Wagner, Richard William (Albion, NY); Burkhard, James Frank (Churchville, NY); Dauer, Kenneth John (Avon, NY)
1999-11-16T23:59:59.000Z
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.
Distributed Estimation via Dual Decomposition Sikandar Samar
Siemens Corporate Research Princeton, NJ 08540 sikandar.samar@siemens.com Stephen Boyd Information Systems
Systems Engineering Cost Estimation
Bryson, Joanna J.
on project, human capital impact. 7 How to estimate Cost? Difficult to know what we are building early on1 Systems Engineering Lecture 3 Cost Estimation Dr. Joanna Bryson Dr. Leon Watts University of Bath: Contrast approaches for estimating software project cost, and identify the main sources of cost
Dual liquid and gas chromatograph system
Gay, Don D. (Aiken, SC)
1985-01-01T23:59:59.000Z
A chromatographic system that utilizes one detection system for gas chromatographic and micro-liquid chromatographic determinations. The detection system is a direct-current, atmospheric-pressure, helium plasma emission spectrometer. The detector utilizes a non-transparent plasma source unit which contains the plasma region and two side-arms which receive effluents from the micro-liquid chromatograph and the gas chromatograph. The dual nature of this chromatographic system offers: (1) extreme flexibility in the samples to be examined; (2) extremely low sensitivity; (3) element selectivity; (4) long-term stability; (5) direct correlation of data from the liquid and gas samples; (6) simpler operation than with individual liquid and gas chromatographs, each with different detection systems; and (7) cheaper than a commercial liquid chromatograph and a gas chromatograph.
Dual-keel electrodynamic maglev system
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
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.
Dual-keel electrodynamic maglev system
He, Jianliang (Naperville, IL); Wang, Zian (Downers Grove, IL); Rote, Donald M. (Lagrange, IL); Coffey, Howard T. (Darien, IL); Hull, John R. (Westmont, IL); Mulcahy, Thomas M. (Western Springs, IL); Cal, Yigang (Woodridge, IL)
1996-01-01T23:59:59.000Z
A propulsion and stabilization system 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.
Dual power, constant speed electric motor system
Kirschbaum, H.S.
1984-07-31T23:59:59.000Z
A dual capacity permanent split capacitor electric motor system is provided with a stator having main and auxiliary windings. The main stator winding includes two winding sections which are connected in parallel with each other and across a pair of line terminals while the auxiliary winding is connected in series with a capacitor to form a circuit branch which is connected between the line terminals for operation at a first output power level. Switching means are provided to reconnect the main stator winding sections in series with each other and in series with a second capacitor to form a circuit branch which is connected between the line terminals while the stator auxiliary winding is connected directly between the line terminals for operation at a second output power level. Automatic rotation reversal occurs when the motor switches from the first to the second output power level. 6 figs.
Dual power, constant speed electric motor system
Kirschbaum, Herbert S. (Asheville, NC)
1984-01-01T23:59:59.000Z
A dual capacity permanent split capacitor electric motor system is provided with a stator having main and auxiliary windings. The main stator winding includes two winding sections which are connected in parallel with each other and across a pair of line terminals while the auxiliary winding is connected in series with a capacitor to form a circuit branch which is connected between the line terminals for operation at a first output power level. Switching means are provided to reconnect the main stator winding sections in series with each other and in series with a second capacitor to form a circuit branch which is connected between the line terminals while the stator auxiliary winding is connected directly between the line terminals for operation at a second output power level. Automatic rotation reversal occurs when the motor switches from the first to the second output power level.
A Monte Carlo study of the distribution of parameter estimators in a dual exponential decay model
Garcia, Raul
1969-01-01T23:59:59.000Z
of an estimate of the reliability of the parameter estimates calculated. In 1965, Bell and Garcia [2] developed a computer program which permits a solution of the parameters without the time-consuming effort of manual calcu- lations. The same year, Rossing [3...A MONTE CARLO STUDY OF THE DISTRIBUTION OF PARAMETER ESTIMATORS IN A DUAL EXPONENTIAL DECAY MODEL A Thesis by SAUL GARCIA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree...
Estimating Systems Engineering Reuse
Fortune, Jared
2009-04-20T23:59:59.000Z
Systems engineering reuse is the utilization of previously developed systems engineering products or artifacts such as
influences the partitioning of surface available energy into sensible and latent heat fluxes and henceA dual-pass variational data assimilation framework for estimating soil moisture profiles from AMSR, we have designed a dual-pass assimilation (DP-En4DVar) framework to optimize the model state
Variable Speed Drive (VSD) Applications in Dual-Duct Constant Volume Systems
Joo, I.; Liu, M.; Conger, K.; Wang, G.
2002-01-01T23:59:59.000Z
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...
Efficient Power System State Estimation
Lavaei, Javad
monitoring of power systems. 2. Background Power systems have four main components: transmission, sub-transmissionEfficient Power System State Estimation Zafirah Baksh Expected BS, Department of Electrical Engineering May 2013 ELEN E4511 Power Systems Analysis Professor Javad Lavaeiyanesi #12;1. Introduction Power
Contrast limitations of dual electrochromic systems J. Padilla *, T.F. Otero *
Otero, Toribio Fernández
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
Dual-range linearized transimpedance amplifier system
Wessendorf, Kurt O. (Albuquerque, NM)
2010-11-02T23:59:59.000Z
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).
Latchman, Haniph A.
when the system is Gaussian. Index Terms-- Dual control, entropy, Kalman filtering, state estimation. I systems. Fol- lowing the classical work of Gauss on least squares estimation and the modern day approach studies on least squares estimation. When applied to stochastic control systems, Kalman filtering theory
The thermodynamic dual structure of linear-dissipative driven systems
Eric Smith
2005-05-02T23:59:59.000Z
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.
Dual-circuit, multiple-effect refrigeration system and method
DeVault, Robert C. (Knoxville, TN)
1995-01-01T23:59:59.000Z
A dual circuit absorption refrigeration system comprising a high temperature single-effect refrigeration loop and a lower temperature double-effect refrigeration loop separate from one another and provided with a double-condenser coupling therebetween. The high temperature condenser of the single-effect refrigeration loop is double coupled to both of the generators in the double-effect refrigeration loop to improve internal heat recovery and a heat and mass transfer additive such as 2-ethyl-1-hexanol is used in the lower temperature double-effect refrigeration loop to improve the performance of the absorber in the double-effect refrigeration loop.
Dual annular rotating "windowed" nuclear reflector reactor control system
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
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.
Control Strategy for a Dual Loop EGR System to Meet Euro 6 and...
Broader source: Energy.gov (indexed) [DOE]
LP- EGR Cooler EGR Mixer HP- EGR Cooler VTG I4 diesel engine, common rail EGR & Turbo Charging System Architecture Base "Dual Loop" EGR system Layout Base engine HW: 2L...
Harmonizing Systems and Software Cost Estimation
Wang, Gan
2009-07-19T23:59:59.000Z
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 ...
Theoretical study of the dual harmonic system and its application on the CSNS/RCS
Yuan, Yao-Shuo; Xu, Shou-Yan; Yuan, Yue; Wang, Sheng
2015-01-01T23:59:59.000Z
The dual harmonic system has been widely used in high intensity proton synchrotrons to suppress the space charge effect, as well as reduce the beam loss. To investigate the longitudinal beam dynamics in the dual rf system, the potential well, the sub-buckets in the bunch and the multi-solutions of the phase equation have been studied theoretically. Based on these theoretical studis, the optimization of bunching factor and rf voltage waveform are made for the dual harmonic rf system in the upgrade phase of the CSNS/RCS. In the optimization process, the simulation with space charge effect is done by using a newly developed code C-SCSIM.
Dual-temperature Kalina cycle for geothermal-solar hybrid power systems
Boghossian, John G
2011-01-01T23:59:59.000Z
This thesis analyzes the thermodynamics of a power system coupling two renewable heat sources: low-temperature geothermal and a high-temperature solar. The process, referred to as a dual-temperature geothermal-solar Kalina ...
Haberl, J. S.
2001-01-01T23:59:59.000Z
This report contains engineering calculations for four (4) air-side, heating, ventilating and air-conditioning systems (HVAC) systems, including: dual duct constant volume (DDCAV), dual duct variable volume (DDVAV), constant volume with reheat...
Continuous Commissioning® of a Single Fan Dual Duct System in an Office Building
Dong, D.; Liu, M.
2005-01-01T23:59:59.000Z
The building has a total of 216 dual duct independent terminal boxes with air flow stations. The boxes are used for both interior and exterior zones. Pneumatic controllers and actuators are installed. A dual-duct single fan AHU serves the building... the setting. OPTIMAL CONTROL SCHEDULES The control schedule optimization includes terminal boxes, AHU, chillers, and boilers. All the pneumatic controls for the AHU system, except box controllers, are updated to DDC controls before the optimal...
Mandatory Photovoltaic System Cost Estimate
Broader source: Energy.gov [DOE]
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...
Statistical Risk Estimation for Communication System Design
May 2012 SSL # 6-12 #12;#12;Statistical Risk Estimation for Communication System Design Alessandra Babuscia, David W. Miller May 2012 SSL # 6-12 This work is based on the unaltered text of the thesis
Dual Stewart-Platform Gait Rehabilitation System for Individuals Post-Stroke
New Jersey, University of Medicine and Dentistry of
IWVR2003 92 Dual Stewart-Platform Gait Rehabilitation System for Individuals Post-Stroke R. F, robotics, gait rehabilitation, Stewart platform, force feedback, post-stroke patients Introduction Hardware and software Setup The Stewart-platforms developed for this system are based on the original
Dual manifold system and method for fluid transfer
Doktycz, Mitchel J. (Knoxville, TN); Bryan, William Louis (Knoxville, TN); Kress, Reid (Oak Ridge, TN)
2003-05-27T23:59:59.000Z
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds connected by a plurality of conduits. In operation, the aspiration manifold is actuated such that the aspiration manifold is seated onto an array of reagent-filled wells of the microtiter plate. The wells are pressurized to force reagent through conduits toward the dispense manifold. A pressure pulse provided by a standard ink-jet printhead ejects nanoliter-to-picoliter droplets of reagent through an array of printhead orifices and onto test sites on the surface of the microelectronic device.
Dual manifold system and method for fluid transfer
Doktycz, Mitchel J.; Bryan, William Louis; Kress, Reid
2003-09-30T23:59:59.000Z
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds connected by a plurality of conduits. In operation, the aspiration manifold is actuated such that the aspiration manifold is seated onto an array of reagent-filled wells of the microtiter plate. The wells are pressurized to force reagent through conduits toward the dispense manifold. A pressure pulse provided by a standard ink-jet printhead ejects nanoliter-to-picoliter droplets of reagent through an array of printhead orifices and onto test sites on the surface of the microelectronic device.
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 1 Airborne Wind Energy Based on Dual Airfoils
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 1 Airborne Wind Energy Based on Dual Airfoils Mario Zanon, S´ebastien Gros, Joel Andersson and Moritz Diehl Abstract--The Airborne Wind Energy paradigm Airborne Wind Energy enables flight in higher-altitude, stronger wind layers, the extra drag generated
Enhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n
Zuo, Lei
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
Identification and compensation of friction for a dual stage positioning system
Thimmalapura, Satish Voddina
2005-11-01T23:59:59.000Z
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...
PRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM
Römisch, Werner
PRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM R. Gollmer1 , A. Moller comprising thermal and pumped-storage hydro units a large-scale mixed-integer optimization model is developed aims at the cost optimal scheduling of on/o decisions and output levels for generating units. The power
IRAN UNDER MONGOL DOMINATION The effectiveness and failings of a dual administrative system
Paris-Sud XI, UniversitĂ© de
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
Dual attitude and parameter estimation of passively magnetically stabilized nano satellites$
panels. By using the existing solar panels, no additional components are being added to the spacecraft, and no additional mass, volume or power budget is being used. From differential solar panel currents, an estimate, CA 94305, United States b University of Michigan, 1320 Beal Ave, Ann Arbor, MI 48109, United States
Continuous Commissioning® of a Single Fan Dual Duct System in an Office Building
Dong, D.; Liu, M.
2005-01-01T23:59:59.000Z
in this case include installing VFD on the supply fan and return fan, updating all terminal boxes from CAV modes into VAV modes, resetting duct static pressure and supply air temperature, optimizing outside air intake and installing VFDs on chiller... are introduced in this paper. The technologies involve dual duct static pressure reset control, outside air intake in the morning, variable chilled water system control, and variable hot water system control. ESL-IC-10/05-15 1 CC ® has been achieving...
Design of a dual port volume measuring system
Klevgard, P.A.
1990-09-01T23:59:59.000Z
A volume measuring system is described which uses the ideal gas law and pressure measurements to determine an unknown vessel's volume when a gas expands into that vessel from a known volume. The design, the engineering principles, the calibration, and the accuracy of this computer-controlled system are all discussed. A set of electrical and mechanical drawings of the system is included. 3 refs., 6 figs.
JOINT-INDUSTRY PARTNERSHIP TO DEVELOP A HOLLOW SPHERE DUAL-GRADIENT DRILLING SYSTEM
William C. Maurer; Colin Ruan; Greg Deskins
2003-05-01T23:59:59.000Z
Maurer Technology Inc. (MTI) formed a joint-industry partnership to fund the development of a hollow sphere dual-gradient drilling (DGD) system. Phase I consisted of collecting, compiling, analyzing, and distributing information and data regarding a new DGD system for use by the oil and gas industry. Near the end of Phase I, DOE provided funding to the project that was used to conduct a series of critical follow-on tests investigating sphere separation in weighted waterbase and oilbase muds. Drilling costs in deep water are high because seawater pressure on the ocean floor creates a situation where many strings of casing are required due to the relatively close spacing between fracture and pore pressure curves. Approximately $100 million have been spent during the past five years on DGD systems that place pumps on the seafloor to reduce these drilling problems by reducing the annulus fluid pressure at the bottom of the riser. BP estimates that a DGD system can save $9 million per well in the Thunderhorse Field and Conoco estimates it can save $5 to $15 million per well in its deepwater operations. Unfortunately, previous DGD development projects have been unsuccessful due to the high costs ($20 to $50 million) and reliability problems with seafloor pump systems. MTI has been developing a simple DGD system concept that would pump hollow glass spheres into the bottom of the riser to reduce density of the mud in the riser. This eliminates the requirement for seafloor pumps and replaces them with low cost mud pumps, shale shakers, and other oilfield equipment that can be operated on the rig by conventional crews. A $1.8 million Phase I joint-industry project funded by five service companies and three operators showed that hollow spheres could be pumped well, but difficulties were encountered in separating the spheres from a polymer mud supplied by Halliburton due to the high viscosity of this mud at the low shear rates encountered on oilfield shale shaker screens. As a result, an excessive amount of this polymer mud flowed across the screen with the beads instead of through the screen. At the completion of the Phase I project, it was concluded that the hollow sphere system would not work effectively with the polymer mud tested. ExxonMobil and Shell engineers proposed that additional sphere separation tests needed to be conducted with weighted oilfield waterbase and oilbase muds to determine if the DGD system would work with these muds. The DOE agreed to provide a $200,000 grant for these tests. The DOE-funded tests, described in this report, showed that the spheres could be pumped with conventional oilfield centrifugal and triplex mud pumps and separated effectively from both oilfield waterbase and oilbase muds using conventional oilfield shale shakers and hydrocyclones. As a result of the success of these DOE tests, this DGD system is ready for full-scale field testing, first on land wells and later in the offshore environment. Maurer Technology Inc. is currently proposing a Phase II project to oil companies to further develop this DGD concept. This project would be funded by four to eight operators. If Phase II tests are successful, Noble plans to commercialize this system with a service company partner that will market and operate the DGD system on Noble's and other drilling contractors' rigs.
System-Level Logistics for Dual Purpose Canister Disposal
Kalinina, Elena A.
2014-06-03T23:59:59.000Z
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.
Dual sensitivity mode system for monitoring processes and sensors
Wilks, Alan D. (Mount Prospect, IL); Wegerich, Stephan W. (Glendale Heights, IL); Gross, Kenneth C. (Bolingbrook, IL)
2000-01-01T23:59:59.000Z
A method and system for analyzing a source of data. The system and method involves initially training a system using a selected data signal, calculating at least two levels of sensitivity using a pattern recognition methodology, activating a first mode of alarm sensitivity to monitor the data source, activating a second mode of alarm sensitivity to monitor the data source and generating a first alarm signal upon the first mode of sensitivity detecting an alarm condition and a second alarm signal upon the second mode of sensitivity detecting an associated alarm condition. The first alarm condition and second alarm condition can be acted upon by an operator and/or analyzed by a specialist or computer program.
Dual mode fuel injection system and fuel injector for same
Lawrence, Keith E.; Tian, Ye
2005-09-20T23:59:59.000Z
A fuel injection system has the ability to produce two different spray patterns depending on the positioning of a needle control valve member. Positioning of the needle control valve member determines which of the two needle control chambers are placed in a low pressure condition. First and second needle valve members have closing hydraulic surfaces exposed to fluid pressure in the two needle control chambers. The injector preferably includes a homogenous charge nozzle outlet set and a conventional nozzle outlet set controlled respectively, by the first and second needle valve members.
Haberl, J. S.; Bou-Saada, T. E.; Saman, N. F.
2001-01-01T23:59:59.000Z
This report contains engineering calculations for seven (7) air-side, heating, ventilating and air conditioning systems (HVAC) systems, including: dual duct constant volume (DDCAV), dual duct variable volume (DDVAV), constant volume with reheat...
Buksa, J.J.; Kirk, W.L.; Cappiello, M.W. (Nuclear Technology and Engineering Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (US))
1991-01-05T23:59:59.000Z
A preliminary assessment of the technical feasibility and mass competitiveness of a dual-mode nuclear propulsion and power system based on the NERVA rocket engine has been completed. Results indicate that the coupling of the ROVER reactor to a direct Brayton power conversion system can be accomplished through a number of design features. Furthermore, based on previously published and independently calculated component masses, the dual-mode system was found to have the potential to be mass competitive with propulsion/power systems that use separate reactors. The uncertainties of reactor design modification and shielding requirements were identified as important issues requiring future investigation.
Process for whole cell saccharification of lignocelluloses to sugars using a dual bioreactor system
Lu, Jue (Okemos, MI); Okeke, Benedict (Montgomery, AL)
2012-03-27T23:59:59.000Z
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.
Dual-mode self-validating resistance/Johnson noise thermometer system
Shepard, Robert L. (Oak Ridge, TN); Blalock, Theron V. (Knoxville, TN); Roberts, Michael J. (Knoxville, TN)
1993-01-01T23:59:59.000Z
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.
PDE Estimation Techniques for Advanced Battery Management Systems -Part I: SOC Estimation
Krstic, Miroslav
- 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 sensing and actuation exists to monitor and control the internal state of these systems. As such, battery
DFMA Cost Estimates of Fuel-Cell/Reformer Systems
Page 1 DFMA Cost Estimates of Fuel-Cell/Reformer Systems at Low/Medium/High Production Rates Brian estimates of complete fuel cell- reformer systems at low/medium/high manufacturing rates to assess of Boothroyd Dewhurst Inc. #12;Page 4 Scope of Project Reformer System Fuel Cell System Fuel Storage What
Estimating Power System Dynamic States Using Extended Kalman Filter
Huang, Zhenyu; Schneider, Kevin P.; Nieplocha, Jaroslaw; Zhou, Ning
2014-10-31T23:59:59.000Z
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.
Paris-Sud XI, Université de
regulation. The main contribution of this paper is to design a new control scheme based on model-free controlA Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel method allowing recent model-free control technique to deal with underactuated mechanical systems
A dual model-free control of non-minimum phase systems for generation of stable limit cycles
Paris-Sud XI, Université de
A dual model-free control of non-minimum phase systems for generation of stable limit cycles S parameters tuning. It is therefore easy to build a controller for an unknown system. Model-free control has of flow. In [14], model-free control methodology is applied to a power converter, where stable regulation
Blind Channel Estimation for Orthogonal STBC in MISO Systems
Adve, Raviraj
1 Blind Channel Estimation for Orthogonal STBC in MISO Systems Elzbieta Beres, and Raviraj Adve-input single-output (MISO) systems, with specific focus on Alamouti's code for two transmit antennas of the received signal. Unlike previous blind estimation schemes for MISO systems, the proposed algorithm
Complete System Power Estimation using Processor Performance Events
John, Lizy Kurian
Complete System Power Estimation using Processor Performance Events W. Lloyd Bircher and Lizy K measurement of complete system power consumption. The approach takes advantage of the "trickle-down" effect and existing on-chip performance event counters, it is possible to estimate system power consumption without
Dual annular rotating [open quotes]windowed[close quotes] nuclear reflector reactor control system
Jacox, M.G.; Drexler, R.L.; Hunt, R.N.M.; Lake, J.A.
1994-03-29T23:59:59.000Z
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.
Huang, Jianbin
Thermo-responsive viscoelastic wormlike micelle to elastic hydrogel transition in dual report a thermo-responsive phase transition from a viscoelastic wormlike micelle solution to an elastic
DualÂSamplingÂRate Moving Horizon Control of a Class of Linear Systems with Input SaturationÂsamplingÂrate moving horizon control scheme for a class of linear, continuousÂtime plants with strict input saturation, it is not computed by a simple linear feedback law, but as a solution of an optimal control problem. As a result
Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation and
Dual-Sampling-Rate Moving Horizon Control of a Class of Linear Systems with Input Saturation horizon control scheme for a class of linear, continuous-time plants with strict input saturation horizon control, robust, fast sampling, stability, linear sys- tems, input constraints 1 Introduction
Procedure and Application for Determining the Cold Deck and Hot Deck Airflow in a Dual-Duct System
Liu, G.; Mingsheng, L.
2006-01-01T23:59:59.000Z
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...
Electro-hydraulic control system for a dual-pass continuously variable transmission
Algrain, M.C.; Anderson, S.R.; Smirl, R.L.
1991-07-16T23:59:59.000Z
This patent describes a control system for controlling the hydraulic pressure in a dual-pass continuously variable transmission system having a plurality of drive paths from a power input to a power output, and a continuously variable component including first and second variable pulleys disposed respectively on first and second intermediate shafts, the transmission system having first and second clutches engagable to effect transition from a first drive path in which the first variable pulley is the driver pulley to a second drive path in which the second variable pulley is the driver pulley, the transmission system being releasable to effect a transition from the second drive path to the first drive path. It comprises means to provide a primary hydraulic pressure to each of the first and second variable pulleys; means for providing a secondary hydraulic pressure to each of the first and second variable pulleys; means for electrically regulating the primary and secondary pressures responsive to engine conditions; and means for directing the primary and secondary hydraulic pressures to the first and second variable pulleys in response to change of drive path.
Estimating Energy Savings in Compressed Air Systems
Schmidt, C.; Kissock, J. K.
2004-01-01T23:59:59.000Z
are frequently overestimated because the methods used to estimate savings neglect to consider important factors such as compressor control and type, storage, and multiple compressor operation. In this paper, a methodology is presented for modeling air... compressor performance and calculating projected energy savings from easily obtainable performance data such as full-load power, no-load power, rated capacity, average fraction full-load power or average fraction rated capacity. The methodology...
Cost estimation of human systems integration
Liu, Kevin K. (Kevin Kaitan), 1986-
2010-01-01T23:59:59.000Z
Human Systems Integration (HSI) is the interdisciplinary technical and management processes for integrating human considerations within and across all system elements. The goal of this research is to develop a better ...
Estimating Dual-scale Properties of Glossy Surfaces from Step-edge Lighting Chun-Po Wang
Keinan, Alon
-edge illumination from a pla- nar sample of a surface to estimate both the BRDF and the statistics of meso-scale
FITZGERALD, ERIC; KOENIG, RICHARD
2005-06-27T23:59:59.000Z
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.
Estimating the Actual Cost of Transmission System Congestion
straightforward. Assuming complete knowledge of the power system inputs, such as the loads at all system buses congestion on a large-scale power system, such as the North American Eastern Interconnect, the simplicityEstimating the Actual Cost of Transmission System Congestion Thomas J. Overbye Department
Imaging system for cardiac planar imaging using a dedicated dual-head gamma camera
Majewski, Stanislaw (Morgantown, VA); Umeno, Marc M. (Woodinville, WA)
2011-09-13T23:59:59.000Z
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.
Statistical risk estimation for communication system design
Babuscia, Alessandra
2012-01-01T23:59:59.000Z
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 ...
Estimation of system reliability using a semiparametric model
Wu, Leon
An important problem in reliability engineering is to predict the failure rate, that is, the frequency with which an engineered system or component fails. This paper presents a new method of estimating failure rate using ...
System to estimate ages and redshifts for radio galaxies
O. V. Verkhodanov; A. I. Kopylov; N. V. Verkhodanova; O. P. Zhelenkova; V. N. Chernenkov; Yu. N. Parijskij; N. S. Soboleva; A. V. Temirova
2001-12-06T23:59:59.000Z
The system allowing a user to operate with simulated curves of spectral energy distribution (SED) and to estimate ages and redshifts by photometric data at server {\\bf sed.sao.ru} is described.
Web integrated cost estimation system in architecture education
Darapureddy, K.S. Kiran
2001-01-01T23:59:59.000Z
these objectives a Web-based cost estimation system has been developed. This software has been developed using Active Server Pages (ASP), Microsoft Access database, Structured Query Language (SQL) and the Internet technology. In order to find students' inclination...
A Hierarchical Model for Estimating the Reliability of Complex Systems
Reese, Shane
an approximation to the joint posterior distribution on the total system reliability was obtained. Many reliability or bounding moments of the system reliability posterior distribution (Cole (1975), Mastran (1976), DostalA Hierarchical Model for Estimating the Reliability of Complex Systems Valen E. Johnson, Todd L
Electric Grid State Estimators for Distribution Systems with Microgrids
Gupta, Vijay
46556 Emails: {jhuang6,vgupta2,huang}@nd.edu Abstract--In the development of smart grid, state] into the distribution systems of the power grid. Such integration complicates the operation of distribution systemsElectric Grid State Estimators for Distribution Systems with Microgrids Jing Huang, Vijay Gupta
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Broader source: Energy.gov (indexed) [DOE]
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...
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Broader source: Energy.gov (indexed) [DOE]
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...
Empirical Estimates of 0Day Vulnerabilities in Control Systems
Miles A. McQueen; Wayne F. Boyer; Sean M. McBride; Trevor A. McQueen
2009-01-01T23:59:59.000Z
We define a 0Day vulnerability to be any vulnerability, in deployed software, which has been discovered by at least one person but has not yet been publicly announced or patched. These 0Day vulnerabilities are of particular interest when assessing the risk to well managed control systems which have already effectively mitigated the publicly known vulnerabilities. In these well managed systems the risk contribution from 0Days will have proportionally increased. To aid understanding of how great a risk 0Days may pose to control systems, an estimate of how many are in existence is needed. Consequently, using the 0Day definition given above, we developed and applied a method for estimating how many 0Day vulnerabilities are in existence on any given day. The estimate is made by: empirically characterizing the distribution of the lifespans, measured in days, of 0Day vulnerabilities; determining the number of vulnerabilities publicly announced each day; and applying a novel method for estimating the number of 0Day vulnerabilities in existence on any given day using the number of vulnerabilities publicly announced each day and the previously derived distribution of 0Day lifespans. The method was first applied to a general set of software applications by analyzing the 0Day lifespans of 491 software vulnerabilities and using the daily rate of vulnerability announcements in the National Vulnerability Database. This led to a conservative estimate that in the worst year there were, on average, 2500 0Day software related vulnerabilities in existence on any given day. Using a smaller but intriguing set of 15 0Day software vulnerability lifespans representing the actual time from discovery to public disclosure, we then made a more aggressive estimate. In this case, we estimated that in the worst year there were, on average, 4500 0Day software vulnerabilities in existence on any given day. We then proceeded to identify the subset of software applications likely to be used in some control systems, analyzed the associated subset of vulnerabilities, and characterized their lifespans. Using the previously developed method of analysis, we very conservatively estimated 250 control system related 0Day vulnerabilities in existence on any given day. While reasonable, this first order estimate for control systems is probably far more conservative than those made for general software systems since the estimate did not include vulnerabilities unique to control system specific components. These control system specific vulnerabilities were unable to be included in the estimate for a variety of reasons with the most problematic being that the public announcement of unique control system vulnerabilities is very sparse. Consequently, with the intent to improve the above 0Day estimate for control systems, we first identified the additional, unique to control systems, vulnerability estimation constraints and then investigated new mechanisms which may be useful for estimating the number of unique 0Day software vulnerabilities found in control system components. We proceeded to identify a number of new mechanisms and approaches for estimating and incorporating control system specific vulnerabilities into an improved 0Day estimation method. These new mechanisms and approaches appear promising and will be more rigorously evaluated during the course of the next year.
System and method for motor parameter estimation
Luhrs, Bin; Yan, Ting
2014-03-18T23:59:59.000Z
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.
Park, Seong-Ook
). The measurement system in a bi-static configuration is composed of Tx and Rx antennas, a mod- ulated dipole part consists of mixer and dual-phase lock-in amplifier using the modulating low frequency signal
ESTIMATION OF DELAY PROPAGATION IN AVIATION SYSTEM USING BAYESIAN NETWORK
delays is a major long-term objective of the Federal Aviation Administration (FAA). As demand1 ESTIMATION OF DELAY PROPAGATION IN AVIATION SYSTEM USING BAYESIAN NETWORK Ning Xu, George Donohue problems in the current aviation system. Methods are needed to analyze the manner in which micro
Estimation of Photovoltaic System Reliability and Performance Metrics
Liberzon, Daniel
1 Estimation of Photovoltaic System Reliability and Performance Metrics Sairaj V. Dhople, Student reliability and perfor- mance analysis of grid-tied photovoltaic (PV) systems is for- mulated using Markov and energy yield, and reliability metrics such as availability. The paper also provides an analytical method
Internal and Boundary Observability Estimates for the Heterogeneous Maxwell's System
Nicaise, Serge [Universite de Valenciennes et du Hainaut Cambresis, MACS, Institut des Sciences et Techniques de Valenciennes, 59313 Valenciennes Cedex 9 (France)], E-mail: snicaise@univ-valenciennes.fr; Pignotti, Cristina [Dipartimento di Matematica Pura e Applicata, Universita di L'Aquila, Via Vetoio, Loc. Coppito, 67010 L'Aquila (Italy)], E-mail: pignotti@univqaq.it
2006-06-15T23:59:59.000Z
Observability estimates for Maxwell's system with variable coefficients are established using the differential geometry method recently developed for scalar wave equations.The main tool is that Maxwell's system is reducible to a perturbed vectorial wave equation with a decoupled principal part.
