay estimate yields a Hubble parameter of H_0=52 (+14, -8) km s^-1 Mpc^-1 (95% confidence level) where the errors include time-delay as well as model uncertainties. There are time-dependent offsets between the two (appropriately shifted) light curves that indicate the presence of external variations due to microlensing.

I. Burud; J. Hjorth; A. O. Jaunsen; M. I. Andersen; H. Korhonen; J. W. Clasen; J. Pelt; F. P. Pijpers; P. Magain; R. OEstensen

2000-07-11T23:59:59.000Z

207

Estimating the impacts of wind power on power systems—summary of IEA Wind  

Science Journals Connector (OSTI)

Adding wind power to power systems will have beneficial impacts by reducing the emissions of electricity production and reducing the operational costs of the power system as less fuel is consumed in conventional power plants. Wind power will also have a capacity value to a power system. However, possible negative impacts will have to be assessed to make sure that they will only offset a small part of the benefits and also to ensure the security of the power system operation. An international forum for the exchange of knowledge of power system impacts of wind power has been formed under the IEA Implementing Agreement on Wind Energy. The Task 'Design and Operation of Power Systems with Large Amounts of Wind Power' is analyzing existing case studies from different power systems. There are a multitude of studies completed and ongoing related to the cost of wind integration. However, the results are not easy to compare. This paper describes the general issues of wind power impacts on power systems and presents a comparison of results from ten case studies on increased balancing needs due to wind power.

Hannele Holttinen

2008-01-01T23:59:59.000Z

208

Mass Production Cost Estimation of Direct Hydrogen PEM Fuel Cell Systems for Transportation Applications: 2012 Update  

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

This report is the sixth annual update of a comprehensive automotive fuel cell cost analysis conducted by Strategic Analysis under contract to the U.S. Department of Energy. This 2012 update will cover current status technology updates since the 2011 report, as well as introduce a 2012 bus system analysis considered alongside the automotive system.

209

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

E-Print Network (OSTI)

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

Rosso, Paolo

210

A Comparative Evaluation of Personality Estimation Algorithms for the TWIN Recommender System  

E-Print Network (OSTI)

Media Research Group ITT Dublin, Ireland John.Cardiff@ittdublin.ie Paolo Rosso NLE Lab searching among online resources. One of the areas of application of recommender systems is the online

Rosso, Paolo

211

Estimating train passenger load from automated data systems : application to London Underground  

E-Print Network (OSTI)

The purpose of this thesis is to assess the feasibility of identifying which trains individual passengers take to get from their origin to destination while travelling in a high frequency urban rail transportation system. ...

Paul, Elizabeth Cheriyamadam

2010-01-01T23:59:59.000Z

212

Accuracy Analysis on the Estimation of Camera Parameters for Active Vision Systems  

E-Print Network (OSTI)

system. Another purpose is to calibrate a robot (either a robot arm or a robot head) by using vision and robotics applications, extensive work has been devoted to the development of accurate

Chen, Sheng-Wei

213

PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR  

E-Print Network (OSTI)

PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR FOR USE IN A SPACE-COOLING SYSTEM REPORT (FAR) PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR FOR USE IN A SPACE COOLING Technologies · Environmentally-Preferred Advanced Generation · Energy-Related Environmental Research · Energy

214

Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving Horizon Estimation  

E-Print Network (OSTI)

tethered to the ground at a high velocity across the wind direction. Power can be generated by a, the first option is considered. Because it involves a much lighter structure, a major advantage of powerControl of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving

215

Estimation of tritium and helium inventory in the tritium handling system in Korea  

SciTech Connect

In Korea, the Wolsong Tritium Removal Facility (WTRF) is under construction to reduce the amount of tritium present in the moderator and coolant of the CANDU type Wolsong nuclear power plants. Recently, a study on the tritium handling system for recovery of the tritium collected from the WTRF was started. Some tritium would enter the steel of the container walls and subsequently decay to helium. This helium can deteriorate the mechanical properties of the material of the tritium handling system. To evaluate the tritium and helium inventory in the stainless steel wall of this system, the time-dependent diffusion equation was developed, solved and the results are presented in this paper. These results were compared to previous work that evaluated the tritium inventory in the stainless steel wall of 50-L tritium containers. Tritium and helium concentration profiles and the corresponding inventories were evaluated with respect to the various parameters such as exposure time, temperature, and partial pressure. After 24 years, the helium inventory in the wall of the tritium handling system exceeds the tritium inventory. (authors)

Yook, D.; Lee, S.; Lee, K. [Dept. of Nuclear Eng., KAIST, 373-1, Kusong-dong, Yusong-gu, Daejon 305-701 (Korea, Republic of); Song, K. M.; Shon, S. H. [KEPRI, 103-16 Munji-Dong, Yuseong-Gu, Daejeon, 305-380 (Korea, Republic of)

2008-07-15T23:59:59.000Z

216

Estimating Methods  

Directives, Delegations, and Requirements

Based on the project's scope, the purpose of the estimate, and the availability of estimating resources, the estimator can choose one or a combination of techniques when estimating an activity or project. Estimating methods, estimating indirect and direct costs, and other estimating considerations are discussed in this chapter.

1997-03-28T23:59:59.000Z

217

Thin film composite polyamide membrane parameters estimation for phenol-water system by reverse osmosis  

SciTech Connect

A commercial thin film composite polyamide reverse osmosis membrane is used to separate an aqueous phenol-water binary system. The separation data are analyzed using a combined film theory-solution-diffusion (CFSD) model and a combined film theory-Spiegler-Kedem (CFSK) model. In the present investigation a new phenomenon is observed: there exists a maximum in the rejection when it is plotted against the product flux through the membrane. This behavior is explained for both models. An equation for J{sub v,min}, which is the value of the product flux J{sub v} at which the rejection reaches a maximum, is derived from both models. Although the parameters for both models are consistent over the range of operating conditions, the CFSK model is more accurate for the phenol-water system.

Murthy, Z.V.P.; Gupta, S.K. [Indian Inst. of Tech., New Delhi (India). Chemical Engineering Dept.

1998-12-01T23:59:59.000Z

218

Assessing Monetary Valuation Methodologies for Estimating the Impacts of Climate Change in the Laguna de Rocha (Uruguay).  

E-Print Network (OSTI)

??The motivation for this study arose from the dual observation that there are very few estimates of the local costs of climate change in developing… (more)

Fanning, Andrew L.

2012-01-01T23:59:59.000Z

219

Dual recycling for GEO 600  

Science Journals Connector (OSTI)

Dual recycling is the combination of signal recycling and power recycling; both optical techniques improve the shot-noise-limited sensitivity of interferometric gravitational-wave detectors. In addition, signal recycling can reduce the loss of light power due to imperfect interference and allows us, in principle, to beat the standard quantum limit. The interferometric gravitational-wave detector GEO 600 is the first of the kilometre-scale detectors to use signal recycling. We have recently equipped the detector with a signal-recycling mirror with a transmittance of 1%. In this paper, we present details of the detector commissioning and the first locks of the dual-recycled interferometer.

H Grote; A Freise; M Malec; G Heinzel; B Willke; H Lück; K A Strain; J Hough; K Danzmann

2004-01-01T23:59:59.000Z

220

Dual gravity and E11  

E-Print Network (OSTI)

We consider the equation of motion in the gravity sector that arises from the non-linear realisation of the semi-direct product of E11 and its first fundamental representation, denoted by l1, in four dimensions. This equation is first order in derivatives and at low levels relates the usual field of gravity to a dual gravity field. When the generalised space-time is restricted to be the usual four dimensional space-time we show that this equation does correctly describe Einstein's theory at the linearised level. We also comment on previous discussions of dual gravity.

Peter West

2014-11-04T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Dual gravity and E11  

E-Print Network (OSTI)

We consider the equation of motion in the gravity sector that arises from the non-linear realisation of the semi-direct product of E11 and its first fundamental representation, denoted by l1, in four dimensions. This equation is first order in derivatives and at low levels relates the usual field of gravity to a dual gravity field. When the generalised space-time is restricted to be the usual four dimensional space-time we show that this equation does correctly describe Einstein's theory at the linearised level. We also comment on previous discussions of dual gravity.

West, Peter

2014-01-01T23:59:59.000Z

222

Utilization of Specific Attenuation for Tropical Rainfall Estimation in Complex Terrain  

Science Journals Connector (OSTI)

To improve the accuracy of quantitative precipitation estimation (QPE) in complex terrain, a new rainfall rate estimation algorithm has been developed and applied on two C-band dual-polarization radars in Taiwan. In this algorithm, the specific ...

Yadong Wang; Pengfei Zhang; Alexander V. Ryzhkov; Jian Zhang; Pao-Liang Chang

2014-12-01T23:59:59.000Z

223

Implementation of non-intrusive energy saving estimation for Volt/VAr control of smart distribution system  

Science Journals Connector (OSTI)

Abstract There has been a growing interest among power distribution utilities to explore smart grid technologies to improve the operational efficiency and reliability. As electricity distribution grid is evolving to become “smart”, energy demand reduction is one of the goals for the distribution utilities. In order to obtain this goal, utilities need to commit significant financial resources. Therefore, it became important to assess the benefit of new technologies such as Volt/VAr control (VVC). To compute the energy savings due to VVC implementation, existing algorithms are intrusive, and generally require altering the distribution system control settings and operating points, which is undesirable for system operator. On the other hand, these may require large amount of historical data. In this paper, implementation of a new non-intrusive energy saving estimation algorithm has been presented for integrated Volt/VAr control by Avista Utilities in Northwest USA. Developed algorithm utilizes measurements from smart distribution system. Develop algorithm allows studying the energy saving in long term as it requires no change in control settings of actual distribution system. Satisfactory results have been obtained and validated against field data from experiments on real feeders by Avista Utilities.

S. Chanda; F. Shariatzadeh; A. Srivastava; E. Lee; W. Stone; J. Ham

2014-01-01T23:59:59.000Z

224

DMSP-IEES: A Stochastic Programming Model Based on Dual-Interval and Multi-Stage Scenarios Modeling Approaches for Energy Systems Management and GHG Emissions Control  

Science Journals Connector (OSTI)

Energy-related activities contribute a major portion of anthropogenic greenhouse gas (GHG) emissions into the atmosphere. In this ... -environment systems management, in which issues of GHG-emission mitigation ca...

G. C. Li; G. H. Huang; Z. F. Liu

2014-10-01T23:59:59.000Z

225

Dual Axis Radiographic Hydrodynamic Test Facility | National...  

National Nuclear Security Administration (NNSA)

Dual Axis Radiographic Hydrodynamic Test Facility | National Nuclear Security Administration People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

226

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application  

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

presentation presentation does not contain any proprietary, confidential, or otherwise restricted information page 1 Overview * Base Period: - 100% complete * Manufacturing costs * Materials costs (particularly precious Timeline Barriers - Feb 17, 2006 to Feb. 16, 2008 * Option year 1 of 3: - 65% complete - Started Feb 16, 2008 metal catalysts) Characteristic Units 2008 2010 2015 Stack Cost $/kW e (net) - $25 $15 - $325K (2 year base period) - $182k (opt. yr. 1) - Contractor share: $0 * Funding for FY 2008 * Extensive interaction with Collaborations System Cost $/kW e (net) - $45 $30 * Funding for FY 2008 - $182k industry/researchers to solicit design & manufacturing metrics as input to cost analysis. page 2 Started Feb 16, 2008 Budget * Total project funding DOE Cost Targets

227

Radiation source rate estimation through data assimilation of gamma dose rate measurements for operational nuclear emergency response systems  

Science Journals Connector (OSTI)

This paper presents an evaluation of an innovative data assimilation method that has been recently developed in NCSR Demokritos for estimating an unknown emission rate of radionuclides in the atmosphere, with real-scale experimental data. The efficient algorithm is based on the assimilation of gamma dose rate measured data in the Lagrangian atmospheric dispersion model DIPCOT and uses variational principles. The DIPCOT model is used in the framework of the nuclear emergency response system (ERS) RODOS. The evaluation is performed by computational simulations of dispersion of Ar-41 that was emitted routinely by the Australian Nuclear Science and Technology Organisation's (ANSTO) previous research reactor, HIFAR, located in Sydney, Australia. In this paper the algorithm is evaluated against a more complicated case than the others used in previous studies: there was only one monitoring station available each day and the site topography is characterised as moderately complex. Overall the estimated release rate approaches the real one to a very satisfactory degree as revealed by the statistical indicators of errors.

Vasiliki Tsiouri; Spyros Andronopoulos; Ivan Kovalets; Leisa L. Dyer; John G. Bartzis

2012-01-01T23:59:59.000Z

228

Free energy calculations using dual-level Born-Oppenheimer molecular dynamics  

SciTech Connect

We describe an efficient and accurate method to compute free energy changes in complex chemical systems that cannot be described through classical molecular dynamics simulations, examples of which are chemical and photochemical reactions in solution, enzymes, interfaces, etc. It is based on the use of dual-level Born-Oppenheimer molecular dynamics simulations. A low-level quantum mechanical method is employed to calculate the potential of mean force through the umbrella sampling technique. Then, a high-level quantum mechanical method is used to estimate a free energy correction on selected points of the reaction coordinate using perturbation theory. The precision of the results is comparable to that of ab initio molecular dynamics methods such as the Car-Parrinello approach but the computational cost is much lower, roughly by two to three orders of magnitude. The method is illustrated by discussing the association free energy of simple organometallic compounds, although the field of application is very broad.

Retegan, Marius; Martins-Costa, Marilia; Ruiz-Lopez, Manuel F. [Theoretical Chemistry and Biochemistry Group, SRSMC, CNRS, Nancy-University, BP 70239, 54506 Vandoeuvre-les-Nancy (France)

2010-08-14T23:59:59.000Z

229

Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2010 Update  

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

Mass Production Cost Estimation for Direct H 2 PEM Fuel Cell Systems for Automotive Applications: 2010 Update September 30, 2010 Prepared by: Brian D. James, Jeffrey A. Kalinoski & Kevin N. Baum One Virginia Square 3601 Wilson Boulevard, Suite 650 Arlington, Virginia 22201 703-243-3383 Prepared under: Subcontract No. AGB-0-40628-01 to the National Renewable Energy Laboratory (NREL) under Prime Contract No. DE-AC36-08GO28308 to the U.S. Department of Energy Foreword Energy security is fundamental to the mission of the U.S. Department of Energy (DOE) and hydrogen fuel cell vehicles have the potential to eliminate the need for oil in the transportation sector. Fuel cell vehicles can operate on hydrogen, which can be produced domestically, emitting less greenhouse gasses and pollutants than

230

Gravity Dual of Superconformal Anomaly  

E-Print Network (OSTI)

The supergravity dual of superconformal anomaly in a four-dimensional supersymmetric gauge theory is investigated. We consider a well-established dual correspondence between the ${\\cal N}=1$ $SU(N+M)\\times SU(N)$ supersymmetric gauge theory with two flavors of matter fields in the bifundamental representation of gauge group and the type IIB superstring in the space-time background furnished by the Klebanov-Strassler (K-S) solution. The D-brane configuration for these two dual theories consists of N D3 branes and M fractional $D3$ branes in the singular space-time composed of a direct product of M^4 and a six-dimensional conifold ${\\cal C}_6$ with the base $T^{1,1}$. The superconformal anomaly originate from fractional branes frozen at the apex of ${\\cal C}_6$. While on the gravity side, the fractional branes deform the $AdS_5\\times T^{1,1}$ space-time background and partially break local supersymmetry of type IIB supergravity. We find that the deformation on $AdS_5\\times T^{1,1}$ leads to the spontaneous breaking local symmetries in gauged AdS_5 supergravity and consequently a super-Higgs mechanism arises. We thus conclude that the super-Higgs mechanism in gauged supergravity is dual to the superconformal anomaly of supersymmetric gauge theory in terms of gauge/gravity correspondence.

W. F. Chen

2005-08-16T23:59:59.000Z

231

Estimated critical conditions for UF{sub 4}-oil systems in fully oil-reflected spherical geometry  

SciTech Connect

Paraffinic oil has been exposed to UF{sub 6} gas in seal exhaust pumps and cascade equipment at the Portsmouth Gaseous Diffusion Plant. The resulting mixture is more nuclearly reactive than mixtures of UO{sub 2}F{sub 2} and H{sub 2}O and is not bounded by the subcritical mass limits presented in several nuclear criticality safety guides. The purpose of this analysis is to determine several critical parameters; specifically, (1) k{sub {infinity}} and the critical mass for several enrichments and moderation levels and (2) the mass limits for these mixtures. The estimated critical masses for the UF{sub 4}-oil systems are smaller than for the UO{sub 2}F{sub 2}-H{sub 2}O systems. The suggested mass limits for the UF{sub 4}-oil systems are 0.240, 0.280, 0.350, 0.430, and 0.670, and 1.170 kg {sup 235}U for enrichments of 100, 50, 20, 10, 5, and 3 wt.% {sup 235}U respectively.

Plaster, M.J.

1997-05-01T23:59:59.000Z

232

Bag model of hadrons, dual QCD thermodynamics and Quark-Gluon Plasma  

E-Print Network (OSTI)

Using the grand canonical ensemble formulation of a multi-particle statistical system, the thermodynamical description of the dual QCD has been presented in terms of the bag model of hadrons and analyzed for the quark-gluon plasma phase of hadronic matter. The dual QCD bag construction has been shown to lead to the radial pressure on the bag surface in terms of the vector glueball masses of the magnetically condensed QCD vacuum. Constructing the grand canonical partition function to deal with the quark-gluon plasma phase of the non-strange hadrons, the energy density and the plasma pressure have been derived and used to understand the dynamics of the associated phase transition. The critical temperature for QGP-hadron phase transition has been derived and numerically estimated by using various thermodynamic considerations. A comparison of the values of the critical temperatures for QGP-hadron phase transition with those obtained for the deconfinement-phase transition, has been shown to lead to the relaxation ...

Chandola, H C; Dehnen, H

2015-01-01T23:59:59.000Z

233

Develop the dual fuel conversion system for high output, medium speed diesel engines. Quarterly report number 4, July--September, 1997  

SciTech Connect

This quarter started out with fresh ability to perform sustained engine operation on gas because of the successful operation of the gas compressor last quarter. The authors have completed baseline tests recording emissions and efficiency numbers. This gives the authors data that they have never before been able to acquire in the facility. In addition to the baseline data they have recorded data with a host of additional engine variables. These variables include the adjustments of ignition timing, air fuel ratio, air inlet temperatures and some propane seeding of the injected gas. With the background data on record they will be able to properly measure the level of positive impact that the port gas injection system provides. The remaining time in this quarter has been focused on completing the application of the port style gas injection system. The next steps in this project all pivot on the application of this port injection system. They have also progressed in the evaluation of the cylinder/engine monitoring system.

NONE

1997-09-23T23:59:59.000Z

234

Study of the utilization and benefits of phasor measurement units for large scale power system state estimation  

E-Print Network (OSTI)

of adding PMU measurements on the state estimation solution accuracy will be studied. Bad data processing in the presence of PMU measurements will also be presented. Finally, a multiarea state estimation method will be developed. This method involves a two...

Yoon, Yeo Jun

2006-04-12T23:59:59.000Z

235

Develop the dual fuel conversion system for high output, medium speed diesel engines. Quarterly report number 3, April 1--June 30, 1997  

SciTech Connect

This quarter the project focused primarily in two basic areas. Approximately 60% of the time was applied at continuing to manufacture and test alternate designs of the diesel prechamber and its associated auxiliary equipment. Approximately 23% time was applied to the hydraulic actuation of the gas injector and the design work of applying the gas injector to the engines cylinder liner. The remaining 17% time was spread over a number of areas two of which include the completion of knock detection system and test facility calibration and service.

NONE

1997-06-30T23:59:59.000Z

236

A dual-porosity reservoir model with a nonlinear coupling term  

SciTech Connect

Since their introduction by Barenblatt et al. (1960), double-porosity models have been widely used for simulating flow in fractured reservoirs, such as geothermal reservoirs. In a dual-porosity system, the matrix blocks provide most of the storage of the reservoir, whereas the fractures provide the global transmissivity. Initially, most work on dual-porosity models emphasized the development of analytical solutions to idealized reservoir problems. Increasingly, the dual-porosity approach is being implemented by numerical reservoir simulators. Accurate numerical simulation of a dual-porosity problem often requires a prohibitively large number of computational cells in order to resolve the transient pressure gradients in the matrix blocks. We discuss a new dual-porosity model that utilizes a nonlinear differential equation to approximate the fracture/matrix interactions, When implemented into a numerical simulator, it eliminates the need to discretize the matrix blocks, and thereby allows more efficient simulation of reservoir problems.

Zimmerman, R.W.; Chen, G.; Hadgu, T.; Bodvarsson, G.S.

1992-09-01T23:59:59.000Z

237

Power control of dual-motor electric drive for tracked vehicles  

Science Journals Connector (OSTI)

The fundamental problem of the power control for the driving of a dual-motor drive electric tracked vehicle is analyzed. The tracked vehicle and its electric drive system are mathematically modeled. Power control...

Yuan Zou; Chengning Zhang; Fengchun Sun…

2010-03-01T23:59:59.000Z

238

Multiplexed fiber-optic sensors using a dual-slope frequency-modulated source  

Science Journals Connector (OSTI)

We propose and demonstrate a multiplexed fiber-optic sensor system using a dual-slope (triangular) frequency-modulated laser source. The restrictions in the selection of beat...

Chien, Pie-Yau; Pan, Ci-Ling

1991-01-01T23:59:59.000Z

239

Primate polonium metabolic models and their use in estimation of systemic radiation doses from bioassay data. Final report  

SciTech Connect

A Polonium metabolic model was derived and incorporated into a Fortran algorithm which estimates the systemic radiation dose from {sup 210}Po when applied to occupational urine bioassay data. The significance of the doses estimated are examined by defining the degree of uncertainty attached to them through comprehensive statistical testing procedures. Many parameters necessary for dosimetry calculations (such as organ partition coefficients and excretion fractions), were evaluated from metabolic studies of {sup 210}Po in non-human primates. Two tamarins and six baboons were injected intravenously with {sup 210}Po citrate. Excreta and blood samples were collected. Five of the baboons were sacrificed at times ranging from 1 day to 3 months post exposure. Complete necropsies were performed and all excreta and the majority of all skeletal and tissue samples were analyzed radiochemically for their {sup 210}Po content. The {sup 210}Po excretion rate in the baboon was more rapid than in the tamarin. The biological half-time of {sup 210}Po excretion in the baboon was approximately 15 days while in the tamarin, the {sup 210}Po excretion rate was in close agreement with the 50 day biological half-time predicted by ICRP 30. Excretion fractions of {sup 210}Po in the non-human primates were found to be markedly different from data reported elsewhere in other species, including man. A thorough review of the Po urinalysis procedure showed that significant recovery losses resulted when metabolized {sup 210}Po was deposited out of raw urine. Polonium-210 was found throughout the soft tissues of the baboon but not with the partition coefficients for liver, kidneys, and spleen that are predicted by the ICRP 30 metabolic model. A fractional distribution of 0.29 for liver, 0.07 for kidneys, and 0.006 for spleen was determined. Retention times for {sup 210}Po in tissues are described by single exponential functions with biological half-times ranging from 15 to 50 days.

Cohen, N. [New York Univ. Medical Center, Tuxedo, NY (United States). Dept. of Environmental Medicine

1989-03-15T23:59:59.000Z

240

Distribution System State Estimation  

Office of Scientific and Technical Information (OSTI)

these include reactive power management, outage management, loss reduction, demand response, adaptable over-current protection, condition-based maintenance, distributed...

Note: This page contains sample records for the topic "dual system estimation" 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

Solar Heating System Estimating  

Science Journals Connector (OSTI)

The Canadian Federal Government has embarked on a S$225,000,000.00 programme to help develop solar energy in Canada. The programme is being handled by the ... of the federal government who will be installing solar

Don Hampton

1983-01-01T23:59:59.000Z

242

654 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 18, NO. 3, MAY 2010 Model-Based Electrochemical Estimation and  

E-Print Network (OSTI)

in the literature. Accurate estimation of the battery's internal electrochemical state enables an expanded range governor, state-of-charge (SOC) estimation. I. INTRODUCTION MODEL-BASED battery monitoring algorithms theories, captures relevant solid-state and electrolyte diffusion dynamics and accurately predicts current

243

Energy performance of a dual airflow window under different climates  

Science Journals Connector (OSTI)

Ventilated windows have shown great potential in conserving energy in buildings and provide fresh air to improve indoor air quality. This paper reports our effort to use EnergyPlus to simulate the energy performance of a dual airflow window under different climates. Our investigation first developed a network model to account for the two-dimensional heat transfer in the window system and implemented it in EnergyPlus. The two-dimensional assumption and the modified EnergyPlus program were validated by the measured temperatures of the window and the energy demand of a test cell with the window under actual weather conditions. Then EnergyPlus was applied to analyze energy performance of a small apartment installed with the dual airflow windows in five different climate zones in China. The energy used by the apartment with blinds windows and low-e windows was also calculated for comparison. The dual airflow window can reduce heating energy of the apartment, especially in cold climate. The cooling energy reduction by the window was less important than that by shading solar radiation. The dual airflow window is recommended for colder climate. If improving air quality is a major consideration for a building, the window can be used in any climate.

