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Note: This page contains sample records for the topic "resampling process variable" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


1

Resampling approach for anomaly detection in multispectral images  

Science Conference Proceedings (OSTI)

We propose a novel approach for identifying the 'most unusual' samples in a data set, based on a resampling of data attributes. The resampling produces a 'background class' and then binary classification is used to distinguish the original training set from the background. Those in the training set that are most like the background (i e, most unlike the rest of the training set) are considered anomalous. Although by their nature, anomalies do not permit a positive definition (if I knew what they were, I wouldn't call them anomalies), one can make 'negative definitions' (I can say what does not qualify as an interesting anomaly). By choosing different resampling schemes, one can identify different kinds of anomalies. For multispectral images, anomalous pixels correspond to locations on the ground with unusual spectral signatures or, depending on how feature sets are constructed, unusual spatial textures.

Theiler, J. P. (James P.); Cai, D. (David)

2003-01-01T23:59:59.000Z

2

On resampling and uncertainty estimation in Linear System Identification  

Science Conference Proceedings (OSTI)

Linear System Identification yields a nominal model parameter, which minimizes a specific criterion based on the single input-output data set. Here we investigate the utility of various methods for estimating the probability distribution of this nominal ... Keywords: Bootstrap, Model validation, Monte Carlo, Resampling, Subsampling, System identification

Simone Garatti; Robert R. Bitmead

2010-05-01T23:59:59.000Z

3

Process for applying control variables having fractal structures  

DOE Patents (OSTI)

A process and apparatus for the application of a control variable having a fractal structure to a body or process. The process of the present invention comprises the steps of generating a control variable having a fractal structure and applying the control variable to a body or process reacting in accordance with the control variable. The process is applicable to electroforming where first, second and successive pulsed-currents are applied to cause the deposition of material onto a substrate, such that the first pulsed-current, the second pulsed-current, and successive pulsed currents form a fractal pulsed-current waveform.

Bullock, IV, Jonathan S. (Oak Ridge, TN); Lawson, Roger L. (Oliver Springs, TN)

1996-01-01T23:59:59.000Z

4

Characterization and analysis of process variability in deeply-scaled MOSFETs  

E-Print Network (OSTI)

Variability characterization and analysis in advanced technologies are needed to ensure robust performance as well as improved process capability. This thesis presents a framework for device variability characterization ...

Balakrishnan, Karthik, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

5

Optimization of forming load and variables in deep drawing process ...  

E-Print Network (OSTI)

Mar 6, 2007 ... Abstract: Sheet metal forming is a significant manufacturing process for producing a large variety of automotive parts and aerospace parts as ...

6

DESIGN OF SOFTWARE SENSORS FOR UNMEASURABLE VARIABLES OF ANAEROBIC DIGESTION PROCESSES  

E-Print Network (OSTI)

DESIGN OF SOFTWARE SENSORS FOR UNMEASURABLE VARIABLES OF ANAEROBIC DIGESTION PROCESSES Simeonov, I variables of anaerobic digestion processes. For this purpose, different mathematical models of anaerobic on a pilot-scale anaerobic bioreactor with computer monitoring system. Key words: Anaerobic digestion

Paris-Sud XI, Université de

7

Selection of Controlled Variables for a Natural Gas to Liquids Process Mehdi Panahi and Sigurd Skogestad*  

E-Print Network (OSTI)

Selection of Controlled Variables for a Natural Gas to Liquids Process Mehdi Panahi and Sigurd variables (CVs) for a natural gas to hydrocarbon liquids (GTL) process based on the idea of self of operation are studied. In mode I, where the natural gas flow rate is given, there are three unconstrained

Skogestad, Sigurd

8

Does Ownership Affect the Variability of the Production Process? Evidence from International Courier Services  

Science Conference Proceedings (OSTI)

A firm often must ensure that products or services it produces match customer expectations. We define variability as any deviation in a production process yielding products or services whose attributes differ from the firm's stated target specifications. ... Keywords: contracting, governance, organizational choice, reliability, variability, variance

Chihmao Hsieh; Sérgio Giovanetti Lazzarini; Jackson A. Nickerson; Marcio Laurini

2010-07-01T23:59:59.000Z

9

Precise asymptotics for the linear processes generated by associated random variables in Hilbert spaces  

Science Conference Proceedings (OSTI)

Let {@e"k,k@?Z} be a strictly stationary associated sequence of random variables taking values in a real separable Hilbert space, and {a"k;k@?Z} be a sequence of bounded linear operators. For a linear process X"k=@?"i"="-"~^~a"i(@e"k"-"i), the precise ... Keywords: Association, Bounded operator, Convergence rates, Hilbert space, Linear processes

Ke-Ang Fu; Jie Li; Ya-Juan Dong; Hui Zhou

2012-09-01T23:59:59.000Z

10

X-ray Variability and Emission Process of the Radio Jet in M87  

E-Print Network (OSTI)

We monitored the M87 jet with the ACIS-S detector on Chandra with 5 observations between 2002 Jan and 2002 Jul. Our goal was to determine the presence and degree of variability in morphology, intensity, and spectral parameters. We find strong variability of the core and HST-1, the knot lying 0.8" from the core. These observations were designed to constrain the X-ray emission process: whereas synchrotron emission would necessitate the presence of extremely high energy electrons with a halflife of a few years or less, inverse Compton emission from a relativistic jet would arise from low energy electrons with very long halflives. Currently, all indications point to a synchrotron process for the X-ray emission from the M87 jet. We give key parameters for a ``modest beaming'' synchrotron model.

D. E. Harris

2003-02-14T23:59:59.000Z

11

Verification of Precipitation Forecasts from Two Limited-Area Models over Italy and Comparison with ECMWF Forecasts Using a Resampling Technique  

Science Conference Proceedings (OSTI)

This paper presents the first systematic limited area model (LAM) precipitation verification work over Italy. A resampling technique was used to provide skill score results along with confidence intervals. Two years of data were used, starting in ...

Christophe Accadia; Stefano Mariani; Marco Casaioli; Alfredo Lavagnini; Antonio Speranza

2005-06-01T23:59:59.000Z

12

Quantifying the source of reentrant line variability and the effects of processes standardization on tool availability variability  

E-Print Network (OSTI)

This thesis quantifies the sensitivity of tool availability variability with respect to product throughput and examines how Intel's High Precision Maintenance initiative can be used to minimize these effects. Tools with ...

Peavey, Milo Camp

2007-01-01T23:59:59.000Z

13

Effect of process variables on the quality attributes of briquettes from wheat, oat, canola and barley  

DOE Green Energy (OSTI)

Effect of process variables on the quality attributes of briquettes from wheat, oat, canola and barley straw Jaya Shankar Tumuluru*, L. G. Tabil, Y. Song, K. L. Iroba and V. Meda Biomass is a renewable energy source and environmentally friendly substitute for fossil fuels such as coal and petroleum products. Major limitation of biomass for successful energy application is its low bulk density, which makes it very difficult and costly to transport and handle. To overcome this limitation, biomass has to be densified. The commonly used technologies for densification of biomass are pelletization and briquetting. Briquetting offers many advantages at it can densify larger particles sizes of biomass at higher moisture contents. Briquetting is influenced by a number of feedstock and process variables such as moisture content, particle size distribution, and some operating variables such as temperature and densification pressure. In the present study, experiments were designed and conducted based on Box-Behnken design to produce briquettes using barley, wheat, canola and barley straws. A laboratory scale hydraulic briquette press was used for the present study. The experimental process variables and their levels used in the present study were pressure levels (7.5, 10, 12.5 MPa), three levels of temperature (90, 110, 130 C), at three moisture content levels (9, 12, 15% w.b.), and three levels of particle size (19.1, 25.04, 31.75 mm). The quality variables studied includes moisture content, initial density and final briquette density after two weeks of storage, size distribution index and durability. The raw biomass was initially chopped and size reduced using a hammer mill. The ground biomass was conditioned at different moisture contents and was further densified using laboratory hydraulic press. For each treatment combination, ten briquettes were manufactured at a residence time of about 30 s after compression pressure setpoint was achieved. After compression, the initial dimensions and the final dimensions after 2 weeks of storage in controlled environment of all the samples were measured. Durability, dimensional stability, and moisture content tests were conducted after two weeks of storage of the briquettes produced. Initial results indicated that moisture content played a significant role on briquettes durability, stability, and density. Low moisture content of the straws (7-12%) gave more durable briquettes. Briquette density increased with increasing pressure depending on the moisture content value. The axial expansion was more significant than the lateral expansion, which in some cases tended to be nil depending on the material and operating variables. Further data analysis is in progress in order to understand the significance of the process variables based on ANOVA. Regression models were developed to predict the changes in quality of briquettes with respect of the process variables under study. Keywords: Herbaceous biomass, densification, briquettes, density, durability, dimensional stability, ANOVA and regression equations

Jaya Shankar Tumuluru

2011-08-01T23:59:59.000Z

14

Signal-dependent variable-resolution clockless A/D conversion with application to continuous-time digital signal processing  

Science Conference Proceedings (OSTI)

A variable-resolution (VR) quantizer with input-activity-dependent adjustable resolution is presented. Several potential schemes are discussed; the favored scheme achieves adjustable resolution by level skipping according to the speed of the input. The ... Keywords: analog-to-digital converter (ADC), continuous-time digital signal processing (CT DSP), level-crossing sampling, quantization

Mariya Kurchuk; Yannis Tsividis

2010-05-01T23:59:59.000Z

15

P-adic Elliptic Quadratic Forms, Parabolic-Type Pseudodifferential Equations With Variable Coefficients, and Markov Processes  

E-Print Network (OSTI)

In this article we study the Cauchy problem for a new class of parabolic-type pseudodifferential equations with variable coefficients for which the fundamental solutions are transition density functions of Markov processes in the four dimensional vector space over the field of p-adic numbers.

O. F. Casas-Sánchez; W. A. Zúńiga-Galindo

2013-11-29T23:59:59.000Z

16

Dynamic cardiovagal response to motion sickness: A point-process heart rate variability study  

E-Print Network (OSTI)

A visual display of stripes was used to examine cardiovagal response to motion sickness. Heart rate variability (HRV) was investigated using dynamic methods to discern instantaneous fluctuations in reaction to stimulus and ...

Brown, Emery N.

17

Modeling the Dynamics of Long-Term Variability of Hydroclimatic Processes  

Science Conference Proceedings (OSTI)

The stochastic analysis, modeling, and simulation of climatic and hydrologic processes such as precipitation, streamflow, and sea surface temperature have usually been based on assumed stationarity or randomness of the process under ...

Oli G. B. Sveinsson; Jose D. Salas; Duane C. Boes; Roger A. Pielke Sr.

2003-06-01T23:59:59.000Z

18

The Effect of Process Variables on the Structure and Properties of ...  

Science Conference Proceedings (OSTI)

can be separated into three essential component processes: ..... facilities made available at Oxford, and to the Science and Engineering. Research Council, the ...

19

Reducing the Variability in cDNA Microarray Image Processing By Bayesian Inference  

E-Print Network (OSTI)

Motivation: Gene expression levels are obtained from microarray experiments through the extraction of pixel intensities from a scanned image of the slide. It is widely acknowledged that variabilities can occur in expression levels extracted from the same images by different users with the same software packages. These inconsistencies arise due to differences in the refinement of the placement of the microarray `grids'. We introduce a novel automated approach to the refinement of grid placements that is based upon the use of Bayesian inference for determining the size, shape and positioning of the microarray `spots', capturing uncertainty that can be passed to downstream analysis.

Neil Lawrence; Marta Milo; Mahean Niranjan; Penny Rashbass; Stephan Soullier

2003-01-01T23:59:59.000Z

20

The monitoring and control of TRUEX processes. Volume 1, The use of sensitivity analysis to determine key process variables and their control bounds  

SciTech Connect

The Generic TRUEX Model (GTM) was used to design a flowsheet for the TRUEX solvent extraction process that would be used to determine its instrumentation and control requirements. Sensitivity analyses of the key process variables, namely, the aqueous and organic flow rates, feed compositions, and the number of contactor stages, were carried out to assess their impact on the operation of the TRUEX process. Results of these analyses provide a basis for the selection of an instrument and control system and the eventual implementation of a control algorithm. Volume Two of this report is an evaluation of the instruments available for measuring many of the physical parameters. Equations that model the dynamic behavior of the TRUEX process have been generated. These equations can be used to describe the transient or dynamic behavior of the process for a given flowsheet in accordance with the TRUEX model. Further work will be done with the dynamic model to determine how and how quickly the system responds to various perturbations. The use of perturbation analysis early in the design stage will lead to a robust flowsheet, namely, one that will meet all process goals and allow for wide control bounds. The process time delay, that is, the speed with which the system reaches a new steady state, is an important parameter in monitoring and controlling a process. In the future, instrument selection and point-of-variable measurement, now done using the steady-state results reported here, will be reviewed and modified as necessary based on this dynamic method of analysis.

Regalbuto, M.C.; Misra, B.; Chamberlain, D.B.; Leonard, R.A.; Vandegrift, G.F.

1992-04-01T23:59:59.000Z

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


21

Sensitivity of Global Tropical Climate to Land Surface Processes: Mean State and Interannual Variability  

Science Conference Proceedings (OSTI)

This study examines the sensitivity of the global climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on ...

Hsi-Yen Ma; Heng Xiao; C. Roberto Mechoso; Yongkang Xue

2013-03-01T23:59:59.000Z

22

Quasigeostrophic Forecasting and Physical Processes of Iceland-Faroe Frontal Variability  

Science Conference Proceedings (OSTI)

Using a hydrocast survey of the Iceland-Faroe Front (IFF) from October 1992, quasigeostrophic forecasts are studied to validate their efficacy and to diagnose the physical processes involved in the rapid growth of a cold tongue intrusion. ...

Arthur J. Miller; Pierre-Marie Poulain; Alex Warn-Varnas; Hernan G. Arango; Allan R. Robinson; Wayne G. Leslie

1995-06-01T23:59:59.000Z

23

On the nature of heart rate variability in a breathing normal subject: A stochastic process analysis  

Science Conference Proceedings (OSTI)

Human heart rate is moderated by the autonomous nervous system acting predominantly through the sinus node (the main cardiac physiological pacemaker). One of the dominant factors that determine the heart rate in physiological conditions is its coupling with the respiratory rhythm. Using the language of stochastic processes

Teodor Buchner; Monika Petelczyc; Jan J. ?ebrowski; Aleksander Prejbisz; Marek Kabat; Andrzej Januszewicz; Anna Justyna Piotrowska; Waldemar Szelenberger

2009-01-01T23:59:59.000Z

24

NERI PROJECT 99-119. TASK 2. DATA-DRIVEN PREDICTION OF PROCESS VARIABLES. FINAL REPORT  

Science Conference Proceedings (OSTI)

This report describes the detailed results for task 2 of DOE-NERI project number 99-119 entitled ''Automatic Development of Highly Reliable Control Architecture for Future Nuclear Power Plants''. This project is a collaboration effort between the Oak Ridge National Laboratory (ORNL,) The University of Tennessee, Knoxville (UTK) and the North Carolina State University (NCSU). UTK is the lead organization for Task 2 under contract number DE-FG03-99SF21906. Under task 2 we completed the development of data-driven models for the characterization of sub-system dynamics for predicting state variables, control functions, and expected control actions. We have also developed the ''Principal Component Analysis (PCA)'' approach for mapping system measurements, and a nonlinear system modeling approach called the ''Group Method of Data Handling (GMDH)'' with rational functions, and includes temporal data information for transient characterization. The majority of the results are presented in detailed reports for Phases 1 through 3 of our research, which are attached to this report.

Upadhyaya, B.R.

2003-04-10T23:59:59.000Z

25

Quantitative discrimination between geological materials with variable density contrast by high resolution X-ray computed tomography: An example using amygdule size-distribution in ancient lava flows  

Science Conference Proceedings (OSTI)

The bubble-size distribution in 2.7 billion year old lava flows can be used as a proof of concept illustrating a new set of techniques for measuring volumes of geological materials with variable density contrasts using high-resolution X-ray computed ... Keywords: Amygdules, Bootstrap resampling, Bubble-size distribution, Central limit theorem, Dynamic thresholding, X-ray tomography

Sanjoy M. Som, James W. Hagadorn, Weston A. Thelen, Alan R. Gillespie, David C. Catling, Roger Buick

2013-04-01T23:59:59.000Z

26

Climatology and Interannual Variability in the Intensity of Synoptic-Scale Processes in the North Atlantic from the NCEP–NCAR Reanalysis Data  

Science Conference Proceedings (OSTI)

North Atlantic synoptic-scale processes are analyzed by bandpassing 6-hourly NCEP–NCAR reanalysis data (1958–98) for several synoptic ranges corresponding to ultrahigh-frequency variability (0.5–2 days), synoptic-scale variability (2–6 days), ...

Sergey K. Gulev; Thomas Jung; Eberhard Ruprecht

2002-04-01T23:59:59.000Z

27

Processing Variables and Parameters  

Science Conference Proceedings (OSTI)

...J.J. McNally, F.L. Williams, and J.R. McNeill, Proc. SPIE, Vol 678, Society of Photo-Optical Instrumentation Engineers,

28

Effect of Process Variables  

Science Conference Proceedings (OSTI)

Pressure Water Leaching Molybdenum and Nickel from Mo-Ni Ore of Black Shale without Reagent · Recovery of Rare Earth Metals from Wasted Magnet.

29

Analyses by the Defense Waste Processing Facility Laboratory of Thorium Glasses from the Sludge Batch 6 Variability Study  

Science Conference Proceedings (OSTI)

The Savannah River Remediation (SRR) Defense Waste Processing Facility (DWPF) is currently processing Sludge Batch 6 (SB6) with Frit 418. At times during the processing of this glass system, thorium is expected to be at concentrations in the final wasteform that make it a reportable element for the first time since startup of radioactive operations at the DWPF. The Savannah River National Laboratory (SRNL) supported the qualification of the processing of this glass system at the DWPF. A recommendation from the SRNL studies was the need for the DWPF Laboratory to establish a method to measure thorium by Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICPAES). This recommendation led to the set of thorium-bearing glasses from the SB6 Variability Study (VS) being submitted to the DWPF Laboratory for chemical composition measurement. The measurements were conducted by the DWPF Laboratory using the sodium peroxide fusion preparation method routinely employed for analysis of samples from the Slurry Mix Evaporator (SME). These measurements are presented and reviewed in this report. The review indicates that the measurements provided by the DWPF Laboratory are comparable to those provided by Analytical Development's laboratory at SRNL for these same glasses. As a result, the authors of this report recommend that the DWPF Laboratory begin using its routine peroxide fusion dissolution method for the measurement of thorium in SME samples of SB6. The purpose of this technical report is to present the measurements generated by the DWPF Laboratory for the SB6 VS glasses and to compare the measurements to the targeted compositions for these VS glasses as well as to SRNL's measurements (both sets, targeted and measured, of compositional values were reported by SRNL in [2]). The goal of these comparisons is to provide information that will lead to the qualification of peroxide fusion dissolution as a method for the measurement by the DWPF Laboratory of thorium in SME glass samples.

Edwards, T.; Click, D.; Feller, M.

2011-02-28T23:59:59.000Z

30

1M. Panahi, S. Skogestad ' Controlled Variables Selection for a Natural Gas to Liquids (GTL) process' Controlled Variables Selection for a  

E-Print Network (OSTI)

to Liquids (GTL) process' Auto-thermal reformer (ATR) reactions 2n Oxidation of methane: Steam reforming unit · Pre-reformer · Auto-thermal reformer (ATR) · Fired heater CO2 removal (optional) Fischer of methane: Shift Reaction: 4 2 2 3 2 2 CH O CO H O 4 2 23CH H O CO H 2 2 2CO H O CO H ( ) 2 n m 2 2 m

Skogestad, Sigurd

31

A Hybrid approach to molecular continuum processes combiningGaussian basis functions and the discrete variable representation  

SciTech Connect

Gaussian basis functions, routinely employed in molecular electronic structure calculations, can be combined with numerical grid-based functions in a discrete variable representation to provide an efficient method for computing molecular continuum wave functions. This approach, combined with exterior complex scaling, obviates the need for slowly convergent single-center expansions, and allows one to study a variety of electron-molecule collision problems. The method is illustrated by computation of various bound and continuum properties of H2+.

Rescigno, Thomas N.; Horner, Daniel A.; Yip, Frank L.; McCurdy,C. William

2005-08-29T23:59:59.000Z

32

Nonlinear Statistical Signal Processing: A Particle Filtering Approach  

SciTech Connect

A introduction to particle filtering is discussed starting with an overview of Bayesian inference from batch to sequential processors. Once the evolving Bayesian paradigm is established, simulation-based methods using sampling theory and Monte Carlo realizations are discussed. Here the usual limitations of nonlinear approximations and non-gaussian processes prevalent in classical nonlinear processing algorithms (e.g. Kalman filters) are no longer a restriction to perform Bayesian inference. It is shown how the underlying hidden or state variables are easily assimilated into this Bayesian construct. Importance sampling methods are then discussed and shown how they can be extended to sequential solutions implemented using Markovian state-space models as a natural evolution. With this in mind, the idea of a particle filter, which is a discrete representation of a probability distribution, is developed and shown how it can be implemented using sequential importance sampling/resampling methods. Finally, an application is briefly discussed comparing the performance of the particle filter designs with classical nonlinear filter implementations.

Candy, J

2007-09-19T23:59:59.000Z

33

Mixture-process variable approach to optimize a microemulsion electrokinetic chromatography method for the quality control of a nutraceutical based on coenzyme Q10  

SciTech Connect

In recent years, multivariate optimization has played an increasing role in analytical method development. ICH guidelines recommend using statistical design of experiments to identify the design space, in which multivariate combinations of composition variables and process variables have been demonstrated to provide quality results. Considering a microemulsion electrokinetic chromatography method (MEEKC), the performance of the electrophoretic run depends on the proportions of mixture components (MCs) of the microemulsion and on the values of process variables (PVs). In the present work, for the first time in the literature, a mixture-process variable (MPV) approach was applied to optimize a MEEKC method for the analysis of coenzyme Q10 (Q10), ascorbic acid (AA), and folic acid (FA) contained in nutraceuticals. The MCs (buffer, surfactant-cosurfactant, oil) and the PVs (voltage, buffer concentration, buffer pH) were simultaneously changed according to a MPV experimental design. A 62-run MPV design was generated using the I-optimality criterion, assuming a 46-term MPV model allowing for special-cubic blending of the MCs, quadratic effects of the PVs, and some MC-PV interactions. The obtained data were used to develop MPV models that express the performance of an electrophoretic run (measured as peak efficiencies of Q10, AA, and FA) in terms of the MCs and PVs. Contour and perturbation plots were drawn for each of the responses. Finally, the MPV models and criteria for the peak efficiencies were used to develop the design space and an optimal subregion (i.e., the settings of the mixture MCs and PVs that satisfy the respective criteria), as well as a unique optimal combination of MCs and PVs.

Piepel, Gregory F.; Pasquini, Benedetta; Cooley, Scott K.; Heredia-Langner, Alejandro; Orlandini, Serena; Furlanetto, Sandra

2012-08-15T23:59:59.000Z

34

A new approach in data visualization to integrate time and space variability of daylighting in the design process  

E-Print Network (OSTI)

Daylighting design has great impact on the performance and aesthetical quality of a work of architecture but requires many issues to be addressed during the design process. The way existing daylighting tools deliver data ...

Yi, Lu, S.M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

35

A hybridGaussian-discrete variable representation approach to molecular continuum processes II: application to photoionization of diatomic Li2+  

SciTech Connect

We describe an approach for studying molecular photoionization with a hybrid basis that combines the functionality of analytic basis sets to represent electronic coordinates near the nuclei of a molecule with numerically-defined grid-based functions. We discuss the evaluation of the various classes of two-electron integrals that occur in a hybrid basis consisting of Gaussian type orbitals (GTOs) and discrete variable representation (DVR) functions. This combined basis is applied to calculate single photoionization cross sections for molecular Li_2+, which has a large equilibrium bond distance (R=5.86a_0). The highly non-spherical nature of Li_2+ molecules causes higher angular momentum components to contribute significantly to the cross section even at low photoelectron energies, resulting in angular distributions that appear to be f-wave dominated near the photoionization threshold. At higher energies, where the de Broglie wavelength of the photoelectron becomes comparable with the bond distance, interference effects appear in the photoionization cross section. These interference phenomena appear at much lower energies than would be expected for diatomic targets with shorter internuclear separations.

Rescigno, Thomas N; Yip, Frank L.; McCurdy, C. William; Rescigno, Thomas N.

2008-08-01T23:59:59.000Z

36

Procession  

E-Print Network (OSTI)

UEE 2008 Ziermann, Martin 2004 Macht und Architektur: ZweiP ROCESSION Martin Stadler EDITORS W ILLEKE W ENDRICHFull Citation: Stadler, Martin, 2008, Procession. In Jacco

Stadler, Martin

2008-01-01T23:59:59.000Z

37

Processing  

Science Conference Proceedings (OSTI)

...are processed to complex final shapes by investment casting. Iron-nickel-base superalloys are not customarily investment cast. Investment casting permits intricate internal cooling

38

Variable Screw Compressor, Variable Screw Compressor Suppliers ...  

U.S. Energy Information Administration (EIA)

Variable Screw Compressor Suppliers & air compressor Manufacturers Directory. Source Top Quality Variable Screw Compressor Suppliers, air ...

39

Performance Variability  

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

Variability Variability of Highly Parallel Architectures William T.C. Kramer 1 and Clint Ryan 2 1 Department of Computing Sciences, University of California at Berkeley and the National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory 2 Department of Computing Sciences, University of California at Berkeley Abstract. The design and evaluation of high performance computers has concentrated on increasing computational speed for applications. This performance is often measured on a well configured dedicated sys- tem to show the best case. In the real environment, resources are not always dedicated to a single task, and systems run tasks that may influ- ence each other, so run times vary, sometimes to an unreasonably large extent. This paper explores the amount of variation seen across four large distributed memory systems in a systematic manner. It then

40

Automated versus manual post-processing of perfusion-CT data in patients with acute cerebral ischemia: influence on interobserver variability  

E-Print Network (OSTI)

the first time employing manual selection of AIF, VOF andNEURORADIOLOGY Automated versus manual post-processing ofand symmetry axis versus manual selection. Methods Imaging

2009-01-01T23:59:59.000Z

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


41

Retrieval of Thermal and Microphysical Variables in Observed Convective Storms. Part II: Sensitivity of Cloud Processes to Variation of the Microphysical Parameterization  

Science Conference Proceedings (OSTI)

The hydrometeor content and thermal fields in a thunderstorm are estimated from a three-dimensional kinematic cloud model employing Doppler wind fields and parameterized microphysical processes. The sensitivity of the cloud model calculations to ...

Conrad L. Ziegler

1988-03-01T23:59:59.000Z

42

Effects of processing variables on the hydrogen content and resultant mechanical properties of uranium and uranium-3/4 wt % titanium alloy  

DOE Green Energy (OSTI)

Uranium and its alloys are capable of being processed, fabricated and heat treated by many different methods. The deleterious effects of hydrogen on the mechanical properties of uranium and its alloys are well established. In this study the effects of certain processing procedures on hydrogen absorption and removal were investigated. Both unalloyed uranium and uranium-3/4 wt % titanium were involved in this work. The tensile test data for both materials clearly show the adverse effects of hydrogen absorption.

Muller, J.F.

1980-01-01T23:59:59.000Z

43

Evaluation of a Process-Based Agro-Ecosystem Model (Agro-IBIS) across the U.S. Corn Belt: Simulations of the Interannual Variability in Maize Yield  

Science Conference Proceedings (OSTI)

A process-based terrestrial ecosystem model, Agro-IBIS, was used to simulate maize yield in a 13-state region of the U.S. Corn Belt from 1958 to 1994 across a 0.5° terrestrial grid. For validation, county-level census [U.S. Department of ...

Christopher J. Kucharik

2003-12-01T23:59:59.000Z

44

Comparing cost prediction models by resampling techniques  

Science Conference Proceedings (OSTI)

The accurate software cost prediction is a research topic that has attracted much of the interest of the software engineering community during the latest decades. A large part of the research efforts involves the development of statistical models based ... Keywords: Accuracy measure, Bootstrap, Confidence interval, Permutation test, Software cost estimation

Nikolaos Mittas; Lefteris Angelis

2008-05-01T23:59:59.000Z

45

Resampling Hypothesis Tests for Autocorrelated Fields  

Science Conference Proceedings (OSTI)

Presently employed hypothesis tests for multivariate geophysical data (e.g., climatic fields) require the assumption that either the data are serially uncorrelated, or spatially uncorrelated, or both. Good methods have been developed to deal with ...

D. S. Wilks

1997-01-01T23:59:59.000Z

46

Studies on selection of controlled variables  

E-Print Network (OSTI)

Studies on selection of controlled variables by Vidar Alstad A Thesis Submitted for the Degree. Thus, the selection of controlled variables integrates the optimization and the control layer. Selecting the right controlled variables can be of paramount importance. Many chem­ ical processes

Skogestad, Sigurd

47

Studies on selection of controlled variables  

E-Print Network (OSTI)

Studies on selection of controlled variables by Vidar Alstad A Thesis Submitted for the Degree. Thus, the selection of controlled variables integrates the optimization and the control layer. Selecting the right controlled variables can be of paramount importance. Many chem- ical processes

Skogestad, Sigurd

48

Jets with Variable R  

E-Print Network (OSTI)

We introduce a new class of jet algorithms designed to return conical jets with a variable Delta R radius. A specific example, in which Delta R scales as 1/pT, proves particularly useful in capturing the kinematic features of a wide variety of hard scattering processes. We implement this Delta R scaling in a sequential recombination algorithm and test it by reconstructing resonance masses and kinematic endpoints. These test cases show 10-20% improvements in signal efficiency compared to fixed Delta R algorithms. We also comment on cuts useful in reducing continuum jet backgrounds.

David Krohn; Jesse Thaler; Lian-Tao Wang

2009-03-02T23:59:59.000Z

49

Variable area fuel cell process channels  

DOE Patents (OSTI)

A fuel cell arrangement having a non-uniform distribution of fuel and oxidant flow paths, on opposite sides of an electrolyte matrix, sized and positioned to provide approximately uniform fuel and oxidant utilization rates, and cell conditions, across the entire cell.

Kothmann, Richard E. (Churchill Borough, PA)

1981-01-01T23:59:59.000Z

50

Analysis of Process Variable Effects on the Roller Imprinting Process  

E-Print Network (OSTI)

the roll are described using b-spline curves, and the rollwas calculated based on the b-spline control points of the

Vijayaraghavan, Athulan; Hayse-Gregson, Stuart; Valdez, Rodolfo; Dornfeld, David

2008-01-01T23:59:59.000Z

51

Stored program digital process controller  

DOE Patents (OSTI)

A digital process control function generator wherein a timing clock, in conjunction with programmable read only memories controls variables in a process with respect to time.

Stephenson, Dwight L. (Los Alamos, NM)

1977-01-04T23:59:59.000Z

52

VARIABLE TIME DELAY MEANS  

DOE Patents (OSTI)

An electrically variable time delay line is described which may be readily controlled simuitaneously with variable impedance matching means coupied thereto such that reflections are prevented. Broadly, the delay line includes a signal winding about a magnetic core whose permeability is electrically variable. Inasmuch as the inductance of the line varies directly with the permeability, the time delay and characteristic impedance of the line both vary as the square root of the permeability. Consequently, impedance matching means may be varied similariy and simultaneously w:th the electrically variable permeability to match the line impedance over the entire range of time delay whereby reflections are prevented.

Clemensen, R.E.

1959-11-01T23:59:59.000Z

53

Bond Graph Modeling Of Variable Structure Systems  

E-Print Network (OSTI)

The problem of describing variable structure models in a compact, object--oriented fashion is revisited and analyzed from the perspective of bond graph modeling. Traditionally, bond graphs have always been used to describe continuous-- time physical processes with a fixed structure. Yet, this paper shall demonstrate that bond graphs are equally suitable to describe variable structure models as fixed structure models. Moreover, a bond graph description of variable structure models can teach us a lot about the essential properties of variable structure models, properties that are not easily visible when other modeling approaches are taken. The paper discusses issues related to causality reassignment and conditional index changes as a consequence of switching in a physical system. Keywords: Bond graphs, variable structure system, computational causality, conditional index change, switching, object--oriented modeling, Dymola. INTRODUCTION When the causality strokes were added to the forme...

François E. Cellier; Martin Otter; Hilding Elmqvist

1995-01-01T23:59:59.000Z

54

Energy Savings of Variable Speed Motors  

E-Print Network (OSTI)

This paper investigates the energy savings available by utilizing variable speed motors on pump and fan applications. Conventional control of flow or pressure in process plants is normally accomplished by throttling the various streams with control valves. Depending on the system and the actual operating conditions, this throttling may consume a considerable amount of energy. The hydraulics of different systems are investigated to generalize high energy saving applications. Typical pump characteristics at varying speeds are investigated since most performance curves are only available at a constant speed. The various types of variable speed electric motors are discussed. However, the primary variable speed system recommended is a variable frequency speed system which utilizes standard induction motors. Specific cases of centrifugal pump applications and cooling tower fan service are presented. Turndown frequencies, stream factors, and electric rates are included in the evaluation. The energy savings of a variable speed system becomes significant when flow rates vary widely and the electrical rates are high.

Fishel, F. D.

1979-01-01T23:59:59.000Z

55

Understanding Biomass Feedstock Variability  

SciTech Connect

If the singular goal of biomass logistics and the design of biomass feedstock supply systems is to reduce the per ton supply cost of biomass, these systems may very well develop with ultimate unintended consequences of highly variable and reduced quality biomass feedstocks. This paper demonstrates that due to inherent species variabilities, production conditions, and differing harvest, collection, and storage practices, this is a very real scenario that biomass producers and suppliers as well as conversion developers should be aware of. Biomass feedstock attributes of ash, carbohydrates, moisture, and particle morphology will be discussed. We will also discuss specifications for these attributes, inherent variability of these attributes in biomass feedstocks, and approaches and solutions for reducing variability for improving feedstock quality.

Kevin L. Kenney; William A. Smith; Garold L. Gresham; Tyler L. Westover

2013-01-01T23:59:59.000Z

56

Estimated Global Hydrographic Variability  

Science Conference Proceedings (OSTI)

An estimate is made of the three-dimensional global oceanic temperature and salinity variability, omitting the seasonal cycle, both as a major descriptive element of the ocean circulation and for use in the error estimates of state estimation. ...

Gaël Forget; Carl Wunsch

2007-08-01T23:59:59.000Z

57

Georeactor Variability and Integrity  

E-Print Network (OSTI)

As a deep-Earth energy source, the planetocentric nuclear-fission georeactor concept is on a more secure scientific footing than the previous idea related to the assumed growth of the inner core. Unlike previously considered deep-Earth energy sources, which are essentially constant on a human time-scale, variability in nuclear fission reactors can arise from changes in composition and/or position of fuel, moderators, and neutron absorbers. Tantalizing circumstantial evidence invites inquiry into the possibility of short-term planetocentric nuclear fission reactor variability. This brief communication emphasizes the importance of scientific integrity and highlights the possibility of variable georeactor power output so that these might be borne in mind in future investigations, especially those related to the Earth's heat flux.

J. Marvin Herndon

2005-10-04T23:59:59.000Z

58

Georeactor Variability and Integrity  

E-Print Network (OSTI)

As a deep-Earth energy source, the planetocentric nuclear-fission georeactor concept is on a more secure scientific footing than the previous idea related to the assumed growth of the inner core. Unlike previously considered deep-Earth energy sources, which are essentially constant on a human time-scale, variability in nuclear fission reactors can arise from changes in composition and/or position of fuel, moderators, and neutron absorbers. Tantalizing circumstantial evidence invites inquiry into the possibility of short-term planetocentric nuclear fission reactor variability. This brief communication emphasizes the importance of scientific integrity and highlights the possibility of variable georeactor power output so that these might be borne in mind in future investigations, especially those related to the Earth's heat flux.

Herndon, J M

2005-01-01T23:59:59.000Z

59

Modeling 18° Water Variability  

Science Conference Proceedings (OSTI)

Variability of 18° Water formation is investigated with an isopycnic-coordinate model of the North Atlantic. A 30-year spinup integration is used as a “control” experiment in which the upper water column in the Sargasso Sea is shown to be in ...