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Applications: 2007 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2007 Update This report estimates fuel cell system cost...
ESTIMATING ENERGY SAVINGS IN COMPRESSED AIR SYSTEMS Chris Schmidt
Kissock, Kelly
ESTIMATING ENERGY SAVINGS IN COMPRESSED AIR SYSTEMS Chris Schmidt Project Engineer Energy Industrial Assessment Center Department of Mechanical Engineering University of Dayton Dayton, Ohio ABSTRACT energy savings must be calculated in order to justify the cost of implementing the savings opportunity
Development of an integrated system for estimating human error probabilities
Auflick, J.L.; Hahn, H.A.; Morzinski, J.A.
1998-12-01T23:59:59.000Z
This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project had as its main objective the development of a Human Reliability Analysis (HRA), knowledge-based expert system that would provide probabilistic estimates for potential human errors within various risk assessments, safety analysis reports, and hazard assessments. HRA identifies where human errors are most likely, estimates the error rate for individual tasks, and highlights the most beneficial areas for system improvements. This project accomplished three major tasks. First, several prominent HRA techniques and associated databases were collected and translated into an electronic format. Next, the project started a knowledge engineering phase where the expertise, i.e., the procedural rules and data, were extracted from those techniques and compiled into various modules. Finally, these modules, rules, and data were combined into a nearly complete HRA expert system.
Fuel Cell System for Transportation -- 2005 Cost Estimate
Wheeler, D.
2006-10-01T23:59:59.000Z
Independent review report of the methodology used by TIAX to estimate the cost of producing PEM fuel cells using 2005 cell stack technology. The U.S. Department of Energy (DOE) Hydrogen, Fuel Cells and Infrastructure Technologies Program Manager asked the National Renewable Energy Laboratory (NREL) to commission an independent review of the 2005 TIAX cost analysis for fuel cell production. The NREL Systems Integrator is responsible for conducting independent reviews of progress toward meeting the DOE Hydrogen Program (the Program) technical targets. An important technical target of the Program is the proton exchange membrane (PEM) fuel cell cost in terms of dollars per kilowatt ($/kW). The Program's Multi-Year Program Research, Development, and Demonstration Plan established $125/kW as the 2005 technical target. Over the last several years, the Program has contracted with TIAX, LLC (TIAX) to produce estimates of the high volume cost of PEM fuel cell production for transportation use. Since no manufacturer is yet producing PEM fuel cells in the quantities needed for an initial hydrogen-based transportation economy, these estimates are necessary for DOE to gauge progress toward meeting its targets. For a PEM fuel cell system configuration developed by Argonne National Laboratory, TIAX estimated the total cost to be $108/kW, based on assumptions of 500,000 units per year produced with 2005 cell stack technology, vertical integration of cell stack manufacturing, and balance-of-plant (BOP) components purchased from a supplier network. Furthermore, TIAX conducted a Monte Carlo analysis by varying ten key parameters over a wide range of values and estimated with 98% certainty that the mean PEM fuel cell system cost would be below DOE's 2005 target of $125/kW. NREL commissioned DJW TECHNOLOGY, LLC to form an Independent Review Team (the Team) of industry fuel cell experts and to evaluate the cost estimation process and the results reported by TIAX. The results of this independent review will permit NREL and DOE to better understand the credibility of the TIAX cost estimation process and to implement changes in future cost analyses, if necessary. The Team found the methodology used by TIAX to estimate the cost of producing PEM fuel cells to be reasonable and, using 2005 cell stack technology and assuming production of 500,000 units per year, to have calculated a credible cost of $108/kW.
Low and high Temperature Dual Thermoelectric Generation Waste...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery...
Performance enhancement approaches for a dual energy x-ray
Fu, Kenneth
2010-01-01T23:59:59.000Z
Evans, J.P.O. , “Stereoscopic dual energy imaging for targetCrawford, C.R. , “Dual Energy Volumetric X-ray Tomographicimages in 4–10 MeV Dual- energy customs system for material
Wise, Evan Dale
2013-01-01T23:59:59.000Z
The Microsized Microwave Atmospheric Satellite (MicroMAS) combines two traditional control approaches: a dual spinner and a three-axis gyrostat. Unlike typical dual spinners, the purpose of MicroMAS 's 2U bus and spinner ...
Dual Loop Parallel/Series Waste Heat Recovery System | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197E TDrew Bittner About Us DrewDual Loop Parallel/Series
Liu, M.; Abbas, M.; Veteto, B.; Claridge, D. E.; Bruner, H.
1998-01-01T23:59:59.000Z
reduced the chilled water energy consumption by 7,571 MMBtu/yr (18%) and 303 MWh/yr (18%) for the fan power. The estimated heating energy savings are 2,327 MMBtu/yr. The estimated annual cost savings are $75,040/yr. This paper presents the building and AHU...
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2008 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for...
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...
Reduced Measurement-space Dynamic State Estimation (ReMeDySE) for Power Systems
Zhang, Jinghe; Welch, Greg; Bishop, Gary; Huang, Zhenyu
2011-06-19T23:59:59.000Z
Abstract- Applying Kalman filtering techniques to dynamic state estimation is a developing research area in modern power systems.
Kieper, Douglas Arthur; Majewski, Stanislaw; Welch, Benjamin L.
2012-07-03T23:59:59.000Z
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.
RADIOISOTOPE-DRIVEN DUAL-MODE PROPULSION SYSTEM FOR CUBESAT-SCALE PAYLOADS TO THE OUTER PLANETS
N. D. Jerred; T. M. Howe; S. D. Howe; A. Rajguru
2014-02-01T23:59:59.000Z
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.
Fourier methods for estimating power system stability limits
Marceau, R.J.; Galiana, F.D. (McGill Univ., Montreal, Quebec (Canada). Dept. of Electrical Engineering); Mailhot, R.; Denomme, F.; McGillis, D.T. (Hydro Quebec, Montreal, Quebec (Canada))
1994-05-01T23:59:59.000Z
This paper shows how the use of new generation tools such as a generalized shell for dynamic security analysis can help improve the understanding of fundamental power systems behavior. Using the ELISA prototype shell as a laboratory tool, it is shown that the signal energy of the network impulse response acts as a barometer to define the relative severity of a contingency with respect to some parameter, for instance power generation or power transfer. In addition, for a given contingency, as the parameter is varied and a network approaches instability, signal energy increases smoothly and predictably towards an asymptote which defines the network's stability limit: this, in turn, permits comparison of the severity of different contingencies. Using a Fourier transform approach, it is shown that this behavior can be explained in terms of the effect of increasing power on the damping component of a power system's dominant poles. A simple function is derived which estimates network stability limits with surprising accuracy from two or three simulations, provided that at least one of these is within 5% of the limit. These results hold notwithstanding the presence of many active, nonlinear voltage-support elements (i.e. generators, synchronous condensers, SVCs, static excitation systems, etc.) in the network.
Statistical estimation of water distribution system pipe break risk
Yamijala, Shridhar
2009-05-15T23:59:59.000Z
and maintenance decisions. A number of statistical methods have been proposed for this estimation problem. This thesis focuses on comparing these statistical models on the basis of short time histories. The goals of this research are to estimate the likelihood...
Analysis of power estimation techniques in CDMA systems
Pei, Ying
1999-01-01T23:59:59.000Z
estimation techniques, the expectation maximization (EM) algorithm, the decorrelating estimator and the averaging method, on both AWGN and Rayleigh fading channels. The implementation of the EM algorithm on TMS320C62 is also presented. The performance...
Blind CFO estimation for OFDM-IDMA system in Rayleigh fading multipath channel
Paris-Sud XI, Université de
- 1 - Blind CFO estimation for OFDM-IDMA system in Rayleigh fading multipath channel Yasamine to adapt a method of blind CFO estimation, called CFO estimation-Syndrome Function Minimization (C- SFM show that, for high Eb/N0, the two systems have the same performance. Key words: Blind carrier
Baldick, Ross
) and the Southwest Power Pool (SPP) systems. I. INTRODUCTION TO HOST SCADA and Energy Management System soft- ware1240 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 15, NO. 4, NOVEMBER 2000 State Estimation Distributed- rithm to Power Systems State Estimation. We apply the Auxiliary Problem Principle to develop
Control Strategy for a Dual Loop EGR System to Meet Euro 6 and...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
More Documents & Publications Can Future Emissions Limits be Met with a Hybrid EGR System Alone? Strategies for In-Cylinder Reductions to Reach Bin 2 and LEV III...
New Results in Stability, Control, and Estimation of Fractional Order Systems
Koh, Bong Su
2012-07-16T23:59:59.000Z
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...
Freeman, Matthew A
2006-10-30T23:59:59.000Z
investigates the benefits that stem from utilizing a multi-area state estimator instead of a serial state estimator. These benefits are largely in the form of increased accuracy and decreased processing time. First, the theory behind power system state...
Dual-Doppler observations of the formative stage of an asymmetric squall line system
Jamieson, Daniel Richard
2002-01-01T23:59:59.000Z
The objective of this study is to document and explain the formation of a large asymmetric squall line system. Despite having a precipitation pattern similar to the conceptual model of an asymmetric squall line, the development and evolution...
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
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.
Liu, T.; Ding, A.; Ji, W.; Xu, X. G. [Nuclear Engineering and Engineering Physics, Rensselaer Polytechnic Inst., Troy, NY 12180 (United States); Carothers, C. D. [Dept. of Computer Science, Rensselaer Polytechnic Inst. RPI (United States); Brown, F. B. [Los Alamos National Laboratory (LANL) (United States)
2012-07-01T23:59:59.000Z
Monte Carlo (MC) method is able to accurately calculate eigenvalues in reactor analysis. Its lengthy computation time can be reduced by general-purpose computing on Graphics Processing Units (GPU), one of the latest parallel computing techniques under development. The method of porting a regular transport code to GPU is usually very straightforward due to the 'embarrassingly parallel' nature of MC code. However, the situation becomes different for eigenvalue calculation in that it will be performed on a generation-by-generation basis and the thread coordination should be explicitly taken care of. This paper presents our effort to develop such a GPU-based MC code in Compute Unified Device Architecture (CUDA) environment. The code is able to perform eigenvalue calculation under simple geometries on a multi-GPU system. The specifics of algorithm design, including thread organization and memory management were described in detail. The original CPU version of the code was tested on an Intel Xeon X5660 2.8 GHz CPU, and the adapted GPU version was tested on NVIDIA Tesla M2090 GPUs. Double-precision floating point format was used throughout the calculation. The result showed that a speedup of 7.0 and 33.3 were obtained for a bare spherical core and a binary slab system respectively. The speedup factor was further increased by a factor of {approx}2 on a dual GPU system. The upper limit of device-level parallelism was analyzed, and a possible method to enhance the thread-level parallelism was proposed. (authors)
DualTrust: A Trust Management Model for Swarm-Based Autonomic Computing Systems
Maiden, Wendy M.
2010-05-01T23:59:59.000Z
Trust management techniques must be adapted to the unique needs of the application architectures and problem domains to which they are applied. For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, certain characteristics of the mobile agent ant swarm -- their lightweight, ephemeral nature and indirect communication -- make this adaptation especially challenging. This thesis looks at the trust issues and opportunities in swarm-based autonomic computing systems 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. After analyzing the applicability of trust management research as it has been applied to architectures with similar characteristics, this thesis specifies the required characteristics for trust management mechanisms used to monitor the trustworthiness of entities in a swarm-based autonomic computing system and describes a trust model that meets these requirements.
Imaging properties of the Medipix2 system exploiting single and dual energy thresholds
Tlustos, Lukas; Campbell, Michael; Heijne, Erik H M; Kincade, Karla Lorraine; Llopart-Cudie, Xavier; Stejskal, Pavel
2006-01-01T23:59:59.000Z
Low noise, high resolution and high dose efficiency are the common requirements for most X-ray imaging applications. Especially in medical applications the dose efficiency is a necessity for detector systems. We present the imaging performance of the Medipix2 readout chip bump bonded to a 300 mu m thick Si detector as a function of the detection threshold, a free parameter not available in conventional integrating imaging systems. Spatial resolution has been measured using the modulation transfer function (MTF) and it varies between 8.2 Ip/mm and 11.0 Ip/mm at 70%. An associated measurement of noise power spectrum (NPS) permits us to derive the detective quantum efficiency (DQE) which can be as a high as 25.5 % for a broadband incoming spectrum. The influence of charge diffusion in the sensor together with threshold variation in the readout chip is discussed. Although the Medipix2 system is used in photon counting mode with a single threshold in energy, the system is also capable of counting within a given en...
Run-time Modeling and Estimation of Operating System Power Consumption
John, Lizy Kurian
Run-time Modeling and Estimation of Operating System Power Consumption Tao Li Department computing systems point to the need for power modeling and estimation for all components of a system software power evaluation, as well as power management (e.g. dynamic thermal control and equal energy
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
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Application Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application This presentation reports on the status of mass production cost...
Garg, Saurabh; David Dornfeld
2008-01-01T23:59:59.000Z
FOR ESTIMATING CARBON FOOTPRINT OF ACADEMIA LIBRARY SYSTEMSacross the world. A carbon footprint is a measure of thethat can calculate the carbon footprint of a library system
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Mass Production Cost Estimation for Direct H 2 PEM Fuel Cell Systems for Automotive Applications: 2007 Update February 29, 2008 Final Version Brian D. James Jeffrey A. Kalinoski...
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
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...
Iterative Spatial Sequence Estimator for Multi-Group Space Time Trellis Coded Systems
Al-Ghadhban, Samir
Iterative Spatial Sequence Estimator for Multi-Group Space Time Trellis Coded Systems Samir Al. The developed detector is called maximum a posteriori spatial sequence estimator and it has the flexibility. A novel spatial sequence estimator (SSE) for V-BLAST is proposed in [4]. The algorithm combines group
Estimation techniques for large-scale turbulent fluid systems
Colburn, Christopher Hughes
2011-01-01T23:59:59.000Z
R. 1972 Linear Optimal Control Systems. Wiley- Intersciencetime optimal control theory applied to the linear system (time optimal control theory applied to the linear system (
Feasibility Studies of Applying Kalman Filter Techniques to Power System Dynamic State Estimation
Huang, Zhenyu; Schneider, Kevin P.; Nieplocha, Jarek
2007-08-01T23:59:59.000Z
Abstract—Lack of dynamic information in power system operations mainly attributes to the static modeling of traditional state estimation, as state estimation is the basis driving many other operations functions. This paper investigates the feasibility of applying Kalman filter techniques to enable the inclusion of dynamic modeling in the state estimation process and the estimation of power system dynamic states. The proposed Kalman-filter-based dynamic state estimation is tested on a multi-machine system with both large and small disturbances. Sensitivity studies of the dynamic state estimation performance with respect to measurement characteristics – sampling rate and noise level – are presented as well. The study results show that there is a promising path forward to implementation the Kalman-filter-based dynamic state estimation with the emerging phasor measurement technologies.
Vasquez, M. R., E-mail: mrvasquez@upd.edu.ph [Department of Mining, Metallurgical, and Materials Engineering, College of Engineering, University of the Philippines, Diliman, Quezon City 1101 (Philippines); Tokumura, S.; Kasuya, T.; Wada, M. [Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321 (Japan)] [Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321 (Japan)
2014-02-15T23:59:59.000Z
Discharge characteristics in the upstream as well as in the downstream regions of a 50-eV positive ion beam were measured along the beam axis. Single- and dual-electrode configurations made of 0.1-mm diameter tungsten wires were tested. By varying the upstream discharge parameters, the shape of the sheath edge around the extractors, which can either be “planar” or “cylindrical,” can be controlled. The sheath eventually affected the simultaneous extraction of ions and neutralizing electrons. The dual-electrode configuration at the lower discharge current, revealed a homogeneous discharge downstream. At this condition, the edge of the sheath can be inferred to be “planar” which allowed the uniform extraction and propagation of low-energy ions at longer distances. The dual-electrode configuration was capable of transmitting low-energy ions up to 70 mm downstream.
Tabares Velasco, P. C.
2011-04-01T23:59:59.000Z
This presentation discusses estimating heat and mass transfer processes in green roof systems: current modeling capabilities and limitations. Green roofs are 'specialized roofing systems that support vegetation growth on rooftops.'
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
for Direct H2 PEM Fuel Cell Systems for Automotive Application: 2009 Update Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Application: 2009...
Cost estimation of functional and physical changes made to complex systems
Jeziorek, Peter Nicholas, 1981-
2005-01-01T23:59:59.000Z
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 ...
Freeman, Matthew A
2006-10-30T23:59:59.000Z
The objective of this thesis is to prove the validity of a multi-area state estimator and investigate the advantages it provides over a serial state estimator. This is done utilizing the IEEE 118 Bus Test System as a sample system. This thesis...
Estimation of global posteriors and forward-backward training of hybrid HMM/ANN systems.
Hennebert, J; Ris, C; Bourlard, Herve; Renals, Steve; Morgan, Nelson
1997-01-01T23:59:59.000Z
The results of our research presented in this paper are two-fold. First, an estimation of global posteriors is formalized in the framework of hybrid HMM/ANN systems. It is shown that hybrid HMM/ANN systems, in which the ANN part estimates local...
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
Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant
Kumar, Aditya; Shi, Ruijie; Dokucu, Mustafa
2013-09-17T23:59:59.000Z
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.
Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
Lee, Jungkyu
2012-07-16T23:59:59.000Z
for multi-band applications. A modified Butler matrix is used to reduce a size and a sidelobe level. The bandwidth of the microstrip antenna is inherently small. A broadband circularly polarized microstrip antenna with dual-offset feedlines is introduced...
JOINT CHANNEL AND FREQUENCY OFFSET ESTIMATION FOR OFDM SYSTEMS
Arslan, HĂĽseyin
. of Electrical Eng., University of South Florida and Raytheon Company 4202 E. Fowler Avenue, ENB-118, Tampa, FL 1501 72th Street North, Saint Petersburg, FL yucek@eng.usf.edu mohamed k nezami@raytheon.com ABSTRACT is transmitted and This work is supported by Raytheon Company. frequency offset is estimated by finding the phase
SWITCHING TIME ESTIMATION OF PIECEWISE LINEAR SYSTEMS. APPLICATION TO DIAGNOSIS
Boyer, Edmond
systems. Recently (Alessandri, 2001), Alessandri considered the case where continuous evolution is linear
Evaluation of liquid lift approach to dual gradient
Okafor, Ugochukwu Nnamdi
2009-05-15T23:59:59.000Z
............................................... 4 2.2 Dual Gradient Drilling Method.............................................. 5 2.3 Methods of Achieving Dual Gradient Drilling ...................... 9 2.3.1 Subsea Mudlift Drilling... ................................................... 9 2.5 Schematic diagram of a modified subsea mudlift system .......................... 11 2.6 Hollow glass-spheres dual gradient drilling system................................... 13 2.7 A typical offshore drilling rig modified...
Evaluation of liquid lift approach to dual gradient drilling
Okafor, Ugochukwu Nnamdi
2008-10-10T23:59:59.000Z
............................................... 4 2.2 Dual Gradient Drilling Method.............................................. 5 2.3 Methods of Achieving Dual Gradient Drilling ...................... 9 2.3.1 Subsea Mudlift Drilling... ................................................... 9 2.5 Schematic diagram of a modified subsea mudlift system .......................... 11 2.6 Hollow glass-spheres dual gradient drilling system................................... 13 2.7 A typical offshore drilling rig modified...
Economics of dual purpose production alternatives in the Mexican tropics
Ochoa-Ochoa, Rene Federico
1997-01-01T23:59:59.000Z
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 ...
Economics of dual purpose production alternatives in the Mexican tropics
Ochoa-Ochoa, Rene Federico
1997-01-01T23:59:59.000Z
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...
Estimation of the WECC System Inertia Using Observed Frequency Transients
David P. Chassin; Zhenyu Huang; Matthew K. Donnelly; Candee Hassler; Enrique Ramirez; Cody Ray
2004-12-28T23:59:59.000Z
Computer models being developed to understand the interaction between demand-response technology, power system deregulation and market transformation depend in part on understanding the relationship between system frequency and load-control. Frequency, load, and plant outage events data collected over the last several years have permitted analysis to determine the Western Electricity Coordination Council (WECC) system's inertia during each event. This data was used to evaluate the relationship of system inertia to total load, which is used to model system response to load curtailment programs in next generation power system simulations.
Pumping System Measurements To Estimate Energy Savings: Why and How
Casada, D.
2007-01-01T23:59:59.000Z
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...
1 N. Logic, E. Kyriakides, G. T. Heydt, "Lp State Estimators for Power Systems," N. Logic, E. Kyriakides, G. T. Heydt, "Lp state estimators for power systems," Journal of Electric Power Components and Systems, accepted for publication, 2002. #12;2 Lp State Estimators for Power Systems N. Logic E
Load Modeling and State Estimation Methods for Power Distribution Systems: Final Report
Tom McDermott
2010-05-07T23:59:59.000Z
The project objective was to provide robust state estimation for distribution systems, comparable to what has been available on transmission systems for decades. This project used an algorithm called Branch Current State Estimation (BCSE), which is more effective than classical methods because it decouples the three phases of a distribution system, and uses branch current instead of node voltage as a state variable, which is a better match to current measurement.
Nathan Jerred; Troy Howe; Adarsh Rajguru; Dr. Steven Howe
2014-06-01T23:59:59.000Z
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.
Two Touch System Latency Estimators: High Accuracy and Low Overhead
Paris-Sud XI, Université de
for their screen size and definition, but their technical specifications never includes latency. In research, even known to degrade user's performance. Touch systems exhibit notable amount of latencies, but it is seldom Terms Human Factors, measurement, performance. INTRODUCTION Every interactive system exhibits some
Blind Channel Estimation in OFDM Systems by Relying on the Gaussian Assumption of the Input
Quadeer, Ahmed Abdul
Blind Channel Estimation in OFDM Systems by Relying on the Gaussian Assumption of the Input T. Y methods rely on some form of training which reduces the useful data rate. Here instead we blindly estimate maxima of the ML objective function. One is the blind Genetic algorithm and the other is the semi-blind
ESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0
Feeny, Brian
ESTIMATING DAMPING PARAMETERS IN MULTI-DEGREE-OF-FREEDOM VIBRATION SYSTEMS BY BALANCING ENERGY0 B is outlined, involving a balance of dissipated and supplied energies over a cycle of pe- riodic vibration a damping estimation method based on the balance of energy. The idea is to compute the energy input per
THE GREEN FUNCTION ESTIMATES FOR STRONGLY ELLIPTIC SYSTEMS OF SECOND ORDER
Hofmann, Steve
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
Estimating Data-Dependent Jitter of a General LTI System from Step Response
Hajimiri, Ali
Estimating Data-Dependent Jitter of a General LTI System from Step Response Behnam Analui, James Buckwalter, and Ali Hajimiri Abstract - We present a method for estimating data dependent jitter (DDJ the probability distribution of jitter. In particular, we identify a dominant prior bit that signifies the well
Sophie Schirmer; Frank Langbein
2014-12-13T23:59:59.000Z
We compare the accuracy, precision and reliability of different methods for estimating key system parameters for two-level systems subject to Hamiltonian evolution and decoherence. It is demonstrated that the use of Bayesian modelling and maximum likelihood estimation is superior to common techniques based on Fourier analysis. Even for simple two-parameter estimation problems, the Bayesian approach yields higher accuracy and precision for the parameter estimates obtained. It requires less data, is more flexible in dealing with different model systems, can deal better with uncertainty in initial conditions and measurements, and enables adaptive refinement of the estimates. The comparison results shows that this holds for measurements of large ensembles of spins and atoms limited by Gaussian noise as well as projection noise limited data from repeated single-shot measurements of a single quantum device.
Estimation of WECC System Inertia Using Observed Frequency Transients
Chassin, David P.; Huang, Zhenyu; Donnelly, Matt K.; Hassler, Candee A.; Ramirez, Enrique; Ray, Cody W.
2005-04-19T23:59:59.000Z
As demand for electricity in the western United States increases, stresses upon the aging power grid are intensifying. Computer models based on complex mathematical relationships are being developed to assist in understanding the impact of deregulation and market transformation. Frequency, load, and plant outage events data collected over the last several years. Analysis of these events was performed to determine frequency deviation and the systems inertial constant (M) during each event. Utilizing a theoretical relationship that relates system inertia to power loss, M was calculated for 157 events. The relationship of M to system wide load was then examined.
Estimation Strategies for Constrained and Hybrid Dynamical Systems
Parish, Julie Marie Jones
2012-10-19T23:59:59.000Z
finite- and infinite-dimensional coordinates. The associated governing equations are integro-partial differential equations. As with constrained systems, these governing equations must be transformed in order to employ the CDEKF. Here, this transformation...
Mode Estimation of Modelbased Programs: Monitoring Systems with Complex Behavior
Williams, Brian C.
that combines reactive programming constructs with probabilistic, constraintÂbased modeling, and that offers wending its way through software functions. DSÂ1 is an instance of modern embedded systems whose
Mobile sensor systems for field estimation and "hot spot" identification
Kumar, Sumeet, Ph. D. Massachusetts Institute of Technology
2014-01-01T23:59:59.000Z
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 ...
Systematic methodology for estimating direct capital costs for blanket tritium processing systems
Finn, P.A.
1985-01-01T23:59:59.000Z
This paper describes the methodology developed for estimating the relative capital costs of blanket processing systems. The capital costs of the nine blanket concepts selected in the Blanket Comparison and Selection Study are presented and compared.
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Applications: 2010 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...
Griffith, Daniel Todd
2005-02-17T23:59:59.000Z
The main objective of this work is to demonstrate some new computational methods for estimation, optimization and modeling of dynamical systems that use automatic differentiation. Particular focus will be upon dynamical ...
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
estimates for material and manufacturing costs of complete 80 kWnet direct-hydrogen proton exchange membrane fuel cell systems suitable for powering light-duty automobiles. Mass...
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
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...
Lemmon, Michael
-triggered Message Passing 1 Introduction This project will investigate distributed optimization, estimation, and control of networked systems through the use of event-triggered message passing. Networked systems consist of distributed decision systems. Indi- vidual agents coordinate their actions through message exchanges
Distributed state estimation and model predictive control of linear interconnected system
Boyer, Edmond
requirements, modern control systems are becoming more and more complex. For these processes, different controlDistributed state estimation and model predictive control of linear interconnected system: In this paper, a distributed and networked control system architecture based on independent Model Predictive
PDE Estimation Techniques for Advanced Battery Management Systems -Part II: SOH Identification
Krstic, Miroslav
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 sensing and actuation exists to monitor and control the internal state of these systems. As such, battery
UNCERTAINTY-DRIVEN ADAPTIVE ESTIMATION WITH APPLICATIONS IN ELECTRICAL POWER SYSTEMS
Welch, Greg
UNCERTAINTY-DRIVEN ADAPTIVE ESTIMATION WITH APPLICATIONS IN ELECTRICAL POWER SYSTEMS Jinghe Zhang in Electrical Power Systems (Under the direction of Gregory F. Welch) From electrical power systems areas: 1. Grid Sensor Placement. I present a method that combines off-line steady-state uncer- tainty
SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING
SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about
On the Parameter Estimation of Linear Models of Aggregate Power System Loads
Cańizares, Claudio A.
1 On the Parameter Estimation of Linear Models of Aggregate Power System Loads Valery Knyazkin-- This paper addressed some theoretical and practical issues relevant to the problem of power system load, and the corresponding results are used to validate a commonly used linear model of aggre- gate power system load
Complete System Power Estimation: A Trickle-Down Approach Based on Performance Events
John, Lizy Kurian
Complete System Power Estimation: A Trickle-Down Approach Based on Performance Events W. Lloyd of microprocessor performance counters for online measurement of complete system power consumption. While past knowledge, we are the first to create power models for the entire system based on processor performance
ACCEPTED TO IEEE TRANSACTIONS ON POWER SYSTEMS 1 On the Parameter Estimation and Modeling of
Cańizares, Claudio A.
ACCEPTED TO IEEE TRANSACTIONS ON POWER SYSTEMS 1 On the Parameter Estimation and Modeling of Aggregate Power System Loads Valery Knyazkin, Student Member, IEEE, Claudio Ca~nizares, Senior Member, IEEE relevant to the problem of power system load modeling and identification. Two identification techniques
Goble, G.H.; Marsh, M.H.
1982-01-01T23:59:59.000Z
The design of a dual processor Vax 11/780 built at the Purdue University Electrical Engineering School is described. A standard single processor Vax 11/780 was converted into a dual processor system. A detailed description of hardware modifications performed and a parts list are included. The dual processor Vax is currently running a modified version of the UNIX** (fourth Berkeley distribution) operating system. Because of licensing restrictions, operating system modifications are only covered in general. Finally some performance evaluation is discussed, along with the problems encountered.
Dual porosity gas evolving electrode
Townsend, C.W.
1994-11-15T23:59:59.000Z
A dual porosity electrode is described for use in thermoelectrochemical systems where simultaneous transport of gas and liquid into and/or out of the electrode is required. The electrode includes catalytic electrode particles having diameters ranging from about 25 to 100 angstroms. The catalytic electrode particles are anchored to a support network in clusters which have internal pores ranging in size from 25 to 100 angstroms. The pores between the clusters range in size from between about 1 to 20 microns. A method for making the dual porosity electrodes is also disclosed.