Jingshu Wei; Jianing Zhao; Qingyan Chen

2010-01-01T23:59:59.000Z

244

arXiv:1004.0395v2[cs.NI]6Apr2010 Estimating Self-Sustainability in Peer-to-Peer Swarming Systems  

E-Print Network (OSTI)

arXiv:1004.0395v2[cs.NI]6Apr2010 Estimating Self-Sustainability in Peer-to-Peer Swarming Systems propose a new metric, namely swarm self-sustainability. A swarm is referred to as self-sustaining if all its blocks are collectively held by peers; the self-sustainability of a swarm is the fraction of time

Massachusetts at Amherst, University of

245

Dual fuel development for an LNG marine engine  

SciTech Connect

A dual-fuel conversion for the 3406-B Caterpillar marine diesel engine has been developed. The purpose of this conversion is to use lower priced natural gas as a fuel, thus providing substantial cost savings for large fuel consumers. Details of the conversion system are given. Data is presented showing fuel consumption, conditions leading to engine knock, conditions promoting methane flame propagation, and air-fuel ratios required for efficient combustion. The system resulting from this study will use Liquefied Natural Gas (LNG) to power a dual-fuel conversion of a shrimp boat's main engine and generator set. The cold temperatures of the LNG will also be used as a heat sink to refrigerate the fish-hold area of the boat.

Acker, G.H.

1988-01-01T23:59:59.000Z

246

Application of honey-bee mating optimization on state estimation of a power distribution system including distributed generators  

Science Journals Connector (OSTI)

We present a new approach based on honey-bee mating optimization to estimate the state variables in distribution networks including distributed generators. The proposed method considers practical models of...

Taher Niknam

2008-12-01T23:59:59.000Z

247

Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems  

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

DOE Geothermal Peer Review 2010 - Presentation. This objective of this project is to develop an innovative approach to estimate fracture surface area and spacing through interpretation of signals of natural chemical and isotopic tracers.

248

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 2.3: Sulfur Primer  

SciTech Connect

This deliverable is Subtask 2.3 of Task 2, Gas Cleanup Design and Cost Estimates, of NREL Award ACO-5-44027, ''Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup and Oxygen Separation Equipment''. Subtask 2.3 builds upon the sulfur removal information first presented in Subtask 2.1, Gas Cleanup Technologies for Biomass Gasification by adding additional information on the commercial applications, manufacturers, environmental footprint, and technical specifications for sulfur removal technologies. The data was obtained from Nexant's experience, input from GTI and other vendors, past and current facility data, and existing literature.

Nexant Inc.

2006-05-01T23:59:59.000Z

249

Air-Side Energy Use Calculations for Four HVAC Systems: Dual Duct Constant Volume (DDCAV), Dual Duct Variable Volume (DDVAV), Constant Volume with Reheat (CAVRH), Variable Volume with Reheat (VAVRH), Four Pipe Fan Coil Unit (FC), Four Pipe Induction Unit (FI), and Single Zone (SZ) Systems, Revised June 2002  

E-Print Network (OSTI)

(CAVRH), and variable volume with reheat (VAVRH), four pipe fan coil unit (FC), four pipe induction unit (FI), and a single zone air conditioning system (SZ). These calculations are presented in spreadsheets that include a running commentary so...

Haberl, J. S.; Bou-Saada, T. E.; Saman, N. F.

2001-01-01T23:59:59.000Z

250

Subsidiary Conditions and Ghosts in Dual-Resonance Models  

Science Journals Connector (OSTI)

We investigate the possible subsidiary conditions compatible with the equations of motion of dual-resonance models for the unrealistic choice of ?(0)=1. In the language of four-dimensional harmonic oscillators, we find one subsidiary condition for each mode of oscillation. All time components (in the c.m. system) can therefore be eliminated. We discuss the possibility of relaxing the condition ?(0)=1.

M. A. Virasoro

1970-05-15T23:59:59.000Z

251

Cost Estimator  

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

A successful candidate in this position will serve as a senior cost and schedule estimator who is responsible for preparing life-cycle cost and schedule estimates and analyses associated with the...

252

Power estimation and reliability evaluation of municipal waste water and self-excited induction generator-based micro hydropower generation system  

Science Journals Connector (OSTI)

This paper presents power estimation and reliability evaluation of the micro hydro power generation system based on municipal waste water. Self-excited induction generator was used in the developed power plant, situated at IIT (BHU) campus, Varanasi, India. The hydro potential of the waste water flowing through sewage system of the Banaras Hindu University has been determined for annual flow duration and daily flow duration curves by ordering the recorded waste water from maximum to minimum flows. This paper estimates output power and determines reliability indices like: failure rate, repair rate, MTTF, MTTR and MTBF of the MWW-based developed generation plant. Design parameters of the SEIG with suitable values of the capacitor have been used and recommended for improvement of the power generation quality and reliability of the system.

Lokesh Varshney; R.K. Saket; Saeid Eslamian

2013-01-01T23:59:59.000Z

253

Friction Coefficient for Quarks in Supergravity Duals  

E-Print Network (OSTI)

We study quarks moving in strongly-coupled plasmas that have supergravity duals. We compute the friction coefficient of strings dual to such quarks for general static supergravity backgrounds near the horizon. Our results also show that a previous conjecture on the bound has to be modified and higher friction coefficients can be achieved.

E. Antonyan

2006-11-22T23:59:59.000Z

254

Dual spatial maps of transcript and protein abundance in the...  

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

Dual spatial maps of transcript and protein abundance in the mouse brain. Dual spatial maps of transcript and protein abundance in the mouse brain. Abstract: Integrating...

255

Sensitive Immunosensor for Cancer Biomarker Based on Dual Signal...  

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

Immunosensor for Cancer Biomarker Based on Dual Signal Amplification Strategy of Graphene Sheets and Multi-Enzyme Sensitive Immunosensor for Cancer Biomarker Based on Dual Signal...

256

POLICY GUIDANCE MEMORANDUM #11 Approval Process for Dual Compensation...  

Office of Environmental Management (EM)

11 Approval Process for Dual Compensation Waivers for Reemployed Annuitants Process to grant dual compensation (salary-offset) waivers to reemployed annuitants who work on a...

257

Characterization of Dual-Fuel Reactivity Controlled Compression...  

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

Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) Using Hydrated Ethanol and Diesel Fuel Characterization of Dual-Fuel Reactivity Controlled Compression Ignition (RCCI)...

258

The Surface Energy Balance System (SEBS) for estimation of turbulent heat fluxes Hydrology and Earth System Sciences, 6(1), 8599 (2002) EGS  

E-Print Network (OSTI)

, turbulent heat flux, evaporation, remote sensing Introduction The estimation of atmospheric turbulent fluxes because of the heterogeneity of land surfaces and the dynamic nature of heat transfer processes. Remote be represented by point measurements only. Methods using remote sensing information to estimate heat exchange

Paris-Sud XI, Université de

259

Global Evaluation of the ISBA-TRIP Continental Hydrological System. Part I: Comparison to GRACE Terrestrial Water Storage Estimates  

E-Print Network (OSTI)

In earth system models, the partitioning of precipitation among the variations of continental water storage climate system sim- ulated by earth system models (ESMs). The continental freshwater reservoirs represent

Ribes, Aurélien

260

Photo of the Week: The First Energy-Efficient Dual-Paned Windows |  

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

The First Energy-Efficient Dual-Paned Windows The First Energy-Efficient Dual-Paned Windows Photo of the Week: The First Energy-Efficient Dual-Paned Windows December 5, 2013 - 12:53pm Addthis Researchers at Berkeley Lab helped develop the first energy-efficient dual-paned windows, now used in buildings and homes worldwide for billions of dollars in energy savings. Current windows research in the Environmental Energy Technologies Division at Berkeley Lab is aimed at developing new glazing materials, windows simulation software and other advanced high-performance window systems. The building shown here, located at Berkeley Lab, is a windows testing facility. | Photo courtesy of Roy Kaltschmidt, Lawrence Berkeley National Laboratory. Researchers at Berkeley Lab helped develop the first energy-efficient

Note: This page contains sample records for the topic "dual system estimation" 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

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes.

Adkins, Douglas R. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM)

1994-01-01T23:59:59.000Z

262

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section is described for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes. 1 figure.

Adkins, D.R.; Rawlinson, K.S.

1994-01-04T23:59:59.000Z

263

A dual mass flux framework for boundary layer convection  

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

A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the

264

T ti E St S tTetiaroa Energy Storage System Estimated ZBB Zinc Bromide Battery Performance and Costs  

E-Print Network (OSTI)

://rael.berkeley.edu 6Modeled 455kW gen set output power #12;Alte nati e Diesel Si ingAlternative Diesel Sizing://rael.berkeley.edu 1 #12;Island Load and DieselIsland Load and Diesel Generation Assumptions #12;Estimated Elect ical: Average daily energy use: 5,698 kWh d d 23 k Average power demand: 237 kW Peak power demand: 427 kW Load

Kammen, Daniel M.

265

Estimating Exposure to Polycyclic Aromatic Hydrocarbons: A Comparison of Survey, Biological Monitoring, and Geographic Information System–Based Methods  

Science Journals Connector (OSTI)

...geographic information system|polycyclic aromatic...evaluating exposure to vehicle exhaust for epidemiologic...geographic information system (GIS). It is not...personal exposures to vehicle exhaust or how they...Performance and Monitoring System of the U.S. Department...average number of vehicles per day traveling...

Robert B. Gunier; Peggy Reynolds; Susan E. Hurley; Sauda Yerabati; Andrew Hertz; Paul Strickland; and Pamela L. Horn-Ross

2006-07-01T23:59:59.000Z

266

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

SciTech Connect

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

Smith, T.R.

1997-03-01T23:59:59.000Z

267

Biomass Gasification in Dual Fluidized Bed Gasifier  

Science Journals Connector (OSTI)

The dual fluidized bed gasification technology is prospective because it produces high...2...dilution even when air is used to generate the required endothermic heat via in situ combustion. This study is devoted ...

Toshiyuki Suda; Takahiro Murakami…

2007-01-01T23:59:59.000Z

268

Use of system code to estimate equilibrium tritium inventory in fusion DT machines, such as ARIES-AT and components testing facilities  

SciTech Connect

ITER is under construction and will begin operation in 2020. This is the first 500 MWfusion class DT device, and since it is not going to breed tritium, it will consume most of the limited supply of tritium resources in the world. Yet, in parallel, DT fusion nuclear component testing machines will be needed to provide technical data for the design of DEMO. It becomes necessary to estimate the tritium burn-up fraction and corresponding initial tritium inventory and the doubling time of these machines for the planning of future supply and utilization of tritium. With the use of a system code, tritium burn-up fraction and initial tritium inventory for steady state DT machines can be estimated. Estimated tritium burn-up fractions of FNSF-AT, CFETR-R and ARIES-AT are in the range of 1–2.8%. Corresponding total equilibrium tritium inventories of the plasma flow and tritium processing system, and with the DCLL blanket option are 7.6 kg, 6.1 kg, and 5.2 kg for ARIES-AT, CFETR-R and FNSF-AT, respectively.

C.P.C. Wong; B. Merrill

2014-10-01T23:59:59.000Z

269

A Comparison of Non-stationary, Type-2 and Dual Surface Fuzzy Control  

E-Print Network (OSTI)

,uxa,jmg]@cs.nott.ac.uk Abstract--Type-1 fuzzy logic has frequently been used in control systems. However this method is sometimes and fuzzy logic to automate system controllers. The underpinning technique of fuzzy logic was originallyA Comparison of Non-stationary, Type-2 and Dual Surface Fuzzy Control Naisan Benatar, Uwe Aickelin

Aickelin, Uwe

270

Estimating SCR installation costs  

SciTech Connect

The EUCG surveyed 72 separate US installations of selective catalytic reduction (SCR) systems at coal-fired units totalling 41 GW of capacity to identify the systems' major cost drivers. The results, summarized in this article, provide excellent first-order estimates and guidance for utilities considering installing the downstream emissions-control technology. 4 figs., 1 tab.

Marano, M.; Sharp, G. [American Electric Power (United States)

2006-01-15T23:59:59.000Z

271

Regional-Scale Estimation of Electric Power and Power Plant CO2 Emissions Using Defense Meteorological Satellite Program Operational Linescan System Nighttime Satellite Data  

Science Journals Connector (OSTI)

For estimation, the relationship between Defense Meteorological Satellite Program Operational Linescan System (DMSP/OLS) annual nighttime stable light product (NSL) for 2006 and statistical data on power generation, power consumption, and power plant CO2 emissions in 10 electric power supply regions of Japan was investigated. ... There are similar linear correlations of electricity consumption for lighting and total electricity consumption at the regional (e.g., state and province) level, but possibly not for CO2 emissions because of regional concentrations of electricity from renewable energy and nuclear power plants, which produce low CO2 emissions. ...

Husi Letu; Takashi Y. Nakajima; Fumihiko Nishio

2014-04-24T23:59:59.000Z

272

A neural network based approach to estimate of power system harmonics for an induction furnace under the different load conditions  

Science Journals Connector (OSTI)

This study presents an artificial neural network based intelligent monitoring algorithm to detect of a power system harmonics. The proposed approach was tested on the current and voltage data of an induction furn...

Hayrettin Gokozan; Sezai Taskin; Serhat Seker; Huseyin Ekiz

2014-11-01T23:59:59.000Z

273

On the estimation of the unknown reactivity coefficients in a CANDU reactor  

Science Journals Connector (OSTI)

A space-time kinetics based inverse architecture method is suggested to analyze the reactivity variations associated with power excursions in a generic CANDU reactor. It is intended to provide diagnosis tools to gain enhanced control thereby ensuring safe operation of the plant. A methodology for analyzing the data available from the in core flux detectors and extracting the unknown reactivity coefficients is presented. The proposed system uses a reference model in conjunction with an optimal estimator. The reference model is composed of a state space representation of the space-time dynamics of neutron flux in the core, based on modal expansion approximation, and a time domain optimal estimator filter. We investigated three different estimation techniques based on recursive prediction error method (RPEM), dual extended Kalman filter (DEKF), and joint extended Kalman filter (JEKF). We compared their applicability to the estimation of coolant-void dynamic reactivity in loss-of-coolant accident in a CANDU reactor. The state equations also include the characteristics of the detector responses. The thermal hydraulic models were not included in the calculations. Two different types of detectors are considered in this analysis, the over prompt responsive Platinum detector of the reactor shutdown systems, and the under delayed responsive Vanadium detector of the flux mapping system.

Lobat Tayebi; Daryoosh Vashaee

2013-01-01T23:59:59.000Z

274

Stimulated dual-band infrared computed tomography: A tool to inspect the aging infrastructure  

SciTech Connect

The authors have developed stimulated dual-band infrared (IR) computed tomography as a tool to inspect the aging infrastructure. The system has the potential to locate and quantify structural damage within airframes and bridge decks. Typically, dual-band IR detection methods improve the signal-to-noise ratio by a factor of ten, compared to single-band IR detection methods. They conducted a demonstration at Boeing using a uniform pulsed-heat source to stimulate IR images of hidden defects in the 727 fuselage. The dual-band IR camera and image processing system produced temperature, thermal inertia, and cooling-rate maps. In combination, these maps characterized the defect site, size, depth, thickness and type. The authors quantified the percent metal loss from corrosion above a threshold of 5%, with overall uncertainties of 3%. Also, they conducted a feasibility study of dual-band IR thermal imaging for bridge deck inspections. They determined the sites and relative concrete displacement of 2-in. and 4-in. deep delaminations from thin styrofoam implants in asphalt-covered concrete slabs. They demonstrated the value of dual-band IR computed tomography to quantify structural damage within flash-heated airframes and naturally-heated bridge decks.

Del Grande, N.K.; Durbin, P.F.

1995-06-27T23:59:59.000Z

275

Power spectrum estimates of high frequency noise generated by high impedance arcing faults on distribution systems / by Thomas James Talley  

E-Print Network (OSTI)

. 1 See Ap- pendix A. 2 Recor- DC-80kHz +20v . 57vpk 10vpk 1 47db der See Ap- pendix A. 3 Other measurement considerations involved the frequency response of the relaying Current Transformer (CT's) at power system substations which were... . 1 See Ap- pendix A. 2 Recor- DC-80kHz +20v . 57vpk 10vpk 1 47db der See Ap- pendix A. 3 Other measurement considerations involved the frequency response of the relaying Current Transformer (CT's) at power system substations which were...

Talley, Thomas James

2012-06-07T23:59:59.000Z

276

Trapped diurnal internal tides, propagating semidiurnal internal tides, and mixing estimates in the California Current System from sustained glider observations, 2006–2012  

Science Journals Connector (OSTI)

Abstract From 2006–2012, along 3 repeated cross-shore transects (California Cooperative Oceanic Fisheries Investigations lines 66.7, 80, and 90) in the California Current System, 33 609 shear and 39 737 strain profiles from 66 glider missions are used to estimate mixing via finescale parameterizations from a dataset containing over 52 000 profiles. Elevated diffusivity estimates and energetic diurnal (D1) and semidiurnal (D2) internal tides are found: (a) within 100 km of the coast on lines 66.7 and 80 and (b) over the Santa Rosa-Cortes Ridge (SRCR) in the Southern California Bight (SCB) on line 90. While finding elevated mixing near topography and associated with internal tides is not novel, the combination of resolution and extent in this ongoing data collection is unmatched in the coastal ocean to our knowledge. Both D1 and D2 internal tides are energy sources for mixing. At these latitudes, the D1 internal tide is subinertial. On line 90, D1 and D2 tides are equally energetic over the SRCR, the main site of elevated mixing within the SCB. Numerous sources of internal tides at the rough topography in the SCB produce standing and/or partially-standing waves. On lines 66.7 and 80, the dominant energy source below about 100 m for mixing is the D1 internal tide, which has an energy density of the D2 internal tide. On line 80, estimated diffusivity, estimated dissipation, and D1 energy density peak in summer. The D1 energy density shows an increasing trend from 2006 to 2012. Its amplitude and phase are mostly consistent with topographically-trapped D1 internal tides traveling with the topography on their right. The observed offshore decay of the diffusivity estimates is consistent with the exponential decay of a trapped wave with a mode-1 Rossby radius of 20–30 km. Despite the variable mesoscale, it is remarkable that coherent internal tidal phase is found.

T.M. Shaun Johnston; Daniel L. Rudnick

2014-01-01T23:59:59.000Z

277

State Emissions Estimates  

Gasoline and Diesel Fuel Update (EIA)

Estimates of state energy-related carbon dioxide emissions Estimates of state energy-related carbon dioxide emissions Because energy-related carbon dioxide (CO 2 ) constitutes over 80 percent of total emissions, the state energy-related CO 2 emission levels provide a good indicator of the relative contribution of individual states to total greenhouse gas emissions. The U.S. Energy Information Administration (EIA) emissions estimates at the state level for energy-related CO 2 are based on data contained in the State Energy Data System (SEDS). 1 The state-level emissions estimates are based on energy consumption data for the following fuel categories: three categories of coal (residential/commercial, industrial, and electric power sector); natural gas; and ten petroleum products including-- asphalt and road oil, aviation gasoline, distillate fuel, jet fuel, kerosene, liquefied petroleum gases

278

Common Mathematical Foundations of Expected Utility and Dual ...  

E-Print Network (OSTI)

distributions, and their convex combinations correspond to lotteries. The dual utility theory uses convex combinations of comonotonic real random variables, ...

2012-11-24T23:59:59.000Z

279

Estimating exergy prices for energy carriers in heating systems: Country analyses of exergy substitution with capital expenditures  

Science Journals Connector (OSTI)

Exergy represents the ability of an energy carrier to perform work and can be seen as a core indicator for measuring its quality. In this article we postulate that energy prices reflect the exergy content of the underlying energy carrier and that capital expenditures can substitute for exergy to some degree. We draw our line of argumentation from cost and technology data for heating systems of four European countries: Austria, Finland, The Netherlands, and Sweden. Firstly, this paper shows that the overall consumer costs for different heating options, widely installed in those countries, are in the same range. In this analysis we derived an overall standard deviation of about 8%. Secondly, additional analysis demonstrates that the share of capital costs on total heating cost increases with lower exergy input. Based on the data used in this analysis, we conclude that for the case of modern cost effective heating systems the substitution rate between exergy and capital is in the vicinity of 2/3. This means that by reducing the average specific exergy input of the applied energy carriers by one unit, the share of capital costs on the total costs increases by 2/3 of a unit.

A. Müller; L. Kranzl; P. Tuominen; E. Boelman; M. Molinari; A.G. Entrop

2011-01-01T23:59:59.000Z

280

Estimating potential photovoltaic yield with r.sun and the open source Geographical Resources Analysis Support System  

SciTech Connect

The package r.sun within the open source Geographical Resources Analysis Support System (GRASS) can be used to compute insolation including temporal and spatial variation of albedo and solar photovoltaic yield. A complete algorithm is presented covering the steps of data acquisition and preprocessing to post-simulation whereby candidate lands for incoming solar farms projects are identified. The optimal resolution to acquire reliable solar energy outputs to be integrated into PV system design software was determined to be 1 square km. A case study using the algorithm developed here was performed on a North American region encompassing fourteen counties in South-eastern Ontario. It was confirmed for the case study that Ontario has a large potential for solar electricity. This region is found to possess over 935,000 acres appropriate for solar farm development, which could provide 90 GW of PV. This is nearly 60% of Ontario's projected peak electricity demand in 2025. The algorithm developed and tested in this paper can be generalized to any region in the world in order to foster the most environmentally-responsible development of large-scale solar farms. (author)

Nguyen, H.T.; Pearce, J.M. [Department of Mechanical and Materials Engineering, Queen's University, 60 Union Street, Kingston, Ontario (Canada)

2010-05-15T23:59:59.000Z

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281

Dual cure low-VOC coating process. Final technical report, Phase 3  

SciTech Connect

US EPA is implementing increasingly stringent environmental regulations on the emissions of volatile organic compounds (VOCs), which amount to about 7 {times} 10{sup 9} lb/year, largely from paints and other coating systems in industry. Objective of this project is to develop Dual Cure Photocatalyst coating technology for aerospace topcoats (urethane/acrylate), aerospace primers (epoxy/acrylate), and solventless tape backings. Some problems (moisture etc.) were encountered in the primer area. Cost, economic, and energy analyses were conducted. The dual cure technology has already been commercialized in 3M`s flexible diamond resin products. Tabs.

Kinzer, K.E.

1993-12-01T23:59:59.000Z

282

LM158/LM258/LM358/LM2904 Low Power Dual Operational Amplifiers  

E-Print Network (OSTI)

LM158/LM258/LM358/LM2904 Low Power Dual Operational Amplifiers General Description The LM158 series systems. For example, the LM158 series can be directly operated off of the standard +5V power supply without requiring the additional ±15V power supplies. The LM358 and LM2904 are available in a chip sized

Lanterman, Aaron

283

Peak Demand Reduction with Dual-Source Heat Pumps Using Municipal Water  

E-Print Network (OSTI)

The objective of this project was to examine a dual-source (air and/or water-coupled) heat pump concept which would reduce or eliminate the need for supplemental electrical resistance heating (strip heaters). The project examined two system options...

Morehouse, J. H.; Khan, J. A.; Connor, L. N.; Pal, D.

284

Gemstone Detector: Dual Energy Imaging via Fast kVp Switching  

Science Journals Connector (OSTI)

This chapter provides an overview of the GE Discovery CT750HD dual energy imaging capability known as gemstone spectral imaging (GSI). The CT750HD is a single X-ray source system that employs fast kVp switching f...