Robert Marsh; Adrian L. New

1996-06-01T23:59:59.000Z

60

Reuse and variability in large software applications  

Science Conference Proceedings (OSTI)

Reuse has always been a major goal in software engineering, since it promises large gains in productivity, quality and time to market reduction. Practical experience has shown that substantial reuse has only successfully happened in two cases: libraries, ... Keywords: AOP, COTS, EAI, MDA, interoperability, model driven software engineering, process driven application, product families, product line, reuse, variability, workflow

Jacky Estublier; German Vega

2005-09-01T23:59:59.000Z

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


61

Variable laser attenuator  

DOE Patents (OSTI)

The disclosure relates to low loss, high power variable attenuators comprising one or more transmissive and/or reflective multilayer dielectric filters. The attenuator is particularly suitable to use with unpolarized lasers such as excimer lasers. Beam attenuation is a function of beam polarization and the angle of incidence between the beam and the filter and is controlled by adjusting the angle of incidence the beam makes to the filter or filters. Filters are selected in accordance with beam wavelength. 9 figs.

Foltyn, S.R.

1987-05-29T23:59:59.000Z

62

Solar-type Variables  

E-Print Network (OSTI)

The rich acoustic oscillation spectrum in solar-type variables make these stars particularly interesting for studying fluid-dynamical aspects of the stellar interior. I present a summary of the properties of solar-like oscillations, how they are excited and damped and discuss some of the recent progress in using asteroseismic diagnostic techniques for analysing low-degree acoustic modes. Also the effects of stellar-cycle variations in low-mass main-sequence stars are addressed.

Houdek, Gunter

2009-01-01T23:59:59.000Z

63

Variable laser attenuator  

SciTech Connect

The disclosure relates to low loss, high power variable attenuators comprng one or more transmissive and/or reflective multilayer dielectric filters. The attenuator is particularly suitable to use with unpolarized lasers such as excimer lasers. Beam attenuation is a function of beam polarization and the angle of incidence between the beam and the filter and is controlled by adjusting the angle of incidence the beam makes to the filter or filters. Filters are selected in accordance with beam wavelength.

Foltyn, Stephen R. (Los Alamos, NM)

1988-01-01T23:59:59.000Z

64

Errors in all variables  

SciTech Connect

We present a thorough derivation of the posterior for the straight line fit employing the hyper-plane prior. For the example of the parabola we enlarge the scope to nonlinear problems, however simplify it to be solved resembling the straight line solution. Finally we come to the problem of determining the exponents of a scaling law, where in logarithmic form the scaling exponents are linear coefficients of logarithmic variables.

Preuss, R.; Dose, V. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, D-85748 Garching (Germany)

2005-11-23T23:59:59.000Z

65

Variable percentage sampler  

DOE Patents (OSTI)

A remotely operable sampler is provided for obtaining variable percentage samples of nuclear fuel particles and the like for analyses. The sampler has a rotating cup for a sample collection chamber designed so that the effective size of the sample inlet opening to the cup varies with rotational speed. Samples of a desired size are withdrawn from a flowing stream of particles without a deterrent to the flow of remaining particles.

Miller, Jr., William H. (Knoxville, TN)

1976-01-01T23:59:59.000Z

66

Variable frequency microwave furnace system  

DOE Patents (OSTI)

A variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency microwave furnace system includes a microwave signal generator or microwave voltage-controlled oscillator for generating a low-power microwave signal for input to the microwave furnace. A first amplifier may be provided to amplify the magnitude of the signal output from the microwave signal generator or the microwave voltage-controlled oscillator. A second amplifier is provided for processing the signal output by the first amplifier. The second amplifier outputs the microwave signal input to the furnace cavity. In the preferred embodiment, the second amplifier is a traveling-wave tube (TWT). A power supply is provided for operation of the second amplifier. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 5 figs.

Bible, D.W.; Lauf, R.J.

1994-06-14T23:59:59.000Z

67

Rapid Oscillations in Cataclysmic Variables  

E-Print Network (OSTI)

I give an overview of the rich phenomenology of dwarf nova oscillations (DNOs) and Quasi-periodic Oscillations (QPOs) observed in cataclysmic variable stars (CVs). The favoured interpretation of these rapid brightness modulations (3 - >1000 s time scales) is that they are magnetic in nature - magnetically channelled accretion from the inner accretion disc for DNOs and possible magnetically excited travelling waves in the disc for QPOs. There is increasing evidence for the magnetic aspects, which extend to lower field the well known properties of strong field (polars) and intermediate strength field (intermediate polars) CVs. The result is that almost all CVs show the presence of magnetic fields on their white dwarf primaries - though for many the intrinsic field may be locally enhanced by the accretion process itself. There are many parallel behaviours with the QPOs seen in X-Ray binaries, with high and low frequency X-Ray QPOs resembling respectively the DNOs and QPOs in CVs.

Brian Warner

2003-12-06T23:59:59.000Z

68

Solar Irradiance Variability  

E-Print Network (OSTI)

The Sun has long been considered a constant star, to the extent that its total irradiance was termed the solar constant. It required radiometers in space to detect the small variations in solar irradiance on timescales of the solar rotation and the solar cycle. A part of the difficulty is that there are no other constant natural daytime sources to which the Sun's brightness can be compared. The discovery of solar irradiance variability rekindled a long-running discussion on how strongly the Sun affects our climate. A non-negligible influence is suggested by correlation studies between solar variability and climate indicators. The mechanism for solar irradiance variations that fits the observations best is that magnetic features at the solar surface, i.e. sunspots, faculae and the magnetic network, are responsible for almost all variations (although on short timescales convection and p-mode oscillations also contribute). In spite of significant progress important questions are still open. Thus there is a debat...

Solanki, Sami K

2012-01-01T23:59:59.000Z

69

Climate Variability, Fish, and Fisheries  

Science Conference Proceedings (OSTI)

Fish population variability and fisheries activities are closely linked to weather and climate dynamics. While weather at sea directly affects fishing, environmental variability determines the distribution, migration, and abundance of fish. ...

P. Lehodey; J. Alheit; M. Barange; T. Baumgartner; G. Beaugrand; K. Drinkwater; J.-M. Fromentin; S. R. Hare; G. Ottersen; R. I. Perry; C. Roy; C. D. van der Lingen; F. Werner

2006-10-01T23:59:59.000Z

70

Colorado River Basin Hydroclimatic Variability  

Science Conference Proceedings (OSTI)

An analysis of annual hydroclimatic variability in the Upper Colorado River basin (UCRB) for the period of 1906–2006 was performed to understand the dominant modes of multidecadal variability. First, wavelet-based spectral analysis was employed ...

Kenneth Nowak; Martin Hoerling; Balaji Rajagopalan; Edith Zagona

2012-06-01T23:59:59.000Z

71

Scalable analysis of variable software  

Science Conference Proceedings (OSTI)

The advent of variability management and generator technology enables users to derive individual variants from a variable code base based on a selection of desired configuration options. This approach gives rise to the generation of possibly billions ... Keywords: C Preprocessor, Liveness Analysis, Software Product Lines, Type Checking, Variability-aware Analysis

Jörg Liebig; Alexander von Rhein; Christian Kästner; Sven Apel; Jens Dörre; Christian Lengauer

2013-08-01T23:59:59.000Z

72

Symmetrization Of Binary Random Variables  

E-Print Network (OSTI)

A random variable Y is called an independent symmetrizer of a given random variable X if (a) it is independent of X and (b) the distribution of X Y is symmetric about 0. In cases where the distribution of X is symmetric about its mean, it is easy to see that the constant random variable Y is a minimum-variance independent symmetrizer. Taking

Abram Kagan; Colin Mallows; Larry Shepp; Robert J. Vanderbei; Yehuda Vardi

1999-01-01T23:59:59.000Z

73

Variability within Modeling Language Definitions  

Science Conference Proceedings (OSTI)

We present a taxonomy of the variability mechanisms offered by modeling languages. The definition of a formal language encompasses a syntax and a semantic domain as well as the mapping that relates them, thus language variabilities are classified according ... Keywords: Modeling languages, UML, formal semantics, variability

María Victoria Cengarle; Hans Grönniger; Bernhard Rumpe

2009-10-01T23:59:59.000Z

74

An open source tool for heart rate variability spectral analysis  

Science Conference Proceedings (OSTI)

In this paper we describe a software package for developing heart rate variability analysis. This package, called RHRV, is a third party extension for the open source statistical environment R, and can be freely downloaded from the R-CRAN repository. ... Keywords: Apnea, Heart rate variability, Open source, Signal processing

L. Rodríguez-Lińares; A. J. Méndez; M. J. Lado; D. N. Olivieri; X. A. Vila; I. Gómez-Conde

2011-07-01T23:59:59.000Z

75

The Evolution of Inhomogeneous Wave Statistics through a Variable Medium  

Science Conference Proceedings (OSTI)

The interaction of ocean waves with variable currents and topography in coastal areas can result in inhomogeneous statistics because of coherent interferences, which affect wave-driven circulation and transport processes. Stochastic wave models, ...

P. B. Smit; T. T. Janssen

2013-08-01T23:59:59.000Z

76

Multi-variable optimization of pressurized oxy-coal combustion  

E-Print Network (OSTI)

Simultaneous multi-variable gradient-based optimization with multi-start is performed on a 300 MWe wet-recycling pressurized oxy-coal combustion process with carbon capture and sequestration. The model accounts for realistic ...

Zebian, Hussam

2011-01-01T23:59:59.000Z

77

Effects of variable wind stress on ocean heat content  

E-Print Network (OSTI)

Ocean heat content change (ocean heat uptake) has an important role in variability of the Earth's heat balance. The understanding of which methods and physical processes control ocean heat uptake needs improvement in order ...

Klima, Kelly

2008-01-01T23:59:59.000Z

78

Process / CI Process  

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

2 Process/Continual Improvement Rev. 11_0406 Page 1 of 6 2 Process/Continual Improvement Rev. 11_0406 Page 1 of 6 EOTA - Business Process Document Title: Process/Continual Improvement Document Number: P-012 Rev 11_0406 Document Owner: Elizabeth Sousa Backup Owner: David Rocha Approver(s): Melissa Otero Parent Document: Q-001 Quality Manual Notify of Changes: EOTA Staff Referenced Document(s): F-016 Process/Continual Improvement Form, P-001 Document Control Process, P-008 Corrective Action and Preventive Action, P-004 Business System Management Review P-012 Process/Continual Improvement Rev. 11_0406 Page 2 of 6 Revision History:

79

Einstein x-ray observations of cataclysmic variables  

SciTech Connect

Observations with the imaging x-ray detectors on the Einstein Observatory have led to a large increase in the number of low luminosity x-ray sources known to be associated with cataclysmic variable stars (CVs). The high sensitivity of the Einstein instrumentation has permitted study of their short timescale variability and spectra. The data are adding significantly to our knowledge of the accretion process in cataclysmic variables and forcing some revision in our ideas concerning the origin of the optical variability in these stars.

Mason, K.O.; Cordova, F.A.

1982-01-01T23:59:59.000Z

80

VARIABLE TIME-INTERVAL GENERATOR  

DOE Patents (OSTI)

This patent relates to a pulse generator and more particularly to a time interval generator wherein the time interval between pulses is precisely determined. The variable time generator comprises two oscillators with one having a variable frequency output and the other a fixed frequency output. A frequency divider is connected to the variable oscillator for dividing its frequency by a selected factor and a counter is used for counting the periods of the fixed oscillator occurring during a cycle of the divided frequency of the variable oscillator. This defines the period of the variable oscillator in terms of that of the fixed oscillator. A circuit is provided for selecting as a time interval a predetermined number of periods of the variable oscillator. The output of the generator consists of a first pulse produced by a trigger circuit at the start of the time interval and a second pulse marking the end of the time interval produced by the same trigger circuit.

Gross, J.E.

1959-10-31T23:59:59.000Z

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


81

CDIAC Climate Data: Available Variables  

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

Climate Variables Available in CDIAC Data Products Temperature Precipitation Cloudiness Sunshine Duration Snowfall and Snow Depth Atmospheric Pressure Atmospheric Moisture Surface...

82

Variables Influencing HRSG Designs  

E-Print Network (OSTI)

Heat Recovery Steam Generators (HRSG's) are widely used in chemical plants, refineries, incineration and cogeneration systems and in general for recovering energy from waste gas streams. In applications such as hydrogen or sulfuric acid plants, the duty and exit gas temperature from the HRSG are set by process considerations while the energy recovery potential in other applications is impacted by considerations of efficiency. In addition, low or high temperature corrosion, space availability, duty, size and maintenance aspects play a vital role in the design and sizing of HRSG's. This paper will address a few of the above considerations.

Ganapathy, V.; Rentz, J.

1990-06-01T23:59:59.000Z

83

Characterization of process variability and robust optimization of analog circuits  

E-Print Network (OSTI)

Continuous scaling of CMOS technology has enabled dramatic performance enhancement of CMOS devices and has provided speed, power, and density improvement in both digital and analog circuits. CMOS millimeter-wave applications ...

Lim, Daihyun, 1976-

2008-01-01T23:59:59.000Z

84

Process restructuring in the presence of message-dependent variables  

Science Conference Proceedings (OSTI)

When services interact, issues can be caused by service implementations being stateful because a stateful implementation requires a certain message exchange protocol to be followed. At present, a model of such a message exchange protocol is seldom complete ...

Thomas S. Heinze; Wolfram Amme; Simon Moser

2010-12-01T23:59:59.000Z

85

The Effect of Processing Variables on High Strength Coiled Tubing ...  

Science Conference Proceedings (OSTI)

Author(s), Martin E Valdez, Gonzalo Gomez, Mariano Coloschi, Bruce Reichert, Jorge Mitre. On-Site Speaker (Planned), Martin E Valdez. Abstract Scope, Coiled

86

Optimization of forming load and variables in deep drawing process ...  

E-Print Network (OSTI)

forming limit curve. The forming limit represents the ..... In Search, Optimization and Machine. Learning” Pearson Education Pvt.Ltd.India, pp 290-292, 2003.

87

Effect of Processing Variables on Powder-Metallurgy Rene 95  

Science Conference Proceedings (OSTI)

using a standard. Rene' 95 heat treatment of 2OOOF/l hr./oil quench plus a. 1400 ~/16 ... schedules shown below: Pass. Metal Temp. % Reduction at Bore/Pass. Total. Reduction .... ever,, were well above the 50 hour minimum requirement.

88

Discrete variable theory of triatomic photodissociation  

SciTech Connect

The coupled equations describing the photodissociation process are expressed in the discrete variable representation (DVR) in which the coupled equations are labeled by quadrature points rather than by internal basis functions. A large reduction in the dimensionality of the coupled equations can be realized since the spatially localized bound state nuclear wave function vanishes at most of the quadrature points, making only certain orientations of the fragments important in the region of strong interaction (small separation). The discrete variable theory of photodissociation is applied to the model dissociation of bent HCN in which the CN fragment is treated as a rigid rotor. The truncated DVR rotational distributions are compared with the exact close coupled rotational distributions, and excellent agreement with greatly reduced dimensionality of the equations is found.

Heather, R.W.; Light, J.C.

1983-07-01T23:59:59.000Z

89

THE WEST AFRICAN MONSOON: DYNAMICS, DECADAL VARIABILITY AND INTERACTION WITH THE EASTERN TROPICAL ATLANTIC SSTS .  

E-Print Network (OSTI)

??This dissertation documents regional modeling studies of various aspects of West African Monsoon dynamics and variability. The physical processes responsible for observed characteristics seasonal evolution… (more)

hagos, samson

2007-01-01T23:59:59.000Z

90

Processing parameters affecting sorghum noodle qualities.  

E-Print Network (OSTI)

??Processing variables of 100% sorghum noodles were investigated to determine effects on noodle quality. A dough was created by microwave heating a flour with 1… (more)

Kunetz, Christine Frances

2012-01-01T23:59:59.000Z

91

On Sub-ENSO Variability  

Science Conference Proceedings (OSTI)

Multichannel singular spectrum analysis (MSSA) of surface zonal wind, sea surface temperature (SST), 20° isotherm depth, and surface zonal current observations (between 1990 and 2004) identifies three coupled ocean–atmosphere modes of variability ...

Noel S. Keenlyside; Mojib Latif; Anke Dürkop

2007-07-01T23:59:59.000Z

92

Process / CI Process  

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

7 Post Travel Summary 11_0221 Page 1 of 3 7 Post Travel Summary 11_0221 Page 1 of 3 EOTA - Business Process Document Title: Post Travel Summary Document Number: ADMF-017 Post Travel Summary 11_0221 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ADMP-004, Contractor Travel Process Notify of Changes: EOTA Staff Referenced Document(s): ADMF-007 EOTA Pre-Travel Authorization Form ADMF-017 Post Travel Summary 11_0221 Page 2 of 3 Revision History: Rev. Description of Change 11_0221 Initial Release ADMF-017 Post Travel Summary 11_0221 Page 3 of 3

93

Variable focal length deformable mirror  

DOE Patents (OSTI)

A variable focal length deformable mirror has an inner ring and an outer ring that simply support and push axially on opposite sides of a mirror plate. The resulting variable clamping force deforms the mirror plate to provide a parabolic mirror shape. The rings are parallel planar sections of a single paraboloid and can provide an on-axis focus, if the rings are circular, or an off-axis focus, if the rings are elliptical. The focal length of the deformable mirror can be varied by changing the variable clamping force. The deformable mirror can generally be used in any application requiring the focusing or defocusing of light, including with both coherent and incoherent light sources.

Headley, Daniel (Albuquerque, NM); Ramsey, Marc (Albuquerque, NM); Schwarz, Jens (Albuquerque, NM)

2007-06-12T23:59:59.000Z

94

Interannual Variability of the Global Radiation Budget  

Science Conference Proceedings (OSTI)

Interannual variability of the global radiation budget, regions that contribute to its variability, and what limits albedo variability are investigated using Clouds and the Earth’s Radiant Energy System (CERES) data taken from March 2000 through ...

Seiji Kato

2009-09-01T23:59:59.000Z

95

Variability of hot mix asphalt produced with reclaimed asphalt pavement  

E-Print Network (OSTI)

Pavement recycling operations have been used in the United States from the early 1900s to date. These recycling operations have been used for a variety of reasons including solid waste disposal problems, reduction of initial cost, and conservation of natural resources (aggregate, binder and energy). Adequate techniques to assess the variability of Reclaimed Asphalt Pavement (RAP) are lacking. The objectives of this research are to determine the variabilities of RAP and Hot Mix Asphalt (HMA), determine the influence of the RAP variability on the HMA variability, and compare the variability of virgin aggregates at the quarries and the aggregates that have been handled and transported to asphalt plant stockpiles. This thesis describes the compositional data analysis including the ternary diagrams for mixes and aggregates, a multivariate beta model, variability analysis using a multivariate variance assumption, and ternary quality control charts. It also describes the hypothesis tests using a k-variate student t distribution and an F-test. The following conclusions are obtained: i) RAP is better used in producing a mix with a relatively small top size 3/8" (Type S-III mix) or 1/2'' (Type S-I mix), and not with a sieve size larger than 1" (Type S-II mix); ii) RAP percent does not significantly influence the mix variability; it is desirable to use a large percentage of RAP in the Type S-I mix, i.e., more than 40% RAP; iii) On the average, the aggregate variability increases after transportation and stockpiling process; iv) On the average, the aggregate in the quarry has less variability than the same aggregate in the asphalt plant stockpile, therefore, aggregates in quarries are better controlled than aggregates in stockpiles; v) Variabilities of aggregates in quarries are slightly larger than the variability of RAP which is slightly larger than variabilities of Type S-II and S-III mixes. Type S-II and S-III mixes have the same variability and are slightly larger than the variability of the Type S-I mix; vi) The ternary diagram and the hypothesis test can be used to judge whether a contractor did a good job; vii) Ternary quality control chart shows the dynamic trend of a mix or an aggregate during the production period.

Yang, Guiqin

1999-01-01T23:59:59.000Z

96

Operating Reserves and Variable Generation  

DOE Green Energy (OSTI)

This report tries to first generalize the requirements of the power system as it relates to the needs of operating reserves. It also includes a survey of operating reserves and how they are managed internationally in system operations today and then how new studies and research are proposing they may be managed in the future with higher penetrations of variable generation.

Ela, E.; Milligan, M.; Kirby, B.

2011-08-01T23:59:59.000Z

97

New Variable Stars in the Globular Cluster NGC 6584  

E-Print Network (OSTI)

Using the Southeastern Association for Research in Astronomy 0.6 meter telescope located at Cerro Tololo, we searched for variable stars in the southern globular cluster NGC 6584. We obtained images during 8 nights between 28 May and 6 July of 2011. After processing the images, we used the image subtraction package ISIS developed by Alard (2000)to search for the variable stars. We identified a total of 69 variable stars in our 10x10 arcmin^2 field, including 43 variables cataloged by Millis & Liller (1980) and 26 hereto unknown variables. In total, we classified 46 of the variables as type RRab, with a mean period of 0.56776 days, 15 as type RRc with a mean period of 0.30886 days, perhaps one lower amplitude type RRe, with a period of 0.26482 days, 4 eclipsing binaries, and 3 long period (P > 2 days) variable stars. As many as 15 of the RRab Lyrae stars exhibited the Blazhko Effect. Furthermore, the mean periods of the RR Lyrae types, the exhibited period/amplitude relationship, and the ratio of N_c/(N_ab...

Toddy, Joseph M; Darragh, Andrew N; Murphy, Brian W

2012-01-01T23:59:59.000Z

98

Process Deviation  

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

8 WBT Course Development Process 110512 Page 1 of 7 EOTA - Business Process Document Title: WBT Course Development Process Document Number: ISDP- 018 Rev. 110512 Document Owner:...

99

Process Deviation  

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

6 WBT Programming Process 110426 Page 1 of 5 EOTA - Business Process Document Title: WBT Programming Process Document Number: ITTP-016 Rev. 110426 Document Owner: Doug Bond...

100

Process Deviation  

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

6 ILT Course Development Process 110512 Page 1 of 7 EOTA - Business Process Document Title: ILT Course Development Process Document Number: ISDP-016 Rev. 110512 Document Owner:...

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


101

Process Deviation  

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

4 NetworkTechnical Support Process 110406 Page 1 of 5 EOTA - Business Process Document Title: NetworkTechnical Support Process Document Number: ITTP-014 Rev. 110406 Document...

102

Process Deviation  

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

2 Training Production Process Overview 110620 1 of 6 EOTA - Business Process Document Title: Training Production Process Document Number: ISDP-002 Rev. 110620 Document Owner:...

103

SLUDGE BATCH VARIABILITY STUDY WITH FRIT 418  

SciTech Connect

The Defense Waste Processing Facility (DWPF) initiated processing Sludge Batch 6 (SB6) in the summer of 2010. In support of processing, the Savannah River National Laboratory (SRNL) provided a recommendation to utilize Frit 418 to process SB6. This recommendation was based on assessments of the compositional projections for SB6 available at the time from the Liquid Waste Organization (LWO) and SRNL (using a model-based approach). To support qualification of SB6, SRNL executed a variability study to assess the applicability of the current durability models for SB6. The durability models were assessed over the expected Frit 418-SB6 composition range. Seventeen glasses were selected for the variability study based on the sludge projections used in the frit recommendation. Five of the glasses are based on the centroid of the compositional region, spanning a waste loading (WL) range of 32 to 40%. The remaining twelve glasses are extreme vertices (EVs) of the sludge region of interest for SB6 combined with Frit 418 and are all at 36% WL. These glasses were fabricated and characterized using chemical composition analysis, X-ray diffraction (XRD) and the Product Consistency Test (PCT). After initiating the SB6 variability study, the measured composition of the SB6 Tank 51 qualification glass produced at the SRNL Shielded Cells Facility indicated that thorium was present in the glass at an appreciable concentration (1.03 wt%), which made it a reportable element for SB6. This concentration of ThO{sub 2} resulted in a second phase of experimental studies. Five glasses were formulated that were based on the centroid of the new sludge compositional region combined with Frit 418, spanning a WL range of 32 to 40%. These glasses were fabricated and characterized using chemical composition analysis and the PCT. Based on the measured PCT response, all of the glasses (with and without thorium) were acceptable with respect to the Environmental Assessment (EA) reference glass regardless of thermal history. All of the normalized boron releases were less than 1 g/L. While all of the targeted glass compositions were predictable with respect to the Product Composition Control System (PCCS) models for durability, a small number of the measured glass compositions were located outside of the lower prediction limit indicating poorer durability than what was actually measured. These unpredictable glasses were in the same lithium metaborate (LM) preparation block during the chemical analyses, which resulted in measured compositions that were not representative of the target compositions. A review of the data did not indicate a clear cause for the problem. Re-digestion and re-measurement of three glasses from this preparation block yielded glass compositions closer to the target values and predicted PCT responses within the PCCS model uncertainty. Therefore, it is believed that the glasses were correctly fabricated and the targeted compositions are closer representations of the true compositions. Per the requirements of the DWPF Glass Product Control Program, the PCCS durability models have been shown to be applicable for the SB6/Frit 418 glass system. PCT results from the glasses fabricated as part of the variability study were shown to be predictable and/or acceptable with respect to the DWPF PCCS models. In addition, the inclusion of ThO{sub 2} was shown to have minimal impact on the acceptability and predictability of the variability study glasses.

Johnson, F.; Edwards, T.

2010-11-29T23:59:59.000Z

104

Climatic variability within an equilibrium greenhouse simulation  

SciTech Connect

A simulation of the possible consequences of a doubling of the CO{sub 2} content of the atmosphere has been performed with a low resolution global climatic model. The model included the diurnal and seasonal computed sea ice amount and cloud cover, and used implied oceanic heat fluxes to represent transport processes in the oceans. A highly responsive 2-layer soil moisture formulation was also incorporated. Twenty year equilibrated simulations for control (1xCO{sub 2}) and greenhouse (2xCO{sub 2}) conditions were generated. The major emphasis of the analysis presented here is on the intra-annual and interannual variability of the greenhouse run with respect to the control run. This revealed considerable differences from the time-averaged results with occasions of marked positive and negative temperature deviations. Of particular interest were the periods of negative temperature departures compared to the control run which were identified, especially over the Northern Hemisphere continents. Temporal and spatial precipitation and soil moisture anomalies also occurred, some of which were related to the surface temperature changes. Substantial sea surface temperature anomalies were apparent in the greenhouse run, indicating that a source of climatic forcing existed in addition to that due to doubling of the CO{sub 2}. Comparison of the intra-annual and interannual variability of the control run with that of the greenhouse run suggests that, in many situations, it will be difficult to identify a greenhouse signal against the intrinsic natural variability of the climatic system. 35 refs., 20 figs., 1 tab.

Gordon, H.B.; Hunt, B.G. [CSIRO Division of Atmospheric Research, Victoria (Austria)

1994-01-01T23:59:59.000Z

105

Massive Variability Surveys from Venezuela  

E-Print Network (OSTI)

At the Venezuela National Astronomical Observatory we are carrying out variability surveys spanning many hundreds of square degrees near the celestial equator, using an 8k x 8k CCD Mosaic Camera optimized for drift-scanning on a 1m Schmidt telescope. Among the initial efforts was a project to obtain the first moderately deep, homogeneous sample of young stars over an area of ? 180sqr.deg. encompassing the entire Orion OB1 association, one of the nearest and most active regions of star formation. The results show that variability is a powerful technique to identify pre-main sequence populations, specially in sparse areas devoid of gas and dust. We are currently developing a massive database, equipped with web-based data mining tools, that will make our data and results available to the astronomical community. 1.

C. D. Impey; C. E. Petry; César Briceńo

2003-01-01T23:59:59.000Z

106

Massive Variability Surveys from Venezuela  

E-Print Network (OSTI)

At the Venezuela National Astronomical Observatory we are carrying out variability surveys spanning many hundreds of square degrees near the celestial equator, using an 8k x 8k CCD Mosaic Camera optimized for drift-scanning on a 1m Schmidt telescope. Among the initial efforts was a project to obtain the first moderately deep, homogeneous sample of young stars over an area of ~180sqr.deg. encompassing the entire Orion OB1 association, one of the nearest and most active regions of star formation. The results show that variability is a powerful technique to identify pre-main sequence populations, specially in sparse areas devoid of gas and dust. We are currently developing a massive database, equipped with web-based data mining tools, that will make our data and results available to the astronomical community.

Briceńo, C

2003-01-01T23:59:59.000Z

107

Massive Variability Surveys from Venezuela  

E-Print Network (OSTI)

At the Venezuela National Astronomical Observatory we are carrying out variability surveys spanning many hundreds of square degrees near the celestial equator, using an 8k x 8k CCD Mosaic Camera optimized for drift-scanning on a 1m Schmidt telescope. Among the initial efforts was a project to obtain the first moderately deep, homogeneous sample of young stars over an area of ~180sqr.deg. encompassing the entire Orion OB1 association, one of the nearest and most active regions of star formation. The results show that variability is a powerful technique to identify pre-main sequence populations, specially in sparse areas devoid of gas and dust. We are currently developing a massive database, equipped with web-based data mining tools, that will make our data and results available to the astronomical community.

Cesar Briceno

2003-04-03T23:59:59.000Z

108

Variability aware SVM macromodel based design centering of analog circuits  

Science Conference Proceedings (OSTI)

Design centering is the term used for a procedure of obtaining enhanced parametric yield of a circuit despite the variations in device and design parameters. The process variability in nanometer regimes manifest into variations in these devices and design ... Keywords: Analog circuit sizing, Design centering, Genetic algorithm, Macromodels, Support vector machine, Yield

D. Boolchandani; Lokesh Garg; Sapna Khandelwal; Vineet Sahula

2012-10-01T23:59:59.000Z

109

Time Scale and Feedback of Zonal-Mean-Flow Variability  

Science Conference Proceedings (OSTI)

The physical processes that determine the time scale of zonal-mean-flow variability are examined with an idealized numerical model that has a zonally symmetric lower boundary. In the part of the parameter space where the time-mean zonal flow is ...

Seok-Woo Son; Sukyoung Lee; Steven B. Feldstein; John E. Ten Hoeve

2008-03-01T23:59:59.000Z

110

Lecture 2227 Continuous Random Variables  

E-Print Network (OSTI)

-x/100 dx = -e-x/100 100 0 = 1 - e-1 = .632 text typo Example 3 (Light Bulb): The lifetime X, in hours, of a certain kind of light bulb is a continuous random variable with density f(x) = 1500 x2 I(1500,) Check = 1 4 = p Let B denote the number of failures before 2000 hours among 5 light bulbs. Then P(B 1) = P

Scholz, Fritz

111

Lecture 2227 Continuous Random Variables  

E-Print Network (OSTI)

) = 100 0 1 100 e-x/100 dx = -e-x/100 100 0 = 1 - e-1 = .632 text typo Example 3 (Light Bulb): The lifetime X, in hours, of a certain kind of light bulb is a continuous random variable with density f 2000 1500 = 1 - 3 4 = 1 4 = p Let B denote the number of failures before 2000 hours among 5 light bulbs

Scholz, Fritz

112

Quantum computation and hidden variables  

E-Print Network (OSTI)

Many physicists limit oneself to an instrumentalist description of quantum phenomena and ignore the problems of foundation and interpretation of quantum mechanics. This instrumentalist approach results to "specialization barbarism" and mass delusion concerning the problem, how a quantum computer can be made. The idea of quantum computation can be described within the limits of quantum formalism. But in order to understand how this idea can be put into practice one should realize the question: "What could the quantum formalism describe?", in spite of the absence of an universally recognized answer. Only a realization of this question and the undecided problem of quantum foundations allows to see in which quantum systems the superposition and EPR correlation could be expected. Because of the "specialization barbarism" many authors are sure that Bell proved full impossibility of any hidden-variables interpretation. Therefore it is important to emphasize that in reality Bell has restricted to validity limits of the no- hidden-variables proof and has shown that two-state quantum system can be described by hidden variables. The later means that no experimental result obtained on two-state quantum system can prove the existence of superposition and violation of the realism. One should not assume before unambiguous experimental evidence that any two-state quantum system is quantum bit. No experimental evidence of superposition of macroscopically distinct quantum states and of a quantum bit on base of superconductor structure was obtained for the present. Moreover same experimental results can not be described in the limits of the quantum formalism.

V. V. Aristov; A. V. Nikulov

2010-07-12T23:59:59.000Z

113

Process Deviation  

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

0 Process Deviation 11_0304 Page 1 of 6 0 Process Deviation 11_0304 Page 1 of 6 EOTA - Business Process Document Title: Process Deviation Document Number: P-010 Rev 11-0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): F-013 Process Deviation Form, P-008 Corrective/Preventive Action, F-014 Process Deviation Log, ADMP-001 Procurement Process P-010 Process Deviation 11_0304 Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 08_0822 Process assigned to new owner. Process and flowchart modified to require completion of all items on F-013. 09_0122 Process and flowchart modified to reflect process modifications.

114

Nonferromagnetic linear variable differential transformer  

DOE Patents (OSTI)

A nonferromagnetic linear variable differential transformer for accurately measuring mechanical displacements in the presence of high magnetic fields is provided. The device utilizes a movable primary coil inside a fixed secondary coil that consists of two series-opposed windings. Operation is such that the secondary output voltage is maintained in phase (depending on polarity) with the primary voltage. The transducer is well-suited to long cable runs and is useful for measuring small displacements in the presence of high or alternating magnetic fields.

Ellis, James F. (Powell, TN); Walstrom, Peter L. (Oak Ridge, TN)

1977-06-14T23:59:59.000Z

115

Proposal Process  

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

Proposal Process R&D Overview 100G Testbed Testbed Description Testbed Results Current Testbed Research Proposal Process Terms and Conditions Virtual Circuits (OSCARS) Performance...

116

Processing Division  

Science Conference Proceedings (OSTI)

Advances the processing knowledge and managerial skills by providing a forum of technical information and networking opportunities. Processing Division Divisions achievement agricultural analytical application award awards biotechnology detergents

117

EIS Process  

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

Process The EIS Process The two Conversion Facility EISs have been prepared pursuant to the National Environmental Policy Act (NEPA) of 1969, Council on Environmental Quality NEPA...

118

Variable Average Absolute Percent Differences  

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

Variable Variable Average Absolute Percent Differences Percent of Projections Over- Estimated Gross Domestic Product Real Gross Domestic Product (Average Cumulative Growth)* (Table 2) 1.0 42.6 Petroleum Imported Refiner Acquisition Cost of Crude Oil (Constant $) (Table 3a) 35.2 18.6 Imported Refiner Acquisition Cost of Crude Oil (Nominal $) (Table 3b) 34.7 19.7 Total Petroleum Consumption (Table 4) 6.2 66.5 Crude Oil Production (Table 5) 6.0 59.6 Petroleum Net Imports (Table 6) 13.3 67.0 Natural Gas Natural Gas Wellhead Prices (Constant $) (Table 7a) 30.7 26.1 Natural Gas Wellhead Prices (Nominal $) (Table 7b) 30.0 27.1 Total Natural Gas Consumption (Table 8) 7.8 70.2 Natural Gas Production (Table 9) 7.1 66.0 Natural Gas Net Imports (Table 10) 29.3 69.7 Coal Coal Prices to Electric Generating Plants (Constant $)** (Table 11a)

119

DETECTING VARIABILITY IN MASSIVE ASTRONOMICAL TIME-SERIES DATA. II. VARIABLE CANDIDATES IN THE NORTHERN SKY VARIABILITY SURVEY  

SciTech Connect

We present variability analysis of data from the Northern Sky Variability Survey (NSVS). Using the clustering method, which defines variable candidates as outliers from large clusters, we cluster 16,189,040 light curves having data points at more than 15 epochs as variable and non-variable candidates in 638 NSVS fields. Variable candidates are selected depending on how strongly they are separated from the largest cluster and how rarely they are grouped together in eight-dimensional space spanned by variability indices. All NSVS light curves are also cross-correlated with IRAS, AKARI, Two Micron All Sky Survey, Sloan Digital Sky Survey (SDSS), and GALEX objects, as well as known objects in the SIMBAD database. The variability analysis and cross-correlation results are provided in a public online database, which can be used to select interesting objects for further investigation. Adopting conservative selection criteria for variable candidates, we find about 1.8 million light curves as possible variable candidates in the NSVS data, corresponding to about 10% of our entire NSVS sample. Multi-wavelength colors help us find specific types of variability among the variable candidates. Moreover, we also use morphological classification from other surveys such as SDSS to suppress spurious cases caused by blending objects or extended sources due to the low angular resolution of the NSVS.

