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they are not comprehensive nor are they the most current set.
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1

Time Series Analysis  

Science Journals Connector (OSTI)

Know how to apply simple methods for time series forecasting such as moving averages and the three levels of exponential smoothing.

Marc Goetschalckx

2011-01-01T23:59:59.000Z

2

Time Series Analysis James D. Hamilton  

E-Print Network [OSTI]

Time Series Analysis James D. Hamilton Since its publication just over ten years ago, James Hamilton's Time Series Analysis has taken its place in the canon of modern technical eco- nomic literature study, Hamilton's book en- joyed popularity among econometricians in seminars in Europe and North

Landweber, Laura

3

EOD TIME SERIES ANALYSIS OF GNATHONEMUS PETERSII  

Science Journals Connector (OSTI)

SUMMARY Series of electric organ discharges of Gnathonemus petersii were recorded by means of a pair of symmetrical electrode assemblies on each side of the fish. The spontaneous \\{EODs\\} in the stationary phase were differentiated (into two groups) according to amplitude variations; the left-dominant and the right-dominant groups. It is concluded that the electric organs are discharging alternately with a monomodal interval distribution on each side. A small distance between bilateral electric organs which would produce temporal EOD slipping-off is far more effective for detection of the electric field disturbances.

S. Chichibu

1981-01-01T23:59:59.000Z

4

Time series data mining for the Gaia variability analysis  

E-Print Network [OSTI]

Gaia is an ESA cornerstone mission, which was successfully launched December 2013 and commenced operations in July 2014. Within the Gaia Data Processing and Analysis consortium, Coordination Unit 7 (CU7) is responsible for the variability analysis of over a billion celestial sources and nearly 4 billion associated time series (photometric, spectrophotometric, and spectroscopic), encoding information in over 800 billion observations during the 5 years of the mission, resulting in a petabyte scale analytical problem. In this article, we briefly describe the solutions we developed to address the challenges of time series variability analysis: from the structure for a distributed data-oriented scientific collaboration to architectural choices and specific components used. Our approach is based on Open Source components with a distributed, partitioned database as the core to handle incrementally: ingestion, distributed processing, analysis, results and export in a constrained time window.

Nienartowicz, Krzysztof; Guy, Leanne; Holl, Berry; Lecoeur-Taïbi, Isabelle; Mowlavi, Nami; Rimoldini, Lorenzo; Ruiz, Idoia; Süveges, Maria; Eyer, Laurent

2014-01-01T23:59:59.000Z

5

Time series power flow analysis for distribution connected PV generation.  

SciTech Connect (OSTI)

Distributed photovoltaic (PV) projects must go through an interconnection study process before connecting to the distribution grid. These studies are intended to identify the likely impacts and mitigation alternatives. In the majority of the cases, system impacts can be ruled out or mitigation can be identified without an involved study, through a screening process or a simple supplemental review study. For some proposed projects, expensive and time-consuming interconnection studies are required. The challenges to performing the studies are twofold. First, every study scenario is potentially unique, as the studies are often highly specific to the amount of PV generation capacity that varies greatly from feeder to feeder and is often unevenly distributed along the same feeder. This can cause location-specific impacts and mitigations. The second challenge is the inherent variability in PV power output which can interact with feeder operation in complex ways, by affecting the operation of voltage regulation and protection devices. The typical simulation tools and methods in use today for distribution system planning are often not adequate to accurately assess these potential impacts. This report demonstrates how quasi-static time series (QSTS) simulation and high time-resolution data can be used to assess the potential impacts in a more comprehensive manner. The QSTS simulations are applied to a set of sample feeders with high PV deployment to illustrate the usefulness of the approach. The report describes methods that can help determine how PV affects distribution system operations. The simulation results are focused on enhancing the understanding of the underlying technical issues. The examples also highlight the steps needed to perform QSTS simulation and describe the data needed to drive the simulations. The goal of this report is to make the methodology of time series power flow analysis readily accessible to utilities and others responsible for evaluating potential PV impacts.

Broderick, Robert Joseph; Quiroz, Jimmy Edward; Ellis, Abraham; Reno, Matthew J. [Georgia Institute of Technology, Atlanta, GA; Smith, Jeff [Electric Power Research Institute, Knoxville, TN; Dugan, Roger [Electric Power Research Institute, Knoxville, TN

2013-01-01T23:59:59.000Z

6

Cluster-weighted modelling for time-series analysis  

Science Journals Connector (OSTI)

... system, Fig. 4 plots time-series data recorded from a violin, with the output audio as well as the relevant player inputs (bow and finger positions) used to perform ...

N. Gershenfeld; B. Schoner; E. Metois

1999-01-28T23:59:59.000Z

7

Invariant time-series factorization  

Science Journals Connector (OSTI)

Time-series analysis is an important domain of machine learning and a plethora of methods have been developed for the task. This paper proposes a new representation of time series, which in contrast to existing approaches, decomposes a time-series dataset ... Keywords: Data mining, Time-series classification, Time-series factorization

Josif Grabocka; Lars Schmidt-Thieme

2014-09-01T23:59:59.000Z

8

The level crossing analysis of German stock market index (DAX) and daily oil price time series  

E-Print Network [OSTI]

The level crossing analysis of DAX and oil price time series are given. We determine the average frequency of positive-slope crossings, $\

Shayeganfar, F; Peinke, J; Tabar, M Reza Rahimi

2010-01-01T23:59:59.000Z

9

Inverting geodetic time series with a principal component analysis-based inversion method  

E-Print Network [OSTI]

Inverting geodetic time series with a principal component analysis-based inversion method A. P (2010), Inverting geodetic time series with a principal component analysis-based inversion method, J; Cohen, 1999]. This formulation is linear and easily inverted using standard algorithms. The distribution

Avouac, Jean-Philippe

10

Nonlinear analysis of time series of vibration data from a friction brake: SSA, PCA, and MFDFA  

E-Print Network [OSTI]

We use the methodology of singular spectrum analysis (SSA), principal component analysis (PCA), and multi-fractal detrended fluctuation analysis (MFDFA), for investigating characteristics of vibration time series data from a friction brake. SSA and PCA are used to study the long time-scale characteristics of the time series. MFDFA is applied for investigating all time scales up to the smallest recorded one. It turns out that the majority of the long time-scale dynamics, that is presumably dominated by the structural dynamics of the brake system, is dominated by very few active dimensions only and can well be understood in terms of low dimensional chaotic attractors. The multi-fractal analysis shows that the fast dynamical processes originating in the friction interface are in turn truly multi-scale in nature.

Nikolay K. Vitanov; Norbert P. Hoffmann; Boris Wernitz

2014-10-23T23:59:59.000Z

11

Usage of the Mori-Zwanzig method in time series analysis  

Science Journals Connector (OSTI)

The use of memory kernels stemming from a Mori-Zwanzig approach to time series analysis is discussed. We show that despite its success in determining properties from an analytical model, the kernel itself is not easily interpreted. We consider a recently introduced discretization of the kernel and show that its properties can be quite different from its continuous counterpart. We provide a rigorous analysis of the discrete case and show for several analytically calculated memory kernels of simple time series processes that their features are not readily detectable in the kernel. We show furthermore that practical relevant Mori-Zwanzig models with a finite kernel form a true subclass of the autoregressive moving average (ARMA) models. The fact that this approach already veils the properties of these simple time series gives rise to severe doubts about its applicability in more complex situations.

Markus Niemann; Thomas Laubrich; Eckehard Olbrich; Holger Kantz

2008-01-16T23:59:59.000Z

12

Analysis of Brain States from Multi-Region LFP Time-Series  

E-Print Network [OSTI]

Analysis of Brain States from Multi-Region LFP Time-Series Kyle Ulrich 1 , David E. Carlson 1 field potential (LFP) is a source of information about the broad patterns of brain activity. It is believed that these regions may jointly constitute a "brain state," relating to cognition and behavior

Carin, Lawrence

13

CHAPTER XV - TIME SERIES  

Science Journals Connector (OSTI)

Publisher Summary This chapter provides an overview of time series. A time series is a set of observations of a variable made at different points of time and arranged in chronological order, each observation representing the value of the variable either at a given moment or during the interval of time between this observation and the preceding one. In general, the observations forming a time-series as made at equidistant intervals of time are considered. The factors affecting time-series may be recurring or nonrecurring, or evolutionary, periodic, or random. The method of moving averages consists in determining the average value for a certain number of terms of a time series and taking this average as the trend normal value for the middle of the period covered in the calculation of the average, that is, the period extent of the moving average.

ISAAC PAENSON

1970-01-01T23:59:59.000Z

14

Time series analysis of AERI radiances for GCM testing and improvement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Time series analysis of AERI radiances for GCM testing and improvement Time series analysis of AERI radiances for GCM testing and improvement Dykema, John Harvard University Leroy, Stephen Harvard University Anderson, James Harvard University Tobin, David University of Wisconsin-Madison Knuteson, Robert University Of Wisconsin Revercomb, Henry University of Wisconsin-Madison Category: Radiation High resolution infrared radiances measured by the Atmospheric Emitted Radiance Interferometer (AERI) contained detailed information about the structure and dynamics of temperature, water vapor, and clouds below 3 km. Infrared radiances also contain the signature of radiative forcing by well-mixed gases that constitutes the greenhouse effect. Direct comparison of these radiance observations to similar radiances calculated from output

15

Automated preparation of Kepler time series of planet hosts for asteroseismic analysis  

E-Print Network [OSTI]

One of the tasks of the Kepler Asteroseismic Science Operations Center (KASOC) is to provide asteroseismic analyses on Kepler Objects of Interest (KOIs). However, asteroseismic analysis of planetary host stars presents some unique complications with respect to data preprocessing, compared to pure asteroseismic targets. If not accounted for, the presence of planetary transits in the photometric time series often greatly complicates or even hinders these asteroseismic analyses. This drives the need for specialised methods of preprocessing data to make them suitable for asteroseismic analysis. In this paper we present the KASOC Filter, which is used to automatically prepare data from the Kepler/K2 mission for asteroseismic analyses of solar-like planet host stars. The methods are very effective at removing unwanted signals of both instrumental and planetary origins and produce significantly cleaner photometric time series than the original data. The methods are automated and can therefore easily be applied to a ...

Handberg, R

2014-01-01T23:59:59.000Z

16

Monthly sunspot number time series analysis and its modeling through autoregressive artificial neural network  

E-Print Network [OSTI]

This study reports a statistical analysis of monthly sunspot number time series and observes non homogeneity and asymmetry within it. Using Mann-Kendall test a linear trend is revealed. After identifying stationarity within the time series we generate autoregressive AR(p) and autoregressive moving average (ARMA(p,q)). Based on minimization of AIC we find 3 and 1 as the best values of p and q respectively. In the next phase, autoregressive neural network (AR-NN(3)) is generated by training a generalized feedforward neural network (GFNN). Assessing the model performances by means of Willmott's index of second order and coefficient of determination, the performance of AR-NN(3) is identified to be better than AR(3) and ARMA(3,1).