Naveen Chandra; David A. Langan

2011-01-01T23:59:59.000Z

285

Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm  

E-Print Network (OSTI)

Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm Yuan a careful isolation of the instrument from the vibration sources by adopting active vibration isolation system to achieve a very low remaining vibration level especially for the very low frequency under 10Hz

Li, Yangmin

286

Cost Estimating, Analysis, and Standardization  

Directives, Delegations, and Requirements

To establish policy and responsibilities for: (a) developing and reviewing project cost estimates; (b) preparing independent cost estimates and analysis; (c) standardizing cost estimating procedures; and (d) improving overall cost estimating and analytical techniques, cost data bases, cost and economic escalation models, and cost estimating systems. Cancels DOE O 5700.2B, dated 8-5-1983; DOE O 5700.8, dated 5-27-1981; and HQ 1130.1A, dated 12-30-1981. Canceled by DOE O 5700.2D, dated 6-12-1992

1984-11-02T23:59:59.000Z

287

Dual-fuel natural gas/diesel engines: Technology, performance, and emissions. Topical report, February 1993-November 1994  

SciTech Connect

An investigation of current dual-fuel natural gas/diesel engine design, performance, and emissions was conducted. The most pressing technological problems associated with dual-fuel engine use were identified along with potential solutions. It was concluded that dual-fuel engines can achieve low NOx and particulate emissions while retaining fuel-efficiency and BMEP levels comparable to those of diesel engines. The investigation also examined the potential economic impact of dual-fuel engines in diesel-electric locomotives, marine vessels, farm equipment, construction, mining, and industrial equipment, and stand-alone electricity generation systems. Recommendations for further additional funding to support research, development, and demonstration in these applications were then presented.

Turner, S.H.; Weaver, C.S.

1994-11-01T23:59:59.000Z

288

Dual Axis Radiographic Hydrodynamic Test Facility  

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

DARHT Facility: A critical component of stockpile stewardship DARHT Facility: A critical component of stockpile stewardship A new research frontier awaits! Our door is open and we thrive on mutually beneficial partnerships, collaborations that drive innovations and new technologies. April 12, 2012 Dominic Tafoya and Dave Honaberger prepare a refurbished DARHT (Dual Axis Radiographic Hydrotest Facility) 2nd axis accelerator cell for magnetic axis alignment measurements. Contact Group Leader Terry Priestley (505) 665-1330 Email Deputy Group Leader Tim Ferris (505) 665-2179 Email Hydrotests are critical in assessing nuclear weapons in nation's stockpile Dual Axis Radiographic Hydrodynamic Test facility 4:17 How DARHT Works The weapons programs at Los Alamos have one principal mission: ensure the safety, security, and effectiveness of nuclear weapons in our nation's

289

Adaptive upscaling with the dual mesh method  

SciTech Connect

The objective of this paper is to demonstrate that upscaling should be calculated during the flow simulation instead of trying to enhance the a priori upscaling methods. Hence, counter-examples are given to motivate our approach, the so-called Dual Mesh Method. The main steps of this numerical algorithm are recalled. Applications illustrate the necessity to consider different average relative permeability values depending on the direction in space. Moreover, these values could be different for the same average saturation. This proves that an a priori upscaling cannot be the answer even in homogeneous cases because of the {open_quotes}dynamical heterogeneity{close_quotes} created by the saturation profile. Other examples show the efficiency of the Dual Mesh Method applied to heterogeneous medium and to an actual field case in South America.

Guerillot, D.; Verdiere, S.

1997-08-01T23:59:59.000Z

290

Fabrication of dual porosity electrode structure  

DOE Patents (OSTI)

A substantially entirely fibrous ceramic which may have dual porosity of both micro and macro pores. Total porosity may be 60-75% by volume. A method of spraying a slurry perpendicularly to an ambient stream of air is disclosed along with a method of removing binders without altering the fiber morphology. Adding fine ceramic particulates to the green ceramic fibers enhances the sintering characteristics of the fibers.

Smith, James L. (Lemont, IL); Kucera, Eugenia H. (Downers Grove, IL)

1991-01-01T23:59:59.000Z

291

Fabrication of dual porosity electrode structure  

DOE Patents (OSTI)

A substantially entirely fibrous ceramic is described which may have dual porosity of both micro and macro pores. Total porosity may be 60-75% by volume. A method of spraying a slurry perpendicularly to an ambient stream of air is disclosed along with a method of removing binders without altering the fiber morphology. Adding fine ceramic particulates to the green ceramic fibers enhances the sintering characteristics of the fibers. 3 figures.

Smith, J.L.; Kucera, E.H.

1991-02-12T23:59:59.000Z

292

Measurable energy savings of installing variable frequency drives for cooling towers’ fans, compared to dual speed motors  

Science Journals Connector (OSTI)

Abstract In recent years the building management system (BMS) controllers have been used to control the operation of heating, ventilation, and air conditioning system in addition to lighting and some electrical equipment in order to save energy. In the water cooled system, the BMS controls the operation process of the cooling towers (CTs) fans of dual speed motors to maintain a constant leaving water temperature for different cooling loads and different ambient wet bulb temperature (WBT). This paper presents the effect of installing variable frequency drives (VFDs) for \\{CTs\\} fans in Kuwait during summer season on energy savings compared to dual speed control. The results have shown that with VFD mode, the reduction in water consumption was over 13% compared to the commonly used dual speed mode. More importantly, the combined power for the chillers and the \\{CTs\\} fans for the same amount of cooling produced were reduced by 5.8% in the VFD mode.

E. Al-Bassam; R. Alasseri

2013-01-01T23:59:59.000Z

293

Challenges in estimating waste confinement costs  

SciTech Connect

This paper presents a systems analysis framework for cost estimating and outlines the challenges likely to be confronted during the cost estimating and data base development process. 1 ref., 8 figs.

Rivera, A.L.

1990-01-01T23:59:59.000Z

294

Conceptual Approach For Estimating Potential Air Toxics And Radionuclide Airborne Emissions From A Temporary Exhaust System For The 216-Z-9 Crib Removal Action  

SciTech Connect

The 216-Z-9 Crib, located at the Hanford Nuclear Reservation in southeastern Washington State, was the site of a successful mining effort to recover plutonium from the contaminated soils at the disposal site. A CERCLA Action Memorandum (AM) issued by the U.S. Department of Energy (DOE) requires the removal of the buildings associated with this mining effort to facilitate a remedial action planned for the near future. The decontamination and demolition of the 216 Z-9 Crib facilities is required under a consent order between the DOE, the U.S Environmental Protection Agency (EPA) and the Washington State Department of Ecology (Ecology). Removal of the buildings located on and near the concrete cover slab over the 216-Z-9 Crib will require removal of the large soil-packaging glovebox located inside the 216-Z- 9A Building. Prior to cleaning out the glovebox, it will be necessary to provide active filtered ventilation capability to ensure a negative pressure exists between the glovebox and the adjacent airspace while hands-on work proceeds within. The glovebox floor is open to the Z-9 crib cavern environment below. For this reason the crib and glovebox currently share a common airspace. The functional requirements for safely conducting work within the glovebox include provision of a negative pressure in the box of about 0.5 inches of water gage (nominal) less than the interior of the building. In addition, the building surrounding the glovebox will be maintained at a slight negative pressure with respect to outdoor ambient pressure. In order to assess the relevant and appropriate clean air requirements for the new temporary ventilation system and associated emissions monitoring, it was necessary to reliably predict the nature of the exhaust air stream. Factors used to predict the presence and concentrations of certain radionuclide particulates and certain gases considered to be air toxics, included reliability parameters, flow rates, radionuclide content, and off-gas compositions. Radionuclide content includes transuranic isotopes, primarily of plutonium and americium. Air toxics include carbon tetrachloride, butane, methanol, acetone and toluene. Flow rate prediction was based on available design and test data and considered equipment sizes, glovebox negative pressure requirements, and filter flow characteristics. The approach used to predict the off-gas composition from the crib required experience-based predictive analysis combined with crib head space analytical results. Input information for emission estimates included: (1) gas composition sample data obtained from recent samples taken within the crib head space during static conditions, and (2) air in-leakage/dilution estimates based on physical characteristics of both the crib and the new temporary ventilation system. The conceptual approach combined measurement-based data with conservative assumptions, and provides the estimates necessary to determine relevance and appropriateness of substantive requirements under federal and state laws and regulations. (authors)

Hopkins, A.; Sutter, C.; O'Brien, P.; Bates, J.; Klos, B. [Fluor Hanford Inc., Richland, WA (United States); Teal, J. [Fluor Federal Services, Richland, WA (United States); Oates, L. [Environmental Quality Management, Inc., Richland, WA (United States)

2008-07-01T23:59:59.000Z

295

Iterative Self-Dual Reconstruction on Radar Image Recovery  

SciTech Connect

Imaging systems as ultrasound, sonar, laser and synthetic aperture radar (SAR) are subjected to speckle noise during image acquisition. Before analyzing these images, it is often necessary to remove the speckle noise using filters. We combine properties of two mathematical morphology filters with speckle statistics to propose a signal-dependent noise filter to multiplicative noise. We describe a multiscale scheme that preserves sharp edges while it smooths homogeneous areas, by combining local statistics with two mathematical morphology filters: the alternating sequential and the self-dual reconstruction algorithms. The experimental results show that the proposed approach is less sensitive to varying window sizes when applied to simulated and real SAR images in comparison with standard filters.

Martins, Charles; Medeiros, Fatima; Ushizima, Daniela; Bezerra, Francisco; Marques, Regis; Mascarenhas, Nelson

2010-05-21T23:59:59.000Z

296

Markov Entropy Decomposition: A Variational Dual for Quantum Belief Propagation  

Science Journals Connector (OSTI)

We present a lower bound for the free energy of a quantum many-body system at finite temperature. This lower bound is expressed as a convex optimization problem with linear constraints, and is derived using strong subadditivity of von Neumann entropy and a relaxation of the consistency condition of local density operators. The dual to this minimization problem leads to a set of quantum belief propagation equations, thus providing a firm theoretical foundation to that approach. The minimization problem is numerically tractable, and we find good agreement with quantum Monte Carlo calculations for spin-12 Heisenberg antiferromagnet in two dimensions. This lower bound complements other variational upper bounds. We discuss applications to Hamiltonian complexity theory and give a generalization of the structure theorem of [P. Hayden et al., Commun. Math. Phys. 246, 359 (2004).] to trees in an appendix.

David Poulin and Matthew B. Hastings

2011-02-24T23:59:59.000Z

297

Design of a dual species atom interferometer for space  

E-Print Network (OSTI)

Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of a space compatible design optimized with respect to dimensions, weight, power consumption, mechanical robustness and radiation hardness. In this paper, we present a design of a high-sensitivity differential dual species $^{85}$Rb/$^{87}$Rb atom interferometer for space, including physics package, laser system, electronics and software. The physics package comprises the atom source consisting of dispensers and a 2D magneto-optical trap (MOT), the science chamber with a 3D-MOT, a magnetic trap based on an atom chip and an optical dipole trap (ODT) used for Bose-Einstein condensate (BEC) creation and interferometry...

Schuldt, Thilo; Krutzik, Markus; Bote, Lluis Gesa; Gaaloul, Naceur; Hartwig, Jonas; Ahlers, Holger; Herr, Waldemar; Posso-Trujillo, Katerine; Rudolph, Jan; Seidel, Stephan; Wendrich, Thijs; Ertmer, Wolfgang; Herrmann, Sven; Kubelka-Lange, André; Milke, Alexander; Rievers, Benny; Rocco, Emanuele; Hinton, Andrew; Bongs, Kai; Oswald, Markus; Franz, Matthias; Hauth, Matthias; Peters, Achim; Bawamia, Ahmad; Wicht, Andreas; Battelier, Baptiste; Bertoldi, Andrea; Bouyer, Philippe; Landragin, Arnaud; Massonnet, Didier; Lévèque, Thomas; Wenzlawski, Andre; Hellmig, Ortwin; Windpassinger, Patrick; Sengstock, Klaus; von Klitzing, Wolf; Chaloner, Chris; Summers, David; Ireland, Philip; Mateos, Ignacio; Sopuerta, Carlos F; Sorrentino, Fiodor; Tino, Guglielmo M; Williams, Michael; Trenkel, Christian; Gerardi, Domenico; Chwalla, Michael; Burkhardt, Johannes; Johann, Ulrich; Heske, Astrid; Wille, Eric; Gehler, Martin; Cacciapuoti, Luigi; Gürlebeck, Norman; Braxmaier, Claus; Rasel, Ernst

2014-01-01T23:59:59.000Z

298

Dual fueling of a Caterpillar 3406 diesel engine  

SciTech Connect

A Caterpillar 3406 turbocharged diesel engine was converted to operate in a dual-fuel mode and was evaluated for performance and emission characteristics for both diesel and natural gas operation. Full load power was achieved with dual fueling without knock. Similar fuel efficiencies were obtained with dual fueling a high loads, but efficiencies were lower for low loads. Bosch smoke numbers were reduced by over 50% with dual fueling for all cases investigated. NO{sub x} emissions were found to be lower at low loads and at high speeds under high load. CO emissions were significantly increased for dual fueling while CO{sub 2} concentrations in the exhaust were reduced for dual fueling.

Bell, S.R.; Midkiff, K.C.; Doughty, G.; Brett, C.E. [Univ. of Alabama, Tuscaloosa, AL (United States)

1996-05-01T23:59:59.000Z

299

Clinical Delivery System for Intraperitoneal Hyperthermic Chemotherapy  

Science Journals Connector (OSTI)

...through a sequential dual-filter system and a subsequent warming coil...The sequential dual-filter system is composed of a 4O-@smPall...and outlet tubing for aseptic operation. The filter system has a combined surface area of...

John S. Spratt; Robert A. Adcock; Marie Muskovin; William Sherrill; and John McKeown

1980-02-01T23:59:59.000Z

300

Dual Models with Global SU(2,2) Symmetry  

Science Journals Connector (OSTI)

The possibility of enlarging the gauge symmetry of the dual resonance models is considered by studying the structure of SU(2,2)- [or SO(4,2)] invariant dual models. n-point functions based on the degenerate representations of SU(2,2) are worked out in detail, and a condition under which these amplitudes are dual is specified. Dual models based on the nondegenerate representations are also discussed. Through a physical interpretation of the characteristics which emerge, a possible connection between the dimension N-1 of the hadronic matter and the gauge-symmetry group SO(N, 2) is pointed out.

Freydoon Mansouri

1973-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Management entrenchment and the valuation discount of dual class firms  

Science Journals Connector (OSTI)

Abstract Prior studies provide empirical evidence that dual class firms are discounted compared to single class firms due to the extraction of private benefits. This study examines the link between managerial entrenchment and the dual class discount. Using propensity score matching and conditioning for past underperformance, the paper shows that investors apply a greater discount to the value of dual class firms as the degree of managerial entrenchment increases. The impact of entrenchment on dual class discount is more pronounced when the CEO is the controlling shareholder compared to when the controlling shareholder is a director or the chairman of the board.

Vishaal Baulkaran

2014-01-01T23:59:59.000Z

302

An EP theorem for dual linear complementarity problem  

E-Print Network (OSTI)

Mar 2, 2007 ... An EP theorem for dual linear complementarity problem. Illés Tibor (illes ***at*** math.elte.hu) Marianna Nagy (nmariann ***at*** cs.elte.hu)

Illés Tibor

2007-03-02T23:59:59.000Z

303

An EP theorem for dual linear complementarity problems  

E-Print Network (OSTI)

present an existentially polytime (EP) theorem for the dual LCP with arbitrary ... goals are discussed in Section 2, along with the LCP duality theorem and an EP.

2008-01-20T23:59:59.000Z

304

Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy...  

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

Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Acciona logo Acciona Solar, under the Thermal Storage FOA, plans to develop a prototype thermal energy storage...

305

Geothermal: Sponsored by OSTI -- Final Report: Geothermal Dual...  

Office of Scientific and Technical Information (OSTI)

Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search...

306

Improving the Performance of Stochastic Dual Dynamic Programming  

E-Print Network (OSTI)

Jul 13, 2012 ... 3 describes the three different tree-traversal strategies we shall test and ...... ria for stochastic dual dynamic programming: a case study in ...

2012-07-13T23:59:59.000Z

307

Mass Production Cost Estimation of Direct Hydrogen PEM Fuel Cell...  

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

Mass Production Cost Estimation of Direct Hydrogen PEM Fuel Cell Systems for Transportation Applications: 2012 Update Mass Production Cost Estimation of Direct Hydrogen PEM Fuel...

308

Development of ammonia-sodium bromide heat pump/dual temperature storage concept. Final report  

SciTech Connect

An effective dual temperature heat pump/storage system can be based on the use of ammoniated complex compounds as the storage medium and heat pump working fluid. This report describes the development of an ammoniated complex system, suitable for dual temperature storage, chill storage and heat pumping, as well as the hardware design required for the heat pump/storage operation. Several storage media modifications, heat exchanger designs, and reaction related parameters were investigated in terms of effective heat pumping, dual temperature storage and chill storage characteristics. The modifications were tested in a subscale prototype and compared to the results of the basic experiments performed in Phase I of this project. The computer model developed in Phase I was refined. The sorption reactions and their thermodynamic properties are described as a function of reaction progress allowing coefficient of performance (COP) predictions at varying building loads. A comparison of this system with state-of-the-art thermal storage systems was performed considering the energy density, operating cost, and the environmental impact reflected in building codes.

Rockenfeller, U.

1986-10-01T23:59:59.000Z

309

Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing  

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

Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing Technology in Air Duct Systems Speaker(s): Alan Ropers Date: July 8, 2002 - 12:00pm Location: Bldg. 90 An Aerosol-sealing Technology was developed by LBNL to seal leaks in Air Duct Systems (ADS). The firm AEROSEAL already commercializes this technology for residential ADS. The current goal of our research at the Laboratory is to apply this technology to large commercial ADS. That means to develop a new kind of injector called "Compact Injector". So far, the injector that is used is a nozzle from the Schlick-Dusen firm. Results in terms of sealing rate are satisfactory, but this nozzle quickly clogs up with sealant particles. There are two reasons for the clogging problem: the

310

Black hole spectra in holography: consequences for equilibration of dual gauge theories  

E-Print Network (OSTI)

Energy gap in the spectrum of equilibrium states of interacting system, along with ability to continuously excite the system inside this gap, leads to violation of the ergodicity hypothesis. We explore this in the framework of gauge theory/string theory correspondence. We study the spectrum of static black holes in Pilch-Warner geometry. These black holes are holographically dual to equilibrium states of strongly coupled $SU(N)$ ${\\cal N}=2^*$ gauge theory plasma on $S^3$ in the planar limit. We find that there is no energy gap in the black hole spectrum. Thus, there is a priory no obstruction for equilibration of arbitrary low-energy states in the theory via a small black hole gravitational collapse. The latter is contrasted with phenomenological examples of holography with dual four-dimensional CFTs having non-equal central charges in the stress-energy tensor trace anomaly.

Buchel, Alex

2015-01-01T23:59:59.000Z

311

Parameter Estimation Through Ignorance  

E-Print Network (OSTI)

Dynamical modelling lies at the heart of our understanding of physical systems. Its role in science is deeper than mere operational forecasting, in that it allows us to evaluate the adequacy of the mathematical structure of our models. Despite the importance of model parameters, there is no general method of parameter estimation outside linear systems. A new relatively simple method of parameter estimation for nonlinear systems is presented, based on variations in the accuracy of probability forecasts. It is illustrated on the Logistic Map, the Henon Map and the 12-D Lorenz96 flow, and its ability to outperform linear least squares in these systems is explored at various noise levels and sampling rates. As expected, it is more effective when the forecast error distributions are non-Gaussian. The new method selects parameter values by minimizing a proper, local skill score for continuous probability forecasts as a function of the parameter values. This new approach is easier to implement in practice than alternative nonlinear methods based on the geometry of attractors or the ability of the model to shadow the observations. New direct measures of inadequacy in the model, the "Implied Ignorance" and the information deficit are introduced.

Hailiang Du; Leonard A. Smith

2012-06-06T23:59:59.000Z

312

Gravity dual of the Ising model  

Science Journals Connector (OSTI)

We evaluate the partition function of three-dimensional theories of gravity in the quantum regime, where the anti–de Sitter (AdS) radius is Planck scale and the central charge is of order one. The contribution from the AdS vacuum sector can—with certain assumptions—be computed and equals the vacuum character of a minimal model conformal field theory. The torus partition function is given by a sum over geometries which is finite and computable. For generic values of Newton’s constant G and the AdS radius ?, the result has no Hilbert space interpretation, but in certain cases it agrees with the partition function of a known conformal field theory. For example, the partition function of pure Einstein gravity with G=3? equals that of the Ising model, providing evidence that these theories are dual. We also present somewhat weaker evidence that the three-state and tricritical Potts models are dual to pure higher spin theories of gravity based on SL(3) and E6, respectively.

Alejandra Castro; Matthias R. Gaberdiel; Thomas Hartman; Alexander Maloney; Roberto Volpato

2012-01-19T23:59:59.000Z

313

Estimating the Impact of Water Pricing on Water Use Efficiency in Semi-arid Cropping System: An Application of Probabilistically Constrained Nonparametric Efficiency Analysis  

Science Journals Connector (OSTI)

By introducing proper pricing instruments, farm level water can be used more efficient. But it ... demands a proper estimation strategy to analyse the efficiency and the input use behavior of farms ... analysis (...

Prakashan Chellattan Veettil; Stijn Speelman…

2013-01-01T23:59:59.000Z

314

Designing a Dynamic Data-Driven Application System for Estimating Real-Time Load of Dissolved Organic Carbon in a River  

Science Journals Connector (OSTI)

Understanding the dynamics of naturally occurring dissolved organic carbon (DOC) in a river is central to estimating surface water quality, aquatic carbon cycling, and global climate change. Currently, determinat...

Ying Ouyang

2012-10-01T23:59:59.000Z

315

Primal-Dual Combinatorial Algorithms May 8, 2009  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Primal Dual Algorithms for Fractional Packing and Covering 9 3.1 Feasibility Problem algorithm for fractional packing and covering, which greatly outperformed previous approaches on the a largePrimal-Dual Combinatorial Algorithms Qihui Zhu May 8, 2009 #12;ABSTRACT Linear program and its

Plotkin, Joshua B.

316

Evaluation of liquid lift approach to dual gradient  

E-Print Network (OSTI)

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2009-05-15T23:59:59.000Z

317

Evaluation of liquid lift approach to dual gradient drilling  

E-Print Network (OSTI)

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2008-10-10T23:59:59.000Z

318

Stable lattice Boltzmann schemes with a dual entropy approach  

E-Print Network (OSTI)

Stable lattice Boltzmann schemes with a dual entropy approach for monodimensional nonlinear waves of a lattice Boltzmann scheme. This method is expressed in terms of the dual of the mathematical entropy with D1Q3 lattice Boltzmann schemes for the Burgers equation. It conducts to the explicitation of three

Boyer, Edmond

319

Characterization Of State Estimation Biases  

Science Journals Connector (OSTI)

The control and operation of an electric power system is based on the ability to determine the state of the system in real time. State estimation (SE) has been introduced in the 1960s to achieve this objective. The initial implementation was based on ...

A. P. Sakis Meliopoulos; George K. Stefopoulos

2006-01-01T23:59:59.000Z

320

On Parallelizing Dual Decomposition in Stochastic Integer Programming |  

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

On Parallelizing Dual Decomposition in Stochastic Integer Programming On Parallelizing Dual Decomposition in Stochastic Integer Programming Title On Parallelizing Dual Decomposition in Stochastic Integer Programming Publication Type Journal Article Year of Publication 2013 Authors Lubin, M, Martin, K, Petra, CG, Sandikci, B Journal Operations Research Letters Volume 41 Start Page 252-258 Issue 3 Date Published 05/2013 Other Numbers ANL/MCS-P3037-0912 Abstract For stochastic mixed-integer programs, we revisit the dual decomposition algorithm of Care and Schultz from a computational perspective with the aim of its parallelization. We address an important bottleneck of parallel execution by identifying a formulation that permits the parallel solution of the master program by using structure-exploiting interior-point solvers. Our results demonstrate the potential for parallel speedup and the importance of regularization (stabilization) in the dual optimization. Load imbalance is identified as a remaining barrier to parallel scalability.