Shin, Min-Su [Department of Astronomy, The University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States); Yi, Hahn; Kim, Dae-Won; Chang, Seo-Won [Department of Astronomy, Yonsei University, Seoul 120-749 (Korea, Republic of); Byun, Yong-Ik, E-mail: msshin@umich.edu, E-mail: yihahn@galaxy.yonsei.ac.kr, E-mail: dakim@cfa.harvard.edu, E-mail: seowony@galaxy.yonsei.ac.kr, E-mail: ybyun@yonsei.ac.kr [Department of Astronomy and University Observatory, Yonsei University, Seoul 120-749 (Korea, Republic of)

2012-03-15T23:59:59.000Z

120

Modeling the Effect of Land Surface Evaporation Variability on Precipitation Variability. Part I: General Response  

Science Conference Proceedings (OSTI)

This is the first of a two-part article that investigates the impact of land surface evaporation variability on the interannual variability of precipitation and compares it with the impact caused by sea surface temperature variability. Previous ...

Oreste Reale; Paul Dirmeyer

2002-08-01T23:59:59.000Z

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


121

Sources of Variability of Evapotranspiration in California  

Science Conference Proceedings (OSTI)

The variability (1990–2002) of potential evapotranspiration estimates (ETo) and related meteorological variables from a set of stations from the California Irrigation Management System (CIMIS) is studied. Data from the National Climatic Data ...

Hugo G. Hidalgo; Daniel R. Cayan; Michael D. Dettinger

2005-02-01T23:59:59.000Z

122

Thermocline Variability in Different Dynamic Regions  

Science Conference Proceedings (OSTI)

The response of thermocline circulation to a variable wind forcing is investigated with quasigeostrophic models. The physical mechanism responsible for the different variability features in various dynamic regions has been highlighted. Special ...

Zhengye Liu

1996-08-01T23:59:59.000Z

123

Incremental Closure of Free Variable Tableaux  

Science Conference Proceedings (OSTI)

This paper presents a technique for automated theorem proving with free variable tableaux that does not require backtracking. Most existing automated proof procedures using free variable tableaux require iterative deepening and backtracking over applied ...

Martin Giese

2001-06-01T23:59:59.000Z

124

SLUDGE BATCH 7B GLASS VARIABILITY STUDY  

SciTech Connect

The Defense Waste Processing Facility (DWPF) is preparing to initiate processing Sludge Batch 7b (SB7b). In support of the upcoming processing, the Savannah River National Laboratory (SRNL) provided a recommendation to utilize Frits 418 with a 6% Na{sub 2}O addition (26 wt% Na{sub 2}O in sludge) and 702 with a 4% Na{sub 2}O addition (24 wt% Na{sub 2}O in sludge) to process SB7b. This recommendation was based on assessments of the compositional projections for SB7b available at the time from the Savannah River Remediation (SRR). To support qualification of SB7b, SRNL executed a variability study to assess the applicability of the current durability models for SB7b. The durability models were assessed over the expected composition range of SB7b, including potential caustic additions, combined with Frits 702 and 418 over a 32-40% waste loading (WL) range. Thirty four glasses were selected based on Frits 418 and 702 coupled with the sludge projections with an additional 4-6% Na{sub 2}O to reflect the potential caustic addition. Six of these glasses, based on average nominal sludge compositions including the appropriate caustic addition, were developed for both Frit 418 and Frit 702 at 32, 36 and 40% WL to provide coverage in the center of the anticipated SB7b glass region. All glasses were fabricated and characterized using chemical composition analysis, X-ray diffraction (XRD) and the Product Consistency Test (PCT). To comply with the DWPF Glass Product Control Program, a total of thirty four glasses were fabricated to assess the applicability of the current DWPF PCCS durability models. Based on the measured PCT response, all of the glasses were acceptable with respect to the Environmental Assessment (EA) benchmark glass regardless of thermal history. The NL[B] values of the SB7b variability study glasses were less than 1.99 g/L as compared to 16.695 g/L for EA. A small number of the D-optimally selected 'outer layer' extreme vertices (EV) glasses were not predictable using the current Product Composition Control System (PCCS) models for durability, but were acceptable compared to the EA glass when tested. These glasses fell outside of the lower 95% confidence band, which demonstrates conservatism in the model. A few of the glasses fell outside of the upper 95% confidence band; however, these particular glasses have normalized release values that were much lower than the values of EA and should be of no practical concern. Per the requirements of the DWPF Glass Product Control Program, the PCCS durability models have been shown to be applicable to the SB7b sludge system with a range of Na{sub 2}O concentrations blended with Frits 418 or 702. PCT results from the glasses fabricated as part of the variability study were shown to be predictable by the current DWPF PCCS models and/or acceptable with respect to the EA benchmark glass regardless of thermal history or compositional view.

Johnson, F.; Edwards, T.

2011-10-25T23:59:59.000Z

125

HIGH LEVEL WASTE SLUDGE BATCH 4 VARIABILITY STUDY  

Science Conference Proceedings (OSTI)

The Defense Waste Processing Facility (DWPF) is preparing for vitrification of High Level Waste (HLW) Sludge Batch 4 (SB4) in early FY2007. To support this process, the Savannah River National Laboratory (SRNL) has provided a recommendation to utilize Frit 503 for vitrifying this sludge batch, based on the composition projection provided by the Liquid Waste Organization on June 22, 2006. Frit 418 was also recommended for possible use during the transition from SB3 to SB4. A critical step in the SB4 qualification process is to demonstrate the applicability of the durability models, which are used as part of the DWPF's process control strategy, to the glass system of interest via a variability study. A variability study is an experimentally-driven assessment of the predictability and acceptability of the quality of the vitrified waste product that is anticipated from the processing of a sludge batch. At the DWPF, the durability of the vitrified waste product is not directly measured. Instead, the durability is predicted using a set of models that relate the Product Consistency Test (PCT) response of a glass to the chemical composition of that glass. In addition, a glass sample is taken during the processing of that sludge batch, the sample is transmitted to SRNL, and the durability is measured to confirm acceptance. The objective of a variability study is to demonstrate that these models are applicable to the glass composition region anticipated during the processing of the sludge batch - in this case the Frit 503 - SB4 compositional region. The success of this demonstration allows the DWPF to confidently rely on the predictions of the durability/composition models as they are used in the control of the DWPF process.

Fox, K; Tommy Edwards, T; David Peeler, D; David Best, D; Irene Reamer, I; Phyllis Workman, P

2006-10-02T23:59:59.000Z

126

Simulating Random Natural Variability in Time-Varying Atmospheric  

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

Simulating Random Natural Variability in Time-Varying Atmospheric Simulating Random Natural Variability in Time-Varying Atmospheric Concentrations of Toxic Gas from Pipeline Ruptures Speaker(s): David J. Wilson Date: February 4, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Jeiwon Deputy Random time series are found everywhere in nature. The Brownian motion of small particles; the price of assets (stocks) in financial markets; the diffusion of individual molecules through a membrane; the ballistic deposition of nano-particles onto a lattice substrate; and the time-varying concentration fluctuations at a point downwind from a pollution source all have a common dynamic description. All are stochastic processes where the local rate of change of the variable has a natural drift back to some equilibrium state, combined with a random fluctuating component. We will

127

Hydrocarbon Processing`s refining processes `96  

Science Conference Proceedings (OSTI)

The paper compiles information on the following refining processes: alkylation, benzene reduction, benzene saturation, catalytic cracking, catalytic reforming, coking, crude distillation, deasphalting, deep catalytic cracking, electrical desalting, ethers, fluid catalytic cracking, hydrocracking, hydrogenation, hydrotreating, isomerization, resid catalytic cracking, treating, and visbreaking. The application, products, a description of the process, yield, economics, installation, and licensor are given for each entry.

NONE

1996-11-01T23:59:59.000Z

128

Adaptive sampling for Bayesian variable selection  

E-Print Network (OSTI)

Adaptive sampling for Bayesian variable selection DAVID J. NOTT Department of Statistics for variable selection and for dealing with model un- certainty have become increasingly popular in recent consider adaptive Markov chain Monte Carlo schemes for Bayesian variable selection in Gaussian linear

Blennerhassett, Peter

129

Variable ratio regenerative braking device  

DOE Patents (OSTI)

Disclosed is a regenerative braking device (10) for an automotive vehicle. The device includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (36) and an output shaft (42), clutches (38, 46) and brakes (40, 48) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. The rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft is clutched to the transmission while the brake on the output shaft is applied, and are torsionally relaxed to deliver energy to the vehicle when the output shaft is clutched to the transmission while the brake on the input shaft is applied. The transmission ratio is varied to control the rate of energy accumulation and delivery for a given rotational speed of the vehicle drivetrain.

Hoppie, Lyle O. (Birmingham, MI)

1981-12-15T23:59:59.000Z

130

Variable residence time vortex combustor  

DOE Patents (OSTI)

A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

1987-01-01T23:59:59.000Z

131

Simulated Physical Mechanisms Associated with Climate Variability over Lake Victoria Basin in East Africa  

Science Conference Proceedings (OSTI)

A fully coupled regional climate, 3D lake modeling system is used to investigate the physical mechanisms associated with the multiscale variability of the Lake Victoria basin climate. To examine the relative influence of different processes on ...

Richard O. Anyah; Fredrick H. M. Semazzi; Lian Xie

2006-12-01T23:59:59.000Z

132

Inverse Modeling of Intra-annual Variability in the Subtropical North Pacific  

Science Conference Proceedings (OSTI)

Climatological data on the oceanic and atmospheric variability are inverted to study seasonal variation of the Kuroshio Extension (KE) and the recirculation gyre to the south. The processed datasets include climatological fluxes of heat, salt, ...

Max Yaremchuk; Konstantin Lebedev

2002-10-01T23:59:59.000Z

133

Space–Time Variability of Rainfall and Extreme Flood Response in the Menomonee River Basin, Wisconsin  

Science Conference Proceedings (OSTI)

The hydrometeorological processes that control flash flooding are examined through analyses of space–time rainfall variability and flood response in the Milwaukee metropolitan region. The analyses focus on four flood events in the Menomonee River ...

Yu Zhang; James A. Smith

2003-06-01T23:59:59.000Z

134

Changes in Interannual Variability and Decadal Potential Predictability under Global Warming  

Science Conference Proceedings (OSTI)

Global warming will result in changes in mean temperature and precipitation distributions and is also expected to affect interannual and longer time-scale internally generated variability as a consequence of changes in climate processes and ...

G. J. Boer

2009-06-01T23:59:59.000Z

135

Using CMAQ for Exposure Modeling and Characterizing the Subgrid Variability for Exposure Estimates  

Science Conference Proceedings (OSTI)

Atmospheric processes and the associated transport and dispersion of atmospheric pollutants are known to be highly variable in time and space. Current air-quality models that characterize atmospheric chemistry effects, for example, the Community ...

Vlad Isakov; John S. Irwin; Jason Ching

2007-09-01T23:59:59.000Z

136

Mechanisms of Decadal Arctic Climate Variability in the Community Climate System Model, Version 2 (CCSM2)  

Science Conference Proceedings (OSTI)

Several mechanisms have been proposed to explain natural climate variability in the Arctic. These include processes related to the influence of the North Atlantic Oscillation/Arctic Oscillation (NAO/AO), anticyclonic/cyclonic regimes, changes in ...

Hugues Goosse; Marika M. Holland

2005-09-01T23:59:59.000Z

137

Observations of Variability on Synoptic Timescales in the East Pacific ITCZ  

Science Conference Proceedings (OSTI)

Data obtained in the eastern Pacific intertropical convergence zone (ITCZ) during the Tropical Eastern Pacific Process Study (TEPPS) show a 3–6-day variability. The NOAA ship Ronald H. Brown collected surface meteorological observations, C-band ...

Yolande L. Serra; Robert A. Houze Jr.

2002-05-01T23:59:59.000Z

138

Land Surface Hydrology Parameterization for Atmospheric General Circulation models Including Subgrid Scale Spatial Variability  

Science Conference Proceedings (OSTI)

Parameterizations are developed for the representation of subgrid hydrologic processes in atmospheric general circulation models. Reasonable a priori probability density functions of the spatial variability of soil moisture and of precipitation ...

D. Entekhabi; P. S. Eagleson

1989-08-01T23:59:59.000Z

139

Dynamics of marine zooplankton : social behavior, ecological interactions, and physically-induced variability  

E-Print Network (OSTI)

Marine ecosystems reflect the physical structure of their environment and the biological processes they carry out. This leads to spatial heterogeneity and temporal variability, some of which is imposed externally and some ...

Verdy, Ariane

2008-01-01T23:59:59.000Z

140

Potential Enthalpy: A Conservative Oceanic Variable for Evaluating Heat Content and Heat Fluxes  

Science Conference Proceedings (OSTI)

Potential temperature is used in oceanography as though it is a conservative variable like salinity; however, turbulent mixing processes conserve enthalpy and usually destroy potential temperature. This negative production of potential ...

Trevor J. McDougall

2003-05-01T23:59:59.000Z

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


141

Indian Ocean Climate and Dipole Variability in Hadley Centre Coupled GCMs  

Science Conference Proceedings (OSTI)

Prediction of Indian Ocean interannual variability may be limited by the systematic biases in coupled GCMs or by a lack of resolution of the processes involved. In particular, little is known about the impact of ocean resolution on simulated ...

Hilary Spencer; Rowan T. Sutton; Julia M. Slingo; Malcolm Roberts; Emily Black

2005-07-01T23:59:59.000Z

142

Effects of Weather Variability and Soil Parameter Uncertainty on the Soil-Crop-Climate System  

Science Conference Proceedings (OSTI)

The variability of crop and soil states due to uncertain climatic inputs and soil properties is quantified using a mathematical representation of the physiological, biochemical, hydrological, and physical processes related to plant growth. The ...

Angelos L. Protopapas; Rafael L. Bras

1993-04-01T23:59:59.000Z

143

Impacts of Historic Climate Variability on Seasonal Soil Frost in the Midwestern United States  

Science Conference Proceedings (OSTI)

The present study examines the effects of historic climate variability on cold-season processes, including soil temperature, frost depth, and the number of frost days and freeze–thaw cycles. Considering the importance of spatial and temporal ...

Tushar Sinha; Keith A. Cherkauer; Vimal Mishra

2010-04-01T23:59:59.000Z

144

Sensitivity of 5-cm Wavelength Polarimetric Radar Variables to Raindrop Axial Ratio and Drop Size Distribution  

Science Conference Proceedings (OSTI)

The sensitivity of polarimetric variables at a 5-cm wavelength to raindrop size and axial ratio is examined using T-matrix modeling of the scattering process for gamma raindrop size distributions fitted to tropical rainfall collected at Darwin, ...

T. D. Keenan; L. D. Carey; D. S. Zrni?; P. T. May

2001-03-01T23:59:59.000Z

145

Wet Equivalent Potential Temperature and Enthalpy as Prognostic Variables in Cloud Modeling  

Science Conference Proceedings (OSTI)

The bulk thermodynamic consequences of nonreversible phase changes and of the precipitation process are emphasized. Two predictive quantities are proposed, either of which can be used as a prognostic thermodynamic variable, instead of temperature ...

Y. Pointin

1984-02-01T23:59:59.000Z

146

Process Deviation  

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

10 Course/Analysis Initiation Process 11_0512 Page 1 of 6 10 Course/Analysis Initiation Process 11_0512 Page 1 of 6 EOTA - Business Process Document Title: Course/Analysis Initiation Process Document Number: ISDP- 010 Rev 11_0512 Document Owner: Elizabeth Sousa Backup Owner: Vickie Pleau Approver(s): Melissa Otero Parent Document: ISDP-002, Training Production Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-001 Technical Direction, ISDF-035 Analysis Feasibility Assessment, ISDP-010, Course Analysis Initiation Process, ISDP-015, WBT/ILT/Ex Design Process ISDP-010 Course/Analysis Initiation Process 11_0512 Page 2 of 6 Revision History: Rev. Description of Change 10_0630 Initial Release 11_0512 Modified verbiage for clarification and updated referenced documents.

147

Process Deviation  

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

4 Course Evaluation and Close-out Process 10_0630 Page 1 of 5 4 Course Evaluation and Close-out Process 10_0630 Page 1 of 5 EOTA - Business Process Document Title: Course Evaluation and Close-out Process Document Number: ISDP-014 Rev. 10_0630 Document Owner: Vickie Pleau Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ISDP-002, Training Production Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-011, ISD History File Acceptance, ISDF-012, ISD History File Checklist ISDP-014 Course Evaluation and Close-out Process 10_0630 Page 2 of 5 Revision History: Rev. Description of Change 10_0630 Initial Release ISDP-014 Course Evaluation and Close-out Process 10_0630 Page 3 of 5 I. Purpose To effectively plan and control the process for evaluating and finalizing EOTA ILT, EX and WBT training products, assuring

148

Hard X-ray Variability of AGN  

E-Print Network (OSTI)

Aims: Active Galactic Nuclei are known to be variable throughout the electromagnetic spectrum. An energy domain poorly studied in this respect is the hard X-ray range above 20 keV. Methods: The first 9 months of the Swift/BAT all-sky survey are used to study the 14 - 195 keV variability of the 44 brightest AGN. The sources have been selected due to their detection significance of >10 sigma. We tested the variability using a maximum likelihood estimator and by analysing the structure function. Results: Probing different time scales, it appears that the absorbed AGN are more variable than the unabsorbed ones. The same applies for the comparison of Seyfert 2 and Seyfert 1 objects. As expected the blazars show stronger variability. 15% of the non-blazar AGN show variability of >20% compared to the average flux on time scales of 20 days, and 30% show at least 10% flux variation. All the non-blazar AGN which show strong variability are low-luminosity objects with L(14-195 keV) < 1E44 erg/sec. Conclusions: Concerning the variability pattern, there is a tendency of unabsorbed or type 1 galaxies being less variable than the absorbed or type 2 objects at hardest X-rays. A more solid anti-correlation is found between variability and luminosity, which has been previously observed in soft X-rays, in the UV, and in the optical domain.

V. Beckmann; S. D. Barthelmy; T. J. -L. Courvoisier; N. Gehrels; S. Soldi; J. Tueller; G. Wendt

2007-09-14T23:59:59.000Z

149

Process Deviation  

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

5 WBT/ILT/EX Course Design Process 10_0630 Page 1 of 6 5 WBT/ILT/EX Course Design Process 10_0630 Page 1 of 6 EOTA - Business Process Document Title: WBT/ILT/EX Course Design Process Document Number: ISDP-015 Rev. 10_0630 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ISDP-002, Training Production Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-046 Training Design/Development Summary, ISDF-004 Design Document, ISDF-006A WBT Script Template, ISDF- 007 Lesson Plan Template, ISDF-012, ISD History File Checklist ISDP-015 WBT/ILT/EX Course Design Process 10_0630 Page 2 of 6 Revision History: Rev. Description of Change 10_0630 Initial Release ISDP-015 WBT/ILT/EX Course Design Process 10_0630 Page 3 of 6

150

Process Deviation  

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

5 Website Development-Maintenance Process 11_0419Page 1 of 6 5 Website Development-Maintenance Process 11_0419Page 1 of 6 EOTA - Business Process Document Title: Website Development-Maintenance Process Document Number: ITTP-015 Rev. 11_0419 Document Owner: Benjamin Aragon Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: ITT Referenced Document(s): ITTF-016 Website Development/Maintenance Log, ISDP-002 Training Production Process ITTP-015 Website Development-Maintenance Process 11_0419Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 11_0419 Deleted decision point 2.1 and 2.2, incorporated Notifying Requester into step 2.0, modified verbiage for clarification. ITTP-015 Website Development-Maintenance Process 11_0419Page 3 of 6

151

Process Deviation  

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

7 Exercise Development Process 11_0414 Page 1 of 8 7 Exercise Development Process 11_0414 Page 1 of 8 EOTA - Business Process Document Title: Exercise Development Process Document Number: ISDP-017 Revision 11_0414 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ISDP-002, Training Product Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-001 Technical Direction, ISDF-004 Design Document, ISDF-006 WBT Script Template, ISDF-007 Lesson Plan Template, ITTP-016 WBT Programming ISDP-017 Exercise Development Process 11_0414 Page 2 of 8 Revision History: Rev. Description of Change 10_0630 Initial Release 11_0223 Made changes to accurately reflect TPP. 11_0414 Added Derivative Classifier to step 12.0 ISDP-017 Exercise Development Process 11_0414 Page 3 of 8

152

Variable Frequency Drives: Energy Savings and Impact on Motor Performance  

E-Print Network (OSTI)

Variable frequency drives (VFDs) have found widespread application in recent years. VFDs are valued for their potential to save energy and improve processes. Reliability has improved significantly, but there are still pitfalls to be addressed in properly applying VFDs. The benefits and pitfalls in applying VFDs that will be addressed by this paper include- Benefits: Energy Savings, Improved Process Control, “Soft Start” Reduced Mechanical Stress, Improved Electrical System Power Factor, and Pitfalls: Motor Acoustic Noise, Motor Heating. This paper is intended for plant engineers and maintenance personnel who have some practical experience with electrical and mechanical equipment, but are not VFD experts.

Petro, D.

1993-03-01T23:59:59.000Z

153

Definition: Variable Peak Pricing | Open Energy Information  

Open Energy Info (EERE)

Variable Peak Pricing Variable Peak Pricing Jump to: navigation, search Dictionary.png Variable Peak Pricing Variable Peak Pricing (VPP) is a hybrid of time-of-use and real-time pricing where the different periods for pricing are defined in advance (e.g., on-peak=6 hours for summer weekday afternoon; off-peak= all other hours in the summer months), but the price established for the on-peak period varies by utility and market conditions.[1] Related Terms real-time pricing References ↑ https://www.smartgrid.gov/category/technology/variable_peak_pricing [[C LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ategory: Smart Grid Definitionssmart grid,off-peak,on-peak,smart grid, |Template:BASEPAGENAME]]smart grid,off-peak,on-peak,smart grid, Retrieved from "http://en.openei.org/w/index.php?title=Definition:Variable_Peak_Pricing&oldid=50262

154

Envera Variable Compression Ratio Engine  

DOE Green Energy (OSTI)

Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to {approx}9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsiz

Charles Mendler

2011-03-15T23:59:59.000Z

155

Monitoring of Photovoltaic Plant Output and Variability  

Science Conference Proceedings (OSTI)

The performance of photovoltaic (PV) systems, including variability characteristics, is of increasing interest to utilities as they integrate more solar energy onto the electric grid. This study is part of a multi-year research series to investigate influencing factors that affect PV plant output, variability, and approaches to system management. It explores PV variability both from a grid perspective and through examination of project design aspects that can affect annual power production. ...

2012-12-12T23:59:59.000Z

156

Process Deviation  

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

5 Functional/Job/Task Analysis Process 11_0718 Page 1 of 8 5 Functional/Job/Task Analysis Process 11_0718 Page 1 of 8 EOTA - Business Process Document Title: Functional/Job/Task Analysis Process Document Number: ISDP-005 Rev 11_0718 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: PM2 Referenced Document(s): ISDF-XXX Vision User Guide (currently being developed ) ISDP-005 Functional/Job/Task Analysis Process 11_0718 Page 2 of 8 Revision History: Rev. Description of Change 08_0410 Initial Release 10_0630 Process modified to match steps within the TPP 11_0718 Minor editorial changes; changed step 8.0 from Task-to-Training Matrix to "Analysis"-to-Training Matrix.

157

NERC Presentation: Accommodating High Levels of Variable Generation...  

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

high levels of variable electricity eneration. Variable resources are types of electric power generation that rely on an uncontrolled, "variable" fuel (e.g. wind, sunlight,...

158

The use of 'race' as a variable in biomedical research  

E-Print Network (OSTI)

a variable in biomedical research but mainly to monitor thea Variable in Biomedical Research A dissertation submittedVariable in Biomedical Research…………. Manifest, Operative and

Efstathiou, Sophia

2009-01-01T23:59:59.000Z

159

Natural Gas Variability In California: Environmental Impacts...  

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

Natural Gas Variability In California: Environmental Impacts And Device Performance, Combustion Modeling of Pollutant Emissions From a Residential Cooking Range Title Natural Gas...

160

NREL: Transmission Grid Integration - Variability of Renewable...  

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

as variable generation sources because their electricity production varies based on the availability of wind and sun. However, they are not the only source of variation in a...

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


161

Variable-Period Undulators for Synchrotron Radiation  

DOE Patents (OSTI)

A new and improved undulator design is provided that enables a variable period length for the production of synchrotron radiation from both medium-energy and high energy storage rings. The variable period length is achieved using a staggered array of pole pieces made up of high permeability material, permanent magnet material, or an electromagnetic structure. The pole pieces are separated by a variable width space. The sum of the variable width space and the pole width would therefore define the period of the undulator. Features and advantages of the invention include broad photon energy tunability, constant power operation and constant brilliance operation.

Shenoy, Gopal; Lewellen, John; Shu, Deming; Vinokurov, Nikolai

2005-02-22T23:59:59.000Z

162

aluminum processing  

Science Conference Proceedings (OSTI)

Refining of Potroom Metal Using the Hydro Ram Crucible Fluxing Process [pp. .... Approachgeneration of Aluminum Wrought Alloy Scrap of Old Cars [pp.

163

materials processing  

Science Conference Proceedings (OSTI)

... of the Stainless Steel Elaborated by the Duplex Procedure (Electric Furnace- VOD Installation) [pp. ... Materials Processing on a Solar Furnace Satellite [pp.

164

Geographical Distribution of Biomass Carbon in Tropical Southeast Asian  

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

1. Redistribution of the data as a result of the resampling process 1. Redistribution of the data as a result of the resampling process Variable Number of name unique values Minimum Maximum Cell size Grid name AC 281 7 383 3.75 km BIOMASS AC 279 7 336 0.25 degree BIOMASSX PC 30 14 393 3.75 km BIOMASS PC 288 43 402 0.25 degree BIOMASSX CLIMI 20 1 20 3.75 km CLIMATE CLIMI 20 1 20 0.25 degree CLIMATEX PRECIP 13 1 13 3.75 km CLIMATE PRECIP 13 1 13 0.25 degree CLIMATEX POP 14 1 14 3.75 km DEMOG

165

Artificial intelligence for monitoring and supervisory control of process systems  

Science Conference Proceedings (OSTI)

Complex processes involve many process variables, and operators faced with the tasks of monitoring, control, and diagnosis of these processes often find it difficult to effectively monitor the process data, analyse current states, detect and diagnose ... Keywords: Artificial intelligence techniques, Framework for intelligent system development, Integrated systems, Monitoring and control, Process industry

Varanon Uraikul; Christine W. Chan; Paitoon Tontiwachwuthikul

2007-03-01T23:59:59.000Z

166

Microarchitecture parameter selection to optimize system performance under process variation  

Science Conference Proceedings (OSTI)

Design variability due to within-die and die-to-die process variations has the potential to significantly reduce the maximum operating frequency and the effective yield of high-performance microprocessors in future process technology generations. This ...

Xiaoyao Liang; David Brooks

2006-11-01T23:59:59.000Z

167

Process Developments  

Science Conference Proceedings (OSTI)

...Although melt loss had become the major cost factor in ingot production, it was the soaring cost of energy during the 1973 energy crisis that triggered the search for more-efficient remelt processes. This effort also sought to develop process that were less labor intensive and more...

168

Grassmann Variables in Jordan Matrix Models  

E-Print Network (OSTI)

Here we demonstrate the emergence of Grassmann variables in matrix models based on the exceptional Jordan algebra. The Grassmann algebras are built naturally using the octonion algebra. We argue the appearance of Grassmann variables solidifies the relationship between supersymmetry and triality.

Michael Rios

2005-03-02T23:59:59.000Z

169

THE MULTI-USE STEINEL VARIABLE TEMPERATURE  

E-Print Network (OSTI)

THE MULTI-USE STEINEL VARIABLE TEMPERATURE ELECTRONICALLY CONTROLLED HEAT GUNTEMPERATURE RANGE 212 COMBUSTIBLE LIQUIDS. DO NOT USE FOR: · Heating gas engines · Heating car batteries · Thawing refrigerator equipment Specifications Temperature Variable from 212° F to 1100° F Watts 1500W Weight 1.5 lbs. Supply

Kleinfeld, David

170

THE MULTI-USE STEINEL VARIABLE TEMPERATURE  

E-Print Network (OSTI)

THE MULTI-USE STEINEL VARIABLE TEMPERATURE ELECTRONICALLY CONTROLLED HEAT GUNTEMPERATURE RANGE 212 COMBUSTIBLE LIQUIDS. DO NOT USE FOR: · Heating gas engines · Heating car batteries · Thawing refrigerator equipment Specifications Temperature Variable from 212" F to 1100° F Watts 1500W Weight 1.5 lbs. Supply

Kleinfeld, David

171

Gradient based variable forgetting factor RLS algorithm  

Science Conference Proceedings (OSTI)

An accurate new variable forgetting factor recursive least-square adaptive algorithm is derived. An improved mean square behaviour analysis is presented, which shows that the theoretical analysis and the simulation results are close to each other. The ... Keywords: RLS algorithm, adaptive filters, variable forgetting factor

C. F. So; S. C. Ng; S. H. Leung

2003-06-01T23:59:59.000Z

172

Variable orifice using an iris shutter  

DOE Patents (OSTI)

A variable orifice forming mechanism utilizing an iris shutter arrangement adapted to control gas flow, conductance in vacuum systems, as a heat shield for furnace windows, as a beam shutter in sputtering operations, and in any other application requiring periodic or continuously-variable control of material, gas, or fluid flow.

Beeman, Raymond (El Cerrito, CA); Brajkovich, Steven J. (Fremont, CA)

1978-01-01T23:59:59.000Z

173

Internal Variability of Indian Ocean SST  

Science Conference Proceedings (OSTI)

A 40-yr integration of an eddy-resolving numerical model of the tropical Indian Ocean is analyzed to quantify the interannual variability that is caused by the internal variability of ocean dynamics. It is found that along the equator in the ...

Markus Jochum; Raghu Murtugudde

2005-09-01T23:59:59.000Z

174

Shimmed electron beam welding process  

DOE Patents (OSTI)

A modified electron beam welding process effects welding of joints between superalloy materials by inserting a weldable shim in the joint and heating the superalloy materials with an electron beam. The process insures a full penetration of joints with a consistent percentage of filler material and thereby improves fatigue life of the joint by three to four times as compared with the prior art. The process also allows variable shim thickness and joint fit-up gaps to provide increased flexibility for manufacturing when joining complex airfoil structures and the like.

Feng, Ganjiang (Clifton Park, NY); Nowak, Daniel Anthony (Alplaus, NY); Murphy, John Thomas (Niskayuna, NY)

2002-01-01T23:59:59.000Z

175

Casting Processes  

Science Conference Proceedings (OSTI)

Table 1   General characteristics of casting processes...casting processes Characteristic Casting process Green sand Resin-bonded sand Plaster Lost foam Investment Permanent mold Die Part Material (casting) All All Zn to Cu Al to cast iron All Zn to cast iron Zn to Cu Porosity and voids (a) C-E D-E D-E C-E E B-C A-C Shape (b) All All All All All Not T3, 5,...

176

Process Applications  

Science Conference Proceedings (OSTI)

...flash-welding applications include: Chain links Transmission bands Automotive flywheel ring gears Strips that are joined for continuous processing lines Wire and bar drawing operations for continuous stamping press

177

Process Deviation  

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

2 ILT Course Implementation 11_0512 Page 1 of 8 2 ILT Course Implementation 11_0512 Page 1 of 8 EOTA - Business Process Document Title: ILT Course Implementation Document Number: ISDP-012 Rev. 11_0512 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ISDP-002, Training Production Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-007 Lesson Plan Template, ISDF-014 Course Announcement, ISDF-010, After Action Report, ISDF-008 ILT Student Feedback Survey, ISDF-009, Design/Development Review Checklist, ITTF-014 Publication Review and Approval, ISDF-048, After Action Report Calculation Template, ISDP-011, Exercise Course Implementation Process, ITTP-015 Website Development/Maintenance Process, ISDF-015, ILT/EX Course Support Checklist

178

Process Heating  

Science Conference Proceedings (OSTI)

This technical update uses real world examples to discuss applications of electrotechnology in industrial process heating and to highlight some of the emerging technologies in this field. These emerging technologies, when implemented in a plant, will provide significant energy savings as well as increase productivity. The report presents three case studies of successful implementation of two different electric process-heating technologies in three different industries. The case studies show that in some ...

2011-12-07T23:59:59.000Z

179

Non-linear variable selection for artificial neural networks using partial mutual information  

Science Conference Proceedings (OSTI)

Artificial neural networks (ANNs) have been widely used to model environmental processes. The ability of ANN models to accurately represent the complex, non-linear behaviour of relatively poorly understood processes makes them highly suited to this task. ... Keywords: Artificial neural networks, Environmental modelling, Information theory, Input variable selection, Partial mutual information

Robert J. May; Holger R. Maier; Graeme C. Dandy; T.M.K. Gayani Fernando

2008-10-01T23:59:59.000Z

180

Nine New Variable Stars in Camelopardalis  

E-Print Network (OSTI)

Nine new short period variable stars have been discovered in the direction of the open cluster Cr464 in Camelopardalis. The field was observed using Tzec Maun Observatory's telescope AP180. Two new variable stars were classified as pulsating stars (RRab and RRc types). The other seven stars are binary systems. One of them is of ELL-type, four binaries were recognized as EW-type, and two systems are rather short period EA-type binaries. All new variables were registered in the VSX catalogue.

Virnina, Natalia A

2013-01-01T23:59:59.000Z

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


181

The Coordinated Control of a Central Air Conditioning System Based on Variable Chilled Water Temperature and Variable Chilled Water Flow  

E-Print Network (OSTI)

At present, regulation of water flow by means of pump frequency conversion is one of the major methods for power-saving in central air conditioning systems. In this article, optimization regulation for central air conditioning system on the basis of coordinative optimization control for variable chilled water temperature and variable chilled water flow to obtain better power savings is put forward. According to typical meteorological year data, hourly air conditioning load of whole year for every typical room has been calculated with the transmission function method. In order to guarantee each typical room, the highest cooling load rate is used as an input parameter for optimization calculation. Based on the surface cooler check model, the smallest energy consumption of chiller and chiller water pump was taken as the objective function of the optimization model. The performance characteristics of a chiller, water pump, regulation valve and pipeline are taken into account, and the optimization chilled water temperature and chilled water flow were carried out. The case study for a commercial building in Guangzhou showed that the annual power consumption of the chillers and pumps of the air conditioning system is lower by 17% only with employment of variable water flow regulation by pump frequency conversion. In the case of optimization control with coordinative control of variable chilled water temperature and variable chilled water flow, the annual power consumption of the chillers and pumps of the air conditioning system is reduced by 22% in presence of remarkable power saving effects. Increasing the chilled water temperature will reduce the dehumidified capability of the air cooler, and the indoor relative humidity will increase. The simulation showed that the adjustment optimized process meets the comfort of each typical room. The lower the cooling load rate is, the more obvious the effect of power-saving is. The highest power-saving rate appears in December, which is 36.7%. Meanwhile, the least rate appears in July, which is only 14.5%.

Liu, J.; Mai, Y.; Liu, X.

2006-01-01T23:59:59.000Z

182

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

DOE Patents (OSTI)

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

Kumar, Aditya; Shi, Ruijie; Dokucu, Mustafa

2013-09-17T23:59:59.000Z

183

Deposition Process  

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

Pulsed Plasma Processing Pulsed Plasma Processing NEW: Downloadable: Invited Talk "Pulsed Metal Plasmas," presented at the 2006 AVS Meeting, San Francisco, California, November 15, 2006. (PDF, file size 8 MB). Plasma Sources for Window Coatings Deposition processes for low-emittance and solar control coatings can be improved through the use of advanced plasma technology developed at LBNL. A new type of constricted glow-discharge plasma source was selected for the 1997 R&D 100 Award. Invented by LBNL researchers Andre Anders, Mike Rubin, and Mike Dickinson, the source was designed to be compatible with industrial vacuum deposition equipment and practice. Construction is simple, rugged and inexpensive. It can operate indefinitely over a wide range of chamber pressure without any consumable parts such as filaments or grids. Several different gases including Argon, Oxygen and Nitrogen have been tested successfully.