Goutami Chattopadhyay; Surajit Chattopadhyay

2012-04-18T23:59:59.000Z

17

Simplicial Multivalued Maps and the Witness Complex for Dynamical Analysis of Time Series  

E-Print Network [OSTI]

Topology based analysis of time-series data from dynamical systems is powerful: it potentially allows for computer-based proofs of the existence of various classes of regular and chaotic invariant sets for high-dimensional dynamics. Standard methods are based on a cubical discretization of the dynamics, and use the time series to construct an outer approximation of the underlying dynamical system. The resulting multivalued map can be used to compute the Conley index of isolated invariant sets of cubes. In this paper we introduce a discretization that uses---by contrast---a simplicial complex constructed from a witness-landmark relationship. The goal is to obtain a natural discretization that is more tightly connected with the invariant density of the time series itself. The time-ordering of the data also directly leads to a map on this simplicial complex that we call the witness map. We obtain conditions under which this witness map gives an outer approximation of the dynamics, and thus can be used to compute the Conley index of isolated invariant sets. The method is illustrated by a simple example using data from the classical H\\'enon map.

Zachary Alexander; Elizabeth Bradley; James D. Meiss; Nicole Sanderson

2014-06-09T23:59:59.000Z

18

Use of Long Time-series ACRF Measurements to Improve Data Quality Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2, 2008 2, 2008 Eighteenth ARM Science Team Meeting 1 Use of Long Time-Series ACRF Measurements to Improve Data Quality Analysis Sean Moore Mission Research and Technical Services Santa Barbara, CA ARM Data Quality Office University of Oklahoma Norman, OK March 12, 2008 Eighteenth ARM Science Team Meeting 2 ARM Data Quality Office Full Time Staff *Ken Kehoe *Randy Peppler *Karen Sonntag *Justin Monroe Student Analysts *Nathan Hiers (Sr) *Stephen Mullens (Sr) *Kimberly Rabon (Jr) *Lacey Evans (Jr) ARM Data Quality Office, National Weather Center The University of Oklahoma, Norman, OK Sean Moore Mission Research and Technical Services Santa Barbara, CA March 12, 2008 Eighteenth ARM Science Team Meeting 3 Daily Quality Checks * Automated software checks every measurement for outliers against some pre-defined limits.

19

Biomedical time series analysis based on bag-of-words model.  

E-Print Network [OSTI]

??This research proposes a number of new methods for biomedical time series classification and clustering based on a novel Bag-of-Words (BoW) representation. It is anticipated… (more)

Wang, Jin

2013-01-01T23:59:59.000Z

20

Precursory signatures of protein folding/unfolding: From time series correlation analysis to atomistic mechanisms  

SciTech Connect (OSTI)

Folded conformations of proteins in thermodynamically stable states have long lifetimes. Before it folds into a stable conformation, or after unfolding from a stable conformation, the protein will generally stray from one random conformation to another leading thus to rapid fluctuations. Brief structural changes therefore occur before folding and unfolding events. These short-lived movements are easily overlooked in studies of folding/unfolding for they represent momentary excursions of the protein to explore conformations in the neighborhood of the stable conformation. The present study looks for precursory signatures of protein folding/unfolding within these rapid fluctuations through a combination of three techniques: (1) ultrafast shape recognition, (2) time series segmentation, and (3) time series correlation analysis. The first procedure measures the differences between statistical distance distributions of atoms in different conformations by calculating shape similarity indices from molecular dynamics simulation trajectories. The second procedure is used to discover the times at which the protein makes transitions from one conformation to another. Finally, we employ the third technique to exploit spatial fingerprints of the stable conformations; this procedure is to map out the sequences of changes preceding the actual folding and unfolding events, since strongly correlated atoms in different conformations are different due to bond and steric constraints. The aforementioned high-frequency fluctuations are therefore characterized by distinct correlational and structural changes that are associated with rate-limiting precursors that translate into brief segments. Guided by these technical procedures, we choose a model system, a fragment of the protein transthyretin, for identifying in this system not only the precursory signatures of transitions associated with ? helix and ? hairpin, but also the important role played by weaker correlations in such protein folding dynamics.

Hsu, P. J.; Lai, S. K., E-mail: sklai@coll.phy.ncu.edu.tw [Complex Liquids Laboratory, Department of Physics, National Central University, Chungli 320 Taiwan (China); Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan (China); Cheong, S. A. [Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore)

2014-05-28T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Correlation analysis for wind speed and failure rate of wind turbines using time series approach  

Science Journals Connector (OSTI)

The correlation between wind speed and failure rate (FR) of wind turbines is analyzed with time series approach. The time series of power index (PI) and FR of wind turbines are established based on historical data which are pretreated by singularity processing stationarity processing and wavelet de-noising. The trend variations of the time series are analyzed from both time domain and frequency domain by extracting the indicator functions including auto-correlation function cross-correlation function and spectral density function. A case study is given out to verify the validity of the model and the method which is based on the wind speed and failure data from January 1995 to December of 2002 in Nordjylland Denmark. Auto-correlation function and spectral density function show that time series of PI and FR have strong seasonal characteristics and quite similar periodicity while the cross-correlation function shows they keep high consistency and strong correlation. The results indicate that by calculating and monitoring PI the failure rule of wind turbines can be forecast which provides theoretical basis for preventive maintenance of wind turbines.

Chun Su; Quan Jin; Yequn Fu

2012-01-01T23:59:59.000Z

22

Geographia Polonica, 25 (1973), 103-106 REGIONAL ANALYSIS: TIME SERIES EXTENDED TO TWO DIMENSIONS  

E-Print Network [OSTI]

transmission studies. Norbert Wiener was able to combine these two sources and the hybrid has shown to be following these lines. In the first instance consider a geographical distribution to be completely static cited resulted in one observation every mile of the 2900 mile long route. In time series it is usually

Tobler, Waldo

23

Random time series in astronomy  

Science Journals Connector (OSTI)

...Thomas J. Maccarone Random time series in astronomy Simon Vaughan e-mail: simon.vaughan@leicester.ac.uk X-ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, Leicester LE1...

2013-01-01T23:59:59.000Z

24

Benchmarking of energy time series  

SciTech Connect (OSTI)

Benchmarking consists of the adjustment of time series data from one source in order to achieve agreement with similar data from a second source. The data from the latter source are referred to as the benchmark(s), and often differ in that they are observed at a lower frequency, represent a higher level of temporal aggregation, and/or are considered to be of greater accuracy. This report provides an extensive survey of benchmarking procedures which have appeared in the statistical literature, and reviews specific benchmarking procedures currently used by the Energy Information Administration (EIA). The literature survey includes a technical summary of the major benchmarking methods and their statistical properties. Factors influencing the choice and application of particular techniques are described and the impact of benchmark accuracy is discussed. EIA applications and procedures are reviewed and evaluated for residential natural gas deliveries series and coal production series. It is found that the current method of adjusting the natural gas series is consistent with the behavior of the series and the methods used in obtaining the initial data. As a result, no change is recommended. For the coal production series, a staged approach based on a first differencing technique is recommended over the current procedure. A comparison of the adjustments produced by the two methods is made for the 1987 Indiana coal production series. 32 refs., 5 figs., 1 tab.

Williamson, M.A.

1990-04-01T23:59:59.000Z

25

A Time Series Analysis of Food Price and Its Input Prices  

E-Print Network [OSTI]

....................................... 27 4.5 Residual Correlation Matrix of the VECM ................................................ 28 4.6 Decomposition of Forecast Error Variance for Each of Eight Series ........ 40 1 CHAPTER I INTRODUCTION Global food prices have....94 0.50 2.96 4.90 .13 Gasoline 0.79 0.34 0.12 1.41 .43 Corn 1.06 0.43 0.40 1.99 .41 Food CPI 5.28 0.10 5.12 5.45 .02 Ethanol 0.59 0.29 -0.06 1.29 .49 Food PPI 5.03 0.13 4.84 5.28 .03 Fuel PPI 4.98 0.29 4.41 5.59 .06 Dollar Index 4.70 0.09 4.55 4...

Routh, Kari 1988-

2012-11-27T23:59:59.000Z

26

Revisiting Algorithms for Generating Surrogate Time Series  

Science Journals Connector (OSTI)

The method of surrogates is one of the key concepts of nonlinear data analysis. Here, we demonstrate that commonly used algorithms for generating surrogates often fail to generate truly linear time series. Rather, they create surrogate realizations with Fourier phase correlations leading to nondetections of nonlinearities. We argue that reliable surrogates can only be generated, if one tests separately for static and dynamic nonlinearities.

C. Räth, M. Gliozzi, I. E. Papadakis, and W. Brinkmann

2012-10-05T23:59:59.000Z

27

Global Warming Is Driven by Anthropogenic Emissions: A Time Series Analysis Approach  

Science Journals Connector (OSTI)

The solar influence on global climate is nonstationary. Processes such as the Schwabe and Gleissberg cycles of the Sun, or the many intrinsic atmospheric oscillation modes, yield a complex pattern of interaction with multiple time scales. In addition, emissions of greenhouse gases, aerosols, or volcanic dust perturb the dynamics of this coupled system to different and still uncertain extents. Here we show, using two independent driving force reconstruction techniques, that the combined effect of greenhouse gases and aerosol emissions has been the main external driver of global climate during the past decades.

Pablo F. Verdes

2007-07-24T23:59:59.000Z

28

Time series anomaly detection using recessive subsequence  

Science Journals Connector (OSTI)

Time series arise frequently in many sciences and engineering application, including finance, digital audio, motion capture, network security, and transportation. In this work, we propose a technique for discovering anomalies in time series that takes ...

Yonchanok Khaokaew; Sirikarn Pukkawanna

2012-02-01T23:59:59.000Z

29

Comparing modern and Pleistocene ENSO-like influences in NW Argentina using nonlinear time series analysis methods  

E-Print Network [OSTI]

Comparing modern and Pleistocene ENSO-like influences in NW Argentina using nonlinear time series of 106 m3 occurred in the arid to semiarid intra-Andean basins of northwest- ern Argentina (Strecker Argentina are not well known for the period at around 30,000 14 C years ago. Marine and terrestrial records

Vuille, Mathias

30

Normalizing the causality between time series  

E-Print Network [OSTI]

Recently, a rigorous yet concise formula has been derived to evaluate the information flow, and hence the causality in a quantitative sense, between time series. To assess the importance of a resulting causality, it needs to be normalized. The normalization is achieved through distinguishing three types of fundamental mechanisms that govern the marginal entropy change of the flow recipient. A normalized or relative flow measures its importance relative to other mechanisms. In analyzing realistic series, both absolute and relative information flows need to be taken into account, since the normalizers for a pair of reverse flows belong to two different entropy balances; it is quite normal that two identical flows may differ a lot in relative importance in their respective balances. We have reproduced these results with several autoregressive models. We have also shown applications to a climate change problem and a financial analysis problem. For the former, reconfirmed is the role of the Indian Ocean Dipole as ...