Note: This page contains sample records for the topic "dual system estimation" 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

Dual Rater Competency Assessment FAQ | Department of Energy  

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

Dual Rater Competency Assessment FAQ Dual Rater Competency Assessment FAQ Dual Rater Competency Assessment FAQ 1. What is the purpose of the dual rater assessments? The purpose of the dual rater competency assessment is to provide a clearer picture of the individual's developmental needs by combining self-assessment and supervisory input. Together, these two viewpoints provide a more informed assessment of individual strengths and developmental needs. Managers/supervisors and employees will be able to use competency assessment results to identify and address critical skills gaps through targeted training and development. From an organizational perspective, the competency assessment process enables organizations to assess workforce competencies and helps ensure its current workforce has the right knowledge and skills to accomplish the

322

Dual-bonded catalyst layer structure cathode for PEMFC  

Science Journals Connector (OSTI)

Novel electrode structure based on dual-bonded catalyst layer structure is reported to elevate proton exchange membrane fuel cell (PEMFC) cathode performance. Differing from conventional cathode with simplex PTFE or ionomer as binder material in catalyst layer (CL), dual-bonded CL combines those two types of binders, respectively, in a composite structure. In order to develop a cathode possessing the superior merits of both mass transport and proton transfer, a PTFE-rich CL and an ionomer-rich CL were fabricated on gas diffusion layer in proper order. Polarization characteristic of cathodes with dual-bonded CL, conventional PTFE-bonded CL and ionomer-bonded CL were evaluated at ambient pressure in oxygen/air. Better performance of cathode was achieved with dual-bonded, compared with conventional structures. Electric yield rate of dual-bonded cathode was about 50%, whilst that of conventional cathodes was about 40%.

Xuewei Zhang; Pengfei Shi

2006-01-01T23:59:59.000Z

323

Fault detection and isolation of a dual spool gas turbine engine using dynamic neural networks and multiple model approach  

Science Journals Connector (OSTI)

In this paper, a fault detection and isolation (FDI) scheme for an aircraft jet engine is developed. The proposed FDI system is based on the multiple model approach and utilizes dynamic neural networks (DNNs) to accomplish this goal. Towards this end, ... Keywords: Bank of detection and isolation filters, Dual spool gas turbine engine, Dynamic neural networks, Fault diagnosis, Multiple model scheme

Z. N. Sadough Vanini; K. Khorasani; N. Meskin

2014-02-01T23:59:59.000Z

324

Model-based image reconstruction for dual-energy X-ray CT with fast KVP switching  

Science Journals Connector (OSTI)

The most recent generation of X-ray CT systems can collect dual energy (DE) sinograms by rapidly switching the X-ray tube voltage between two levels for alternate projection views. This reduces motion artifacts in DE imaging, but yields sinograms that ... Keywords: dualenergy X-ray computed tomography, model-based image reconstruction, penalized likelihood

Wonseok Huh; Jeffrey A. Fessler

2009-06-01T23:59:59.000Z

325

S-Band Dual-Polarization Radar Observations of Winter Storms PATRICK C. KENNEDY AND STEVEN A. RUTLEDGE  

E-Print Network (OSTI)

S-Band Dual-Polarization Radar Observations of Winter Storms PATRICK C. KENNEDY AND STEVEN A­Illinois State Water Survey (CSU­CHILL) system during four significant winter storms in northeastern Colorado. It was found that values of specific differential phase KDP often reached local maxima of ;0.158­0.48 km21

Rutledge, Steven

326

S-Band Dual Polarization Radar Observations of Winter Storms Patrick C. Kennedy and Steven A. Rutledge  

E-Print Network (OSTI)

1 S-Band Dual Polarization Radar Observations of Winter Storms Patrick C. Kennedy and Steven A wavelength CSU-CHILL system during four significant winter storms in northeastern Colorado. It was found that specific differential phase (KDP) values often reached local maxima of ~0.15 to 0.4o km-1 in an elevated

Rutledge, Steven

327

Technical Support to SBIR Phase II Project: Improved Conversion of Cellulose Waste to Ethanol Using a Dual Bioreactor System: Cooperative Research and Development Final Report, CRADA Number CRD-08-310  

SciTech Connect

Over-dependence on fossil fuel has spurred research on alternative energy. Inedible plant materials such as grass and corn stover represent abundant renewable natural resources that can be transformed into biofuel. Problems in enzymatic conversion of biomass to sugars include the use of incomplete synergistic enzymes, end-product inhibition, and adsorption and loss of enzymes necessitating their use in large quantities. Technova Corporation will develop a defined consortium of natural microorganisms that will efficiently break down biomass to energy-rich soluble sugars, and convert them to cleaner-burning ethanol fuel. The project will also develop a novel biocatalytic hybrid reactor system dedicated to this bioprocess, which embodies recent advances in nanotechnology. NREL will participate to develop a continuous fermentation process.

Zhang, M.

2013-04-01T23:59:59.000Z

328

Measurement enhancement for state estimation  

E-Print Network (OSTI)

, the control center receives the system-wide device information and measurement data through the Supervisory Control and Data Acquisition (SCADA) system. However, the information and measurement data provided by SCADA may not always be accurate and reliable... estimation use the measurement data from SCADA system, the status information about the circuit breakers (CB), switches and transformer taps, as well as the parameters of transmission lines, transformers, shunts capacitors/reactors and other devices...

Chen, Jian

2009-05-15T23:59:59.000Z

329

Dual-fueling turbocharged diesels with ethanol  

SciTech Connect

Spray addition and carburetion methods were tested for dual-fueling a turbocharged, 65 kW diesel tractor. Approximately 30 percent of the fuel energy for the tractor was supplied by spraying ethanol into the intake air and about 46 percent by carburetion with little affect on the engine thermal efficiency. Further substitution of diesel fuel with ethanol was limited by knock. As the amount of ethanol fed into the engine was increased, ignition apparently changed from the steady burning process which normally occurs in a diesel engine to a rapid explosion which caused knock. The best fuel for the spray approach was a 50 percent ethanol/water solution and with the carburetor it was an 80 percent ethanol/water solution. (Refs. 6).

Cruz, J.M.; Rotz, C.A.; Watson, D.H.

1982-09-01T23:59:59.000Z

330

Dual-fueling turbocharged diesels with ethanol  

SciTech Connect

Spray addition and carburetion methods were tested for dual-fueling a turbocharged, 65 kW diesel tractor. Approximately 30 percent of the fuel energy for the tractor was supplied by spraying ethanol into the intake air and about 46 percent by carburetion with little affect on the engine thermal efficiency. Further substitution of diesel fuel with ethanol was limited by knock. As the amount of ethanol fed into the engine was increased, ignition apparently changed from the steady burning process which normally occurs in a diesel engine to a rapid explosion which caused knock. The best fuel for the spray approach was a 50 percent ethanol/water solution and with the carburetor it was an 80 percent ethanol/water solution.

Cruz, J.M.; Rotz, C.A.; Watson, D.H.

1982-09-01T23:59:59.000Z

331

Internal Dose Estimates from  

E-Print Network (OSTI)

Appendix F Internal Dose Estimates from NTS Fallout F-1 #12;Radiation Dose to the Population;TABLE OF CONTENTS Page F- Part I. Estimates of Dose...........................................................................................40 Comparison to dose estimates from global fallout

332

Absolute CF{sub 2} density and gas temperature measurements by absorption spectroscopy in dual-frequency capacitively coupled CF{sub 4}/Ar plasmas  

SciTech Connect

Broadband ultraviolet absorption spectroscopy has been used to determine the CF{sub 2} radical density in dual-frequency capacitively coupled CF{sub 4}/Ar plasmas, using the CF{sub 2} A{sup ~1}B{sub 1}?X{sup ~1}A{sub 1} system of absorption spectrum. The rotational temperature of ground state CF{sub 2} and excited state CF was also estimated by using A{sup ~1}B{sub 1}?X{sup ~1}A{sub 1} system and B{sup 2}??X{sup 2}? system, respectively. The translational gas temperature was deduced from the Doppler width of the Ar{sup *}({sup 3}P{sub 2}) and Ar{sup *}({sup 3}P{sub 0}) metastable atoms absorption line by using the tunable diode laser absorption spectroscopy. The rotational temperatures of the excited state CF are about 100?K higher than those of ground state CF{sub 2}, and about 200?K higher than the translational gas temperatures. The dependences of the radical CF{sub 2} density, electron density, electron temperature, rotational temperature, and gas temperature on the high frequency power and pressure have been analyzed. Furthermore, the production and loss mechanisms of CF{sub 2} radical and the gas heating mechanisms have also been discussed.

Liu, Wen-Yao; Xu, Yong, E-mail: yongxu@dlut.edu.cn; Peng, Fei; Gong, Fa-Ping; Li, Xiao-Song; Zhu, Ai-Min [Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024 (China); Liu, Yong-Xin; Wang, You-Nian [Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

2014-10-15T23:59:59.000Z

333

Tracking formulas and strategies for a receiver oriented dual-axis tracking toroidal heliostat  

SciTech Connect

A 4 m x 4 m toroidal heliostat with receiver oriented dual-axis tracking, also called spinning-elevation tracking, was developed as an auxiliary heat source for a hydrogen production system. A series of spinning-elevation tracking formulas have been derived for this heliostat. This included basic tracking formulas, a formula for the elevation angle for heliostat with a mirror-pivot offset, and a more general formula for the biased elevation angle. This paper presents the new tracking formulas in detail and analyzes the accuracy of applying a simplifying approximation. The numerical results show these receiver oriented dual-axis tracking formula approximations are accurate to within 2.5 x 10{sup -6} m in image plane. Some practical tracking strategies are discussed briefly. Solar images from the toroidal heliostat at selected times are also presented. (author)

Guo, Minghuan; Wang, Zhifeng; Liang, Wenfeng; Zhang, Xiliang; Zang, Chuncheng [Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing 100190 (China); Lu, Zhenwu; Wei, Xiudong [Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Jilin 130033 (China)

2010-06-15T23:59:59.000Z

334

Indirect-fired gas turbine dual fuel cell power cycle  

DOE Patents (OSTI)

A fuel cell and gas turbine combined cycle system which includes dual fuel cell cycles combined with a gas turbine cycle wherein a solid oxide fuel cell cycle operated at a pressure of between 6 to 15 atms tops the turbine cycle and is used to produce CO.sub.2 for a molten carbonate fuel cell cycle which bottoms the turbine and is operated at essentially atmospheric pressure. A high pressure combustor is used to combust the excess fuel from the topping fuel cell cycle to further heat the pressurized gas driving the turbine. A low pressure combustor is used to combust the excess fuel from the bottoming fuel cell to reheat the gas stream passing out of the turbine which is used to preheat the pressurized air stream entering the topping fuel cell before passing into the bottoming fuel cell cathode. The CO.sub.2 generated in the solid oxide fuel cell cycle cascades through the system to the molten carbonate fuel cell cycle cathode.

Micheli, Paul L. (Sacramento, CA); Williams, Mark C. (Morgantown, WV); Sudhoff, Frederick A. (Morgantown, WV)

1996-01-01T23:59:59.000Z

335

Dual energy scanning beam laminographic x-radiography  

DOE Patents (OSTI)

A multiple x-ray energy level imaging system includes a scanning x-ray beam and two detector design having a first low x-ray energy sensitive detector and a second high x-ray energy sensitive detector. The low x-ray energy detector is placed next to or in front of the high x-ray energy detector. The low energy sensitive detector has small stopping power for x-rays. The lower energy x-rays are absorbed and converted into electrical signals while the majority of the higher energy x-rays pass through undetected. The high energy sensitive detector has a large stopping power for x-rays as well as it having a filter placed between it and the object to absorb the lower energy x-rays. In a second embodiment; a single energy sensitive detector is provided which provides an output signal proportional to the amount of energy in each individual x-ray it absorbed. It can then have an electronic threshold or thresholds set to select two or more energy ranges for the images. By having multiple detectors located at different positions, a dual energy laminography system is possible.

Majewski, Stanislaw (Grafton, VA); Wojcik, Randolph F. (Yorktown, VA)

1998-01-01T23:59:59.000Z

336

Dual energy scanning beam laminographic x-radiography  

DOE Patents (OSTI)

A multiple x-ray energy level imaging system includes a scanning x-ray beam and two detector design having a first low x-ray energy sensitive detector and a second high x-ray energy sensitive detector. The low x-ray energy detector is placed next to or in front of the high x-ray energy detector. The low energy sensitive detector has small stopping power for x-rays. The lower energy x-rays are absorbed and converted into electrical signals while the majority of the higher energy x-rays pass through undetected. The high energy sensitive detector has a large stopping power for x-rays as well as it having a filter placed between it and the object to absorb the lower energy x-rays. In a second embodiment; a single energy sensitive detector is provided which provides an output signal proportional to the amount of energy in each individual x-ray it absorbed. It can then have an electronic threshold or thresholds set to select two or more energy ranges for the images. By having multiple detectors located at different positions, a dual energy laminography system is possible. 6 figs.

Majewski, S.; Wojcik, R.F.

1998-04-21T23:59:59.000Z

337

A robustness application for linear estimation  

E-Print Network (OSTI)

, recursive algorithm for yielding estimates of the state of a linear dynamic system (see, for example, the excellent tutorial [1]). Many other applications of this estimation scheme exist in the areas of signal processing, power systems, telecommunications... on robustness causes the coefficient which maximizes J to approach the coefficient which produces maximum robustness. 37 REFERENCES [1] I. B. Rhodes, "A Tutorial Introduction to Estimation and Filtering, "IEEE Trans. on Automatic Control, vol. AC-16, pp...

Kitzman, Kenneth Victor

1990-01-01T23:59:59.000Z

338

870 IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING, VOL. 22, NO. 4, JULY 2014 Estimation of Human Ankle Impedance During  

E-Print Network (OSTI)

Estimation of Human Ankle Impedance During the Stance Phase of Walking Elliott J. Rouse, Member, IEEE, Levi J interact with their environ- ments. It is critical to characterize ankle impedance during the stance phase of walking to elucidate how ankle impedance is reg- ulated during locomotion, as well as provide

Perreault, Eric J.

339

Preprint version 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems, Tokyo, Japan A Comparison of Scale Estimation Schemes for a Quadrotor UAV  

E-Print Network (OSTI)

, Japan A Comparison of Scale Estimation Schemes for a Quadrotor UAV based on Optical Flow and IMU of autonomous UAV flight control, cameras are ubiquitously exploited as a cheap and effective onboard sensor linear velocity in the UAV body frame from direct measurement of the instantaneous (and non

340

Development of an automated methodology for calibration of simplified air-side HVAC system models and estimation of potential savings from retrofit/commissioning measures  

E-Print Network (OSTI)

2.5 Potential Savings in Commercial Buildings .......................................... 18 2.6 Energy Benchmarking Strategies for Commercial Buildings................ 19 2.7 Summary... OF POTENTIAL ENERGY SAVINGS IN COMMERCIAL BUILDINGS .............................. 78 5.1 Potential Savings Estimation Methodology........................................... 78 5.2 Mathematical Formulation of the Potential Savings Methodology...

Baltazar Cervantes, Juan Carlos

2007-04-25T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Cost Estimation Package  

Directives, Delegations, and Requirements

This chapter focuses on the components (or elements) of the cost estimation package and their documentation.

1997-03-28T23:59:59.000Z

342

Dual attitude and parameter estimation of passively magnetically stabilized nano satellites$  

E-Print Network (OSTI)

satellite using few, small sensors. A candidate minimal sensor set would be the spacecraft's own solar attitude sensors, a result of having small budgets for mass and power. Attitude determination can still be performed on a nano satellite with low fidelity sensors, but an accurate model of the spacecraft attitude

343

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility  

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

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons. At the Los Alamos National Laboratory (LANL), the Dual-Axis Radiographic Hydrodynamic Test Facility, or DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons.

344

Potential use of hollow spheres in dual gradient drilling  

E-Print Network (OSTI)

The increasing number of significant deepwater discoveries has pushed the operator and service oil companies to focus their efforts on developing new technologies to drill in deeper water. Dual gradient drilling (DGD) will allow reaching deeper...

Vera Vera, Liliana

2012-06-07T23:59:59.000Z

345

Ring Involutions and Self-Dual Codes Jay A. Wood  

E-Print Network (OSTI)

Ring Involutions and Self-Dual Codes Jay A. Wood Department of Mathematics Western Michigan University jay.wood@wmich.edu AMS meeting, Lexington, Kentucky March 27, 2010 #12;Acknowledgments Much

Wood, Jay

346

Lean NOx Reduction with Dual Layer LNT/SCR Catalysts  

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

Results show that a series of dual layer catalysts with a bottom layer of LNT catalyst and a top layer of SCR catalyst can carry out coupled ammonia generation and NOx reduction, achieving high NOx conversion with minimal ammonia slip

347

Primal-dual coding to probe light transport  

E-Print Network (OSTI)

We present primal-dual coding, a photography technique that enables direct fine-grain control over which light paths contribute to a photo. We achieve this by projecting a sequence of patterns onto the scene while the ...

O'Toole, Matthew

348

EIS-0228: Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility  

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

This EIS evaluates the potential environmental impact of a proposal to construct and operate the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL)...

349

Simulation of biomass gasification in a dual fluidized bed gasifier  

Science Journals Connector (OSTI)

Biomass gasification with steam in a dual-fluidized bed gasifier (DFBG) was simulated with ASPEN Plus. ... that the content of char transferred from the gasifier to the combustor decreases from 22.5...2 concentra...

Jie He; Kristina Göransson; Ulf Söderlind…

2012-03-01T23:59:59.000Z

350

Economizer Applications in Dual-Duct Air-Handling Units  

E-Print Network (OSTI)

This paper provides analytical tools and engineering methods to evaluate the feasibility of the economizer for dual-duct air-handling units. The results show that the economizer decreases cooling energy consumption without heating energy penalties...

Joo, I.; Liu, M.

2002-01-01T23:59:59.000Z

351

Recovery of primal solution in dual subgradient schemes  

E-Print Network (OSTI)

In this thesis, we study primal solutions for general optimization problems. In particular, we employ the subgradient method to solve the Lagrangian dual of a convex constrained problem, and use a primal-averaging scheme ...

Ma, Jing, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

352

Dual Models of Permutation Problems Barbara M. Smith  

E-Print Network (OSTI)

Dual Models of Permutation Problems Barbara M. Smith School of Computing & Mathematics University of Huddersfield Huddersfield HD1 3DH, U.K. b.m.smith@hud.ac.uk Abstract. A constraint satisfaction problem

Smith, Barbara M.

353

CONVERGENCE RATE ANALYSIS OF PRIMAL-DUAL SPLITTING ...  

E-Print Network (OSTI)

Abstract. Primal-dual splitting schemes are a class of powerful algorithms ... this paper, we are mainly concerned with the line of work that began in [38, 14, 23].

2014-08-19T23:59:59.000Z

354

Alternative Fuels Data Center: Idaho National Laboratory Dual...  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

890-square-mile site. The fleet reduces the number of passenger vehicle miles, and their carbon emissions, and increases passenger safety during bad weather. The dual-fuel...

355

Estimation the Performance of Solar Fiber Optic Lighting System after Repairing the Glass Fiber Cables in a South Korean Residential Building  

E-Print Network (OSTI)

The solar fiber optic lighting system consists of the solar ray concentrating apparatus, the tracking control, lighting transmission and emission parts. This system was installed on a 20-storey apartment building in South Korea. Many residents had...

Cha, K. S.; Kim, T. K.; Park, M. S.

356

Site characterization: a spatial estimation approach  

SciTech Connect

In this report the application of spatial estimation techniques or kriging to groundwater aquifers and geological borehole data is considered. The adequacy of these techniques to reliably develop contour maps from various data sets is investigated. The estimator is developed theoretically in a simplified fashion using vector-matrix calculus. The practice of spatial estimation is discussed and the estimator is then applied to two groundwater aquifer systems and used also to investigate geological formations from borehole data. It is shown that the estimator can provide reasonable results when designed properly.

Candy, J.V.; Mao, N.

1980-10-01T23:59:59.000Z

357

The Philosophy and Feasibility of Dual Readout Calorimetry  

SciTech Connect

I will discuss the general physical ideas behind dual-readout calorimetry, their implementation in DREAM (Dual REAdout Module) with exact separation of scintillation and Cerenkov light, implementation with mixed light in DREAM fibers, anticipated implementation in PbWO4 crystals with applications to the 4th Concept detector and to CMS, use in high energy gamma-ray and cosmic ray astrophysics with Cerenkov and N2 fluorescent light, and implementation in the 4th Concept detector for muon identification.

Hauptman, John [Physics, Iowa State University, Ames IA 50011 (United States)

2006-10-27T23:59:59.000Z

358

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, E.

1984-04-10T23:59:59.000Z

359

The holographic dual of an EPR pair has a wormhole  

E-Print Network (OSTI)

We construct the holographic dual of two colored quasiparticles in maximally supersymmetric Yang-Mills theory entangled in a color singlet EPR pair. In the holographic dual the entanglement is encoded in a geometry of a non-traversable wormhole on the worldsheet of the flux tube connecting the pair. This gives a simple example supporting the recent claim by Maldacena and Susskind that EPR pairs and non-traversable wormholes are equivalent descriptions of the same physics.

Jensen, Kristan

2013-01-01T23:59:59.000Z

360

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, Eugene (Coram, NY)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Dual-phase evolution in complex adaptive systems  

Science Journals Connector (OSTI)

...to social networks to body plans and ecosystems, exhibit modular...in this way outperforms the standard algorithm on a number of hard...algorithms; a comprehensive review is provided by Cantu-Paz...research. Here we briefly review two widely used concepts-SOC...

2011-01-01T23:59:59.000Z

362

Engineering a Synthetic Dual-Organism System for Hydrogen Production  

Science Journals Connector (OSTI)

...promising renewable energy source as pressure...but they are also energy intensive and therefore...due to its use of renewable biomass or sunlight as its primary energy source. Hydrogen...due to the current cost of its chemical synthesis...

Zeev Waks; Pamela A. Silver

2009-02-06T23:59:59.000Z

363

Check Estimates and Independent Costs  

Directives, Delegations, and Requirements

Check estimates and independent cost estimates (ICEs) are tools that can be used to validate a cost estimate. Estimate validation entails an objective review of the estimate to ensure that estimate criteria and requirements have been met and well documented, defensible estimate has been developed. This chapter describes check estimates and their procedures and various types of independent cost estimates.

1997-03-28T23:59:59.000Z

364

Ethanol diesel dual fuel clean combustion with FPGA enabled control  

Science Journals Connector (OSTI)

Sophisticated engine controls have progressively become vital enablers for implementing clean and efficient combustion. The low temperature combustion in diesel engines is a viable combustion mode that offers ultra-low nitrogen oxides and dry soot emissions, yet only feasible under tightly controlled operating conditions. In this work, the dual fuel application of ethanol and diesel is studied for clean and efficient combustion. A set of real-time controllers has been configured to control the common-rail pressure and injection events, in concert with the use of two fuels in a high compression ratio diesel engine. An improved control algorithm has been implemented into the field programmable gate array devices to promptly execute the injection commands of the port and direct injection events. Such reliable and prompt control of fuel injection has been identified as critical to safely enable simultaneously low nitrogen oxides and soot combustion, especially when excessive or inadequate rate of exhaust gas recirculation is imminent. High load clean combustion was achieved with the improved control system.

Xiaoye Han; Jimi Tjong; Graham T. Reader; Ming Zheng

2014-01-01T23:59:59.000Z

365

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be performed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described. 6 figs.

Vail, W.B. III.

1989-02-14T23:59:59.000Z

366

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in gelogical formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleous present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described.

Vail, III, William B. (Bothell, WA)

1989-01-01T23:59:59.000Z

367

Guidelines for Estimating Unmetered Industrial Water Use  

SciTech Connect

The document provides a methodology to estimate unmetered industrial water use for evaporative cooling systems, steam generating boiler systems, batch process applications, and wash systems. For each category standard mathematical relationships are summarized and provided in a single resource to assist Federal agencies in developing an initial estimate of their industrial water use. The approach incorporates industry norms, general rules of thumb, and industry survey information to provide methodologies for each section.

Boyd, Brian K.

2010-08-01T23:59:59.000Z

368

8th International Conference on Probability Methods Applied to Power Systems, Ames Iowa, September 2004 Estimating Failure Propagation in Models of  

E-Print Network (OSTI)

and a power systems blackout model of cascading transmission line overloads. The comparisons suggest stage. OPA is a power system blackout model that represents probabilistic cascading line outages. The initial disturbance is generated by random line outages and load variations. Overloaded lines outage

369

Radiation Dose Estimates from  

E-Print Network (OSTI)

Summary: Radiation Dose Estimates from Hanford Radioactive Material Releases to the Air- tantly, what radiation dose people may have received. An independent Technical Steering Panel (TSP, additionalProjectworkcouldresultin revisions of these dose estimates. April 21, 1994 Companion

370

State Energy Production Estimates  

U.S. Energy Information Administration (EIA) Indexed Site

State Energy Production Estimates 1960 Through 2012 2012 Summary Tables Table P1. Energy Production Estimates in Physical Units, 2012 Alabama 19,455 215,710 9,525 0 Alaska 2,052...

371

Types of Cost Estimates  

Directives, Delegations, and Requirements

The chapter describes the estimates required on government-managed projects for both general construction and environmental management.