184

Process Deviation  

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

3 WBT Course Implementation 11_0512 Page 1 of 7 3 WBT Course Implementation 11_0512 Page 1 of 7 EOTA - Business Process Document Title: WBT Course Implementation Document Number: ISDP-013 Rev. 11_0512 Document Owner: Elizabeth Sousa Backup Owner: Vickie Pleau Approver(s): Melissa Otero Parent Document: ISDP-002, Training Product Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-014, Course Announcement Template, ITTF-014, Publication Review and Approval, ISDF-010 After Action Report, ISDF-042 Validation & Acceptance, ISDF-048, After Action Report Calculation Template, ITTP-015, Website Development Maintenance ISDP-013 WBT Course Implementation 11_0512 Page 2 of 7 Revision History: Rev. Description of Change 10_0630 Initial Release 11_0405 Added ISDF-048, After Action Report Calculation Template to process.

185

FLUORINATION PROCESS  

DOE Patents (OSTI)

A process for the fluorination of uranium metal is described. It is known that uranium will react with liquid chlorine trifluoride but the reaction proceeds at a slow rate. However, a mixture of a halogen trifluoride together with hydrogen fluoride reacts with uranium at a significantly faster rate than does a halogen trifluoride alone. Bromine trifluoride is suitable for use in the process, but chlorine trifluoride is preferred. Particularly suitable is a mixture of ClF/sub 3/ and HF having a mole ratio (moles

McMillan, T.S.

1957-10-29T23:59:59.000Z

186

Variability of EGRET Gamma-Ray Sources  

E-Print Network (OSTI)

The variability of the high-energy gamma ray sources in the Third EGRET catalog is analyzed by a new method. We re-analyze the EGRET data to calculate a likelihood function for the flux of each source in each observation, both for detections and upper limits. These functions can be combined in a uniform manner with a simple model of the flux distribution to characterize the flux variation by a confidence interval for the relative standard deviation of the flux. The main result is a table of these values for almost all the cataloged sources. As expected, the identified pulsars are steady emitters and the blazars are mostly highly variable. The unidentified sources are heterogeneous, with greater variation at higher Galactic latitude. There is an indication that pulsar wind nebulae are associated with variable sources. There is a population of variable sources along the Galactic plane, concentrated in the inner spiral arms.

P. L. Nolan; W. F. Tompkins; I. A. Grenier; P. F. Michelson

2003-07-10T23:59:59.000Z

187

Interannual Variability of Northwest Australian Tropical Cyclones  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) activity over the southeast Indian Ocean has been studied far less than other TC basins, such as the North Atlantic and northwest Pacific. The authors examine the interannual TC variability of the northwest Australian (NWAUS)...

Kevin H. Goebbert; Lance M. Leslie

2010-09-01T23:59:59.000Z

188

Variability of Southern Ocean Jets Near Topography  

Science Conference Proceedings (OSTI)

The interaction of jets with topography in the Southern Ocean is investigated using 19 years of altimetry data. In particular, the “jet jumping” mode of variability, by which two or more jets passing close to the same topographic feature show ...

Christopher C. Chapman; Rosemary Morrow

189

Integrating Variable Renewable Energy: Challenges and Solutions  

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

LLC This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.govpublications. Contract No. DE-AC36-08GO28308 Integrating Variable...

190

Weather Noise Forcing of Surface Climate Variability  

Science Conference Proceedings (OSTI)

A model-based method to evaluate the role of weather noise forcing of low-frequency variability of surface properties, including SST, surface currents, land surface temperature, and soil moisture, is presented. In this procedure, an “interactive ...

Edwin K. Schneider; Meizhu Fan

2007-09-01T23:59:59.000Z

191

Experiments Concerning Variability among Subjective Analyses  

Science Conference Proceedings (OSTI)

The variability of subjective (hand) analyses is explored by examining the results of two synoptic laboratory experiments. Two groups of analysts participated in the first experiment, one consisting of 13 senior meteorology students (1977), the ...

Dayton G. Vincent; Herbert Borenstein

1980-10-01T23:59:59.000Z

192

Variable volume architecture : expanding the boundary  

E-Print Network (OSTI)

Research into the creation of a Variable Volume Architecture is explored through a series of proposals and projects. An argument is established to develop the means and methods of achieving an architecture of transformation. ...

Saheba, Asheshh (Asheshh Mohit), 1972-

2001-01-01T23:59:59.000Z

193

Backscatter Differential Phase—Estimation and Variability  

Science Conference Proceedings (OSTI)

On the basis of simulations and observations made with polarimetric radars operating at X, C, and S bands, the backscatter differential phase ? has been explored; ? has been identified as an important polarimetric variable that should not be ...

Silke Trömel; Matthew R. Kumjian; Alexander V. Ryzhkov; Clemens Simmer; Malte Diederich

2013-11-01T23:59:59.000Z

194

Tropical Convective Variability as 1/f Noise  

Science Conference Proceedings (OSTI)

Evidence is presented that the tropical convective variability behaves as 1/f noise for a 1–30-day period. This behavior is shown by analyzing the time series of convective available potential energy, which measures the degree of convective ...

Jun-Ichi Yano; Klaus Fraedrich; Richard Blender

2001-09-01T23:59:59.000Z

195

Spatial Variability of Outgoing Longwave Radiation  

Science Conference Proceedings (OSTI)

Data from the Earth Radiation Budget Experiment scanning radiometer aboard the NOAA-9 operational meteorological satellite are used to investigate the spatial variability of outgoing longwave radiation (OLR). Daily and monthly radiation maps at ...

G. Louis Smith; David Rutan

1994-07-01T23:59:59.000Z

196

Climate Variability and Sugarcane Yield in Louisiana  

Science Conference Proceedings (OSTI)

This paper seeks to understand the role that climate variability has on annual yield of sugarcane in Louisiana. Unique features of sugarcane growth in Louisiana and nonclimatic, yield-influencing factors make this goal an interesting and ...

David Greenland

2005-11-01T23:59:59.000Z

197

Optimizing Crop Insurance under Climate Variability  

Science Conference Proceedings (OSTI)

This paper studies the selection of optimal crop insurance under climate variability and fluctuating market prices. A model was designed to minimize farmers’ expected losses (including insurance costs) while using the conditional-value-at-risk ...

Juan Liu; Chunhua Men; Victor E. Cabrera; Stan Uryasev; Clyde W. Fraisse

2008-10-01T23:59:59.000Z

198

Process Maps  

Science Conference Proceedings (OSTI)

...to the chief measure of the power-dissipation capacity of the material, the dimensionless parameter called the efficiency of power dissipation, η: (Eq 57) Deformation processing should be focused on the regions of maximum efficiency of power dissipation unless structural instabilities, for example,...

199

Improvement of efficiency in generating random $U(1)$ variables with Boltzmann distribution  

E-Print Network (OSTI)

A method for generating random $U(1)$ variables with Boltzmann distribution is presented. It is based on the rejection method with transformation of variables. High efficiency is achieved for all range of temparatures or coupling parameters, which makes the present method especially suitable for parallel and pipeline vector processing machines. Results of computer runs are presented to illustrate the efficiency. An idea to find such algorithms is also presented, which may be applicable to other distributions of interest in Monte Carlo simulations.

Tetsuya Hattori; Hideo Nakajima

1992-10-10T23:59:59.000Z

200

Variable temperature electrochemical strain microscopy of Sm-doped ceria  

Science Conference Proceedings (OSTI)

Variable temperature electrochemical strain microscopy has been used to study the electrochemical activity of Sm-doped ceria as a function of temperature and bias. The electrochemical strain microscopy hysteresis loops have been collected across the surface at different temperatures and the relative activity at different temperatures has been compared. The relaxation behavior of the signal at different temperatures has been also evaluated to relate kinetic process during bias induced electrochemical reactions with temperature and two different kinetic regimes have been identified. The strongly non-monotonic dependence of relaxation behavior on temperature is interpreted as evidence for water-mediated mechanisms.

Jesse, Stephen [ORNL; Morozovska, A. N. [National Academy of Science of Ukraine, Kiev, Ukraine; Kalinin, Sergei V [ORNL; Eliseev, E. A. [National Academy of Science of Ukraine, Kiev, Ukraine; Yang, Nan [ORNL; Doria, Sandra [ORNL; Tebano, Antonello [ORNL

2013-01-01T23:59:59.000Z

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


201

RACORO aerosol data processing  

Science Conference Proceedings (OSTI)

The RACORO aerosol data (cloud condensation nuclei (CCN), condensation nuclei (CN) and aerosol size distributions) need further processing to be useful for model evaluation (e.g., GCM droplet nucleation parameterizations) and other investigations. These tasks include: (1) Identification and flagging of 'splash' contaminated Twin Otter aerosol data. (2) Calculation of actual supersaturation (SS) values in the two CCN columns flown on the Twin Otter. (3) Interpolation of CCN spectra from SGP and Twin Otter to 0.2% SS. (4) Process data for spatial variability studies. (5) Provide calculated light scattering from measured aerosol size distributions. Below we first briefly describe the measurements and then describe the results of several data processing tasks that which have been completed, paving the way for the scientific analyses for which the campaign was designed. The end result of this research will be several aerosol data sets which can be used to achieve some of the goals of the RACORO mission including the enhanced understanding of cloud-aerosol interactions and improved cloud simulations in climate models.

Elisabeth Andrews

2011-10-31T23:59:59.000Z

202

Process Deviation  

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

1 Exercise Course Implementation 10_0630 Page 1 of 8 1 Exercise Course Implementation 10_0630 Page 1 of 8 EOTA - Business Process Document Title: Exercise Course Implementation Document Number: ISDP-011 Rev. 10_0630 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: ISDP-002, Training Production Process Notify of Changes: ISD, ITT, MGT Referenced Document(s): ISDF-004 Design Document, ISDF-006 WBT Script Template, ISDF-007 Lesson Plan Template, ISDP-012, ILT Course Implementation, ISDF-008 ILT Student Feedback Survey, ISDF-010 After Action Report ISDP-011 Exercise Course Implementation 10_0630 Page 2 of 8 Revision History: Rev. Description of Change 10_0630 Initial Release ISDP-011 Exercise Course Implementation 10_0630 Page 3 of 8

203

Prediction of Syngas Compositions in Texaco Coal Gasification Process Using Robust Neural Estimator  

Science Conference Proceedings (OSTI)

A robust inferential estimator model based on improved dynamic principal component analysis (DPCA) and multiple neural networks (MNN) was proposed. Data for building non-linear models was re-sampled using DPCA algorithm to form a number of sets of training ...

Rong Guo; Weiwei Guo; Wei Wang

2008-12-01T23:59:59.000Z

204

Dirac equation in terms of hydrodynamic variables  

E-Print Network (OSTI)

The distributed system $\\mathcal{S}_D$ described by the Dirac equation is investigated simply as a dynamic system, i.e. without usage of quantum principles. The Dirac equation is described in terms of hydrodynamic variables: 4-flux $j^{i}$, pseudo-vector of the spin $S^{i}$, an action $\\hbar \\phi $ and a pseudo-scalar $\\kappa $. In the quasi-uniform approximation, when all transversal derivatives (orthogonal to the flux vector $j^i$) are small, the system $\\mathcal{S}_D$ turns to a statistical ensemble of classical concentrated systems $\\mathcal{S}_{dc}$. Under some conditions the classical system $\\mathcal{S}_{dc}$ describes a classical pointlike particle moving in a given electromagnetic field. In general, the world line of the particle is a helix, even if the electromagnetic field is absent. Both dynamic systems $\\mathcal{S}_D$ and $\\mathcal{S}_{dc}$ appear to be non-relativistic in the sense that the dynamic equations written in terms of hydrodynamic variables are not relativistically covariant with respect to them, although all dynamic variables are tensors or pseudo-tensors. They becomes relativistically covariant only after addition of a constant unit timelike vector $f^{i}$ which should be considered as a dynamic variable describing a space-time property. This "constant" variable arises instead of $\\gamma $-matrices which are removed by means of zero divizors in the course of the transformation to hydrodynamic variables. It is possible to separate out dynamic variables $\\kappa $, $\\kappa ^i$ responsible for quantum effects. It means that, setting $\\kappa ,\\kappa ^i\\equiv 0$, the dynamic system $\\mathcal{S}_D$ described by the Dirac equation turns to a statistical ensemble $\\mathcal{E}_{Dqu}$ of classical dynamic systems $\\mathcal{S}_{dc}$.

Yuri A. Rylov

2011-01-31T23:59:59.000Z

205

Hydropyrolysis process  

DOE Patents (OSTI)

An improved process for producing a methane-enriched gas wherein a hydrogen-deficient carbonaceous material is treated with a hydrogen-containing pyrolysis gas at an elevated temperature and pressure to produce a product gas mixture including methane, carbon monoxide and hydrogen. The improvement comprises passing the product gas mixture sequentially through a water-gas shift reaction zone and a gas separation zone to provide separate gas streams of methane and of a recycle gas comprising hydrogen, carbon monoxide and methane for recycle to the process. A controlled amount of steam also is provided which when combined with the recycle gas provides a pyrolysis gas for treatment of additional hydrogen-deficient carbonaceous material. The amount of steam used and the conditions within the water-gas shift reaction zone and gas separation zone are controlled to obtain a steady-state composition of pyrolysis gas which will comprise hydrogen as the principal constituent and a minor amount of carbon monoxide, steam and methane so that no external source of hydrogen is needed to supply the hydrogen requirements of the process. In accordance with a particularly preferred embodiment, conditions are controlled such that there also is produced a significant quantity of benzene as a valuable coproduct.

Ullman, Alan Z. (Northridge, CA); Silverman, Jacob (Woodland Hills, CA); Friedman, Joseph (Huntington Beach, CA)

1986-01-01T23:59:59.000Z

206

GEOCHEMICAL MODELING OF F AREA SEEPAGE BASIN COMPOSITION AND VARIABILITY  

SciTech Connect

From the 1950s through 1989, the F Area Seepage Basins at the Savannah River Site (SRS) received low level radioactive wastes resulting from processing nuclear materials. Discharges of process wastes to the F Area Seepage Basins followed by subsequent mixing processes within the basins and eventual infiltration into the subsurface resulted in contamination of the underlying vadose zone and downgradient groundwater. For simulating contaminant behavior and subsurface transport, a quantitative understanding of the interrelated discharge-mixing-infiltration system along with the resulting chemistry of fluids entering the subsurface is needed. An example of this need emerged as the F Area Seepage Basins was selected as a key case study demonstration site for the Advanced Simulation Capability for Environmental Management (ASCEM) Program. This modeling evaluation explored the importance of the wide variability in bulk wastewater chemistry as it propagated through the basins. The results are intended to generally improve and refine the conceptualization of infiltration of chemical wastes from seepage basins receiving variable waste streams and to specifically support the ASCEM case study model for the F Area Seepage Basins. Specific goals of this work included: (1) develop a technically-based 'charge-balanced' nominal source term chemistry for water infiltrating into the subsurface during basin operations, (2) estimate the nature of short term and long term variability in infiltrating water to support scenario development for uncertainty quantification (i.e., UQ analysis), (3) identify key geochemical factors that control overall basin water chemistry and the projected variability/stability, and (4) link wastewater chemistry to the subsurface based on monitoring well data. Results from this study provide data and understanding that can be used in further modeling efforts of the F Area groundwater plume. As identified in this study, key geochemical factors affecting basin chemistry and variability included: (1) the nature or chemistry of the waste streams, (2) the open system of the basins, and (3) duration of discharge of the waste stream types. Mixing models of the archetype waste streams indicated that the overall basin system would likely remain acidic much of the time. Only an extended periods of predominantly alkaline waste discharge (e.g., >70% alkaline waste) would dramatically alter the average pH of wastewater entering the basins. Short term and long term variability were evaluated by performing multiple stepwise modeling runs to calculate the oscillation of bulk chemistry in the basins in response to short term variations in waste stream chemistry. Short term (1/2 month and 1 month) oscillations in the waste stream types only affected the chemistry in Basin 1; little variation was observed in Basin 2 and 3. As the largest basin, Basin 3 is considered the primary source to the groundwater. Modeling showed that the fluctuation in chemistry of the waste streams is not directly representative of the source term to the groundwater (i.e. Basin 3). The sequence of receiving basins and the large volume of water in Basin 3 'smooth' or nullify the short term variability in waste stream composition. As part of this study, a technically-based 'charge-balanced' nominal source term chemistry was developed for Basin 3 for a narrow range of pH (2.7 to 3.4). An example is also provided of how these data could be used to quantify uncertainty over the long term variations in waste stream chemistry and hence, Basin 3 chemistry.

Millings, M.; Denham, M.; Looney, B.

2012-05-08T23:59:59.000Z

207

Demand Response and Variable Generation Integration Scoping Study  

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

The Impact of City-level Permitting The Impact of City-level Permitting Processes on Residential PV Installation Prices and Development Times An Empirical Analysis of Solar Systems in California Cities Ryan Wiser and CG Dong Lawrence Berkeley National Laboratory April 2013 This analysis was funded by the Solar Energy Technologies Office, Office of Energy Efficiency and Renewable Energy of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 Energy Analysis Department  Electricity Markets and Policy Group Presentation Overview * Questions and Objective * Literature Review * Data Sources and Processing * Variable Description and Summary * Regression Analysis Results * Interpretation and Predictions * Conclusions * Possible Future Extensions 2 Energy Analysis Department  Electricity Markets and Policy Group

208

On Robust Estimation of Low-Frequency Variability Trends in Discrete Markovian Sequences of Atmospheric Circulation Patterns  

Science Conference Proceedings (OSTI)

Identification and analysis of temporal trends and low-frequency variability in discrete time series is an important practical topic in the understanding and prediction of many atmospheric processes, for example, in analysis of climate change. ...

Illia Horenko

2009-07-01T23:59:59.000Z

209

Control of Decadal and Bidecadal Climate Variability in the Tropical Pacific by the Off-Equatorial South Pacific Ocean  

Science Conference Proceedings (OSTI)

Delayed negative feedback processes determining intrinsic decadal and bidecadal time scales for the tropical variability in the Pacific are investigated based on climate model experiments. By comparing a control run driven by preindustrial forcing ...

Hiroaki Tatebe; Yukiko Imada; Masato Mori; Masahide Kimoto; Hiroyasu Hasumi

2013-09-01T23:59:59.000Z

210

Variables et categories grammaticales dans un modele ariane  

Science Conference Proceedings (OSTI)

Toutes tes catégories grammaticales utilisées dans un modéle de traduction ariane sont formalisées et codées de faç mnémonique en tant que variables et valeurs de variables. L'ensemble des variables d'un ...

Jean-Phillippe Guilbaud

1986-08-01T23:59:59.000Z

211

U.S. Economic Sensitivity to Weather Variability  

Science Conference Proceedings (OSTI)

To estimate the economic effects of weather variability in the United States, the authors define and measure weather sensitivity as the variability in economic output that is attributable to weather variability, accounting for changes in technology and ...

Jeffrey K. Lazo; Megan Lawson; Peter H. Larsen; Donald M. Waldman

2011-06-01T23:59:59.000Z

212

Reversible Record Breaking and Variability: Temperature Distributions across the Globe  

Science Conference Proceedings (OSTI)

Based on counts of record highs and lows, and employing reversibility in time, an approach to examining natural variability is proposed. The focus is on intrinsic variability; that is, variance separated from the trend in the mean. A variability ...

Amalia Anderson; Alexander Kostinski

2010-08-01T23:59:59.000Z

213

Integrating Variable Renewable Energy: Challenges and Solutions  

SciTech Connect

In the U.S., a number of utilities are adopting higher penetrations of renewables, driven in part by state policies. While power systems have been designed to handle the variable nature of loads, the additional supply-side variability and uncertainty can pose new challenges for utilities and system operators. However, a variety of operational and technical solutions exist to help integrate higher penetrations of wind and solar generation. This paper explores renewable energy integration challenges and mitigation strategies that have been implemented in the U.S. and internationally, including forecasting, demand response, flexible generation, larger balancing areas or balancing area cooperation, and operational practices such as fast scheduling and dispatch.

Bird, L.; Milligan, M.; Lew, D.

2013-09-01T23:59:59.000Z

214

Variable pressure power cycle and control system  

DOE Patents (OSTI)

A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

Goldsberry, Fred L. (Spring, TX)

1984-11-27T23:59:59.000Z

215

Adaptive variable structure control law for a variable speed wind turbine  

Science Conference Proceedings (OSTI)

The efficiency of the wind power conversions systems can be greatly improved using an appropriate control algorithm. In this work, an adaptive robust control for a doubly feed induction generator drive for variable speed wind power generation is described. ... Keywords: modeling and simulation, variable structure control, wind turbine control

Oscar Barambones; Jose Maria Gonzalez De Durana; Patxi Alkorta; Jose Antonio Ramos; Manuel De La Sen

2011-05-01T23:59:59.000Z

216

Crystallization process  

DOE Patents (OSTI)

An improved crystallization process is disclosed for separating a crystallizable material and an excluded material which is at least partially excluded from the solid phase of the crystallizable material obtained upon freezing a liquid phase of the materials. The solid phase is more dense than the liquid phase, and it is separated therefrom by relative movement with the formation of a packed bed of solid phase. The packed bed is continuously formed adjacent its lower end and passed from the liquid phase into a countercurrent flow of backwash liquid. The packed bed extends through the level of the backwash liquid to provide a drained bed of solid phase adjacent its upper end which is melted by a condensing vapor.

Adler, Robert J. (Shaker Heights, OH); Brown, William R. (Brecksville, OH); Auyang, Lun (Highland Heights, OH); Liu, Yin-Chang (Richmond Heights, OH); Cook, W. Jeffrey (Cleveland Heights, OH)

1986-01-01T23:59:59.000Z

217

WELDING PROCESS  

DOE Patents (OSTI)

A method of joining metal parts for the preparation of relatively long, thin fuel element cores of uranium or alloys thereof for nuclear reactors is described. The process includes the steps of cleaning the surfaces to be jointed, placing the sunfaces together, and providing between and in contact with them, a layer of a compound in finely divided form that is decomposable to metal by heat. The fuel element members are then heated at the contact zone and maintained under pressure during the heating to decompose the compound to metal and sinter the members and reduced metal together producing a weld. The preferred class of decomposable compounds are the metal hydrides such as uranium hydride, which release hydrogen thus providing a reducing atmosphere in the vicinity of the welding operation.

Zambrow, J.; Hausner, H.

1957-09-24T23:59:59.000Z

218

Oligomerization process  

DOE Patents (OSTI)

A liquid phase process is described for oligomerization of C[sub 4] and C[sub 5] isoolefins or the etherification thereof with C[sub 1] to C[sub 6] alcohols wherein the reactants are contacted in a reactor with a fixed bed acid cation exchange resin catalyst at an LHSV of 5 to 20, pressure of 0 to 400 psig and temperature of 120 to 300 F wherein the improvement is the operation of the reactor at a pressure to maintain the reaction mixture at its boiling point whereby at least a portion but less than all of the reaction mixture is vaporized. By operating at the boiling point and allowing a portion of the reaction mixture to vaporize, the exothermic heat of reaction is dissipated by the formation of more boil up and the temperature in the reactor is controlled. 2 figures.

Smith, L.A. Jr.; Hearn, D.; Jones, E.M. Jr.

1991-03-26T23:59:59.000Z

219

2005 RECS Variable Response Code Labels - U.S. Energy ...  

U.S. Energy Information Administration (EIA)

7 concrete or concrete block 8 glass 9 other 10 indescribable : 1 . 2005 recs variable response code labels . variable response code label file number* cnfrmhuq .

220

Flight Control Design for Rotorcraft with Variable Rotor Speed.  

E-Print Network (OSTI)

??Flight control design issues for rotorcraft with variable rotor speed are investigated, and new design methodologies are developed to deal with the challenges of variable… (more)

Guo, Wei

2009-01-01T23:59:59.000Z

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


221

Adaptation to Climate Variability and Change: A Guidance Manual...  

Open Energy Info (EERE)

Adaptation to Climate Variability and Change: A Guidance Manual for Development Planning Jump to: navigation, search Tool Summary Name: Adaptation to Climate Variability and...

222

Interannual Variability of Indian Ocean Heat Transport  

Science Conference Proceedings (OSTI)

The work in this paper builds upon the relatively well-studied seasonal cycle of the Indian Ocean heat transport by investigating its interannual variability over a 41-yr period (1958–98). An intermediate, two-and-a-half-layer thermodynamically ...

Galina Chirokova; Peter J. Webster

2006-03-01T23:59:59.000Z

223

Cloud service selection based on variability modeling  

Science Conference Proceedings (OSTI)

The selection among Cloud services is a recent problem in research and practice. The diversity of decision-relevant criteria, configurability of Cloud services and the need to involve human decision-makers require holistic support through models, methodologies ... Keywords: cloud service selection, decision-making, feature modeling, variability modeling

Erik Wittern; Jörn Kuhlenkamp; Michael Menzel

2012-11-01T23:59:59.000Z

224

Mesoscale Time and Space Wind Variability  

Science Conference Proceedings (OSTI)

The results of a program to study the time and space variability of the wind field below 5 km are presented. Wind data were collected using pilot balloons tracked with the METRAC positioning system. Balloons were launched at 10-30 min intervals ...

W. H. Jasperson

1982-06-01T23:59:59.000Z

225

Variables optimization of building air conditioning system  

Science Conference Proceedings (OSTI)

A heating and climatizer system based on selective absorption of solar energy by a selective collector. The experimental study shows that the performance of this system depends on several variables: the nature of the colporteur fluid, the flow of the ... Keywords: heating and climatisation, modelation and optimization, solar energy

Marius-Constantin Popescu; Cornelia Aida Bulucea; Gheorghe Manolea; Cristian Vladu

2009-10-01T23:59:59.000Z

226

The Interannual Variability of Tropical Cyclones  

Science Conference Proceedings (OSTI)

This paper examines the interannual variability of tropical cyclones in each of the earth’s cyclone basins using data from 1985 to 2003. The data are first analyzed using a Monte Carlo technique to investigate the long-standing myth that the ...

William M. Frank; George S. Young

2007-10-01T23:59:59.000Z

227

Variation of Area Variables in Regge Calculus  

E-Print Network (OSTI)

We consider the possibility to use the areas of two-simplexes, instead of lengths of edges, as the dynamical variables of Regge calculus. We show that if the action of Regge calculus is varied with respect to the areas of two-simplexes, and appropriate constraints are imposed between the variations, the Einstein-Regge equations are recovered.

Jarmo Makela

1998-01-09T23:59:59.000Z

228

A strain gage?variable area flowmeter  

Science Conference Proceedings (OSTI)

This article presents a unique hybrid flowmeter that combines the turndown ratio/low resistance benefits of a variable area differential pressure flowmeter with the low component simplicity of a target flowmeter. The design attaches a single element strain gage to the flexural membrane suspended in a fluid flow passage

D. W. Guillaume; D. DeVries

1990-01-01T23:59:59.000Z

229

10 X-rays from Cataclysmic Variables  

E-Print Network (OSTI)

Cataclysmic Variables ? (CVs) are a distinct class of interacting binaries, transferring mass from a donor star to a degenerate accretor, a white dwarf (WD). In all observational determinations, and as is required by theory for stable mass transfer, the donor star is of lower mass than the accretor.

Erik Kuulkers; Andrew Norton; Axel Schwope; Brian Warner

2003-01-01T23:59:59.000Z

230

Anatomy of North Pacific Decadal Variability  

Science Conference Proceedings (OSTI)

A systematic analysis of North Pacific decadal variability in a full-physics coupled ocean–atmosphere model is executed. The model is an updated and improved version of the coupled model studied by Latif and Barnett. Evidence is sought for ...

Niklas Schneider; Arthur J. Miller; David W. Pierce

2002-03-01T23:59:59.000Z

231

Galactic Variable Sky with EGRET and GLAST  

Science Conference Proceedings (OSTI)

The characteristics of the largely-unidentified Galactic sources of gamma rays that were detected by EGRET are reviewed. Proposed source populations that may have the correct spatial, spectral, luminosity, and variability properties to be the origins of the EGRET sources are also presented. Finally, the prospects for studying Galactic gamma-ray sources with the GLAST LAT are reviewed.

Digel, S.W.; /SLAC

2006-11-28T23:59:59.000Z

232

Investigation of determinism in heart rate variability  

Science Conference Proceedings (OSTI)

The article searches for the possible presence of determinism in heart rate variability (HRV) signals by using a new approach based on NARMA (nonlinear autoregressive moving average) modeling and free-run prediction. Thirty-three 256-point HRV time series obtained from Wistar rats submitted to different autonomic blockade protocols are considered

M. E. D. Gomes; A. V. P. Souza; H. N. Guimarăes; L. A. Aguirre

2000-01-01T23:59:59.000Z

233

TRANSIENT QUANTUM MECHANICAL PROCESSES  

SciTech Connect

Our principal objective has centered on the development of sophisticated computational techniques to solve the time-dependent Schroedinger equation that governs the evolution of quantum mechanical systems. We have perfected two complementary methods, discrete variable representation and real space product formula, that show great promise in solving these complicated temporal problems. We have applied these methods to the interaction of laser light with molecules with the intent of not only investigating the basic mechanisms but also devising schemes for actually controlling the outcome of microscopic processes. Lasers now exist that produce pulses of such short duration as to probe a molecular process many times within its characteristic period--allowing the actual observation of an evolving quantum mechanical system. We have studied the potassium dimer as an example and found agreement with experimental changes in the intermediate state populations as a function of laser frequency--a simple control prescription. We have also employed elaborate quantum chemistry programs to improve the accuracy of basic input such as bound-bound and bound-free coupling moments. These techniques have far-ranging applicability; for example, to trapped quantum systems at very low temperatures such as Bose-Einstein condensates.

L. COLLINS; J. KRESS; R. WALKER

1999-07-01T23:59:59.000Z

234

Sources of Technical Variability in Quantitative LC-MS Proteomics: Human Brain Tissue Sample Analysis.  

SciTech Connect

To design a robust quantitative proteomics study, an understanding of both the inherent heterogeneity of the biological samples being studied as well as the technical variability of the proteomics methods and platform is needed. Additionally, accurately identifying the technical steps associated with the largest variability would provide valuable information for the improvement and design of future processing pipelines. We present an experimental strategy that allows for a detailed examination of the variability of the quantitative LC-MS proteomics measurements. By replicating analyses at different stages of processing, various technical components can be estimated and their individual contribution to technical variability can be dissected. This design can be easily adapted to other quantitative proteomics pipelines. Herein, we applied this methodology to our label-free workflow for the processing of human brain tissue. For this application, the pipeline was divided into four critical components: Tissue dissection and homogenization (extraction), protein denaturation followed by trypsin digestion and SPE clean-up (digestion), short-term run-to-run instrumental response fluctuation (instrumental variance), and long-term drift of the quantitative response of the LC-MS/MS platform over the 2 week period of continuous analysis (instrumental stability). From this analysis, we found the following contributions to variability: extraction (72%) >> instrumental variance (16%) > instrumental stability (8.4%) > digestion (3.1%). Furthermore, the stability of the platform and its’ suitability for discovery proteomics studies is demonstrated.

Piehowski, Paul D.; Petyuk, Vladislav A.; Orton, Daniel J.; Xie, Fang; Moore, Ronald J.; Ramirez Restrepo, Manuel; Engel, Anzhelika; Lieberman, Andrew P.; Albin, Roger L.; Camp, David G.; Smith, Richard D.; Myers, Amanda J.

2013-05-03T23:59:59.000Z

235

Assessing Corn Stover Composition and Sources of Variability via NIRS  

Science Conference Proceedings (OSTI)

Corn stover, the above-ground, non-grain portion of the crop, is a large, currently available source of biomass that potentially could be collected as a biofuels feedstock. Biomass conversion process economics are directly affected by the overall biochemical conversion yield, which is assumed to be proportional to the carbohydrate content of the feedstock materials used in the process. Variability in the feedstock carbohydrate levels affects the maximum theoretical biofuels yield and may influence the optimum pretreatment or saccharification conditions. The aim of this study is to assess the extent to which commercial hybrid corn stover composition varies and begin to partition the variation among genetic, environmental, or annual influences. A rapid compositional analysis method using near-infrared spectroscopy/partial least squares multivariate modeling (NIR/PLS) was used to evaluate compositional variation among 508 commercial hybrid corn stover samples collected from 47 sites in eight Corn Belt states after the 2001, 2002, and 2003 harvests. The major components of the corn stover, reported as average (standard deviation) % dry weight, whole biomass basis, were glucan 31.9 (2.0), xylan 18.9 (1.3), solubles composite 17.9 (4.1), and lignin (corrected for protein) 13.3 (1.1). We observed wide variability in the major corn stover components. Much of the variation observed in the structural components (on a whole biomass basis) is due to the large variation found in the soluble components. Analysis of variance (ANOVA) showed that the harvest year had the strongest effect on corn stover compositional variation, followed by location and then variety. The NIR/PLS rapid analysis method used here is well suited to testing large numbers of samples, as tested in this study, and will support feedstock improvement and biofuels process research.

Templeton, D. W.; Sluiter, A. D.; Hayward, T. K.; Hames, B. R.; Thomas, S. R.

2009-01-01T23:59:59.000Z

236

CHARACTERIZING THE OPTICAL VARIABILITY OF BRIGHT BLAZARS: VARIABILITY-BASED SELECTION OF FERMI ACTIVE GALACTIC NUCLEI  

SciTech Connect

We investigate the use of optical photometric variability to select and identify blazars in large-scale time-domain surveys, in part to aid in the identification of blazar counterparts to the {approx}30% of {gamma}-ray sources in the Fermi 2FGL catalog still lacking reliable associations. Using data from the optical LINEAR asteroid survey, we characterize the optical variability of blazars by fitting a damped random walk model to individual light curves with two main model parameters, the characteristic timescales of variability {tau}, and driving amplitudes on short timescales {sigma}-circumflex. Imposing cuts on minimum {tau} and {sigma}-circumflex allows for blazar selection with high efficiency E and completeness C. To test the efficacy of this approach, we apply this method to optically variable LINEAR objects that fall within the several-arcminute error ellipses of {gamma}-ray sources in the Fermi 2FGL catalog. Despite the extreme stellar contamination at the shallow depth of the LINEAR survey, we are able to recover previously associated optical counterparts to Fermi active galactic nuclei with E {>=} 88% and C = 88% in Fermi 95% confidence error ellipses having semimajor axis r < 8'. We find that the suggested radio counterpart to Fermi source 2FGL J1649.6+5238 has optical variability consistent with other {gamma}-ray blazars and is likely to be the {gamma}-ray source. Our results suggest that the variability of the non-thermal jet emission in blazars is stochastic in nature, with unique variability properties due to the effects of relativistic beaming. After correcting for beaming, we estimate that the characteristic timescale of blazar variability is {approx}3 years in the rest frame of the jet, in contrast with the {approx}320 day disk flux timescale observed in quasars. The variability-based selection method presented will be useful for blazar identification in time-domain optical surveys and is also a probe of jet physics.

Ruan, John J.; Anderson, Scott F.; MacLeod, Chelsea L.; Becker, Andrew C.; Davenport, James R. A.; Ivezic, Zeljko [Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 (United States); Burnett, T. H. [Department of Physics, University of Washington, Seattle, WA 98195-1560 (United States); Kochanek, Christopher S. [Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States); Plotkin, Richard M. [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States); Sesar, Branimir [Division of Physics, Mathematics and Astronomy, Caltech, Pasadena, CA 91125 (United States); Stuart, J. Scott, E-mail: jruan@astro.washington.edu [Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, MA 02420-9108 (United States)

2012-11-20T23:59:59.000Z

237

A Bayesian decision theory approach to variable selection for discrimination  

Science Conference Proceedings (OSTI)

Motivated by examples in spectroscopy, we study variable selection for discrimination in problems with very many predictor variables. Assuming multivariate normal distributions with common variance for the predictor variables within groups, we develop ... Keywords: Bayes, decision theory, discriminant analysis, near infrared spectroscopy, simulated annealing, variable selection

T. Fearn; P. J. Brown; P. Besbeas

2002-07-01T23:59:59.000Z

238

Variable selection and ranking for analyzing automobile traffic accident data  

Science Conference Proceedings (OSTI)

Variable ranking and feature selection are important concepts in data mining and machine learning. This paper introduces a new variable ranking technique named Sum Max Gain Ratio (SMGR). The new technique is evaluated within the domain of traffic accident ... Keywords: decision tree, traffic accident data, variable and feature selection, variable ranking

Huanjing Wang; Allen Parrish; Randy K. Smith; Susan Vrbsky

2005-03-01T23:59:59.000Z

239

Processing data base information having nonwhite noise  

DOE Patents (OSTI)

A method and system for processing a set of data from an industrial process and/or a sensor. The method and system can include processing data from either real or calculated data related to an industrial process variable. One of the data sets can be an artificial signal data set generated by an autoregressive moving average technique. After obtaining two data sets associated with one physical variable, a difference function data set is obtained by determining the arithmetic difference between the two pairs of data sets over time. A frequency domain transformation is made of the difference function data set to obtain Fourier modes describing a composite function data set. A residual function data set is obtained by subtracting the composite function data set from the difference function data set and the residual function data set (free of nonwhite noise) is analyzed by a statistical probability ratio test to provide a validated data base.