UWB dual burst transmit driver
Dallum, Gregory E. (Livermore, CA); Pratt, Garth C. (Discovery Bay, CA); Haugen, Peter C. (Livermore, CA); Zumstein, James M. (Livermore, CA); Vigars, Mark L. (Livermore, CA); Romero, Carlos E. (Livermore, CA)
2012-04-17T23:59:59.000Z
A dual burst transmitter for ultra-wideband (UWB) communication systems generates a pair of precisely spaced RF bursts from a single trigger event. An input trigger pulse produces two oscillator trigger pulses, an initial pulse and a delayed pulse, in a dual trigger generator. The two oscillator trigger pulses drive a gated RF burst (power output) oscillator. A bias driver circuit gates the RF output oscillator on and off and sets the RF burst packet width. The bias driver also level shifts the drive signal to the level that is required for the RF output device.
Optimal PMU Placement Evaluation for Power System Dynamic State Estimation
Bishop, Gary
flow along the transmission lines or transformers. Â· Bus power injection measurements: the real of dis- tribution systems, the line current magnitude measurements (along the transmission lines. Â· Current phasor measurements: the phase angles and mag- nitudes of current phasors along transmission lines
Exogenous input estimation in Electronic Power Steering (EPS) systems
Paris-Sud XI, Université de
, observation and control towards a new generation of Electrical Power Steering(EPS) systems. In particular.1 (T5.1) for the design of the control law to eliminate the high frequency oscillations of the steering the observer and the control; block 2 includes the tyre-friction model and block 3 includes the reference model
Kulkarni, Nagraj S. (Knoxville, TN); Kasica, Richard J. (Ashburn, VA) ,
2011-03-08T23:59:59.000Z
A dual-chamber reactor can include a housing enclosing a volume having a divider therein, where the divider defines a first chamber and a second chamber. The divider can include a substrate holder that supports at least one substrate and exposes a first side of the substrate to the first chamber and a second side of the substrate to the second chamber. The first chamber can include an inlet for delivering at least one reagent to the first chamber for forming a film on the first side of the substrate, and the second chamber can include a removal device for removing material from the second side of the substrate.
Sandia Energy - Estimating Device or System Probability of Failure
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementing Nonlinear757 (1)Tara46Energy Storage Systems
Evans, Joshua D., E-mail: jevans2@mcvh-vcu.edu; Yu, Yaduo; Williamson, Jeffrey F. [Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States)] [Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia 23298 (United States); Whiting, Bruce R. [Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213 (United States)] [Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213 (United States); O’Sullivan, Joseph A. [Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130 (United States)] [Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130 (United States); Politte, David G. [Mallinckrodt Institute of Radiology, Washington University, St. Louis, Missouri 63110 (United States)] [Mallinckrodt Institute of Radiology, Washington University, St. Louis, Missouri 63110 (United States); Klahr, Paul H. [Philips Healthcare, 595 Miner Rd., Highland Hts., Ohio 44143 (United States)] [Philips Healthcare, 595 Miner Rd., Highland Hts., Ohio 44143 (United States)
2013-12-15T23:59:59.000Z
Purpose: Accurate patient-specific photon cross-section information is needed to support more accurate model-based dose calculation for low energy photon-emitting modalities in medicine such as brachytherapy and kilovoltage x-ray imaging procedures. A postprocessing dual-energy CT (pDECT) technique for noninvasivein vivo estimation of photon linear attenuation coefficients has been experimentally implemented on a commercial CT scanner and its accuracy assessed in idealized phantom geometries. Methods: Eight test materials of known composition and density were used to compare pDECT-estimated linear attenuation coefficients to NIST reference values over an energy range from 10 keV to 1 MeV. As statistical image reconstruction (SIR) has been shown to reconstruct images with less random and systematic error than conventional filtered backprojection (FBP), the pDECT technique was implemented with both an in-house polyenergetic SIR algorithm, alternating minimization (AM), as well as a conventional FBP reconstruction algorithm. Improvement from increased spectral separation was also investigated by filtering the high-energy beam with an additional 0.5 mm of tin. The law of propagated uncertainty was employed to assess the sensitivity of the pDECT process to errors in reconstructed images. Results: Mean pDECT-estimated linear attenuation coefficients for the eight test materials agreed within 1% of NIST reference values for energies from 1 MeV down to 30 keV, with mean errors rising to between 3% and 6% at 10 keV, indicating that the method is unbiased when measurement and calibration phantom geometries are matched. Reconstruction with FBP and AM algorithms conferred similar mean pDECT accuracy. However, single-voxel pDECT estimates reconstructed on a 1 × 1 × 3 mm{sup 3} grid are shown to be highly sensitive to reconstructed image uncertainty; in some cases pDECT attenuation coefficient estimates exhibited standard deviations on the order of 20% around the mean. Reconstruction with the statistical AM algorithm led to standard deviations roughly 40% to 60% less than FBP reconstruction. Additional tin filtration of the high energy beam exhibits similar pDECT estimation accuracy as the unfiltered beam, even when scanning with only 25% of the dose. Using the law of propagated uncertainty, low Z materials are found to be more sensitive to image reconstruction errors than high Z materials. Furthermore, it is estimated that reconstructed CT image uncertainty must be limited to less than 0.25% to achieve a target linear-attenuation coefficient estimation uncertainty of 3% at 28 keV. Conclusions: That pDECT supports mean linear attenuation coefficient measurement accuracies of 1% of reference values for energies greater than 30 keV is encouraging. However, the sensitivity of the pDECT measurements to noise and systematic errors in reconstructed CT images warrants further investigation in more complex phantom geometries. The investigated statistical reconstruction algorithm, AM, reduced random measurement uncertainty relative to FBP owing to improved noise performance. These early results also support efforts to increase DE spectral separation, which can further reduce the pDECT sensitivity to measurement uncertainty.
Miller, J.D.; Conner, C.C.
1993-11-01T23:59:59.000Z
At the request of the US Department of Housing and Urban Development (HUD), the Pacific Northwest Laboratory estimated the material, labor, and operating costs for ventilation equipment needed for compliance with HUD`s proposed revision to the ventilation standard for manufactured housing. This was intended to bound the financial impacts of the ventilation standard revision. Researchers evaluated five possible prototype ventilation systems that met the proposed ventilation requirements. Of those five, two systems were determined to be the most likely used by housing manufacturers: System 1 combines a fresh air duct with the existing central forced-air system to supply and circulate fresh air to conditioned spaces. System 2 uses a separate exhaust fan to remove air from the manufactured home. The estimated material and labor costs for these two systems range from $200 to $300 per home. Annual operating costs for the two ventilation systems were estimated for 20 US cities. The estimated operating costs for System 1 ranged from $55/year in Las Vegas, Nevada, to $83/year in Bismarck, North Dakota. Operating costs for System 2 ranged from a low of $35/year in Las Vegas to $63/year in Bismarck. Thus, HUD`s proposed increase in ventilation requirements will add less than $100/year to the energy cost of a manufactured home.
Demonstration Integrated Knowledge-Based System for Estimating Human Error Probabilities
Auflick, Jack L.
1999-04-21T23:59:59.000Z
Human Reliability Analysis (HRA) is currently comprised of at least 40 different methods that are used to analyze, predict, and evaluate human performance in probabilistic terms. Systematic HRAs allow analysts to examine human-machine relationships, identify error-likely situations, and provide estimates of relative frequencies for human errors on critical tasks, highlighting the most beneficial areas for system improvements. Unfortunately, each of HRA's methods has a different philosophical approach, thereby producing estimates of human error probabilities (HEPs) that area better or worse match to the error likely situation of interest. Poor selection of methodology, or the improper application of techniques can produce invalid HEP estimates, where that erroneous estimation of potential human failure could have potentially severe consequences in terms of the estimated occurrence of injury, death, and/or property damage.
Dual Lindstedt series and KAM theorem
Marco Frasca
2009-09-09T23:59:59.000Z
We prove that exists a Lindstedt series that holds when a Hamiltonian is driven by a perturbation going to infinity. This series appears to be dual to a standard Lindstedt series as it can be obtained by interchanging the role of the perturbation and the unperturbed system. The existence of this dual series implies that a dual KAM theorem holds and, when a leading order Hamiltonian exists that is non degenerate, the effect of tori reforming can be observed with a system passing from regular motion to fully developed chaos and back to regular motion with the reappearance of invariant tori. We apply these results to a perturbed harmonic oscillator proving numerically the appearance of tori reforming. Tori reforming appears as an effect limiting chaotic behavior to a finite range of parameter space of some Hamiltonian systems. Dual KAM theorem, as proved here, applies when the perturbation, combined with a kinetic term, provides again an integrable system.
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications for transportation. Fuel cell systems will have to be cost-competitive with conventional and advanced vehicle cell vehicles have the potential to eliminate the need for oil in the transportation sector. Fuel cell
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications vehicles offer an environmentally clean and energy-secure transportation pathway. Fuel cell systems number of vehicles it represents, DOE has established detailed cost targets for automotive fuel cell
Kalman filtering with unknown inputs via optimal state estimation of singular systems
Paris-Sud XI, Université de
1 Kalman filtering with unknown inputs via optimal state estimation of singular systems M. DAROUACH de Lorraine, 54400 COSNES ET ROMAIN, FRANCE A new method for designing a Kalman filter for linear the Kalman filter, it is generally assumed that all system parameters, noise covariances, and inputs
ESTIMATION OF DELAY PROPAGATION IN THE NATIONAL AVIATION SYSTEM USING BAYESIAN NETWORKS
Laskey, Kathryn Blackmond
and mitigating delays is a major long-term objective of the Federal Aviation Administration (FAA). As demand1 ESTIMATION OF DELAY PROPAGATION IN THE NATIONAL AVIATION SYSTEM USING BAYESIAN NETWORKS Ning Xu creates major problems in the current aviation system. Methods are needed to analyze the manner in which
J. Differential Equations 190 (2003) 466503 Secular growth estimates for hyperbolic systems
Lannes, David
-scales BKW expansions for nonlinear hyperbolic systems. This model problem consists in studying the growth Keywords: Secular growth; Hyperbolic systems; BKW expansions; Interaction of waves; Strichartz estimates 1 BKW expansions. It consists in the growth in the ``fast'' variables of the profiles used
A Sparse Representation Approach to Online Estimation of Power System Distribution Factors
Liberzon, Daniel
, constructed from the transmission network, line parameters, and historical and forecasted power generation.g., a transmission line or generator), a condition known as N-1 security [2]. Using an up-to- date system model1 A Sparse Representation Approach to Online Estimation of Power System Distribution Factors Yu
Estimation of thermo-hydrodynamic parameters in energy production systems using non-stationary
Paris-Sud XI, Université de
. The construction of such systems, as well as the operating conditions, impose the use of non-intrusive techniques of the propagation times. Keywords: Non-intrusive measurement, ultrasounds, temperature and flow rate estimation by the fact that it must work while the system is on, and without affecting its functioning. A non-intrusive
A nonlinear observer to estimate unknown parameters during the synchronization of chaotic systems
L. Torres
2014-06-20T23:59:59.000Z
This paper proposes an Extended-Kalman-Filter-like observer for parameter estimation during synchronization of chaotic systems. The exponential stability of the observer is guaranteed by a persistent excitation condition. This approach is shown to be suitable for various classical chaotic systems and several simulations are presented accordingly.
Paris-Sud XI, Université de
in a large class of technical process like mechanical, electrical and chemical systems [3,17]. With regard of the proposed fault detection and estimation method is successfully applied to an electrical circuit. Keywords lead to significant performance degradation, serious system damages and even loss of human life
The ArvinMeritor Dual Mode Hybrid Powertrain (DMHP): Opportunities...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
ArvinMeritor Dual Mode Hybrid Powertrain (DMHP): Opportunities and Potential for Systems Optimization 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program...
Unfolding-based corrector estimates for a reaction-diffusion system predicting concrete corrosion
Fatima, Tasnim; Ptashnyk, Mariya
2011-01-01T23:59:59.000Z
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.
Ding Huanjun; Ducote, Justin L.; Molloi, Sabee [Department of Radiological Sciences, University of California, Irvine, California 92697 (United States)
2013-06-15T23:59:59.000Z
Purpose: To investigate the feasibility of a three-material compositional measurement of water, lipid, and protein content of breast tissue with dual kVp cone-beam computed tomography (CT) for diagnostic purposes. Methods: Simulations were performed on a flat panel-based computed tomography system with a dual kVp technique in order to guide the selection of experimental acquisition parameters. The expected errors induced by using the proposed calibration materials were also estimated by simulation. Twenty pairs of postmortem breast samples were imaged with a flat-panel based dual kVp cone-beam CT system, followed by image-based material decomposition using calibration data obtained from a three-material phantom consisting of water, vegetable oil, and polyoxymethylene plastic. The tissue samples were then chemically decomposed into their respective water, lipid, and protein contents after imaging to allow direct comparison with data from dual energy decomposition. Results: Guided by results from simulation, the beam energies for the dual kVp cone-beam CT system were selected to be 50 and 120 kVp with the mean glandular dose divided equally between each exposure. The simulation also suggested that the use of polyoxymethylene as the calibration material for the measurement of pure protein may introduce an error of -11.0%. However, the tissue decomposition experiments, which employed a calibration phantom made out of water, oil, and polyoxymethylene, exhibited strong correlation with data from the chemical analysis. The average root-mean-square percentage error for water, lipid, and protein contents was 3.58% as compared with chemical analysis. Conclusions: The results of this study suggest that the water, lipid, and protein contents can be accurately measured using dual kVp cone-beam CT. The tissue compositional information may improve the sensitivity and specificity for breast cancer diagnosis.
A BIM-based system for demolition and renovation waste estimation and planning
Cheng, Jack C.P., E-mail: cejcheng@ust.hk [Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology (Hong Kong); Ma, Lauren Y.H., E-mail: yingzi@ust.hk [Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology (Hong Kong)
2013-06-15T23:59:59.000Z
Highlights: ? We developed a waste estimation system leveraging the BIM technology. ? The system can calculate waste disposal charging fee and pick-up truck demand. ? We presented an example scenario demonstrating this system. ? Automatic, time-saving and wide applicability are the features of the system. - Abstract: Due to the rising worldwide awareness of green environment, both government and contractors have to consider effective construction and demolition (C and D) waste management practices. The last two decades have witnessed the growing importance of demolition and renovation (D and R) works and the growing amount of D and R waste disposed to landfills every day, especially in developed cities like Hong Kong. Quantitative waste prediction is crucial for waste management. It can enable contractors to pinpoint critical waste generation processes and to plan waste control strategies. In addition, waste estimation could also facilitate some government waste management policies, such as the waste disposal charging scheme in Hong Kong. Currently, tools that can accurately and conveniently estimate the amount of waste from construction, renovation, and demolition projects are lacking. In the light of this research gap, this paper presents a building information modeling (BIM) based system that we have developed for estimation and planning of D and R waste. BIM allows multi-disciplinary information to be superimposed within one digital building model. Our system can extract material and volume information through the BIM model and integrate the information for detailed waste estimation and planning. Waste recycling and reuse are also considered in our system. Extracted material information can be provided to recyclers before demolition or renovation to make recycling stage more cooperative and more efficient. Pick-up truck requirements and waste disposal charging fee for different waste facilities will also be predicted through our system. The results could provide alerts to contractors ahead of time at project planning stage. This paper also presents an example scenario with a 47-floor residential building in Hong Kong to demonstrate our D and R waste estimation and planning system. As the BIM technology has been increasingly adopted in the architectural, engineering and construction industry and digital building information models will likely to be available for most buildings (including historical buildings) in the future, our system can be used in various demolition and renovation projects and be extended to facilitate project control.
Mass Production Cost Estimation of Direct H2 PEM Fuel Cell Systems for
1 Mass Production Cost Estimation of Direct H2 PEM Fuel Cell Systems for Transportation (2012), annually updated costs analyses will be conducted for PEM fuel cell passenger buses as well to eliminate the need for oil in the transportation sector. Fuel cell vehicles can operate on hydrogen, which
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for
Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for Automotive Applications: 2010 Update fuel cell vehicles have the potential to eliminate the need for oil in the transportation sector. Fuel, and biomass. Thus, fuel cell vehicles offer an environmentally clean and energysecure transportation pathway
seari.mit.edu 2009 Massachusetts Institute of Technology 1 Better Early Estimation of Human Systems
de Weck, Olivier L.
WWII #12;seari.mit.edu © 2009 Massachusetts Institute of Technology 4 Why Measure SE/HSI Cost? Aircraft of Technology 9 Disconnect Between SE/PM Estimate and Life Cycle Cost "Life Cycle Cost of Surface Combatants.mit.edu © 2009 Massachusetts Institute of Technology 10 Comparison of System Life Cycle Costs Surface Combatants
Paris-Sud XI, UniversitĂ© de
The Surface Energy Balance System (SEBS) for estimation of turbulent heat fluxes 85 Hydrology and Earth System Sciences, 6(1), 85Â99 (2002) Â© EGS The Surface Energy Balance System (SEBS) for estimation, The Netherlands Email: B.su@Alterra.wag-ur.nl Abstract A Surface Energy Balance System (SEBS) is proposed
Nexant Inc.
2006-05-01T23:59:59.000Z
This deliverable is the Final Report for Task 1, Cost Estimates of Small Modular Systems, as part of NREL Award ACO-5-44027, ''Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup and Oxygen Separation Equipment''. Subtask 1.1 looked into processes and technologies that have been commercially built at both large and small scales, with three technologies, Fluidized Catalytic Cracking (FCC) of refinery gas oil, Steam Methane Reforming (SMR) of Natural Gas, and Natural Gas Liquids (NGL) Expanders, chosen for further investigation. These technologies were chosen due to their applicability relative to other technologies being considered by NREL for future commercial applications, such as indirect gasification and fluidized bed tar cracking. Research in this subject is driven by an interest in the impact that scaling has on the cost and major process unit designs for commercial technologies. Conclusions from the evaluations performed could be applied to other technologies being considered for modular or skid-mounted applications.
Adaptive feedforward of estimated ripple improves the closed loop system performance significantly
Kwon, S.; Regan, A.; Wang, Y.M.; Rohlev, T.
1998-12-31T23:59:59.000Z
The Low Energy Demonstration Accelerator (LEDA) being constructed at Los Alamos National Laboratory will serve as the prototype for the low energy section of Acceleration Production of Tritium (APT) accelerator. This paper addresses the problem of LLRF control system for LEDA. The authors propose an estimator of the ripple and its time derivative and a control law which is based on PID control and adaptive feedforward of estimated ripple. The control law reduces the effect of the deterministic cathode ripple that is due to high voltage power supply and achieves tracking of desired set points.
Quantitative Cyber Risk Reduction Estimation Methodology for a Small Scada Control System
Miles A. McQueen; Wayne F. Boyer; Mark A. Flynn; George A. Beitel
2006-01-01T23:59:59.000Z
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.
Switchover software reliability estimate for Paducah Freezer/Sublimer computer systems
Flanagan, D.M.; Davis, J.N.
1993-04-01T23:59:59.000Z
K-25 Engineering Division purchased a series of redundant computer systems and developed software for the purpose of providing continuous process monitoring and control for the Freezer/Sublimer equipment in the gaseous diffusion process at the Paducah Gaseous Diffusion Plant. The application software is loaded on two central processing units (CPU) so that in the event of a failure of the primary unit, the processing can switch to the backup unit and continue processing without error. It is the purpose of this document to demonstrate the reliability of this system with respect to its ability to switch properly between redundant CPU. The total reliability estimation problem -- which considers the computer hardware, the operating system software, and the application software -- has been reduced to one that considers only the application software directly involved in the switchover process. Estimates are provided for software reliability and the testing coverage. Software and hardware reliability models and reliability growth models are considered in addition to Bayesian approaches.
Methodology for Estimating Solar Potential on Multiple Building Rooftops for Photovoltaic Systems
Kodysh, Jeffrey B [ORNL; Omitaomu, Olufemi A [ORNL; Bhaduri, Budhendra L [ORNL; Neish, Bradley S [ORNL
2013-01-01T23:59:59.000Z
In this paper, a methodology for estimating solar potential on multiple building rooftops is presented. The objective of this methodology is to estimate the daily or monthly solar radiation potential on individual buildings in a city/region using Light Detection and Ranging (LiDAR) data and a geographic information system (GIS) approach. Conceptually, the methodology is based on the upward-looking hemispherical viewshed algorithm, but applied using an area-based modeling approach. The methodology considers input parameters, such as surface orientation, shadowing effect, elevation, and atmospheric conditions, that influence solar intensity on the earth s surface. The methodology has been implemented for some 212,000 buildings in Knox County, Tennessee, USA. Based on the results obtained, the methodology seems to be adequate for estimating solar radiation on multiple building rooftops. The use of LiDAR data improves the radiation potential estimates in terms of the model predictive error and the spatial pattern of the model outputs. This methodology could help cities/regions interested in sustainable projects to quickly identify buildings with higher potentials for roof-mounted photovoltaic systems.
Cost estimates for near-term depolyment of advanced traffic management systems. Final report
Stevens, S.S.; Chin, S.M.
1993-02-15T23:59:59.000Z
The objective of this study is to provide cost est engineering, design, installation, operation and maintenance of Advanced Traffic Management Systems (ATMS) in the largest 75 metropolitan areas in the United States. This report gives estimates for deployment costs for ATMS in the next five years, subject to the qualifications and caveats set out in following paragraphs. The report considers infrastructure components required to realize fully a functional ATMS over each of two highway networks (as discussed in the Section describing our general assumptions) under each of the four architectures identified in the MITRE Intelligent Vehicle Highway Systems (IVHS) Architecture studies. The architectures are summarized in this report in Table 2. Estimates are given for eight combinations of highway networks and architectures. We estimate that it will cost between $8.5 Billion (minimal network) and $26 Billion (augmented network) to proceed immediately with deployment of ATMS in the largest 75 metropolitan areas. Costs are given in 1992 dollars, and are not adjusted for future inflation. Our estimates are based partially on completed project costs, which have been adjusted to 1992 dollars. We assume that a particular architecture will be chosen; projected costs are broken by architecture.
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.
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.
Boyer, Edmond
of embedded systems such as MPSoC, ASIC. Facing this issue, designers should calculate and optimize the power adopted. These low level power estimation tools are however inconvenient to manage the architectureVirtual Platform for Embedded System Power Estimation Santhosh Kumar RETHINAGIRI, Rabie Ben
Gershgorin, B. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States); Harlim, J. [Department of Mathematics, North Carolina State University, NC 27695 (United States)], E-mail: jharlim@ncsu.edu; Majda, A.J. [Department of Mathematics and Center for Atmosphere and Ocean Science, Courant Institute of Mathematical Sciences, New York University, NY 10012 (United States)
2010-01-01T23:59:59.000Z
The filtering and predictive skill for turbulent signals is often limited by the lack of information about the true dynamics of the system and by our inability to resolve the assumed dynamics with sufficiently high resolution using the current computing power. The standard approach is to use a simple yet rich family of constant parameters to account for model errors through parameterization. This approach can have significant skill by fitting the parameters to some statistical feature of the true signal; however in the context of real-time prediction, such a strategy performs poorly when intermittent transitions to instability occur. Alternatively, we need a set of dynamic parameters. One strategy for estimating parameters on the fly is a stochastic parameter estimation through partial observations of the true signal. In this paper, we extend our newly developed stochastic parameter estimation strategy, the Stochastic Parameterization Extended Kalman Filter (SPEKF), to filtering sparsely observed spatially extended turbulent systems which exhibit abrupt stability transition from time to time despite a stable average behavior. For our primary numerical example, we consider a turbulent system of externally forced barotropic Rossby waves with instability introduced through intermittent negative damping. We find high filtering skill of SPEKF applied to this toy model even in the case of very sparse observations (with only 15 out of the 105 grid points observed) and with unspecified external forcing and damping. Additive and multiplicative bias corrections are used to learn the unknown features of the true dynamics from observations. We also present a comprehensive study of predictive skill in the one-mode context including the robustness toward variation of stochastic parameters, imperfect initial conditions and finite ensemble effect. Furthermore, the proposed stochastic parameter estimation scheme applied to the same spatially extended Rossby wave system demonstrates high predictive skill, comparable with the skill of the perfect model for a duration of many eddy turnover times especially in the unstable regime.
Brooks, JoAnn M.
Systems engineering projects that support government enterprises face substantial challenges due to demands from diverse stakeholders and rapidly changing technologies. In this paper, we present findings from the analysis ...
Chen, H.W. (Los Alamos National Lab., NM (United States). Biophysics Group M715)
1995-01-01T23:59:59.000Z
Structural classification and parameter estimation (SCPE) methods are used for studying single-input single-output (SISO) parallel linear-nonlinear-linear (LNL), linear-nonlinear (LN), and nonlinear-linear (NL) system models from input-output (I-O) measurements. The uniqueness of the I-O mappings (see the definition of the I-O mapping in Section 3-A) of some model structures is discussed. The uniqueness of the I-O mappings (see the definition of the I-O mapping in Section 3-A) of some model structures is discussed. The uniqueness of I-O mappings of different models tells them in what conditions different model structures can be differentiated from one another. Parameter uniqueness of the I-O mapping of a given structural model is also discussed, which tells the authors in what conditions a given model's parameters can be uniquely estimated from I-O measurements. These methods are then generalized so that they can be used to study single-input multi-output (SIMO), multi-input single-output (MISO), as well as multi-input multi-output (MIMO) nonlinear system models. Parameter estimation of the two-input single-output nonlinear system model (denoted as the 2f-structure in 2 cited references), which was left unsolved previously, can now be obtained using the newly derived algorithms. Applications of SCPE methods for modeling visual cortical neurons, system fault detection, modeling and identification of communication networks, biological systems, and natural and artificial neural networks are also discussed. The feasibility of these methods is demonstrated using simulated examples. SCPE methods presented in this paper can be further developed to study more complicated block-structures models, and will therefore have future potential for modeling and identifying highly complex multi-input multi-output nonlinear systems.
Design of Dual-Output Alternators With Switched-Mode Rectification
Hassan, Gimba
The push to introduce dual-voltage (42 V/14 V) automotive electrical systems necessitates power generation solutions capable of supplying power to multiple outputs. A number of approaches for implementing dual-voltage ...
Lead Coolant Test Facility Systems Design, Thermal Hydraulic Analysis and Cost Estimate
Soli Khericha; Edwin Harvego; John Svoboda; Ryan Dalling
2012-01-01T23:59:59.000Z
The Idaho National Laboratory prepared a preliminary technical and functional requirements (T&FR), thermal hydraulic design and cost estimate for a lead coolant test facility. The purpose of this small scale facility is to simulate lead coolant fast reactor (LFR) coolant flow in an open lattice geometry core using seven electrical rods and liquid lead or lead-bismuth eutectic coolant. Based on review of current world lead or lead-bismuth test facilities and research needs listed in the Generation IV Roadmap, five broad areas of requirements were identified as listed: (1) Develop and Demonstrate Feasibility of Submerged Heat Exchanger; (2) Develop and Demonstrate Open-lattice Flow in Electrically Heated Core; (3) Develop and Demonstrate Chemistry Control; (4) Demonstrate Safe Operation; and (5) Provision for Future Testing. This paper discusses the preliminary design of systems, thermal hydraulic analysis, and simplified cost estimate. The facility thermal hydraulic design is based on the maximum simulated core power using seven electrical heater rods of 420 kW; average linear heat generation rate of 300 W/cm. The core inlet temperature for liquid lead or Pb/Bi eutectic is 4200 C. The design includes approximately seventy-five data measurements such as pressure, temperature, and flow rates. The preliminary estimated cost of construction of the facility is $3.7M (in 2006 $). It is also estimated that the facility will require two years to be constructed and ready for operation.
Pineda Porras, Omar Andrey [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
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.
Gering, Kevin L.
2013-06-18T23:59:59.000Z
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.
Millimeter-Wave Concurrent Dual-Band BiCMOS RFIC Transmitter for Radar and Communication Systems
Huynh, Cuong Phu Minh 1976-
2012-11-21T23:59:59.000Z
like to specially thank him for bringing me to his research group and giving me faith; hence a comfortableness in doing the research. The academic lessons I have learned from his courses and weekly research meetings have been turning... inspirations to me for new ideas which significantly improve RFIC circuit and system performances, and for the definite shape of the research in this dissertation. I would like to thank him for kindly letting me have the freedom in searching new things...
Bolding, M. Chad
DUAL EMPLOYMENT REVISED SCHEDULE REQUEST NAME: _______________________ DUAL EMPLOYMENT DATES: ____________________ TO ______________________ TIMES: __________________ AM SCHEDULE. IN ACCORDANCE WITH THE CLEMSON UNIVERSITY DUAL EMPLOYMENT POLICY, ALL HOURS MISSED WHILE
Liu, M.; Claridge, D. E.
1998-01-01T23:59:59.000Z
, is the fan power consumption, cfm is the air flow rate, and cfr&, is the designed air flow rate. In the base cases, the cold deck temperature is 55°F regardless of the ambient temperature. The hot deck temperature varies from 1 10°F to 75°F when... the ambient temperature increases from 40°F to 75OF. When the ambient temperature is lower than 40°F, the hot deck temperature remains at 1 10°F. Figure 5: Cold and Hot Deck Temperature Versus the Ambient Temperature for Base Case or Normal VAV System...
The Steam System Assessment Tool (SSAT): Estimating Steam System Energy, Cost, and Emission Savings
Wright, A.; Bealing, C.; Eastwood, A.; Tainsh, R.; Hahn, G.; Harrell, G.
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...
Sjoreen, A.L. [Oak Ridge National Lab., TN (United States); Sykes, R.I. [Titan/ARAP, Princeton, NJ (United States)
1995-12-31T23:59:59.000Z
HASCAL (Hazard Assessment System for Consequence Analysis), Version 0.1, is being developed to support analysis of radiological incidents anywhere in the world for Defense Nuclear Agency. HASCAL is a component of HPAC (Hazard Prediction and Assessment Capability), a comprehensive nuclear, biological, and chemical hazard effects planning and forecasting modeling system. HASCAL estimates the amount of radioactivity released, its atmospheric transport, and the resulting radiological doses for a variety of radiological incident scenarios. HASCAL is based on RASCAL (Radiological assessment System Consquence Analysis), which was developed for US NRC for analysis of US power reactor accidents. HASCAL contains addtions of an atmospheric transport model (SCIPUFF) and of a database of all power reactors in the world. Enhancements to HASCAL are planned.