1997-03-28T23:59:59.000Z

372

Visible light stimulating dual-wavelength emission and O vacancy involved energy transfer behavior in luminescence for coaxial nanocable arrays  

SciTech Connect

We report a strategy to investigate O vacancy (V{sub O}) involved energy transfer and dual-wavelength yellow emission in coaxial nanocable. By electric field deposition and subsequent sol-gel template approach, ZnO:Tb/Y{sub 2}O{sub 3}:Eu coaxial nanocable arrays are synthesized. After visible light excitation, system is promoted to O vacancy charge transfer state of V{sub O}(0/+). In the following cross relaxation, energy transfer from V{sub O} to the excitation energy level of Tb{sup 3+} in ZnO:Tb core area. While in Y{sub 2}O{sub 3}:Eu shell area, energy transfer to the excitation energy level of Eu{sup 3+}. Subsequently, dual-wavelength emission is observed. By constructing nanocable with dual-wavelength emission, yellow luminescence is obtained. Adjust doping concentration of Eu{sup 3+} or Tb{sup 3+} in the range of 0.01–0.05, chromaticity coordinates of ZnO:Tb/Y{sub 2}O{sub 3}:Eu nanocable stably stays at yellow region in color space except ZnO:Tb{sub 0.01}/Y{sub 2}O{sub 3}:Eu{sub 0.01}. As Vo states act as media in energy transfer process in nanocablers, visible light can stimulate dual-wavelength emissions. Yellow luminescent nanocable arrays will have great applications in light-emitting diode luminescence.

Yang, Lei, E-mail: nanoyang@qq.com [College of Materials Science and Engineering, Hunan University, Changsha 410082 (China); Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha 410082 (China); Dong, Jiazhang; Jiang, Zhongcheng [College of Materials Science and Engineering, Hunan University, Changsha 410082 (China); Pan, Anlian; Zhuang, Xiujuan [Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha 410082 (China)

2014-06-14T23:59:59.000Z

373

D3-D7 holographic dual of a perturbed 3D CFT  

Science Journals Connector (OSTI)

An appropriately oriented D3-D7-brane system is the holographic dual of relativistic fermions occupying a 2+1-dimensional defect embedded in a 3+1-dimensional spacetime. The fermions interact via fields of N=4 Yang-Mills theory in the 3+1-dimensional bulk. Recently, using internal flux to stabilize the system in the probe N7?N3 limit, a number of solutions which are dual to conformal field theories with fermion content have been found. We use holographic techniques to study perturbations of a particular one of the conformal field theories by relevant operators. Generally, the response of a conformal field theory to such a perturbation grows and becomes nonperturbative at low energy scales. We shall find that a perturbation which switches on a background magnetic field B and fermion mass m induces a renormalization group flow that can be studied perturbatively in the limit of small m2/B. We solve the leading order explicitly. We find that, for one particular value of internal flux, the system exhibits magnetic catalysis, the spontaneous breaking of chiral symmetry enhanced by the presence of the magnetic field. In the process, we derive formulas predicting the Debye screening length of the fermion-antifermion plasma at finite density and the diamagnetic moment of the ground state of the fermion system in the presence of a magnetic field.

Hamid Omid and Gordon W. Semenoff

2013-07-10T23:59:59.000Z

374

State energy data report 1994: Consumption estimates  

SciTech Connect

This document provides annual time series estimates of State-level energy consumption by major economic sector. The estimates are developed in the State Energy Data System (SEDS), operated by EIA. SEDS provides State energy consumption estimates to members of Congress, Federal and State agencies, and the general public, and provides the historical series needed for EIA`s energy models. Division is made for each energy type and end use sector. Nuclear electric power is included.

NONE

1996-10-01T23:59:59.000Z

375

External Dose Estimates from  

E-Print Network (OSTI)

Appendix G External Dose Estimates from Global Fallout G-1 #12;External Radiation Exposure-MQ-003539 March 15, 2000 G-2 #12;Abstract This report provides estimates of the external radiation-62. Estimates are given on a county by county basis for each month from 1953-1972. The average population dose

376

External Dose Estimates from  

E-Print Network (OSTI)

Appendix E External Dose Estimates from NTS Fallout E-1 #12;External Radiation Exposure. 1, 1999) E-2 #12;Abstract This report provides estimates of the external radiation exposure of this report to: "Prepare crude estimates of the doses from external irradiation received by the American

377

Parallel State Estimation Assessment with Practical Data  

SciTech Connect

This paper presents a full-cycle parallel state estimation (PSE) implementation using a preconditioned conjugate gradient algorithm. The developed code is able to solve large-size power system state estimation within 5 seconds using real-world data, comparable to the Supervisory Control And Data Acquisition (SCADA) rate. This achievement allows the operators to know the system status much faster to help improve grid reliability. Case study results of the Bonneville Power Administration (BPA) system with real measurements are presented. The benefits of fast state estimation are also discussed.

Chen, Yousu; Jin, Shuangshuang; Rice, Mark J.; Huang, Zhenyu

2014-10-31T23:59:59.000Z

378

Experimental analysis of a diesel engine operating in Diesel–Ethanol Dual-Fuel mode  

Science Journals Connector (OSTI)

Abstract The use of engines is necessary to keep the world moving. Such engines are fed mainly by fossil fuels, among these, the diesel. The operation and the behavior of engines in different thermodynamic cycles, with common fossil fuels, it is still challenging but, in general, it has well known and documented data. On the other hand, for alternative fuels, there is still demand of experimental data, particularly considering that it is desirable, most of the times, the use of a system with dual mode (reversible). Such systems are called Dual-Fuel, it brings a greater degree of freedom, but imply in technological challenges. In this paper we used an engine operating with single cylinder direct injection diesel and port ethanol injection system in Dual-Fuel mode with a 100% electronically controlled calibration. The methodology applied was, once the engine calibration was given to achieve the best specific fuel consumption or the MBT (Maximum Brake Torque) in each load condition, to gradually substitute the diesel oil by ethanol in compliance with the requirements established. Comparisons were made among working conditions considering the rate of diesel substitution and the energy indicated efficiency. Initially, the flow structure in the combustion chamber was tested in both ‘quiescent’ and high “swirl” modes. Compression ratios were adjusted at 3 different levels: 14:1, 16:1 and 17:1. It was tested two injectors, the first one of 35 g/s and another of 45 g/s. Regarding pressure diesel injection, 4 levels were investigated namely 800, 1000, 1200 and 1400 bar.

Roberto Freitas Britto Jr.; Cristiane Aparecida Martins

2014-01-01T23:59:59.000Z

379

Estimated Cost Description Determination Date:  

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

and posted 2/10/2011 and posted 2/10/2011 *Title, Location Estimated Cost Description Determination Date: uncertain Transmittal to State: uncertain EA Approval: uncertain $50,000 FONSI: uncertain Determination Date: uncertain Transmittal to State: uncertain EA Approval: uncertain FONSI: uncertain Total Estimated Cost $70,000 Attachment: Memo, Moody to Marcinowski, III, SUBJECT: NEPA 2011 APS for DOE-SRS, Dated: Annual NEPA Planning Summary Environmental Assessments (EAs) Expected to be Initiated in the Next 12 Months Department of Energy (DOE) Savannah River Site (SRS) Jan-11 Estimated Schedule (**NEPA Milestones) South Carolina Department of Health and Environmental Control (SCDHEC) issued a National Pollutant Discharge Elimination System (NPDES) Industrial Stormwater General Permit (IGP) # SCR000000 November 12, with an effective date of January

380

Studies on the Applicability of Biomarkers in Estimating the Systemic Bioavailability of Polynuclear Aromatic Hydrocarbons from Manufactured Gas Plant Tar-Contaminated Soils  

Science Journals Connector (OSTI)

The systemic bioavailability of polynuclear aromatic hydrocarbons (PAH) from ingested soils containing manufactured gas plant (MGP) tar was evaluated in mice. Soil and organic extract of each soil were incorporated into a diet and fed to mice for two ...

Aruna Koganti; Deborah A. Spina; Kimberly Rozett; Bing-Li Ma; Eric H. Weyand; Barbara B. Taylor; David M. Mauro

1998-08-25T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Behavior of Inorganic Matter in a Dual Fluidized Steam Gasification Plant  

Science Journals Connector (OSTI)

The principle of DFB steam gasification is based on the separation of the endothermic gasification process and the external heat supply from a separate combustion chamber. ... The precoat material described in Table 8 shows a typical composition of the natural mineral dolomite, whose main components are calcium and magnesium oxide, with a high ignition loss at 1050 °C, when the carbonates are released. ... On the basis of a dual fluidized bed system, steam gasification of biomass is coupled with in situ CO2 absorption to enhance the formation of hydrogen. ...

Friedrich Kirnbauer; Markus Koch; Reinhard Koch; Christian Aichernig; Hermann Hofbauer

2013-05-29T23:59:59.000Z

382

Dual-etalon cavity ring-down frequency-comb spectroscopy with broad band light source  

DOE Patents (OSTI)

In an embodiment, a dual-etalon cavity-ring-down frequency-comb spectrometer system is described. A broad band light source is split into two beams. One beam travels through a first etalon and a sample under test, while the other beam travels through a second etalon, and the two beams are recombined onto a single detector. If the free spectral ranges ("FSR") of the two etalons are not identical, the interference pattern at the detector will consist of a series of beat frequencies. By monitoring these beat frequencies, optical frequencies where light is absorbed may be determined.

Chandler, David W; Strecker, Kevin E

2014-04-01T23:59:59.000Z

383

Generalized cell–dual-cell transformation and exact thresholds for percolation  

Science Journals Connector (OSTI)

Suggested by Scullard’s recent star-triangle relation for correlated bond systems, we propose a general “cell–dual-cell” transformation, which allows in principle an infinite variety of lattices with exact percolation thresholds to be generated. We directly verify Scullard’s site percolation thresholds, and derive the bond thresholds for his “martini” lattice (pc=1?2) and the “A” lattice (pc=0.625457…, solution to p5?4p4+3p3+2p2?1=0). We also present a precise Monte Carlo test of the site threshold for the “A” lattice.

Robert M. Ziff

2006-01-27T23:59:59.000Z

384

The Chern-Simons term in a dual Josephson junction  

E-Print Network (OSTI)

A dual Josephson junction corresponding to a (2+1)-dimensional non-superconducting layer sandwiched between two (3+1)-dimensional dual superconducting regions constitutes a model of localization of a U(1) gauge field within the layer. Monopole tunneling currents flow from one dual superconducting region to another due to a phase difference between the wave functions of the monopole condensate below and above the non-superconducting layer. These magnetic currents appear within the (2+1)-dimensional layer as a gas of magnetic instanton events and a weak electric charge confinement is expected to take place at very long distances within the layer. In the present work, we consider what happens when one introduces fermions in this physical scenario. Due to the dual Meissner effect featured in the dual superconducting bulk, it is argued that unconfined fermions would be localized within the (2+1)-dimensional layer, where their quantum fluctuations radiatively induce a Chern-Simons term, which is known to destroy th...

Grigorio, L S; Rougemont, R; Wotzasek, C; Zarro, C A D

2013-01-01T23:59:59.000Z

385

The Chern-Simons term in a dual Josephson junction  

E-Print Network (OSTI)

A dual Josephson junction corresponding to a (2+1)-dimensional non-superconducting layer sandwiched between two (3+1)-dimensional dual superconducting regions constitutes a model of localization of a U(1) gauge field within the layer. Monopole tunneling currents flow from one dual superconducting region to another due to a phase difference between the wave functions of the monopole condensate below and above the non-superconducting layer when there is an electromagnetic field within the layer. These magnetic currents appear within the (2+1)-dimensional layer as a gas of magnetic instanton events and a weak electric charge confinement is expected to take place at very long distances within the layer. In the present work, we consider what happens when one introduces fermions in this physical scenario. Due to the dual Meissner effect featured in the dual superconducting bulk, it is argued that unconfined fermions would be localized within the (2+1)-dimensional layer, where their quantum fluctuations radiatively induce a Chern-Simons term, which is known to destroy the electric charge confinement and to promote the confinement of the magnetic instantons.

L. S. Grigorio; M. S. Guimaraes; R. Rougemont; C. Wotzasek; C. A. D. Zarro

2013-08-27T23:59:59.000Z

386

Department of Industrial Engineering Spring 2014 Estimating Tool for Single-Piece Impeller Milling  

E-Print Network (OSTI)

component of centrifugal compressors. Currently, there is no system in place to estimate the cycle time

Demirel, Melik C.

387

Measurement of the ?-ray energy resolution function of EJ301 liquid scintillator using a dual channel ADC  

Science Journals Connector (OSTI)

Abstract A comparison of three different methods for the energy calibration of liquid scintillators using ?-ray sources using only a delay unit and a dual channel ADC is presented. Single Compton edge measurements combined with MCNP simulations of the pulse height spectra are compared with the results obtained using Compton coincidence methods. Good agreement between the three methods is found. Measurements from the three different methods are then combined to provide the best estimate of the energy resolution function. The technique here presented could be easily used in laboratory courses as high performing \\{ADCs\\} become more common and affordable.

M. Cecconello; M. Donato; C. Marini-Bettolo; S. Conroy; S. Sangaroon; G. Ericsson

2014-01-01T23:59:59.000Z

388

An ECT/ERT dual-modality sensor for oil-water two-phase flow measurement  

SciTech Connect

This paper presents a new sensor for ECT/ERT dual-modality system which can simultaneously obtain the permittivity and conductivity of the materials in the pipeline. Quasi-static electromagnetic fields are produced by the inner electrodes array sensor of electrical capacitance tomography (ECT) system. The results of simulation show that the data of permittivity and conductivity can be simultaneously obtained from the same measurement electrode and the fusion of two kinds of data may improve the quality of the reconstructed images. For uniform oil-water mixtures, the performance of designed dual-modality sensor for measuring the various oil fractions has been tested on representative data and the results of experiments show that the designed sensor broadens the measurement range compared to single modality.

Wang, Pitao [School of Electronic Engineering and Automation, Tianjin University, 300072 and School of Electronic Engineering, University of Jinan (China); Wang, Huaxiang; Sun, Benyuan; Cui, Ziqiang [School of Electronic Engineering and Automation, Tianjin University, 300072 (China); Huang, Wenrui [HuaDian Heavy Industries Co. Ltd, Beijing, 100077 (China)

2014-04-11T23:59:59.000Z

389

Approval Process for Dual Compensation Waivers for Reemployed Annuitants  

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

10 10 MEMORANDUM FOR HUMAN RESOURCE DIRECTORS ~~~ - FROM: SARAH J. NILLA, DIRECTOR OFFICE 0 UMAN CAPITAL MANAGEMENT SUBJECT: POLICY MEMORANDUM # 11: APPROVAL PROCESS FOR DUAL COMPENSATION WAIVERS FOR REEMPLOYED ANNUITANTS Section 1122 of the National Defense Authorization Act for Fiscal Year 2010, Public Law 111-84 (Pub. L 111-84) allows the head of an agency to grant dual compensation (salary-offset) waivers to reemployed annuitants who work on a limited basis without reduction to their retirement annuity. This provision in the law expires October 27, 2014. Secretary Chu has delegated the authority to approve all dual compensation waiver requests to the Department's Chief Human Capital Officer (CHCO). This authority can be used to: a) Fulfill functions critical to the mission of the agency (or any subcomponent of

390

Using dual decomposition for solving problems involving data uncertainty |  

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

dual decomposition for solving problems involving data uncertainty dual decomposition for solving problems involving data uncertainty August 14, 2013 Tweet EmailPrint Many applications mdash; energy, routing, scheduling, and production planning, for example mdash; involve problems in which some or all of the data may not be known when decisions under uncertainty must be made. In such cases, approximations with stochastic mixed-integer programming models are often used. Two approaches have been suggested to address such problems: dual decomposition (DD) and branch-and-price (BP). Both approaches divide the problem into two or more subproblems, together with linear constraints that enforce agreement between solutions to the different problems through a series of iterations. Unfortunately, both approaches also suffer from lack

391

Building Energy Software Tools Directory: Energy Estimation Software with  

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

Energy Estimation Software with Carbon Footprint Calculation Energy Estimation Software with Carbon Footprint Calculation Energy Estimation Software with Carbon Footprint Calculation logo. Energy Estimation Software for Fan and Pumping Applications estimates energy savings achieved when using a variable frequency drive instead of conventional control methods for fan and pumping applications. The results can be viewed in graphical format and text format and the software has built-in functions to generate an energy estimation report especially designed for consultants. The energy estimator software is available in two editions: Single System Edition This edition allows users to estimate energy savings for a single fan or pump system and generate a multi-page report based on the estimated savings. Project Edition This edition allows users to estimate energy savings of a single fan or

392

Simulation and Validation of a Single Tank Heat Pump Assisted Solar Domestic Water Heating System.  

E-Print Network (OSTI)

??This thesis is a study of an indirect heat pump assisted solar domestic hot water (I-HPASDHW) system, where the investigated configuration is called the Dual… (more)

Wagar, William Robert

2013-01-01T23:59:59.000Z

393

This paper presents a neural network based technique for the solution of a water system state estimation problem.The technique  

E-Print Network (OSTI)

ABSTRACT This paper presents a neural network based technique for the solution of a water system applied to a realistic 34-node water network. By changing the values of neural network parameters both with respect to their sensitivity to measurement errors. INTRODUCTION Efficient control of a complex water

Bargiela, Andrzej

394

MODELING OF PLANE-WAVE INCIDENCE ON A TWISTED-WIRE PAIR BUNDLE FOR RF INGRESS ESTIMATION IN DIGITAL SUBSCRIBER LINE SYSTEMS  

E-Print Network (OSTI)

is electromagnetic interference (EMI) caused by external radio sources that operate in the same frequency band) system consisting of a bundle of twisted-wire pairs (TWPs) in the presence of electromagnetic interference (EMI) is presented. The objective of such a model is to analyze the susceptibility of TWP bundles

395

Dual purpose solar collectors. Final technical report  

SciTech Connect

Use of a single energy solar collecting system for two purposes is described. First, during the summer, the system was installed at a community swimming pool to reduce cost of maintaining water temperature, and second, during the winter the system was moved to and installed in the city maintenance building to reduce heating costs. Data collected and analyzed about use of renewable energy sources were disseminated to communities of similar size to encourage like use of energy conservation practices.

Not Available

1980-01-01T23:59:59.000Z

396

Study of a dual frequency atmospheric pressure corona plasma  

Science Journals Connector (OSTI)

Radio frequency mixing of 2 and 13.56 MHz was investigated by performing experimental measurements on the atmospheric pressurecoronaplasma. As a result of the dual frequency length current density and electron excitation temperature of the plasma were increased while the gas temperature was maintained at roughly the same level when compared to the respective single frequency plasmas. Moreover observation of time-resolvedimages revealed that the dual frequency plasma has a discharge mode of 2 MHz positive streamer 2 MHz negative glow and 13.56 MHz continuous glow.

Dan Bee Kim; S. Y. Moon; H. Jung; B. Gweon; Wonho Choe

2010-01-01T23:59:59.000Z

397

Dual radio frequency plasma source: Understanding via electrical asymmetry effect  

SciTech Connect

On the basis of the global model, the influences of driving voltage and frequency on electron heating in geometrically symmetrical dual capacitively coupled radio frequency plasma have been investigated. Consistent with the experimental and simulation results, non-monotonic behavior of dc self bias and plasma heating with increasing high frequency is observed. In addition to the local maxima of plasma parameters for the integer values of the ratio between the frequencies ({xi}), ourstudies also predict local maxima for odd integer values of 2{xi} as a consequence of the electrical asymmetry effect produced by dual frequency voltage sources.

Bora, B. [Departamento de Plasma Termonuclear, Comision Chilena de Energia Nuclear (CCHEN), Casilla 188-D, Santiago (Chile); Departamento de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Bhuyan, H.; Favre, M.; Wyndham, E. [Departamento de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Wong, C. S. [Plasma Technology Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2013-04-21T23:59:59.000Z

398

Study of a dual frequency atmospheric pressure corona plasma  

SciTech Connect

Radio frequency mixing of 2 and 13.56 MHz was investigated by performing experimental measurements on the atmospheric pressure corona plasma. As a result of the dual frequency, length, current density, and electron excitation temperature of the plasma were increased, while the gas temperature was maintained at roughly the same level when compared to the respective single frequency plasmas. Moreover, observation of time-resolved images revealed that the dual frequency plasma has a discharge mode of 2 MHz positive streamer, 2 MHz negative glow, and 13.56 MHz continuous glow.

Kim, Dan Bee; Moon, S. Y.; Jung, H.; Gweon, B.; Choe, Wonho [Department of Physics, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)

2010-05-15T23:59:59.000Z

399

Dual design resistor for high voltage conditioning and transmission lines  

DOE Patents (OSTI)

A dual resistor for eliminating the requirement for two different value resistors. The dual resistor includes a conditioning resistor at a high resistance value and a run resistor at a low resistance value. The run resistor can travel inside the conditioning resistor. The run resistor is capable of being advanced by a drive assembly until an electrical path is completed through the run resistor thereby shorting out the conditioning resistor and allowing the lower resistance run resistor to take over as the current carrier.

Siggins, Timothy Lynn (Newport News, VA); Murray, Charles W. (Hayes, VA); Walker, Richard L. (Norfolk, VA)

2007-01-23T23:59:59.000Z

400

Photo of the Week: The First Energy-Efficient Dual-Paned Windows...  

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

Photo of the Week: The First Energy-Efficient Dual-Paned Windows Photo of the Week: The First Energy-Efficient Dual-Paned Windows December 5, 2013 - 12:53pm Addthis Researchers at...

Note: This page contains sample records for the topic "dual system estimation" 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

E-Print Network 3.0 - alters dual-species biofilm Sample Search...  

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

for: alters dual-species biofilm Page: << < 1 2 3 4 5 > >> 1 APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 0099-22400004.00 0 Summary: in a Dual-Species Biofilm Exposed to Mixed...

402

Mass-Production Cost Estimation for Automotive Fuel Cell Systems - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

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

DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report Brian D. James (Primary Contact), Kevin Baum, Andrew B. Spisak, Whitney G. Colella Strategic Analysis, Inc. 4075 Wilson Blvd. Suite 200 Arlington VA 22203 Phone: (703) 778-7114 Email: bjames@sainc.com DOE Managers HQ: Jason Marcinkoski, Phone: (202) 586-7466 Email: Jason.Marcinkoski@ee.doe.gov GO: Gregory Kleen Phone: (720) 356-1672 Email: Gregory.Kleen@go.doe.gov Contract Number: DE-EE0005236 Project Start Date: September 30, 2011 Project End Date: September 30, 2016 Fiscal Year (FY) 2012 Objectives Update 2011 automotive fuel cell cost model to include * latest performance data and system design information. Examine costs of fuel cell systems (FCSs) for light-duty * vehicle and bus applications.

403

Doppler Effect removal based on instantaneous frequency estimation and time domain re-sampling for wayside acoustic defective bearing detector system  

Science Journals Connector (OSTI)

Abstract The phenomenon of Doppler Effect in the acoustic signal recorded by the wayside acoustic defective bearing detector (ADBD) leads to the difficulty for fault diagnosis of train bearings with a high moving speed, which is a barrier that would badly reduce the effectiveness of online defect detection. In order to improve the performance of condition monitoring of the bearings on a passing train with microphones amounted besides the railway, the elimination of the Doppler Effect should be solved firstly. An effective method for removing the Doppler Effect embedded in the source signal is presented in this paper. The Short Time Fourier Transform-Viterbi Algorithm (STFT-VA) is applied to obtain instantaneous frequency estimation of the distorted signal. According to the acoustic theory of Morse, the non-linear data fitting is then carried out to get the fitting instantaneous frequencies. The necessary parameters for time domain interpolation re-sampling, which is totally based on the kinematic analysis, are acquired from the fitting curve and the re-sampling sequence could be established in the time domain. As a result of the preceding steps, the fault diagnosis for the train bearings could be implemented with the restored signal. The effectiveness of this proposed method is verified by means of a simulation with three adjacent frequencies and an experiment with practical acoustic signals of train bearings with a crack on the outer race and the inner race. The results of the simulation and the experiment indicate that the proposed method has an excellent performance in removing Doppler Effect, and could be well employed to the condition monitoring and fault diagnosis of train bearings with a high moving speed.