Gross, Kenneth C. (Bolingbrook, IL); Morreale, Patricia (Park Ridge, IL)

1995-01-01T23:59:59.000Z

240

Temporal and spatial variability of surface temperature over Texas  

E-Print Network (OSTI)

Surface temperature is one of the most fundamental aspects of the climate system, and its study has been the focus of extensive research in the field of climatology for years. Examination of its temporal and spatial fluctuations can provide scientists with information on the behavior of the atmospheric circulation. Many researchers have also been interested in the physical processes and mechanisms at work in producing the observed distribution of the surface temperature field over the globe. Various analytical methods are used in the study of temperature variability on the Earth. White and Wallace (1978) documented the annual march of surface temperature by mapping amplitudes and phases of the seasonal cycle. The latter were obtained through Fourier analysis of the data. Kim and North (1991, 1992) routinely use second-moment statistics such as variance and spatial correlation to study the fluctuations of temperature in energy balance models as compared with observations. Empirical orthogonal function (EOF) analysis has become a popular and convenient method for representing the variability of climatic parameters since the groundbreaking work of Lorenz (1956). The first several EOFS, or patterns of covariability in a meteorological field, can sometimes be explained in a physical sense based on their shapes. While most previous efforts have concentrated on the global or hemispheric scale, this research examines the fluctuations of surface temperature on a regional scale, namely the state of Texas. Texas is an ideal location for a study of this type due to its vast areal extent, diverse topography, and expanse across different climatic regimes. Some of the methods used in the study of temperature variability are applied to the state of Texas.

Moninski, Anthony David

1995-01-01T23:59:59.000Z

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


241

Variables Affecting Economic Development of Wind Energy  

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

Variables Affecting Economic Variables Affecting Economic Development of Wind Energy E. Lantz and S. Tegen National Renewable Energy Laboratory Presented at WINDPOWER 2008 Houston, Texas June 1-4, 2008 Conference Paper NREL/CP-500-43506 July 2008 NREL is operated by Midwest Research Institute â—Ź Battelle Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

242

Thermodynamics in variable speed of light theories  

SciTech Connect

The perfect fluid in the context of a covariant variable speed of light theory proposed by J. Magueijo is studied. On the one hand the modified first law of thermodynamics together with a recipe to obtain equations of state are obtained. On the other hand the Newtonian limit is performed to obtain the nonrelativistic hydrostatic equilibrium equation for the theory. The results obtained are used to determine the time variation of the radius of Mercury induced by the variability of the speed of light (c), and the scalar contribution to the luminosity of white dwarfs. Using a bound for the change of that radius and combining it with an upper limit for the variation of the fine structure constant, a bound on the time variation of c is set. An independent bound is obtained from luminosity estimates for Stein 2015B.

Racker, Juan [CONICET, Centro Atomico Bariloche, Avenida Bustillo 9500 (8400), San Carlos De Bariloche (Argentina); Facultad de Ciencias Astronomicas y Geofisicas, Universidad Nacional de La Plata, Paseo del Bosque S/N (1900), La Plata (Argentina); Sisterna, Pablo [Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350 (7600), Mar del Plata (Argentina); Vucetich, Hector [Facultad de Ciencias Astronomicas y Geofisicas, Universidad Nacional de La Plata, Paseo del Bosque S/N (1900), La Plata (Argentina)

2009-10-15T23:59:59.000Z

243

Solar energy: some variables influencing increased utilization  

SciTech Connect

The mid 1970s energy crisis encouraged the growth of alternative fuels. Through the late 1970s and 1980s, solar energy was the primary alternative fuel. Federal and state programs encouraged the growth of residential solar installations through the use of tax credits. This dissertation used data from the eleven western states to assess tax credits' influence on residential solar installations. A Spearman's r was used to evaluate the role of tax credits on the percent increase in solar systems from 1980 to 1984. The r/sub s/ was .93. The second portion of the analysis used contingency tables to see if variables other than tax credits influence solar installations; the results showed tax credits + solar radiation and fuel mix are the significant variables. The final chapter looks at municipal solar utilities, tax on excessive energy use, a public/private solar research lab, and building rating system as means to supplement solar energy tax credits.

Born, B.E.

1986-01-01T23:59:59.000Z

244

Thermodynamics in variable speed of light theories  

E-Print Network (OSTI)

The perfect fluid in the context of a covariant variable speed of light theory proposed by J. Magueijo is studied. On the one hand the modified first law of thermodynamics together with a recipe to obtain equations of state are obtained. On the other hand the Newtonian limit is performed to obtain the nonrelativistic hydrostatic equilibrium equation for the theory. The results obtained are used to determine the time variation of the radius of Mercury induced by the variability of the speed of light ($c$), and the scalar contribution to the luminosity of white dwarfs. Using a bound for the change of that radius and combining it with an upper limit for the variation of the fine structure constant, a bound on the time variation of $c$ is set. An independent bound is obtained from luminosity estimates for Stein 2015B.

Juan Racker; Pablo Sisterna; Hector Vucetich

2007-11-06T23:59:59.000Z

245

Review of Variable Generation Integration Charges  

DOE Green Energy (OSTI)

The growth of wind and solar generation in the United States, and the expectation of continued growth of these technologies, dictates that the future power system will be operated in a somewhat different manner because of increased variability and uncertainty. A small number of balancing authorities have attempted to determine an 'integration cost' to account for these changes to their current operating practices. Some balancing authorities directly charge wind and solar generators for integration charges, whereas others add integration charges to projected costs of wind and solar in integrated resource plans or in competitive solicitations for generation. This report reviews the balancing authorities that have calculated variable generation integration charges and broadly compares and contrasts the methodologies they used to determine their specific integration charges. The report also profiles each balancing authority and how they derived wind and solar integration charges.

Porter, K.; Fink, S.; Buckley, M.; Rogers, J.; Hodge, B. M.

2013-03-01T23:59:59.000Z

246

A population-based variable neighborhood search for the single machine total weighted tardiness problem  

Science Conference Proceedings (OSTI)

This paper investigates the single machine total weighted tardiness problem, in which a set of independent jobs with distinct processing times, weights, and due dates are to be scheduled on a single machine to minimize the sum of weighted tardiness of ... Keywords: Single machine scheduling, Total weighted tardiness, Variable neighborhood search

Xianpeng Wang; Lixin Tang

2009-06-01T23:59:59.000Z

247

Measure Guideline: Replacing Single-Speed Pool Pumps with Variable Speed Pumps for Energy Savings  

Science Conference Proceedings (OSTI)

The report evaluates potential energy savings by replacing traditional single-speed pool pumps with variable speed pool pumps, and provide a basic cost comparison between continued uses of traditional pumps verses new pumps. A simple step-by-step process for inspecting the pool area and installing a new pool pump follows.

Hunt, A.; Easley, S.

2012-05-01T23:59:59.000Z

248

Brief paper: Implementation of self-tuning regulators with variable forgetting factors  

Science Conference Proceedings (OSTI)

A modified version of the self-tuning regulator having limited adaptability has been successfully implemented on a large-scale chemical pilot plant. The new algorithm uses a least-squares estimator with variable weighting of past data; at each step a ... Keywords: Adaptive control, chemical industry, computer control, process control, stochastic control, time-varying systems

T. R. Fortescue; L. S. Kershenbaum; B. E. Ydstie

1981-11-01T23:59:59.000Z

249

Quantum optical coherence can survive photon losses using a continuous-variable quantum  

E-Print Network (OSTI)

Quantum optical coherence can survive photon losses using a continuous-variable quantum erasure,5 , Nicolas J. Cerf3 and Ulrik L. Andersen1 * A fundamental requirement for enabling fault-tolerant quantum information processing is an efficient quantum error-correcting code that robustly protects the involved

Cerf, Nicolas

250

CVcat: an interactive database on cataclysmic variables  

E-Print Network (OSTI)

CVcat is a database that contains published data on cataclysmic variables and related objects. Unlike in the existing online sources, the users are allowed to add data to the catalogue. The concept of an ``open catalogue'' approach is reviewed together with the experience from one year of public usage of CVcat. New concepts to be included in the upcoming AstroCat framework and the next CVcat implementation are presented. CVcat can be found at http://www.cvcat.org.

J. Kube; B. T. Gaensicke; F. Euchner; B. Hoffmann

2003-04-29T23:59:59.000Z

251

Mobile Variable Depth Sampling System Design Study  

Science Conference Proceedings (OSTI)

A design study is presented for a mobile, variable depth sampling system (MVDSS) that will support the treatment and immobilization of Hanford LAW and HLW. The sampler can be deployed in a 4-inch tank riser and has a design that is based on requirements identified in the Level 2 Specification (latest revision). The waste feed sequence for the MVDSS is based on Phase 1, Case 3S6 waste feed sequence. Technical information is also presented that supports the design study.

BOGER, R.M.

2000-08-25T23:59:59.000Z

252

Variability of PV on Distribution Systems  

Science Conference Proceedings (OSTI)

In 2010, the Electric Power Research Institute (EPRI) along with several utilities began collecting high-resolution monitoring data on distributed solar photovoltaic (PV) systems throughout the United States. Included in these monitoring data are single-module PV systems distributed along selected feeders as well as several larger PV systems (up to 1.4 MW). Utilizing data from these sites, this report focuses specifically on examining the measured variability of solar PV distributed throughout a ...

2012-12-13T23:59:59.000Z

253

Bessel-Zernike Discrete Variable Representation Basis  

SciTech Connect

The connection between the Bessel discrete variable basis expansion and a specific form of an orthogonal set of Jacobi polynomials is demonstrated. These so-called Zernike polynomials provide alternative series expansions of suitable functions over the unit interval. Expressing a Bessel function in a Zernike expansion provides a straightforward method of generating series identities. Furthermore, the Zernike polynomials may also be used to efficiently evaluate the Hankel transform for rapidly decaying functions or functions with finite support.

Cerjan, C J

2005-10-24T23:59:59.000Z

254

Changes in heart rate variability during fainting  

Science Conference Proceedings (OSTI)

Studies of heart rate variability in people who faint may yield insights into normal physiologic mechanisms which probably are dynamic. These insights might be gained because fainting appears to be due to a breakdown of these mechanisms. Tilt table testing reliably induces fainting in patients with a history of fainting and can be used to study these mechanisms. During tilt tests ending in fainting heart rate changes markedly

Robert Sheldon; Kenneth Riff

1991-01-01T23:59:59.000Z

255

A stochastic diffusion process for the Dirichlet distribution  

E-Print Network (OSTI)

The method of potential solutions of Fokker-Planck equations is used to develop a transport equation for the joint probability of N coupled stochastic variables with the Dirichlet distribution as its asymptotic solution. To ensure a bounded sample space, a coupled nonlinear diffusion process is required: the Wiener-processes in the equivalent system of stochastic differential equations are multiplicative with coefficients dependent on all the stochastic variables. Individual samples of a discrete ensemble, obtained from the stochastic process, satisfy a unit-sum constraint at all times. The process may be used to represent realizations of a fluctuating ensemble of N variables subject to a conservation principle. Similar to the multivariate Wright-Fisher process, whose invariant is also Dirichlet, the univariate case yields a process whose invariant is the beta distribution. As a test of the results, Monte-Carlo simulations are used to evolve numerical ensembles toward the invariant Dirichlet distribution.

Bakosi, J

2013-01-01T23:59:59.000Z

256

Ensemble Forecasts of Drought Indices Using a Conditional Residual Resampling Technique  

Science Conference Proceedings (OSTI)

The historical climate record and seasonal temperature and precipitation records provide useful datasets for making short-term drought predictions. A variety of methods have exploited these resources, but few have quantitatively measured ...

Yeonsang Hwang; Gregory J. Carbone

2009-07-01T23:59:59.000Z

257

Implementation of barycentric resampling for continuous wave searches in gravitational wave data  

SciTech Connect

We describe an efficient implementation of a coherent statistic for searches of continuous gravitational wave from neutron stars. The algorithm works by transforming the data taken by a gravitational wave detector from a moving Earth bound frame to one that sits at the Solar System barycenter. Many practical difficulties arise in the implementation of this algorithm, some of which have not been discussed previously. These difficulties include constraints of small computer memory, discreteness of the data, losses due to interpolation, and gaps in real data. This implementation is considerably more efficient than previous implementations of these kinds of searches on Laser Interferometer Gravitational Wave (LIGO) detector data. The speed-up factors range from 10, when applied to Einstein-Home, to about 2000 for targeted searches which integrate over months of data.

Patel, Pinkesh; Dupuis, Rejean; Betzwieser, Joseph [Department of Physics, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125 (United States); Siemens, Xavier [Department of Physics, University of Wisconsin--Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 (United States)

2010-04-15T23:59:59.000Z

258

Learning Optimal Threshold on Resampling Data to Deal with Class Imbalance  

E-Print Network (OSTI)

, such as credit card fraud detection, intrusion detection, oil-spill detection, disease diagnosis, and many other

Schmidt-Thieme, Lars

259

Design of a variable gain amplifier for an ultrawideband receiver  

E-Print Network (OSTI)

A fully differential CMOS variable gain amplifier (VGA) has been designed for an ultra-wideband receiver. The VGA comprises of two variable gain stages followed by a post amplifier stage. The interface between the digital control block and the analog VGA is formed by a digital-to-analog converter and an exponential voltage generator. The gain of the VGA varies dB-linearly from 0 to 52 dB with respect to the control voltage. The VGA is operated in open loop with a bandwidth greater than 500 MHz throughout the gain range to cater to the requirements of the ultra-wideband system. The noise-to-power ratio of the VGA is -23.9 dB for 1Vp-p differential input signal in the low gain setting, and the equivalent input referred noise is 1.01 V2 for the high gain setting. All three stages use common mode feedback to fix and stabilize the output DC levels at a particular voltage depending on the input common-mode requirement of the following stage. DC offset cancellation has also been incorporated to minimize the input referred DC offset caused by systematic and random mismatches in the circuit. Compensation schemes to minimize the effects of temperature, supply and process variations have been included in the design. The circuit has been designed in 0.18??m CMOS technology, and the post layout simulations are in good agreement with the schematic simulations.

Krishnanji, Sivasankari

2005-08-01T23:59:59.000Z

260

Search for Spatial Variability in the Solar Acoustic Spectrum  

E-Print Network (OSTI)

Motivated by the various examples of spatial variability in the power of the acoustic spectrum, we attempted to look for spatial variability in the peak frequency of the spectrum. However, the determination of this peak frequency on a spatial scale of a single pixel (8 arc seconds for the GONG data) is limited by the stochastic variations in the power spectrum presumably caused by the stochastic nature of the excitation process. Averaging over a large number of spectra (100 spectra from a 10 $\\times$ 10 pixels area) produced stabler spectra. The peak frequencies of 130 such locations were found to be distributed with a FWHM of about 130 $\\mu$Hz. A map of the spatial variation of this peak frequency did not show any strong feature with statistically significant deviation from the mean of the distribution. Likewise, the scatter in the peak frequencies masked the detection of magnetic field induced changes in the peak frequency. On a much larger scale, the N latitudes showed a slightly lower value of the peak frequency as compared to the S latitudes, although the difference (25 $\\mu$Hz) is barely larger than the {\\it rms} spread (20 $\\mu$Hz).

P. Venkatakrishnan; Brajesh Kumar; S. C. Tripathy

2001-05-22T23:59:59.000Z

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


261

SEARCH FOR SPATIAL VARIABILITY IN THE SOLAR ACOUSTIC SPECTRUM  

E-Print Network (OSTI)

Abstract. Motivated by the various examples of spatial variability in the power of the acoustic spectrum, we attempted to look for spatial variability in the peak frequency of the spectrum. However, the determination of this peak frequency on a spatial scale of a single pixel (8 arc seconds for the GONG data) is limited by the stochastic variations in the power spectrum presumably caused by the stochastic nature of the excitation process. Averaging over a large number of spectra (100 spectra from a 10 × 10 pixels area) produced stabler spectra. The peak frequencies of 130 such locations were found to be distributed with a FWHM of about 130 µHz. A map of the spatial variation of this peak frequency did not show any strong feature with statistically significant deviation from the mean of the distribution. Likewise, the scatter in the peak frequencies masked the detection of magnetic field induced changes in the peak frequency. On a much larger scale, the N latitudes showed a slightly lower value of the peak frequency as compared to the S latitudes, although the difference (25 µHz) is barely larger than the rms spread (20 µHz). 1.

P. Venkatakrishnan; Brajesh Kumar; S. C. Tripathy

2001-01-01T23:59:59.000Z

262

MASe UCRL-15037 CONTINUOUSLY VARIABLE TRANSMISSIONS: THEORY AND PRACTICE  

Office of Scientific and Technical Information (OSTI)

^ . S7l MASe UCRL-15037 CONTINUOUSLY VARIABLE TRANSMISSIONS: THEORY AND PRACTICE August 1979 Norman H. Beachley Andrew A. Frank College of Engineering University of Wisconsin, Madison n LAWRENCE UVERMORE LABORATORY vmrnm IP T H I S 8ocu«arr ii mmm NOTICE This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, or any of their employees, makes any warranty, expressed or implied, or assumes any legal Uability or responsibility for any third party's use, or the results of such use, of any information, ap- paratus, product or process disclosed in this report, or represents that its use by such third party would not infringe privately owned rights.

263

Construction processes configuration using process patterns  

Science Conference Proceedings (OSTI)

Process modeling is used in construction to support various simulation tasks. A major problem is that due to the one-of-a-kind character of construction projects a lot of work is needed each time to manually develop a project overall process schedule. ... Keywords: Ontology, Process configuration, Process modeling, Process pattern, Rules

A. Benevolenskiy; K. Roos; P. Katranuschkov; R. J. Scherer

2012-10-01T23:59:59.000Z

264

Long-Term Wind Power Variability  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory started collecting wind power data from large commercial wind power plants (WPPs) in southwest Minnesota with dedicated dataloggers and communication links in the spring of 2000. Over the years, additional WPPs in other areas were added to and removed from the data collection effort. The longest data stream of actual wind plant output is more than 10 years. The resulting data have been used to analyze wind power fluctuations, frequency distribution of changes, the effects of spatial diversity, and wind power ancillary services. This report uses the multi-year wind power data to examine long-term wind power variability.

Wan, Y. H.

2012-01-01T23:59:59.000Z

265

Allocating Variability and Reserve Requirements (Presentation)  

SciTech Connect

This presentation describes how you could conceivably allocate variability and reserve requirements, including how to allocate aggregation benefits. Conclusions of this presentation are: (1) Aggregation provides benefits because individual requirements are not 100% correlated; (2) Method needed to allocate reduced requirement among participants; (3) Differences between allocation results are subtle - (a) Not immediately obvious which method is 'better'; (b) Many are numerically 'correct', they sum to the physical requirement; (c) Many are not 'fair', Results depend on sub-aggregation and/or the order individuals are included; and (4) Vector allocation method is simple and fair.

Kirby, B.; King, J.; Milligan, M.

2011-10-01T23:59:59.000Z

266

Constraints on Area Variables in Regge Calculus  

E-Print Network (OSTI)

We describe a general method of obtaining the constraints between area variables in one approach to area Regge calculus, and illustrate it with a simple example. The simplicial complex is the simplest tessellation of the 4-sphere. The number of independent constraints on the variations of the triangle areas is shown to equal the difference between the numbers of triangles and edges, and a general method of choosing independent constraints is described. The constraints chosen by using our method are shown to imply the Regge equations of motion in our example.

Jarmo Makela; Ruth M. Williams

2000-11-02T23:59:59.000Z

267

Constraints on Area Variables in Regge Calculus  

E-Print Network (OSTI)

We describe a general method of obtaining the constraints between area variables in one approach to area Regge calculus, and illustrate it with a simple example. The simplicial complex is the simplest tessellation of the 4-sphere. The number of independent constraints on the variations of the triangle areas is shown to equal the difference between the numbers of triangles and edges, and a general method of choosing independent constraints is described. The constraints chosen by using our method are shown to imply the Regge equations of motion in our example.

Mäkelä, J M; Makela, Jarmo; Williams, Ruth M.

2001-01-01T23:59:59.000Z

268

Allocating Variability and Reserve Requirements (Presentation)  

DOE Green Energy (OSTI)

This presentation describes how you could conceivably allocate variability and reserve requirements, including how to allocate aggregation benefits. Conclusions of this presentation are: (1) Aggregation provides benefits because individual requirements are not 100% correlated; (2) Method needed to allocate reduced requirement among participants; (3) Differences between allocation results are subtle - (a) Not immediately obvious which method is 'better'; (b) Many are numerically 'correct', they sum to the physical requirement; (c) Many are not 'fair', Results depend on sub-aggregation and/or the order individuals are included; and (4) Vector allocation method is simple and fair.

Kirby, B.; King, J.; Milligan, M.

2011-10-01T23:59:59.000Z

269

Empowering Variable Renewables: Options for Flexible Electricity Systems |  

Open Energy Info (EERE)

Empowering Variable Renewables: Options for Flexible Electricity Systems Empowering Variable Renewables: Options for Flexible Electricity Systems Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Empowering Variable Renewables: Options for Flexible Electricity Systems Agency/Company /Organization: International Energy Agency Sector: Energy Focus Area: Renewable Energy Topics: Market analysis, Technology characterizations Resource Type: Publications Website: www.iea.org/g8/2008/Empowering_Variable_Renewables.pdf Empowering Variable Renewables: Options for Flexible Electricity Systems Screenshot References: Empowering Variable Renewables: Options for Flexible Electricity Systems[1] Summary "Increasing the share of renewables in energy portfolios is a key tool in the drive to reduce anthropogenic carbon dioxide emissions, as well as

270

Transactional process views  

Science Conference Proceedings (OSTI)

To enable effective interorganisational collaborations, process providers have to disclose relevant parts of their local business processes in public process views. A public process view has to be consistent with the underlying private process. Local ...

Rik Eshuis; Jochem Vonk; Paul Grefen

2011-10-01T23:59:59.000Z

271

The Use of Pressure and Strain as Processing Variables in Soft ...  

Science Conference Proceedings (OSTI)

... and large saturation induction, making them attractive materials for use in power ... Magnetic Materials for Use in Energy-efficient Distribution Transformers.

272

Interpretation of North Pacific Variability as a Short and Long Memory Process  

E-Print Network (OSTI)

(SNPs) provide standard DNA data for Bering/ Aleutian Salmon International Survey (BASIS) Studies. SNP

Washington at Seattle, University of

273

Reducing the cost of quality (COQ) through increased product reliability and reduced process variability  

E-Print Network (OSTI)

Today, Dell, Inc. (Dell) spends millions of dollars each year to prevent product defects from reaching the end customer and to manage those product defects that have escaped to the end customer. The cost of the equipment, ...

Schiveley, Steven C. (Steven Charles), 1974-

2004-01-01T23:59:59.000Z

274

Characterization of the Impact of Process Variables on the Densification of Corn Stover.  

E-Print Network (OSTI)

??The bulk density of corn stover poses a major obstruction to its large scale viability as a biomass feedstock. Corn stover has a low bulk… (more)

Thoreson, Curtis Peder

2011-01-01T23:59:59.000Z

275

Experimental studies on remanence acquisition processes and regional geomagnetic field variability from archeointensity studies  

E-Print Network (OSTI)

Nature of the geomagnetic field . . . . . . . . . . . . . .Nature of the geomagnetic field . . . . . . . . . . . . . .Walker. Four centuries of geomagnetic secular variation from

Mitra, Ritayan

2012-01-01T23:59:59.000Z

276

A Hybrid approach to molecular continuum processes combining Gaussian basis functions and the discrete variable representation  

E-Print Network (OSTI)

9], and most recently, B-spline [10, 11] examples, have beenwith compact support, such as B-splines [12] or DVR positionan ECS implementation using B-splines, in a ?rst-principles

Rescigno, Thomas N.; Horner, Daniel A.; Yip, Frank L.; McCurdy, C. William

2005-01-01T23:59:59.000Z

277

Interannual Variability of Summer Monsoon Onset over the Western North Pacific and the Underlying Processes  

Science Conference Proceedings (OSTI)

Climatological summer monsoon onset over the South China Sea (SCS) and the western North Pacific (WNP) (defined as the region of 10°–20°N, 120°–160°E) displays three distinct stages. Around mid-May, monsoon rain commences in the SCS and the ...

Renguang Wu; Bin Wang

2000-07-01T23:59:59.000Z

278

Byte-precision level of detail processing for variable precision analytics  

Science Conference Proceedings (OSTI)

I/O bottlenecks in HPC applications are becoming a more pressing problem as compute capabilities continue to outpace I/O capabilities. While double-precision simulation data often must be stored losslessly, the loss of some of the fractional component ...

John Jenkins; Eric R. Schendel; Sriram Lakshminarasimhan; David A. Boyuka, II; Terry Rogers; Stephane Ethier; Robert Ross; Scott Klasky; Nagiza F. Samatova

2012-11-01T23:59:59.000Z

279

Multilevel Regression Modeling of Nonlinear Processes: Derivation and Applications to Climatic Variability  

Science Conference Proceedings (OSTI)

Predictive models are constructed to best describe an observed field’s statistics within a given class of nonlinear dynamics driven by a spatially coherent noise that is white in time. For linear dynamics, such inverse stochastic models are ...

S. Kravtsov; D. Kondrashov; M. Ghil

2005-11-01T23:59:59.000Z

280

Climate Variability of the Intensity of Synoptic Processes in the North Atlantic Midlatitudes  

Science Conference Proceedings (OSTI)

Long-term interannual variations of the intramonthly standard deviations of surface meteorological parameters are studied on the basis of the North Atlantic Ocean Weather Stations (OWSs) dataset. To consider the different scales of short-term ...

Sergey K. Gulev

1997-04-01T23:59:59.000Z

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


281

IS ACTIVE REGION CORE VARIABILITY AGE DEPENDENT?  

Science Conference Proceedings (OSTI)

The presence of both steady and transient loops in active region cores has been reported from soft X-ray and extreme-ultraviolet observations of the solar corona. The relationship between the different loop populations, however, remains an open question. We present an investigation of the short-term variability of loops in the core of two active regions in the context of their long-term evolution. We take advantage of the nearly full Sun observations of STEREO and Solar Dynamics Observatory spacecraft to track these active regions as they rotate around the Sun multiple times. We then diagnose the variability of the active region cores at several instances of their lifetime using EIS/Hinode spectral capabilities. We inspect a broad range of temperatures, including for the first time spatially and temporally resolved images of Ca XIV and Ca XV lines. We find that the active region cores become fainter and steadier with time. The significant emission measure at high temperatures that is not correlated with a comparable increase at low temperatures suggests that high-frequency heating is viable. The presence, however, during the early stages, of an enhanced emission measure in the ''hot'' (3.0-4.5 MK) and ''cool'' (0.6-0.9 MK) components suggests that low-frequency heating also plays a significant role. Our results explain why there have been recent studies supporting both heating scenarios.

Ugarte-Urra, Ignacio [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States); Warren, Harry P. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)

2012-12-10T23:59:59.000Z

282

Variably insulating portable heater/cooler  

DOE Patents (OSTI)

A compact vacuum insulation panel is described comprising a chamber enclosed by two sheets of metal, glass-like spaces disposed in the chamber between the sidewalls, and a high-grade vacuum in the chamber includes apparatus and methods for enabling and disabling, or turning ``on`` and ``off`` the thermal insulating capability of the panel. One type of enabling and disabling apparatus and method includes a metal hydride for releasing hydrogen gas into the chamber in response to heat, and a hydrogen grate between the metal hydride and the chamber for selectively preventing and allowing return of the hydrogen gas to the metal hydride. Another type of enabling and disabling apparatus and method includes a variable emissivity coating on the sheets of metal in which the emissivity is controllably variable by heat or electricity. Still another type of enabling and disabling apparatus and method includes metal-to-metal contact devices that can be actuated to establish or break metal-to-metal heat paths or thermal short circuits between the metal sidewalls. 25 figs.

Potter, T.F.

1998-09-29T23:59:59.000Z

283

Variable temperature seat climate control system  

DOE Patents (OSTI)

A temperature climate control system comprises a variable temperature seat, at least one heat pump, at least one heat pump temperature sensor, and a controller. Each heat pump comprises a number of Peltier thermoelectric modules for temperature conditioning the air in a main heat exchanger and a main exchanger fan for passing the conditioned air from the main exchanger to the variable temperature seat. The Peltier modules and each main fan may be manually adjusted via a control switch or a control signal. Additionally, the temperature climate control system may comprise a number of additional temperature sensors to monitor the temperature of the ambient air surrounding the occupant as well as the temperature of the conditioned air directed to the occupant. The controller is configured to automatically regulate the operation of the Peltier modules and/or each main fan according to a temperature climate control logic designed both to maximize occupant comfort during normal operation, and minimize possible equipment damage, occupant discomfort, or occupant injury in the event of a heat pump malfunction.

Karunasiri, Tissa R. (Van Nuys, CA); Gallup, David F. (Pasadena, CA); Noles, David R. (Glendale, CA); Gregory, Christian T. (Alhambra, CA)

1997-05-06T23:59:59.000Z

284

Variably insulating portable heater/cooler  

DOE Green Energy (OSTI)

A compact vacuum insulation panel comprising a chamber enclosed by two sheets of metal, glass-like spaces disposed in the chamber between the sidewalls, and a high-grade vacuum in the chamber includes apparatus and methods for enabling and disabling, or turning "on" and "off" the thermal insulating capability of the panel. One type of enabling and disabling apparatus and method includes a metal hydride for releasing hydrogen gas into the chamber in response to heat, and a hydrogen grate between the metal hydride and the chamber for selectively preventing and allowing return of the hydrogen gas to the metal hydride. Another type of enabling and disabling apparatus and method includes a variable emissivity coating on the sheets of metal in which the emissivity is controllably variable by heat or electricity. Still another type of enabling and disabling apparatus and method includes metal-to-metal contact devices that can be actuated to establish or break metal-to-metal heat paths or thermal short circuits between the metal sidewalls.

Potter, Thomas F. (Denver, CO)

1998-01-01T23:59:59.000Z

285

Process concept of retorting of Julia Creek oil shale  

SciTech Connect

A process is proposed for the above ground retorting of the Julia Creek oil shale in Queensland. The oil shale characteristics, process description, chemical reactions of the oil shale components, and the effects of variable and operating conditions on process performance are discussed. The process contains a fluidized bed combustor which performs both as a combustor of the spent shales and as a heat carrier generator for the pyrolysis step. 12 references, 5 figures, 5 tables.

Sitnai, O.

1984-06-01T23:59:59.000Z

286

Variable Speed Drive Volumetric Tracking (VSDVT) for Airflow Control in Variable Air Volume (VAV) Systems  

E-Print Network (OSTI)

An airflow control method has been developed for variable air volume (VAV) systems. This airflow control method is named VSD volumetric tracking (VSDVT) since both the supply and return airflows are determined using signals of the variable speed drives (VSD) instead of the flow stations. Its performance is studied and compared with the fan tracking (FT) method using model simulations. The VSDVT maintains a constant building pressure and the required outside airflow under all load conditions, reduces the annual return air fan energy by up to 50%, and the annual supply air fan energy by up to 30%. This paper presents the VSDVT method, the system models, and the simulation results.

Liu, M.

2002-01-01T23:59:59.000Z

287

Variability of the Somali Current as Observed from Seasat Altimetry  

Science Conference Proceedings (OSTI)

Three methods of extraction of mesoscale variability from altimetry are compared in the Somali current area: crossover residuals after minimization to reduce orbit errors, along-track variability using quasi-repetitive tracks, and difference ...

C. Perigaud; J. F. Minster

1988-01-01T23:59:59.000Z

288

U-090: RSA enVision Discloses Environment Variable Information...  

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

0: RSA enVision Discloses Environment Variable Information to Remote Users U-090: RSA enVision Discloses Environment Variable Information to Remote Users January 27, 2012 - 6:00am...

289

Stochastic Forcing of Ocean Variability by the North Atlantic Oscillation  

Science Conference Proceedings (OSTI)

At middle and high latitudes, the magnitude of stochastic wind stress forcing of the ocean by atmospheric variability on synoptic time scales (i.e., “weather” related variability) is comparable to that of the seasonal cycle. Stochastic forcing ...

Kettyah C. Chhak; Andrew M. Moore; Ralph F. Milliff

2009-01-01T23:59:59.000Z

290

West African Monsoon Intraseasonal Variability: A Precipitable Water Perspective  

Science Conference Proceedings (OSTI)

West African monsoon intraseasonal variability has important implications for food security and drought early warnings. In the present study, intraseasonal variability over the Sahel is assessed from the perspective of precipitable water, as ...

D. Emmanuel Poan; Romain Roehrig; Fleur Couvreux; Jean-Philippe Lafore

2013-04-01T23:59:59.000Z

291

Temporal Variability of Diapycnal Mixing in Shag Rocks Passage  

Science Conference Proceedings (OSTI)

Diapycnal mixing rates in the oceans have been shown to have a great deal of spatial variability, but the temporal variability has been little studied. Here results are presented from a method developed to calculate diapycnal diffusivity from ...

Gillian M. Damerell; Karen J. Heywood; David P. Stevens; Alberto C. Naveira Garabato

2012-03-01T23:59:59.000Z

292

Modeling the Variability of Sydney Harbor Wind Measurements  

Science Conference Proceedings (OSTI)

The time-dependent behavior in the variability of wind measurements is investigated using bivariate generalized autoregressive conditional heteroscedastic models. These models express the current level of short-timescale wind variability in terms ...

Edward Cripps; William T. M. Dunsmuir

2003-08-01T23:59:59.000Z

293

LPB Hydro-Climate Variability as Simulated by GCM Experiments...  

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

LPB Hydro-Climate Variability as Simulated by GCM Experiments: Role of Remote SST Forcing Title LPB Hydro-Climate Variability as Simulated by GCM Experiments: Role of Remote SST...

294

Snowpack spatial variability: towards understanding its effect on remote sensing  

E-Print Network (OSTI)

Snowpack spatial variability: towards understanding its effect on remote sensing measurements spatial variability: towards understanding its effect on remote sensing mea- surements and snow slope large errors in these basin estimates. Remote sensing measurements offer a promising alternative, due

Marshall, Hans-Peter

295

Modeling Climate Variability in the Tropical Atlantic Atmosphere  

Science Conference Proceedings (OSTI)

Climate variability in the tropical Atlantic sector as represented in six atmospheric general circulation models is examined. On the annual mean, most simulations overestimate wind stress away from the equator although much of the variability can ...

Jiande Wang; James A. Carton

2003-12-01T23:59:59.000Z

296

Spatial Variability of Shortwave Irradiance for Snowmelt in Forests  

Science Conference Proceedings (OSTI)

The spatial variation of melt energy can influence snow cover depletion rates and in turn be influenced by the spatial variability of shortwave irradiance to snow. The spatial variability of shortwave irradiance during melt under uniform and ...

John Pomeroy; Chad Ellis; Aled Rowlands; Richard Essery; Janet Hardy; Tim Link; Danny Marks; Jean Emmanuel Sicart

2008-12-01T23:59:59.000Z

297

Intraseasonal Variability over Tropical Africa during Northern Summer  

Science Conference Proceedings (OSTI)

The intraseasonal variability over Africa during northern summer was analyzed, using 25 years of NCEP– NCAR reanalysis and satellite data. The dominant pattern of variability was one of enhanced deep convection over the whole African monsoon ...