Cost estimation of HVDC transmission system of Bangka’s NPP candidates
Liun, Edwaren, E-mail: edwaren@batan.go.id; Suparman, E-mail: edwaren@batan.go.id [Centre for Nuclear Energy Development, National Nuclear Energy Agency of Indonesia (Indonesia)
2014-09-30T23:59:59.000Z
Regarding nuclear power plant development in Bangka Island, it can be estimated that produced power will be oversupply for the Bangka Island and needs to transmit to Sumatra or Java Island. The distance between the regions or islands causing considerable loss of power in transmission by alternating current, and a wide range of technical and economical issues. The objective of this paper addresses to economics analysis of direct current transmission system to overcome those technical problem. Direct current transmission has a stable characteristic, so that the power delivery from Bangka to Sumatra or Java in a large scale efficiently and reliably can be done. HVDC system costs depend on the power capacity applied to the system and length of the transmission line in addition to other variables that may be different.
A. Ahmed Al-Rubaiee; Ahmed Jumaah
2013-05-25T23:59:59.000Z
In this work the estimation of the lateral distribution function in Extensive Air showers was performed by using a system for air shower simulations which is called AIRES version 2.6 for different hadronic models like (QGSJET99, SIBYLL and SIBYLL1.6). The simulation was fulfilled in the high energy range (10^15-10^19 eV) for different primary particles like (gamma, protons and iron nuclei) for vertical showers. This simulation can be used to reconstruct the type and energy of the particle that generated Extensive Air showers for charged particles that registered with different arrays.
Hylton, T.D.
2000-09-01T23:59:59.000Z
The U.S. Department of Energy (DOE) has millions of gallons of radioactive liquid and sludge wastes stored in underground tanks at several of its sites. In order to comply with various regulations and to circumvent potential problems associated with tank integrity, these wastes must be retrieved from the tanks, transferred to treatment facilities (or other storage locations), and processed to stable waste forms. The sludge wastes will typically be mobilized by some mechanical means (e.g., mixer pump, submerged jet) and mixed with the respective supernatants to create slurries that can be transferred by pipeline to the desired destination. Depending on the DOE site, these slurries may be transferred up to six miles. Since the wastes are radioactive, it is critically important for the transfers to be made without plugging a pipeline. To reduce such a risk, the relevant properties of the slurry (e.g., density, suspended solids concentration, viscosity, and particle size distribution) should be determined to be within acceptable limits prior to transfer. These properties should also be continuously monitored and controlled within specified limits while the transfer is in progress. The baseline method for determining the transport properties of slurries involves sampling and analysis; however, this method is time-consuming, and costly, and it does not provide real-time information. In addition, personnel who collect and analyze the samples are exposed to radiation. It is also questionable as to whether a laboratory analyst can obtain representative aliquots from the sample jar for these solid-liquid mixtures. The alternative method for determining the transport properties is in-line analysis. An in-line instrument is one that is connected to the process, analyzes the slurry as it flows through or by the instrument, and provides the results within seconds. This instrument can provide immediate feedback to operators so that, when necessary, the operators can respond quickly to counteract conditions that could lead to pipeline pluggage (e.g., backflushing the pipeline with water). One of the highest priorities is to determine the concentration of suspended solids in each of the slurries. In the project described in this report, two Coriolis meters were used simultaneously to create a suspended solids monitoring system that would provide accurate results with high precision. One Coriolis meter was used to measure the density of the slurry, while the other meter was used to measure the density of the carrier fluid (i.e., after filtration to remove the solid particles). The suspended solids concentration was then calculated from the density relationships between the slurry, the carrier fluid, and the dry solid particles. The latter density was determined by laboratory analysis and was assumed to be constant throughout the periods that grab samples were collected.
System and method for motor speed estimation of an electric motor
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
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.
Coupled dual loop absorption heat pump
Sarkisian, Paul H. (Watertown, MA); Reimann, Robert C. (Lafayette, NY); Biermann, Wendell J. (Fayetteville, NY)
1985-01-01T23:59:59.000Z
A coupled dual loop absorption system which utilizes two separate complete loops. Each individual loop operates at three temperatures and two pressures. This low temperature loop absorber and condenser are thermally coupled to the high temperature loop evaporator, and the high temperature loop condenser and absorber are thermally coupled to the low temperature generator.
Dyer, R.S.; Barnes, E. [U.S. Environmental Protection Agency, Washington D.C. (United States); Snipes, R.L. [Oak Ridge National Laboratory, TN (United States); Guskov, V.; Makarchuk, T. [Special Mechanical Engineering Design Bureau (KBSM), St. Petersburg (Russian Federation)
2007-07-01T23:59:59.000Z
Russia, stores large quantities of spent nuclear fuel (SNF) from submarine and ice-breaker nuclear powered naval vessels. This high-level radioactive material presents a significant threat to the Arctic and marine environments. Much of the SNF from decommissioned Russian nuclear submarines is stored either onboard the submarines or in floating storage vessels in Northwest and Far East Russia. Some of the SNF is damaged, stored in an unstable condition, or of a type that cannot currently be reprocessed. In many cases, the existing Russian transport infrastructure and reprocessing facilities cannot meet the requirements for moving and reprocessing all of this fuel from remote locations. Additional transport and storage options are required. Some of the existing storage facilities being used in Russia do not meet health and safety and physical security requirements. The U.S. has assisted Russia in the development of a new dual-purpose metal-concrete transport and storage cask (TUK-108/1) for their military SNF and assisted them in building several new facilities for off-loading submarine SNF and storing these TUK-108/1 casks. These efforts have reduced the technical, ecological, and security challenges for removal, handling, interim storage, and shipment of this submarine fuel. Currently, Russian licensing limits the storage period of the TUK-108/1 casks to no more than two years before the fuel must be shipped for reprocessing. In order to extend this licensed storage period, a system is required to condition the casks by removing residual water and creating an inert storage environment by backfilling the internal canisters with a noble gas such as argon. The U.S. has assisted Russia in the development of a mobile cask conditioning system for the TUK-108/1 cask. This new conditioning system allows the TUK 108/1 casks to be stored for up to five years after which the license may be considered for renewal for an additional five years or the fuel will be shipped to 'Mayak' for reprocessing. The U.S. Environmental Protection Agency (EPA), in cooperation with the U.S. DOD Office of Cooperative Threat Reduction (CTR), and the DOE's ORNL, along with the Norwegian Defense Research Establishment, worked closely with the Ministry of Defense and the Ministry of Atomic Energy of the Russian Federation (RF) to develop an improved integrated management system for interim storage of military SNF in Russia. The initial Project activities included: (1) development of a prototype dual-purpose, metal-concrete 40-ton cask for both the transport and interim storage of RF SNF, and (2) development of the first transshipment/interim storage facility for these casks in Murmansk. The U.S. has continued support to the project by assisting the RF with the development of the first mobile system that provides internal conditioning for the TUK-108/1 casks to allow them to be stored for longer than the current licensing period of two years. Development of the prototype TUK-108/1 cask was completed in December 2000 under the Arctic Military Environmental Cooperation (AMEC) Program. This was the first metal-concrete cask developed, licensed, and produced in the RF for both the transportation and storage of SNF from decommissioned submarines. These casks are currently being serially produced in NW Russia and 108 casks have been produced to date. Russia is using these casks for the transport and interim storage of military SNF from decommissioned nuclear submarines at naval installations in the Arctic and Far East in conformance with the Strategic Arms Reduction Treaty (START II). The design, construction, and commissioning of the first transshipment/interim storage facility in the RF was completed and ready for full operation in September 2003. Because of the RF government reorganization and changing regulations for spent fuel storage facilities, the storage facility at Murmansk was not fully licensed for operation until December 2005. The RF has reported that the facility is now fully operational. The TUK-108/1 SNF transport and storage casks were designed
Effect of squeezing on parameter estimation of gravitational waves emitted by compact binary systems
Ryan Lynch; Salvatore Vitale; Lisa Barsotti; Matthew Evans; Sheila Dwyer
2014-11-06T23:59:59.000Z
The LIGO gravitational wave (GW) detectors will begin collecting data in 2015, with Virgo following shortly after. The use of squeezing has been proposed as a way to reduce the quantum noise without increasing the laser power, and has been successfully tested at one of the LIGO sites and at GEO in Germany. When used in Advanced LIGO without a filter cavity, the squeezer improves the performances of detectors above about 100 Hz, at the cost of a higher noise floor in the low frequency regime. Frequency-dependent squeezing, on the other hand, will lower the noise floor throughout the entire band. Squeezing technology will have a twofold impact: it will change the number of expected detections and it will impact the quality of parameter estimation for the detected signals. In this work we consider three different GW detector networks, each utilizing a different type of squeezer, all corresponding to plausible implementations. Using LALInference, a powerful Monte Carlo parameter estimation algorithm, we study how each of these networks estimates the parameters of GW signals emitted by compact binary systems, and compare the results with a baseline advanced LIGO-Virgo network. We find that, even in its simplest implementation, squeezing has a large positive impact: the sky error area of detected signals will shrink by about 30% on average, increasing the chances of finding an electromagnetic counterpart to the GW detection. Similarly, we find that the measurability of tidal deformability parameters for neutron stars in binaries increases by about 30%, which could aid in determining the equation of state of neutron stars. The degradation in the measurement of the chirp mass, as a result of the higher low-frequency noise, is shown to be negligible when compared to systematic errors.
Snapshot metallicity estimate of resolved stellar systems through Lick Fe5270 diagnostic
Buzzoni, Alberto; Chavez, Miguel
2009-01-01T23:59:59.000Z
We outline a new method to derive a "snapshot" metallicity estimate of stellar systems (providing one resolves at least the brightest part of the CMD) just on the basis of low-resolution (i.e., 6-8A FWHM) spectroscopy of a small stellar sample. Our method relies on the Fe5270 Lick index measurements and takes advantage of the special behavior of this spectral feature, that reaches its maximum strength among the ubiquitous component of K-type giants. This makes the Fe5270(max} estimate a robust and model-independent tracer of cluster [Fe/H], being particularly insensitive to the age of the stellar population. A comparison of the Fe5270(max) distribution derived from globular and open clusters, as well as from the field giant population in the Galaxy disk, confirms a tight correlation of the index maximum vs. cluster [Fe/H] allover the entire metallicity range for stellar population with [Fe/H] >~ -2.0. Relying on a theoretical calibration of the feature, we trust to effectively infer cluster metallicity within...
Optimization of a dual acting, magnetically driven, linear actuator
Willerton, Justin Ryan
2002-01-01T23:59:59.000Z
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. ...
Stabilizing the dual inverted pendulum : a practical approach
Barton, Taylor Wallis
2008-01-01T23:59:59.000Z
A dual inverted pendulum system, consisting of two individual pendulums of different lengths on a single cart, was fully designed and implemented as a demonstration of classical control theory. This document contains an ...
Performance of Adaptive DualDropping ILUT Preconditioners in Semiconductor
Zhang, Jun
Performance of Adaptive DualDropping ILUT Preconditioners in Semiconductor Dopant Diffusion for iterative solution of sparse linear systems arising in semiconductor dopant diffusion modeling resolution, timestep in the adaptive ODE integrator and the problem physics. Key words: semiconductor TCAD
Teixeira, André; Sandberg, Henrik; Johansson, Karl H
2010-01-01T23:59:59.000Z
The electrical power network is a critical infrastructure in today's society, so its safe and reliable operation is of major concern. State estimators are commonly used in power networks, for example, to detect faulty equipment and to optimally route power flows. The estimators are often located in control centers, to which large numbers of measurements are sent over unencrypted communication channels. Therefore cyber security for state estimators becomes an important issue. In this paper we analyze the cyber security of state estimators in supervisory control and data acquisition (SCADA) for energy management systems (EMS) operating the power network. Current EMS state estimation algorithms have bad data detection (BDD) schemes to detect outliers in the measurement data. Such schemes are based on high measurement redundancy. Although these methods may detect a set of basic cyber attacks, they may fail in the presence of an intelligent attacker. We explore the latter by considering scenarios where stealthy de...
Dual-domain point diffraction interferometer
Naulleau, Patrick P. (5239 Miles Ave., Apt. A, Oakland, CA 94618); Goldberg, Kenneth Alan (1195 Keeler Ave., Berkeley, CA 94708)
2000-01-01T23:59:59.000Z
A hybrid spatial/temporal-domain point diffraction interferometer (referred to as the dual-domain PS/PDI) that is capable of suppressing the scattered-reference-light noise that hinders the conventional PS/PDI is provided. The dual-domain PS/PDI combines the separate noise-suppression capabilities of the widely-used phase-shifting and Fourier-transform fringe pattern analysis methods. The dual-domain PS/PDI relies on both a more restrictive implementation of the image plane PS/PDI mask and a new analysis method to be applied to the interferograms generated and recorded by the modified PS/PDI. The more restrictive PS/PDI mask guarantees the elimination of spatial-frequency crosstalk between the signal and the scattered-light noise arising from scattered-reference-light interfering with the test beam. The new dual-domain analysis method is then used to eliminate scattered-light noise arising from both the scattered-reference-light interfering with the test beam and the scattered-reference-light interfering with the "true" pinhole-diffracted reference light. The dual-domain analysis method has also been demonstrated to provide performance enhancement when using the non-optimized standard PS/PDI design. The dual-domain PS/PDI is essentially a three-tiered filtering system composed of lowpass spatial-filtering the test-beam electric field using the more restrictive PS/PDI mask, bandpass spatial-filtering the individual interferogram irradiance frames making up the phase-shifting series, and bandpass temporal-filtering the phase-shifting series as a whole.
Yao, Bin
Integrated Direct/Indirect Adaptive Robust Precision Control of Linear Motor Drive Systems The focus of the paper is on the synthesis of nonlinear adaptive robust controllers for precision linear control of linear motor drive systems but with an improved estimation model, in which accurate parameter
Bau, Domenico A.
an irrigated agricultural river-aquifer system using measurements of (i) nitrate concen- trationEstimating spatially-variable rate constants of denitrification in irrigated agricultural groundwater systems using an Ensemble Smoother Ryan T. Bailey , Domenico A. Baů, Timothy K. Gates Department
Bystroff, Chris
submitted to International Journal of Computer Vision June, 2002 The Dual-Bootstrap Iterative initial estimate. By contrast, the Dual-Bootstrap ICP algorithm only requires an initial estimate iteratively "bootstraps" both the region over which the model is accurate and the chosen transformation model
Bystroff, Chris
submitted to International Journal of Computer Vision June, 2002 The Dual-Bootstrap Iterative initial estimate. By contrast, the Dual-Bootstrap ICP algorithm only requires an initial estimate iteratively \\bootstraps" both the region over which the model is accurate and the chosen transformation model
Nina H. Amini; Zibo Miao; Yu Pan; Matthew R. James; Hideo Mabuchi
2015-01-19T23:59:59.000Z
The purpose of this paper is to study the problem of generalizing the Belavkin-Kalman filter to the case where the classical measurement signal is replaced by a fully quantum non-commutative output signal. We formulate a least mean squares estimation problem that involves a non-commutative system as the filter processing the non-commutative output signal. We solve this estimation problem within the framework of non-commutative probability. Also, we find the necessary and sufficient conditions which make these non-commutative estimators physically realizable.
Jitter Analysis: The dual-Dirac Model, RJ/DJ, and Q-Scale
Palermo, Sam
Jitter Analysis: The dual-Dirac Model, RJ/DJ, and Q-Scale White Paper #12;The dual-Dirac model is a tool for quickly estimating total jitter defined at a low bit error ratio, TJ(BER). The deterministic and random subcomponents of the jitter signal are separated within the context of the model to yield two
A Two-Stage Kalman Filter Approach for Robust and Real-Time Power System State Estimation
Zhang, Jinghe; Welch, Greg; Bishop, Gary; Huang, Zhenyu
2014-04-01T23:59:59.000Z
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.
Haymaker, R W; Haymaker, Richard W.; Matsuki, Takayuki
2005-01-01T23:59:59.000Z
We revisit the confinement problem in maximal Abelian gauge SU(2) gluodynamics as a dual superconductor through the study of the dual Abrikosov vortex. There are three effects that have not been included in previous studies. We employ a definition of flux that satisfies the exact Ward-Takahashi identity giving exact electric Maxwell equations for lattice averages. Second we modify the standard definition of magnetic current to give consistent magnetic Maxwell equations. Finally we point out that the dual Ginzburg-Landau-Higgs model is an oversimplification of the physics of the system because of the presence of significant electric currents. As a result we need a third parameter to describe the vortex in addition to the standard ones, i.e., the London penetration depth and the coherence length. Without a complete model at our disposal, we estimate the values of these three parameters for $\\beta = 2.5115$ on a $32^4$ lattice. As a digression, we also show that the truncation of monopoles to the percolating clu...
31.01.01.V1.04 SUPPLEMENTAL COMPENSATION AND DUAL EMPLOYMENT
31.01.01.V1.04 SUPPLEMENTAL COMPENSATION AND DUAL EMPLOYMENT Supplements System Policy 31 occasionally enter into additional employment within The Texas A&M University System (System) in which payments being made to the employee, and B. dual employment for on-going activities. In either situation
Improved proton computed tomography by dual modality image reconstruction
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, Jřrgen Breede Baltzer [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark)] [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark); Sřrensen, 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
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.
44 Market St - Refurbishment of a Dual Duct Building
Bannister, P.; Foo, G.
2013-01-01T23:59:59.000Z
Page 1 of 9 44 MARKET ST ? REFURBISHMENT OF A DUAL DUCT BUILDING ? ? DR PAUL BANNISTER Managing Director Exergy Australia Pty Ltd Canberra, ACT, Australia GRACE FOO Consultant Exergy Australia Pty Ltd Canberra, ACT, Australia ? ABSTRACT...-zone dual duct unit with a single supply fan and separate cooling and heating coils serving the retail bank and optometrist tenancies. AHU-6 (caf?) was a constant volume system equipped with cooling and heating coils. AHU-B1 (Australia Post on Basement...
Baldick, Ross
data detection. In this analysis, to make the problem manageable, we use the 1-norm to calculateIEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 16, NO. 2, MAY 2001 273 State Estimator Condition Number is related to available finite precision arithmetic. The more precision in the calculations, the higher
Jishan Fan; Fucai Li; Gen Nakamura
2014-07-24T23:59:59.000Z
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.
K East Basin sludge volume estimates for integrated water treatment system
Pitner, A.L.
1998-08-12T23:59:59.000Z
Estimates were made of the volume of sludge expected from Integrated Process Strategy (IPS) processing fuel elements and in the fuel storage canisters in K East Basin, These were based on visual observations of fuel element condition in the basin and laboratory measurements of canister sludge density. The estimates, made in early 1997, are reviewed and the basic assumptions used discussed.
Hoen, Ben
2013-01-01T23:59:59.000Z
of Photovoltaic Energy Systems on Residential Selling Pricesof photovoltaic (PV) energy systems on home sales prices.
GENERALIZED DUAL FACE ALGORITHM FOR LINEAR ...
2014-10-02T23:59:59.000Z
1991 Mathematics Subject Classification. Primary 90C05; Secondary 65K05. Key words and phrases. linear programming, dual level face, dual optimal face .
Mozhgan Mombeini; Ali Khaki Sedigh; Mohammad Ali Nekoui
2012-05-17T23:59:59.000Z
In this paper, a new approach to the problem of stabilizing a chaotic system is presented. In this regard, stabilization is done by sustaining chaotic properties of the system. Sustaining the chaotic properties has been mentioned to be of importance in some areas such as biological systems. The problem of stabilizing a chaotic singularly perturbed system will be addressed and a solution will be proposed based on the OGY (Ott, Grebogi and Yorke) methodology. For the OGY control, Poincare section of the system is defined on its slow manifold. The multi-time scale property of the singularly perturbed system is exploited to control the Poincare map with the slow scale time. Slow scale time is adaptively estimated using a parameter estimation technique. Control with slow time scale circumvents the need to observe the states. With this strategy, the system remains chaotic and chaos identification is possible with online calculation of lyapunov exponents. Using this strategy on ecological system improves their control in three aspects. First that for ecological systems sustaining the dynamical property is important to survival of them. Second it removes the necessity of insertion of control action in each sample time. And third it introduces the sufficient time for census.
Dasgupta, Dipankar
years of service OR at least 30 years of service) o Early Retirement (age 55 with at least 5 years TN Consolidated Retirement System (TCRS) Benefit Estimate Request If you are a member of TCRS and an employee at the University of Memphis, you may request an estimate of your retirement benefit by providing
A quantitative framework For large-scale model estimation and discrimination In systems biology
Eydgahi, Hoda
2013-01-01T23:59:59.000Z
Using models to simulate and analyze biological networks requires principled approaches to parameter estimation and model discrimination. We use Bayesian and Monte Carlo methods to recover the full probability distributions ...
Joint sequence estimation and synchronization using wavelet pulses in a communication system
Wannasakwong, Marisa
1994-01-01T23:59:59.000Z
A new kind of baseband pulse is introduced in a receiver using nonsynchronized uniform samples. The pulse is an orthonormal wavelet generated by a discrete filter. Its performance is examined by applying a sequence estimation and synchronization...
Estimation of Arrival-Departure Capacity Tradeoffs in Multi-Airport Systems
Balakrishnan, Hamsa
The accurate estimation of airport capacity is critical for the efficient planning of landing and takeoff operations, and the mitigation of congestion-induced delays. The analysis of tradeoffs between arrival and departure ...
Collins, Donovan (Donovan Scott)
2011-01-01T23:59:59.000Z
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 ...
Measurement calibration/tuning & topology processing in power system state estimation
Zhong, Shan
2005-02-17T23:59:59.000Z
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...
Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including a
Oliveira, Aurélio R. L.
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 interiorPrimal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including
Dobson, Ian
be better quantified and mitigated. The electric power infrastructure is vital in maintaining our society, and maintaining high reliability is especially important as the electric power infrastructure is being transformed of electric power systems. The average propagation of the simulated load shed data is estimated
Toward tsunami early warning system in Indonesia by using rapid rupture durations estimation
Madlazim [Physics Department, Faculty Mathematics and Sciences of Surabaya State University (UNESA) Jl. Ketintang, Surabaya 60231 (Indonesia)
2012-06-20T23:59:59.000Z
Indonesia has Indonesian Tsunami Early Warning System (Ina-TEWS) since 2008. The Ina-TEWS has used automatic processing on hypocenter; Mwp, Mw (mB) and Mj. If earthquake occurred in Ocean, depth < 70 km and magnitude > 7, then Ina-TEWS announce early warning that the earthquake can generate tsunami. However, the announcement of the Ina-TEWS is still not accuracy. Purposes of this research are to estimate earthquake rupture duration of large Indonesia earthquakes that occurred in Indian Ocean, Java, Timor sea, Banda sea, Arafura sea and Pasific ocean. We analyzed at least 330 vertical seismogram recorded by IRIS-DMC network using a direct procedure for rapid assessment of earthquake tsunami potential using simple measures on P-wave vertical seismograms on the velocity records, and the likelihood that the high-frequency, apparent rupture duration, T{sub dur}. T{sub dur} can be related to the critical parameters rupture length (L), depth (z), and shear modulus ({mu}) while T{sub dur} may be related to wide (W), slip (D), z or {mu}. Our analysis shows that the rupture duration has a stronger influence to generate tsunami than Mw and depth. The rupture duration gives more information on tsunami impact, Mo/{mu}, depth and size than Mw and other currently used discriminants. We show more information which known from the rupture durations. The longer rupture duration, the shallower source of the earthquake. For rupture duration greater than 50 s, the depth less than 50 km, Mw greater than 7, the longer rupture length, because T{sub dur} is proportional L and greater Mo/{mu}. Because Mo/{mu} is proportional L. So, with rupture duration information can be known information of the four parameters. We also suggest that tsunami potential is not directly related to the faulting type of source and for events that have rupture duration greater than 50 s, the earthquakes generated tsunami. With available real-time seismogram data, rapid calculation, rupture duration discriminant can be completed within 4-5 min after an earthquake occurs and thus can aid in effective, accuracy and reliable tsunami early warning for Indonesia region.
Johansson, Karl Henrik
Cyber Security Analysis of State Estimators in Electric Power Systems AndrÂ´e Teixeira, Saurabh Amin security of state estimators in Supervisory Control and Data Acquisition (SCADA) systems operating in power random outliers in the measurement data. Such schemes are based on high measurement redundancy. Although
On Dual Configurational Forces SHAOFAN LIj
Li, Shaofan
they provide the dual energymomentum tensor. Some previously unknown and yet interesting results in elasticity the configuration force (energymomentum tensor) P and the dual configuration force (dual energymomentum tensor) L energy momentum tensor (referred to as the dual energymomentum tensor in this j Corresponding author
Self-dual Maxwell field in 3D gravity with torsion
M. Blagojevi?; B. Cvetkovi?
2008-09-03T23:59:59.000Z
We study the system of self-dual Maxwell field coupled to 3D gravity with torsion, with Maxwell field modified by a topological mass term. General structure of the field equations reveals a new, dynamical role of the classical central charges, and gives a simple correspondence between self-dual solutions with torsion and their Riemannian counterparts. We construct two exact self-dual solutions, corresponding to the sectors with massless and massive Maxwell field, and calculate their conserved charges.
Phase Noise in MIMO Systems: Bayesian Cramer-Rao Bounds and Soft-Input Estimation
Nasir, Ali A; Mehrpouyan, Hani; Schober, Robert; Hua, Yingbo
2013-01-01T23:59:59.000Z
for a 4 4 MIMO system, the proposed soft-input EKF-EKSin MIMO Systems: Bayesian Cramér–Rao Bounds and Soft-Inputof a MIMO system employing the proposed soft-input EKF-EKS
Hoen, Ben
2013-01-01T23:59:59.000Z
No. DE-AC02-05CH11231. Do PV Systems Increase Residentialimpacts of photovoltaic (PV) energy systems on home salesthat existing homes with PV systems sold for a premium over
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
technology * 2015 projected technology 2 Determine costs for these 3 tech level Fuel Cell System Battery System Storage 2. Determine costs for these 3 tech level systems at 5...
Chopra, O. K.; Energy Technology
1994-10-05T23:59:59.000Z
This report presents a revision of the procedure and correlations presented earlier in NUREG/CR-4513, ANL-90/42 (June 1991) for predicting the change in mechanical properties of cast stainless steel components due to thermal aging during service in light water reactors at 280-330 C (535-625 F). The correlations presented in this report are based on an expanded data base and have been optimized with mechanical-property data on cast stainless steels aged up to {approx}58,000 h at 290-350 C (554-633 F). The correlations for estimating the change in tensile stress, including the Ramberg/Osgood parameters for strain hardening, are also described. The fracture toughness J-R curve, tensile stress, and Charpy-impact energy of aged cast stainless steels are estimated from known material information. Mechanical properties of a specific cast stainless steel are estimated from the extent and kinetics of thermal embrittlement. Embrittlement of cast stainless steels is characterized in terms of room-temperature Charpy-impact energy. The extent or degree of thermal embrittlement at 'saturation,' i.e., the minimum impact energy that can be achieved for a material after long-term aging, is determined from the chemical composition of the steel. Charpy-impact energy as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which are also determined from the chemical composition. The initial impact energy of the unaged steel is required for these estimations. Initial tensile flow stress is needed for estimating the flow stress of the aged material. The fracture toughness J-R curve for the material is then obtained by correlating room-temperature Charpy-impact energy with fracture toughness parameters. The values of JIC are determined from the estimated J-R curve and flow stress. A common 'predicted lower-bound' J-R curve for cast stainless steels of unknown chemical composition is also defined for a given grade of steel, range of ferrite content, and temperature. Examples of estimating mechanical properties of cast stainless steel components during reactor service are presented.
Methods for Estimation and Control of Linear Systems Driven by Cauchy Noises
Fernandez, Javier Huerta
2013-01-01T23:59:59.000Z
prediction optimal control for a scalar linear system withPrediction Optimal Control for a Scalar Linear System withsystems in modern stochastic optimal control, algorithms like the linear
Mudd, Michelle Leigh
1998-01-01T23:59:59.000Z
to closely evaluate its usefulness and practical application in such circumstances. One study in particular was conducted by NIOSH at the Big Bear Grocery Warehouse in Columbus, Ohio (1993). During this study, the Oxylog system was used to collect V 0... in industry is a simple, practical, and more readily acceptable method that accurately estimates the oxygen consumption based on the heart rate. Oxygen consumption measuring devices may present several uncontrollable physical factors into the situation...
Methodology for Estimating ton-Miles of Goods Movements for U.S. Freight Mulitimodal Network System
Oliveira Neto, Francisco Moraes [ORNL] [ORNL; Chin, Shih-Miao [ORNL] [ORNL; Hwang, Ho-Ling [ORNL] [ORNL
2013-01-01T23:59:59.000Z
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.
Dual Rater Competency Assessment FAQ
Broader source: Energy.gov [DOE]
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...
Using graph theory to resolve state estimator issues faced by deregulated power systems
Lei, Jiansheng
2009-05-15T23:59:59.000Z
) Jiansheng Lei, B.S., Tsinghua University, Beijing, China; M.S., Tsinghua University, Beijing, China Chair of Advisory Committee: Dr. Garng M. Huang Power industry is undergoing a transition from the traditional regulated environment to the competitive... even under a contingency.............................................................................................1 B. Challenge 2: Run state estimator over a grid with extremely large size ...2 1.2 Topic 1: Network observability...
Estimation of fracture toughness of cast stainless steels during thermal aging in LWR systems
Chopra, O.K. (Argonne National Lab., IL (USA))
1991-06-01T23:59:59.000Z
A procedure and correlations are presented for predicting the change in fracture toughness of cast stainless steel components due to thermal aging during service in light water rectors (LWRs) at 280--330{degrees}C (535--625{degrees}F). The fracture toughness J-R curve and Charpy-impact energy of aged cast stainless steels are estimated from known mineral in formation. Fracture toughness of a specific cast stainless steel is estimated from the extent and kinetics of thermal embrittlement. The extent of thermal embrittlement is characterized by the room-temperature normalized'' Charpy-impact energy. A correlation for the extent of embrittlement at saturation,'' i.e., the minimum impact energy that would be achieved for the material after long-term aging, is given in terms of a material parameter, {Phi}, which is determined from the chemical composition. The fracture toughness J-R curve for the material is then obtained from correlations between room-temperature Charpy-impact energy and fracture toughness parameters. Fracture toughness as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which is determined from chemical composition. A common lower-bound'' J-R curve for cast stainless steels with unknown chemical composition is also defined for a given material specification, ferrite content, and temperature. Examples for estimating impact strength and fracture toughness of cast stainless steel components during reactor service are describes. 24 refs., 39 figs., 2 tabs.