Chao Wang; Fanrang Kong; Qingbo He; Fei Hu; Fang Liu

2014-01-01T23:59:59.000Z

404

Bioprinting cell-laden matrigel for radioprotection study of liver by pro-drug conversion in a dual-tissue microfluidic chip  

E-Print Network (OSTI)

-tissue microfluidic chip This article has been downloaded from IOPscience. Please scroll down to see the full text for radioprotection study of liver by pro-drug conversion in a dual-tissue microfluidic chip J E Snyder1, Q Hamid1, C of this paper is to introduce a novel cell printing and microfluidic system to serve as a portable ground model

Sun, Wei

405

Online Vehicle Detection For Estimating Traffic Status  

E-Print Network (OSTI)

We propose a traffic congestion estimation system based on unsupervised on-line learning algorithm. The system does not rely on background extraction or motion detection. It extracts local features inside detection regions of variable size which are drawn on lanes in advance. The extracted features are then clustered into two classes using K-means and Gaussian Mixture Models(GMM). A Bayes classifier is used to detect vehicles according to the previous cluster information which keeps updated whenever system is running by on-line EM algorithm. Experimental result shows that our system can be adapted to various traffic scenes for estimating traffic status.

Lai, Ranch Y Q

2011-01-01T23:59:59.000Z

406

Dual formulation of the utility maximization problem : the case of nonsmooth utility  

E-Print Network (OSTI)

, finitely valued on the whole real line, we study the dual formulation of the utility maximization problemDual formulation of the utility maximization problem : the case of nonsmooth utility B. Bouchard the dual formulation of the utility maximization problem in incomplete markets when the utility function

Touzi, Nizar

407

Laboratory Evaluation of a Dual Rapid Immunodiagnostic Test for HIV and Syphilis Infection  

Science Journals Connector (OSTI)

...Evaluation of a Dual Rapid Immunodiagnostic Test for HIV and Syphilis Infection Claire C...Angeles, Los Angeles CA, USA New dual tests for HIV and syphilis have been developed...performance of a dual rapid immunodiagnostic test for HIV and syphilis. Our evaluation showed...

Claire C. Bristow; Segundo R. Leon; Lourdes B. Ramos; Silver K. Vargas; Juan A. Flores; Kelika A. Konda; Carlos F. Caceres; Jeffrey D. Klausner

2014-11-05T23:59:59.000Z

408

Dual-Process Theory and Signal-Detection Theory of Recognition Memory John T. Wixted  

E-Print Network (OSTI)

-detection theory. A dual-process version of signal-detection theory implies that individual recognition decisions. One view--the dual-process theory of recognition memory--holds that recogni- tion decisions are basedDual-Process Theory and Signal-Detection Theory of Recognition Memory John T. Wixted University

Wixted, John T.

409

Dual-energy contrast-enhanced breast tomosynthesis: optimization of beam quality for dose and image quality  

Science Journals Connector (OSTI)

Dual-energy contrast-enhanced breast tomosynthesis is a promising technique to obtain three-dimensional functional information from the breast with high resolution and speed. To optimize this new method, this study searched for the beam quality that maximized image quality in terms of mass detection performance. A digital tomosynthesis system was modeled using a fast ray-tracing algorithm, which created simulated projection images by tracking photons through a voxelized anatomical breast phantom containing iodinated lesions. The single-energy images were combined into dual-energy images through a weighted log subtraction process. The weighting factor was optimized to minimize anatomical noise, while the dose distribution was chosen to minimize quantum noise. The dual-energy images were analyzed for the signal difference to noise ratio (SdNR) of iodinated masses. The fast ray-tracing explored 523?776 dual-energy combinations to identify which yields optimum mass SdNR. The ray-tracing results were verified using a Monte Carlo model for a breast tomosynthesis system with a selenium-based flat-panel detector. The projection images from our voxelized breast phantom were obtained at a constant total glandular dose. The projections were combined using weighted log subtraction and reconstructed using commercial reconstruction software. The lesion SdNR was measured in the central reconstructed slice. The SdNR performance varied markedly across the kVp and filtration space. Ray-tracing results indicated that the mass SdNR was maximized with a high-energy tungsten beam at 49 kVp with 92.5 µm of copper filtration and a low-energy tungsten beam at 49 kVp with 95 µm of tin filtration. This result was consistent with Monte Carlo findings. This mammographic technique led to a mass SdNR of 0.92 ± 0.03 in the projections and 3.68 ± 0.19 in the reconstructed slices. These values were markedly higher than those for non-optimized techniques. Our findings indicate that dual-energy breast tomosynthesis can be performed optimally at 49 kVp with alternative copper and tin filters, with reconstruction following weighted subtraction. The optimum technique provides best visibility of iodine against structured breast background in dual-energy contrast-enhanced breast tomosynthesis.

Ehsan Samei; Robert S Saunders Jr

2011-01-01T23:59:59.000Z

410

LM13700/LM13700A Dual Operational Transconductance Amplifiers with  

E-Print Network (OSTI)

LM13700/LM13700A Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers General Description The LM13700 series consists of two current controlled transconductance amplifiers of the amplifiers. The output buffers of the LM13700 differ from those of the LM13600 in that their input bias

Lanterman, Aaron

411

LM119/LM219/LM319 High Speed Dual Comparator  

E-Print Network (OSTI)

LM119/LM219/LM319 High Speed Dual Comparator General Description The LM119 series are precision higher gain and lower input currents than devices like the LM710. The uncommitted collector of the output stage makes the LM119 compatible with RTL, DTL and TTL as well as capable of driving lamps and relays

Lanterman, Aaron

412

Dual aperture dipole magnet with second harmonic component  

DOE Patents (OSTI)

An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

Praeg, W.F.

1983-08-31T23:59:59.000Z

413

A Knowledge Management Support Environment based on Dual Loop Model  

E-Print Network (OSTI)

A Knowledge Management Support Environment based on Dual Loop Model Mitsuru Ikeda, Yusuke Hayashi individuals and organizations be properly understood and support learning for knowledge inheritance, and encourage the creation, the spreading and inheriting of new knowledge. This paper presents an framework

Mizoguchi, Riichiro

414

Dual Polarized And Balanced Receivers At Millimeter And Submillimeter  

E-Print Network (OSTI)

is dedicated to my parents. #12;iv Acknowledgments First and foremost, I would like to express my heartiest, soccer, tennis, racket ball, and badminton. Finally, I thank my parents, my brother and sisters of strength and inspiration, and without whom I would have lost my way. #12;vi Dual Polarized and Balanced

Chattopadhyay, Goutam

415

Dual periodicities in the rotational modulation of Saturn narrowband emissions  

E-Print Network (OSTI)

Dual periodicities in the rotational modulation of Saturn narrowband emissions S.Y. Ye,1 D. A emissions is examined, restricting the spacecraft location to either the northern or the southern hemisphere of Saturn. It is found that in both hemispheres, the modulation period of 5 kHz narrowband emissions has two

Gurnett, Donald A.

416

EXPERIMENTAL RESULTS ON DUAL-UEGO ACTIVE CATALYST CONTROL  

E-Print Network (OSTI)

EXPERIMENTAL RESULTS ON DUAL-UEGO ACTIVE CATALYST CONTROL Giovanni Fiengo Jessy W. Grizzle ignition engine equipped with a three-way catalyst and pre- and post-catalyst oxygen sensors. The control hydrocarbons. Linear exhaust gas oxygen sensors are used to measure pre- and post-catalyst air-fuel ratio

Grizzle, Jessy W.

417

SMITH INVARIANTS AND DUAL GRADED GRAPHS ALEXANDER MILLER  

E-Print Network (OSTI)

SMITH INVARIANTS AND DUAL GRADED GRAPHS ALEXANDER MILLER Abstract. The aim of this paper the Smith invariants immediately, as the eigenvalues are completely understood [3, 15]. Furthermore, we. Background 1 1.1. Differential posets 1 1.2. Eigenvalues 3 1.3. Smith invariants 3 2. Conjecture for r

Weinberger, Hans

418

Petrov type I Condition and Dual Fluid Dynamics  

E-Print Network (OSTI)

Recently Lysov and Strominger [arXiv:1104.5502] showed that imposing Petrov type I condition on a $(p+1)$-dimensional timelike hypersurface embedded in a $(p+2)$-dimensional vacuum Einstein gravity reduces the degrees of freedom in the extrinsic curvature of the hypersurface to that of a fluid on the hypersurface, and that the leading-order Einstein constraint equations in terms of the mean curvature of the embedding give the incompressible Navier-Stokes equations of the dual fluid. In this paper we show that the non-relativistic fluid dual to vacuum Einstein gravity does not satisfy the Petrov type I condition at next order, unless additional constraint such as the irrotational condition is added. In addition, we show that this procedure can be inversed to derive the non-relativistic hydrodynamics with higher order corrections through imposing the Petrov type I condition, and that some second order transport coefficients can be extracted, but the dual "Petrov type I fluid" does not match the dual fluid constructed from the geometry of vacuum Einstein gravity in the non-relativistic limit. We discuss the procedure both on the finite cutoff surface via the non-relativistic hydrodynamic expansion and on the highly accelerated surface via the near horizon expansion.

Rong-Gen Cai; Li Li; Qing Yang; Yun-Long Zhang

2014-03-17T23:59:59.000Z

419

Compact Wideband Dual-Polarized Microstrip Patch Antenna  

E-Print Network (OSTI)

Compact Wideband Dual-Polarized Microstrip Patch Antenna K. Rambabu*, M. Alam, J. Bornemann and M for microstrip patch antennas. There are numerous methods to couple multiple resonances. Examples include coupled patches [1], patches with slots (e.g. U- and E-shaped) [2], [3], stacked patches [4], and patches

Bornemann, Jens

420

Geometric Structure of Two Self-dual Fields with Constraints  

E-Print Network (OSTI)

A two dimensional Poincar$\\acute{e}$-invariant self-dual field with constraints is studied in geometric way. We obtained its symplectic structure and conservative currents on space of solutions, which are also invariant under transformations of Poincar$\\acute{e}$ group.

Xurong Chen

2007-11-18T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Introduction Estimation paramtrique (exemples)  

E-Print Network (OSTI)

Introduction Estimation paramétrique (exemples) FARMAN : Laboratoire SATIE Jean-Pierre Barbot J.P. Barbot Séminaires FARMAN (Traitement du Signal) - 1/36 #12;Introduction Estimation paramétrique (exemples de paramètres de synchronisation (VDSL 2) J.P. Barbot Séminaires FARMAN (Traitement du Signal) - 2

422

Internal Dose Estimates from  

E-Print Network (OSTI)

Appendix H Internal Dose Estimates from Global Fallout H-1 #12;Radiation Dose to the Population. 263-MQ-008090 September 30, 2000 H-2 #12;Radiation Dose to the Population of the Continental United Site Part I. Estimates of Dose Lynn R. Anspaugh Lynn R. Anspaugh, Consulting Salt Lake City, UT Report

423

Estimating Specialty Costs  

Directives, Delegations, and Requirements

Specialty costs are those nonstandard, unusual costs that are not typically estimated. Costs for research and development (R&D) projects involving new technologies, costs associated with future regulations, and specialty equipment costs are examples of specialty costs. This chapter discusses those factors that are significant contributors to project specialty costs and methods of estimating costs for specialty projects.

1997-03-28T23:59:59.000Z

424

COMPARISON OF EXPERIMENTS TO CFD MODELS FOR MIXING USING DUAL OPPOSING JETS IN TANKS WITH AND WITHOUT INTERNAL OBSTRUCTIONS  

SciTech Connect

This paper documents testing methods, statistical data analysis, and a comparison of experimental results to CFD models for blending of fluids, which were blended using a single pump designed with dual opposing nozzles in an eight foot diameter tank. Overall, this research presents new findings in the field of mixing research. Specifically, blending processes were clearly shown to have random, chaotic effects, where possible causal factors such as turbulence, pump fluctuations, and eddies required future evaluation. CFD models were shown to provide reasonable estimates for the average blending times, but large variations -- or scatter -- occurred for blending times during similar tests. Using this experimental blending time data, the chaotic nature of blending was demonstrated and the variability of blending times with respect to average blending times were shown to increase with system complexity. Prior to this research, the variation in blending times caused discrepancies between CFD models and experiments. This research addressed this discrepancy, and determined statistical correction factors that can be applied to CFD models, and thereby quantified techniques to permit the application of CFD models to complex systems, such as blending. These blending time correction factors for CFD models are comparable to safety factors used in structural design, and compensate variability that cannot be theoretically calculated. To determine these correction factors, research was performed to investigate blending, using a pump with dual opposing jets which re-circulate fluids in the tank to promote blending when fluids are added to the tank. In all, eighty-five tests were performed both in a tank without internal obstructions and a tank with vertical obstructions similar to a tube bank in a heat exchanger. These obstructions provided scale models of vertical cooling coils below the liquid surface for a full scale, liquid radioactive waste storage tank. Also, different jet diameters and different horizontal orientations of the jets were investigated with respect to blending. Two types of blending tests were performed. The first set of eighty-one tests blended small quantities of tracer fluids into solution. Data from these tests were statistically evaluated to determine blending times for the addition of tracer solution to tanks, and blending times were successfully compared to Computational Fluid Dynamics (CFD) models. The second set of four tests blended bulk quantities of solutions of different density and viscosity. For example, in one test a quarter tank of water was added to a three quarters of a tank of a more viscous salt solution. In this case, the blending process was noted to significantly change due to stratification of fluids, and blending times increased substantially. However, CFD models for stratification and the variability of blending times for different density fluids was not pursued, and further research is recommended in the area of blending bulk quantities of fluids. All in all, testing showed that CFD models can be effectively applied if statistically validated through experimental testing, but in the absence of experimental validation CFD model scan be extremely misleading as a basis for design and operation decisions.

Leishear, R.; Poirier, M.; Lee, S.; Fowley, M.

2012-06-26T23:59:59.000Z

425

Development of dual technology roadmap (TRM) for open innovation: Structure and typology  

Science Journals Connector (OSTI)

Abstract Today, innovation is no longer viewed as taking place within a single firm – but opening up the innovation process is still not a simple task. In open innovation, the mechanisms of incorporating external resources into the development process need to be carefully managed. This paper suggests a dual technology roadmap (TRM) that considers both internal and external firms. First, we introduce the concept of a dual TRM that considers partner resources as well as internal resources. Second, we suggest the structure of a dual TRM that uses dual planning objects. Third, three types of dual TRM are suggested, with three case examples.

Youngjung Geum; Jiyoung Kim; Changho Son; Yongtae Park

2013-01-01T23:59:59.000Z

426

Oscillating Strings and Non-Abelian T-dual Klebanov-Witten Background  

E-Print Network (OSTI)

We study oscillating string solutions in the Klebanov-Witten and its non-Abelian T-dual background dualised along an SU(2) isometry. We find the string energy as the function of oscillation number and angular momentum. We show that for a particular set of T-dual co-ordinates both the background have equal string states. We also study the string states where the strings are expanding and contracting in the T-dual co-ordinate direction. We expect the presence of the superconformal field theory dual operators whose anomalous dimensions depend on T-dual co-ordinate.

Pradhan, Pabitra M

2014-01-01T23:59:59.000Z

427

Oscillating Strings and Non-Abelian T-dual Klebanov-Witten Background  

E-Print Network (OSTI)

We study oscillating string solutions in the Klebanov-Witten and its non-Abelian T-dual background dualised along an SU(2) isometry. We find the string energy as the function of oscillation number and angular momentum. We show that for a particular set of T-dual co-ordinates both the background have equal string states. We also study the string states where the strings are expanding and contracting in the T-dual co-ordinate direction. We expect the presence of the superconformal field theory dual operators whose anomalous dimensions depend on T-dual co-ordinate.

Pabitra M. Pradhan

2014-06-09T23:59:59.000Z

428

Table 1. Updated estimates of power plant capital and operating costs  

U.S. Energy Information Administration (EIA) Indexed Site

Updated estimates of power plant capital and operating costs" Updated estimates of power plant capital and operating costs" ,"Plant Characteristics",,,"Plant Costs (2012$)" ,"Nominal Capacity (MW)","Heat Rate (Btu/kWh)",,"Overnight Capital Cost ($/kW)","Fixed O&M Cost ($/kW-yr)","Variable O&M Cost ($/MWh)" ,,,,,,,"NEMS Input" " Coal" "Single Unit Advanced PC",650,8800,,3246,37.8,4.47,"N" "Dual Unit Advanced PC",1300,8800,,2934,31.18,4.47,"Y" "Single Unit Advanced PC with CCS",650,12000,,5227,80.53,9.51,"Y" "Dual Unit Advanced PC with CCS",1300,12000,,4724,66.43,9.51,"N" "Single Unit IGCC ",600,8700,,4400,62.25,7.22,"N"

429

Quality Guidline for Cost Estimation Methodology for NETL Assessments...  

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

Energy Technology Laboratory Office of Program Performance and Benefits 2 Power Plant Cost Estimation Methodology Quality Guidelines for Energy System Studies April 2011...

430

Cost Estimating Guide  

Directives, Delegations, and Requirements

This Guide provides uniform guidance and best practices that describe the methods and procedures that could be used in all programs and projects at DOE for preparing cost estimates. No cancellations.

2011-05-09T23:59:59.000Z

431

: Helmholtz machine estimation .  

E-Print Network (OSTI)

: Helmholtz machine density estimation . . : . . . (supervised learning) , (active learning) (query learning) [1, 3]. . (unsupervised learning), . , [5]. . Helmholtz machine , . Helmholtz machine : Helmholtz machine [2] . Helmholtz machine (generative network) (recognition network) . , , . Helmholtz machine (self

432

Dual-Remote Raman Technology for In-Situ Identification of Tank Waste - 13549  

SciTech Connect

A new Raman spectroscopic system for in-situ identification of the composition of solid nuclear tank waste is being developed by collaborative effort between Pacific Northwest National Laboratory (PNNL) and EIC Laboratories, Inc. The recent advancements in Raman technology allow probing the chemical composition of the tank waste without sample collection. In the newly tested configuration, the Raman probe is installed on the top of the tank riser and sends the incident laser beam to the bottom of the tank, 10 - 70 feet away. The returning light containing chemical information is collected by the Raman probe and is transmitted via fiber optic cable to the spectrometer located outside the tank farm area. This dual remote technology significantly expands currently limited options for the safe rapid in-situ identification of the solid tank waste needed for the retrieval decisions. The developed Raman system was extensively tested for acceptability prior to tank farm deployment. This testing included calibration of the system with respect of the distance between the Raman probe and the sample, incident laser beam angle, and presence of the optical interferences. The Raman system was successfully deployed on Tank C-111 at the US DOE Hanford site. As the result of this deployment, the composition of the hardpan at the bottom of C-111 tank was identified. Further development of the dual-remote Raman technology will provide a significant safety enhancement eliminating the potential of personnel radiation exposure associated with the grab sample collection and expands options of the rapid and cost-effective in-situ chemical analysis of the tank waste. (authors)

Bryan, Sam; Levitskaia, Tatiana; Lines, Amanda; Smith, Frannie; Josephson, Gary [Pacific Northwest National Laboratory, Richland WA, 99352 (United States)] [Pacific Northwest National Laboratory, Richland WA, 99352 (United States); Bello, Job [EIC, Inc., Norwood, MA 02062 (United States)] [EIC, Inc., Norwood, MA 02062 (United States)

2013-07-01T23:59:59.000Z

433

Dual-chamber plasma deposition of A-Si:H solar cells at high rates using disilane  

SciTech Connect

The use of a separated chamber deposition system for the fabrication of a-Si:H solar cells from disilane at high deposition rates results in a substantial improvement in short circuit current compared to that obtained from a single-chamber system. The spectral responses of cells fabricated in the dual-chamber mode are compared to those made in the single-chamber mode. The results are interpreted by assuming that the rate of removal of boron contaminants from the chamber is independent of deposition rate.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

434

The MIRD method of estimating absorbed dose  

SciTech Connect

The estimate of absorbed radiation dose from internal emitters provides the information required to assess the radiation risk associated with the administration of radiopharmaceuticals for medical applications. The MIRD (Medical Internal Radiation Dose) system of dose calculation provides a systematic approach to combining the biologic distribution data and clearance data of radiopharmaceuticals and the physical properties of radionuclides to obtain dose estimates. This tutorial presents a review of the MIRD schema, the derivation of the equations used to calculate absorbed dose, and shows how the MIRD schema can be applied to estimate dose from radiopharmaceuticals used in nuclear medicine.

Weber, D.A.

1991-01-01T23:59:59.000Z

435

A priori estimates for relativistic liquid bodies  

E-Print Network (OSTI)

We demonstrate that a sufficiently smooth solution of the relativistic Euler equations that represents a dynamical compact liquid body, when expressed in Lagrangian coordinates, determines a solution to a system of non-linear wave equations with acoustic boundary conditions. Using this wave formulation, we prove that these solutions satisfy energy estimates without loss of derivatives. Importantly, our wave formulation does not require the liquid to be irrotational, and the energy estimates do not rely on divergence and curl type estimates employed in previous works.

Oliynyk, Todd A

2015-01-01T23:59:59.000Z

436

Systematic Approach for Decommissioning Planning and Estimating  

SciTech Connect

Nuclear facility decommissioning, satisfactorily completed at the lowest cost, relies on a systematic approach to the planning, estimating, and documenting the work. High quality information is needed to properly perform the planning and estimating. A systematic approach to collecting and maintaining the needed information is recommended using a knowledgebase system for information management. A systematic approach is also recommended to develop the decommissioning plan, cost estimate and schedule. A probabilistic project cost and schedule risk analysis is included as part of the planning process. The entire effort is performed by a experienced team of decommissioning planners, cost estimators, schedulers, and facility knowledgeable owner representatives. The plant data, work plans, cost and schedule are entered into a knowledgebase. This systematic approach has been used successfully for decommissioning planning and cost estimating for a commercial nuclear power plant. Elements of this approach have been used for numerous cost estimates and estimate reviews. The plan and estimate in the knowledgebase should be a living document, updated periodically, to support decommissioning fund provisioning, with the plan ready for use when the need arises.

Dam, A. S.

2002-02-26T23:59:59.000Z

437

Combined Numerical-experimental Study of Dual Fuel Diesel Engine  

Science Journals Connector (OSTI)

Abstract In the present paper the authors discuss the effect of different fuel ratios on the performance and emission levels of a common rail diesel engine supplied with natural gas and diesel oil. Dual fuel operation is characterized by a diesel pilot injection to start combustion in an intake port premixed NG/air mixture. The combined numerical – experimental study of the dual fuel diesel engine that is carried out in this paper aims at the evaluation of the CFD potential to predict the main features of this particular engine operation. The experimental investigations represent a tool for validating such a potential and for highlighting, at the same time, the major problems that arise from the actual engine operation with different NG / diesel oil fuel ratios.

Carmelina Abagnale; Maria Cristina Cameretti; Luigi De Simio; Michele Gambino; Sabatino Iannaccone; Raffaele Tuccillo

2014-01-01T23:59:59.000Z

438

Plane-parallel waves as duals of the flat background  

E-Print Network (OSTI)

We give a classification of non-Abelian T-duals of the flat metric in D=4 dimensions with respect to the four-dimensional continuous subgroups of the Poincare group. After dualizing the flat background, we identify majority of dual models as conformal sigma models in plane-parallel wave backgrounds, most of them having torsion. We give their form in Brinkmann coordinates. We find, besides the plane-parallel waves, several diagonalizable curved metrics with nontrivial scalar curvature and torsion. Using the non-Abelian T-duality, we find general solution of the classical field equations for all the sigma models in terms of d'Alembert solutions of the wave equation.

Ladislav Hlavaty; Ivo Petr

2014-12-03T23:59:59.000Z

439

String Gas Shells, their Dual Radiation and Hedgehog Signature Control  

E-Print Network (OSTI)

We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations that stabilize the shell. A string hedgehog can be introduced also into the solution. For zero or small hedgehog strength the string gas shell is of a regular nature, while the dual radiation is of a spacelike nature. For higher hedgehog strengths however the radiation "materializes" and becomes timelike while the string gas shell becomes space like. The significance of these solutions for the quantum theory is discussed.

E. I. Guendelman

2009-03-12T23:59:59.000Z

440

Gravity Duals of Lifshitz-Like Fixed Points  

SciTech Connect

We find candidate macroscopic gravity duals for scale-invariant but non-Lorentz invariant fixed points, which do not have particle number as a conserved quantity. We compute two-point correlation functions which exhibit novel behavior relative to their AdS counterparts, and find holographic renormalization group flows to conformal field theories. Our theories are characterized by a dynamical critical exponent z, which governs the anisotropy between spatial and temporal scaling t {yields} {lambda}{sup z}t, x {yields} {lambda}x; we focus on the case with z = 2. Such theories describe multicritical points in certain magnetic materials and liquid crystals, and have been shown to arise at quantum critical points in toy models of the cuprate superconductors. This work can be considered a small step towards making useful dual descriptions of such critical points.

Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Liu, Xiao; /Perimeter Inst. Theor. Phys.; Mulligan, Michael; /Stanford U., Phys. Dept. /SLAC

2008-11-05T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Advanced regenerator testing in the Raytheon dual-use cryocoolerr  

SciTech Connect

Significant progress has been made on the Raytheon low cost space cryocooler called the Dual-Use Cryocooler (DUC). Most notably, the DUC has been integrated and tested with an advanced regenerator. The advanced regenerator is a drop-in replacement for stainless steel screens and has shown significant thermodynamic performance improvements. This paper will compare the performance of two different regenerators and explain the benefits of the advanced regenerator.

Schaefer, B. R.; Bellis, L.; Ellis, M. J.; Conrad, T. J. [Raytheon Space and Airborne Systems 2000 E. El Segundo Blvd., El Segundo, CA 90245 (United States)

2014-01-29T23:59:59.000Z

442

Self-Dual Maps and Symmetric Bistochastic Matrices  

E-Print Network (OSTI)

The H-unistochastic matrices are a special class of symmetric bistochastic matrices obtained by taking the square of the absolute value of each entry of a Hermitian unitary matrix. We examine the geometric relationship of the convex hull of the n by n H-unistochastic matrices relative to the larger convex set of n by n symmetric bistochastic matrices. We show that any line segment in the convex set of the n by n symmetric bistochastic matrices which passes through the centroid of this convex set must spend at least two-thirds of its length in the convex hull of the n by n H-unistochastic matrices when n is either three or four and we prove a partial result for higher n. A class of completely positive linear maps called the self-dual doubly stochastic maps is useful for studying this problem. Some results on self-dual doubly stochastic maps are given including a self-dual version of the Laudau-Streater theorem.

Corey O'Meara; Rajesh Pereira

2012-11-13T23:59:59.000Z

443

Performance and emissions of a dual fuel operated diesel engine  

Science Journals Connector (OSTI)

Vegetable oil and its esters (biodiesel) are the renewable alternative fuels that can be used as a substitute for diesel in the diesel engines. The vegetable oil fuelled diesel engine results in lower efficiency and higher smoke emission. Hence in this work, an attempt has been made to use inedible and under utilised mahua oil (MO) as a substitute for diesel by fumigating liquefied petroleum gas (LPG) along with the air. A single cylinder diesel engine was modified to work in dual fuel mode by suitable retrofitting. The MO was injected into the cylinder using a fuel pump and LPG was fumigated along with the air. In MO + LPG dual fuel mode, 9% increase in brake thermal efficiency and 35% reduction in smoke emission of the engine were observed as compared to the sole fuel mode with MO. Also, the engine performance characteristics in MO + LPG dual fuel mode are close to sole fuel mode with diesel. From this work, it is concluded that LPG can be fumigated along with the air to increase the performance of MO fuelled agricultural diesel engine.

N. Kapilan; R.P. Reddy

2012-01-01T23:59:59.000Z

444

Weekly Coal Production Estimation Methodology  

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

Weekly Coal Production Estimation Methodology Step 1 (Estimate total amount of weekly U.S. coal production) U.S. coal production for the current week is estimated using a ratio...

445

Estimating Energy Savings in Compressed Air Systems  

E-Print Network (OSTI)

draw of the compressor was measured over a 4.5 hour interval during production. Based on the rated full load amps from the compressor nameplate, the full-load power (FLP) was calculated to be 52 kW. The no-load power draw (NLP1) of the compressor... for this compressor in load/unload control was: During the first seven hours, the #4 compressor was run in modulation control and then was switched to run in load/unload control with auto shutoff during the second seven hours. Compressors #1, #2 and #3 remained...

Schmidt, C.; Kissock, J. K.

2004-01-01T23:59:59.000Z

446

REQUESTS FOR RETIREMENT ESTIMATE  

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

REQUEST FOR RETIREMENT ANNUITY ESTIMATE REQUEST FOR RETIREMENT ANNUITY ESTIMATE Instructions: Please read and answer the following questions thoroughly to include checking all applicable boxes. Unanswered questions may delay processing. Print and Fax back your request form to 202.586.6395 or drop request to GM-169. The request will be assigned to your servicing retirement specialist. They will confirm receipt of your request. SECTION A Request Submitted _____________________ ______________________ ________________________ _____________________ Name (last, first, middle) Last four SSN Date of Birth ___________________________ _________________________ __________________________ Organization Office Telephone Number Fax Number

447

New ultra-deepwater rig with dual rotaries will reduce costs  

SciTech Connect

The Discoverer Enterprise, a next generation, ultra-deepwater drill ship with a dual rotary system, will decrease drilling and completion costs by reducing bottom hole assembly (BHA) and tubular preparation time. Transocean Offshore received a contract from Amoco Corp. to build the ultra-deep floating rig and is scheduled to spud its first well in July 1998. It will generally work in water deeper than 6,000 ft. The rig design involves a new approach that addresses the overall well-construction process and equipment required to decrease significantly deepwater drilling time. The Discoverer is the first ultra-deepwater rig designed specifically for handling subsea completions and extended well tests. The paper discusses increased deepwater rig demand, rig construction costs, drillship design, well construction, development drilling, and cost justification.

Cole, J.C.; Herrmann, R.P.; Scott, R.J. [Transocean Offshore Inc., Houston, TX (United States); Shaughnessy, J.M. [Amoco Corp., Houston, TX (United States)

1997-05-26T23:59:59.000Z

448

Dual harmonic Kelvin probe force microscopy at the graphene–liquid interface  

SciTech Connect

Kelvin probe force microscopy (KPFM) is a powerful technique for the determination of the contact potential difference (CPD) between an atomic force microscope tip and a sample under ambient and vacuum conditions. However, for many energy storage and conversion systems, including graphene-based electrochemical capacitors, understanding electrochemical phenomena at the solid–liquid interface is paramount. Despite the vast potential to provide fundamental insight for energy storage materials at the nanoscale, KPFM has found limited applicability in liquid environments to date. Here, using dual harmonic (DH)-KPFM, we demonstrate CPD imaging of graphene in liquid. We find good agreement with measurements performed in air, highlighting the potential of DH-KPFM to probe electrochemistry at the graphene–liquid interface.

Collins, Liam; Rodriguez, Brian J., E-mail: brian.rodriguez@ucd.ie [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 (Ireland); Kilpatrick, Jason I.; Weber, Stefan A. L. [Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 (Ireland); Vlassiouk, Ivan V. [Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Tselev, Alexander; Jesse, Stephen; Kalinin, Sergei V. [Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2014-03-31T23:59:59.000Z

449

Solar Photo Catalytic Hydrogen Production from water using a dual bed photosystem  

SciTech Connect

A body of work was performed in which the feasibility of photocatalytically decomposing water into its constituent elements using a dual bed, or modular photosystem, under solar radiation was investigated. The system envisioned consists of two modules, each consisting of a shallow, flat, sealed container, in which microscopic photocatalytic particles are immobilized. The photocatalysts absorb light, generating free electrons and lattice vacancy holes, which are capable of performing reductive and oxidative chemistry, respectively. The photocatalysts would be chosen as to whether they specifically promote H{sub 2} or O{sub 2} evolution in their respective containers. An aqueous solution containing a redox mediator is pumped between the two chambers in order to transfer electron equivalents from one reaction to the other.

Florida Solar Energy Center

2003-03-30T23:59:59.000Z

450

NETL: Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic  

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

Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Project No.: DE-FE0000470 Arizona State University is developing a dual-phase, membrane-based separation device which will separate carbon dioxide (CO2) from typical water gas shift (WGS) mixture feeds and produce hydrogen, which can be introduced into the combustion turbines of integrated gasification combined cycle (IGCC) plants. The objectives of the project are experimental studies of the synthesis of a high-temperature, chemically and thermally stable and CO2 perm-selective dual-phase membrane and its use as a membrane reactor for WGS reaction to produce H2 and CO2 rich streams. Concept of ceramic-carbonate dual phase membranes for CO2 separation. Concept of ceramic-carbonate dual phase membranes for CO2 separation.

451

SPACE TECHNOLOGY Actual Estimate  

E-Print Network (OSTI)

SPACE TECHNOLOGY TECH-1 Actual Estimate Budget Authority (in $ millions) FY 2011 FY 2012 FY 2013 FY.7 247.0 Exploration Technology Development 144.6 189.9 202.0 215.5 215.7 214.5 216.5 Notional SPACE TECHNOLOGY OVERVIEW .............................. TECH- 2 SBIR AND STTR

452

NETL: Robust and Energy Efficient Dual-Stage Membrane-Based Process for  

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

Robust and Energy Efficient Dual-Stage Membrane-Based Process for Enhanced CO2 Capture Robust and Energy Efficient Dual-Stage Membrane-Based Process for Enhanced CO2 Capture Project No.: DE-FE0013064 Media and Process Technology, Inc is developing a "one-box process" that integrates the water-gas-shift (WGS) reaction in a membrane reactor (MR) with hydrogen recovery for CO2 capture in integrated gasification combined cycle (IGCC) power systems. The process utilizes previously developed hydrogen (H2)-selective carbon molecular sieve membranes (CMS) and novel palladium (Pd) and Pd-alloy membranes for efficient residual H2 recovery. The bench-scale system will operate with simulated syngas mixtures first, and then be evaluated with real syngas at the National Carbon Capture Center for performance and long-term operation stability. Coal-derived syngas, after quenching and particulate removal, will undergo tar and contaminant removal, carbon monoxide conversion via WGS with a sour shift catalyst, and H2 separation in a single step. The bulk of the H2 produced (with purity adequate for downstream power generation) will be recovered in the permeate stream of this novel WGS/MR. The retentate stream (containing the residual H2 and the bulk of CO2 produced), after undergoing a conventional cold gas clean up for the removal of tar and contaminants, will be sent for CO2 compression for storage or use. Through the CO2 compression train, the residual H2 will be further recovered with a highly selective-Pd alloy membrane. A high degree of H2 (and consequently CO2) recovery can be achieved with the two-step membrane process. The strengths of CMS and Pd membranes are fully utilized while their weaknesses are compensated-for by the synergy that is being created by this novel two-stage process.

453

Feasibility of the design of dual-lane ramp meters in Texas  

E-Print Network (OSTI)

Of Single- And Dual-Lane Ramp Meters . . . . . . . . . . . . . Microscopic Simulation Analysis Of Traffic Control And Operational Characteristics . 58 60 61 63 65 65 66 V STUDY RESULTS . . . 72 Gessner Street/Katy Freeway Single-Lane Ramp Meter... . . . . . . 108 APPENDIX A DUAL-LANE RAMP METER SURVEY AND MAILING LIST . . . . . . 112 APPENDIX B MAY 1997 QUEUE AND DEMAND VOLUME DATA FOR THE GESSNER STREET/KATY FREEWAY SINGLE-LANE RAMP . . . . 120 APPENDIX C PROPOSED GESSNER STREET/KATY FREEWAY DUAL...

Butorac, Marc Allen

2012-06-07T23:59:59.000Z

454

Development of Dual-Fuel Engine for Class 8 Applications | Department...  

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

Class 8 Applications Development of Dual-Fuel Engine for Class 8 Applications Highlights roadmap towards 55% brake thermal efficiency and progress to meet engine development goals...

455

Design and Analysis of a Mach 3 Dual Mode Scramjet Combustor.  

E-Print Network (OSTI)

??Low speed operation of a dual mode scramjet engine is important to the development of a two stage to orbit reusable launch vehicle. This study… (more)

Corbin, Christopher Ryan

2008-01-01T23:59:59.000Z

456

A SAFEGUARDED DUAL WEIGHTED RESIDUAL METHOD RICARDO H. NOCHETTO, ANDREAS VEESER, AND MARCO VERANI  

E-Print Network (OSTI)

A SAFEGUARDED DUAL WEIGHTED RESIDUAL METHOD RICARDO H. NOCHETTO, ANDREAS VEESER, AND MARCO VERANI safeguarded by additional asymptotically higher order a posteriori terms. In particular, the enhanced

Nochetto, Ricardo H.

457

A new warmstarting strategy for the primal-dual column generation ...  

E-Print Network (OSTI)

Jun 22, 2012 ... One of the main advantages of the proposed strategy is that it does not require extensive ... fundamentals of primal-dual methods. In Section 3 ...

2012-06-22T23:59:59.000Z

458

Quantification of liver iron content with CT—added value of dual-energy  

Science Journals Connector (OSTI)

To evaluate the value of dual-energy CT (DECT) with use of an ... decomposition algorithm for the quantification of liver iron content (LIC).

Michael A. Fischer; Caecilia S. Reiner; Dimitri Raptis; Olivio Donati…

2011-08-01T23:59:59.000Z

459

A new warmstarting strategy for the primal-dual column generation ...  

E-Print Network (OSTI)

Jun 24, 2012 ... Abstract: This paper presents a new warmstarting technique in the context of a primal-dual column generation method applied to solve a ...

Jacek Gondzio

2012-06-24T23:59:59.000Z

460

Use of Cost Estimating Relationships  

Directives, Delegations, and Requirements

Cost Estimating Relationships (CERs) are an important tool in an estimator's kit, and in many cases, they are the only tool. Thus, it is important to understand their limitations and characteristics. This chapter discusses considerations of which the estimator must be aware so the Cost Estimating Relationships can be properly used.

1997-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "dual system estimation" 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

Reinforcing flood–risk estimation  

Science Journals Connector (OSTI)

...publication of the Flood estimation handbook, studies of ood risk are now...especially for its neglect of the physics of catchment pro- cesses of...recommended in the Flood estimation handbook (Institute of Hydrology 1999...estimates. The Flood estimation handbook (Institute of Hydrology 1999...

2002-01-01T23:59:59.000Z

462

NPP Estimation for Grasslands  

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

NPP for Grasslands NPP for Grasslands Introduction The Oak Ridge DAAC Net Primary Production (NPP) Database includes field measurements from grassland study sites worldwide. The following brief review and discussion is intended to explain the complexity of NPP estimates derived from grassland measurements. There is no single answer to the question, "What is the productivity of the ecosystem at study site A?"; rather there may be range of estimates of NPP, depending upon what data were actually collected and how these data are processed. Although some of these methods for determining NPP for grasslands may be applicable to other vegetation types (e.g., semi-deserts, tundra, or some crops), methods for forests, in particular, are significantly different. Nevertheless, it should be possible to answer the question, "Is this modelled value of NPP reasonable for this ecosystem type at this location?"

463

Bulk viscosity of strongly coupled plasmas with holographic duals  

E-Print Network (OSTI)

We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in arXiv:0708.3459.

Steven S. Gubser; Silviu S. Pufu; Fabio D. Rocha

2008-06-02T23:59:59.000Z

464

Dual-phase ferritic martensitic steel for concrete reinforcement  

SciTech Connect

This paper will discuss the microstructural characteristics and the mechanical and corrosion properties of dual-phase ferritic martensitic (DFM) steel embedded in concrete. Previous research on DFM steel has shown that these steels can attain higher tensile strengths, higher energy absorption, more fatigue resistance, higher ductility, and superior corrosion resistance than conventional reinforcement. Currently, a research project investigating the mechanical and durability aspects of DFM bars embedded in small concrete samples is underway. The objective of this research is to determine mechanical characteristics and present preliminary findings on possible corrosion mechanisms of a 0.1C/2Si DFM steel embedded in concrete.

Trejo, D.; Monteiro, P.; Thomas, G. [Univ. of California, Berkeley, CA (United States)

1995-12-31T23:59:59.000Z

465

Non-linear parent action and dual gravity  

E-Print Network (OSTI)

We give a reformulation of non-linear Einstein gravity, which contains the dual graviton together with the ordinary metric and a shift gauge field. The metric does not enter through a `kinetic' Einstein-Hilbert term, but via topological couplings, and so the theory does not lead to a doubling of degrees of freedom. The field equations take the form of first-order duality relations. We analyze the gauge symmetries and comment on their meaning with regard to the E11 proposal.

Nicolas Boulanger; Olaf Hohm

2012-04-29T23:59:59.000Z

466

A Primal-Dual Proximal Algorithm for Sparse Template-Based Adaptive Filtering: Application to Seismic Multiple Removal  

E-Print Network (OSTI)

Unveiling meaningful geophysical information from seismic data requires to deal with both random and structured "noises". As their amplitude may be greater than signals of interest (primaries), additional prior information is especially important in performing efficient signal separation. We address here the problem of multiple reflections, caused by wave-field bouncing between layers. Since only approximate models of these phenomena are available, we propose a flexible framework for time-varying adaptive filtering of seismic signals, using sparse representations, based on inaccurate templates. We recast the joint estimation of adaptive filters and primaries in a new convex variational formulation. This approach allows us to incorporate plausible knowledge about noise statistics, data sparsity and slow filter variation in parsimony-promoting wavelet frames. The designed primal-dual algorithm solves a constrained minimization problem that alleviates standard regularization issues in finding hyperparameters. Th...

Pham, Mai Quyen; Chaux, Caroline; Pesquet, Jean-Christophe

2014-01-01T23:59:59.000Z

467

Spectroscopy of the methane {nu}{sub 3} band with an accurate midinfrared coherent dual-comb spectrometer  

SciTech Connect

We demonstrate a high-accuracy dual-comb spectrometer centered at 3.4 {mu}m. The amplitude and phase spectra of the P, Q, and partial R branches of the methane {nu}{sub 3} band are measured at 25 to 100 MHz point spacing with resolution under 10 kHz and a signal-to-noise ratio of up to 3500. A fit of the absorbance and phase spectra yields the center frequency of 132 rovibrational lines. The systematic uncertainty is estimated to be 300 kHz, which is 10{sup -3} of the Doppler width and a 10-fold improvement over Fourier transform spectroscopy. These data quantify the accuracy and resolution achievable with direct comb spectroscopy in the midinfrared.

Baumann, E.; Giorgetta, F. R.; Swann, W. C.; Zolot, A. M.; Coddington, I.; Newbury, N. R. [National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305 (United States)

2011-12-15T23:59:59.000Z

468

Sub-Second Parallel State Estimation  

SciTech Connect

This report describes the performance of Pacific Northwest National Laboratory (PNNL) sub-second parallel state estimation (PSE) tool using the utility data from the Bonneville Power Administrative (BPA) and discusses the benefits of the fast computational speed for power system applications. The test data were provided by BPA. They are two-days’ worth of hourly snapshots that include power system data and measurement sets in a commercial tool format. These data are extracted out from the commercial tool box and fed into the PSE tool. With the help of advanced solvers, the PSE tool is able to solve each BPA hourly state estimation problem within one second, which is more than 10 times faster than today’s commercial tool. This improved computational performance can help increase the reliability value of state estimation in many aspects: (1) the shorter the time required for execution of state estimation, the more time remains for operators to take appropriate actions, and/or to apply automatic or manual corrective control actions. This increases the chances of arresting or mitigating the impact of cascading failures; (2) the SE can be executed multiple times within time allowance. Therefore, the robustness of SE can be enhanced by repeating the execution of the SE with adaptive adjustments, including removing bad data and/or adjusting different initial conditions to compute a better estimate within the same time as a traditional state estimator’s single estimate. There are other benefits with the sub-second SE, such as that the PSE results can potentially be used in local and/or wide-area automatic corrective control actions that are currently dependent on raw measurements to minimize the impact of bad measurements, and provides opportunities to enhance the power grid reliability and efficiency. PSE also can enable other advanced tools that rely on SE outputs and could be used to further improve operators’ actions and automated controls to mitigate effects of severe events on the grid. The power grid continues to grow and the number of measurements is increasing at an accelerated rate due to the variety of smart grid devices being introduced. A parallel state estimation implementation will have better performance than traditional, sequential state estimation by utilizing the power of high performance computing (HPC). This increased performance positions parallel state estimators as valuable tools for operating the increasingly more complex power grid.

Chen, Yousu; Rice, Mark J.; Glaesemann, Kurt R.; Wang, Shaobu; Huang, Zhenyu

2014-10-31T23:59:59.000Z

469

Preprint # 1010 Bayesian Methods for Estimating the  

E-Print Network (OSTI)

a bottom-up approach for approximating the pos- terior distribution of reliability of series and parallelPreprint # 10­10 Bayesian Methods for Estimating the Reliability of Complex Systems Using Ames, Iowa, 50011 August 8, 2010 ABSTRACT We propose a Bayesian approach for assessing the reliability

470

CHARACTERIZATION OF A SAMPLE OF INTERMEDIATE-TYPE AGNs. I. SPECTROSCOPIC PROPERTIES AND SERENDIPITOUS DISCOVERY OF NEW DUAL AGNs  

SciTech Connect

A sample of 10 nearby intermediate-type active galactic nuclei (AGNs) drawn from the Sloan Digital Sky Survey is presented. The aim of this work is to provide estimations of the black hole (BH) mass for the sample galaxies from the dynamics of the broad-line region. For this purpose, a detailed spectroscopic analysis of the objects was done. Using Baldwin-Phillips-Terlevich diagnostic diagrams, we have carefully classified the objects as true intermediate-type AGNs and found that 80%{sup +7.2%} {sub -17.3%} are composite AGNs. The BH mass estimated for the sample is within 6.54 {+-} 0.16 < log M {sub BH} < 7.81 {+-} 0.14. Profile analysis shows that five objects (J120655.63+501737.1, J121607.08+504930.0, J141238.14+391836.5, J143031.18+524225.8, and J162952.88+242638.3) have narrow double-peaked emission lines in both the red (H{alpha}, [N II] {lambda}{lambda}6548,6583 and [S II] {lambda}{lambda}6716, 6731) and the blue (H{beta} and [O III] {lambda}{lambda}4959, 5007) regions of the spectra, with velocity differences ({Delta}V) between the double peaks within 114 km s{sup -1} < {Delta}V < 256 km s{sup -1}. Two of them, J121607.08+504930.0 and J141238.14+391836.5, are candidates for dual AGNs since their double-peaked emission lines are dominated by AGN activity. In searches of dual AGNs, type 1, type II, and intermediate-type AGNs should be carefully separated, due to the high serendipitous number of narrow double-peaked sources (50% {+-} 14.4%) found in our sample.

Benitez, Erika; Cruz-Gonzalez, Irene; Martinez, Benoni; Jimenez-Bailon, Elena [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-264, Mexico D.F. 04510 (Mexico)] [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-264, Mexico D.F. 04510 (Mexico); Mendez-Abreu, Jairo; Lopez-Martin, Luis [Instituto de Astrofisica de Canarias, E-38200 La Laguna, Tenerife (Spain)] [Instituto de Astrofisica de Canarias, E-38200 La Laguna, Tenerife (Spain); Fuentes-Carrera, Isaura [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional (ESFM-IPN), U.P. Adolfo Lopez Mateos, Mexico D.F. 07730 (Mexico)] [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional (ESFM-IPN), U.P. Adolfo Lopez Mateos, Mexico D.F. 07730 (Mexico); Leon-Tavares, Jonathan [Aalto University Metsaehovi Radio Observatory, Metsaehovintie 114, FI-02540, Kylmaelae (Finland)] [Aalto University Metsaehovi Radio Observatory, Metsaehovintie 114, FI-02540, Kylmaelae (Finland); Chavushyan, Vahram H., E-mail: erika@astro.unam.mx [Instituto Nacional de Astrofisica, Optica y Electronica, Apdo. Postal 51-216, 72000 Puebla (Mexico)

2013-01-20T23:59:59.000Z

471

An expert system advisor for well log quality control  

E-Print Network (OSTI)

Taxonomy for the Sonic Iog C2 Taxonomy for the Gamma Ray lcg C3 Taxonomy for the Dual Induction Iog . Dl Gamma Ray Inf~ Trees . D2 Gamma Ray Inference Trees (Cont. ) D 3 Gamma Ray Inference Trees (Cont. ) D4 Dual Induction Inference Trees D5 Dual... FOR WELL IOG QUALITY CONTROL 17 OB3ECZIVFK SYSTEM DEVEIOFKENT 17 19 SUMMARY DISCUSSION SUGGESTIONS FOR FVHBK RESEARCH 31 33 41 APPENDIX A ? GIOSSARY OF ~ SYSTEM TERMINOIOGY . . 44 APPENDIX B ? AN ~ CONSULTATION SESSION WITH THE SONIC IOG...