Adrian J. Matthews

2004-06-01T23:59:59.000Z

298

Tropical Cloud Feedbacks and Natural Variability of Climate  

Science Conference Proceedings (OSTI)

Simulations of natural variability by two GCMs are examined. One GCM is a sector model, allowing relatively rapid integration without simplification of the model physics, which would potentially exclude mechanisms of variability. Two mechanisms ...

R. L. Miller; A. D. Del Genio

1994-09-01T23:59:59.000Z

299

A search for chaotic behavior in Northern Hemisphere stratospheric variability  

Science Conference Proceedings (OSTI)

Northern Hemisphere stratospheric variability is investigated with respect to chaotic behavior using time series from three different variables extracted from four different re-analysis products and two numerical model runs with different forcing. ...

Gualtiero Badin; Daniela I.V. Domeisen

300

Jet Jumping: Low-Frequency Variability in the Southern Ocean  

Science Conference Proceedings (OSTI)

The authors study intrinsic variability in the position of jets in a ?-plane channel ocean with simple topography using a quasigeostrophic numerical model. This study links the variability in jet position with abyssal anticyclones that form as a ...

Christopher C. Chapman; Andrew McC. Hogg

2013-05-01T23:59:59.000Z

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


301

Role of Smarter Grids in Variable Renewable Resource Integration (Presentation)  

Science Conference Proceedings (OSTI)

This presentation discusses the role of smarter grids in variable renewable resource integration and references material from a forthcoming ISGAN issue paper: Smart Grid Contributions to Variable Renewable Resource Integration, co-written by the presenter and currently in review.

Miller, M.

2012-07-01T23:59:59.000Z

302

Dynamical paths and universality in continuous variables open systems  

E-Print Network (OSTI)

We address the dynamics of quantum correlations in continuous variable open systems and analyze the evolution of bipartite Gaussian states in independent noisy channels. In particular, upon introducing the notion of dynamical path through a suitable parametrization for symmetric states, we focus attention on phenomena that are common to Markovian and non-Markovian Gaussian maps under the assumptions of weak coupling and secular approximation. We found that the dynamical paths in the parameter space are universal, that is they do depend only on the initial state and on the effective temperature of the environment, with non Markovianity that manifests itself in the velocity of running over a given path. This phenomenon allows one to map non-Markovian processes onto Markovian ones and it may reduce the number of parameters needed to study a dynamical process, e.g. it may be exploited to build constants of motions valid for both Markovian and non-Markovian maps. Universality is also observed in the value of Gaussian discord at the separability threshold, which itself is a function of the sole initial conditions in the limit of high temperature. We also prove the existence of excluded regions in the parameter space, i.e. of sets of states which cannot be linked by any Gaussian dynamical map.

Andrea Cazzaniga; Sabrina Maniscalco; Stefano Olivares; Matteo G. A. Paris

2012-11-27T23:59:59.000Z

303

Holographic Dark Energy Scenario and Variable Modified Chaplygin Gas  

E-Print Network (OSTI)

In this letter, we have considered that the universe is filled with normal matter and variable modified Chaplygin gas. Also we have considered the interaction between normal matter and variable modified Chaplygin gas in FRW universe. Then we have considered a correspondence between the holographic dark energy density and interacting variable modified Chaplygin gas energy density. Then we have reconstructed the potential of the scalar field which describes the variable modified Chaplygin cosmology.

Surajit Chattopadhyay; Ujjal Debnath

2009-01-15T23:59:59.000Z

304

Bayesian Variable Selection and the Swendsen-Wang Algorithm  

E-Print Network (OSTI)

Bayesian Variable Selection and the Swendsen-Wang Algorithm David J. NOTT and Peter J. GREEN improvements in Markov chain Monte Carlo sampling algorithms for Bayesian variable selection. Currently used, this excludes the ith predictor from the model. The problem of variable selection is to decide which predictors

Green, Peter

305

Bayesian variable selection and the Swendsen-Wang algorithm  

E-Print Network (OSTI)

Bayesian variable selection and the Swendsen-Wang algorithm David J. Nott1 and Peter J. Green2 1 motivated improvements in Markov chain Monte Carlo sampling algorithms for Bayesian variable selection. Traditional sampling al- gorithms for Bayesian variable selection may perform poorly when there are severe

Barber, Stuart

306

Internal Audit Process  

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

7 Internal Audit Process 110304 Page 1 of 7 EOTA - Business Process Document Title: Internal Audit Process Document Number: P-007 Rev. 110304 Document Owner: Elizabeth Sousa...

307

Facetting Process - CECM  

E-Print Network (OSTI)

May 20, 1997 ... Besides the stellation process, one can construct new polyhedra using the faceting process. In the faceting process, we retain the vertices of the ...

308

Quantifying decoherence in continuous variable systems  

E-Print Network (OSTI)

We present a detailed report on the decoherence of quantum states of continuous variable systems under the action of a quantum optical master equation resulting from the interaction with general Gaussian uncorrelated environments. The rate of decoherence is quantified by relating it to the decay rates of various, complementary measures of the quantum nature of a state, such as the purity, some nonclassicality indicators in phase space and, for two-mode states, entanglement measures and total correlations between the modes. Different sets of physically relevant initial configurations are considered, including one- and two-mode Gaussian states, number states, and coherent superpositions. Our analysis shows that, generally, the use of initially squeezed configurations does not help to preserve the coherence of Gaussian states, whereas it can be effective in protecting coherent superpositions of both number states and Gaussian wave packets.

A. Serafini; M. G. A. Paris; F. Illuminati; S. De Siena

2005-01-28T23:59:59.000Z

309

Quantifying decoherence in continuous variable systems  

E-Print Network (OSTI)

We present a detailed report on the decoherence of quantum states of continuous variable systems under the action of a quantum optical master equation resulting from the interaction with general Gaussian uncorrelated environments. The rate of decoherence is quantified by relating it to the decay rates of various, complementary measures of the quantum nature of a state, such as the purity, some nonclassicality indicators in phase space and, for two-mode states, entanglement measures and total correlations between the modes. Different sets of physically relevant initial configurations are considered, including one- and two-mode Gaussian states, number states, and coherent superpositions. Our analysis shows that, generally, the use of initially squeezed configurations does not help to preserve the coherence of Gaussian states, whereas it can be effective in protecting coherent superpositions of both number states and Gaussian wave packets. 1

A. Serafini; M. G. A. Paris; F. Illuminati; S. De Siena

2005-01-01T23:59:59.000Z

310

Variable selection in nonparametric additive models  

E-Print Network (OSTI)

We consider a nonparametric additive model of a conditional mean function in which the number of variables and additive components may be larger than the sample size but the number of nonzero additive components is "small" relative to the sample size. The statistical problem is to determine which additive components are nonzero. The additive components are approximated by truncated series expansions with B-spline bases. With this approximation, the problem of component selection becomes that of selecting the groups of coefficients in the expansion. We apply the adaptive group Lasso to select nonzero components, using the group Lasso to obtain an initial estimator and reduce the dimension of the problem. We give conditions under which the group Lasso selects a model whose number of components is comparable with the underlying model, and the adaptive group Lasso selects the nonzero components correctly with probability approaching one as the sample size increases and achieves the optimal rate of convergence. Th...

Huang, Jian; Wei, Fengrong; 10.1214/09-AOS781

2010-01-01T23:59:59.000Z

311

Variable Interactions in Query-Driven Visualization  

SciTech Connect

One fundamental element of scientific inquiry is discoveringrelationships, particularly the interactions between different variablesin observed or simulated phenomena. Building upon our prior work in thefield of Query-Driven Visualization, where visual data analysisprocessing is focused on subsets of large data deemed to be"scientifically interesting," this new work focuses on a novel knowledgediscovery capability suitable for use with petascale class datasets. Itenables visual presentation of the presence or absence of relationships(correlations) between variables in data subsets produced by Query-Drivenmethodologies. This technique holds great potential for enablingknowledge discovery from large and complex datasets currently emergingfrom SciDAC and INCITE projects. It is sufficiently generally to beapplicable to any time of complex, time-varying, multivariate data fromstructured, unstructured or adaptive grids.

Bethel, E. Wes; Gosink, Luke J.; Anderson, John C.; Joy, Kenneth I.

2007-10-25T23:59:59.000Z

312

Forecasting neutron star temperatures: predictability and variability  

E-Print Network (OSTI)

It is now possible to model thermal relaxation of neutron stars after bouts of accretion during which the star is heated out of equilibrium by nuclear reactions in its crust. Major uncertainties in these models can be encapsulated in modest variations of a handful of fudge parameters that change the crustal thermal conductivity, specific heat, and heating rates. Observations of thermal relaxation constrain these fudge parameters and allow us to predict longer term variability in terms of the neutron star core temperature. We demonstrate this explicitly by modeling ongoing thermal relaxation in the neutron star XTE J1701-462. Its future cooling, over the next 5 to 30 years, is strongly constrained and depends mostly on its core temperature, uncertainties in crust physics having essentially been pinned down by fitting to the first three years of observations.

Dany Page; Sanjay Reddy

2013-07-17T23:59:59.000Z

313

Variational estimates using a discrete variable representation  

SciTech Connect

The advantage of using a discrete variable representation (DVR) is that the Hamiltonian of two interacting particles can be constructed in a very simple form. However, the DVR Hamiltonian is approximate and, as a consequence, the results cannot be considered as variational ones. We will show that the variational character of the results can be restored by performing a reduced number of integrals. In practice, for a variational description of the lowest n bound states only n(n+1)/2 integrals are necessary whereas D(D+1)/2 integrals are enough for the scattering states (D is the dimension of the S matrix). Applications of the method to the study of dimers of He, Ne and Ar, for both bound and scattering states, are presented.

Lombardi, M.; Barletta, P.; Kievsky, A. [Istituto Nazionale di Fisica Nucleare, Via Buonarroti 2, 56100 Pisa (Italy); Dipartimento di Fisica, Universita di Pisa, 56100 Pisa (Italy)

2004-09-01T23:59:59.000Z

314

Continuous variable tangle, monogamy inequality, and entanglement sharing in Gaussian states of continuous variable systems  

E-Print Network (OSTI)

For continuous-variable systems, we introduce a measure of entanglement, the continuous variable tangle ({\\em contangle}), with the purpose of quantifying the distributed (shared) entanglement in multimode, multipartite Gaussian states. This is achieved by a proper convex roof extension of the squared logarithmic negativity. We prove that the contangle satisfies the Coffman-Kundu-Wootters monogamy inequality in all three--mode Gaussian states, and in all fully symmetric $N$--mode Gaussian states, for arbitrary $N$. For three--mode pure states we prove that the residual entanglement is a genuine tripartite entanglement monotone under Gaussian local operations and classical communication. We show that pure, symmetric three--mode Gaussian states allow a promiscuous entanglement sharing, having both maximum tripartite residual entanglement and maximum couplewise entanglement between any pair of modes. These states are thus simultaneous continuous-variable analogs of both the GHZ and the $W$ states of three qubits: in continuous-variable systems monogamy does not prevent promiscuity, and the inequivalence between different classes of maximally entangled states, holding for systems of three or more qubits, is removed.

Gerardo Adesso; Fabrizio Illuminati

2004-10-06T23:59:59.000Z

315

Stochastic variability of effective properties via the generalized variability response function  

Science Conference Proceedings (OSTI)

Homogenization of randomly heterogeneous material properties into effective properties is an essential procedure in facilitating the analysis of a wide range of mechanics problems. Although formulas exist to calculate deterministic effective properties ... Keywords: Effective properties, Random fields, Uncertainty quantification, Variability response functions

Kirubel Teferra; Sanjay R. Arwade; George Deodatis

2012-11-01T23:59:59.000Z

316

The TAOS Project Stellar Variability II. Detection of 15 Variable Stars  

SciTech Connect

The Taiwanese-American Occultation Survey (TAOS) project has collected more than a billion photometric measurements since 2005 January. These sky survey data - covering timescales from a fraction of a second to a few hundred days - are a useful source to study stellar variability. A total of 167 star fields, mostly along the ecliptic plane, have been selected for photometric monitoring with the TAOS telescopes. This paper presents our initial analysis of a search for periodic variable stars from the time-series TAOS data on one particular TAOS field, No. 151 (RA = 17{sup h} 30{sup m} 6.67{sup s}, Dec = 27 degrees, 17 minutes, 30 seconds, J2000), which had been observed over 47 epochs in 2005. A total of 81 candidate variables are identified in the 3 square degree field, with magnitudes in the range 8 < R < 16. On the basis of the periodicity and shape of the lightcurves, 32 variables, 18 of which were previously unknown, are classified as RR Lyrae, Cepheid, {delta} Scuti, SX Phonencis, semi-regular and eclipsing binaries.

Mondal, S; Lin, C C; Zhang, Z W; Alcock, C; Axelrod, T; Bianco, F B; Byun, Y I; Coehlo, N K; Cook, K H; Dave, R; Kim, D W; King, S K; Lee, T; Lehner, M J; Lin, H C; Marshall, S L; Protopapas, P; Rice, J A; Schwamb, M E; Wang, J H; Wang, S Y; Wen, C Y

2010-01-28T23:59:59.000Z

317

Characterisation of soil texture variability using the apparent soil electrical conductivity at a highly variable site  

Science Conference Proceedings (OSTI)

The characterisation of the spatial distribution of clay, silt, and sand/gravel is one of the main objectives of soil surveys. Researchers as well as producers have an interest in characterising soil texture variability. The objective of our study was ... Keywords: Clay, EM38, Residual kriging, Sand/gravel, Silt, Spatial heterogeneity

K. Heil; U. Schmidhalter

2012-02-01T23:59:59.000Z

318

Feed Variability and Bulk Vitrification Glass Performance Assessment  

Science Conference Proceedings (OSTI)

The supplemental treatment (ST) bulk vitrification process will obtain its feed, consisting of low-activity waste (LAW), from more than one source. One purpose of this letter report is to describe the compositional variability of the feed to ST. The other is to support the M-62-08 decision by providing a preliminary assessment of the effectiveness of bulk vitrification (BV), the process that has been selected to perform supplemental treatment, in handling the ST feed envelope. Roughly nine-tenths of the ST LAW feed will come from the Waste Treatment Plant (WTP) pretreatment. This processed waste is expected to combine (1) a portion of the same LAW feed sent to the WTP melters and (2) a dilute stream that is the product of the condensate from the submerged-bed scrubber (SBS) and the drainage from the electrostatic precipitator (WESP), both of which are part of the LAW off-gas system. The manner in which the off-gas-product stream is concentrated to reduce its volume, and the way in which the excess LAW and off-gas product streams are combined, are part of the interface between WTP and ST and have not been determined. This letter report considers only one possible arrangement, in which half of the total LAW is added to the off-gas product stream, giving an estimated ST feed stream from WTP. (Total LAW equals that portion of LAW sent to the WTP LAW vitrification plant (WTP LAW) plus the LAW not currently treatable in the LAW vitrification plant due to capacity limitations (excess)).

Mahoney, Lenna A.; Vienna, John D.

2005-01-10T23:59:59.000Z

319

Variable Stars in the Globular Cluster NGC 4590 (M68  

E-Print Network (OSTI)

We present results of time series photometry to search for variable stars in the field of metal-poor globular cluster NGC 4590 (M68). Periods have been revised for 40 known variables and no significant changes were found. A considerable change in Blazhko effect for V25 has been detected. Among nine newly discovered variable candidates, 5 stars are of RRc Bailey type variables while 4 stars are unclassified. The variable stars V10, V21, V50 and V51 are found to be cluster members based on the radial velocity data taken from literature.

Sariya, Devesh Path; Yadav, R K S

2013-01-01T23:59:59.000Z

320

Corrective Actions Process  

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

Stewardship Environmental Cleanup Corrective Actions Corrective Actions Process The general process for evaluating and remediating potential release sites is called...

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


321

NREL Nondisclosure Agreement Process  

Title: NREL Nondisclosure Agreement Process Subject: Shows NREL's nondisclosure agreement process Author: Heidi Rex Keywords: nondisclosure agreement NDA proprietary ...

322

Materials Processing & Manufacturing Division  

Science Conference Proceedings (OSTI)

In its broadest scope, the Materials Processing & Manufacturing Division (MPMD) covers manufacturing from product design to production, integrating process ...

323

Building Technologies Office: Advanced, Variable Speed Air-Source  

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

Advanced, Variable Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project to someone by E-mail Share Building Technologies Office: Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project on Facebook Tweet about Building Technologies Office: Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project on Twitter Bookmark Building Technologies Office: Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project on Google Bookmark Building Technologies Office: Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project on Delicious Rank Building Technologies Office: Advanced, Variable Speed Air-Source Integrated Heat Pumps Research Project on Digg Find More places to share Building Technologies Office: Advanced,

324

Fast Selection of Spectral Variables with B-Spline Compression  

E-Print Network (OSTI)

The large number of spectral variables in most data sets encountered in spectral chemometrics often renders the prediction of a dependent variable uneasy. The number of variables hopefully can be reduced, by using either projection techniques or selection methods; the latter allow for the interpretation of the selected variables. Since the optimal approach of testing all possible subsets of variables with the prediction model is intractable, an incremental selection approach using a nonparametric statistics is a good option, as it avoids the computationally intensive use of the model itself. It has two drawbacks however: the number of groups of variables to test is still huge, and colinearities can make the results unstable. To overcome these limitations, this paper presents a method to select groups of spectral variables. It consists in a forward-backward procedure applied to the coefficients of a B-Spline representation of the spectra. The criterion used in the forward-backward procedure is the mutual infor...

Rossi, Fabrice; Wertz, Vincent; Meurens, Marc; Verleysen, Michel

2007-01-01T23:59:59.000Z

325

Analyzing interacting BPEL processes  

Science Conference Proceedings (OSTI)

This paper addresses the problem of analyzing the interaction between BPEL processes. We present a technology chain that starts out with a BPEL process and transforms it into a Petri net model. On the model we decide controllability of the process ... Keywords: business process modeling and analysis, formal models in business process management, petri nets, process verification and validation

Niels Lohmann; Peter Massuthe; Christian Stahl; Daniela Weinberg

2006-09-01T23:59:59.000Z

326

The Sun is an active, variable,  

E-Print Network (OSTI)

burning interior. Variations in solar activity cause changes in the space environment that affect our Solar System, life and society. Solar Terrestrial Probes are a sequence of missions designed to study the physical processes of the Sun-Earth connection. Visit Us on the Web: Solar Terrestrial Probes Program: http

Christian, Eric

327

EEO Complaint Process EEO Complaint Process INFORMAL PROCESS-COUNSELING  

National Nuclear Security Administration (NNSA)

Complaint Process Complaint Process EEO Complaint Process INFORMAL PROCESS-COUNSELING National Nuclear Security Administration Office of Civil Rights Equal Employment Opportunity: Collaborating For Mission Success EEO POLICY The Department of Energy (DOE) does not discriminate on the basis of age, color, race, disability (physical or mental), national origin, reprisal, religion, sex (including sexual harassment), sexual orientation, genetic information or any other non-merit factor. DOE is committed to equal employment opportunity principles and practices in all management decisions and personnel practices. The Department is committed to providing equal employment opportunity; eliminating discrimination in employment; and maintaining an environment that

328

Coal liquefaction process with enhanced process solvent  

DOE Patents (OSTI)

In an improved coal liquefaction process, including a critical solvent deashing stage, high value product recovery is improved and enhanced process-derived solvent is provided by recycling second separator underflow in the critical solvent deashing stage to the coal slurry mix, for inclusion in the process solvent pool.

Givens, Edwin N. (Bethlehem, PA); Kang, Dohee (Macungie, PA)

1984-01-01T23:59:59.000Z

329

Accounting for Unresolved Spatial Variability in Large Scale Models: Development and Evaluation of a Statistical Cloud Parameterization with Prognostic Higher Order Moments  

SciTech Connect

This project focused on the variability of clouds that is present across a wide range of scales ranging from the synoptic to the millimeter. In particular, there is substantial variability in cloud properties at scales smaller than the grid spacing of models used to make climate projections (GCMs) and weather forecasts. These models represent clouds and other small-scale processes with parameterizations that describe how those processes respond to and feed back on the largescale state of the atmosphere.

Robert Pincus

2011-05-17T23:59:59.000Z

330

Device for adapting continuously variable transmissions to infinitely variable transmissions with forward-neutral-reverse capabilities  

DOE Patents (OSTI)

An infinitely variable transmission is capable of operating between a maximum speed in one direction and a minimum speed in an opposite direction, including a zero output angular velocity, while being supplied with energy at a constant angular velocity. Input energy is divided between a first power path carrying an orbital set of elements and a second path that includes a variable speed adjustment mechanism. The second power path also connects with the orbital set of elements in such a way as to vary the rate of angular rotation thereof. The combined effects of power from the first and second power paths are combined and delivered to an output element by the orbital element set. The transmission can be designed to operate over a preselected ratio of forward to reverse output speeds.

Wilkes, Donald F. (Albuquerque, NM); Purvis, James W. (Albuquerque, NM); Miller, A. Keith (Albuquerque, NM)

1997-01-01T23:59:59.000Z

331

REMARKABLE SPECTRAL VARIABILITY OF PDS 456  

SciTech Connect

We report on the highest to date signal-to-noise ratio X-ray spectrum of the luminous quasar PDS 456, as obtained during two XMM-Newton orbits in 2007 September. The present spectrum is considerably different from several previous X-ray spectra recorded for PDS 456 since 1998. The ultra-high-velocity outflow seen as recently as 2007 February is not detected in absorption. Conversely, a significant reflection component is detected (DELTAchi{sup 2} = 313 compared to a simple absorbed power law). The reflection model suggests that the reflecting medium may be outflowing at a velocity v/c = -0.06 +- 0.02 (DELTAchi{sup 2} = 28 compared to v/c = 0). The present spectrum is analyzed in the context of the previous ones in an attempt to understand all spectra within the framework of a single model. We examine whether an outflow with variable partial covering of the X-ray source along the line of sight that also reflects the source from other lines of sight can explain the dramatic variations in the broadband spectral curvature of PDS 456. It is established that absorption plays a major role in shaping the spectrum of other epochs, while the 2007 XMM-Newton spectrum is dominated by reflection, and the coverage of the source by the putative outflow is small (<20%).

Behar, Ehud; Mushotzky, Richard [Code 662, NASA/Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Kaspi, Shai [Department of Physics, Technion, Haifa 32000 (Israel); Reeves, James [School of Physics and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG (United Kingdom); Turner, T. J. [Department of Physics, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 (United States); O'Brien, Paul T. [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom)

2010-03-20T23:59:59.000Z

332

MEXICAN CORN: Genetic Variability and Trade Liberalisation  

E-Print Network (OSTI)

It is now a well established fact that corn (Zea mays) originated in Mexico and that a great part of the evolution that may be observed in terms of this plant’s genetic variability took place in this country. 2 As the plant’s history unfolded, early forms of these races were taken by people into a wide variety of environments and ecological niches from which many distinct varieties developed in the relative isolation of these separated regions. Thus, Mexico also became a center of genetic diversity for corn, and its stock of germplasm has contributed in a decisive manner to global production of corn. Even the dented varieties of the U.S. Corn Belt are close descendants of the first Mexican landraces. The germplasm resources that are deposited in Mexico’s corn varieties, as well as in the wild relatives of this crop, are of prime importance for the world’s food production system of the next century. 3 Corn germplasm of Mexican origin has played a critical role in improvements for corn cultivated in tropical regions in relation to yield increments, plague resistance, short growth cycle, drought resistance and increases of protein content of grain. It has also been instrumental in increasing yields in the case of corn produced in temperate regions at high latitudes. Mexican 1

Alejandro Nadal; El Colegio De México; Alejandro Nadal; El Colegio De México

2000-01-01T23:59:59.000Z

333

Missing data outside the detector range: application to continuous variable entanglement verification and quantum cryptography  

E-Print Network (OSTI)

In continuous-variable quantum information processing detectors are necessarily coarse grained and of finite range. We discuss how especially the latter feature is a bug and may easily lead to overoptimistic estimates of entanglement and of security, when missed data outside the detector range are ignored. We show that entropic separability or security criteria are much superior to variance-based criteria for mitigating the negative effects of this bug.

Megan R. Ray; S. J. van Enk

2013-02-20T23:59:59.000Z

334

Guide to the Industrial Application of Motors and Variable-Speed Drives  

Science Conference Proceedings (OSTI)

This application guide is intended to aid in screening, selecting, and procuring specification processes for variable frequency drive (VFD) installations. It also is intended to provide a comprehensive up-to-date assessment of opportunities to save energy and improve power quality performance with state-of-the-art VFD technologies. The document supplies background information on electric motors and applications, describes VFD topologies, and details procurement specifications and application consideratio...

2001-09-27T23:59:59.000Z

335

Improving productivity in food processing industries using simulation: a case study  

Science Conference Proceedings (OSTI)

Process optimization is a major decision problem when drawing a balance between meeting variable demands and maintaining the quality of products in food processing industries. Simulation is a useful technique to study the effects of system changes in ... Keywords: business process reengineering, food processing, production planning, productivity, simulation models

Seraj Yousef Abed

2008-07-01T23:59:59.000Z

336

VARIABILITY OF KD VALUES IN CEMENTITIOUS MATERIALS AND SEDIMENTS  

Science Conference Proceedings (OSTI)

Measured distribution coefficients (K{sub d} values) for environmental contaminants provide input data for performance assessments (PA) that evaluate physical and chemical phenomena for release of radionuclides from wasteforms, degradation of engineered components and subsequent transport of radionuclides through environmental media. Research efforts at SRNL to study the effects of formulation and curing variability on the physiochemical properties of the saltstone wasteform produced at the Saltstone Disposal Facility (SDF) are ongoing and provide information for the PA and Saltstone Operations. Furthermore, the range and distribution of plutonium K{sub d} values in soils is not known. Knowledge of these parameters is needed to provide guidance for stochastic modeling in the PA. Under the current SRS liquid waste processing system, supernate from F & H Tank Farm tanks is processed to remove actinides and fission products, resulting in a low-curie Decontaminated Salt Solution (DSS). At the Saltstone Production Facility (SPF), DSS is mixed with premix, comprised of blast furnace slag (BFS), Class F fly ash (FA), and portland cement (OPC) to form a grout mixture. The fresh grout is subsequently placed in SDF vaults where it cures through hydration reactions to produce saltstone, a hardened monolithic waste form. Variation in saltstone composition and cure conditions of grout can affect the saltstone's physiochemical properties. Variations in properties may originate from variables in DSS, premix, and water to premix ratio, grout mixing, placing, and curing conditions including time and temperature (Harbour et al. 2007; Harbour et al. 2009). There are no previous studies reported in the literature regarding the range and distribution of K{sub d} values in cementitious materials. Presently, the Savannah River Site (SRS) estimate ranges and distributions of K{sub d} values based on measurements of K{sub d} values made in sandy SRS sediments (Kaplan 2010). The actual cementitious material K{sub d} values and solubility values differ from the sandy sediments. The K{sub d} value range and distribution currently used in the PA are estimated to range between 0.25*K{sub d} and 1.75*K{sub d}, where the minimum and maximum values of the ranges reflect the 95% confidence level for the mean K{sub d} value (Kaplan 2010). The objective of the research with cementitious materials was to measure the range and distribution of a monovalent (Cs) and I{sup -} (anion), divalent (Sr), and trivalent (Eu) ions for a variety of laboratory-prepared saltstone surrogate samples to establish a K{sub d} range other than that which is presently used in the PA. It has been observed in laboratory samples that cure temperature profiles can affect properties such as heat of hydration, permeability, porosity, compressive strength, and set time (Harbour et al. 2009). The intent was to identify a range and distribution that could be used by stochastic modelers for the PA. Furthermore, the intent was to replace the arbitrarily selected distributions based on geological sandy sediments and to base it on actual cementitious materials. The scope of this study did not include understanding saltstone sorption mechanisms responsible for increasing or decreasing sorption. Similar to the work with cementitious materials, the purpose of the Pu sediment K{sub d} dataset was not to attempt to understand through statistics how to better understand Pu sorption to sediments or to lower Pu K{sub d} variance. The sediment Pu K{sub d} data is included in this study because it is a key risk driver for the PAs on the SRS, and there is presently no direct studies of Pu variability in SRS soils. Instead the distribution of Pu sediment K{sub d} values was assumed to be similar to other cations, as presented by Kaplan (2010).

Almond, P.; Kaplan, D.; Shine, E.

2012-02-02T23:59:59.000Z

337

VARIABLE CHARGE MOTION FOR 2007-2010 DIESEL ENGINES  

DOE Green Energy (OSTI)

The use of direct injection diesel engines in US heavy duty pickup truck applications is becoming increasingly popular with over 250,000 produced in 2002. The high torque density and greatly improved fuel consumption offer distinct advantages to the end user. 2007 and 2010 emissions legislation will present another set of technical and product cost challenges to this type of powertrain. The introduction of efficient aftertreatment systems is mandatory to the success of these engines but optimization of engine-out emissions is also a critical element. Much has been written on the improvements in modern fuel systems which offer great flexibility for the direct introduction of fuel into the cylinder. This paper presents complementary technologies which allow improved air/fuel mixing processes by the additional flexibility of variable in-cylinder charge motion. This approach is particularly applicable to pick-up truck engines, which require high BMEP levels across a wide engine speed range to offer the driveability demanded by the consumer. Design solutions for 2 valve and 4 valve engines are presented along with the potential emissions and fuel consumption benefits.

Maier, J

2003-08-24T23:59:59.000Z

338

Strategically balanced process adoption  

Science Conference Proceedings (OSTI)

Software processes have an important role to play in realizing organizational strategies. When a software organization is about to decide on the adoption of a new process, it should have a clear understanding of its own strategic objectives, as well ... Keywords: process adoption, software process, software process improvement, strategic management

Hesam Chiniforooshan Esfahani; Eric Yu; Maria Carmela Annosi

2011-05-01T23:59:59.000Z

339

NERC Presentation: Accommodating High Levels of Variable Generation,  

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

NERC Presentation: Accommodating High Levels of Variable NERC Presentation: Accommodating High Levels of Variable Generation, October 29, 2010 NERC Presentation: Accommodating High Levels of Variable Generation, October 29, 2010 North American Electric Reliability Corporation (NERC) presentation to the Electricity Advisory Committee, October 29, 2010, on accommodating high levels of variable electricity eneration. Variable resources are types of electric power generation that rely on an uncontrolled, "variable" fuel (e.g. wind, sunlight, waves, tidal forces, and some types of rivers) to generate electricity. Most renewablesfall into this category. Reliably integrating these resources into the bulk power system will require significant changes to traditional methods used for system planning and operation. Ongoing efforts brought together by NERC and its stakeholders

340

Carderock 2-ft Variable Pressure Cavitation Water Tunnel | Open Energy  

Open Energy Info (EERE)

2-ft Variable Pressure Cavitation Water Tunnel 2-ft Variable Pressure Cavitation Water Tunnel Jump to: navigation, search Basic Specifications Facility Name Carderock 2-ft Variable Pressure Cavitation Water Tunnel Overseeing Organization United States Naval Surface Warfare Center Hydrodynamic Testing Facility Type Tunnel Beam(m) 0.6 Depth(m) 0.6 Water Type Freshwater Cost(per day) Contact POC Special Physical Features The 2-Foot Variable Pressure Cavitation Water Tunnel is a vertical plane, closed recirculating, variable-speed, variable-pressure, open jet test section, closed jet test section, and semi-rectangular test section. Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) 17 Recirculating Yes

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341

Carderock 3-ft Variable Pressure Cavitation Water Tunnel | Open Energy  

Open Energy Info (EERE)

Variable Pressure Cavitation Water Tunnel Variable Pressure Cavitation Water Tunnel Jump to: navigation, search Basic Specifications Facility Name Carderock 3-ft Variable Pressure Cavitation Water Tunnel Overseeing Organization United States Naval Surface Warfare Center Hydrodynamic Testing Facility Type Tunnel Beam(m) 0.7 Depth(m) 0.7 Water Type Freshwater Cost(per day) Contact POC Special Physical Features The 3-ft Variable Pressure Cavitation Water Tunnel is a vertical plane, closed recirculating with resorber, variable-speed, variable-pressure, two interchangeable circular test sections. Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) 25.8 Recirculating Yes Wind Capabilities Wind Capabilities None

342

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network (OSTI)

Amarnath, M. Blatt, Variable refrigerant flow: where, why,simulation in the variable refrigerant flow air-conditioningsimulation of the variable refrigerant flow air conditioning

Hong, Tainzhen

2010-01-01T23:59:59.000Z

343

Multi-winding Homopolar Electric Machine Offers Variable ...  

The device can be used as either a motor or a generator. Advantages • Variable voltage and speed design • Internal mechanism allowing for low speed, high

344

Variable Renewable Generation Can Provide Balancing Control to...  

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

Variable Renewable Generation Can Provide Balancing Control to the Electric Power System e Active Power Control Helps Maintain System Frequency As wind and solar plants become more...

345

Multi-winding Homopolar Electric Machine Offers Variable Voltage ...  

Wind Energy Industrial Technologies Multi-winding Homopolar Electric Machine Offers Variable Voltage at Low Rotational Speed Oak Ridge National Laboratory. Contact ...

346

Variability in electricity demand highlights potential roles for ...  

U.S. Energy Information Administration (EIA)

Demand-response programs and technologies that tend to reduce the variability of hourly electric demand and the resulting supply requirement would reduce the need ...

347

Initial testing of a variable-stroke Stirling engine  

SciTech Connect

In support of the US Department of Energy's Stirling Engine Highway Vehicle Systems Program, NASA Lewis Research Center is evaluating variable-stroke control for Stirling engines. The engine being tested is the Advenco Stirling engine; this engine was manufactured by Philips Research Laboratories of the Netherlands and uses a variable-angle swash-plate drive to achieve variable stroke operation. This report describes the engine, presents initial steady-state test data taken at Lewis, and describes a major drive system failure and subsequent modifications. Computer simulation results are presented to show potential part-load efficiency gains with variable-stroke control.

Thieme, L.G.

1985-02-01T23:59:59.000Z

348

Changes in the Economic Value of Variable Generation at High...  

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

Levels: A Pilot Case Study of California Title Changes in the Economic Value of Variable Generation at High Penetration Levels: A Pilot Case Study of California Publication Type...

349

Institute of Computer Science Limited-memory projective variable ...  

E-Print Network (OSTI)

Institute of Computer Science. Academy of Sciences of the Czech Republic. Limited-memory projective variable metric methods for unconstrained minimization.

350

Variable Selection and Sensitivity Analysis via Dynamic Trees...  

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

trees, this approach allows for dynamic (sequential) variable selection with fully Bayesian evidence and sensitivity indices not previously enjoyed. Compared with GPs, it...

351

Free piston variable-stroke linear-alternator generator ...  

A free-piston variable stroke linear-alternator AC power generator for a combustion engine. An alternator mechanism and oscillator system generates AC current. The ...

352

The Discrete Variable Method for the Time Dependent and ...  

Science Conference Proceedings (OSTI)

... Abstract: The discrete variable representation (DVR) has been found to be a very effective approach for the numerical solution of the Schroedinger ...

2011-01-12T23:59:59.000Z

353

Processing Distinguished Service Award  

Science Conference Proceedings (OSTI)

Award honoring outstanding, meritorious service to the oilseed processing industry. Processing Distinguished Service Award Processing agricultural algae algal analytical aocs articles biomass biotechnology By-product Utilization courses detergents divisi

354

Coupled transport processes in semipermeable media  

DOE Green Energy (OSTI)

The thermodynamics of irreversible processes (TTIP) is used to derive governing equations and phenomenological equations for transport processes and chemical reactions in water-saturated semipermeable media. TTIP is based on three fundamental postulates. The first postulate, the assumption of local equilibrium, allows the formulation of balance equations for entropy. These equations are the bases for the derivation of governing equations for the thermodynamic variables, temperature, pressure, and composition. The governing equations involve vector fluxes of heat and mass and scalar rates of chemical reactions; in accordance with the second postulate of TTIP, these fluxes and rates are related, respectively, to all scalar driving forces (gradients of thermodynamic variables) acting within the system. The third postulate of TTIP states equality (the Onsager reciprocal relations) between certain of the phenomenological coefficients relating forces and fluxes. The description by TTIP of a system undergoing irreversible processes allows consideration of coupled transport processes such as thermal osmosis, chemical osmosis, and ultrafiltration. The coupled processes can make significant contributions to flows of mass and energy in slightly permeable, permselective geological materials such as clays and shales.