Liang, X San

2015-01-01T23:59:59.000Z

31

The Biopsychology—Nonlinear Analysis Toolbox: A Free, Open-Source Matlab-Toolbox for the Non-linear Analysis of Time Series Data  

Science Journals Connector (OSTI)

We provide a free, open-source toolbox for non-linear time series analyses. The major goal of this project was to provide a toolbox for nonlinear ... . The toolbox can be run within the Matlab environment, but al...

Christian Beste; Tobias Otto; Sven Hoffmann

2010-10-01T23:59:59.000Z

32

Correcting and combining time series forecasters  

Science Journals Connector (OSTI)

Combined forecasters have been in the vanguard of stochastic time series modeling. In this way it has been usual to suppose that each single model generates a residual or prediction error like a white noise. However, mostly because of disturbances not ... Keywords: Artificial neural networks hybrid systems, Linear combination of forecasts, Maximum likelihood estimation, Time series forecasters, Unbiased forecasters

Paulo Renato A. Firmino; Paulo S. G. De Mattos Neto; Tiago A. E. Ferreira

2014-02-01T23:59:59.000Z

33

A time-series approach to dynamical systems from classical and quantum worlds  

SciTech Connect (OSTI)

This contribution discusses some recent applications of time-series analysis in Random Matrix Theory (RMT), and applications of RMT in the statistial analysis of eigenspectra of correlation matrices of multivariate time series.

Fossion, Ruben [Instituto Nacional de Geriatría, Periférico Sur No. 2767, Col. San Jerónimo Lídice, Del. Magdalena Contreras, 10200 México D.F., Mexico and Centro de Ciencias de la Complejidad (C3), Universidad Nacional Autó (Mexico)

2014-01-08T23:59:59.000Z

34

Comparing modern and Pleistocene ENSO-like influences in NW Argentina using nonlinear time series analysis methods  

E-Print Network [OSTI]

Higher variability in rainfall and river discharge could be of major importance in landslide generation in the north-western Argentine Andes. Annual layered (varved) deposits of a landslide dammed lake in the Santa Maria Basin (26 deg S, 66 deg W) with an age of 30,000 14C years provide an archive of precipitation variability during this time. The comparison of these data with present-day rainfall observations tests the hypothesis that increased rainfall variability played a major role in landslide generation. A potential cause of such variability is the El Nino/Southern Oscillation (ENSO). The causal link between ENSO and local rainfall is quantified by using a new method of nonlinear data analysis, the quantitative analysis of cross recurrence plots (CRP). This method seeks similarities in the dynamics of two different processes, such as an ocean-atmosphere oscillation and local rainfall. Our analysis reveals significant similarities in the statistics of both modern and palaeo-precipitation data. The similarities in the data suggest that an ENSO-like influence on local rainfall was present at around 30,000 14C years ago. Increased rainfall, which was inferred from a lake balance modeling in a previous study, together with ENSO-like cyclicities could help to explain the clustering of landslides at around 30,000 14C years ago.

N. Marwan; M. H. Trauth; M. Vuille; J. Kurths

2003-03-24T23:59:59.000Z

35

Can biomass time series be reliably assessed from CPUE time series data Francis Lalo1  

E-Print Network [OSTI]

1 Can biomass time series be reliably assessed from CPUE time series data only? Francis Laloë1 to abundance. This means (i) that catchability is constant and (ii) that all the biomass is catchable. If so, relative variations in CPUE indicate the same relative variations in biomass. Myers and Worm consider

Hawai'i at Manoa, University of

36

Overview of the Radiant Time Series Method  

E-Print Network [OSTI]

/CLF procedure. 1988 ­ Sowell publishes results of 200,000+ DOE-2 calculations of custom weighting factors; Mc are published in ASHRAE Handbook of Fundamentals #12;RTSM Algorithm Conduction Gains Split all heat gains Provide Some Physical Insight Into the Nature of the Calculation #12;The Radiant Time Series Steady

37

Hurst exponents for short time series  

Science Journals Connector (OSTI)

A concept called balanced estimator of diffusion entropy is proposed to detect quantitatively scalings in short time series. The effectiveness is verified by detecting successfully scaling properties for a large number of artificial fractional Brownian motions. Calculations show that this method can give reliable scalings for short time series with length ?102. It is also used to detect scalings in the Shanghai Stock Index, five stock catalogs, and a total of 134 stocks collected from the Shanghai Stock Exchange Market. The scaling exponent for each catalog is significantly larger compared with that for the stocks included in the catalog. Selecting a window with size 650, the evolution of scaling for the Shanghai Stock Index is obtained by the window's sliding along the series. Global patterns in the evolutionary process are captured from the smoothed evolutionary curve. By comparing the patterns with the important event list in the history of the considered stock market, the evolution of scaling is matched with the stock index series. We can find that the important events fit very well with global transitions of the scaling behaviors.

Jingchao Qi and Huijie Yang

2011-12-19T23:59:59.000Z

38

Forecasting correlated time series with exponential smoothing models  

Science Journals Connector (OSTI)

This paper presents the Bayesian analysis of a general multivariate exponential smoothing model that allows us to forecast time series jointly, subject to correlated random disturbances. The general multivariate model, which can be formulated as a seemingly unrelated regression model, includes the previously studied homogeneous multivariate Holt-Winters’ model as a special case when all of the univariate series share a common structure. MCMC simulation techniques are required in order to approach the non-analytically tractable posterior distribution of the model parameters. The predictive distribution is then estimated using Monte Carlo integration. A Bayesian model selection criterion is introduced into the forecasting scheme for selecting the most adequate multivariate model for describing the behaviour of the time series under study. The forecasting performance of this procedure is tested using some real examples.

Ana Corberán-Vallet; José D. Bermúdez; Enriqueta Vercher

2011-01-01T23:59:59.000Z

39

CHAPTER XVI - TIME SERIES: SEASONAL FLUCTUATIONS  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses the seasonal fluctuations in time series. Seasonal variations are defined either to be studied separately or—more often—to be removed, thus, allowing concentrating on the remaining variation. If the annual data are not strongly influenced by trend movements or cyclical changes, it is possible to compare seasonal data usually—monthly data with averages not adjusted for trend and express them as percentages of these averages. In reality, the amplitude and period of seasonal movements vary in most cases from year to year, being affected by seasonal as well as by cyclical, random, and other nonseasonal factors. The averages, expressed in percentages, thus obtained are preliminary seasonal indexes. Seasonal indices based on the fitting of curves to monthly ratios, expressed as percentages, to moving averages are called moving seasonal indexes.

ISAAC PAENSON

1970-01-01T23:59:59.000Z

40

Hypothesis Testing for Autocorrelated Short Climate Time Series  

Science Journals Connector (OSTI)

Commonly used statistical tests of hypothesis, also termed inferential tests, that are available to meteorologists and climatologists all require independent data in the time series to which they are applied. However, most of the time series that ...

Virginie Guemas; Ludovic Auger; Francisco J. Doblas-Reyes

2014-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Tracing of Error in a Time Series Data  

E-Print Network [OSTI]

A physical (e.g. astrophysical, geophysical, meteorological etc.) data may appear as an output of an experiment or it may contain some sociological, economic or biological information. Whatever be the source of a time series data some amount of noise is always expected to be embedded in it. Analysis of such data in presence of noise may often fail to give accurate information. Although text book data filtering theory is primarily concerned with the presences of random, zero mean errors; but in reality, errors in data are often systematic rather than random. In the present paper we produce different models of systematic error in the time series data. This will certainly help to trace the systematic error present in the data and consequently that can be removed as possible to make the data compatible for further study.

Koushik Ghosh; Probhas Raychaudhuri

2007-01-30T23:59:59.000Z

42

Power Series Power series are one of the most useful type of series in analysis. For example,  

E-Print Network [OSTI]

Chapter 6 Power Series Power series are one of the most useful type of series in analysis functions (and many other less familiar functions). 6.1. Introduction A power series (centered at 0 coefficients. If all but finitely many of the an are zero, then the power series is a polynomial function

Hunter, John K.

43

Pacific Ocean observation programs: Gaps in ecological time series  

Science Journals Connector (OSTI)

Abstract How well do existing ocean observation programs monitor the oceans through space and time? A meta-analysis of ocean observation programs in the Pacific Ocean was carried out to determine where and how key parameters defining the physics, chemistry, and biology of the oceans were measured. The analysis indicates that although the chemistry and physics of the Pacific Ocean are reasonably well monitored, ecological monitoring remains largely ad hoc, patchy, unsystematic, and inconsistent. The California Cooperative Oceanic Fisheries Investigations (CalCOFI), for example, is the only Pacific Ocean program in which the zooplankton and micronekton are resolved to species with consistent time series of greater than 20 years duration. Several studies now indicate massive changes to nearshore, mesopelagic and other fish communities of the southern California Current but available time series do not allow these potential changes to be examined more widely. Firm commitment from the global community to sustained, representative, quantitative marine observations at the species level is required to adequately assess the ecological status of the oceans.

J. Anthony Koslow; Jennifer Couture

2015-01-01T23:59:59.000Z

44

OBST-based segmentation approach to financial time series Yain-Whar Si n  

E-Print Network [OSTI]

applications. Examples of time series include historical price and trading volume obtained from financial stock' judgment. In technical analysis, time series data such as historical price, volume, and other statistical the movement of the price. Analysts may also take into account other factors such as government policies

Si, Yain Whar "Lawrence"

45

A scientific data processing framework for time series NetCDF data  

Science Journals Connector (OSTI)

The Atmospheric Radiation Measurement (ARM) Data Integrator (ADI) is a framework designed to streamline the development of scientific algorithms that analyze, and models that use time-series NetCDF data. ADI automates the process of retrieving and preparing ... Keywords: Atmospheric science, Data management, NetCDF, Observation data, Scientific data analysis, Scientific workflow, Time-series

Krista Gaustad, Tim Shippert, Brian Ermold, Sherman Beus, Jeff Daily, Atle Borsholm, Kevin Fox

2014-10-01T23:59:59.000Z

46

Time series of high resolution photospheric spectra in a quiet region of the Sun. II. Analysis of the variation of physical quantities of granular structures  

E-Print Network [OSTI]

From the inversion of a time series of high resolution slit spectrograms obtained from the quiet sun, the spatial and temporal distribution of the thermodynamical quantities and the vertical flow velocity is derived as a function of logarithmic optical depth and geometrical height. Spatial coherence and phase shift analyzes between temperature and vertical velocity depict the height variation of these physical quantities for structures of different size. An average granular cell model is presented, showing the granule-intergranular lane stratification of temperature, vertical velocity, gas pressure and density as a function of logarithmic optical depth and geometrical height. Studies of a specific small and a specific large granular cell complement these results. A strong decay of the temperature fluctuations with increasing height together with a less efficient penetration of smaller cells is revealed. The T -T coherence at all granular scales is broken already at log tau =-1 or z~170 km. At the layers beyon...