A Hybrid Estimation of Distribution Algorithm for CDMA Cellular System Design
Zhang, Qingfu
-stage hybrid approach built on estimation of distribution algorithms (EDAs), coupled with a K-means clustering-known K-means clustering and a simple local search algorithm. The first stage aims to find optimal or near, in comparison to SA. The rest of the paper is organized as follows. Section 2 describes the mathe- matical model
Estimating actual evapotranspiration for a coupled human environment system: sensitivity to drought
Hall, Sharon J.
2: CAP-LTER study area as seen by Landsat Figure 5: The S-ReSET model flow chart. 0 2 4 6 8 10 12 0 cycle and energy transport between the biosphere, atmosphere and hydrosphere. Quantifying actual ET (ETa Remote sensing can estimate ET as a residual of the energy balance: Friction Velocity Roughness Length
Dynamic State Estimation in Distributed Aircraft Electric Control Systems via Adaptive Submodularity
Murray, Richard M.
for the international space station, [10] for an aircraft electric system, and [7] for a marine vehicle power system industry signifies progress in the direction of more energy efficient vehicles. Electric systems are replac on electric power, the flight-criticality of an aircraft becomes more dependent on the electric power system
Dynamic State Estimation in Distributed Aircraft Electric Control Systems via Adaptive Submodularity
Xu , Huan
exists on diagnostics of electric power systems focusing on AC systems [5], as well as large vehicle industry signifies progress in the direction of more energy efficient vehicles. Electric systems are replac, the flight-criticality of an aircraft becomes more dependent on the electric power system as well. Because
44 Market St - Refurbishment of a Dual Duct Building
Bannister, P.; Foo, G.
2013-01-01T23:59:59.000Z
occupancy was 2 stars without Green Power. This paper describes the process of refurbishing the building including: Modifications to convert the air conditioning system to a variable volume dual duct system, re-using many of the components of the original...
Griffith, Daniel Todd
2005-02-17T23:59:59.000Z
computation and evaluation of partial derivatives with minimal user coding. The key results in this dissertation details the use of OCEA through a number of computational studies in estimation and dynamical modeling. Several prototype problems are studied... Embedding Method), has been recently developed which shows promise for efficient computation and evaluation of partial derivatives. For a rather arbitrary sequentially substituted set of functions, coded in FORTRAN 90, OCEA invokes operator overloading...
Gutner, Sophie Isabelle
1996-01-01T23:59:59.000Z
A successful space mission depends on the reliable operation of the spacecraft's electrical power system. For payloads requiring high power levels, various designs of space nuclear power systems (SNPS) are available. Designers have conducted limited...
Kelly, Maggi
2013-01-01T23:59:59.000Z
A Proposed Early-Warning Fire Detection System Carlton R.ability of a system to provide early outbreak warnings toearly-warning satellite, and then, using existing archival images of relevant background scenes and fires, have tested our algorithms and systems
Multicanonical analysis of the plaquette-only gonihedric Ising model and its dual
Marco Mueller; Desmond A. Johnston; Wolfhard Janke
2014-07-27T23:59:59.000Z
The three-dimensional purely plaquette gonihedric Ising model and its dual are investigated to resolve inconsistencies in the literature for the values of the inverse transition temperature of the very strong temperature-driven first-order phase transition that is apparent in the system. Multicanonical simulations of this model allow us to measure system configurations that are suppressed by more than 60 orders of magnitude compared to probable states. With the resulting high-precision data, we find excellent agreement with our recently proposed nonstandard finite-size scaling laws for models with a macroscopic degeneracy of the low-temperature phase by challenging the prefactors numerically. We find an overall consistent inverse transition temperature of 0.551334(8) from the simulations of the original model both with periodic and fixed boundary conditions, and the dual model with periodic boundary conditions. For the original model with periodic boundary conditions, we obtain the first reliable estimate of the interface tension, 0.12037(18), using the statistics of suppressed configurations.
Dual-Fuel Truck Fleet: Start-Up Experience
NREL
1998-09-30T23:59:59.000Z
Although dual-fuel engine technology has been in development and limited use for several years, it has only recently moved toward full-scale operational capability for heavy-duty truck applications. Unlike a bifuel engine, which has two separate fuel systems that are used one at a time, a dual-fuel engine uses two fuel systems simultaneously. One of California's South Coast Air Quality Management District (SCAQMD) current programs is a demonstration of dual-fuel engine technology in heavy-duty trucks. These trucks are being studied as part of the National Renewable Energy Laboratory's (NREL's) Alternative Fuel Truck Program. This report describes the start-up experience from the program.
Wang, Guihua; Ogden, Joan M; Chang, Daniel P.Y.
2007-01-01T23:59:59.000Z
production with gaseous hydrogen pipeline delivery, and2) central hydrogen production with pipeline delivery; and (Central hydrogen production with pipeline delivery systems
Furumura, Takashi
of earthquake size in Earthquake Early Warning systems is based on assumption that magnitude of an earthquake Warning systems Vladimir Sokolov1 , Friedemann Wenzel1 , and Takashi Furumura2 1Geophysical Institute the initial P-wave portion of ground motion is the key problems for Earthquake Early Warning (EEW). We
Exceptional points for parameter estimation in open quantum systems: Analysis of the Bloch equations
Morag Am-Shallem; Ronnie Kosloff; Nimrod Moiseyev
2014-12-14T23:59:59.000Z
The dynamics of open quantum systems is typically described by a quantum dynamical semigroup generator ${\\cal L}$. The eigenvalues of ${\\cal L}$ are complex, reflecting unitary as well as dissipative dynamics. For certain values of parameters defining ${\\cal L}$, non-hermitian degeneracies emerge, i.e. exceptional points ($EP$). We study the implications of such points in the open system dynamics of a two-level-system described by the Bloch equation. This open system has become the paradigm of diverse fields in physics, from NMR to quantum information and elementary particles. We find as a function of detuning and driving amplitude a continuous line of exceptional points merging into two cusps of triple degeneracy. The dynamical signature of these $EP$ points is a unique time evolution. This unique feature can be employed experimentally to locate the $EP$ points and thereby to determine the intrinsic system parameters for any desired accuracy.
.e., the `states') are estimated. The process usually uses minimum least squares methods. Power system measurements to information loss through analog to digital conver- sion. State estimation methods can flag and smooth out bad into a digital signal by an analog / digital converter
Bureau of mines cost estimating system handbook (in two parts). 1. Surface and underground mining
Not Available
1987-01-01T23:59:59.000Z
The handbook provides a convenient costing procedure based on the summation of the costs for unit processes required in any particular mining or mineral processing operation. The costing handbook consists of a series of costing sections, each corresponding to a specific mining unit process. Contained within each section is the methodology to estimate either the capital or operating cost for that unit process. The unit process sections may be used to generate, in January 1984 dollars, costs through the use of either costing curves or formulae representing the prevailing technology. Coverage for surface mining includes dredging, quarrying, strip mining, and open pit mining. The underground mining includes individual development sections for drifting, raising, shaft sinking, stope development, various mining methods, underground mine haulage, general plant, and underground mine administrative cost.
Mode Estimation of Model-based Programs: Monitoring Systems with Complex Behavior
Williams, Brian C.
that combines reactive programming constructs with probabilistic, constraint-based modeling, and that offers wending its way through software functions. DS-1 is an instance of modern embedded systems whose
Dutta, Parikshit
2012-10-19T23:59:59.000Z
compared with extended Kalman filter (EKF) and unscented Kalman filter (UKF), and the FP operator based techniques were compared with particle filters, when applied to a duffing oscillator system and hypersonic reentry of a vehicle in the atmosphere...
State and Parameter Estimation for Linear Systems with Nonlinearly Parameterized Perturbations
Johansen, Tor Arne
Hĺvard Fjćr Grip? Ali Saberi?? Tor A. Johansen? Abstract-- We consider systems that can be described of Ali Saberi is partially supported by National Science Foundation grant ECS-0528882 and NAVY grants ONR
A Comparative Evaluation of Personality Estimation Algorithms for the TWIN Recommender System
Rosso, Paolo
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
Evaluating the Similarity Estimator Component of the TWIN Personality-based Recommender System
Rosso, Paolo
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
Dutta, Parikshit
2012-10-19T23:59:59.000Z
compared with extended Kalman filter (EKF) and unscented Kalman filter (UKF), and the FP operator based techniques were compared with particle filters, when applied to a duffing oscillator system and hypersonic reentry of a vehicle in the atmosphere...
A. Freise
2003-06-12T23:59:59.000Z
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, in principle, to beat the standard quantum limit. The interferometric gravitational-wave detector GEO600 is the first detector 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.
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
1997-03-28T23:59:59.000Z
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.
Dynamic simulation of dual-speed wind turbine generation
Muljadi, E.; Butterfield, C.P.
1996-10-01T23:59:59.000Z
Induction generators have been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness, and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using two induction generators with two different rated speeds. With single- speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. The operation at maximum Cp can occur only at a single wind speed. However, if the wind speed varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind-speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative to capture more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine will be investigated. One type of control algorithm for dual- speed operation is proposed. Results from a dynamic simulation will be presented to show how the control algorithm works and how power, current and torque of the system vary as the wind turbine is exposed to varying wind speeds.
SPS susceptible-system cost factors investment summary and mitigation-cost-increment estimates
Morrison, E L
1980-05-01T23:59:59.000Z
The Electromagnetic Compatibility (EMC) evaluation program supporting the SPS Concept Development Evaluation Phase has included examinations of the degradation in capability of all susceptible communications and electronic systems that could be exposed to SPS emissions, the development and testing of mitigation techniques to allow operation in the SPS environment, and the development of total investment and mitigation cost data. Mitigation costs relate only to the modification or reconfiguration of susceptible systems; redeployment being a possible consideration for rectenna siting exercises during the SPS Engineering Development Phase. An extensive survey is summarized regarding the current and planned facilities using the equipment categories listed: microwave communications; radar systems; sensors; computers; medical equipment; and research support. Current investment, future plans, and mitigation costs are presented, with geographic distribution in six CONUS areas.
Page 1 of 7 Catamount Software Architecture with Dual Core
Brightwell, Ron
, Dual Core. 1.0 Background A massively parallel processor (MPP), high performance computing (HPC) system of Energy's National Nuclear Security Administration under contract DE-AC04- 94AL85000. synchronization on node specialization [3]. Sets of nodes in an MPP are designated to perform specific tasks, each running
Dual Stewart Platform Mobility Simulator R.F. Boian1
New Jersey, University of Medicine and Dentistry of
Dual Stewart Platform Mobility Simulator R.F. Boian1 , M. Bouzit1 , G.C. Burdea1,* , and J. The system uses two Stewart platform robots to render the walking surface geometry and condition. The hardware components of the platforms and the considerations behind their design are presented here
Free energy calculations using dual-level Born-Oppenheimer molecular dynamics
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
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.
DUAL-OUTPUT HOLA FIRMWARE AND TESTS
another channel (thus, "dual-output" HOLA) · Another LDC+ROMB block was added to receive data from side S32PCI64 "SOLAR" mezzanine card: Provides access to S-LINK via PCI bus The first prototype of dual-outputDUAL-OUTPUT HOLA FIRMWARE AND TESTS Anton Kapliy Mel Shochet Fukun Tang Daping Weng #12;Summary
Solar powered desalination system
Mateo, Tiffany Alisa
2011-01-01T23:59:59.000Z
2: dual bed colloidal suspension Type 3: fixed flat panel2: dual bed colloidal suspension Type 3: fixed flat panelBed Colloidal Suspension…………….37 Figure 1.18: Type 3 PEC System Reactor, Fixed
Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving arising in the Airborne Wind Energy paradigm, an essential one is the control of the tethered airfoil], [3], the Airborne Wind Energy (AWE) paradigm shift proposes to get rid of the structural elements
Paris-Sud XI, Université de
system in a Gas-cooled Fast Reactor (GFR) of literature [3]. Keywords: Functional failure probability direction; ii) employing Artificial Neural Network (ANN) regression models as fast-running surrogates, Genetic Algorithm, long-running code, computational cost. 1 Introduction Modern nuclear reactor concepts
Scale-estimation of quantum coherent energy transport in multiple-minima systems
Tristan Farrow; Vlatko Vedral
2014-06-17T23:59:59.000Z
A generic and intuitive model for coherent energy transport in multiple minima systems coupled to a quantum mechanical bath is shown. Using a simple spin-boson system, we illustrate how a generic donor-acceptor system can be brought into resonance using a narrow band of vibrational modes, such that the transfer efficiency of an electron-hole pair (exciton) is made arbitrarily high. Coherent transport phenomena in nature are of renewed interest since the discovery that a photon captured by the light-harvesting complex (LHC) in photosynthetic organisms can be conveyed to a chemical reaction centre with near-perfect efficiency. Classical explanations of the transfer use stochastic diffusion to model the hopping motion of a photo-excited exciton. This accounts inadequately for the speed and efficiency of the energy transfer measured in a series of recent landmark experiments. Taking a quantum mechanical perspective can help capture the salient features of the efficient part of that transfer. To show the versatility of the model, we extend it to a multiple minima system comprising seven-sites, reminiscent of the widely studied Fenna-Matthews-Olson (FMO) light-harvesting complex. We show that an idealised transport model for multiple minima coupled to a narrow-band phonon can transport energy with arbitrarily high efficiency.
Oscillation annealing and driver/tire load torque estimation in Electric Power Steering Systems
Paris-Sud XI, Université de
the improved LuGre-tire friction model. Index Terms-- Electric Power Steering systems (EPSs), LQ control, Lu a control framework that includes a realistic model of a steering column accounting for all other torque. The contributions of this paper are: a) Optimal output control feedback: Based on the steer- ing column model
Froyland, Gary
systems and random matrix products Gary Froyland Department of Mathematics and Computer Science University://wwwmath.unipaderborn.de/¸froyland Kazuyuki Aihara Department of Mathematical Engineering and Information Physics The University of Tokyo 731 Hongo, Bunkyoku, Tokyo 1130033, JAPAN Abstract We present a fast, simple matrix method of computing
Convergence Properties of an Interval Probabilistic Approach to System Reliability Estimation
Kreinovich, Vladik
by the values of the corresponding parameters x = x(1), x(2), . . . , x(n) ; for example, for a nuclear reactor, interval analysis, reliability analysis, Dempster-Shafer evidence theory, random sets, random intervals of these parameters, the system exhibits certain characteristics y = y(1), y(2), . . . , y(m) ; e.g., for a nuclear
Del Moral , Pierre
Air traffic complexity and the interacting particle system method: An integrated approach explore the possibility of using air traffic complexity metrics to accelerate the Interacting Particle to assess the performance and impact of, e.g., possible modifications of the current air traffic management
Mass Production Cost Estimation for Direct H2 PEM Fuel Cell Systems for
fuel cell vehicles have the potential to eliminate the need for oil in the transportation sector. Fuel, fuel cell vehicles offer an environmentally clean and energysecure transportation pathway for transportation. Fuel cell systems will have to be costcompetitive with conventional and advanced vehicle
Dual shell pressure balanced vessel
Fassbender, Alexander G. (West Richland, WA)
1992-01-01T23:59:59.000Z
A dual-wall pressure balanced vessel for processing high viscosity slurries at high temperatures and pressures having an outer pressure vessel and an inner vessel with an annular space between the vessels pressurized at a pressure slightly less than or equivalent to the pressure within the inner vessel.
Parameter Estimation Using Dual Fractional Power Filters Jason M. Kinser
Kinser, Jason M.
discriminant functions (SDF) which are reviewed in ref. 9. Unlike the previous methods, the SDF class of the SDF class. These filters are Fractional Power Filters (FPFs) which will be reviewed in Section 2 is a superset of two standard SDF-class filters: the SDF and the MACE filter. This section will review the SDF
A Correlation Estimate for Quantum Many-Body Systems at Positive Temperature
Robert Seiringer
2006-04-18T23:59:59.000Z
We present an inequality that gives a lower bound on the expectation value of certain two-body interaction potentials in a general state on Fock space in terms of the corresponding expectation value for thermal equilibrium states of non-interacting systems and the difference in the free energy. This bound can be viewed as a rigorous version of first order perturbation theory for many-body systems at positive temperature. As an application, we give a proof of the first two terms in a high density (and high temperature) expansion of the free energy of jellium with Coulomb interactions, both in the fermionic and bosonic case. For bosons, our method works above the transition temperature (for the non-interacting gas) for Bose-Einstein condensation.
Nonlinear Estimation for Model Based Fault Diagnosis of Nonlinear Chemical Systems
Qu, Chunyan
2011-02-22T23:59:59.000Z
. . . . . . . . . . . . . . . . . . . . 84 xii TABLE Page XV MSEs for Algorithms (?t = 0.02,R = 0.01I) for EKF Imple- mentations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 XVI Summary of MSEs for All Algorithms for EKF Implementations 93 XVII MSEs for Algorithms with a...-dimensional states while Li and Kadirkamanathan [79] investigated the PF based likelihood ratio ap- proach to fault diagnosis in nonlinear stochastic systems. T. Chen and his coworkers used particle filters for dynamic data rectification and process change detection...
NONE
1997-09-23T23:59:59.000Z
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.
Dueck, Gerhard W.
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 13, NO. 6, JUNE 2005 765, and M. I. Elmasry, "Dynamic and leakage power reduction in MTCMOS circuits using an automated effi. 1997. [6] Q. Wang and S. B. K. Vrudhula, "Static power optimization of deep submicron CMOS circuits
Horowitz, Roberto
. Conventional single-stage servo systems, which utilize a voice coil 1 #12;motor (VCM) as an actuator, known in the HDD industry as the PES, and other measurements, which may include outputs of vibration of the PES against all undesirable exogenous disturbance such as track runout, windage and measurement noise
Bizais, Y.; Zubal, I.G.; Rowe, R.W.; Bennett, G.W.; Brill, A.B.
1982-01-01T23:59:59.000Z
Emission tomography using two orthogonal sets of projections through seven pinhole collimators is considered. This paper describes the acquisition system, the reconstruction algorithm, presents results obtained in phantom studies, and discusses the advantages and disadvantages of this method over conventional Seven Pinhole Tomography.
Gutner, Sophie Isabelle
1996-01-01T23:59:59.000Z
of electrons between the emitter and collector, a positively charged ion plasma is injected between the elecuodes. In the SEHPTR's TI assemblies (detailed in Chapter VI), the plasma is cesium. The temperatures of the emitter and collector are 1925K and 1000K... and the contamination of land, air, water, and the food supply. It also provides insights into the relative effectiveness of emergency response planning. PRA permits one to identify components and system failure modes and to obtain a clear understanding of how one...
Kim, S; Lee, J; Lee, D; Lee, S; Choe, B [The Catholic University of Korea, Seoul, Seoul (Korea, Republic of); Baek, H [Korea Basic Science Institute, Chungwon, Chungwon (Korea, Republic of)
2014-06-01T23:59:59.000Z
Purpose: In this work, we present the feasibility of use of the parallel RF transmission with multiple RF source (MultiTransmit) imaging in MRI-based polymer gel dosimetry. Methods: The commercially available BANG3 gel was used for gel dosimetry. Spin-spin relaxation rate R2 was used to quantify the absorbed dose. The image quality (signal-to-noise ratio, SNR; image uniformity) and B1 field inhomogeneity between conventional single-source and MultiTransmit MR imaging were compared. Finally, the estimated R2 uncertainty ?(R2) and dosimetric performance (i.e., dose resolution) between conventional single-source and MultiTransmit MR imaging were compared. Results: Image quality and B1 field homogeneity within each calibration vial and large phantom was statistically better in MultiTransmit imaging than in conventional single-source RF transmission imaging (P < 0.005 for all calibration vials). In particular, ?(R2) (defined as the standard uncertainty of R2) was lower on the MultiTransmit images than on the conventional single-source images. Furthermore, the MultiTransmit measurement gives a lower than that obtained using the conventional single-source method. Conclusion: The improved image quality and B1 homogeneity resulted in reduced dose uncertainty (i.e., ?(R2) and dose resolution) in MRI-based polymer gel dosimetry, suggesting that MultiTransmit MR imaging has potential benefits for use in clinical 3D gel dosimetry without the need for the complicated B1 field correction method.
Dimarogonas, Dimos V.
We use a combination of primal and dual Lyapunov theory for almost global asymptotic stabilization and collision avoidance in multi-agent systems. Previous work provided local analysis around the critical points with the ...
Greskowiak, Janek; Prommer, Henning; Liu, Chongxuan; Post, Vincent; Ma, Rui; Zheng, Chunmiao; Zachara, John M.
2010-09-16T23:59:59.000Z
A laboratory-derived conceptual and numerical model for U(VI) transport at the Hanford 300A site, Washington, USA, was applied to a range of field-scale scenarios of different complexity to systematically evaluate model parameter sensitivities. The model, originally developed from column experiment data, included distributed-rate surface complexation kinetics of U(VI), aqueous speciation, and physical non-equilibrium transport processes. A rigorous parameter sensitivity analysis was carried out with respect to different state variables: concentrations, mass fluxes, total mass and spatial moments of dissolved U(VI) for laboratory systems, and various simulation scenarios that represented the field-scale characteristics at the Hanford 300A site. The field-scenarios accounted for transient groundwater flow and variable geochemical conditions driven by frequent water level changes of the nearby Columbia River. Simulations indicated that the transient conditions significantly affected U(VI) plume migration at the site. The parameter sensitivities were largely similar between the laboratory and field scale systems. Where differences existed, they were shown to result from differing degrees of U(VI) adsorption disequilibrium caused by hydraulic or hydrogeochemical conditions. Adorption disequilibrium was found to differ (i) between short duration peak flow events at the field scale and much longer flow events in the laboratory, (ii) for changing groundwater chemical compositions due to river water intrusion, and (iii) for different sampling locations at the field scale. Parameter sensitivities were also found to vary with respect to the different investigated state variables. An approach is demonstrated that elucidates the most important parameters of a laboratory-scale model that must constrained in both the laboratory and field for meaningful field application.
Yoon, Yeo Jun
2006-04-12T23:59:59.000Z
This thesis will investigate the impact of the use of the Phasor Measurement Units (PMU) on the state estimation problem. First, incorporation of the PMU measurements in a conventional state estimation program will be discussed. Then, the effect...
Cohen, N. [New York Univ. Medical Center, Tuxedo, NY (United States). Dept. of Environmental Medicine
1989-03-15T23:59:59.000Z
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.
Nexant Inc.
2006-05-01T23:59:59.000Z
As part of Task 2, Gas Cleanup and Cost Estimates, Nexant investigated the appropriate process scheme for removal of acid gases from black liquor-derived syngas for use in both power and liquid fuels synthesis. Two 3,200 metric tonne per day gasification schemes, both low-temperature/low-pressure (1100 deg F, 40 psi) and high-temperature/high-pressure (1800 deg F, 500 psi) were used for syngas production. Initial syngas conditions from each of the gasifiers was provided to the team by the National Renewable Energy Laboratory and Princeton University. Nexant was the prime contractor and principal investigator during this task; technical assistance was provided by both GTI and Emery Energy.
Dual LED/incandescent security fixture
Gauna, Kevin Wayne
2005-06-21T23:59:59.000Z
A dual LED and incandescent security lighting system uses a hybrid approach to LED illumination. It combines an ambient LED illuminator with a standard incandescent lamp on a motion control sensor. The LED illuminator will activate with the onset of darkness (daylight control) and typically remain on during the course of the night ("always on"). The LED illumination, typically amber, is sufficient to provide low to moderate level lighting coverage to the wall and ground area adjacent to and under the fixture. The incandescent lamp is integrated with a motion control circuit and sensor. When movement in the field of view is detected (after darkness), the incandescent lamp is switched on, providing an increased level of illumination to the area. Instead of an "always on" LED illuminator, the LEDs may also be switched off when the incandescent lamp is switched on.
Vasantrao, Kardile Vilas
2011-01-01T23:59:59.000Z
Accurate software cost and schedule estimation are essential for software project success. Often it referred to as the "black art" because of its complexity and uncertainty, software estimation is not as difficult or puzzling as people think. In fact, generating accurate estimates is straightforward-once you understand the intensity of uncertainty and framework for the modeling process. The mystery to successful software estimation-distilling academic information and real-world experience into a practical guide for working software professionals. Instead of arcane treatises and rigid modeling techniques, this will guide highlights a proven set of procedures, understandable formulas, and heuristics that individuals and development teams can apply to their projects to help achieve estimation proficiency with choose appropriate development approaches In the early stage of software life cycle project manager are inefficient to estimate the effort, schedule, cost estimation and its development approach .This in tu...
System engineering approach to GPM retrieval algorithms
Rose, C. R. (Chris R.); Chandrasekar, V.
2004-01-01T23:59:59.000Z
System engineering principles and methods are very useful in large-scale complex systems for developing the engineering requirements from end-user needs. Integrating research into system engineering is a challenging task. The proposed Global Precipitation Mission (GPM) satellite will use a dual-wavelength precipitation radar to measure and map global precipitation with unprecedented accuracy, resolution and areal coverage. The satellite vehicle, precipitation radars, retrieval algorithms, and ground validation (GV) functions are all critical subsystems of the overall GPM system and each contributes to the success of the mission. Errors in the radar measurements and models can adversely affect the retrieved output values. Ground validation (GV) systems are intended to provide timely feedback to the satellite and retrieval algorithms based on measured data. These GV sites will consist of radars and DSD measurement systems and also have intrinsic constraints. One of the retrieval algorithms being studied for use with GPM is the dual-wavelength DSD algorithm that does not use the surface reference technique (SRT). The underlying microphysics of precipitation structures and drop-size distributions (DSDs) dictate the types of models and retrieval algorithms that can be used to estimate precipitation. Many types of dual-wavelength algorithms have been studied. Meneghini (2002) analyzed the performance of single-pass dual-wavelength surface-reference-technique (SRT) based algorithms. Mardiana (2003) demonstrated that a dual-wavelength retrieval algorithm could be successfully used without the use of the SRT. It uses an iterative approach based on measured reflectivities at both wavelengths and complex microphysical models to estimate both No and Do at each range bin. More recently, Liao (2004) proposed a solution to the Do ambiguity problem in rain within the dual-wavelength algorithm and showed a possible melting layer model based on stratified spheres. With the No and Do calculated at each bin, the rain rate can then be calculated based on a suitable rain-rate model. This paper develops a system engineering interface to the retrieval algorithms while remaining cognizant of system engineering issues so that it can be used to bridge the divide between algorithm physics an d overall mission requirements. Additionally, in line with the systems approach, a methodology is developed such that the measurement requirements pass through the retrieval model and other subsystems and manifest themselves as measurement and other system constraints. A systems model has been developed for the retrieval algorithm that can be evaluated through system-analysis tools such as MATLAB/Simulink.
Revised -03/2007 REQUEST FOR DUAL EMPLOYMENT
Hardy, Christopher R.
Revised -03/2007 REQUEST FOR DUAL EMPLOYMENT See Management Directive 525.11 A. TO BE COMPLETED BY SUPERVISOR REQUESTING DUAL EMPLOYMENT EMPLOYEE'S NAME PERSONNEL # DUAL EMPLOYMENT BUREAU OR INSTITUTION REQUESTED CLASS TITLE AND DESCRIPTION OF DUAL EMPLOYMENT DUTIES DATES OF DUAL EMPLOYMENT (AUTHORIZATION MAY
Self-dual Maxwell field in 3D gravity with torsion
Blagojevic, M.; Cvetkovic, B. [Institute of Physics, P.O. Box 57, 11001 Belgrade (Serbia)
2008-08-15T23:59:59.000Z
We study the system of a self-dual Maxwell field coupled to 3D gravity with torsion, with the Maxwell field modified by a topological mass term. General structure of the field equations reveals a new, dynamical role of the classical central charges, and gives a simple correspondence between self-dual solutions with torsion and their Riemannian counterparts. We construct two exact self-dual solutions, corresponding to the sectors with a massless and massive Maxwell field, and calculate their conserved charges.
Sodium Titanate Anodes for Dual Intercalation Batteries
Doeff, Marca M.
2014-01-01T23:59:59.000Z
for Dual Intercalation Batteries Lithium supply securityinterest in sodium-ion batteries. These devices operate muchsodium-ion or lithium-ion batteries that utilize them as
Dual Axis Radiographic Hydrodynamic Test Facility | National...
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Dual Axis Radiographic Hydrodynamic Test Facility | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing...
Distribution System State Estimation
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEA : Papers SubfoldersU.S.PV FOR ELECTRICITYExports[pic] Load
Lee, Keun Woo
An Innovative Strategy for Dual Inhibitor Design and Its Application in Dual Inhibition of Human (SSAC), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Research Institute to other dual target drug designs. Citation: Arooj M, Sakkiah S, Cao Gp, Lee KW (2013) An Innovative
Conjugate gradient method for dual-dual mixed formulations Gabriel N. Gatica y Norbert Heuer z
Heuer, Norbert
Conjugate gradient method for dual-dual mixed formulations #3; Gabriel N. Gatica y Norbert Heuer z, the conjugate gradient method with this special inner product can be used as iterative solver. For a model-dual variational formulation, conjugate gradient method. Mathematics subject classi#12;cations (1991). 65N30, 65N22
Development and Use of the Dual-Mode Plasma Torch
Womack, R.; Shuey, M.
2002-02-26T23:59:59.000Z
After several years of development, a commercially available high-temperature treatment system has been developed and installed that treats heterogeneous low-level radioactive waste. High temperature plasma processing, unique torch design and operating features make it feasible to achieve a volume reduced, permanent, high integrity waste form while eliminating the personnel exposure and costs associated with conventional sorting, characterizing and handling. Plasma technology can also be used to treat previous conditioned waste packages that no longer meet the current acceptance criteria for final disposal. Plasma treatment can result, in many cases, in a substantial volume reduction, which lowers the final disposal costs. This paper covers the recently patented dual mode plasma torch design(1), the lessons learned that fostered its development and the advantages it brings to radioactive waste processing. This paper also provides current full scale Plasma Arc Centrifugal Treatment (PACT) project status and how the dual mode torch is being used in the PACT system.