Carnahan, C.L.; Jacobsen, J.S.

1990-04-01T23:59:59.000Z

355

Processing & Applications IV: Radioactive Metals Processing  

Science Conference Proceedings (OSTI)

The compatibility between erbium oxide and molten cerium, as a surrogate for ... A key process step involving molten salt electrorefining to separate actinides ...

356

Process Folder Tool  

Science Conference Proceedings (OSTI)

... pfldr text file This file lists the processing steps for the 'Process folder' command. Make it, then assign it. Make: Make boiler plate for the pfldr text file. ...

357

Process Deviation Form  

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

3 Process Deviation Form 080822 Page 1 of 3 EOTA - Business Form Document Title: Process Deviation Form Document Number: F-013 Rev. 080822 Document Owner: Elizabeth Sousa Backup...

358

Postdoc Application Process  

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

Program Application Process Postdoc Application Process Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in...

359

Process Limits on Euclid  

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

Process Limits Process Limits Limit Hard Soft core file size (blocks) 0 unlimited data seg size (kbytes) unlimited unlimited scheduling priority 0 0 file size (blocks) unlimited...

360

Approximation of Stochastic Process  

E-Print Network (OSTI)

May 8, 2012 ... The approximation of stochastic processes by trees is an important topic in ... process ? is replaced by a finitely valued stochastic scenario ...

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


361

New-Hire Process  

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

Resources New-Hire Process careersassetsimagesicon-lego.jpg New-Hire Process Employees and retirees are the building blocks of LANL's success. Our employees get to...

362

Bayer Process Efficiency Improvement  

Science Conference Proceedings (OSTI)

Abstract Scope, The process efficiency has a great influence on the production yield, energy consumption, investment and operation cost in Bayer process.

363

Biofuel Conversion Process  

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

The conversion of biomass solids into liquid or gaseous biofuels is a complex process. Today, the most common conversion processes are biochemical- and thermochemical-based. However, researchers...

364

Design of Recycle/Reuse Networks with Thermal Effects and Variable Sources  

E-Print Network (OSTI)

Recycle/reuse networks are commonly used in industrial facilities to conserve natural resources, reduce environmental impact, and improve process economics. The design of these networks is a challenging task because of the numerous possibilities of assigning stream (process sources) to units that may potentially employ them (process sinks). Additionally, several fresh streams with different qualities and costs may be used to supplement the recycle of process streams. The selection of the type and flow of these fresh resources is an important step in the design of the recycle/reuse networks. This work introduces systematic approaches to address two new categories in the design of recycle/reuse networks: (a) The incorporation of thermal effects in the network. Two new aspects are introduced: heat of mixing of process sources and temperature constraints imposed on the feed to the process sinks iv (b) Dealing with variation in process sources. Two types of source variability are addressed: flowrate and composition For networks with thermal effects, an assignment optimization formulation is developed. Depending on the functional form of the heat of mixing, the formulation may be a linear or a nonlinear program. The solution of this program provides optimum flowrates of the fresh streams as well as the segregation, mixing, and allocation of the process sources to sinks. For networks with variable sources, a computer code is developed to solve the problem. It is based on discretizing the search space and using the concept of "floating pinch" to insure solution feasibility and optimal targets. Case studies are solved to illustrate the applicability of the new approaches.

Zavala Oseguera, Jose Guadalupe

2009-08-01T23:59:59.000Z

365

Canola: Chemistry, Production, Processing and UtilizationChapter 6 Processing  

Science Conference Proceedings (OSTI)

Canola: Chemistry, Production, Processing and Utilization Chapter 6 Processing Processing eChapters Processing AOCS Press Downloadable pdf of Chapter 6 Processing from ...

366

High-energy ion processing of materials for improved hardcoatings  

SciTech Connect

Research has been directed toward use of economically viable ion processing strategies for production and improvement of hardcoatings. Processing techniques were high-energy ion implantation and electron cyclotron resonance microwave plasma processing. Subject materials were boron suboxides, Ti-6Al-4V alloy, CoCrMo alloy (a Stellite{trademark}), and electroplated Cr. These materials may be regarded either as coatings themselves (which might be deposited by thermal spraying, plasma processing, etc.) or in some cases, as substrates whose surfaces can be improved. hardness and other properties in relation to process variables are reported.

Williams, J.M.; Gorbatkin, S.M.; Rhoades, R.L.; Oliver, W.C.; Riester, L.; Tsui, T.Y.

1994-02-01T23:59:59.000Z

367

The monitoring and control of TRUEX processes  

SciTech Connect

The Generic TRUEX Model (GTM) was used to design a flowsheet for the TRUEX solvent extraction process that would be used to determine its instrumentation and control requirements. Sensitivity analyses of the key process variables, namely, the aqueous and organic flow rates, feed compositions, and the number of contactor stages, were carried out to assess their impact on the operation of the TRUEX process. Results of these analyses provide a basis for the selection of an instrument and control system and the eventual implementation of a control algorithm. Volume Two of this report is an evaluation of the instruments available for measuring many of the physical parameters. Equations that model the dynamic behavior of the TRUEX process have been generated. These equations can be used to describe the transient or dynamic behavior of the process for a given flowsheet in accordance with the TRUEX model. Further work will be done with the dynamic model to determine how and how quickly the system responds to various perturbations. The use of perturbation analysis early in the design stage will lead to a robust flowsheet, namely, one that will meet all process goals and allow for wide control bounds. The process time delay, that is, the speed with which the system reaches a new steady state, is an important parameter in monitoring and controlling a process. In the future, instrument selection and point-of-variable measurement, now done using the steady-state results reported here, will be reviewed and modified as necessary based on this dynamic method of analysis.

Regalbuto, M.C.; Misra, B.; Chamberlain, D.B.; Leonard, R.A.; Vandegrift, G.F.

1992-04-01T23:59:59.000Z

368

Business Process Discovery Business Process Discovery  

E-Print Network (OSTI)

Well defined, organized, implemented, and managed Business Processes are very critical to the success of any organization that wants to operate efficiently. Business Process Management these days is not merely a buzzword but has become a very important field on which companies will want to focus. Typically when the companies are small, they have ad-hoc, non standard, non

Sandeep Jadhav

2011-01-01T23:59:59.000Z

369

Three-mode Gaussian states in quantum information with continuous variables  

E-Print Network (OSTI)

Abstract. The structural aspects of tripartite entanglement in three-mode Gaussian states of continuous variable systems have been studied in [Adesso G, Serafini A and Illuminati F 2006 Phys. Rev. A 73 032345]. Here we focus our attention on the usefulness of such states in the context of realistic processing of continuous-variable quantum information. We introduce and discuss in detail several examples of pure and mixed three-mode states that stand out for their informational and/or entanglement properties. We then describe practical schemes to engineer such states with linear optics. In particular, we introduce a simple procedure – based on passive optical elements – to produce pure three-mode Gaussian states with arbitrary entanglement structure (upon availability of an initial single-mode squeezed state). We analyze in detail the properties of distributed entanglement, showing that the promiscuity of entanglement sharing is a feature peculiar to symmetric Gaussian states that survives even in the presence of significant degrees of mixedness and decoherence. Next, we discuss the suitability of the considered tripartite entangled states to the implementation of quantum information and communication protocols with continuous variables. This will lead to a feasible experimental proposal to test the promiscuous sharing of continuous-variable entanglement, in terms of the

unknown authors

2006-01-01T23:59:59.000Z

370

Atmospheric variability of methyl chloride during the last 300 years from an Antarctic ice core and firn air  

E-Print Network (OSTI)

as a low-pass filter, smoothing variations in the atmospheric composition of a gas over decadal time scales core measurements from Siple Dome provide evidence for a cyclic natural variability on the order of 10 increase measured in firn air may largely be a result of natural processes, which may continue to affect

Saltzman, Eric

371

Prediction of autoignition in a lifted methane/air flame using an unsteady flamelet/progress variable model  

Science Conference Proceedings (OSTI)

An unsteady flamelet/progress variable (UFPV) model has been developed for the prediction of autoignition in turbulent lifted flames. The model is a consistent extension to the steady flamelet/progress variable (SFPV) approach, and employs an unsteady flamelet formulation to describe the transient evolution of all thermochemical quantities during the flame ignition process. In this UFPV model, all thermochemical quantities are parameterized by mixture fraction, reaction progress parameter, and stoichiometric scalar dissipation rate, eliminating the explicit dependence on a flamelet time scale. An a priori study is performed to analyze critical modeling assumptions that are associated with the population of the flamelet state space. For application to LES, the UFPV model is combined with a presumed PDF closure to account for subgrid contributions of mixture fraction and reaction progress variable. The model was applied in LES of a lifted methane/air flame. Additional calculations were performed to quantify the interaction between turbulence and chemistry a posteriori. Simulation results obtained from these calculations are compared with experimental data. Compared to the SFPV results, the unsteady flamelet/progress variable model captures the autoignition process, and good agreement with measurements is obtained for mixture fraction, temperature, and species mass fractions. From the analysis of scatter data and mixture fraction-conditional results it is shown that the turbulence/chemistry interaction delays the ignition process towards lower values of scalar dissipation rate, and a significantly larger region in the flamelet state space is occupied during the ignition process. (author)

Ihme, Matthias; See, Yee Chee [Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI 48109 (United States)

2010-10-15T23:59:59.000Z

372

Intraseasonal Variability in a Two-Layer Model and Observations  

Science Conference Proceedings (OSTI)

A two-layer shallow-water model with R15 truncation and topographic forcing is used to study intraseasonal variability in the Northern Hemisphere’s (NH’s) extratropical atmosphere. The model’s variability is dominated by oscillations with average ...

Christian L. Keppenne; Steven L. Marcus; Masahide Kimoto; Michael Ghil

2000-04-01T23:59:59.000Z

373

Sliding mode control law for a variable speed wind turbine  

Science Conference Proceedings (OSTI)

Modern wind turbines are designed in order to work in variable speed operations. To perform this task, wind turbines are provided with adjustable speed generators, like the double feed induction generator. One of the main advantage of adjustable speed ... Keywords: modeling and simulation, variable structure control, wind turbine control

Oscar Barambones; Jose Maria Gonzalez De Durana; Patxi Alkorta; Jose Antonio Ramos; Manuel De La Sen

2011-02-01T23:59:59.000Z

374

Minimising the delta test for variable selection in regression problems  

Science Conference Proceedings (OSTI)

The problem of selecting an adequate set of variables from a given data set of a sampled function becomes crucial by the time of designing the model that will approximate it. Several approaches have been presented in the literature although recent studies ... Keywords: FBS, GAs, delta test, forward-backward search, genetic algorithms, hybrid algorithms, parallel architectures, regression problems, tabu search, variable selection

Alberto Guillen; Dusan Sovilj; Amaury Lendasse; Fernando Mateo; Ignacio Rojas

2008-03-01T23:59:59.000Z

375

Problems of Cosmological Variability of Fundamental Physical Constants  

E-Print Network (OSTI)

of the fundamental constants which govern most of the common phenomena and are usually given in the handbooks. NoteProblems of Cosmological Variability of Fundamental Physical Constants #3; D. A. Varshalovich, A. Y and astronomical observations aimed at testing the possible space-time variability of fundamental physical

376

Holographic Dark Energy Model with Modified Variable Chaplygin Gas  

E-Print Network (OSTI)

In this letter we consider a correspondence between holographic dark energy and variable modified Chaplygin gas to obtain a holographic dark energy model of the universe. The corresponding potential of the scalar field has been reconstructed which describes the modified variable Chaplygin gas. The stability of the holographic dark energy in this case is also discussed.

B. C. Paul

2010-06-17T23:59:59.000Z

377

Drivers of Variability in the South Asian Monsoon  

E-Print Network (OSTI)

Drivers of Variability in the South Asian Monsoon Announcement of Opportunity Outline Bids Deadline) jointly invite outline bid proposals for research on drivers of variability in the South Asian Monsoon. For ESSO-MoES, this activity forms part of their Monsoon Mission programme (http

Edinburgh, University of

378

Fuzzy logic system for variable message signs in Kuala Lumpur  

Science Conference Proceedings (OSTI)

Intelligent Transportation Systems refer to a wide variety of advanced and emerging technology applications designed mainly to reduce traffic congestion and emissions, and to improve highway efficiency, safety, and convenience. Variable message signs ... Keywords: fuzzy controller, fuzzy logic, intelligent transportation systems, variable message signs

Arash Moradkhani Roshandeh; Majid Joshani; Othman Che Puan

2009-06-01T23:59:59.000Z

379

Development of Clemson variable-rate lateral irrigation system  

Science Conference Proceedings (OSTI)

Crops in the Southern United States are generally produced in fields which are known to have a high degree of variability in soil type, water holding capacity, infiltration rates, and other major factors which affect crop production. In these fields, ... Keywords: Instrumentation, Irrigation, Lateral-move, Precision agriculture, Variable-rate irrigation

Young J. Han; Ahmad Khalilian; Tom O. Owino; Hamid J. Farahani; Sam Moore

2009-08-01T23:59:59.000Z

380

Grothendieck bialgebras, partition lattices, and symmetric functions in noncommutative variables  

E-Print Network (OSTI)

We show that the Grothendieck bialgebra of the semi-tower of partition lattice algebras is isomorphic to the graded dual of the bialgebra of symmetric functions in noncommutative variables. In particular this isomorphism singles out a canonical new basis of the symmetric functions in noncommutative variables which would be an analogue of the Schur function basis for this bialgebra.

N. Bergeron; C. Hohlweg; M. Rosas; M. Zabrocki

2006-01-01T23:59:59.000Z

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


381

RESEARCH ARTICLE Empirical assessment of short-term variability from  

E-Print Network (OSTI)

RESEARCH ARTICLE Empirical assessment of short-term variability from utility-scale solar PV plants grid because additional system resources are required to maintain the grid's reliability. In this study-term variability; PV plant ramp rate; daily aggregate ramp rate; inverter shells *Correspondence Rob van Haaren

382

Solving connected row convex constraints by variable elimination  

Science Conference Proceedings (OSTI)

We propose an algorithm for the class of connected row convex constraints. In this algorithm, we introduce a novel variable elimination method to solve the constraints. This method is simple and able to make use of the sparsity of the problem instances. ... Keywords: Connected row convex constraints, Constraint composition, Constraint satisfaction problems, Path consistency, Variable elimination

Yuanlin Zhang; Satyanarayana Marisetti

2009-08-01T23:59:59.000Z

383

New SX Phoenicis Variables in the Globular Cluster NGC 4833  

E-Print Network (OSTI)

We report the discovery of 6 SX Phoenicis stars in the southern globular cluster NGC 4833. Images were obtained from January through June 2011 with the Southeastern Association for Research in Astronomy 0.6 meter telescope located at Cerro Tololo Interamerican Observatory. The image subtraction method of Alard & Lupton (1998)was used to search for variable stars in the cluster. We confirmed 17 previously cataloged variables by Demers & Wehlau(1977). In addition to the previously known variables we have identified 10 new variables. Of the total number of confirmed variables in our 10x10 arcmin^2 field, we classified 10 RRab variables, with a mean period of 0.69591 days, 7 RRc, with a mean period of 0.39555 days, 2 possible RRe variables with a mean period of 0.30950 days, a W Ursae Majoris contact binary, an Algol-type binary, and the 6 SX Phoenicis stars with a mean period of 0.05847 days. The periods, relative numbers of RRab and RRc variables, and Bailey diagram are indicative of the cluster being o...

Darragh, Andrew N

2012-01-01T23:59:59.000Z

384

Heart Rate Variability (HRV) in Ambient Magnetic Fields  

Science Conference Proceedings (OSTI)

In a healthy individual, the rate at which the heart beats exhibits continuous variability. In prior research at Midwest Research Institute (MRI), exposure to intermittent, but not continuous, magnetic fields was associated with alterations in heart rate variability (HRV). This report describes additional studies specifically designed to address the potential effects of magnetic field exposure on HRV.

1998-12-17T23:59:59.000Z

385

Federal Information Processing Standards  

Science Conference Proceedings (OSTI)

... Federal Information Processing Standards Publications (FIPS PUBS). ... Replacement Standards for Withdrawn FIPS on Geographic Codes.

2013-07-30T23:59:59.000Z

386

Direct process for explosives  

SciTech Connect

A direct process of making ethylenediamine dinitrate through the reaction of ethylenediamine and ammonium nitrate.

Akst, Irving B. (1032 Duncan St., Pampa, TX 79065); Stinecipher, Mary M. (324 Connie St., Los Alamos, NM 87544)

1982-01-01T23:59:59.000Z

387

Ceramic Processing.qrk  

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

Processing Processing Manufacturing Technologies The Ceramics and Glass Department devel- ops fabrication processes for ceramic compo- nents used in weapon applications. All phases of ceramic processing, from powders to fin- ished products, are addressed; including pow- der processing, blending, granulation, com- paction, sintering, grinding, metallization, and property measurements. In addition, multilay- er processing techniques are used to fabricate layered electrical devices. Our department has extensive experience in ferroelectric (PZT) and alumina ceramics, including cermet composi- tions (alumina - molybdenum composites) developed for hermetic electrical feedthrus, and alumina ceramics with buried ruthenium oxide based resistors. Capabilities * Perform process development activities for

388

Quantum Process Nonclassicality  

E-Print Network (OSTI)

We propose a definition of nonclassicality for a single-mode quantum-optical process based on its action on coherent states. If a quantum process transforms a coherent state to a nonclassical state, it is verified to be nonclassical. To identify nonclassical processes, we introduce a representation for quantum processes, called the process-nonclassicality quasiprobability distribution, whose negativities indicate nonclassicality of the process. Using this distribution, we derive a relation for predicting nonclassicality of the output states for a given input state. We experimentally demonstrate our method by considering the single-photon addition as a nonclassical process, and predicting nonclassicality of the output state for an input thermal state.

Saleh Rahimi-Keshari; Thomas Kiesel; Werner Vogel; Samuele Grandi; Alessandro Zavatta; Marco Bellini

2013-02-05T23:59:59.000Z

389

Experimental Quantum Process Discrimination  

E-Print Network (OSTI)

Discrimination between unknown processes chosen from a finite set is experimentally shown to be possible even in the case of non-orthogonal processes. We demonstrate unambiguous deterministic quantum process discrimination (QPD) of non-orthogonal processes using properties of entanglement, additional known unitaries, or higher dimensional systems. Single qubit measurement and unitary processes and multipartite unitaries (where the unitary acts non-separably across two distant locations) acting on photons are discriminated with a confidence of $\\geq97%$ in all cases.

Anthony Laing; Terry Rudolph; Jeremy L. O'Brien

2008-01-24T23:59:59.000Z

390

Stochastic simulation of pulverized coal (PC) processes  

SciTech Connect

An increasing population and electricity demand in the U.S. require capacity expansion of power systems. The National Energy Technology Laboratory (NETL), U.S. Department of Energy (DOE), has invested considerable efforts on research and development to improve the design and simulation of these power plants. Incorporation of novel process synthesis techniques and realistic simulation methodologies yield optimal flowsheet configurations and accurate estimation of their performance parameters. To provide a better estimation of such performance indicators, simulation models should predict the process behavior based on not only deterministic values of well-known input parameters but also uncertain variables associated with simulation assumptions. In this work, the stochastic simulation of a load-following pulverized coal (PC) power plant takes into account the variation of three input variables, namely, atmospheric air temperature, atmospheric air humidity, and generation load. These uncertain variables are characterized with probability density functions (pdfs) obtained from available atmospheric and electrical energy generation data. The stochastic simulation is carried out by obtaining a sample of values from the pdfs that generates a set of scenarios under which the model is run. An efficient sampling technique [Hammersley sequence sampling (HSS)] guarantees a set of scenarios uniformly distributed throughout the uncertain variable range. Then, each model run generates results on performance parameters as cycle efficiency, carbon emissions, sulfur emissions, and water consumption that are statistically analyzed after all runs are completed. Among these parameters, water consumption is of importance because an increasing demand has been observed mostly in arid regions of the country and, therefore, constrains the operability of the processes. This water consumption is significantly affected by atmospheric uncertainties. The original deterministic process model simulation was designed in Aspen Plus, and a CAPE-OPEN compliant stochastic simulation capability is employed to run the uncertainty analysis. Initially, the influences of atmospheric conditions and load change on the performance parameters are analyzed separately to understand their individual influences on the process, and then their simultaneous variation is analyzed to generate more realistic estimations of the process performance.

Salazar, J.; Diwekar, U.; Zitney, S.

2010-01-01T23:59:59.000Z

391

Indian Monsoon Depression: Climatology and Variability  

SciTech Connect

The monsoon climate is traditionally characterized by large seasonal rainfall and reversal of wind direction (e.g., Krishnamurti 1979). Most importantly this rainfall is the major source of fresh water to various human activities such as agriculture. The Indian subcontinent resides at the core of the Southeast Asian summer monsoon system, with the monsoon trough extended from northern India across Indochina to the Western Tropical Pacific (WTP). Large fraction of annual rainfall occurs during the summer monsoon season, i.e., June - August with two distinct maxima. One is located over the Bay of Bengal with rainfall extending northwestward into eastern and central India, and the other along the west coast of India where the lower level moist wind meets the Western Ghat Mountains (Saha and Bavardeckar 1976). The rest of the Indian subcontinent receives relatively less rainfall. Various weather systems such as tropical cyclones and weak disturbances contribute to monsoon rainfall (Ramage 1971). Among these systems, the most efficient rain-producing system is known as the Indian monsoon depression (hereafter MD). This MD is critical for monsoon rainfall because: (i) it occurs about six times during each summer monsoon season, (ii) it propagates deeply into the continent and produces large amounts of rainfall along its track, and (iii) about half of the monsoon rainfall is contributed to by the MDs (e.g., Krishnamurti 1979). Therefore, understanding various properties of the MD is a key towards comprehending the veracity of the Indian summer monsoon and especially its hydrological process.

Yoon, Jin-Ho; Huang, Wan-Ru (Judy)

2012-03-09T23:59:59.000Z

392

Internal Variability of the Canadian RCM’s Hydrological Variables at the Basin Scale in Quebec and Labrador  

Science Conference Proceedings (OSTI)

The effect of a regional climate model’s (RCM’s) internal variability (IV) on climate statistics of annual series of hydrological variables is investigated at the scale of 21 eastern Canada watersheds in Quebec and Labrador. The analysis is ...

Marco Braun; Daniel Caya; Anne Frigon; Michel Slivitzky

2012-04-01T23:59:59.000Z

393

TW Hya: SPECTRAL VARIABILITY, X-RAYS, AND ACCRETION DIAGNOSTICS  

SciTech Connect

The nearest accreting T Tauri star, TW Hya was intensively and continuously observed over {approx}17 days with spectroscopic and photometric measurements from four continents simultaneous with a long segmented exposure using the Chandra satellite. Contemporaneous optical photometry from WASP-S indicates a 4.74 day period was present during this time. The absence of a similar periodicity in the H{alpha} flux and the total X-ray flux which are dominated by accretion processes and the stellar corona, respectively, points to a different source of photometric variations. The H{alpha} emission line appears intrinsically broad and symmetric, and both the profile and its variability suggest an origin in the post-shock cooling region. An accretion event, signaled by soft X-rays, is traced spectroscopically for the first time through the optical emission line profiles. After the accretion event, downflowing turbulent material observed in the H{alpha} and H{beta} lines is followed by He I ({lambda}5876) broadening near the photosphere. Optical veiling resulting from the heated photosphere increases with a delay of {approx}2 hr after the X-ray accretion event. The response of the stellar coronal emission to an increase in the veiling follows {approx}2.4 hr later, giving direct evidence that the stellar corona is heated in part by accretion. Subsequently, the stellar wind becomes re-established. We suggest a model that incorporates the dynamics of this sequential series of events: an accretion shock, a cooling downflow in a supersonically turbulent region, followed by photospheric and later, coronal heating. This model naturally explains the presence of broad optical and ultraviolet lines, and affects the mass accretion rates determined from emission line profiles.

Dupree, A. K.; Brickhouse, N. S.; Cranmer, S. R.; Luna, G. J. M.; Schneider, E. E. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Bessell, M. S. [Australian National Observatory, Mount Stromlo Observatory, Canberra, ACT 2611 (Australia); Bonanos, A. [Institute of Astronomy and Astrophysics, National Observatory of Athens, 15236 Athens (Greece); Crause, L. A. [South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape Town (South Africa); Lawson, W. A. [School of Physical, Environmental, and Math Sciences, University of New South Wales, Canberra, ACT 2600 (Australia); Mallik, S. V. [Indian Institute of Astrophysics, Bangalore 560034 (India); Schuler, S. C. [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)

2012-05-01T23:59:59.000Z

394

Three-mode Gaussian states in quantum information with continuous variables  

E-Print Network (OSTI)

The structural aspects of tripartite entanglement in three-mode Gaussian states of continuous variable systems have been studied in [Adesso G, Serafini A and Illuminati F 2006 Phys. Rev. A {\\bf 73} 032345]. Here we focus our attention on the usefulness of such states in the context of realistic processing of continuous-variable quantum information. We introduce and discuss in detail several examples of pure and mixed three-mode states that stand out for their informational and/or entanglement properties. We then describe practical schemes to engineer such states with linear optics. In particular, we introduce a simple procedure -- based on passive optical elements -- to produce pure three-mode Gaussian states with {\\em arbitrary} entanglement structure (upon availability of an initial single-mode squeezed state). We analyze in detail the properties of distributed entanglement, showing that the promiscuity of entanglement sharing is a feature peculiar to symmetric Gaussian states that survives even in the pres...

Adesso, G; Serafini, A; Adesso, Gerardo; Illuminati, Fabrizio; Serafini, Alessio

2006-01-01T23:59:59.000Z

395

Plate Fin Heat Exchanger Model with Axial Conduction and Variable Properties  

E-Print Network (OSTI)

Future superconducting radio frequency (SRF) cavities, as part of Project X at Fermilab, will be cooled to superfluid helium temperatures by a cryogenic distribution system supplying cold supercritical helium. To reduce vapor fraction during the final Joule-Thomson (J-T) expansion into the superfluid helium cooling bath, counter-flow, plate-fin heat exchangers will be utilized. Due to their compact size and ease of fabrication, plate-fin heat exchangers are an effective option. However, the design of compact and high-effectiveness cryogenic heat exchangers operating at liquid helium temperatures requires consideration of axial heat conduction along the direction of flow, in addition to variable fluid properties. Here we present a numerical model that includes the effects of axial conduction and variable properties for a plate fin heat exchanger. The model is used to guide design decisions on heat exchanger material choice and geometry. In addition, the J-T expansion process is modeled with the heat exchanger ...

Hansen, B J; Klebaner, A; 10.1063/1.4706971

2012-01-01T23:59:59.000Z

396

Improving Performance of Power Systems with Large-scale Variable Generation Additions  

Science Conference Proceedings (OSTI)

A power system with large-scale renewable resources, like wind and solar generation, creates significant challenges to system control performance and reliability characteristics because of intermittency and uncertainties associated with variable generation. It is important to quantify these uncertainties, and then incorporate this information into decision-making processes and power system operations. This paper presents three approaches to evaluate the flexibility needed from conventional generators and other resources in the presence of variable generation as well as provide this flexibility from a non-traditional resource – wide area energy storage system. These approaches provide operators with much-needed information on the likelihood and magnitude of ramping and capacity problems, and the ability to dispatch available resources in response to such problems.

Makarov, Yuri V.; Etingov, Pavel V.; Samaan, Nader A.; Lu, Ning; Ma, Jian; Subbarao, Krishnappa; Du, Pengwei; Kannberg, Landis D.

2012-07-22T23:59:59.000Z

397

Intelligent Switching System Methodology and Its Application in Complex Process Control System  

Science Conference Proceedings (OSTI)

The switching system can be viewed as a kind of hybrid systems because it with both continuous state variables and discrete state variables. Viewing the controller as hierarchical, then the switch strategy belongs to the higher hierarchy. It represents ... Keywords: intelligent switching system, hybrid systems, fuzzy logic, complex process control, coke oven

Junwei Gao; Yangdong Ye; Tianyun Shi; Qiuhua Jiang; Limin Jia

2002-09-01T23:59:59.000Z

398

Climate variability in a coupled GCM. Part II: The Indian Ocean and monsoon  

SciTech Connect

We have investigated the seasonal cycle and the interannual variability of the tropical Indian Ocean circulation and the Indian summer monsoon simulated by a coupled ocean-atmosphere general circulation model in a 26-year integration. Although the model exhibits significant climate drift, overall, the coupled GCM simulates realistically the seasonal changes in the tropical Indian Ocean and the onset and evolution of the Indian summer monsoon. The amplitudes of the seasonal changes, however, are underestimated. The coupled GCM also simulates considerable interannual variability in the tropical Indian Ocean circulation, which is partly related to the El Nino/Southern Oscillation phenomenon and the associated changes in the Walker circulation. Changes in the surface wind stress appear to be crucial in forcing interannual variations in the Indian Ocean SST. As in the Pacific Ocean, the net surface heat flux acts as a negative feedback on the SST anomalies. The interannual variability in monsoon rainfall, simulated by the coupled GCM, is only about half as strong as observed. The reason for this is that the simulated interannual variability in the Indian monsoon appears to be related to internal processes within the atmosphere only. In contrast, an investigation based on observations shows a clear lead-lag relationship between interannual variations in the monsoon rainfall and tropical Pacific SST anomalies. Furthermore, the atmospheric GCM also fails to reproduce this lead-lag relationship between monsoon rainfall and tropical Pacific SST when run in a stand-alone integration with observed SSTs prescribed during the period 1970-1988. These results indicate that important physical processes relating tropical Pacific SST to Indian monsoon rainfall are not adequately modeled in our atmospheric GCM. Monsoon rainfall predictions appear therefore premature. 24 refs., 13 figs, 2 tabs.

Latif, M.; Sterl, A.; Assenbaum, M.; Junge, M.M.; Maier-Reimer, E. [Max-Planck-Institut fuer Meteorologie, Hamburg (Germany)] [Max-Planck-Institut fuer Meteorologie, Hamburg (Germany)

1994-10-01T23:59:59.000Z

399

ENSEMBLE VARIABILITY OF NEAR-INFRARED-SELECTED ACTIVE GALACTIC NUCLEI  

Science Conference Proceedings (OSTI)

We present the properties of the ensemble variability V for nearly 5000 near-infrared active galactic nuclei (AGNs) selected from the catalog of Quasars and Active Galactic Nuclei (13th Edition) and the SDSS-DR7 quasar catalog. From three near-infrared point source catalogs, namely, Two Micron All Sky Survey (2MASS), Deep Near Infrared Survey (DENIS), and UKIDSS/LAS catalogs, we extract 2MASS-DENIS and 2MASS-UKIDSS counterparts for cataloged AGNs by cross-identification between catalogs. We further select variable AGNs based on an optimal criterion for selecting the variable sources. The sample objects are divided into subsets according to whether near-infrared light originates by optical emission or by near-infrared emission in the rest frame; and we examine the correlations of the ensemble variability with the rest-frame wavelength, redshift, luminosity, and rest-frame time lag. In addition, we also examine the correlations of variability amplitude with optical variability, radio intensity, and radio-to-optical flux ratio. The rest-frame optical variability of our samples shows negative correlations with luminosity and positive correlations with rest-frame time lag (i.e., the structure function, SF), and this result is consistent with previous analyses. However, no well-known negative correlation exists between the rest-frame wavelength and optical variability. This inconsistency might be due to a biased sampling of high-redshift AGNs. Near-infrared variability in the rest frame is anticorrelated with the rest-frame wavelength, which is consistent with previous suggestions. However, correlations of near-infrared variability with luminosity and rest-frame time lag are the opposite of these correlations of the optical variability; that is, the near-infrared variability is positively correlated with luminosity but negatively correlated with the rest-frame time lag. Because these trends are qualitatively consistent with the properties of radio-loud quasars reported by some previous studies, most of our sample objects are probably radio-loud quasars. Finally, we also discuss the negative correlations seen in the near-infrared SFs.

Kouzuma, S. [School of International Liberal Studies, Chukyo University, Toyota 470-0393 (Japan); Yamaoka, H., E-mail: skouzuma@lets.chukyo-u.ac.jp, E-mail: yamaoka@phys.kyushu-u.ac.jp [Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)

2012-03-01T23:59:59.000Z

400

First National Climate Assessment: Background and Process  

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

Background and Process Print E-mail Background and Process Print E-mail Workshops of the First National Climate Assessment In February 1997, the U.S. Global Change Research Program and the Office of Science and Technology Policy initiated a series of Regional Climate Change Workshops with the goal of starting the process of examining the vulnerabilities of regions of the United States to climate variability and climate change. What was initially intended to be three or four workshops developed into a series of twenty, covering every state and territory of the United States. The workshops span from May 1997 to September 1998 and represented the first step in conducting a regional assessment. Each workshop was sponsored by one or more government agencies,and was carried out by coordinators from local institutions. For details on each workshop, including its geographic coverage, see:

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


401

Process Deviation Log  

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

Process Deviation Log 09_0730 Process Deviation Log 09_0730 EOTA - Business Form Document Title: P-010, Process Deviation Process Document Number: Process Deviation Log EOTA Employees Melissa Otero N/A Referenced Documents: Parent Document: F-014 Rev. 11_0316 Approvers: Melissa Otero Document Owner: Elizabeth Sousa Backup Owner: Notify of Changes: A 09_0730 11_0316 Revision History: Rev. Description of Change Intitial Release. Revised log to reflect date/date range that PD is in effect. Removed drop-down menu items. Added ECD, Extension Date and Closed Column. F-014 Process Deviation Log 09_0730 Process Deviation # Date Requestor Departme nt Process # Has PD Occurred ? (Y/N) CAR/PAR # Distributio n Date Estimated Closure Date Extension Date Closed Date Comment PD-001 PD-002 PD-003 PD-004 PD-005 PD-006 PD-007 PD-008 PD-009

402

Milestone Plan Process Improvement  

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

Milestone Plan Process Improvement Milestone Plan Process Improvement Milestone Plan Process Improvement Background In response to our community's concern over the milestone plan (MP) process within the system, the STRIPES Project Office initiated an in-depth evaluation of the required steps and issues surrounding this process. We concluded that the MP process could be improved for most users by tuning the system configuration. With the approval of both the STRIPES Executive Steering Committee and the STRIPES Project Office, we launched the MP Process Improvement Initiative. After many meetings with members of the STRIPES Team and Working Group, we are ready to "go-live" with this initiative. On October 1 st , 2012 the new MP process will be implemented for use by most field offices.

403

Process Contaminants (3-MCPD)  

Science Conference Proceedings (OSTI)

General information on process contaminants(3-MCPD). Reference list included. Process Contaminants (3-MCPD) 3-MCPD 2-diol 3-MCPD 3-MCPD Esters 3-monochloropropane-1 acid analysis aocs april articles certified chemists chloropropanediol contaminants deter

404

Processing Division Student Award  

Science Conference Proceedings (OSTI)

Awarded to a graduate student researching oilseed handling preparation and extraction, refining and processing, oil products and packaging, feed ingredients, by-product utilization, safety and health, and environmental concerns. Processing Division Student

405

The Product Creation Process  

E-Print Network (OSTI)

The Product Creation Process is described in its context. A phased model is shown, as many organisations use such a model as blueprint. The operational organisation of the product creation process is discussed, especially the role of the operational leader.

Gerrit Muller

1999-01-01T23:59:59.000Z

406

Resources Process Contaminants  

Science Conference Proceedings (OSTI)

General Information on process contaminants(3-MCPD). Reference list included. Resources Process Contaminants 3-MCPD 2-diol 3-MCPD 3-MCPD Esters 3-monochloropropane-1 acid analysis aocs april articles certified chemists chloropropanediol contaminants dete

407

Gas-separation process  

DOE Patents (OSTI)

A process for separating condensable organic components from gas streams. The process makes use of a membrane made from a polymer material that is glassy and that has an unusually high free volume within the polymer material.