Puschmann, K G; Vazquez, M; Bonet, J A; Hanslmeier, A; 10.1051/0004-6361:20047193

2012-01-01T23:59:59.000Z

47

Genetic programming and serial processing for time series classification  

Science Journals Connector (OSTI)

This work describes an approach devised by the authors for time series classification. In our approach genetic programming is used in combination with a serial processing of data, where the last output is the result of the classification. The use of ... Keywords: Classification, genetic programming, real world applications, serial data processing, time series

Eva Alfaro-Cid; Ken Sharman; Anna I. Esparcia-Alcázar

2014-06-01T23:59:59.000Z

48

Generating Scenarios of Local Surface Temperature Using Time Series Methods  

Science Journals Connector (OSTI)

A method for creating scenarios of time series of monthly mean surface temperature at a specific site is developed. It is postulated that surface temperature can be specified as a linear combination of regional and local temperature components, ...

Robert S. Chen; Peter J. Robinson

1991-07-01T23:59:59.000Z

49

A new improved forecasting method integrated fuzzy time series with the exponential smoothing method  

Science Journals Connector (OSTI)

This paper presents a new method of integrated fuzzy time series with the exponential smoothing method to forecast university enrolments. The data of historical enrolments of the University of Alabama shown in Liu et al. (2011) are adopted to illustrate the forecasting process of the proposed method. A comparison has been made with five previous fuzzy time series models. Meanwhile, the mean squared error has also been calculated as the evaluation criterion to illustrate the performance of the proposed method. The empirical analysis shows that the proposed model reflects the fluctuations in fuzzy time series better and provides better overall forecasting results than the five listed previous models.

Peng Ge; Jun Wang; Peiyu Ren; Huafeng Gao; Yuyan Luo

2013-01-01T23:59:59.000Z

50

Weighted statistical parameters for irregularly sampled time series  

E-Print Network [OSTI]

Unevenly spaced time series are common in astronomy because of the day-night cycle, weather conditions, dependence on the source position in the sky, allocated telescope time, corrupt measurements, for example, or be inherent to the scanning law of satellites like Hipparcos and the forthcoming Gaia. This paper aims at improving the accuracy of common statistical parameters for the characterization of irregularly sampled signals. The uneven representation of time series, often including clumps of measurements and gaps with no data, can severely disrupt the values of estimators. A weighting scheme adapting to the sampling density and noise level of the signal is formulated. Its application to time series from the Hipparcos periodic catalogue led to significant improvements in the overall accuracy and precision of the estimators with respect to the unweighted counterparts and those weighted by inverse-squared uncertainties. Automated classification procedures employing statistical parameters weighted by the sugg...

Rimoldini, Lorenzo

2014-01-01T23:59:59.000Z

51

Long-range correlations and trends in Colombian seismic time series  

E-Print Network [OSTI]

We detect long-range correlations and trends in time series extracted from the data of seismic events occurred since 1973 until 2011 in a rectangular region that contain mainly all the continental part of Colombia. The long-range correlations are detected by the calculation of the Hurst exponents for the time series of interevent intervals, separation distances, depth differences and magnitude differences. By using a geometrical modification of the classical R/S method that has been developed to detect long-range correlations in short time series, we find the existence of persistence for all the time series considered. We find also, by using the DFA until the third order, that the time series of interevent intervals, separation distances and depth differences are influenced by quadratic trends, while the time series of magnitude differences is influenced by a linear trend. Finally, for the time series of interevent intervals, we present an analysis of the Hurst exponent as a function of the time and the minim...

Martin-Montoya, L A; Quimbay, C J

2014-01-01T23:59:59.000Z

52

Using high-frequency data and time series models to improve yield management  

Science Journals Connector (OSTI)

High-frequency (less than monthly) time series data provide valuable information for designing the adequate yield policy of the organisation. However, it is not easy to extract this information from raw data; although the evolution of the series is usually induced by stable patterns of behaviour of the economic agents, these patterns are so complex that simple smoothing techniques or subjective forecasting cannot consider all underlying factors. In this paper, we discuss time series models as a tool for carrying out a full and efficient analysis. The main ideas are illustrated with an application to Spanish daily electricity consumption.

Jose Ramon Cancelo; Antoni Espasa

2001-01-01T23:59:59.000Z

53

CONSISTENT FUNCTIONAL PCA FOR FINANCIAL TIME-SERIES Sebastian Jaimungal  

E-Print Network [OSTI]

of Figure 1 we present a time-series resulting from the NYMEX light sweet crude oil futures price data set sweet crude oil futures curves and demonstrate that it contains significant advan- tages over FPCA as opposed to a modification of the usual PCA is quite simple: futures price data on a given day

Jaimungal, Sebastian

54

Trade and Income Exploiting Time Series in James Feyrer  

E-Print Network [OSTI]

Trade and Income ­ Exploiting Time Series in Geography James Feyrer Dartmouth College October 23. Rodriguez and Rodrik (2000) show that these results are not robust to controlling for omitted variables conferences for helpful comments. All errors are my own. james.feyrer@dartmouth.edu, Dartmouth College

Lotko, William

55

Semi-Supervised Time Series Classification Li Wei Eamonn Keogh  

E-Print Network [OSTI]

, and hospitals often archive even larger amounts of ECG data for legal reasons. Recent advances in sensor examples to construct accurate classifiers. Furthermore, we are able to leverage off recent advancesSemi-Supervised Time Series Classification Li Wei Eamonn Keogh Department of Computer Science

Zordan, Victor

56

Time series of a CME blasting out from the Sun  

E-Print Network [OSTI]

#12;Time series of a CME blasting out from the Sun Composite image of the Sun in UV light with the naked eye, the Sun seems static, placid, constant. From the ground, the only notice- able variations in the Sun are its location (where will it rise and set today?) and its color (will clouds cover

Christian, Eric

57

Evolutionary optimization of sparsely connected and time-lagged neural networks for time series forecasting  

Science Journals Connector (OSTI)

Time series forecasting (TSF) is an important tool to support decision making (e.g., planning production resources). Artificial neural networks (ANNs) are innate candidates for TSF due to advantages such as nonlinear learning and noise tolerance. However, ... Keywords: Estimation distribution algorithm, Multilayer perceptron, Regression, Time series

Juan Peralta Donate, Paulo Cortez

2014-10-01T23:59:59.000Z

58

National Ignition Campaign (NIC) Precision Tuning Series Shock Timing Experiments  

SciTech Connect (OSTI)

A series of precision shock timing experiments have been performed on NIF. These experiments continue to adjust the laser pulse shape and employ the adjusted cone fraction (CF) in the picket (1st 2 ns of the laser pulse) as determined from the re-emit experiment series. The NIF ignition laser pulse is precisely shaped and consists of a series of four impulses, which drive a corresponding series of shock waves of increasing strength to accelerate and compress the capsule ablator and fuel layer. To optimize the implosion, they tune not only the strength (or power) but also, to sub-nanosecond accuracy, the timing of the shock waves. In a well-tuned implosion, the shock waves work together to compress and heat the fuel. For the shock timing experiments, a re-entrant cone is inserted through both the hohlraum wall and the capsule ablator allowing a direct optical view of the propagating shocks in the capsule interior using the VISAR (Velocity Interferometer System for Any Reflector) diagnostic from outside the hohlraum. To emulate the DT ice of an ignition capsule, the inside of the cone and the capsule are filled with liquid deuterium.

Robey, H F; Celliers, P M

2011-07-19T23:59:59.000Z

59

E-Print Network 3.0 - analyzing time-series gene Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

series in terms of number... gene networks from time series include boolean network models, 5 Correlation Metric Construction, 6... - constructed time ... Source: D'haeseleer,...

60

Temporal Resolution in Time Series and Probabilistic Models of Renewable Power Eric Hoevenaars  

E-Print Network [OSTI]

prediction of autonomous power systems: time series and probabilistic. Time series models are more common Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2.1 Wind Turbine Model

Victoria, University of

Note: This page contains sample records for the topic "time series analysis" 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

Power spectrum characteristics of body sway time series and velocity time series of the center of foot pressure during a static upright posture in preschool children  

Science Journals Connector (OSTI)

This study aimed to assess individual and gender differences in power spectra in the body sway time series and sway velocity time series during a static upright standing posture using 30 preschool children and...

S. Demura; T. Kitabayashi

2008-08-01T23:59:59.000Z

62

CDIAC::Carbon Emission::Time Series Global Data  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The 2013 version of this database presents a time series recording 1° The 2013 version of this database presents a time series recording 1° latitude by 1° longitude CO2 emissions in units of million metric tons of carbon per year from anthropogenic sources for 1751-2010. Detailed geographic information on CO2 emissions can be critical in understanding the pattern of the atmospheric and biospheric response to these emissions. Global, regional, and national annual estimates for 1751 through 2010 were published earlier (Boden et al. 2013). Those national, annual CO2 emission estimates were based on statistics about fossil-fuel burning, cement manufacturing and gas flaring in oil fields as well as energy production, consumption, and trade data, using the methods of Marland and Rotty (1984). The national annual estimates were combined with gridded 1° data on

63

Introduction to Time Series Analysis Instructor  

E-Print Network [OSTI]

and Statistics 585 King Edward Av. Office 203D Phone: 562-5800 Ext. 3526 Email: rkulik@uottawa.ca Schedule

Kulik, Rafal

64

Physical Langevin model and the time-series model in systems far from equilibrium  

Science Journals Connector (OSTI)

To bridge the gap between a physical Langevin equation and a stochastic equation used in the time-series analysis, and to clarify the physical foundations of the latter, the time-series model from the Langevin equation is derived with the aid of two manipulations—elimination of irrelevant variables and projection of state variables upon a space spanned by observed quantities. The order of the two manipulations is shown to be important to find an equation called the Kalman filter in control theory. All the results are summarized in a concise schematic diagram which relates various models and equations established so far in different fields.