Dual families of noncommutative quantum systems
Scholtz, Frederik G.; Chakraborty, Biswajit; Gangopadhyay, Sunandan; Hazra, Arindam Ghosh [Institute of Theoretical Physics, University of Stellenbosch, Private Bag X1, Matieland 7602 (South Africa); and Satyendra Nath Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata - 700098 (India); Satyendra Nath Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata - 700098 (India)
2005-04-15T23:59:59.000Z
We demonstrate how a one parameter family of interacting noncommuting Hamiltonians, which are physically equivalent, can be constructed in noncommutative quantum mechanics. This construction is carried out exactly (to all orders in the noncommutative parameter) and analytically in two dimensions for a free particle and a harmonic oscillator moving in a constant magnetic field. We discuss the significance of the Seiberg-Witten map in this context. It is shown for the harmonic oscillator potential that an approximate duality, valid in the low-energy sector, can be constructed between the interacting commutative and a noninteracting noncommutative Hamiltonian. This approximation holds to order 1/B and is therefore valid in the case of strong magnetic fields and weak Landau-level mixing.
Bag model of hadrons, dual QCD thermodynamics and Quark-Gluon Plasma
H. C. Chandola; Garima Punetha; H. Dehnen
2015-05-16T23:59:59.000Z
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 of the system via a mixed phase of QGP and hot hadron gas. The associated profiles of the normalized energy density and the specific heat have been shown to lead to a huge latent heat generation and indicate the onset of a first-order QGP phase transition. The squared speed of sound has been shown to act as a physical measure of large thermodynamical fluctuations near transition point where it shows a large reduction in its value as compared to the conformal limit and has intimate connection with the evolution of fire-ball and QGP in heavy-ion collision events. The possible implications of the trace anomaly and conformal measure on QGP formation have been discussed and a considerable increase in the degrees of freedom and the associated interaction effects has been indicated around the transition region and discussed for its relevance with the modern heavy-ion collision experiments.
MICROSTRUCTURE AND PROPERTIES OF DUAL PHASE STEELS CONTAINING FINE PRECIPITATES
Gau, J.S.
2014-01-01T23:59:59.000Z
and Properties of Dual-Phase Steels, R. A. Kot and J. W.of Niobium Microalloyed Dual- Phase Steel, MetallurgicalAND PROPERTIES OF DUAL PHASE STEELS CONTAINING FINE
Paris-Sud XI, UniversitĂ© de
Recession-based hydrological models for estimating low flows in ungauged catchments in the Himalayas 891 Hydrology and Earth System Sciences, 8(5), 891902 (2004) Â© EGU Recession-based hydrological.R. Young1 and S.R. Kansakar2 1 Centre for Ecology and Hydrology,Wallingford, Oxfordshire, OX10 8BB, UK 2
Giuseppe Palmiotti; Massimo Salvatores
2015-01-01T23:59:59.000Z
This paper aims to show the main diffrences between the COMMARA-2.0 and COMMARA-2.1 evaluated covariance data in the uncertainty estimation of integral parameters of interest for a large number of typical innovative fast neutron systems.
Texas Dual Language Program Cost Analysis
Lara-Alecio, Rafael; Galloway, Martha; Mahadevan, Lakshmi; Mason, Ben; Irby, Beverly J.; Brown, Genevieve; Gómez, Leo
2010-09-29T23:59:59.000Z
.......................................................................................................... 4 Texas Dual Language Program Cost Analysis............................................................... 8 Literature Review ............................................................................................................. 8 English... inclusivity, dual language (DL) programs (sometimes referred to as two-way immersion) have seen a rapid increase in Texas and the nation, however, an extensive review of literature indicated that no national or state-wide studies have addressed the issue...
Friction Coefficient for Quarks in Supergravity Duals
E. Antonyan
2006-11-22T23:59:59.000Z
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.
Dual condensate and QCD phase transition
Zhang Bo; Bruckmann, Falk [Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany); Fodor, Zoltan; Szabo, Kalman K. [Department of Physics, University of Wuppertal, Gaussstr. 20, D-42119 (Germany); Gattringer, Christof [Institut fuer Physik, Universitaet Graz, Universitaetsplatz 5, A-8010 Graz (Austria)
2011-05-23T23:59:59.000Z
The dual condensate is a new QCD phase transition order parameter, which connnects confinement and chiral symmetry breaking as different mass limits. We discuss the relation between the fermion spectrum at general boundary conditions and the dual condensate and show numerical results for the latter from unquenched SU(3) lattice configurations.
Modeling and analysis of dual hydroforming process
Jain, Nishant
2004-09-30T23:59:59.000Z
Effect of Strain Hardening Exponent, n................................ 69 Effect of Anisotropy, r .......................................................... 71 Effect of Friction... of Friction on Dual Hydroforming Process ..................................... 75 5-6 Effect of Different Materials on Dual Hydroforming Process................... 77 xi LIST OF TABLES TABLE Page 2-1 Material Properties for Copper...
DUAL FACE ALGORITHM USING GAUSS-JORDAN ELIMINATION ...
2015-05-06T23:59:59.000Z
Primary 90C05; Secondary 65K05. Key words and phrases. linear programming, bounded-variable, dual face, dual optimal face, Gauss-. Jordan elimination .
Dual spatial maps of transcript and protein abundance in the...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...
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)...
Sensitive Immunosensor for Cancer Biomarker Based on Dual Signal...
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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...
Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy...
Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Acciona logo Acciona Solar, under...
POLICY GUIDANCE MEMORANDUM #11A Approval Process for Dual Compensation...
Office of Environmental Management (EM)
1A Approval Process for Dual Compensation Waivers for Reemployed Annuitants POLICY GUIDANCE MEMORANDUM 11A Approval Process for Dual Compensation Waivers for Reemployed Annuitants...
Nexant Inc.
2006-05-01T23:59:59.000Z
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.
Fuel Cell Technologies Publication and Product Library (EERE)
This report is the third annual update of a comprehensive automotive fuel cell cost analysis. It contains estimates for material and manufacturing cost of complete 80 kWnet direct hydrogen proton exch
Broader source: Energy.gov [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.
Dual Sync Pulse orbital welding of Zeron 100
Warburton, G.R.; Spence, M.A. [Weir Materials Ltd., Manchester (United Kingdom); Potter, S.R. [Dimetrics, Inc., Davidson, NC (United States)
1994-12-31T23:59:59.000Z
The paper describes a new orbital GTAW welding system. Dual Synchronized Pulsation is a further development of the Sync Pulse mode of operation. In Sync Pulse operation the primary weld parameters (current, voltage and wire feed speed) are pulsed between a primary and background value together with synchronization to the torch oscillation position allied with presetting duration using in dwell, excursion and out dwell times. Dual Sync Pulse utilizes two wire feed systems feeding a chill wire directly into the rear of the weld pool on the side opposite the weld torch and the main wire feed. The chill wires fed into the trailing side of the torch absorbs energy from the weld pool effectively limiting heat transmitted to the base material. This technique provides higher deposition rates, decreased welding times and lower heat inputs per pound of deposited metal. Using Dual Sync Pulse, substantial increases in metal deposition rate compared to single wire technique were obtained together with lower heat inputs per kg (pound) of deposited metal. Both mechanical properties and corrosion test results met normal fabrication specification requirements. No evidence of intermetallic phase precipitation was found using optical microscopy. The ability to increase deposition rate without concurrent increase in heat input offers the fabricator significant advantages when welding a super duplex stainless steels such as Zeron 100. In addition, the reduced number of runs and lower heat inputs provide welds with less hoop shrinkage and lower residual stress.
Yoon, Yeo Jun
2006-04-12T23:59:59.000Z
.3 Simulation Example of IEEE14 Bus System ...???????..??..47 5.4 Simulation Example of IEEE118 Bus System ...??????.....?.....53... with Rectangular Form ...???????????...?15 6 Two Bus System with Measurements ?...????????????????.17 7 IEEE14 Bus System with PMU Locations ...???????????????.19 8 IEEE30 Bus System with PMU Locations ...?????????????.??19 9 IEEE57 Bus System...
Cooling load estimation methods
McFarland, R.D.
1984-01-01T23:59:59.000Z
Ongoing research on quantifying the cooling loads in residential buildings, particularly buildings with passive solar heating systems, is described. Correlations are described that permit auxiliary cooling estimates from monthly average insolation and weather data. The objective of the research is to develop a simple analysis method, useful early in design, to estimate the annual cooling energy required of a given building.
Chopra, O.K
1994-08-01T23:59:59.000Z
This report presents a revision of the procedure and correlations presented earlier in NUREG/CR-4513, ANL-90/42 (June 1991) for predicting the change in mechanical properties of cast stainless steel components due to thermal aging during service in light water reactors at 280-330{degrees}C (535-625{degrees}F). The correlations presented in this report are based on an expanded data base and have been optimized with mechanical-property data on cast stainless steels aged up to {approx}58,000 h at 290-350{degrees}C (554-633{degrees}F). The fracture toughness J-R curve, tensile stress, and Charpy-impact energy of aged cast stainless steels are estimated from known material information. Mechanical properties of a specific cast stainless steel are estimated from the extent and kinetics of thermal embrittlement. Embrittlement of cast stainless steels is characterized in terms of room-temperature Charpy-impact energy. Charpy-impact energy as a function of time and temperature of reactor service is estimated from the kinetics of thermal embrittlement, which are also determined from the chemical composition. The initial impact energy of the unaged steel is required for these estimations. Initial tensile flow stress is needed for estimating the flow stress of the aged material. The fracture toughness J-R curve for the material is then obtained by correlating room-temperature Charpy-impact energy with fracture toughness parameters. The values of J{sub IC} are determined from the estimated J-R curve and flow stress. A common {open_quotes}predicted lower-bound{close_quotes} J-R curve for cast stainless steels of unknown chemical composition is also defined for a given grade of steel, range of ferrite content, and temperature. Examples of estimating mechanical properties of cast stainless steel components during reactor service are presented.
Operated device estimation framework
Rengarajan, Janarthanan
2009-05-15T23:59:59.000Z
Protective device estimation is a challenging task because there are numerous protective devices present in a typical distribution system. Among various protective devices, auto-reclosers and fuses are the main overcurrent protection on distribution...
Zheng, Jun; Rao, Bhaskar D
2006-01-01T23:59:59.000Z
multiple-output (MIMO) system, soft-input soft-output MIMOLDPC)-coded MIMO systems employing a soft iterative receiverLDPC-coded MIMO system with optimal soft MIMO detector over
Ribes, Aurélien
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
Investigating Dual Language Models: A Case Study
Luevanos-Clemente, Ruby Nicole
2014-09-26T23:59:59.000Z
The general purpose of this research was to identify the characteristics, along with differences, of the dual language (DL) programs in elementary schools in two central schools in Texas. A secondary purpose was to analyze test scores over time...
Gravity dual of metastable dynamical supersymmetry breaking
DeWolfe, Oliver [Department of Physics, 390 UCB, University of Colorado, Boulder, Colorado 80309 (United States); Kachru, Shamit; Mulligan, Michael [Department of Physics and SLAC, Stanford University, Stanford, California 94305/94309 (United States)
2008-03-15T23:59:59.000Z
Metastable, supersymmetry-breaking configurations can be created in flux geometries by placing antibranes in warped throats. Via gauge/gravity duality, such configurations should have an interpretation as supersymmetry-breaking states in the dual field theory. In this paper, we perturbatively determine the asymptotic supergravity solutions corresponding to D3-brane probes placed at the tip of the cascading warped deformed conifold geometry, which is dual to an SU(N+M)xSU(N) gauge theory. The backreaction of the antibranes has the effect of introducing imaginary anti-self-dual flux, squashing the compact part of the space and forcing the dilaton to run. Using the generalization of holographic renormalization to cascading geometries, we determine the expectation values of operators in the dual field theory in terms of the asymptotic values of the supergravity fields.
Dual superconducting properties of the QCD vacuum
A. D'Alessandro; M. D'Elia
2005-10-27T23:59:59.000Z
A consistent description of the confining QCD vacuum as a dual superconductor requires a determination of fundamental parameters such as the superconductor correlation length $\\xi$ and the field penetration depth $\\lambda$, which determine whether the superconductor is of type I or type II. We illustrate preliminary results of a lattice determination of $\\xi$ for the case of pure Yang-Mills with two colors, obtained by measuring the temporal correlator of a disorder parameter detecting dual superconductivity.
Enhanced State Estimators Final Project Report
. State estimators, integrated into control center energy management systems, provide estimates of varying magnitude. As a result, a state estimator is an essential tool for system monitoring becauseEnhanced State Estimators Final Project Report Power Systems Engineering Research Center A National
Chen, Sheng
Blind Joint Maximum Likelihood Channel Estimation and Data Detection for Single-Input Multiple of Southampton, Southampton SO17 1BJ, U.K. Abstract--A blind adaptive scheme is proposed for joint maximum. A simulation example is used to demon- strate the effectiveness of this joint ML optimization scheme for blind
-Based Electrochemical Estimation and Constraint Management for Pulse Operation of Lithium Ion Batteries Kandler A. Smith Technologies, Graduate Automotive Technology Education Pro- gram. This work was performed at the Pennsylvania-mail: kandlers@hotmail.com; kandler_smith@nrel.gov). C. D. Rahn and C.-Y. Wang are with the Department
T ti E St S tTetiaroa Energy Storage System Estimated ZBB Zinc Bromide Battery Performance and Costs
Kammen, Daniel M.
://rael.berkeley.edu 1 #12;Island Load and DieselIsland Load and Diesel Generation Assumptions #12;Estimated Elect ical variation #12;Diesel Gene ationDiesel Generation It was assumed that backup generation will be met via (2) 455 kW diesel generator sets These generator sets were modeled using data available
Dual-domain lateral shearing interferometer
Naulleau, Patrick P.; Goldberg, Kenneth Alan
2004-03-16T23:59:59.000Z
The phase-shifting point diffraction interferometer (PS/PDI) was developed to address the problem of at-wavelength metrology of extreme ultraviolet (EUV) optical systems. Although extremely accurate, the fact that the PS/PDI is limited to use with coherent EUV sources, such as undulator radiation, is a drawback for its widespread use. An alternative to the PS/PDI, with relaxed coherence requirements, is lateral shearing interferometry (LSI). The use of a cross-grating, carrier-frequency configuration to characterize a large-field 4.times.-reduction EUV lithography optic is demonstrated. The results obtained are directly compared with PS/PDI measurements. A defocused implementation of the lateral shearing interferometer in which an image-plane filter allows both phase-shifting and Fourier wavefront recovery. The two wavefront recovery methods can be combined in a dual-domain technique providing suppression of noise added by self-interference of high-frequency components in the test-optic wavefront.
Dual mode stereotactic localization method and application
Keppel, Cynthia E. (Norfolk, VA); Barbosa, Fernando Jorge (Newport News, VA); Majewski, Stanislaw (Grafton, VA)
2002-01-01T23:59:59.000Z
The invention described herein combines the structural digital X-ray image provided by conventional stereotactic core biopsy instruments with the additional functional metabolic gamma imaging obtained with a dedicated compact gamma imaging mini-camera. Before the procedure, the patient is injected with an appropriate radiopharmaceutical. The radiopharmaceutical uptake distribution within the breast under compression in a conventional examination table expressed by the intensity of gamma emissions is obtained for comparison (co-registration) with the digital mammography (X-ray) image. This dual modality mode of operation greatly increases the functionality of existing stereotactic biopsy devices by yielding a much smaller number of false positives than would be produced using X-ray images alone. The ability to obtain both the X-ray mammographic image and the nuclear-based medicine gamma image using a single device is made possible largely through the use of a novel, small and movable gamma imaging camera that permits its incorporation into the same table or system as that currently utilized to obtain X-ray based mammographic images for localization of lesions.
Dual control active superconductive devices
Martens, Jon S. (Albuquerque, NM); Beyer, James B. (Madison, WI); Nordman, James E. (Madison, WI); Hohenwarter, Gert K. G. (Madison, WI)
1993-07-20T23:59:59.000Z
A superconducting active device has dual control inputs and is constructed such that the output of the device is effectively a linear mix of the two input signals. The device is formed of a film of superconducting material on a substrate and has two main conduction channels, each of which includes a weak link region. A first control line extends adjacent to the weak link region in the first channel and a second control line extends adjacent to the weak link region in the second channel. The current flowing from the first channel flows through an internal control line which is also adjacent to the weak link region of the second channel. The weak link regions comprise small links of superconductor, separated by voids, through which the current flows in each channel. Current passed through the control lines causes magnetic flux vortices which propagate across the weak link regions and control the resistance of these regions. The output of the device taken across the input to the main channels and the output of the second main channel and the internal control line will constitute essentially a linear mix of the two input signals imposed on the two control lines. The device is especially suited to microwave applications since it has very low input capacitance, and is well suited to being formed of high temperature superconducting materials since all of the structures may be formed coplanar with one another on a substrate.
C.P.C. Wong; B. Merrill
2014-10-01T23:59:59.000Z
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.
Performance Analysis of Dual-Fan, Dual-Duct Constant Volume Air-Handling Units
Joo, I. S.; Liu, M.
2001-01-01T23:59:59.000Z
Dual-fan, dual-duct air-handling units introduce outside air directly into the cooling duct and use two variable speed devices to independently maintain the static pressure of the hot and the cold air ducts. Analytical models have been developed...
Dual wavelength laser damage testing for high energy lasers.
Atherton, Briggs W.; Rambo, Patrick K.; Schwarz, Jens; Kimmel, Mark W.
2010-05-01T23:59:59.000Z
As high energy laser systems evolve towards higher energies, fundamental material properties such as the laser-induced damage threshold (LIDT) of the optics limit the overall system performance. The Z-Backlighter Laser Facility at Sandia National Laboratories uses a pair of such kiljoule-class Nd:Phosphate Glass lasers for x-ray radiography of high energy density physics events on the Z-Accelerator. These two systems, the Z-Beamlet system operating at 527nm/ 1ns and the Z-Petawatt system operating at 1054nm/ 0.5ps, can be combined for some experimental applications. In these scenarios, dichroic beam combining optics and subsequent dual wavelength high reflectors will see a high fluence from combined simultaneous laser exposure and may even see lingering effects when used for pump-probe configurations. Only recently have researchers begun to explore such concerns, looking at individual and simultaneous exposures of optics to 1064 and third harmonic 355nm light from Nd:YAG [1]. However, to our knowledge, measurements of simultaneous and delayed dual wavelength damage thresholds on such optics have not been performed for exposure to 1054nm and its second harmonic light, especially when the pulses are of disparate pulse duration. The Z-Backlighter Facility has an instrumented damage tester setup to examine the issues of laser-induced damage thresholds in a variety of such situations [2] . Using this damage tester, we have measured the LIDT of dual wavelength high reflectors at 1054nm/0.5ps and 532nm/7ns, separately and spatially combined, both co-temporal and delayed, with single and multiple exposures. We found that the LIDT of the sample at 1054nm/0.5ps can be significantly lowered, from 1.32J/cm{sup 2} damage fluence with 1054/0.5ps only to 1.05 J/cm{sup 2} with the simultaneous presence of 532nm/7ns laser light at a fluence of 8.1 J/cm{sup 2}. This reduction of LIDT of the sample at 1054nm/0.5ps continues as the fluence of 532nm/7ns laser light simultaneously present increases. The reduction of LIDT does not occur when the 2 pulses are temporally separated. This paper will also present dual wavelength LIDT results of commercial dichroic beam-combining optics simultaneously exposed with laser light at 1054nm/2.5ns and 532nm/7ns.
Neill, Thomas John O'
2011-01-01T23:59:59.000Z
AND MICROSTRUCTURES OF DUAL PHASE STEELS CONTAINING SILICON,and Microstructures of Dual Phase Steels Containing Silicon,microstructures of selected dual-phase steels in which the
EFFECTS OF MORPHOLOGY ON THE MECHANICAL BEHAVIOR OF DUAL PHASE Fe/Si/C STEELS
Kim, N.J.
2012-01-01T23:59:59.000Z
and ductility in dual phase steels. However, it seems thatmechanical behavior of dual phase steels. ACKNOWLEDGEMENTSL INTRODUCTION Dual phase steels whose structures consist of
Dual hidden landscapes in Anderson localization on discrete lattices
Marcelo Leite Lyra; Svitlana Mayboroda; Marcel Filoche
2014-10-09T23:59:59.000Z
The localization subregions of stationary waves in continuous disordered media have been recently demonstrated to be governed by a hidden landscape that is the solution of a Dirichlet problem expressed with the wave operator. In this theory, the strength of Anderson localization confinement is determined by this landscape, and continuously decreases as the energy increases. However, this picture has to be changed in discrete lattices in which the eigenmodes close to the edge of the first Brillouin zone are as localized as the low energy ones. Here we show that in a 1D discrete lattice, the localization of low and high energy modes is governed by two different landscapes, the high energy landscape being the solution of a dual Dirichlet problem deduced from the low energy one using the symmetries of the Hamiltonian. We illustrate this feature using the one-dimensional tight-binding Hamiltonian with random on-site potentials as a prototype model. Moreover we show that, besides unveiling the subregions of Anderson localization, these dual landscapes also provide an accurate overal estimate of the localization length over the energy spectrum, especially in the weak disorder regime.
Dual-speed wind turbine generation
Muljadi, E.; Butterfield, C.P. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Handman, D. [Flowind Corp., San Rafael, CA (United States)] [Flowind Corp., San Rafael, CA (United States)
1996-10-01T23:59:59.000Z
Induction generator has been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using a dual output drive train to drive two induction generators with two different rated speeds. With single-speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. Operation at maximum Cp can occur only at a single wind speed. However, if the wind speed.varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative which captures more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine is investigated. Annual energy production is compared between single-speed and dual-speed operation. One type of control algorithm for dual-speed operation is proposed. Some results from a dynamic simulation will be presented to show how the control algorithm works as the wind turbine is exposed to varying wind speeds.
An investigation of dual-mode operation of a nuclear-thermal rocket engine
Kirk, W.L.; Hedstrom, J.C.; Moore, S.W.; McFarland, R.D.; Merrigan, M.A.; Buksa, J.J.; Cappiello, M.W.; Hanson, D.L.; Woloshun, K.A.
1991-06-01T23:59:59.000Z
A preliminary assessment of the technical feasibility and mass competitiveness of a dual-mode nuclear propulsion and power system based on Rover-type reactors has been completed. Earlier studies have indicated that dual-mode systems appear attractive for electrical power levels of a few kilowatts. However, at the megawatt electrical power level considered in this study, it appears that extensive modifications to the nuclear-thermal engines would be required, the feasibility of which is unclear. Mass competitiveness at high electrical power levels is also uncertain. Further study of reactor and shield design in conjuction with mission and vehicle studies is necessary in order to determine a useful dual-mode power range. 9 refs., 20 figs., 4 tabs.
Parameterized reduced-order models using hyper-dual numbers.
Fike, Jeffrey A.; Brake, Matthew Robert
2013-10-01T23:59:59.000Z
The goal of most computational simulations is to accurately predict the behavior of a real, physical system. Accurate predictions often require very computationally expensive analyses and so reduced order models (ROMs) are commonly used. ROMs aim to reduce the computational cost of the simulations while still providing accurate results by including all of the salient physics of the real system in the ROM. However, real, physical systems often deviate from the idealized models used in simulations due to variations in manufacturing or other factors. One approach to this issue is to create a parameterized model in order to characterize the effect of perturbations from the nominal model on the behavior of the system. This report presents a methodology for developing parameterized ROMs, which is based on Craig-Bampton component mode synthesis and the use of hyper-dual numbers to calculate the derivatives necessary for the parameterization.
Dual order parameters and the deconfinement transition
Christian S. Fischer; Jens A. Mueller
2009-10-29T23:59:59.000Z
We investigate the chiral and the deconfinement transition within the framework of Dyson-Schwinger equations using quenched lattice data for the temperature dependent gluon propagator as input. We extract corresponding order parameters from the Landau gauge quark propagator with U(1)-valued boundary conditions. We study the chiral transition using the conventional quark condensate, whereas for the deconfinement transition we determine the dual condensate ('dressed Polyakov loop'). In addition we consider an alternative order parameter for deconfinement, the dual scalar quark dressing function. As a result we find almost the same transition temperatures for the chiral and deconfinement transitions.
Dual waveband compact catadioptric imaging spectrometer
Chrisp, Michael P.
2012-12-25T23:59:59.000Z
A catadioptric dual waveband imaging spectrometer that covers the visible through short-wave infrared, and the midwave infrared spectral regions, dispersing the visible through shortwave infrared with a zinc selenide grating and midwave infrared with a sapphire prism. The grating and prism are at the cold stop position, enabling the pupil to be split between them. The spectra for both wavebands are focused onto the relevant sections of a single dual waveband detector. Spatial keystone distortion is controlled to less than one tenth of a pixel over the full wavelength range, facilitating the matching of the spectra in the midwave infrared with the shorter wavelength region.
Dual Superconductivity in G2 group
G. Cossu; M. D'Elia; A. Di Giacomo; B. Lucini; C. Pica
2006-09-28T23:59:59.000Z
We investigate the dual superconductivity mechanism in the exceptional group $G_2$. This is a centerless group (no 't Hooft flux vortices are allowed) and we check for the presence of a magnetic monopole condensate in the confined phase by measuring on the lattice a disorder parameter related to the vacuum expectation value of an operator carrying magnetic charge. The behaviour of the disorder parameter is consistent with the dual superconductor picture. A first step of an analysis on the thermodynamical properties of the theory is conducted by mean of this operator.
Blair, N.; Mehos, M.; Short, W.; Heimiller, D.
2006-04-01T23:59:59.000Z
This paper presents the Concentrating Solar Deployment System Model (CSDS). CSDS is a multiregional, multitime-period, Geographic Information System (GIS), and linear programming model of capacity expansion in the electric sector of the United States. CSDS is designed to address the principal market and policy issues related to the penetration of concentrating solar power (CSP) electric-sector technologies. This paper discusses the current structure, capabilities, and assumptions of the model. Additionally, results are presented for the impact of continued research and development (R&D) spending, an extension to the investment tax credit (ITC), and use of a production tax credit (PTC). CSDS is an extension of the Wind Deployment System (WinDS) model created at the National Renewable Energy Laboratory (NREL). While WinDS examines issues related to wind, CSDS is an extension to analyze similar issues for CSP applications. Specifically, a detailed representation of parabolic trough systems with thermal storage has been developed within the existing structure.
Wang, Wei, S.M. Massachusetts Institute of Technology
2010-01-01T23:59:59.000Z
This research explores the application of archived data from Automatic Data Collection Systems (ADCS) to transportation planning with a focus on bus passenger Origin-Destination (OD) inferences at the bus-route level and ...
Investigations of Dual-Purpose Canister Direct Disposal Feasibility...
Office of Environmental Management (EM)
Investigations of Dual-Purpose Canister Direct Disposal Feasibility (FY14) R1 Investigations of Dual-Purpose Canister Direct Disposal Feasibility (FY14) R1 Results continue to...
Combustion and Emissions Performance of Dual-Fuel Gasoline and...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Combustion and Emissions Performance of Dual-Fuel Gasoline and Diesel HECC on a Multi-Cylinder Light Duty Diesel Engine Combustion and Emissions Performance of Dual-Fuel Gasoline...
Aging and the vulnerability of speech to dual task demands
Kemper, Susan; Schmalzried, RaLynn Cheri; Hoffman, Lesa; Herman, Ruth
2010-12-01T23:59:59.000Z
Tracking a digital pursuit rotor task was used to measure dual task costs of language production by young and older adults. Tracking performance by both groups was affected by dual task demands: time on target declined and ...
Measurement enhancement for state estimation
Chen, Jian
2009-05-15T23:59:59.000Z
in the power system. A robust state estimation should have the capability of keeping the system observable during different contingencies, as well as detecting and identifying the gross errors in measurement set and network topology. However, this capability...
Optimization Online - Convergence Analysis of Primal-Dual Based ...
Wenyi Tian
2014-09-24T23:59:59.000Z
Sep 24, 2014 ... Convergence Analysis of Primal-Dual Based Methods for Total Variation Minimization with Finite Element Approximation.
A Preconditioner for a Primal-Dual Newton Conjugate Gradients ...
Kimon Fountoulakis
2014-12-30T23:59:59.000Z
Dec 30, 2014 ... A Preconditioner for a Primal-Dual Newton Conjugate Gradients Method for Compressed Sensing Problems.
Dual cure low-VOC coating process. Final technical report, Phase 3
Kinzer, K.E.
1993-12-01T23:59:59.000Z
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.
Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
Ranjit, Gambhir; Stutz, Jordan H; Cunningham, Mark; Geraci, Andrew A
2015-01-01T23:59:59.000Z
We describe the implementation of laser-cooled silica microspheres as force sensors in a dual-beam optical dipole trap in high vacuum. Using this system we have demonstrated trap lifetimes exceeding several days, attonewton force detection capability, and wide tunability in trapping and cooling parameters. Measurements have been performed with charged and neutral beads to calibrate the sensitivity of the detector. This work establishes the suitability of dual beam optical dipole traps for precision force measurement in high vacuum with long averaging times, and enables future applications including the study of gravitational inverse square law violations at short range, Casimir forces, acceleration sensing, and quantum opto-mechanics.
Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
Gambhir Ranjit; David P. Atherton; Jordan H. Stutz; Mark Cunningham; Andrew A. Geraci
2015-03-30T23:59:59.000Z
We describe the implementation of laser-cooled silica microspheres as force sensors in a dual-beam optical dipole trap in high vacuum. Using this system we have demonstrated trap lifetimes exceeding several days, attonewton force detection capability, and wide tunability in trapping and cooling parameters. Measurements have been performed with charged and neutral beads to calibrate the sensitivity of the detector. This work establishes the suitability of dual beam optical dipole traps for precision force measurement in high vacuum with long averaging times, and enables future applications including the study of gravitational inverse square law violations at short range, Casimir forces, acceleration sensing, and quantum opto-mechanics.
Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
Gambhir Ranjit; David P. Atherton; Jordan H. Stutz; Mark Cunningham; Andrew A. Geraci
2015-04-03T23:59:59.000Z
We describe the implementation of laser-cooled silica microspheres as force sensors in a dual-beam optical dipole trap in high vacuum. Using this system we have demonstrated trap lifetimes exceeding several days, attonewton force detection capability, and wide tunability in trapping and cooling parameters. Measurements have been performed with charged and neutral beads to calibrate the sensitivity of the detector. This work establishes the suitability of dual beam optical dipole traps for precision force measurement in high vacuum with long averaging times, and enables future applications including the study of gravitational inverse square law violations at short range, Casimir forces, acceleration sensing, and quantum opto-mechanics.
B.S./D.O. Dual Admission Program Illinois Institute of Technology and
Heller, Barbara
--Chicago College of Osteopathic Medicine Thank you for your interest in applying to the B.S./D.O. Dual Admission of Osteopathic Medicine. Osteopathic medicine is a complete system of medical care. The philosophy is to treat of your undergraduate degree at IIT provided you maintain satisfactory academic progress and a 3.5 GPA
Control-Oriented Model of a Dual Equal Variable Cam Timing Spark Ignition Engine
Stefanopoulou, Anna
control 1 Introduction. Modern automobile engines must satisfy the challenging and often con icting goals) 248-3611, Phone: (313) 322-1977 y Control Systems Laboratory, Department of Electrical EngineeringControl-Oriented Model of a Dual Equal Variable Cam Timing Spark Ignition Engine A. G
Peak Demand Reduction with Dual-Source Heat Pumps Using Municipal Water
Morehouse, J. H.; Khan, J. A.; Connor, L. N.; Pal, D.
1992-01-01T23:59:59.000Z
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...
Paytan, Adina
as 25.0%) at the SacramentoSan Joaquin River delta region give rise to a wide range of d18ONO3 valuesNitrogen sources and cycling in the San Francisco Bay Estuary: A nitrate dual isotopic composition18O) within the estuarine system of San Francisco (SF) Bay, California, to explore the utility
Peak Demand Reduction with Dual-Source Heat Pumps Using Municipal Water
Morehouse, J. H.; Khan, J. A.; Connor, L. N.; Pal, D.
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...
Turbine airfoil with dual wall formed from inner and outer layers separated by a compliant structure
Campbell; Christian X. (Oviedo, FL), Morrison; Jay A. (Oviedo, FL)
2011-12-20T23:59:59.000Z
A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a compliant structure. The compliant structure may be configured such that the outer layer may thermally expand without limitation by the inner layer. The compliant structure may be formed from a plurality of pedestals positioned generally parallel with each other. The pedestals may include a first foot attached to a first end of the pedestal and extending in a first direction aligned with the outer layer, and may include a second foot attached to a second end of the pedestal and extending in a second direction aligned with the inner layer.
Doughty, C.A.
1996-05-01T23:59:59.000Z
The hydrologic properties of heterogeneous geologic media are estimated by simultaneously inverting multiple observations from well-test data. A set of pressure transients observed during one or more interference tests is compared to the corresponding values obtained by numerically simulating the tests using a mathematical model. The parameters of the mathematical model are varied and the simulation repeated until a satisfactory match to the observed pressure transients is obtained, at which point the model parameters are accepted as providing a possible representation of the hydrologic property distribution. Restricting the search to parameters that represent fractal hydrologic property distributions can improve the inversion process. Far fewer parameters are needed to describe heterogeneity with a fractal geometry, improving the efficiency and robustness of the inversion. Additionally, each parameter set produces a hydrologic property distribution with a hierarchical structure, which mimics the multiple scales of heterogeneity often seen in natural geological media. Application of the IFS inverse method to synthetic interference-test data shows that the method reproduces the synthetic heterogeneity successfully for idealized heterogeneities, for geologically-realistic heterogeneities, and when the pressure data includes noise.
COLLEGE OF CHARLESTON DUAL EMPLOYMENT POLICY
Kasman, Alex
COLLEGE OF CHARLESTON DUAL EMPLOYMENT POLICY (Revised and Effective 7/1/04) THE LANGUAGE USED IN THIS DOCUMENT DOES NOT CREATE AN EMPLOYMENT CONTRACT BETWEEN THE EMPLOYEE AND THE AGENCY. THIS DOCUMENT DOES TO OR INCONSISTENT WITH THE TERMS OF THIS PARAGRAPH CREATE ANY CONTRACT OF EMPLOYMENT. This document sets forth
P. S. Howe; N. D. Lambert; P. C. West
1997-09-09T23:59:59.000Z
We obtain a BPS soliton of the M theory fivebrane's equations of motion representing a supersymmetric self-dual string. The resulting solution is then dimensionally reduced and used to obtain 0-brane and (p-2)-brane solitons on D-p-branes.
Zhao, Kaiguang
2009-05-15T23:59:59.000Z
for realtime remote sensing platforms, e.g., to provide timely information for urgent applications. This study aims to develop an airborne profiling LiDAR system, featured with on-the-fly data processing, for near real- or real- time forest inventory...
Bhardwaj, Shubhendu
2012-01-01T23:59:59.000Z
in Weather Detection . . . . . . . . . . . . . . . . . .for S-Band Weather Radar . . . . . . . . . . . . . Dual-polpatterns of polarimetric weather radars,” Journal of
Cost Estimating, Analysis, and Standardization
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
1984-11-02T23:59:59.000Z
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
NONE
1990-12-01T23:59:59.000Z
The total-system life-cycle cost (TSLCC) analysis for the Department of Energy`s (DOE) Civilian Radioactive Waste Management Program is an ongoing activity that helps determine whether the revenue-producing mechanism established by the Nuclear Waste Policy Act of 1982 - a fee levied on electricity generated and sold by commercial nuclear power plants - is sufficient to cover the cost of the program. This report provides cost estimates for the sixth annual evaluation of the adequacy of the fee. The costs contained in this report represent a preliminary analysis of the cost impacts associated with the Secretary of Energy`s Report to Congress on Reassessment of the Civilian Radioactive Waste Management Program issued in November 1989. The major elements of the restructured program announced in this report which pertain to the program`s life-cycle costs are: a prioritization of the scientific investigations program at the Yucca Mountain candidate site to focus on identification of potentially adverse conditions, a delay in the start of repository operations until 2010, the start of limited waste acceptance at the monitored retrievable storage (MRS) facility in 1998, and the start of waste acceptance at the full-capability MRS facility in 2,000. Based on the restructured program, the total-system cost for the system with a repository at the candidate site at Yucca Mountain in Nevada, a facility for monitored retrievable storage (MRS), and a transportation system is estimated at $26 billion (expressed in constant 1988 dollars). In the event that a second repository is required and is authorized by the Congress, the total-system cost is estimated at $34 to $35 billion, depending on the quantity of spent fuel and high-level waste (HLW) requiring disposal. 17 figs., 17 tabs.
Cai, C. [CEA, LIST, 91191 Gif-sur-Yvette, France and CNRS, SUPELEC, UNIV PARIS SUD, L2S, 3 rue Joliot-Curie, 91192 Gif-sur-Yvette (France)] [CEA, LIST, 91191 Gif-sur-Yvette, France and CNRS, SUPELEC, UNIV PARIS SUD, L2S, 3 rue Joliot-Curie, 91192 Gif-sur-Yvette (France); Rodet, T.; Mohammad-Djafari, A. [CNRS, SUPELEC, UNIV PARIS SUD, L2S, 3 rue Joliot-Curie, 91192 Gif-sur-Yvette (France)] [CNRS, SUPELEC, UNIV PARIS SUD, L2S, 3 rue Joliot-Curie, 91192 Gif-sur-Yvette (France); Legoupil, S. [CEA, LIST, 91191 Gif-sur-Yvette (France)] [CEA, LIST, 91191 Gif-sur-Yvette (France)
2013-11-15T23:59:59.000Z
Purpose: Dual-energy computed tomography (DECT) makes it possible to get two fractions of basis materials without segmentation. One is the soft-tissue equivalent water fraction and the other is the hard-matter equivalent bone fraction. Practical DECT measurements are usually obtained with polychromatic x-ray beams. Existing reconstruction approaches based on linear forward models without counting the beam polychromaticity fail to estimate the correct decomposition fractions and result in beam-hardening artifacts (BHA). The existing BHA correction approaches either need to refer to calibration measurements or suffer from the noise amplification caused by the negative-log preprocessing and the ill-conditioned water and bone separation problem. To overcome these problems, statistical DECT reconstruction approaches based on nonlinear forward models counting the beam polychromaticity show great potential for giving accurate fraction images.Methods: This work proposes a full-spectral Bayesian reconstruction approach which allows the reconstruction of high quality fraction images from ordinary polychromatic measurements. This approach is based on a Gaussian noise model with unknown variance assigned directly to the projections without taking negative-log. Referring to Bayesian inferences, the decomposition fractions and observation variance are estimated by using the joint maximum a posteriori (MAP) estimation method. Subject to an adaptive prior model assigned to the variance, the joint estimation problem is then simplified into a single estimation problem. It transforms the joint MAP estimation problem into a minimization problem with a nonquadratic cost function. To solve it, the use of a monotone conjugate gradient algorithm with suboptimal descent steps is proposed.Results: The performance of the proposed approach is analyzed with both simulated and experimental data. The results show that the proposed Bayesian approach is robust to noise and materials. It is also necessary to have the accurate spectrum information about the source-detector system. When dealing with experimental data, the spectrum can be predicted by a Monte Carlo simulator. For the materials between water and bone, less than 5% separation errors are observed on the estimated decomposition fractions.Conclusions: The proposed approach is a statistical reconstruction approach based on a nonlinear forward model counting the full beam polychromaticity and applied directly to the projections without taking negative-log. Compared to the approaches based on linear forward models and the BHA correction approaches, it has advantages in noise robustness and reconstruction accuracy.
Dual Degree Program Engineering Majors
Subramanian, Venkat
that can detect potential security threats, created brain- computer interfaces allowing people to control & Engineering, students learn how to design control schemes for high-tech systems, such as fighter planes, operation, and control of processes in a variety of industries, such as petroleum, petrochemical, chemical
Adaptive upscaling with the dual mesh method
Guerillot, D.; Verdiere, S.
1997-08-01T23:59:59.000Z
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.
Design of dual frequency interferometric SAR
Kim, Y.; Edelstein, W.; Caro, E. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (United States)
1996-03-01T23:59:59.000Z
Using a spaceborne interferometric SAR, it is possible to produce a high resolution global topographic map with a height accuracy of several meters. However, frequency selection of the interferometric SAR is rather complicated due to interferometric phenomenology and atmospheric effects. In this paper, we propose a dual frequency interferometric SAR to achieve better understanding of interferometric height (especially for penetrable medium) and corresponding calibration and to remove the atmospheric effects. The selected frequencies are L- and Ku- bands. We also present a radar design and show that a light weight and efficient SAR can be designed using new technologies and dual frequency advantages even with two frequency radars in a single spacecraft. {copyright} {ital 1996 American Institute of Physics.}
Comerford, Julia M; Barrows, R Scott; Greene, Jenny E; Zakamska, Nadia L; Madejski, Greg M; Cooper, Michael C
2015-01-01T23:59:59.000Z
Dual active galactic nuclei (AGNs) and offset AGNs are kpc-scale separation supermassive black holes pairs created during galaxy mergers, where both or one of the black holes are AGNs, respectively. These dual and offset AGNs are valuable probes of the link between mergers and AGNs but are challenging to identify. Here we present Chandra/ACIS observations of 12 optically-selected dual AGN candidates at z < 0.34, where we use the X-rays to identify AGNs. We also present HST/WFC3 observations of 10 of these candidates, which reveal any stellar bulges accompanying the AGNs. We discover a dual AGN system with separation of 2.2 kpc, where the two stellar bulges have coincident [O III] and X-ray sources. This system is an extremely minor merger (460:1) that may include a dwarf galaxy hosting an intermediate mass black hole. We also find six single AGNs, and five systems that are either dual or offset AGNs with separations < 10 kpc. Four of the six dual AGNs and dual/offset AGNs are in ongoing major mergers, a...
Fabrication of dual porosity electrode structure
Smith, J.L.; Kucera, E.H.
1991-02-12T23:59:59.000Z
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.
Fabrication of dual porosity electrode structure
Smith, James L. (Lemont, IL); Kucera, Eugenia H. (Downers Grove, IL)
1991-01-01T23:59:59.000Z
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.
Twisted covariant noncommutative self-dual gravity
Estrada-Jimenez, S.; Garcia-Compean, H.; Obregon, O.; Ramirez, C. [Centro de Estudios en Fisica y Matematicas Basicas y Aplicadas, Universidad Autonoma de Chiapas, Calle 4 Oriente Norte 1428, Tuxtla Gutierrez, Chiapas (Mexico); Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del IPN, P.O. Box 14-740, 07000 Mexico D.F. (Mexico); Centro de Investigacion y de Estudios Avanzados del IPN, Unidad Monterrey, PIIT, Via del Conocimiento 201, Autopista nueva al Aeropuerto km 9.5, 66600, Apodaca Nuevo Leon (Mexico); Instituto de Fisica de la Universidad de Guanajuato, P.O. Box E-143, 37150, Leon Gto. (Mexico); Facultad de Ciencias Fisico Matematicas, Universidad Autonoma de Puebla, P.O. Box 1364, 72000, Puebla (Mexico)
2008-12-15T23:59:59.000Z
A twisted covariant formulation of noncommutative self-dual gravity is presented. The formulation for constructing twisted noncommutative Yang-Mills theories is used. It is shown that the noncommutative torsion is solved at any order of the {theta} expansion in terms of the tetrad and some extra fields of the theory. In the process the first order expansion in {theta} for the Plebanski action is explicitly obtained.
Exact Gravity Dual of a Gapless Superconductor
George Koutsoumbas; Eleftherios Papantonopoulos; George Siopsis
2009-06-17T23:59:59.000Z
A model of an exact gravity dual of a gapless superconductor is presented in which the condensate is provided by a charged scalar field coupled to a bulk black hole of hyperbolic horizon in asymptotically AdS spacetime. Below a critical temperature, the black hole acquires its hair through a phase transition while an electromagnetic perturbation of the background Maxwell field determines the conductivity of the boundary theory.
Design of a dual species atom interferometer for space
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; Lévčque, 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
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...
Iterative Self-Dual Reconstruction on Radar Image Recovery
Martins, Charles; Medeiros, Fatima; Ushizima, Daniela; Bezerra, Francisco; Marques, Regis; Mascarenhas, Nelson
2010-05-21T23:59:59.000Z
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.
Frequency tracking and parameter estimation for robust quantum state estimation
Ralph, Jason F. [Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom); Jacobs, Kurt [Department of Physics, University of Massachusetts at Boston, 100 Morrissey Blvd, Boston, Massachusetts 02125 (United States); Hill, Charles D. [Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Victoria 3010 (Australia)
2011-11-15T23:59:59.000Z
In this paper we consider the problem of tracking the state of a quantum system via a continuous weak measurement. If the system Hamiltonian is known precisely, this merely requires integrating the appropriate stochastic master equation. However, even a small error in the assumed Hamiltonian can render this approach useless. The natural answer to this problem is to include the parameters of the Hamiltonian as part of the estimation problem, and the full Bayesian solution to this task provides a state estimate that is robust against uncertainties. However, this approach requires considerable computational overhead. Here we consider a single qubit in which the Hamiltonian contains a single unknown parameter. We show that classical frequency estimation techniques greatly reduce the computational overhead associated with Bayesian estimation and provide accurate estimates for the qubit frequency.
Krumke, Sven O.
Simplex Algorithm 16. Primal-Dual Simplex Algorithm Horst W. HamacherVorlesung, Lineare Optimierung, Sommersemester 2009 Page 2 Dual Simplex Algorithm Dual Simplex Given: Simplex tableau which is dual feasible If simplex tableau is also primal feasible: STOP - Tableau is optimal · Choose dual pivot column
Dual Superconductor Mechanism of Confinement on the Lattice
P. Cea; L. Cosmai
1992-10-26T23:59:59.000Z
We investigate the dual superconductor mechanism of confinement for pure SU(2) lattice gauge theory in the maximally abelian gauge. We focus on the the dual Meissner effect. We find that the transverse distribution of the longitudinal chromoelectric field due to a static quark-antiquark pair satisfies the dual London equation. Moreover we show that the size of the flux tube scales according to asymptotic freedom.
Optimization Online - Parallelizing the dual revised simplex method
Q. Huangfu
2015-03-06T23:59:59.000Z
Mar 6, 2015 ... Abstract: This paper introduces the design and implementation of two parallel dual simplex solvers for general large scale sparse linear ...
Geothermal: Sponsored by OSTI -- Final Report: Geothermal Dual...
Office of Scientific and Technical Information (OSTI)
Final Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us HomeBasic Search About...
On parallelizing dual decomposition in stochastic integer programming
Miles Lubin
2012-10-09T23:59:59.000Z
Oct 9, 2012 ... Abstract: For stochastic mixed-integer programs, we revisit the dual decomposition algorithm of Car\\o{}e and Schultz from a computational ...
Initial Design of a Dual Fluidized Bed Reactor
Yun, Minyoung
2014-01-01T23:59:59.000Z
bed, Chemical Engineering Research and Design, Volume 90,Design of a Dual Fluidized Bed Reactor by Minyoung Yun Master of Science, Graduate Program in Chemical and Environmental Engineering
Lean NOx Reduction with Dual Layer LNT/SCR Catalysts
Broader source: Energy.gov (indexed) [DOE]
emerging 2 NSRSCR Technology Goal: Reduce PGM & minimize fuel penalty in meeting NOx emission targets (adapted from Gandhi et al., US Patent, 2007) 3 Fundamental Issues for Dual...
An Analytical Approach for Tail-Pipe Emissions Estimation with...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
An Analytical Approach for Tail-Pipe Emissions Estimation with Coupled Engine and Aftertreatment System An Analytical Approach for Tail-Pipe Emissions Estimation with Coupled...
Passive Infinite-Dimensional Descriptor Systems
Reis, Timo
-dimensional descriptor systems are electrical circuits with spatially distributed components [15] or heat exchanger of energy that is lost by the system. Io-passivity therefore means that the system cannot generate energy(A ) being the dual of D(A ) equipped with the graph norm of A (the dual of X is identified with X itself), B
Shafer, John M
2012-11-05T23:59:59.000Z
The three major components of this research were: 1. Application of minimally invasive, cost effective hydrogeophysical techniques (surface and borehole), to generate fine scale (~1m or less) 3D estimates of subsurface heterogeneity. Heterogeneity is defined as spatial variability in hydraulic conductivity and/or hydrolithologic zones. 2. Integration of the fine scale characterization of hydrogeologic parameters with the hydrogeologic facies to upscale the finer scale assessment of heterogeneity to field scale. 3. Determination of the relationship between dual-domain parameters and practical characterization data.
A test for market power exertion in the credit card industry with the dual solow residual
Meurisse, Mark P
2003-01-01T23:59:59.000Z
/fiy = p'y + p ? G/E, where G/E = MC and (p - G/E)/P = ? p'y/p = P = the Lerner (1934) Index', Hence, P gives an estimate of the non-competitive environment. The coefficient P under the null is 0. Marginal cost is given by (10) 6Ct G(Wtt Wrt) ? =MCt... competition, the markup is represented by (16) Cr(Wit& Wit) (1- P)Pt=MCt= The dual, or price-based Solow residual, is expressed as (17) ct, Awi, + (1 - ct t) ilwr t ? Ap, = -P (hp, - Awr t) + (1 - P)he t. This is representative of the difference in price...
Dual Superconductor Scenario of Confinement: A Systematic Study of Gribov Copy Effects
G. S. Bali; V. Bornyakov; M. Mueller Preussker; K. Schilling
1996-03-18T23:59:59.000Z
We perform a study of the effects from maximal abelian gauge Gribov copies in the context of the dual superconductor scenario of confinement, on the basis of a novel approach for estimation of systematic uncertainties from incomplete gauge fixing. We present numerical results, in SU(2) lattice gauge theory, using the overrelaxed simulated annealing gauge fixing algorithm. We find abelian and non-abelian string tensions to differ significantly, their ratio being 0.92(4) at BETA = 2.5115. An approximate factorization of the abelian potential into monopole and photon contributions has been confirmed, the former giving rise to the abelian string tension.
Dual Meissner effect and non-Abelian dual superconductivity in SU(3) Yang-Mills theory
Akihiro Shibata; Kei-Ichi Kondo; Toru Shinohara
2012-04-25T23:59:59.000Z
The dual Meissner effect is the promising mechanism for quark confinement. We have proposed a new formulation of SU(N) Yang-Mills (YM) theory on a lattice, which can extract the dominant mode for quark confinement in the gauge independent manner. In the last lattice conference, we have demonstrated by measuring the string tension from the Wilson loop average in the SU(3) YM theory that the restricted non-Abelian variable and the extracted non-Abelian magnetic monopoles play the dominant role in confinement of fundamental quarks (dominance in the string tension), in marked contrast to the Abelian projection. In this talk, we focus on the dual Meissner effect in SU(3) YM theory, which is examined by measuring the distribution of chromo-electric field strength created by a static quark-antiquark pair. We apply the new lattice formulation, and examine whether or not the non-Abelian dual superconductivity claimed by us is indeed a mechanism of quark confinement. We present a preliminary result of the direct evidence for the non-abelian dual Meissner effect, that is to say, restricted U(2)-field part of the flux tube plays the dominant role in the quark-antiquark potential.
Thermodynamic estimation: Ionic materials
Glasser, Leslie, E-mail: l.glasser@curtin.edu.au
2013-10-15T23:59:59.000Z
Thermodynamics establishes equilibrium relations among thermodynamic parameters (“properties”) and delineates the effects of variation of the thermodynamic functions (typically temperature and pressure) on those parameters. However, classical thermodynamics does not provide values for the necessary thermodynamic properties, which must be established by extra-thermodynamic means such as experiment, theoretical calculation, or empirical estimation. While many values may be found in the numerous collected tables in the literature, these are necessarily incomplete because either the experimental measurements have not been made or the materials may be hypothetical. The current paper presents a number of simple and relible estimation methods for thermodynamic properties, principally for ionic materials. The results may also be used as a check for obvious errors in published values. The estimation methods described are typically based on addition of properties of individual ions, or sums of properties of neutral ion groups (such as “double” salts, in the Simple Salt Approximation), or based upon correlations such as with formula unit volumes (Volume-Based Thermodynamics). - Graphical abstract: Thermodynamic properties of ionic materials may be readily estimated by summation of the properties of individual ions, by summation of the properties of ‘double salts’, and by correlation with formula volume. Such estimates may fill gaps in the literature, and may also be used as checks of published values. This simplicity arises from exploitation of the fact that repulsive energy terms are of short range and very similar across materials, while coulombic interactions provide a very large component of the attractive energy in ionic systems. Display Omitted - Highlights: • Estimation methods for thermodynamic properties of ionic materials are introduced. • Methods are based on summation of single ions, multiple salts, and correlations. • Heat capacity, entropy, lattice energy, enthalpy, Gibbs energy values are available.
Gravity dual of spatially modulated phase
Nakamura, Shin [Department of Physics, Kyoto University, Kyoto 606-8502 (Japan); Ooguri, Hirosi [California Institute of Technology, Pasadena, California 91125 (United States); IPMU, University of Tokyo, Kashiwa 277-8586 (Japan); Park, Chang-Soon [California Institute of Technology, Pasadena, California 91125 (United States)
2010-02-15T23:59:59.000Z
We show that the five-dimensional Maxwell theory with the Chern-Simons term is tachyonic in the presence of a constant electric field. When coupled to gravity, a sufficiently large Chern-Simons coupling causes instability of the Reissner-Nordstroem black holes in anti-de Sitter space. The instability happens only at nonvanishing momenta, suggesting a spatially modulated phase in the holographically dual quantum field theory in (3+1) dimensions, with spontaneous current generation in a helical configuration. The three-charge extremal black hole in the type IIB superstring theory on AdS{sub 5}xS{sup 5} barely satisfies the stability condition.
Dual stage active magnetic regenerator and method
Pecharsky, V.K.; Gschneidner, K.A. Jr.
1999-03-30T23:59:59.000Z
A dual stage active magnetic regenerator refrigerator as well as method using the Joule-Brayton thermodynamic cycle includes a high temperature stage refrigerant comprising DyAl{sub 2} or (Dy{sub 1{minus}x}Er{sub x})Al{sub 2} where x is selected to be greater than 0 and less than about 0.3 in combination with a low temperature stage comprising (Dy{sub 1{minus}x}Er{sub x})Al{sub 2} where x is selected to be greater than about 0.5 and less than 1 to provide significantly improved refrigeration efficiency in the liquefaction of gaseous hydrogen. 17 figs.
Dual stage active magnetic regenerator and method
Pecharsky, Vitalij K. (Ames, IA); Gschneidner, Jr., Karl A. (Ames, IA)
1999-03-30T23:59:59.000Z
A dual stage active magnetic regenerator refrigerator as well as method using the Joule-Brayton thermodynamic cycle includes a high temperature stage refrigerant comprising DyAl.sub.2 or (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than 0 and less than about 0.3 in combination with a low temperature stage comprising (Dy.sub.1-x Er.sub.x)Al.sub.2 where x is selected to be greater than about 0.5 and less than 1 to provide significantly improved refrigeration efficiency in the liquefaction of gaseous hydrogen.
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4 Self-Scrubbing:,, , ., ..., ,+ .-detonation7 ComparisonDryNovel Dual
Flavor independence and the dual superconducting model of QCD
Fulcher, L.P. [Department of Physics and Astronomy, Bowling Green State University, Bowling Green, Ohio 43403 (United States)] [Department of Physics and Astronomy, Bowling Green State University, Bowling Green, Ohio 43403 (United States)
1998-01-01T23:59:59.000Z
Baker, Ball, and Zachariasen (BBZ) have developed an elegant formulation of the dual superconducting model of quantum chromodynamics (QCD), which allows one to use the field equations to eliminate the gluon and Higgs degrees of freedom and thus to express the interaction between quarks as an effective potential. Carrying out an expansion in inverse powers of the constituent quark masses, these authors succeeded in identifying the central part, the spin-dependent part, and the leading relativistic corrections to the central potential. The potential offers a good account of the energies and splittings of charmonium and the upsilon system. Since all of the flavor dependence of the interaction is presumed to enter through the constituent masses, it is possible to test the potential in other systems. Logical candidates are the heavy B-flavor charmed system and the heavy-light systems, which should be more sensitive to the relativistic corrections. Lattice gauge calculations furnish an additional point of contact for the components of the BBZ potential. Some preliminary calculations of the energies of B and D mesons are presented and the challenge of agreement with experiment is discussed. The spinless Salpeter equation is used to account for the effects of relativistic kinematics. {copyright} {ital 1997} {ital The American Physical Society}
Ghazali, Zayba
2011-06-29T23:59:59.000Z
OBJECTIVES: This study aimed to explore age-related differences in dual-tasking. Previous studies report no age-effects in dual-tasking among healthy individuals in comparison to severe dual-tasking impairment in Alzheimer’s ...
CARBON ATOM DISTRIBUTION IN A DUAL PHASE STEEL: AN ATOM PROBE STUDY
Barnard, S.J.
2014-01-01T23:59:59.000Z
ATOM DISTRIBUTION IN A DUAL PHASE STEEL: AN ATOM PROBE STUDY~4720 1 U.S.A. IntroductioE. Dual Phase steels are currentlymartensite-austenite dual phase steel, although the results
DESIGN OF DUAL PHASE Fe/Mn/C STEEL FOR LOW TEMPERATURE APPLICATION
Kim, Nack-Joon
2013-01-01T23:59:59.000Z
and Properties of Dual- Phase Steels, R. A. Kot and J. \\4.and Properties of Dual Phase Steels, R. A. Kot and J. W. ~Formable HSLA and Dual- Phase Steels, A. T. Davenport, ed. ,
R. A. d'Inverno; P. Lambert; J. A. Vickers
2006-04-20T23:59:59.000Z
In this paper we obtain a 2+2 double null Hamiltonian description of General Relativity using only the (complex) SO(3) connection and the components of the complex densitised self-dual bivectors. We carry out the general canonical analysis of this system and obtain the first class constraint algebra entirely in terms of the self-dual variables. The first class algebra forms a Lie algebra and all the first class constraints have a simple geometrical interpretation.
Zhao,L.; Zhao,X.; Hu,A.
2014-01-01T23:59:59.000Z
The Exploration on the Energy Saving Potential of an Innovative Dual-temperature Air Conditioner and the Mechanism of the Theoretical Mixed Refrigeration Cycle Zhao Lei, Zhao Xijin, Hu Andu Professor, graduate student, graduate student...-temperature air conditioning system and its corresponding theoretical mixed refrigeration cycle are proposed. This consists of a separate air handling unit and a metal radiation panel as the dual-temperature evaporators, a compressor, a condenser, two thermal...
Top hole drilling with dual gradient technology to control shallow hazards
Elieff, Brandee Anastacia Marie
2006-10-30T23:59:59.000Z
Injection Dual Gradient System13 .....................14 Fig. 6 - SubSea Rock Crushing Assembly Used in SubSea MudLift JIPI .......................16 Fig. 7 - Illustration of a Cross Section of a Diaphragm Positive Displacement PumpI ...17 Fig. 8... Pressure Plotted versus Depth.......66 Fig. 34 - Wellbore and Subsea Pump Pressures Example Graph.....................................68 Fig. 35 - Pressure at the Top of the Kick in Run 4...........................................................70 Fig...
Boyer, Edmond
-output nutrient mass balances 675 Hydrology and Earth System Sciences, 9(6), 675684 (2005) Â© EGU Uncertainty of stream nutrient retention/release under a wide spectrum of hydrological conditions. Providing good estimates of the mass balances for nutrients depends on precise hydrological monitoring and good chemical
Risk-Averse Stochastic Dual Dynamic Programming
2013-02-27T23:59:59.000Z
Feb 27, 2013 ... performance of the standard upper bound estimator in the ...... where I[·] is the indicator function that takes value one if its argument is true and ...