Toy, Lora G. (San Francisco, CA); Pinnau, Ingo (Palo Alto, CA); Baker, Richard W. (Palo Alto, CA)

1994-01-01T23:59:59.000Z

408

Optimizing IT process management  

Science Conference Proceedings (OSTI)

In this paper, the author discusses some key concepts in IT process management. The paper also includes the recommendations in these following aspects: team organization, physical environment, project selection, politics, organizational communication, ... Keywords: IT process management

Tony Tony Lee

2010-07-01T23:59:59.000Z

409

Nonconforming Material Process  

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

11 Nonconforming Material / Product Process 11_0304 Page 1 of 6 11 Nonconforming Material / Product Process 11_0304 Page 1 of 6 EOTA - Business Process Document Title: Nonconforming Material / Product Process Document Number: P-011 Rev. 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): F-015 Nonconformance Report, REG-003 Record Register, ISDP-002 Training Production Process P-011 Nonconforming Material / Product Process 11_0304 Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 08_0416 Added verbiage CAR/PAR/IO to Step 2 P-011 Nonconforming Material / Product Process 11_0304 Page 3 of 6 I. Purpose To establish the process for nonconforming material to be identified, segregated and dispositioned to prevent its unintended

410

Materials Processing Fundamentals  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium, Materials Processing Fundamentals. Sponsorship, The Minerals, Metals ...

411

Chemical Engineering & Processing Thermodynamics ...  

Science Conference Proceedings (OSTI)

... Engineering & Processing Thermodynamics Information at ... Phase Equilibrium Data (01/30 ... Connecting Thermodynamic and Dynamic Properties of ...

2010-09-24T23:59:59.000Z

412

Direct process for explosives  

DOE Patents (OSTI)

A direct process of making ethylenediamine dinitrate through the reaction of ethylenediamine and ammonium nitrate is described.

Akst, I.B.; Stinecipher, M.M.

1982-10-12T23:59:59.000Z

413

Materials Processing Fundamentals  

Science Conference Proceedings (OSTI)

Symposium, Materials Processing Fundamentals ... to be covered in the symposium are all aspects of the fundamentals, synthesis, analysis, design, monitoring, ...

414

Surface Processing & Mechanics Group  

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

Contact Directory Staff Ceramic Machining Composites Coatings Powder Metallurgy Thermodynamics Tribology Related Links HTML Comments Welcome to the Surface Processing &...

415

Separation Processes, Second Edition  

E-Print Network (OSTI)

process for uranium-isotope enrichment. distillation columnenrichment they can provide, for the recovery of 235U from natural uranium

King, C. Judson

1980-01-01T23:59:59.000Z

416

Sol-Gel Process  

Science Conference Proceedings (OSTI)

...hypercritical evacuation. These gels are called aerogels (Ref 199). Aerogels are processed by increasing the temperature and

417

Processing and Properties  

Science Conference Proceedings (OSTI)

Ceramic Matrix Composites: Processing and Properties ... Plasma sprayed Yittria Stabilized Zirconia (YSZ) coating is most commonly used in cylindrical liners, ...

418

Fuel gas conditioning process  

DOE Patents (OSTI)

A process for conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas, so that it can be used as combustion fuel to run gas-powered equipment, including compressors, in the gas field or the gas processing plant. Compared with prior art processes, the invention creates lesser quantities of low-pressure gas per unit volume of fuel gas produced. Optionally, the process can also produce an NGL product.

Lokhandwala, Kaaeid A. (Union City, CA)

2000-01-01T23:59:59.000Z

419

PARS II Process Document- Submitting & Processing Email as Offical...  

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

PARS II Process Document- Submitting & Processing Email as Offical Project Action Approval Document PARS II Process Document- Submitting & Processing Email as Offical Project...

420

Decision Superiority Process Model  

Science Conference Proceedings (OSTI)

Decision superiority is achieved not just by acquiring and assessing the right information, but by translating it into actionable knowledge that can be exploited in the decision making process. Achieving decision superiority is necessary, because the ... Keywords: context-goal alternatives, decision making process, decision superiority, process model

Barbara Sorensen; Azad M. Madni; Carla C. Madni

2008-12-01T23:59:59.000Z

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


421

Radioactive Liquid Processing Guidelines  

Science Conference Proceedings (OSTI)

This report presents guidance for utility liquid radwaste processing program managers. The document is a summation of utility and vendor processing experience, and is intended for use as a tool to enhance liquid radwaste processing programs. Utilization of this information will result in optimized system performance, and a reduction in waste volumes and program costs.

2005-11-22T23:59:59.000Z

422

Adaptation to Climate Variability and Change: A Guidance Manual for  

Open Energy Info (EERE)

Adaptation to Climate Variability and Change: A Guidance Manual for Adaptation to Climate Variability and Change: A Guidance Manual for Development Planning Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Adaptation to Climate Variability and Change: A Guidance Manual for Development Planning Agency/Company /Organization: United States Agency for International Development Sector: Climate, Energy, Land, Water Topics: Adaptation Resource Type: Guide/manual Website: pdf.usaid.gov/pdf_docs/PNADJ990.pdf References: Adaptation to Climate Variability and Change: A Guidance Manual for Development Planning[1] "This Adaptation Guidance Manual is the first of several tools we are developing to assist planners and stakeholders as they cope with a changing climate. As we work with Missions to apply the methods described here, we

423

Land Surface Controls on Hydroclimatic Means and Variability  

Science Conference Proceedings (OSTI)

Hydroclimatic means and variability are determined in large part by the control of soil moisture on surface moisture fluxes, particularly evapotranspiration and runoff. This control is examined here using a simple water balance model and ...

Randal D. Koster; Sarith P. P. Mahanama

2012-10-01T23:59:59.000Z

424

Multiple instances and symbolic variables in executable sequence charts  

Science Conference Proceedings (OSTI)

We extend live sequence charts (LSCs), a highly expressive variant of sequence diagrams, and provide the extension with an executable semantics. The extension involves support for instances that can bind to multiple objects and symbolic variables that ...

Rami Marelly; David Harel; Hillel Kugler

2002-11-01T23:59:59.000Z

425

South Atlantic Multidecadal Variability in the Climate System Model  

Science Conference Proceedings (OSTI)

Strong multidecadal variability is detected in a 300-yr integration of the NCAR Climate System Model in the South Atlantic region, through the application of two signal recognition techniques: the multitaper method and singular spectrum analysis. ...

Ilana Wainer; Silvia A. Venegas

2002-06-01T23:59:59.000Z

426

Market Design Simulations with Variable Energy Resources (VERs) (Presentation)  

Science Conference Proceedings (OSTI)

Presented at the FERC Technical Conference, 29 June 2011, Washington, D.C. This presentation describes NREL research regarding variable generation resources, operating reserves, unit commitment, economic dispatch, and introduces a new and novel modeling tool called 'FESTIV.'

Ela, E.

2011-06-01T23:59:59.000Z

427

Structure and Variability of the Kuroshio Current in Tokara Strait  

Science Conference Proceedings (OSTI)

Four years of mooring array measurements in Tokara Strait, south of Kyushu, Japan, from 1992 to 1996 are used to analyze the structure and temporal variability of the Kuroshio Current. The mean Kuroshio current in Tokara Strait shows a nearly ...

Ming Feng; Humio Mitsudera; Yasushi Yoshikawa

2000-09-01T23:59:59.000Z

428

A Global Numerical Weather Prediction Model with Variable Resolution  

Science Conference Proceedings (OSTI)

A conformal transformation suggested by F. Schmidt is followed to implement a global spectral model with variable resolution. A conformal mapping is defined from a physical sphere (like the earth) to a transformed (computational) sphere. The ...

Vivek Hardiker

1997-01-01T23:59:59.000Z

429

Orthobaric Density: A Thermodynamic Variable for Ocean Circulation Studies  

Science Conference Proceedings (OSTI)

A new density variable, empirically corrected for pressure, is constructed. This is done by first fitting compressibility (or sound speed) computed from global ocean datasets to an empirical function of pressure and in situ density (or specific ...

Roland A. de Szoeke; Scott R. Springer; David M. Oxilia

2000-11-01T23:59:59.000Z

430

Sliding mode control strategy for variable speed wind turbine  

Science Conference Proceedings (OSTI)

The efficiency of the wind power conversions systems can be greatly improved using an appropriate control algorithm. In this work, a robust control for variable speed wind power generation that incorporates a doubly feed induction generator is described. ...

Oscar Barambones; Jose Maria Gonzalez De Durana

2009-09-01T23:59:59.000Z

431

Results from the NREL Variable-Speed Test bed  

DOE Green Energy (OSTI)

The NREL Variable-Speed Test bed turbine has been used to examine the performance and controllability of a variable-speed, variable-pitch turbine. Control strategies that eliminate drive-train torque fluctuations in high winds have been published before and example data are given here. The energy capture of a variable-speed wind turbine depends in part on its ability to successfully operate at the peak of the C{sub p}-{lambda} curve. The losses associated with the inability of the rotor to stay exactly on top of the curve at all have been found and quantified. New control strategies for improving energy capture in moderate winds are also proposed. The potential exists to improve overall energy capture by 5% or more.

Fingersh, L.J.; Carlin, P.W. [National Renewable Energy Lab., Golden, CO (United States). National Wind Technology Center

1997-11-01T23:59:59.000Z

432

Temperature and Salinity Variability in Heterogeneous Oceanic Convection  

Science Conference Proceedings (OSTI)

In regions of active oceanic convection, such as the Labrador Sea, small- and mesoscale spatial variability is observed in the temperature and salinity fields (T and S). Often T and S structures are “density-compensated,” with the density ...

Sonya Legg; James C. McWilliams

2000-06-01T23:59:59.000Z

433

Simulating Random Natural Variability in Time-Varying Atmospheric...  

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

Natural Variability in Time-Varying Atmospheric Concentrations of Toxic Gas from Pipeline Ruptures Speaker(s): David J. Wilson Date: February 4, 2004 - 12:00pm Location: Bldg....

434

Enhanced MJO-like Variability at High SST  

Science Conference Proceedings (OSTI)

The authors report a significant increase in Madden–Julian oscillation (MJO)–like variability in a superparameterized version of the NCAR Community Atmosphere Model run with high sea surface temperatures (SSTs). A series of aquaplanet simulations ...

Nathan P. Arnold; Zhiming Kuang; Eli Tziperman

2013-02-01T23:59:59.000Z

435

Central-West Argentina Summer Precipitation Variability and Atmospheric Teleconnections  

Science Conference Proceedings (OSTI)

The interannual-to-multidecadal variability of central-west Argentina (CWA) summer (October–March) precipitation and associated tropospheric circulation are studied in the period 1900–2010. Precipitation shows significant quasi cycles with periods ...

Eduardo A. Agosta; Rosa H. Compagnucci

2012-03-01T23:59:59.000Z

436

Antarctic Bottom Water Variability in a Coupled Climate Model  

Science Conference Proceedings (OSTI)

The natural variability of the Weddell Sea variety of Antarctic Bottom Water (AABW) is examined in a long-term integration of a coupled climate model. Examination of passive tracer concentrations suggests that the model AABW is predominantly ...

Agus Santoso; Matthew H. England

2008-09-01T23:59:59.000Z

437

Separating forced from chaotic climate variability over the past millennium  

Science Conference Proceedings (OSTI)

Reconstructions of past climate show notable temperature variability over the past millennium, with relatively warm conditions during the ‘Medieval Climate Anomaly’ (MCA) and a relatively cold ‘Little Ice Age’ (LIA). We use multi-model simulations ...

Andrew Schurer; Gabriele Hegerl; Michael E. Mann; Simon F. B. Tett; Steven J. Phipps

438

Projection of Climate Change onto Modes of Atmospheric Variability  

Science Conference Proceedings (OSTI)

Two possible interpretations of forced climate change view it as projecting, either linearly or nonlinearly, onto the dominant modes of variability of the climate system. An evaluation of these two interpretations is performed using annual mean ...

DáithíA. Stone; Andrew J. Weaver; Ronald J. Stouffer

2001-09-01T23:59:59.000Z

439

Zonal Jet Structure and the Leading Mode of Variability  

Science Conference Proceedings (OSTI)

An observational analysis of the Northern Hemisphere circulation during winter reveals that the leading mode of variability depends on longitude. In particular, the first EOF of the zonal-mean circulation differs over the Atlantic and Pacific ...

Scott J. Eichelberger; Dennis L. Hartmann

2007-10-01T23:59:59.000Z

440

The Choice of Variable for Atmospheric Moisture Analysis  

Science Conference Proceedings (OSTI)

The implications of using different control variables for the analysis of moisture observations in a global atmospheric data assimilation system are investigated. A moisture analysis based on either mixing ratio or specific humidity is prone to ...

Dick P. Dee; Arlindo M. da Silva

2003-01-01T23:59:59.000Z

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


441

Decadal Variability of Two Oceans and an Atmosphere  

Science Conference Proceedings (OSTI)

A model of the midlatitude, large-scale interaction between the upper ocean and the troposphere is used to illustrate possible mechanisms of connection between the decadal variability in the North Atlantic and in the North Pacific. The two ocean ...

Blanca Gallego; Paola Cessi

2001-07-01T23:59:59.000Z

442

Spatial Distribution of Surface Fluxes Estimated from Remotely Sensed Variables  

Science Conference Proceedings (OSTI)

This study relates surface fluxes to remotely sensed variables over well-defined variations of surface wetness and vegetation. The surface fluxes are estimated from repeated Twin Otter aircraft flights at 33 m above the surface after correcting ...

Jielun Sun; L. Mahrt

1994-11-01T23:59:59.000Z

443

Spatial Variability and Interpolation of Stochastic Weather Simulation Model Parameters  

Science Conference Proceedings (OSTI)

The spatial variability of 58 precipitation and temperature parameters from the “generation of weather elements for multiple applications” (GEM) weather generator has been investigated over a region of significant complexity in topography and ...

Gregory L. Johnson; Christopher Daly; George H. Taylor; Clayton L. Hanson

2000-06-01T23:59:59.000Z

444

Evolution Dynamics of Tropical Ocean-Atmosphere Annual Cycle Variability  

Science Conference Proceedings (OSTI)

The structure of ocean-atmosphere annual cycle variability is extracted from the revised Comprehensive Ocean-Atmosphere Data Set SSTs, surface winds, and the latent heat (LH) and net shortwave (SW) surface fluxes using the covariance-based ...

Sumant Nigam; Yi Chao

1996-12-01T23:59:59.000Z

445

Global Characteristics of Stream Flow Seasonality and Variability  

Science Conference Proceedings (OSTI)

Monthly stream flow series from 1345 sites around the world are used to characterize geographic differences in the seasonality and year-to-year variability of stream flow. Stream flow seasonality varies regionally, depending on the timing of ...

Michael D. Dettinger; Henry F. Diaz

2000-08-01T23:59:59.000Z

446

Evaluation of the temporal scaling variability in forecasting ground ...  

Science Conference Proceedings (OSTI)

Aug 9, 2012 ... temporal scaling behavior and the data distribution over different .... them is not significant after introducing a new variable, the latter is ... Iberian Peninsula ( warm temperatures and high solar radiation) ..... New York: Springer.

447

Does Global Warming Cause Intensified Interannual Hydroclimate Variability?  

Science Conference Proceedings (OSTI)

The idea that global warming leads to more droughts and floods has become commonplace without clear indication of what is meant by this statement. Here, the authors examine one aspect of this problem and assess whether interannual variability of ...

Richard Seager; Naomi Naik; Laura Vogel

2012-05-01T23:59:59.000Z

448

Modes of Interannual and Interdecadal Variability of Pacific SST  

Science Conference Proceedings (OSTI)

The multichannel singular spectrum analysis has been used to characterize the spatio–temporal structures of interdecadal and interannual variability of SST over the Pacific Ocean from 20°S to 58°N. Using the Comprehensive Ocean–Atmosphere Data ...

Xuebin Zhang; Jian Sheng; Amir Shabbar

1998-10-01T23:59:59.000Z

449

Biennial Variability in an Atmospheric General Circulation Model  

Science Conference Proceedings (OSTI)

Recent observational analyses have indicated that tropospheric quasi-biennial oscillations (QBs) may play a fundamental role in regulating the timing and strength of El Nińo and the Southern Oscillation. The biennial variability is examined in ...

Michael A. Alexander; Klaus M. Weickmann

1995-03-01T23:59:59.000Z

450

Interannual Variability in the Eastern Subtropical North Pacific Ocean  

Science Conference Proceedings (OSTI)

Interannual variability in the eastern subtropical North Pacific Ocean is investigated using the Naval Research Laboratory Layered Ocean Model (NLOM). Emphasis is placed on examining the nature of westward propagating Rossby waves and their ...

Alan P. Leonardi; Steven L. Morey; James J. O'Brien

2002-06-01T23:59:59.000Z

451

Confidential Direct Communications: A Quantum Approach Using Continuous Variables  

E-Print Network (OSTI)

We consider the problem of privacy in direct communications, showing how quantum mechanics can be useful to guarantee a certain level of confidentiality. In particular, we review a continuous variable approach recently ...

Mancini, Stefano

452

Multidecadal Variability in North Atlantic Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

Recent increases in Atlantic basin tropical cyclone activity since 1995 and the associated destructive U.S. landfall events in 2004 and 2005 have generated considerable interest into why there has been such a sharp upturn. Natural variability, ...

Philip J. Klotzbach; William M. Gray

2008-08-01T23:59:59.000Z

453

Generation of Picosecond Electron-bunch Trains with Variable...  

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

GENERATION OF PICOSECOND ELECTRON-BUNCH TRAINS WITH VARIABLE SPACING USING A MULTI-PULSE PHOTOCATHODE LASER M. Conde 1 , W. Gai 1 , C. Jing 1,2 , R. Konecny 1 , W. Liu 1 , D....

454

Heart rate variability in mice with coronary heart disease  

E-Print Network (OSTI)

Heart rate variability (HRV), the beat-to-beat fluctuation of the heart rate, is a non-invasive test that measures the autonomic regulation of the heart. Assessment of HRV has been shown to predict the risk of mortality ...

Zapanta, Laurence (Laurence F.)

2005-01-01T23:59:59.000Z

455

Dynamics of Interdecadal Climate Variability: A Historical Perspective  

Science Conference Proceedings (OSTI)

The emerging interest in decadal climate prediction highlights the importance of understanding the mechanisms of decadal to interdecadal climate variability. The purpose of this paper is to provide a review of our understanding of interdecadal ...

Zhengyu Liu

2012-03-01T23:59:59.000Z

456

Interannual Variability of Trace Gases in the Subtropical Winter Stratosphere  

Science Conference Proceedings (OSTI)

Measurements of water vapor and methane from the Halogen Occultation Experiment instrument on board the Upper Atmosphere Research Satellite are used to study the interannual variability of trace gas distributions in the atmosphere. Particular ...

L. J. Gray; J. M. Russell Jr.

1999-04-01T23:59:59.000Z

457

Classification of Regional Climate Variability in the State of California  

Science Conference Proceedings (OSTI)

A novel approach is presented to objectively identify regional patterns of climate variability within the state of California using principal component analysis on monthly precipitation and temperature data from a network of 195 climate stations ...

John T. Abatzoglou; Kelly T. Redmond; Laura M. Edwards

2009-08-01T23:59:59.000Z

458

Modeling Semidiurnal Internal Tide Variability in the Southern California Bight  

Science Conference Proceedings (OSTI)

The Regional Oceanic Modeling System (ROMS) is applied in a nested configuration with realistic forcing to the Southern California Bight (SCB) to analyze the variability in semidiurnal internal wave generation and propagation. The SCB has a ...

M. C. Buijsman; Y. Uchiyama; J. C. McWilliams; C. R. Hill-Lindsay

2012-01-01T23:59:59.000Z

459

Intraseasonal Variability in a Barotropic Model with Seasonal Forcing  

Science Conference Proceedings (OSTI)

It has recently been suggested that oscillatory topographic instability could contribute to low-frequency variability over the Northern Hemisphere midlatitudes. A barotropic potential vorticity model, with a hierarchy of forcing and topography ...

Christopher M. Strong; Fei-Fei Jin; Michael Ghil

1993-09-01T23:59:59.000Z

460

Joint Variability of Global Runoff and Global Sea Surface Temperatures  

Science Conference Proceedings (OSTI)

Global land surface runoff and sea surface temperatures (SST) are analyzed to identify the primary modes of variability of these hydroclimatic data for the period 1905–2002. A monthly water-balance model first is used with global monthly ...

Gregory J. McCabe; David M. Wolock

2008-08-01T23:59:59.000Z

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


461

Intraseasonal Variability of the West African Monsoon and Atlantic ITCZ  

Science Conference Proceedings (OSTI)

Intraseasonal variability of boreal summer rainfall and winds in tropical West Africa and the east Atlantic is examined using daily Tropical Rainfall Measuring Mission (TRMM) precipitation and the NCEP–NCAR reanalysis during 1998–2006. ...

Eric D. Maloney; Jeffrey Shaman

2008-06-01T23:59:59.000Z

462

North Atlantic Subpolar Gyre Surface Variability (1895–2009)  

Science Conference Proceedings (OSTI)

Surface temperature, salinity, and density are examined in the northeastern part of the North Atlantic subpolar gyre over the last 115 years of measurements. This region presents coherent variability in space but also between different seasons, ...

G. Reverdin

2010-09-01T23:59:59.000Z

463

Decadal Climate Variability: Is There a Tidal Connection?  

Science Conference Proceedings (OSTI)

A possible connection between oceanic tides and climate variability arises from modulations in tidally induced vertical mixing. The idea is reexamined here with emphasis on near-decadal time scales. Occasional extreme tides caused by unusually ...

Richard D. Ray

2007-07-01T23:59:59.000Z

464

Climatic Variability at Ten Stations Across the United States  

Science Conference Proceedings (OSTI)

Ten stations are chosen for a study of climatic variability in the continental United States, using as the main criteria good geographical distribution, long-period records (since before 1900), and available daily, monthly and annual values of ...

Kevin C. Vining; John F. Griffiths

1985-04-01T23:59:59.000Z

465

Interannual Modes of Variability in Atmospheric Angular Momentum  

Science Conference Proceedings (OSTI)

The interannual variability of atmospheric angular momentum over a 26-yr period is studied regionally using monthly analyses of zonal winds derived from the global rawinsonde network. Variations in zonal-mean momentum, filtered to emphasize ...

Robert X. Black; David A. Salstein; Richard D. Rosen

1996-11-01T23:59:59.000Z

466

Mesoscale Weather Effects of Variable Snow Cover over Northeast Colorado  

Science Conference Proceedings (OSTI)

Data from the PROFS (Program for Regional Observing and Forecasting Services) surface mesonetwork have been used to document the effect of variable snow cover on atmospheric boundary layer properties cloudiness and weather conditions over north ...

Richard H. Johnson; George S. Young; James J. Toth; Raymond M. Zehr

1984-06-01T23:59:59.000Z

467

Simulation of North Atlantic Low-Frequency SST Variability  

Science Conference Proceedings (OSTI)

The role of atmospheric circulation anomalies in generating midlatitude sea surface temperature (SST) variability is investigated by means of ocean general circulation model (OGCM) experiments, in which observed winds are prescribed during the ...

Ute Luksch

1996-09-01T23:59:59.000Z

468

Global Variability of the Wavenumber Spectrum of Oceanic Mesoscale Turbulence  

Science Conference Proceedings (OSTI)

The wavenumber spectra of sea surface height from satellite altimeter observations have revealed complex spatial variability that cannot be explained by a universal theory of mesoscale turbulence. Near the edge of the core regions of high eddy ...

Yongsheng Xu; Lee-Lueng Fu

2011-04-01T23:59:59.000Z

469

Impact of Gravity Waves on Marine Stratocumulus Variability  

Science Conference Proceedings (OSTI)

The impact of gravity waves on marine stratocumulus is investigated using a large-eddy simulation model initialized with sounding profiles composited from the Variability of American Monsoon Systems (VAMOS) Ocean–Cloud–Atmosphere–Land Study ...

Qingfang Jiang; Shouping Wang

2012-12-01T23:59:59.000Z

470

Interannual and Interdecadal Variability of Thailand Summer Monsoon Season  

Science Conference Proceedings (OSTI)

Summer monsoon rains are a critical factor in Thailand’s water resources and agricultural planning and management. In fact, they have a significant impact on the country’s economic health. Consequently, understanding the variability of the summer ...

Nkrintra Singhrattna; Balaji Rajagopalan; K. Krishna Kumar; Martyn Clark

2005-06-01T23:59:59.000Z

471

Short-Term Climatic Variability of the Arctic  

Science Conference Proceedings (OSTI)

The circulation of the Arctic atmosphere undergoes large fluctuations about its monthly and annual means. The statistics of Arctic sea level pressure and temperature are evaluated in order to place Arctic atmospheric variability into the context ...

John E. Walsh; William L. Chapman

1990-02-01T23:59:59.000Z

472

Variable Speed Fan Retrofits for Computer Room Air Conditioners  

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

Variable-Speed Fan Retrofits for Computer-Room Air Conditioners Prepared for the U.S. Department of Energy Federal Energy Management Program Technology Case Study Bulletin By...

473

Groundwater Constraints on Simulated Transpiration Variability over Southeastern Australian Forests  

Science Conference Proceedings (OSTI)

A land surface scheme with and without groundwater–vegetation interactions is used to explore the impact of rainfall variability on transpiration over drought-vulnerable regions of southeastern Australia. The authors demonstrate that if ...

M. Decker; A. J. Pitman; J. P. Evans

2013-04-01T23:59:59.000Z

474

Managing forecast variability in a build-to-order environment  

E-Print Network (OSTI)

In any production environment, managing demand variability is a delicate balancing act. Firms must constantly weigh potential obsolescence costs of unused inventory (should sales not materialize) against potential expedite ...

Einhorn, Marshall

2007-01-01T23:59:59.000Z

475

Information Theory and Predictability for Low-Frequency Variability  

Science Conference Proceedings (OSTI)

A predictability framework, based on relative entropy, is applied here to low-frequency variability in a standard T21 barotropic model on the sphere with realistic orography. Two types of realistic climatology, corresponding to different heights ...

Rafail Abramov; Andrew Majda; Richard Kleeman

2005-01-01T23:59:59.000Z

476

A Study of Intraseasonal Temperature Variability in Southeastern South America  

Science Conference Proceedings (OSTI)

The main goal of this work was to conduct an intraseasonal climate variability analysis using wavelet and principal component analysis over a southeastern South American daily maximum and minimum temperature series from the end of the nineteenth ...

Gustavo Naumann; Walter M. Vargas

2012-09-01T23:59:59.000Z

477

Decadal Variability of Precipitation over Western North America  

Science Conference Proceedings (OSTI)

Decadal (>7- yr period) variations of precipitation over western North America account for 20%–50% of the variance of annual precipitation. Spatially, the decadal variability is broken into several regional [O(1000 km)] components. These decadal ...

Daniel R. Cayan; Michael D. Dettinger; Henry F. Diaz; Nicholas E. Graham

1998-12-01T23:59:59.000Z

478

Intraseasonal Variability of the South China Sea Summer Monsoon  

Science Conference Proceedings (OSTI)

The objective of this study is to explore, based on the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis data, the intraseasonal variability of the South China Sea (SCS) summer monsoon (...

Jiangyu Mao; Johnny C. L. Chan

2005-07-01T23:59:59.000Z

479

Wavelet Analysis of the Interannual Variability in Southern Québec Streamflow  

Science Conference Proceedings (OSTI)

The objectives of this study are to describe the local interannual variability in southern Québec, Canada, streamflow, based on wavelet analysis, and to identify plausible climatic teleconnections that could explain these local variations. Scale-...

François Anctil; Paulin Coulibaly

2004-01-01T23:59:59.000Z

480

Climatology and Interannual Variability of North Atlantic Hurricane Tracks  

Science Conference Proceedings (OSTI)

The spatial and temporal variability of North Atlantic hurricane tracks and its possible association with the annual hurricane landfall frequency along the U.S. East Coast are studied using principal component analysis (PCA) of hurricane track ...

Lian Xie; Tingzhuang Yan; Leonard J. Pietrafesa; John M. Morrison; Thomas Karl

2005-12-01T23:59:59.000Z

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481

Homoclinic Dynamics: A Scenario for Atmospheric Ultralow-Frequency Variability  

Science Conference Proceedings (OSTI)

In this paper, a link will be established between atmospheric ultralow-frequency variability (ULFV) and the occurrence of homoclinic dynamics in models of large-scale atmospheric flow. It is known that uncoupled atmosphere models possess ...

Daan T. Crommelin

2002-05-01T23:59:59.000Z

482

Low-Frequency Variability in the Wind-Driven Circulation  

Science Conference Proceedings (OSTI)

The origins of low-frequency variability in a simple homogenous ocean model, forced by a double gyre Ekman suction, are examined numerically. It is found that irregular, large amplitude vacillations in the structure of the circulation typify the ...

S. P. Meacham

2000-02-01T23:59:59.000Z

483

Indian Ocean Intraseasonal Variability in an Ocean General Circulation Model  

Science Conference Proceedings (OSTI)

The impact of atmospheric intraseasonal variability on the tropical Indian Ocean is examined with an ocean general circulation model (OGCM). The model is forced by observation-based wind stresses and surface heat fluxes from an atmospheric ...

A. Schiller; J. S. Godfrey

2003-01-01T23:59:59.000Z

484

Have Aerosols Caused the Observed Atlantic Multidecadal Variability?  

E-Print Network (OSTI)

Identifying the prime drivers of the twentieth-century multidecadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather ...

Zhang, Rong

485

Have Aerosols Caused the Observed Atlantic Multidecadal Variability?  

Science Conference Proceedings (OSTI)

Identifying the prime drivers of the twentieth-century multidecadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather and precipitation ...

Rong Zhang; Thomas L. Delworth; Rowan Sutton; Daniel L. R. Hodson; Keith W. Dixon; Isaac M. Held; Yochanan Kushnir; John Marshall; Yi Ming; Rym Msadek; Jon Robson; Anthony J. Rosati; MingFang Ting; Gabriel A. Vecchi

2013-04-01T23:59:59.000Z

486

Antarctic Sea Ice Extent Variability and Its Global Connectivity  

Science Conference Proceedings (OSTI)

This study statistically evaluates the relationship between Antarctic sea ice extent and global climate variability. Temporal cross correlations between detrended Antarctic sea ice edge (SIE) anomaly and various climate indices are calculated. ...

Xiaojun Yuan; Douglas G. Martinson

2000-05-01T23:59:59.000Z

487

Observed Interannual Variability of Tropical Troposphere Relative Humidity  

Science Conference Proceedings (OSTI)

Relative humidity fields from the High-Resolution Infrared Radiation Sounder (HIRS) flown on NOAA series satellites since 1979 have been used to study the seasonal aspects of the interannual variability of relative humidity in the tropical ...

Mark P. McCarthy; Ralf Toumi

2004-08-01T23:59:59.000Z

488

Intraseasonal Variability in MERRA Energy Fluxes over the Tropical Oceans  

Science Conference Proceedings (OSTI)

This paper investigates intraseasonal variability as represented by the recent NASA Global Modeling and Assimilation Office (GMAO) reanalysis, the Modern-Era Retrospective analysis for Research and Applications (MERRA). The authors examine the ...

Franklin R. Robertson; Jason B. Roberts

2012-09-01T23:59:59.000Z

489

Intraseasonal Oscillations and Interannual Variability of the Indian Summer Monsoon  

Science Conference Proceedings (OSTI)

How and to what extent the intraseasonal oscillations (ISOs) influence the seasonal mean and its interannual variability of the Indian summer monsoon is investigated using 42-yr (1956–97) daily circulation data from National Centers for ...

B. N. Goswami; R. S. Ajaya Mohan

2001-03-01T23:59:59.000Z

490

Mesoscale Variability in Denmark Strait: The PV Outflow Hypothesis  

Science Conference Proceedings (OSTI)

The outflow through Denmark Strait shows remarkable mesoscale variability characterized by the continuous formation of intense mesoscale cyclones just south of the sill. These cyclones have a diameter of about 30 km and clear signatures at the ...

Michael A. Spall; James F. Price

1998-08-01T23:59:59.000Z

491

Variability of Population-Weighted Seasonal Heating Degree Days  

Science Conference Proceedings (OSTI)

Regional and national heating fuel demand is related to both weather and population density. This study analyzes the variability of population-weighted, seasonal heating degree days for the coterminous 48 states. A risk assessment of unusual ...

Nathaniel B. Guttman

1983-03-01T23:59:59.000Z

492

Atmospheric Variability on a Zonally Symmetric Land Planet  

Science Conference Proceedings (OSTI)

Atmospheric variability an a zonally symmetric planet in the absence of external forcing anomalies is studied. With idealized boundary conditions such as the absence of ocean and topography, and by using perpetual equinox solar forcing, a 15-year ...

Lai-Yung Leung; Gerald R. North

1991-08-01T23:59:59.000Z

493

Separating Forced from Chaotic Climate Variability over the Past Millennium  

Science Conference Proceedings (OSTI)

Reconstructions of past climate show notable temperature variability over the past millennium, with relatively warm conditions during the Medieval Climate Anomaly (MCA) and a relatively cold Little Ice Age (LIA). Multimodel simulations of the past ...

Andrew P. Schurer; Gabriele C. Hegerl; Michael E. Mann; Simon F. B. Tett; Steven J. Phipps

2013-09-01T23:59:59.000Z

494

Intraseasonal and Interannual Variability of Rainfall over India  

Science Conference Proceedings (OSTI)

A gridded daily rainfall dataset prepared from observations at 3700 stations is used to analyze the intraseasonal and interannual variability of the summer monsoon rainfall over India. It is found that the major drought years are characterized by ...

V. Krishnamurthy; J. Shukla

2000-12-01T23:59:59.000Z

495

Pacific Decadal Variability: Paced by Rossby Basin Modes?  

Science Conference Proceedings (OSTI)

A systematic study is presented of decadal climate variability in the North Pacific. In particular, the hypothesis is addressed that oceanic Rossby basin modes are responsible for enhanced energy at decadal and bidecadal time scales. To this end, ...

Wilbert Weijer; Ernesto Muńoz; Niklas Schneider; François Primeau

2013-02-01T23:59:59.000Z

496

Statistical Quality of Spectral Polarimetric Variables for Weather Radar  

Science Conference Proceedings (OSTI)

Spectral polarimetry for weather radar capitalizes on both Doppler and polarimetric measurements to reveal polarimetric variables as a function of radial velocity through spectral analysis. For example, spectral differential reflectivity at a ...

Tian-You Yu; Xiao Xiao; Yadong Wang

2012-09-01T23:59:59.000Z

497

Heart Rate Variability in Mice with Coronary Heart Disease  

E-Print Network (OSTI)

Heart rate variability (HRV), the beat-to-beat fluctuation of the heart rate, is a noninvasive test that measures the autonomic regulation of the heart. Assessment of HRV has been shown to predict the risk of mortality in patients after an acute myocardial infarction. Recently, the Krieger lab at MIT developed genetically engineered double knockout (dKO) mice that develop coronary artery disease accompanied by spontaneous myocardial infarctions and die at a very young age. This thesis investigated whether HRV could function as a prognostic indicator in the dKO mouse. A novel method for estimating physiological state of the mouse from the electrocardiogram using an innovative activity index was developed in order to compare HRV variables at different times while controlling for physiologic state. Traditional time and frequency domain variables were used to assess the prognostic power of HRV. Results have shown that none of the HRV variables were helpful in predicting

Laurence Zapanta; Roger G. Mark

2005-01-01T23:59:59.000Z

498

Estimation of Ultraviolet-B Irradiance under Variable Cloud Conditions  

Science Conference Proceedings (OSTI)

Methods to estimate the irradiance of ultraviolet-B (UVB; 280–320 nm) radiation are needed to assess biological effects of changes in atmospheric composition. Measurements of the spatial distribution of sky cloud cover, temporal variability of ...

Richard H. Grant; Gordon M. Heisler

2000-06-01T23:59:59.000Z

499

Understanding Space Weather: The Sun as a Variable Star  

Science Conference Proceedings (OSTI)

The American Meteorological Society has recently adopted space weather as a new core competency. This is the first in a series of papers discussing the multidisciplinary aspects of space weather. This paper concerns the physics behind solar variability, ...

Keith Strong; Julia Saba; Therese Kucera

2012-09-01T23:59:59.000Z

500

Spatiotemporal Variability of Summer Precipitation in Southeastern Arizona  

Science Conference Proceedings (OSTI)

The Walnut Gulch Experimental Watershed (WGEW) in Southeastern Arizona covers ~150 km2 and receives the majority of its annual precipitation from highly variable and intermittent summer storms during the North American monsoon. In this study the ...

Susan Stillman; Xubin Zeng; William J. Shuttleworth; David C. Goodrich; Carl L. Unkrich; Marek Zreda