Kuniharu Kishida

1982-01-01T23:59:59.000Z

65

Some applications of wavelets to time series data  

E-Print Network [OSTI]

stationary time series {Xt} is said to have long memory when long memory parameter d is between 0 and 0.5. Many methods of estimating long memory parameter based on its decay rate of autocorrelation or behavior of spectral density around zero have been....For consistency, some people consider the original dataXt asv0,t. Due to decimating property, we haveN/2j wavelet and scaling coefficients at levelj. The constraint on sample size, N = 2J can be relaxed by considering partial discrete wavelet transform. 2...

Jeong, Jae Sik

2009-05-15T23:59:59.000Z

66

Forecasting in Fuzzy Time Series by an Extension of Simple Exponential Smoothing  

Science Journals Connector (OSTI)

Time Series was introduced to improve the forecasting made by statistical methods in vague or imprecise data and in time series with few samples available. However, the integration of these concepts is a little e...

Fábio José Justo dos Santos…

2014-01-01T23:59:59.000Z

67

Identifying Customer Profiles in Power Load Time Series Using Spectral Clustering  

Science Journals Connector (OSTI)

An application of multiway spectral clustering with out-of-sample extensions towards clustering time series is presented. The data correspond to power load time series acquired from substations in the ... eigenve...

Carlos Alzate; Marcelo Espinoza; Bart De Moor…

2009-01-01T23:59:59.000Z

68

Moored instrument for time series studies of primary production and other microbial rate processes  

SciTech Connect (OSTI)

The goal of this project is to build and test a Time Series Submersible Incubation Device (TS-SID) capable of the autonomous in situ measurement of phytoplankton production and other rate processes for a period of up at least three months. The instrument is conceptually based on a recently constructed Submersible Incubation Device (SID). The TS-SID is to possess the ability to periodically incubate samples in the presence of an appropriate tracer, and to store 94 chemically fixed subsamples for later analysis. The TS-SID has been designed to accurately simulate the natural environment, and to avoid trace metal contamination and physical damage to cells. Devices for biofouling control of internal and external surfaces are to be incorporated into the instrument. After the time series capabilities of the instrument have been successfully evaluated by medium-term coastal time series studies (up to one month), longer-term coastal time series studies (2-3 months) will be conducted to evaluate the biofouling prevention measures that have been used with the instrument.

Taylor, C.D.; Doherty, K.W.

1993-01-20T23:59:59.000Z

69

Moored instrument for time series studies of primary production and other microbial rate processes. Progress report  

SciTech Connect (OSTI)

The goal of this project is to build and test a Time Series Submersible Incubation Device (TS-SID) capable of the autonomous in situ measurement of phytoplankton production and other rate processes for a period of up at least three months. The instrument is conceptually based on a recently constructed Submersible Incubation Device (SID). The TS-SID is to possess the ability to periodically incubate samples in the presence of an appropriate tracer, and to store 94 chemically fixed subsamples for later analysis. The TS-SID has been designed to accurately simulate the natural environment, and to avoid trace metal contamination and physical damage to cells. Devices for biofouling control of internal and external surfaces are to be incorporated into the instrument. After the time series capabilities of the instrument have been successfully evaluated by medium-term coastal time series studies (up to one month), longer-term coastal time series studies (2-3 months) will be conducted to evaluate the biofouling prevention measures that have been used with the instrument.

Taylor, C.D.; Doherty, K.W.

1993-01-20T23:59:59.000Z

70

MEPSA: a flexible peak search algorithm designed for uniformly spaced time series  

E-Print Network [OSTI]

We present a novel algorithm aimed at identifying peaks within a uniformly sampled time series affected by uncorrelated Gaussian noise. The algorithm, called "MEPSA" (multiple excess peak search algorithm), essentially scans the time series at different timescales by comparing a given peak candidate with a variable number of adjacent bins. While this has originally been conceived for the analysis of gamma-ray burst light (GRB) curves, its usage can be readily extended to other astrophysical transient phenomena, whose activity is recorded through different surveys. We tested and validated it through simulated featureless profiles as well as simulated GRB time profiles. We showcase the algorithm's potential by comparing with the popular algorithm by Li and Fenimore, that is frequently adopted in the literature. Thanks to its high flexibility, the mask of excess patterns used by MEPSA can be tailored and optimised to the kind of data to be analysed without modifying the code. The C code is made publicly availabl...

Guidorzi, C

2015-01-01T23:59:59.000Z

71

Scalable time series change detection for biomass monitoring using gaussian process  

SciTech Connect (OSTI)

Biomass monitoring, specifically detecting changes in the biomass or vegetation of a geographical region, is vital for studying the carbon cycle of the system and has significant implications in the context of understanding climate change and its impacts. Recently, several time series change detection methods have been proposed to identify land cover changes in temporal profiles (time series) of vegetation collected using remote sensing instruments. In this paper, we adapt Gaussian process regression to detect changes in such time series in an online fashion. While Gaussian process (GP) has been widely used as a kernel based learning method for regression and classification, their applicability to massive spatio-temporal data sets, such as remote sensing data, has been limited owing to the high computational costs involved. In this paper we address the scalability aspect of GP based time series change detection. Specifically, we exploit the special structure of the covariance matrix generated for GP analysis to come up with methods that can efficiently estimate the hyper-parameters associated with GP as well as identify changes in the time series while requiring a memory footprint which is linear in the size of input data, as compared to traditional method which involves solving a linear system of equations for the Choleksy decomposition of the quadratic sized covariance matrix. Experimental results show that our proposed method achieves significant speedups, as high as 1000, when processing long time series, while maintaining a small memory footprint. To further improve the computational complexity of the proposed method, we provide a parallel version which can concurrently process multiple input time series using the same set of hyper-parameters. The parallel version exploits the natural parallelization potential of the serial algorithm and is shown to perform significantly better than the serial version, with speedups as high as 10. Finally, we demonstrate the effectiveness of the proposed change detection method in identifying changes in Normalized Difference Vegetation Index (NDVI) data. Moreover, we show that the scalable solution is able to process NDVI data for the entire Iowa region significantly faster than the standard method.

Chandola, Varun [ORNL; Vatsavai, Raju [ORNL

2010-01-01T23:59:59.000Z

72

Power spectra of fossil biodiversity time series: a connection with Galactic dynamics?  

E-Print Network [OSTI]

Systematic error is a major issue in the quantitative analysis of fossil biodiversity data in paleontology. I present results of time series analysis of a new and expanded data set (the Paleobiology Database) controlled and corrected for systematic error, and find that periodicities at approximately 62 and 150 Myr reported from previous data emerge at higher significance than before. This provides increased confidence that the periodicities are not collection, sampling, or binning artifacts. Both of these timescales are interestingly close to dynamical timescales of Solar motion in the Milky Way galaxy.

Melott, Adrian L

2008-01-01T23:59:59.000Z

73

E-Print Network 3.0 - ad-hoc time series Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

series Search Powered by Explorit Topic List Advanced Search Sample search results for: ad-hoc time series Page: << < 1 2 3 4 5 > >> 1 International Journal of Information...

74

SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data  

Science Journals Connector (OSTI)

SumTime-Turbine...produces textual summaries of archived time-series data from gas turbines. These summaries should help experts understand large...SumTime-Turbine is based on pattern detection, ...

Jin Yu; Ehud Reiter; Jim Hunter…

2003-01-01T23:59:59.000Z

75

Sandia National Laboratories: virtual time series of solar power...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy, Modeling & Analysis, News, News & Events, Partnership, Photovoltaic, Renewable Energy, Solar, Systems Analysis The book, Solar Energy Forecasting and Resource...

76

SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data  

E-Print Network [OSTI]

SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data Jin Yu produces textual summaries of archived time- series data from gas turbines. These summaries should help evaluated. 1 Introduction In order to get the most out of gas turbines, TIGER [2] has been developed

Reiter, Ehud

77

Bayesian forecasting of demand time-series data with zero values  

Science Journals Connector (OSTI)

This paper describes the development of a Bayesian procedure to analyse and forecast positive demand time-series data with a proportion of zero values and a high level of variability for the non-zero data. The resulting forecasts play decisive roles in organisational planning, budgeting, and performance monitoring. Exponential smoothing methods are widely used as forecasting techniques in industry and business. However, they can be unsuitable for the analysis of non-negative demand time-series data with the aforementioned features. In this paper, an unconstrained latent demand underlying the observed demand is introduced into the linear heteroscedastic model associated with the Holt-Winters model. Accurate forecasts for the observed demand can readily be derived from those obtained with exponential smoothing for the latent demand. The performance of the proposed procedure is illustrated using a simulation study and two real time-series datasets which correspond to tourism demand and book sales. [Received 4 November 2010; Revised 7 September 2011, 10 April 2012; Accepted 10 May 2012

Ana Corberán-Vallet; José D. Bermúdez; Enriqueta Vercher

2013-01-01T23:59:59.000Z

78

The Living Planet Index: using species population time series to track trends in biodiversity  

E-Print Network [OSTI]

The Living Planet Index: using species population time series to track trends in biodiversity of the world's biodiversity over time. It uses time-series data to calculate average rates of change in a large number of populations of terrestrial, freshwater and marine vertebrate species. The dataset contains

Vermont, University of

79

Resampling Methodology in Spatial Prediction and Repeated Measures Time Series  

E-Print Network [OSTI]

procedure can also be used to produce prediction intervals. When 18 the Y (?) process is Gaussian, these prediction intervals should perform no better than the interval in (D.14). However, when working with real world data, the assumptions of a Gaussian...- series representation given by ?(x) = ?? k=0 dk(x? ?(s0))k, x ? R (E.19) for some d0, d1, . . . ? R. Further, supppose that E [ Z?n(s0) ]2 = O(1) and that for some k1 ? (0,?), ?? k=1 ?? j=1 kj|dkdj|2 (k+j?2)/2? ( k + j ? 1 2 )[ ?j+k?2...