Warnken, Dean Kennedy

2012-06-07T23:59:59.000Z

472

A DUAL-BAND MILLIMETER-WAVE KINETIC INDUCTANCE CAMERA FOR THE IRAM 30 m TELESCOPE  

SciTech Connect

The Neel IRAM KIDs Array (NIKA) is a fully integrated measurement system based on kinetic inductance detectors (KIDs) currently being developed for millimeter wave astronomy. The instrument includes dual-band optics allowing simultaneous imaging at 150 GHz and 220 GHz. The imaging sensors consist of two spatially separated arrays of KIDs. The first array, mounted on the 150 GHz branch, is composed of 144 lumped-element KIDs. The second array (220 GHz) consists of 256 antenna-coupled KIDs. Each of the arrays is sensitive to a single polarization; the band splitting is achieved by using a grid polarizer. The optics and sensors are mounted in a custom dilution cryostat, with an operating temperature of {approx}70 mK. Electronic readout is realized using frequency multiplexing and a transmission line geometry consisting of a coaxial cable connected in series with the sensor array and a low-noise 4 K amplifier. The dual-band NIKA was successfully tested in 2010 October at the Institute for Millimetric Radio Astronomy (IRAM) 30 m telescope at Pico Veleta, Spain, performing in-line with laboratory predictions. An optical NEP was then calculated to be around 2 x 10{sup -16} W Hz{sup -1/2} (at 1 Hz) while under a background loading of approximately 4 pW pixel{sup -1}. This improvement in comparison with a preliminary run (2009) verifies that NIKA is approaching the target sensitivity for photon-noise limited ground-based detectors. Taking advantage of the larger arrays and increased sensitivity, a number of scientifically relevant faint and extended objects were then imaged including the Galactic Center SgrB2 (FIR1), the radio galaxy Cygnus A, and the NGC1068 Seyfert galaxy. These targets were all observed simultaneously in the 150 GHz and 220 GHz atmospheric windows.

Monfardini, A.; Benoit, A.; Bideaud, A.; Swenson, L.; Cruciani, A.; Camus, P.; Hoffmann, C. [Institut Neel, CNRS and Universite Joseph Fourier (UJF), Grenoble F-38042 (France); Desert, F. X. [Institut de Planetologie et d'Astrophysique, UJF and CNRS-INSU, Grenoble F-38041 (France); Doyle, S.; Ade, P.; Mauskopf, P.; Tucker, C. [Cardiff School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom); Roesch, M.; Leclercq, S.; Schuster, K. F. [Institut de RadioAstronomie Millimetrique (IRAM), Saint Martin d'Heres F-38406 (France); Endo, A. [Kavli Institute of NanoScience, Delft University of Technology, 2628 CJ Delft (Netherlands); Baryshev, A.; Baselmans, J. J. A.; Ferrari, L.; Yates, S. J. C, E-mail: monfardini@grenoble.cnrs.fr [SRON, Netherlands Institute for Space Research, 3584 CA Utrecht and 9700 AV Groningen (Netherlands)

2011-06-01T23:59:59.000Z

473

Cost estimate of electricity produced by TPV  

Science Journals Connector (OSTI)

A crucial parameter for the market penetration of TPV is its electricity production cost. In this work a detailed cost estimate is performed for a Si photocell based TPV system, which was developed for electrically self-powered operation of a domestic heating system. The results are compared to a rough estimate of cost of electricity for a projected GaSb based system. For the calculation of the price of electricity, a lifetime of 20 years, an interest rate of 4.25% per year and maintenance costs of 1% of the investment are presumed. To determine the production cost of TPV systems with a power of 12–20 kW, the costs of the TPV components and 100 EUR kW?1el,peak for assembly and miscellaneous were estimated. Alternatively, the system cost for the GaSb system was derived from the cost of the photocells and from the assumption that they account for 35% of the total system cost. The calculation was done for four different TPV scenarios which include a Si based prototype system with existing technology (?sys = 1.0%), leading to 3000 EUR kW?1el,peak, an optimized Si based system using conventional, available technology (?sys = 1.5%), leading to 900 EUR kW?1el,peak, a further improved system with future technology (?sys = 5%), leading to 340 EUR kW?1el,peak and a GaSb based system (?sys = 12.3% with recuperator), leading to 1900 EUR kW?1el,peak. Thus, prices of electricity from 6 to 25 EURcents kWh?1el (including gas of about 3.5 EURcents kWh?1) were calculated and compared with those of fuel cells (31 EURcents kWh?1) and gas engines (23 EURcents kWh?1).

Günther Palfinger; Bernd Bitnar; Wilhelm Durisch; Jean-Claude Mayor; Detlev Grützmacher; Jens Gobrecht

2003-01-01T23:59:59.000Z

474

Vertical Structure of Convective Systems during NAME 2004  

Science Journals Connector (OSTI)

This study describes the vertical structure of mesoscale convective systems (MCSs) that characterized the 2004 North American monsoon utilizing observations from a 2875-MHz (S band) profiler and a dual-polarimetric scanning Doppler radar. Both ...

David G. Lerach; Steven A. Rutledge; Christopher R. Williams; Robert Cifelli

2010-05-01T23:59:59.000Z

475

Dual Phase Membrane for High Temperature CO2 Separation  

SciTech Connect

This project aimed at synthesis of a new inorganic dual-phase carbonate membrane for high temperature CO{sub 2} separation. Metal-carbonate dual-phase membranes were prepared by the direct infiltration method and the synthesis conditions were optimized. Permeation tests for CO{sub 2} and N{sub 2} from 450-750 C showed very low permeances of those two gases through the dual-phase membrane, which was expected due to the lack of ionization of those two particular gases. Permeance of the CO{sub 2} and O{sub 2} mixture was much higher, indicating that the gases do form an ionic species, CO{sub 3}{sup 2-}, enhancing transport through the membrane. However, at temperatures in excess of 650 C, the permeance of CO{sub 3}{sup 2-} decreased rapidly, while predictions showed that permeance should have continued to increase with temperature. XRD data obtained from used membrane indicated that lithium iron oxides formed on the support surface. This lithium iron oxide layer has a very low conductivity, which drastically reduces the flow of electrons to the CO{sub 2}/O{sub 2} gas mixture; thus limiting the formation of the ionic species required for transport through the membrane. These results indicated that the use of stainless steel supports in a high temperature oxidative environment can lead to decreased performance of the membranes. This revelation created the need for an oxidation resistant support, which could be gained by the use of a ceramic-type membrane. Work was extended to synthesize a new inorganic dual-phase carbonate membrane for high temperature CO{sub 2} separation. Helium permeance of the support before and after infiltration of molten carbonate are on the order of 10{sup -6} and 10{sup -10} moles/m{sup 2} {center_dot} Pa {center_dot} s respectively, indicating that the molten carbonate is able to sufficiently infiltrate the membrane. It was found that La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}} (LSCF) was a suitable candidate for the support material. This support material proved to separate CO{sub 2} when combined with O{sub 2} at a flux of 0.194 ml/min {center_dot} cm{sup 2} at 850 C. It was also observed that, because LSCF is a mixed conductor (conductor of both electrons and oxygen ions), the support was able to provide its own oxygen to facilitate separation of CO{sub 2}. Without feeding O{sub 2}, the LSCF dual phase membrane produced a maximum CO{sub 2} flux of 0.246 ml/min {center_dot} cm{sup 2} at 900 C.

Jerry Lin

2007-06-30T23:59:59.000Z

476

Development of Dual-Electrode Amperometric Detectors for Liquid Chromatography and Capillary Electrophoresis  

E-Print Network (OSTI)

be operated in either a redox cycling mode or dual–potential mode, where either chemical reversibility or voltammetry could be used as a means to confirm migration based peak identification, respectively. The same design was then applied for a dual Au/Hg...

Dorris, Megan

2013-05-31T23:59:59.000Z

477

Comprehensive computational model of single-and dual-loop optoelectronic  

E-Print Network (OSTI)

Comprehensive computational model of single- and dual-loop optoelectronic oscillators describe a comprehensive computational model for single- loop and dual-loop optoelectronic oscillators amplifiers and oscillators; (230.0250) Optoelectronics; (230.4910) Oscillators. References and links 1. X. S

Horowitz, Moshe

478

Laboratory Evaluation of Three Rapid Diagnostic Tests for Dual Detection of HIV and Treponema pallidum Antibodies  

Science Journals Connector (OSTI)

...Laboratory Evaluation of Three Rapid Diagnostic Tests for Dual Detection of HIV and Treponema...dual HIV and syphilis rapid diagnostic tests (RDTs) was evaluated for 150 patient...FDA-approved HIV-1 RNA nucleic acid test (NAT) (11). Reference methods for...

Romney M. Humphries; Jennifer S. Woo; Jun Ho Chung; Anita Sokovic; Claire C. Bristow; Jeffrey D. Klausner

2014-10-08T23:59:59.000Z

479

The piston dynamics under knock situation of diesel dual fuel engine: a numerical study  

Science Journals Connector (OSTI)

A compression ignition engine fueled by natural gas or Diesel Dual Fuel (DDF) engine is a promising engine for the future of a high oil price. Unfortunately, the DDF engine knocks easily: this leads to damage of pistons. So, the understanding of the ... Keywords: diesel dual fuel engine, knock, mixed-lubrication, modelling, piston secondary motion, simulation

Krisada Wannatong; Somchai Chanchaona; Surachai Sanitjai

2007-01-01T23:59:59.000Z

480

Ordered Arrays of Dual-Diameter Nanopillars for Maximized Optical Absorption  

E-Print Network (OSTI)

Ordered Arrays of Dual-Diameter Nanopillars for Maximized Optical Absorption Zhiyong Fan,,,§ Rehan control to achieve the optimal absorption efficiency. Increasing the Ge materials filling ratio is shown a strong diameter dependency. To enhance the broad band optical absorption efficiency, a novel dual

Javey, Ali

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481

USE OF MOVING AVERAGES AND INTERPOLATION TO ESTIMATE MEDIAN-EFFECTIVE DOSE: I. Fundamental Formulas, Estimation of Error, and Relation to Other Methods  

Science Journals Connector (OSTI)

...median-effective dose; fundamental formulas, estimation of error, and...median-effective dose, in cases of a...150-154. 144 ESTIMATION OF MEDL4N-EFFECTIVE DOSE 31. EJUSSEY...The effects of radiations on biological systems...

William R. Thompson

1947-06-01T23:59:59.000Z

482

Prediction of a Flash Flood in Complex Terrain. Part I: A Comparison of Rainfall Estimates from Radar, and Very Short Range Rainfall Simulations from a Dynamic Model and an Automated Algorithmic System  

Science Journals Connector (OSTI)

Operational prediction of flash floods caused by convective rainfall in mountainous areas requires accurate estimates or predictions of the rainfall distribution in space and time. The details of the spatial distribution are especially critical ...

Thomas T. Warner; Edward A. Brandes; Juanzhen Sun; David N. Yates; Cynthia K. Mueller

2000-06-01T23:59:59.000Z

483

Implementation of dual-energy technique for virtual monochromatic and linearly mixed CBCTs  

SciTech Connect

Purpose: To implement dual-energy imaging technique for virtual monochromatic (VM) and linearly mixed (LM) cone beam CTs (CBCTs) and to demonstrate their potential applications in metal artifact reduction and contrast enhancement in image-guided radiation therapy (IGRT). Methods: A bench-top CBCT system was used to acquire 80 kVp and 150 kVp projections, with an additional 0.8 mm tin filtration. To implement the VM technique, these projections were first decomposed into acrylic and aluminum basis material projections to synthesize VM projections, which were then used to reconstruct VM CBCTs. The effect of VM CBCT on the metal artifact reduction was evaluated with an in-house titanium-BB phantom. The optimal VM energy to maximize contrast-to-noise ratio (CNR) for iodine contrast and minimize beam hardening in VM CBCT was determined using a water phantom containing two iodine concentrations. The LM technique was implemented by linearly combining the low-energy (80 kVp) and high-energy (150 kVp) CBCTs. The dose partitioning between low-energy and high-energy CBCTs was varied (20%, 40%, 60%, and 80% for low-energy) while keeping total dose approximately equal to single-energy CBCTs, measured using an ion chamber. Noise levels and CNRs for four tissue types were investigated for dual-energy LM CBCTs in comparison with single-energy CBCTs at 80, 100, 125, and 150 kVp. Results: The VM technique showed substantial reduction of metal artifacts at 100 keV with a 40% reduction in the background standard deviation compared to a 125 kVp single-energy scan of equal dose. The VM energy to maximize CNR for both iodine concentrations and minimize beam hardening in the metal-free object was 50 keV and 60 keV, respectively. The difference of average noise levels measured in the phantom background was 1.2% between dual-energy LM CBCTs and equivalent-dose single-energy CBCTs. CNR values in the LM CBCTs of any dose partitioning are better than those of 150 kVp single-energy CBCTs. The average CNR for four tissue types with 80% dose fraction at low-energy showed 9.0% and 4.1% improvement relative to 100 kVp and 125 kVp single-energy CBCTs, respectively. CNRs for low-contrast objects improved as dose partitioning was more heavily weighted toward low-energy (80 kVp) for LM CBCTs. Conclusions: Dual-energy CBCT imaging techniques were implemented to synthesize VM CBCT and LM CBCTs. VM CBCT was effective at achieving metal artifact reduction. Depending on the dose-partitioning scheme, LM CBCT demonstrated the potential to improve CNR for low contrast objects compared to single-energy CBCT acquired with equivalent dose.

Li Hao; Giles, William; Ren Lei; Bowsher, James; Yin Fangfang [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27710 (United States); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 (United States)

2012-10-15T23:59:59.000Z

484

Estimating Renewable Energy Costs | Department of Energy  

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

Estimating Renewable Energy Costs Estimating Renewable Energy Costs Estimating Renewable Energy Costs October 16, 2013 - 4:40pm Addthis Some renewable energy measures, such as daylighting, passive solar heating, and cooling load avoidance, do not add much to the cost of a building. However, renewable energy technologies typically require large, additional capital investments with savings accruing over the project's life. It is crucial that these systems are considered early on in the budgeting process. Early budget requests need to include a set of technologies that could be used to meet the project's design requirements and their associated implementation costs. The design team may respond with a different set of feasible technologies, but it is wise to have an existing placeholder in the budget. Federal agencies can continue to update the budget as decisions

485

State energy data report 1996: Consumption estimates  

SciTech Connect

The State Energy Data Report (SEDR) provides annual time series estimates of State-level energy consumption by major economic sectors. The estimates are developed in the Combined State Energy Data System (CSEDS), which is maintained and operated by the Energy Information Administration (EIA). The goal in maintaining CSEDS is to create historical time series of energy consumption by State that are defined as consistently as possible over time and across sectors. CSEDS exists for two principal reasons: (1) to provide State energy consumption estimates to Members of Congress, Federal and State agencies, and the general public and (2) to provide the historical series necessary for EIA`s energy models. To the degree possible, energy consumption has been assigned to five sectors: residential, commercial, industrial, transportation, and electric utility sectors. Fuels covered are coal, natural gas, petroleum, nuclear electric power, hydroelectric power, biomass, and other, defined as electric power generated from geothermal, wind, photovoltaic, and solar thermal energy. 322 tabs.

NONE

1999-02-01T23:59:59.000Z

486

Augmenting Satellite Precipitation Estimation with Lightning Information  

SciTech Connect

We have used lightning information to augment the Precipitation Estimation from Remotely Sensed Imagery using an Artificial Neural Network - Cloud Classification System (PERSIANN-CCS). Co-located lightning data are used to segregate cloud patches, segmented from GOES-12 infrared data, into either electrified (EL) or non-electrified (NEL) patches. A set of features is extracted separately for the EL and NEL cloud patches. The features for the EL cloud patches include new features based on the lightning information. The cloud patches are classified and clustered using self-organizing maps (SOM). Then brightness temperature and rain rate (T-R) relationships are derived for the different clusters. Rain rates are estimated for the cloud patches based on their representative T-R relationship. The Equitable Threat Score (ETS) for daily precipitation estimates is improved by almost 12% for the winter season. In the summer, no significant improvements in ETS are noted.

Mahrooghy, Majid [Mississippi State University (MSU); Anantharaj, Valentine G [ORNL; Younan, Nicolas H. [Mississippi State University (MSU); Petersen, Walter A. [NASA Marshall Space Flight Center, Huntsville, AL; Hsu, Kuo-Lin [University of California, Irvine; Behrangi, Ali [Jet Propulsion Laboratory, Pasadena, CA; Aanstoos, James [Mississippi State University (MSU)

2013-01-01T23:59:59.000Z

487

Dual-Bed Gasification of Petcoke: Model Development and Validation  

Science Journals Connector (OSTI)

Dual-Bed Gasification of Petcoke: Model Development and Validation ... A series of sensitivity analyses is performed with regard to a conventional gasifier fed by petcoke, and the effects of residence time and oxygen/carbon mass ratio in the feed are investigated over three process variables: char conversion at the gasifier exit, temperature at the gasifier exit, and amount of useful syngas (H2 and CO) produced, in terms of N?m3 per ton of petcoke. ... Different from most literature publications, such as refs 5 and 6, where coal and/or petcoke gasification models are checked against available data, with respect to the syngas composition obtained, and to the process cold gas efficiency, one of the purposes of our paper is to correlate experimental data to a parameter that is important both for simulation and for reactor design: the value of the residence time of the gasifier. ...

Maria Sudiro; Carlos Zanella; Alberto Bertucco; Luigi Bressan; Marco Fontana

2010-01-15T23:59:59.000Z

488

Estimation of Parameters in Carbon Sequestration Models from Net Ecosystem  

E-Print Network (OSTI)

Estimation of Parameters in Carbon Sequestration Models from Net Ecosystem Exchange Data Luther in the context of a deterministic com- partmental carbon sequestration system. Sensitivity and approximation usefulness in the estimation of parameters within a compartmental carbon sequestration model. Previously we

White, Luther

489

Two Applications of Nonparametric Regression in Survey Estimation  

E-Print Network (OSTI)

) Nonparametric model-assisted estimator (b) Utah Forest Survey 4. Specific Inference for Survey Data (a (m) System asp aspect (deg) (GIS) slope slope (deg) hillshd hillshade (solar radiation) N = 67, 216 Moderate generic specific model-assisted model-based Small specific small domain estimation · "Number

490

Solar photocatalytic hydrogen production from water using a dual bed photosystem. Task 2 report; Annual report  

SciTech Connect

This work is an investigation into the use of photocatalytic particles in a dual bed configuration, so as to effect the solar-driven decomposition of water to its constituent elements, particularly hydrogen. The system envisioned would consist of two modules, each consisting of a shallow, flat, sealed container, in which micron-sized photocatalytic particles are immobilized. An aqueous solution containing a redox mediator is pumped between the two chambers. Different photoparticles and catalysts are chosen for their respective modules so as to effect oxidative water-splitting in one vessel to evolve oxygen gas, and reductive water-splitting in the other to evolve hydrogen. This is a direct photoconversion scheme that breaks down the energetic requirement for water decomposition into a 2-photon process, and enables separate production of hydrogen and oxygen. Titanium dioxide, TiO{sub 2}, and indium phosphide, InP, were employed as photoparticles in the O{sub 2}- and H{sub 2}-evolving beds, respectively. Platinum catalysts were evaluated to prompt H{sub 2}-evolution. Calculations on the energy band structure of free and immobilized particles provided guidance as to how the microstructure of the particles should be configured. A series of redox mediators, spanning a range of redox potentials, were tested. While many electron donors facilitated H{sub 2}-evolution, only the most oxidizing ones enabled O{sub 2}-evolution. A single redox couple, capable of charge exchange in both modules, is desirable to avoid system design complexity.

Linkous, C.A.; McKaige, G.T.; Slattery, D.K.; Ouellette, A.J.A.; Austin, B.C.N.

1995-12-01T23:59:59.000Z

491

Nonlinear filtering for narrow-band time delay estimation  

E-Print Network (OSTI)

This thesis presents a method for improving passive acoustic tracking. A large family of acoustic tracking systems combine estimates of the time difference of arrival (TDoA) between pairs of spatially separated sensors - ...

Tobenkin, Mark M

2009-01-01T23:59:59.000Z

492

3D pose estimation and segmentation using specular cues  

E-Print Network (OSTI)

We present a system for fast model-based segmentation and 3D pose estimation of specular objects using appearance based specular features. We use observed (a) specular reflection and (b) specular flow as cues, which are ...

Raskar, Ramesh

493

Lane estimation for autonomous vehicles using vision and LIDAR  

E-Print Network (OSTI)

Autonomous ground vehicles, or self-driving cars, require a high level of situational awareness in order to operate safely and eciently in real-world conditions. A system able to quickly and reliably estimate the location ...

Huang, Albert Shuyu

2010-01-01T23:59:59.000Z

494

INCREMENTAL LEARNING OF NDE SIGNALS WITH CONFIDENCE ESTIMATION  

E-Print Network (OSTI)

INCREMENTAL LEARNING OF NDE SIGNALS WITH CONFIDENCE ESTIMATION Robi Polikar Department evaluation (NDE) applications resort to pattern recognition and machine learning algorithms for automated classification and characterization of NDE signals. Applications of such systems include defect identification

Polikar, Robi

495

Applications of the Bayesian approach for experimentation and estimation  

E-Print Network (OSTI)

A Bayesian framework for systematic data collection and parameter estimation is proposed to aid experimentalists in effectively generating and interpreting data. The four stages of the Bayesian framework are: system ...

De Man, Patrick A. P. (Patrick Antonius Petrus)

2006-01-01T23:59:59.000Z

496

Production, Cost, and Soil Compaction Estimates for Two Western Juniper  

E-Print Network (OSTI)

Production, Cost, and Soil Compaction Estimates for Two Western Juniper Extraction Systems, production rates, and soil compaction impacts of two systems for harvesting western juniper (Juniperus, and bucking using a chainsaw and skidding logs with a rubber-tired grapple skidder and a mechanical system

Dodson, Beth

497

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models  

E-Print Network (OSTI)

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models of the inverters. Keywords-Photovoltaic energy conversion, Markov reliability models, utility-interactive inverters, energy yield estimation. I. INTRODUCTION Photovoltaic systems have gained prominence as economically

Liberzon, Daniel

498

Evaluation of the Dorado 5100 Storage System Hussein N. El-Harake and Colin McMurtrie  

E-Print Network (OSTI)

, namely via a GUI and via a command line interface (CLI). Both interfaces are complete and well documented. SYSTEM CONFIGURATION CSCS received a dual controller Dorado5100 with 8 dual SAS interfaces to connect, investigating reliability, manageability and integration of this solution in the CSCS environment. In this study

499

Prospectively ECG-triggered high-pitch coronary angiography with third-generation dual-source CT at 70 kVp tube voltage: Feasibility, image quality, radiation dose, and effect of iterative reconstruction  

Science Journals Connector (OSTI)

AbstractBackground Low tube voltage reduces radiation exposure in coronary CT angiography (CTA). Using 70 kVp tube potential has so far not been possible because CT systems were unable to provide sufficiently high tube current with low voltage. Objective We evaluated feasibility, image quality (IQ), and radiation dose of coronary CTA using a third-generation dual-source CT system capable of producing 450 mAs tube current at 70 kVp tube voltage. Methods Coronary CTA was performed in 26 consecutive patients with suspected coronary artery disease, selected for body weight pitch spiral acquisition was used. Filtered back projection (FBP) and iterative reconstruction (IR) algorithms were applied. IQ was assessed using a 4-point rating scale (1 = excellent, 4 = nondiagnostic) and objective parameters. Results Mean age was 62 ± 9 years (46% males; mean body mass index, 27.7 ± 3.8 kg/m2; mean heart rate, 54 ± 5 beats/min). Mean dose-length product was 20.6 ± 1.9 mGy × cm; mean estimated effective radiation dose was 0.3 ± 0.03 mSv. Diagnostic IQ was found in 365 of 367 (FBP) and 366 of 367 (IR) segments (P nonsignificant). IQ was rated “excellent” in 53% (FBP) and 86% (IR) segments (P = .001) and “nondiagnostic” in 2 (FBP) and 1 segment (IR) (P nonsignificant). Mean IQ score was lesser in FBP vs IR (1.5 ± 0.4 vs 1.1 ± 0.2; P pitch spiral acquisition and 70 kVp tube voltage is feasible and provides both robust IQ and very low radiation exposure.

Michaela M. Hell; Daniel Bittner; Annika Schuhbaeck; Gerd Muschiol; Michael Brand; Michael Lell; Michael Uder; Stephan Achenbach; Mohamed Marwan

2014-01-01T23:59:59.000Z

500

Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) |  

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

Preliminary Report on Dual-Purpose Canister Disposal Alternatives Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) This report documents the first phase of a multi-year project to understand the technical feasibility and logistical implications of direct disposal of spent nuclear fuel (SNF) in existing dual-purpose canisters (DPCs) and other types of storage casks. The first phase includes a set of preliminary disposal concepts and associated technical analyses, identification of additional R&D needs, and a recommendation to proceed with the next phase of the evaluation effort. Preliminary analyses indicate that DPC direct disposal could be technically feasible, at least for certain disposal concepts. DPC disposal concepts include the salt concept, and emplacement