The SU(2) Confining Vacuum as a Dual Superconductor
Paolo Cea; Leonardo Cosmai
1995-09-08T23:59:59.000Z
We investigate the dual superconductivity hypothesis in pure SU(2) lattice gauge theory. We find evidence of the dual Meissner effect both in the maximally Abelian gauge and without gauge fixing. We also obtain a rather good extimation of the string tension using the value of the London penetration length.
Dual Templating Synthesis of Mesoporous Titanium Nitride Microspheres
Suslick, Kenneth S.
Dual Templating Synthesis of Mesoporous Titanium Nitride Microspheres By Jin Ho Bang and Kenneth S pyrolysis (USP) preparation of hierarchically nanostructured titanium nitride (TiN) using an in situ dual as a nitrogen source.[5b,7] Several attempts have been made toward the preparation of nanostructured TiN,[5a,6a
Dual-Phase Hot-Press Forming Alloy
Cambridge, University of
of the fully martensitic alloys; In terms of uniform elongation, the dualphase steel significantly outperformsDual-Phase Hot-Press Forming Alloy Hongliang Yi and H. K. D. H. Bhadeshia 23 April, 2010Non-propagating cracks in ferrite 840 oC 880 oC #12;Conclusion 6 · Conventional HPF steels: fully martensitic · Novel
Overview of the Theory of Self-Dual Fields
Garfunkel, Eric
and differential K theory · The general self-dual QFT · Open problems. #12;Introduction Chiral fields are very Fermion Indeed, for R2 =2 there are four reps of the chiral algebra: 1, e± i 2 , ei From this viewpoint, the dependence on spin structure is obvious. Free fermion: = ei Self-dual field is equivalent to the theory
ON ALTERNATE DUAL FRAMES JIMMY DILLIES AND JULIEN GIOL
Dillies, Jimmy
ON ALTERNATE DUAL FRAMES JIMMY DILLIES AND JULIEN GIOL Abstract. The set of alternate duals convenient to introduce the projection pX : l2 (J) - Im X l2 (J) 1 #12;2 JIMMY DILLIES AND JULIEN GIOL onto
Metabolic complementarity and genomics of the dual bacterial symbiosis of sharpshooters
2006-01-01T23:59:59.000Z
Metabolic Complementarity and Genomics of the Dual BacterialMetabolic complementarity and genomics of the dual bacterialthe other. ) Comparative genomics. The predicted proteomes
A Universal Dual-Fuel Controller for OEM/Aftermarket Diesel Engineswit...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Dual-Fuel Controller for OEMAftermarket Diesel Engineswith Comprehensive Fuel & Emission Control A Universal Dual-Fuel Controller for OEMAftermarket Diesel Engineswith...
Paris-Sud XI, Université de
]-[5], multi-motor structures [6] or dual-star stator machines [7]-[8], etc. D hal-00628764,version1-4Oct2011 of additional end-winding length, the series [9] or parallel [6] motor connections need more system volume than the Variable Stator Vane (VSV) of aircraft. In VSV application, the electrical machine is applied to control
A&S/Business Dual Major 1 of 10 June 30, 2008 A&S/Business Dual Major
Jiang, Huiqiang
A&S/Business Dual Major 1 of 10 June 30, 2008 A&S/Business Dual Major Business Programs degree options for programs in business: Â· Students enrolled in the College of Business Administration (CBA) earn a Bachelor of Science in Business Administration (BSBA) degree and major in Accounting
Zhang, M.
2013-04-01T23:59:59.000Z
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.
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
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.
Stabilizing dual-energy X-ray computed tomography reconstructions using patch-based regularization
Tracey, Brian H
2014-01-01T23:59:59.000Z
Recent years have seen growing interest in exploiting dual- and multi-energy measurements in computed tomography (CT) in order to characterize material properties as well as object shape. Material characterization is performed by decomposing the scene into constitutive basis functions, such as Compton scatter and photoelectric absorption functions. While well motivated physically, the joint recovery of the spatial distribution of photoelectric and Compton properties is severely complicated by the fact that the data are several orders of magnitude more sensitive to Compton scatter coefficients than to photoelectric absorption, so small errors in Compton estimates can create large artifacts in the photoelectric estimate. To address these issues, we propose a model-based iterative approach which uses patch-based regularization terms to stabilize inversion of photoelectric coefficients, and solve the resulting problem though use of computationally attractive Alternating Direction Method of Multipliers (ADMM) solu...
Saitou, Kazuhiro "Kazu"
1 Microelectromechanical Systems Opportunities A Department of Defense Dual-Use Technology Microelectromechanical Systems Opportunities Defense Applications of MEMS Experiences in recent conflicts
Synthesis of ZSM-23/ZSM-22 intergrowth zeolite with a novel dual-template strategy
Wang, Bingchun, E-mail: wangbc@dicp.ac.cn [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China) [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Tian, Zhijian, E-mail: tianz@dicp.ac.cn [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China) [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Li, Peng; Wang, Lei; Xu, Yunpeng; Qu, Wei; Ma, Huaijun; Xu, Zhusheng [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)] [National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Lin, Liwu [State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)] [State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)
2009-12-15T23:59:59.000Z
ZSM-23/ZSM-22 intergrowth zeolite with fixed proportion of 60%ZSM-23/40%ZSM-22 has been synthesized with a novel dual-template strategy. The products were characterized by X-ray diffraction and scanning electron microscopy. Dimethylamine and diethylamine were used together as a dual-template system. The molar ratio of diethylamine to dimethylamine, which was changed with the type of aluminum source, was the key factor for the synthesis of intergrowth zeolites. A molar ratio of diethylamine to dimethylamine of 1:24 could result in an ZSM-23/ZSM-22 intergrowth zeolite if aluminum sulfate was used as aluminum source, whereas a molar ratio of diethylamine to dimethylamine of 1:12 was required to get an ZSM-23/ZSM-22 intergrowth zeolite if sodium metaaluminate was used. Furthermore, fluoride anion could be involved in the process as a crystallization promoter.
Dual Superconductor Picture for Strongly-coupled SU(2) Yang-Mills Theory
Duoje Jia; Yi-shi Duan
2006-05-18T23:59:59.000Z
A new framework that fulfills the dual superconductor picture is proposed for the strongly-coupled Yang-Mills theory. This framework is based on the idea that at the classic level the strong-coupling limit of the theory vacuum behaves as a back hole with regard to colors in the sense of the effective field theory, and the theory variables undergo an ultraviolet/infrared scale separation. We show that at the quantum level the strong-coupled theory vacuum is made up of a Bose-condensed many-body system of magnetic charges. We further check this framework by reproducing the dual Abelian-Higgs model from the Yang-Mills theory and the predicting the vacuum type of the theory which is very near to the border between type-I and type-II superconductors and remarkably consistent with the recent simulations.
Dual energy scanning beam laminographic x-radiography
Majewski, Stanislaw (Grafton, VA); Wojcik, Randolph F. (Yorktown, VA)
1998-01-01T23:59:59.000Z
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.
Indirect-fired gas turbine dual fuel cell power cycle
Micheli, Paul L. (Sacramento, CA); Williams, Mark C. (Morgantown, WV); Sudhoff, Frederick A. (Morgantown, WV)
1996-01-01T23:59:59.000Z
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.
Dual energy scanning beam laminographic x-radiography
Majewski, S.; Wojcik, R.F.
1998-04-21T23:59:59.000Z
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.
Design of a dual species atom interferometer for space
Thilo Schuldt; Christian Schubert; Markus Krutzik; Lluis Gesa Bote; Naceur Gaaloul; Jonas Hartwig; Holger Ahlers; Waldemar Herr; Katerine Posso-Trujillo; Jan Rudolph; Stephan Seidel; Thijs Wendrich; Wolfgang Ertmer; Sven Herrmann; André Kubelka-Lange; Alexander Milke; Benny Rievers; Emanuele Rocco; Andrew Hinton; Kai Bongs; Markus Oswald; Matthias Franz; Matthias Hauth; Achim Peters; Ahmad Bawamia; Andreas Wicht; Baptiste Battelier; Andrea Bertoldi; Philippe Bouyer; Arnaud Landragin; Didier Massonnet; Thomas Lévčque; Andre Wenzlawski; Ortwin Hellmig; Patrick Windpassinger; Klaus Sengstock; Wolf von Klitzing; Chris Chaloner; David Summers; Philip Ireland; Ignacio Mateos; Carlos F. Sopuerta; Fiodor Sorrentino; Guglielmo M. Tino; Michael Williams; Christian Trenkel; Domenico Gerardi; Michael Chwalla; Johannes Burkhardt; Ulrich Johann; Astrid Heske; Eric Wille; Martin Gehler; Luigi Cacciapuoti; Norman Gürlebeck; Claus Braxmaier; Ernst Rasel
2014-12-08T23:59:59.000Z
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, the detection unit, the vacuum system for $10^{-11}$ mbar ultra-high vacuum generation, and the high-suppression factor magnetic shielding as well as the thermal control system. The laser system is based on a hybrid approach using fiber-based telecom components and high-power laser diode technology and includes all laser sources for 2D-MOT, 3D-MOT, ODT, interferometry and detection. Manipulation and switching of the laser beams is carried out on an optical bench using Zerodur bonding technology. The instrument consists of 9 units with an overall mass of 221 kg, an average power consumption of 608 W (819 W peak), and a volume of 470 liters which would well fit on a satellite to be launched with a Soyuz rocket, as system studies have shown.
attitude stability system: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
such as Gravity Gradient stabilization, (more) Rawashdeh, Samir Ahmed 2010-01-01 3 Design of Attitude Stability System for Prolate Dual-spin Satellite in Its Inclined...
Selection of Long-Term Reference Frames in Dual-Frame Video Coding Using Simulated Annealing
Tiwari, M.; Cosman, P. C.
2008-01-01T23:59:59.000Z
Index Terms—Dual-frame video coding, long-term reference frame, simulated annealing, video compression.
A high performance dual revised simplex solver Julian Hall, Qi Huangfu and Edmund Smith
Hall, Julian
A high performance dual revised simplex solver Julian Hall, Qi Huangfu and Edmund Smith School of Mathematics University of Edinburgh 2nd December 2010 A high performance dual revised simplex solver #12;Overview · LP problems and the dual simplex method · Why use dual simplex method · Why exploit parallelism
An Efficient Primal-Dual Hybrid Gradient Algorithm For Total Variation Image Restoration
Soatto, Stefano
compared to unconstrained optimizations. Being quadratic, the dual energy is less nonlinear than the primal
Dual Extremum Principles in Finite Deformation Theory with Applications to Post-Buckling Analysis
Gao, David Yang
, 1976; Auchmuty, 1983). The symmetry be- tween the primal and dual energy principles is amaz- ingly
An Infeasible InteriorPoint Algorithm for Solving Primal and Dual Geometric Programs \\Lambda
Ye, Yinyu
with the classical, arithmetic/geometric inequality--based dual geometric programming problem, see [20]. However
Global oceanic rainfall estimation from AMSR-E data based on a radiative transfer model
Jin, Kyoung-Wook
2006-04-12T23:59:59.000Z
retrieval uncertainties. The algorithm uses six channels (dual polarizations at 36.5, 18.7 and 10.65GHz) and retrieves rain rates on a pixel-by-pixel basis. Monthly rain totals are estimated by summing average rain rates computed by merging six rain rates...
Bashkatov, A N; Genina, Elina A; Kochubei, V I; Tuchin, Valerii V [Department of Optics and Biomedical Physics, N.G.Chernyshevskii Saratov State University (Russian Federation)
2006-12-31T23:59:59.000Z
Based on the digital image analysis and inverse Monte-Carlo method, the proximate analysis method is deve-loped and the optical properties of hairs of different types are estimated in three spectral ranges corresponding to three colour components. The scattering and absorption properties of hairs are separated for the first time by using the inverse Monte-Carlo method. The content of different types of melanin in hairs is estimated from the absorption coefficient. It is shown that the dominating type of melanin in dark hairs is eumelanin, whereas in light hairs pheomelanin dominates. (special issue devoted to multiple radiation scattering in random media)
Dual Models of Permutation Problems Barbara M. Smith
Smith, Barbara M.
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
apparent dual function: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Summary: Up till now primal-dual IPMs all use the Newton direction as the search ... in terms of the kernel function and its first and second derivative. .... outer iteration by...
antigens confer dual: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
to the variation of the process (temperature of austeno-ferritic heat. The dual-phase is a steel composed of ferrite and martensite phases. Each phase can be considered...
Dual Superconductivity and Chiral Symmetry in Full QCD
J. M. Carmona; M. D'Elia; L. Del Debbio; A. Di Giacomo; B. Lucini; G. Paffuti
2001-10-12T23:59:59.000Z
A disorder parameter detecting dual superconductivity of the vacuum is measured across the chiral phase transition in full QCD with two flavours of dynamical staggered fermions. The observed behaviour is similar to the quenched case.
EIS-0228: Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility
Broader source: Energy.gov [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)...
Primal-dual coding to probe light transport
O'Toole, Matthew
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 ...
York Electric Cooperative- Dual Fuel Heat Pump Rebate Program
Broader source: Energy.gov [DOE]
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...
A Dual Ascent Procedure for Large Scale Uncapacitated Network Design
Balakrishnan, Anantaram
The fixed-charge network design problem arises in a variety of problem contexts including transportation, communication, and production scheduling.We develop a family of dual ascent algorithms for this problem. This approach ...
A Gravity Dual of Metastable Dynamical Supersymmetry Breaking
DeWolfe, Oliver; /Colorado U.; Kachru, Shamit; Mulligan, Michael; /Stanford U., Phys. Dept. /SLAC
2008-02-04T23:59:59.000Z
Metastable, supersymmetry-breaking configurations can be created in flux geometries by placing antibranes in warped throats. Via gauge/gravity duality, such configurations should have an interpretation as supersymmetry-breaking states in the dual field theory. In this paper, we perturbatively determine the asymptotic supergravity solutions corresponding to D3-brane probes placed at the tip of the cascading warped deformed conifold geometry, which is dual to an SU(N+M) x SU(N) gauge theory. The backreaction of the antibranes has the effect of introducing imaginary anti-self-dual flux, squashing the compact part of the space and forcing the dilaton to run. Using the generalization of holographic renormalization to cascading geometries, we determine the expectation values of operators in the dual field theory in terms of the asymptotic values of the supergravity fields.
Multiplexing video streams using dual-frame video coding
Tiwari, M; Groves, T; Cosman, P C
2008-01-01T23:59:59.000Z
novel idea for multiplexing video streams was to combine theLTR frames in dual-frame video coding with EqualSlope. T.Luthra, “Overview of the H.264/AVC video coding standard,”
adaptive parameter estimation: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Tokamak Heat Computer Technologies and Information Sciences Websites Summary: . Keywords: Thermonuclear fusion, distributed parameter systems, input state and parameter estimation,...
Digitized dual wavelength radar data from a Texas thunderstorm
Radlein, Robin Ann
1977-01-01T23:59:59.000Z
DIGITIZED DUAL WAVL'LENGTH RADAR DATA FROM A TEXAS THUNDERSTORM A Thesis ROBIN ANN RADLEIN Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree ol MASTER OF SCIENCE December 1977... Wavelength Radar Data from a Texas Thunderstorm. (December 1977) Robin Ann Radlein~ B. S , Texas ASN University Chairman of Advisory Committee: Dr Vance Noyer Nulti-tilt digitized dual wavelength radar data collected during a Texas thunderstorm were...
Fuel cell having dual electrode anode or cathode
Findl, E.
1984-04-10T23:59:59.000Z
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.
Dual-band infrared capabilities for imaging buried object sites
Del Grande, N.K.; Durbin, P.F.; Gorvad, M.R.; Perkins, D.E.; Clark, G.A.; Hernandez, J.E.; Sherwood, R.J.
1993-04-02T23:59:59.000Z
We discuss dual-band infrared (DBIR) capabilities for imaging buried object sizes. We identify physical features affecting thermal contrast needed to distinguish buried object sites from undisturbed sites or surface clutter. Apart from atmospheric transmission and system performance, these features include: object size, shape, and burial depth; ambient soil, disturbed soil and object site thermal diffusivity differences; surface temperature, emissivity, plant-cover, slope, albedo and roughness variations; weather conditions and measurement times. We use good instrumentation to measure the time-varying temperature differences between buried object sites and undisturbed soil sites. We compare near surface soil temperature differences with radiometric infrared (IR) surface temperature differences recorded at 4.7 {plus_minus} 0.4 {mu}m and at 10.6 {plus_minus} 1.0 {mu}m. By producing selective DBIR image ratio maps, we distinguish temperature-difference patterns from surface emissivity effects. We discuss temperature differences between buried object sites, filled hole site (without buried objects), cleared (undisturbed) soil sites, and grass-covered sites (with and without different types of surface clutter). We compare temperature, emissivity-ratio, visible and near-IR reflectance signatures of surface objects, leafy plants and sod. We discuss the physical aspects of environmental, surface and buried target features affecting interpretation of buried targets, surface objects and natural backgrounds.
DUAL HALOS AND FORMATION OF EARLY-TYPE GALAXIES
Park, Hong Soo; Lee, Myung Gyoon, E-mail: hspark@astro.snu.ac.kr, E-mail: mglee@astro.snu.ac.kr [Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul (Korea, Republic of)
2013-08-20T23:59:59.000Z
We present a determination of the two-dimensional shape parameters of the blue and red globular cluster systems (GCSs) in a large number of elliptical galaxies and lenticular galaxies (early-type galaxies, called ETGs). We use a homogeneous data set of the globular clusters in 23 ETGs obtained from the HST/ACS Virgo Cluster Survey. The position angles of both blue and red GCSs show a correlation with those of the stellar light distribution, showing that the major axes of the GCSs are well aligned with those of their host galaxies. However, the shapes of the red GCSs show a tight correlation with the stellar light distribution as well as with the rotation property of their host galaxies, while the shapes of the blue GCSs do much less. These provide clear geometric evidence that the origins of the blue and red globular clusters are distinct and that ETGs may have dual halos: a blue (metal-poor) halo and a red (metal-rich) halo. These two halos show significant differences in metallicity, structure, and kinematics, indicating that they are formed in two distinguishable ways. The red halos might have formed via dissipational processes with rotation, while the blue halos are through accretion.
Chen, Sheng
output is a linear combination of non- linear basis functions. Provided that there is a separate and linear algebra are directly applicable. Moreover by applying linear regression statistical techniques-estimator and D-optimality Model Construction using Orthogonal Forward Regression Xia Hong, Senior Member, IEEE
Reliability Technology Solutions and funding in part by the Assistant Secretary for Energy Efficiency Vickie E. Lynch Bertrand Nkei David E. Newman Abstract-- We compare and test statistical estimates and Renewable Energy, Office of Power Technologies, Transmission Reliability Program of the U.S. Department
Dual excitation acoustic paramagnetic logging tool
Vail, III, William B. (Bothell, WA)
1989-01-01T23:59:59.000Z
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.
Dual excitation acoustic paramagnetic logging tool
Vail, W.B. III.
1989-02-14T23:59:59.000Z
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.
Dual Origin of Pairing in Nuclei
A. Idini; G. Potel; F. Barranco; E. Vigezzi; R. A. Broglia
2014-04-29T23:59:59.000Z
An essentially "complete" description of the low-energy nuclear structure of the superfluid nucleus $^{120}$Sn and of its odd-$A$ neighbors is provided by the observations carried out with the help of Coulomb excitation and of one-- and of two-- particle transfer reactions, specific probes of vibrations, quasiparticle and pairing degrees of freedom respectively, and of their mutual couplings. These experimental findings are used to stringently test the predictions of a similarly "complete" description of $^{119,120,121}$Sn carried out in terms of elementary modes of excitation which, through their interweaving, melt together into effective fields, each displaying properties reflecting that of all others, there individuality resulting from the actual relative importance of each one. Its implementation is done by solving the Nambu-Gor'kov equations including, for the first time, all medium polarization effects resulting from the interweaving of quasiparticles, spin and surface vibrations, taking into account, within the framework of nuclear field theory (NFT), the variety of processes leading to self-energy, vertex and Pauli principle corrections, and to the induced pairing interaction. Theory provides an overall quantitative account of the experimental findings. From these results one can, not only obtain strong circumstantial evidence for the inevitability for the dual origin of pairing in nuclei but also, extract information which can be used at profit to quantitatively disentangle the contributions to pairing correlations in general and to the pairing gap in particular, arising from the bare and from the induced pairing interactions.
Ventilation Air Preconditioning Systems
Khattar, M.; Brandemuehl, M. J.
1996-01-01T23:59:59.000Z
simply and cost-effectively with a dual path arrangement that treats and controls the ventilation air independently of the recirculation air. The Electric Power Research Institute (EPRI)--the nonprofit R&D arm of the electric utility industry... particular type of application. EPRI is developing variations of the dual path concept to meet different reeofit and new construction markets. Figure 6. Ventilation Air Conditioner as a Separate Unit EPRVCALMAC System: Separate Unit for Ventilation Air...
Optical Flow Estimation versus Motion Estimation Draft: Anita Sellent
Heermann, Dieter W.
. In the proposed challenge we aim to estimate the physical motion of objects. In industrial applications in the Camera System In industrial applications, sufficient illumination cannot always be provided. This can in the path of a robot or the trajectories of objects [7,12,13,17]. Video cameras provide information
Dual mode fuel injection system and fuel injector for same |...
Office of Scientific and Technical Information (OSTI)
to produce two different spray patterns depending on the positioning of a needle control valve member. Positioning of the needle control valve member determines which of the...
SYSTEMS AND CONTROL ENGINEERING Dual Degree Program Course Requirements
Rollins, Andrew M.
Dynamics, Heat and Mass Transfer 4 Elementary thermodynamic concepts: first and second laws, and equilibrium. Basic fluid dynamics, heat transfer, and mass transfer: microscopic and macroscopic perspectives, Mass & Heat Transfer 4 0 4 EECS 281 Computer Org, Logic Design 3 2 4 EECS 313 Signal Processing 3 0 3
A DualDisk File System: ext4 Mihai Budiu
Budiu, Mihai
uranium oxide, UO2 [8,4] and hexavalent uranium based fluorides, UF6 [5], oxides, CaUO4 [9] and CdUO4 [10
Dual beam optical system for pulsed laser ablation film deposition
Mashburn, Douglas N. (Knoxville, TN)
1996-01-01T23:59:59.000Z
A laser ablation apparatus having a laser source outputting a laser ablation beam includes an ablation chamber having a sidewall, a beam divider for dividing the laser ablation beam into two substantially equal halves, and a pair of mirrors for converging the two halves on a surface of the target from complementary angles relative to the target surface normal, thereby generating a plume of ablated material emanating from the target.
Dual beam optical system for pulsed laser ablation film deposition
Mashburn, D.N.
1996-09-24T23:59:59.000Z
A laser ablation apparatus having a laser source outputting a laser ablation beam includes an ablation chamber having a sidewall, a beam divider for dividing the laser ablation beam into two substantially equal halves, and a pair of mirrors for converging the two halves on a surface of the target from complementary angles relative to the target surface normal, thereby generating a plume of ablated material emanating from the target. 3 figs.
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
1997-03-28T23:59:59.000Z
This chapter focuses on the components (or elements) of the cost estimation package and their documentation.
Mass Production Cost Estimation of Direct Hydrogen PEM Fuel Cell...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Hydrogen PEM Fuel Cell Systems for Transportation Applications: 2012 Update Mass Production Cost Estimation of Direct Hydrogen PEM Fuel Cell Systems for Transportation...
Check Estimates and Independent Costs
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
1997-03-28T23:59:59.000Z
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.
Paris-Sud XI, Université de
Filtre de Kalman `a deux ´etages pour l'estimation d'´etat et de d´efauts de syst´e.Ragot@ensem.inpl-nancy.fr R´esum´e Dans cette communication, on propose d'utiliser le filtre de Kalman `a deux ´etages pour- timation de d´efaut, d´ecouplage, filtre de Kalman `a ´etat augment´e, filtre de Kalman `a deux ´etages. 1
Cha, K. S.; Kim, T. K.; Park, M. S.
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...
N. Cardoso; M. Cardoso; P. Bicudo
2012-11-19T23:59:59.000Z
The colour fields, created by a static gluon-quark-antiquark system, are computed in quenched SU(3) lattice QCD, in a $24^3\\times 48$ lattice at $\\beta=6.2$ and $a=0.07261(85)\\,fm$. We compute the hybrid Wilson Loop including the cases when the gluon and the antiquark are superposed, i. e., the quark-antiquark case and when the quark and antiquark are superposed, i. e., the gluon-gluon case. The Casimir scaling is investigated, in the two gluon glueball case the Casimir scaling is consistent with the formation of an adjoint string. Measuring the decay of the tail in the mid section of the flux tube for the two gluon glueball and for the quark-antiquark meson, we determine the penetration length and present a gauge invariant effective dual gluon mass of $0.905\\pm0.163\\,\\text{GeV}$. We also try to determine the coherence length comparing our results with the dual Ginzburg-Landau approach. With the penetration length and the possible coherence length we determine a putative Ginzburg-Landau dimensionless parameter, which is possibly consistent with a type II superconductor picture. These results are obtained at fixed quark-antiquark distance of 0.58 fm.
Dual shell pressure balanced reactor vessel. Final project report
Robertus, R.J.; Fassbender, A.G.
1994-10-01T23:59:59.000Z
The Department of Energy`s Office of Energy Research (OER) has previously provided support for the development of several chemical processes, including supercritical water oxidation, liquefaction, and aqueous hazardous waste destruction, where chemical and phase transformations are conducted at high pressure and temperature. These and many other commercial processes require a pressure vessel capable of operating in a corrosive environment where safety and economy are important requirements. Pacific Northwest Laboratory (PNL) engineers have recently developed and patented (U.S. patent 5,167,930 December 1, 1992) a concept for a novel Dual Shell Pressure Balanced Vessel (DSPBV) which could solve a number of these problems. The technology could be immediately useful in continuing commercialization of an R&D 100 award-winning technology, Sludge-to-oil Reactor System (STORS), originally developed through funding by OER. Innotek Corporation is a small business that would be one logical end-user of the DSPBV reactor technology. Innotek is working with several major U.S. engineering firms to evaluate the potential of this technology in the disposal of wastes from sewage treatment plants. PNL entered into a CRADA with Innotek to build a bench-scale demonstration reactor and test the system to advance the economic feasibility of a variety of high pressure chemical processes. Hydrothermal processing of corrosive substances on a large scale can now be made significantly safer and more economical through use of the DSPBV. Hydrothermal chemical reactions such as wet-air oxidation and supercritical water oxidation occur in a highly corrosive environment inside a pressure vessel. Average corrosion rates from 23 to 80 miles per year have been reported by Rice (1994) and Latanision (1993).
Guidelines for Estimating Unmetered Industrial Water Use
Boyd, Brian K.
2010-08-01T23:59:59.000Z
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.
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
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.
Iterative image-domain decomposition for dual-energy CT
Niu, Tianye; Dong, Xue; Petrongolo, Michael; Zhu, Lei, E-mail: leizhu@gatech.edu [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)] [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)
2014-04-15T23:59:59.000Z
Purpose: Dual energy CT (DECT) imaging plays an important role in advanced imaging applications due to its capability of material decomposition. Direct decomposition via matrix inversion suffers from significant degradation of image signal-to-noise ratios, which reduces clinical values of DECT. Existing denoising algorithms achieve suboptimal performance since they suppress image noise either before or after the decomposition and do not fully explore the noise statistical properties of the decomposition process. In this work, the authors propose an iterative image-domain decomposition method for noise suppression in DECT, using the full variance-covariance matrix of the decomposed images. Methods: The proposed algorithm is formulated in the form of least-square estimation with smoothness regularization. Based on the design principles of a best linear unbiased estimator, the authors include the inverse of the estimated variance-covariance matrix of the decomposed images as the penalty weight in the least-square term. The regularization term enforces the image smoothness by calculating the square sum of neighboring pixel value differences. To retain the boundary sharpness of the decomposed images, the authors detect the edges in the CT images before decomposition. These edge pixels have small weights in the calculation of the regularization term. Distinct from the existing denoising algorithms applied on the images before or after decomposition, the method has an iterative process for noise suppression, with decomposition performed in each iteration. The authors implement the proposed algorithm using a standard conjugate gradient algorithm. The method performance is evaluated using an evaluation phantom (Catphan©600) and an anthropomorphic head phantom. The results are compared with those generated using direct matrix inversion with no noise suppression, a denoising method applied on the decomposed images, and an existing algorithm with similar formulation as the proposed method but with an edge-preserving regularization term. Results: On the Catphan phantom, the method maintains the same spatial resolution on the decomposed images as that of the CT images before decomposition (8 pairs/cm) while significantly reducing their noise standard deviation. Compared to that obtained by the direct matrix inversion, the noise standard deviation in the images decomposed by the proposed algorithm is reduced by over 98%. Without considering the noise correlation properties in the formulation, the denoising scheme degrades the spatial resolution to 6 pairs/cm for the same level of noise suppression. Compared to the edge-preserving algorithm, the method achieves better low-contrast detectability. A quantitative study is performed on the contrast-rod slice of Catphan phantom. The proposed method achieves lower electron density measurement error as compared to that by the direct matrix inversion, and significantly reduces the error variation by over 97%. On the head phantom, the method reduces the noise standard deviation of decomposed images by over 97% without blurring the sinus structures. Conclusions: The authors propose an iterative image-domain decomposition method for DECT. The method combines noise suppression and material decomposition into an iterative process and achieves both goals simultaneously. By exploring the full variance-covariance properties of the decomposed images and utilizing the edge predetection, the proposed algorithm shows superior performance on noise suppression with high image spatial resolution and low-contrast detectability.
Dual-etalon cavity ring-down frequency-comb spectroscopy with broad band light source
Chandler, David W; Strecker, Kevin E
2014-04-01T23:59:59.000Z
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.
State energy data report 1994: Consumption estimates
NONE
1996-10-01T23:59:59.000Z
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.