Rister, Krista Dianne

2012-02-14T23:59:59.000Z

80

TQuEST: Threshold Query Execution for Large Sets of Time Series  

E-Print Network [OSTI]

. environmental air pollution which has gained rapidly increasing attention by many European research projects million time series, each representing the daily course of air pollution parameters1 . It is important data mining in time series databases is essential in many application domains as for instance

Kriegel, Hans-Peter

Note: This page contains sample records for the topic "time series analysis" 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

Cliometrics and Time Series Econometrics: Some Theory and Applications  

E-Print Network [OSTI]

. Applications include a discussion of the timing and potential causes of the British Industrial Revolution, convergence, long memory, graphical modelling, British Industrial Revolution. JEL classifications N33, O47, O

Hickman, Mark

82

A Gaussian Process Based Online Change Detection Algorithm for Monitoring Periodic Time Series  

SciTech Connect (OSTI)

Online time series change detection is a critical component of many monitoring systems, such as space and air-borne remote sensing instruments, cardiac monitors, and network traffic profilers, which continuously analyze observations recorded by sensors. Data collected by such sensors typically has a periodic (seasonal) component. Most existing time series change detection methods are not directly applicable to handle such data, either because they are not designed to handle periodic time series or because they cannot operate in an online mode. We propose an online change detection algorithm which can handle periodic time series. The algorithm uses a Gaussian process based non-parametric time series prediction model and monitors the difference between the predictions and actual observations within a statistically principled control chart framework to identify changes. A key challenge in using Gaussian process in an online mode is the need to solve a large system of equations involving the associated covariance matrix which grows with every time step. The proposed algorithm exploits the special structure of the covariance matrix and can analyze a time series of length T in O(T^2) time while maintaining a O(T) memory footprint, compared to O(T^4) time and O(T^2) memory requirement of standard matrix manipulation methods. We experimentally demonstrate the superiority of the proposed algorithm over several existing time series change detection algorithms on a set of synthetic and real time series. Finally, we illustrate the effectiveness of the proposed algorithm for identifying land use land cover changes using Normalized Difference Vegetation Index (NDVI) data collected for an agricultural region in Iowa state, USA. Our algorithm is able to detect different types of changes in a NDVI validation data set (with ~80% accuracy) which occur due to crop type changes as well as disruptive changes (e.g., natural disasters).

Chandola, Varun [ORNL; Vatsavai, Raju [ORNL

2011-01-01T23:59:59.000Z

83

IMPROVED SEMI-PARAMETRIC TIME SERIES MODELS OF AIR POLLUTION AND MORTALITY  

E-Print Network [OSTI]

series analyses of air pollution and health attracted the attention of the scientific community, policy uncertainty in time series studies of air pollution and health. This discovery delayed the completion) for six "criteria" air pollutants at a level that protects the public's health (Environmental Protection

Hastie, Trevor

84

Holt’s exponential smoothing and neural network models for forecasting interval-valued time series  

Science Journals Connector (OSTI)

Interval-valued time series are interval-valued data that are collected in a chronological sequence over time. This paper introduces three approaches to forecasting interval-valued time series. The first two approaches are based on multilayer perceptron (MLP) neural networks and Holt’s exponential smoothing methods, respectively. In Holt’s method for interval-valued time series, the smoothing parameters are estimated by using techniques for non-linear optimization problems with bound constraints. The third approach is based on a hybrid methodology that combines the MLP and Holt models. The practicality of the methods is demonstrated through simulation studies and applications using real interval-valued stock market time series.

André Luis Santiago Maia; Francisco de A.T. de Carvalho

2011-01-01T23:59:59.000Z

85

Essays on Bayesian Time Series and Variable Selection  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 vi LIST OF FIGURES FIGURE Page 2.1 Dynamic Model. Given xt, yt is independent of y1:t?1, x1:t?1. . . . . . . 7 2.2 The figure shows estimated value of ? and ?2 from : (a)-(b) Stochastic Approximation approach; (c)-(d) Augmentation approach. In each... Sorenson (1970). 6 Let yt and xt be the p and q dimensional observation and hidden state variable at the time t. Let ? be set of unknown parameter. Figure (2.1) depicts the dynamic relation between yt and xt. The generalized version of state-space model can...

De, Debkumar

2014-05-08T23:59:59.000Z

86

Simulation of time series of storms and weather windows based on wind conditions data  

Science Journals Connector (OSTI)

Stated is an approach to the simulation of time series of storms and weather ... on their frequency. Using the results of wind reanalysis for the Norwegian, Barents, and ... values. Based on the revealed regulari...

S. I. Mastryukov

2013-04-01T23:59:59.000Z

87

Time-Series Classification of High-Temporal Resolution AVHRR NDVI Imagery of Mexico  

E-Print Network [OSTI]

Time-series data from wide-field sensors, acquired for the period of a growing season or longer, capitalize on phenological changes in vegetation and make it possible to identify vegetated land cover types in greater ...

Egbert, Stephen L.; Ortega-Huerta, Miguel; Martí nez-Meyer, Enrique; Price, Kevin P.; Peterson, A. Townsend

2000-01-01T23:59:59.000Z

88

Resuspension: Decadal Monitoring Time Series of the Anthropogenic Radioactivity Deposition in Japan  

Science Journals Connector (OSTI)

......2003 research-article Regular Papers Resuspension: Decadal Monitoring Time Series of...deposited materials originate from resuspension processes (soil dust suspension processes...predicted by a model that disregarded resuspension. The specific activity of 90Sr (137Cs......

Yasuhito Igarashi; Michio Aoyama; Katsumi Hirose; Takashi Miyao; Kazuhiro Nemoto; Masatoshi Tomita; Takashi Fujikawa

2003-12-01T23:59:59.000Z

89

A Clustering Model for Mining Consumption Patterns from Imprecise Electric Load Time Series Data  

Science Journals Connector (OSTI)

This paper presents a novel clustering model for mining patterns from imprecise electric load time series. The model consists of three components. First, it contains a process that deals with representation an...

Qiudan Li; Stephen Shaoyi Liao; Dandan Li

2006-01-01T23:59:59.000Z

90

INCORPORATING NATURAL VARIATION INTO TIME SERIES-BASED LAND COVER CHANGE IDENTIFICATION  

E-Print Network [OSTI]

INCORPORATING NATURAL VARIATION INTO TIME SERIES-BASED LAND COVER CHANGE IDENTIFICATION VARUN in forests. The bulk of work in identifying land cover changes using remote sensing data involves image

Minnesota, University of

91

iSAX: disk-aware mining and indexing of massive time series datasets  

E-Print Network [OSTI]

Aggregate Approximation (PAA) (Keogh et al. 2001a), Adaptiveconverted into a representation called PAA (Keogh et al.2001a). PAA represents a time series T of length n in a w-

Shieh, Jin; Keogh, Eamonn

2009-01-01T23:59:59.000Z

92

The relation between Brazilian and Chicago Board of Trade soybean prices: a time series test  

E-Print Network [OSTI]

THE RELATION BETWEEN BRAZILIAN AND CHICAGO BOARD OF TRADE SOYBEAN PRICES ? A TIME SERIES TEST A Thesis BRUNO MELCHER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1991 Major Subject: Agricultural Economics THE RELATION BETWEEN BRAZILIAN AND CHICAGO BOARD OF TRADE SOYBEAN PRICES ? A TIME SERIES TEST A Thesis by BRUNO MELCHER Approved as to style and content by: ' f J David...

Melcher, Bruno

1991-01-01T23:59:59.000Z

93

Highly comparative time-series analysis: the empirical structure of time series and their methods  

Science Journals Connector (OSTI)

...the dataset in the space of well-behaved...large and diverse library of operations...principal components space of operations...operations in our library each individually...principal components space of our library of operations...

2013-01-01T23:59:59.000Z

94

SOLAR CYCLE VARIABILITY AND SURFACE DIFFERENTIAL ROTATION FROM Ca II K-LINE TIME SERIES DATA  

SciTech Connect (OSTI)

Analysis of over 36 yr of time series data from the NSO/AFRL/Sac Peak K-line monitoring program elucidates 5 components of the variation of the 7 measured chromospheric parameters: (a) the solar cycle (period {approx} 11 yr), (b) quasi-periodic variations (periods {approx} 100 days), (c) a broadband stochastic process (wide range of periods), (d) rotational modulation, and (e) random observational errors, independent of (a)-(d). Correlation and power spectrum analyses elucidate periodic and aperiodic variation of these parameters. Time-frequency analysis illuminates periodic and quasi-periodic signals, details of frequency modulation due to differential rotation, and in particular elucidates the rather complex harmonic structure (a) and (b) at timescales in the range {approx}0.1-10 yr. These results using only full-disk data suggest that similar analyses will be useful for detecting and characterizing differential rotation in stars from stellar light curves such as those being produced by NASA's Kepler observatory. Component (c) consists of variations over a range of timescales, in the manner of a 1/f random process with a power-law slope index that varies in a systematic way. A time-dependent Wilson-Bappu effect appears to be present in the solar cycle variations (a), but not in the more rapid variations of the stochastic process (c). Component (d) characterizes differential rotation of the active regions. Component (e) is of course not characteristic of solar variability, but the fact that the observational errors are quite small greatly facilitates the analysis of the other components. The data analyzed in this paper can be found at the National Solar Observatory Web site http://nsosp.nso.edu/cak{sub m}on/, or by file transfer protocol at ftp://ftp.nso.edu/idl/cak.parameters.

Scargle, Jeffrey D.; Worden, Simon P. [NASA Ames Research Center, Moffett Field, CA, 94035 (United States); Keil, Stephen L. [National Solar Observatory, P.O. Box 57, Sunspot, NM 88349 (United States)

2013-07-01T23:59:59.000Z

95

Van Giang Tran, Stphane Grieu and Monique Polit Time series and neural networks for short-  

E-Print Network [OSTI]

on integrating a forecast module based on the present work in a virtual power plant. Keywords. Short-time electric consumption, time series, Kohonen self- organizing map, multi-level perceptron, virtual power plant. 1. Introduction Managing energy demand, extending supply and production sources, developing

Paris-Sud XI, Université de

96

Characterizing system dynamics with a weighted and directed network constructed from time series data  

SciTech Connect (OSTI)

In this work, we propose a novel method to transform a time series into a weighted and directed network. For a given time series, we first generate a set of segments via a sliding window, and then use a doubly symbolic scheme to characterize every windowed segment by combining absolute amplitude information with an ordinal pattern characterization. Based on this construction, a network can be directly constructed from the given time series: segments corresponding to different symbol-pairs are mapped to network nodes and the temporal succession between nodes is represented by directed links. With this conversion, dynamics underlying the time series has been encoded into the network structure. We illustrate the potential of our networks with a well-studied dynamical model as a benchmark example. Results show that network measures for characterizing global properties can detect the dynamical transitions in the underlying system. Moreover, we employ a random walk algorithm to sample loops in our networks, and find that time series with different dynamics exhibits distinct cycle structure. That is, the relative prevalence of loops with different lengths can be used to identify the underlying dynamics.

Sun, Xiaoran, E-mail: sxr0806@gmail.com [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China) [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China); School of Mathematics and Statistics, The University of Western Australia, Crawley WA 6009 (Australia); Small, Michael, E-mail: michael.small@uwa.edu.au [School of Mathematics and Statistics, The University of Western Australia, Crawley WA 6009 (Australia)] [School of Mathematics and Statistics, The University of Western Australia, Crawley WA 6009 (Australia); Zhao, Yi [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China)] [Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China); Xue, Xiaoping [Department of Mathematics, Harbin Institute of Technology, Harbin 150025 (China)] [Department of Mathematics, Harbin Institute of Technology, Harbin 150025 (China)

2014-06-15T23:59:59.000Z

97

Time Series Evaluation of Radiation Portal Monitor Data for Point Source Detection  

SciTech Connect (OSTI)

The time series of data from a Radiation Portal Monitor (RPM) system are evaluated for the presence of point sources by isolating the contribution of anomalous radiation. Energy-windowed background spectra taken from the RPM are compared with the observed spectra at each time step during a vehicle drive-through. The total signal is turned into a spectral distance index using this method. This provides a time series with reduced systematic fluctuations due to background attenuation by the vehicle, and allows for point source detection by time-series analyses. The anomalous time series is reanalyzed by using a wavelet filter function of similar size to the expected source profile. A number of real drive-through data sets taken at a U.S. port of entry are analyzed in this way. A set of isotopes are injected into the data set, and the resultant benign and injected data sets are analyzed with gross-counting, spectral-ratio, and time-based algorithms. Spectral and time methods together offer a significant increase to detection performance.

Robinson, Sean M.; Bender, Sarah E.; Flumerfelt, Eric L.; Lopresti, Charles A.; Woodring, Mitchell L.

2009-12-08T23:59:59.000Z

98

Six-Week Time Series Of Eddy Covariance Co2 Flux At Mammoth Mountain,  

Open Energy Info (EERE)

Six-Week Time Series Of Eddy Covariance Co2 Flux At Mammoth Mountain, Six-Week Time Series Of Eddy Covariance Co2 Flux At Mammoth Mountain, California- Performance Evaluation And Role Of Meteorological Forcing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Six-Week Time Series Of Eddy Covariance Co2 Flux At Mammoth Mountain, California- Performance Evaluation And Role Of Meteorological Forcing Details Activities (1) Areas (1) Regions (0) Abstract: CO2 and heat fluxes were measured over a six-week period (09/08/2006 to 10/24/2006) by the eddy covariance (EC) technique at the Horseshoe Lake tree kill (HLTK), Mammoth Mountain, CA, a site with complex terrain and high, spatially heterogeneous CO2 emission rates. EC CO2 fluxes ranged from 218 to 3500 g m- 2 d- 1 (mean = 1346 g m- 2 d- 1). Using footprint modeling, EC CO2 fluxes were compared to CO2 fluxes measured by

99

Intervention adjustment to data of the joint petroleum reporting system. [1976 to 1983 time series; USA  

SciTech Connect (OSTI)

This report deals specifically with changes made to the survey forms in January 1981 and the resulting changes to the data-time series. Naturally, when a series has changed at some time point, the data after the change are no longer comparable to those before. In many cases, though, comparisons are desired that use pre- and post-intervention data as a series. It is thus necessary to have a methodology for updating the older data so that such comparisons can be made validly. To produce this methodology, the particular intervention must be modeled. However, when attempting to analyze one particular intervention, other types of interventions must be considered also. If effects of the other interventions can be modeled, the overall variability of the series can be reduced and the intervention of interest can be better isolated. Thus, in the following, we discuss (in addition to the format modifications of the forms) the trends and changes noted in the JPRS since January 1976 to December 1982. The year 1976 was chosen since it corresponds to the first year for which microdata are computerized in a universal format in the JPRS master files. We discuss, in particular, changes to the data series for inventories of: (a) motor gasoline, (b) distillate oil, (c) residual fuel oil, and (d) crude oil. These are the series studied in detail in subsequent sections of this report.

Hall, D.L.; Gardenier, T.K.; Slavich, A.L.

1984-10-01T23:59:59.000Z

100

Time Series Prediction by Chaotic Modeling of Nonlinear Dynamical Systems Arslan Basharat+  

E-Print Network [OSTI]

Inc. Clifton Park, NY, USA arslan.basharat@kitware.com Mubarak Shah+ + University of Central Florida Orlando, FL, USA shah@cs.ucf.edu Abstract We use concepts from chaos theory in order to model nonlinear dynamical systems that exhibit deterministic be- havior. Observed time series from such a system can be em

Central Florida, University of

Note: This page contains sample records for the topic "time series analysis" 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

DGRC AskCal: Natural Language Question Answering for Energy Time Series  

E-Print Network [OSTI]

DGRC AskCal: Natural Language Question Answering for Energy Time Series Andrew Philpot, Jose Luis Ambite, Eduard Hovy Digital Government Research Center USC/Information Sciences Institute 4676 Admiralty Way Marina del Rey, CA 90292-6695 {philpot,ambite,hovy}@isi.edu Abstract Even quite sophisticated

Ambite, José Luis

102

Evolutionary multi-objective generation of recurrent neural network ensembles for time series prediction  

Science Journals Connector (OSTI)

Ensembles have been shown to provide better generalization performance than single models. However, the creation, selection and combination of individual predictors is critical to the success of an ensemble, as each individual model needs to be both ... Keywords: Ensembles, Hybrid multi-objective evolutionary algorithms, Recurrent neural networks, Selection, Time series prediction

Christopher Smith, Yaochu Jin

2014-11-01T23:59:59.000Z

103

Time Series Measurements of Temperature, Current Velocity, and Sediment Resuspension in Saginaw Bay  

E-Print Network [OSTI]

Time Series Measurements of Temperature, Current Velocity, and Sediment Resuspension in Saginaw Bay and verification. These measurements will be made as part of this project. Measurements of sediment resuspension sediment resuspension in the bay during the spring. Measurements of sediment resuspension are important

104

How to Describe and Propagate Uncertainty When Processing Time Series: Metrological and  

E-Print Network [OSTI]

, Aline Jaimes, Craig Tweedie, and Vladik Kreinovich Abstract Time series comes from measurements, and measurements are never abso- lutely accurate. Traditionally, when we deal with an individual measurement or with a sample of measurement results, we subdivide a measurement error into random and systematic components

Ward, Karen

105

Recognising Visual Patterns to Communicate Gas Turbine Time-Series Data  

E-Print Network [OSTI]

Recognising Visual Patterns to Communicate Gas Turbine Time-Series Data Jin Yu, Jim Hunter, Ehud analogue channels are sampled once per second and archived by the Tiger system for monitoring gas turbines that it is very important to identify such patterns in any attempt at summarisation. In the gas turbine domain

Reiter, Ehud

106

DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES Simon Hoell, Piotr Omenzetter  

E-Print Network [OSTI]

DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES METHODS Simon Hoell, Piotr Omenzetter, the consequences are growing sizes of wind turbines (WTs) and erections in remote places, such as off in the past years, thus efficient energy harvesting becomes more important. For the sector of wind energy

Boyer, Edmond

107

Time-series comparisons of MIPAS Level 2 products with climatology  

E-Print Network [OSTI]

Time-series comparisons of MIPAS Level 2 products with climatology V. Payne, A. Dudhia, C. Piccolo) for the calculation of the means. Here we compare these monthly means with reference climatologies for each that MIPAS has been operating. The reference climatologies used in these comparisons are the COSPAR Reference

Oxford, University of

108

Time Series Methods for ForecastingElectricityMarket Pricing Zoran Obradovic Kevin Tomsovic  

E-Print Network [OSTI]

Time Series Methods for ForecastingElectricityMarket Pricing Zoran Obradovic Kevin Tomsovic PO Box the predictability of electricity price under new market regulations and the engineering aspects of large scale of traditional commodities, such as,oil or agricultural products. Clearly, assessing the effectiveness

Obradovic, Zoran

109

End-to-end aggregate authentication of time-series data  

Science Journals Connector (OSTI)

We consider the problem of providing integrity of aggregate result in the presence of an untrusted data aggregator who may introduce errors into data fusion, causing the final aggregate result to far deviate from the true result determined by participating ... Keywords: aggregate authentication, computation over authenticated data, time-series

Di Ma; Yan Zhu; Mengyang Yu

2013-05-01T23:59:59.000Z

110

The 30-year TAMSAT African Rainfall Climatology1 And Time-series (TARCAT) Dataset  

E-Print Network [OSTI]

Page 1 The 30-year TAMSAT African Rainfall Climatology1 And Time-series (TARCAT) Dataset 2 Authors 2 Key points1 Development of a satellite based 30 year rainfall dataset for Africa2 The dataset has been designed to be temporally consistency3 The dataset skilfully captures interannual

Allan, Richard P.

111

Time-series validation of MODIS land biophysical products in a Kalahari woodland, Africa  

E-Print Network [OSTI]

Time-series validation of MODIS land biophysical products in a Kalahari woodland, Africa K. F MODIS variables are produced from the same algorithm. Solar zenith angle effects, differences between counts versus energy) were examined and rejected as explanations for the discrepancies between MODIS

Myneni, Ranga B.

112

Indexing of Time Series by Major Minima and Maxima Eugene Fink  

E-Print Network [OSTI]

sets: stock prices, air and sea temperatures, and wind speeds. Keywords: Compression, indexing.ics.uci.edu). Wind speeds: We have used daily wind speeds at twelve sites in Ireland, from 1961 to 1978, ob- tained. Indexing: The indexing of a time-series database is based on the notion of major inclines, illustrated

Fink, Eugene

113

Indexing of Time Series by Major Minima and Maxima Eugene Fink  

E-Print Network [OSTI]

sets: stock prices, air and sea temperatures, and wind speeds. Keywords: Compression, indexing.ics.uci.edu). Wind speeds: We have used daily wind speeds at twelve sites in Ireland, from 1961 to 1978, ob­ tained. Indexing: The indexing of a time­series database is based on the notion of major inclines, illustrated

Fink, Eugene

114

Generating English Summaries of Time Series Data Using the Gricean Maxims  

E-Print Network [OSTI]

, gas-turbine sensor readings, and hospital intensive care data. Our weather-forecast generator, Scotland, U.K. +44 (0) 1224 272295 {ssripada,ereiter,jhunter,jyu}@csd.abdn.ac.uk ABSTRACT We are developing technology for generating English textual summaries of time-series data, in three domains: weather forecasts

Sripada, Yaji

115

EnergyPlus Run Time Analysis  

E-Print Network [OSTI]

Tree Lawrence Berkeley National Laboratory  Page 37  California EnergyEnergy Commission EnergyPlus Run Time Analysis Plant Supply Calling Tree (Energy Commission EnergyPlus Run Time Analysis Appendix A – EnergyPlus Call Tree

Hong, Tianzhen

2009-01-01T23:59:59.000Z

116

Power spectrum analysis of the annual rainfall series for Massachusetts (NE, U.S.A.)  

Science Journals Connector (OSTI)

Maximum Entropy Spectral Analysis of the annual rainfall series for 1887–1976 (90 years) for Massachusetts (northeastern USA.) shows T...= 17.8 (very near the 18.6 year luni-solar signal) as the most prominent pe...

R. P. Kane; N. R. Teixeira

1991-01-01T23:59:59.000Z

117

MODIS NDVI time-series allow the monitoring of Eucalyptus plantation biomass  

Science Journals Connector (OSTI)

The use of remote sensing is necessary for monitoring forest carbon stocks at large scales. Optical remote sensing, although not the most suitable technique for the direct estimation of stand biomass, offers the advantage of providing large temporal and spatial datasets. In particular, information on canopy structure is encompassed in stand reflectance time series. This study focused on the example of Eucalyptus forest plantations, which have recently attracted much attention as a result of their high expansion rate in many tropical countries. Stand scale time-series of Normalized Difference Vegetation Index (NDVI) were obtained from MODIS satellite data after a procedure involving un-mixing and interpolation, on about 15,000 ha of plantations in southern Brazil. The comparison of the planting date of the current rotation (and therefore the age of the stands) estimated from these time series with real values provided by the company showed that the root mean square error was 35.5 days. Age alone explained more than 82% of stand wood volume variability and 87% of stand dominant height variability. Age variables were combined with other variables derived from the NDVI time series and simple bioclimatic data by means of linear (Stepwise) or nonlinear (Random Forest) regressions. The nonlinear regressions gave r-square values of 0.90 for volume and 0.92 for dominant height, and an accuracy of about 25 m3/ha for volume (15% of the volume average value) and about 1.6 m for dominant height (8% of the height average value). The improvement including NDVI and bioclimatic data comes from the fact that the cumulative NDVI since planting date integrates the interannual variability of leaf area index (LAI), light interception by the foliage and growth due for example to variations of seasonal water stress. The accuracy of biomass and height predictions was strongly improved by using the NDVI integrated over the two first years after planting, which are critical for stand establishment. These results open perspectives for cost-effective monitoring of biomass at large scales in intensively-managed plantation forests.

Guerric le Maire; Claire Marsden; Yann Nouvellon; Clovis Grinand; Rodrigo Hakamada; José-Luiz Stape; Jean-Paul Laclau

2011-01-01T23:59:59.000Z

118

A Software Tool for Processing the Displacement Time Series Extracted from Raw Radar Data  

SciTech Connect (OSTI)

The application of high-resolution radar waveform and interferometric principles recently led to the development of a microwave interferometer, suitable to simultaneously measuring the (static or dynamic) deflection of several points on a large structure. From the technical standpoint, the sensor is a Stepped Frequency Continuous Wave (SF-CW), coherent radar, operating in the K{sub u} frequency band.In the paper, the main procedures adopted to extract the deflection time series from raw radar data and to assess the quality of data are addressed, and the MATLAB toolbox developed is described. Subsequently, other functions implemented in the software tool (e.g. evaluation of the spectral matrix of the deflection time-histories, identification of natural frequencies and operational mode shapes evaluation) are described and the application to data recorded on full-scale bridges is exemplified.

Coppi, Francesco; Paolo Ricci, Pier [IDS Ingegneria Dei Sistemi S.p.A., Pisa (Italy); Gentile, Carmelo [Politecnico di Milano, Dept. of Structural Engineering, Milan (Italy)

2010-05-28T23:59:59.000Z

119

Shock timing on the National Ignition Facility: the first precision tuning series  

SciTech Connect (OSTI)

Ignition implosions on the National Ignition Facility (NIF) [Lindl et al., Phys. Plasmas 11, 339 (2004)] are driven with a very carefully tailored sequence of four shock waves that must be timed to very high precision in order to keep the fuel on a low adiabat. The first series of precision tuning experiments on NIF have been performed. These experiments use optical diagnostics to directly measure the strength and timing of all four shocks inside the hohlraum-driven, cryogenic deuterium-filled capsule interior. The results of these experiments are presented demonstrating a significant decrease in the fuel adiabat over previously un-tuned implosions. The impact of the improved adiabat on fuel compression is confirmed in related deuterium-tritium (DT) layered capsule implosions by measurement of fuel areal density (rR), which show the highest fuel compression (rR {approx} 1.0 g/cm{sup 2}) measured to date.

Robey, H F; Celliers, P M; Kline, J L; Mackinnon, A J

2011-10-27T23:59:59.000Z

120

Glacier mass balance determination by Remote Sensing in the French Alps: Progress and limitation for time series monitoring  

E-Print Network [OSTI]

is the activity coefficient (db/dz) for the annual mass balance calculation. Comparison between measured velocity, mass balance calculation from area outline of exposed ice and ELA time series. The output

Rabatel, Antoine

Note: This page contains sample records for the topic "time series analysis" 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

Forecasting intraday time series with multiple seasonal cycles using parsimonious seasonal exponential smoothing  

Science Journals Connector (OSTI)

This paper concerns the forecasting of seasonal intraday time series that exhibit repeating intraweek and intraday cycles. A recently proposed exponential smoothing method involves smoothing a different intraday cycle for each distinct type of day of the week. Similar days are allocated identical intraday cycles. A limitation is that the method allows only whole days to be treated as identical. We introduce a new exponential smoothing formulation that allows parts of different days of the week to be treated as identical. The result is a method that involves the smoothing and initialisation of fewer terms. We evaluate forecasting up to a day ahead using two empirical studies. For electricity load data, the new method compares well with a range of alternatives. The second study involves a series of arrivals at a call centre that is open for a shorter duration at the weekends than on weekdays. Among the variety of methods considered, the new method is the only one that can model in a satisfactory way in this situation, where the number of periods on each day of the week is not the same.

James W. Taylor; Ralph D. Snyder

2012-01-01T23:59:59.000Z

122

Studying complex tourism systems: a novel approach based on networks derived from a time series  

E-Print Network [OSTI]

A tourism destination is a complex dynamic system. As such it requires specific methods and tools to be analyzed and understood in order to better tailor governance and policy measures for steering the destination along an evolutionary growth path. Many proposals have been put forward for the investigation of complex systems and some have been successfully applied to tourism destinations. This paper uses a recent suggestion, that of transforming a time series into a network and analyzes it with the objective of uncovering the structural and dynamic features of a tourism destination. The algorithm, called visibility graph, is simple and its implementation straightforward, yet it is able to provide a number of interesting insights. An example is worked out using data from two destinations: Italy as a country and the island of Elba, one of its most known areas.

Baggio, Rodolfo

2013-01-01T23:59:59.000Z

123

Univariate time-series forecasting of monthly peak demand of electricity in northern India  

Science Journals Connector (OSTI)

This study forecasts the monthly peak demand of electricity in the northern region of India using univariate time-series techniques namely Multiplicative Seasonal Autoregressive Integrated Moving Average (MSARIMA) and Holt-Winters Multiplicative Exponential Smoothing (ES) for seasonally unadjusted monthly data spanning from April 2000 to February 2007. In-sample forecasting reveals that the MSARIMA model outperforms the ES model in terms of lower root mean square error, mean absolute error and mean absolute percent error criteria. It has been found that ARIMA (2, 0, 0) (0, 1, 1)12 is the best fitted model to explain the monthly peak demand of electricity, which has been used to forecast the monthly peak demand of electricity in northern India, 15 months ahead from February 2007. This will help Northern Regional Load Dispatch Centre to make necessary arrangements a priori to meet the future peak demand.

Sajal Ghosh

2008-01-01T23:59:59.000Z

124

A hybrid dynamic and fuzzy time series model for mid-term power load forecasting  

Science Journals Connector (OSTI)

Abstract A new hybrid model for forecasting the electric power load several months ahead is proposed. To allow for distinct responses from individual load sectors, this hybrid model, which combines dynamic (i.e., air temperature dependency of power load) and fuzzy time series approaches, is applied separately to the household, public, service, and industrial sectors. The hybrid model is tested using actual load data from the Seoul metropolitan area, and its predictions are compared with those from two typical dynamic models. Our investigation shows that, in the case of four-month forecasting, the proposed model gives the actual monthly power load of every sector with only less than 3% absolute error and satisfactory reduction of forecasting errors compared to other models from previous studies.

Woo-Joo Lee; Jinkyu Hong

2015-01-01T23:59:59.000Z

125

Forecasting of preprocessed daily solar radiation time series using neural networks  

SciTech Connect (OSTI)

In this paper, we present an application of Artificial Neural Networks (ANNs) in the renewable energy domain. We particularly look at the Multi-Layer Perceptron (MLP) network which has been the most used of ANNs architectures both in the renewable energy domain and in the time series forecasting. We have used a MLP and an ad hoc time series pre-processing to develop a methodology for the daily prediction of global solar radiation on a horizontal surface. First results are promising with nRMSE {proportional_to} 21% and RMSE {proportional_to} 3.59 MJ/m{sup 2}. The optimized MLP presents predictions similar to or even better than conventional and reference methods such as ARIMA techniques, Bayesian inference, Markov chains and k-Nearest-Neighbors. Moreover we found that the data pre-processing approach proposed can reduce significantly forecasting errors of about 6% compared to conventional prediction methods such as Markov chains or Bayesian inference. The simulator proposed has been obtained using 19 years of available data from the meteorological station of Ajaccio (Corsica Island, France, 41 55'N, 8 44'E, 4 m above mean sea level). The predicted whole methodology has been validated on a 1.175 kWc mono-Si PV power grid. Six prediction methods (ANN, clear sky model, combination..) allow to predict the best daily DC PV power production at horizon d + 1. The cumulated DC PV energy on a 6-months period shows a great agreement between simulated and measured data (R{sup 2} > 0.99 and nRMSE < 2%). (author)

Paoli, Christophe; Muselli, Marc; Nivet, Marie-Laure [University of Corsica, CNRS UMR SPE, Corte (France); Voyant, Cyril [University of Corsica, CNRS UMR SPE, Corte (France); Hospital of Castelluccio, Radiotherapy Unit, Ajaccio (France)

2010-12-15T23:59:59.000Z

126

A measurement error model for time-series studies of air pollution and mortality  

Science Journals Connector (OSTI)

......time indoors, 7 .2% in or near vehicles, and only 5 .6% outdoors. Consequently...rather than individual, data in an ecological analysis like ours. It will likely...and policies of the EPA, or motor vehicle or engine manufacturers. The authors......

Francesca Dominici; Scott L. Zeger; Jonathan M. Samet

2000-06-01T23:59:59.000Z

127

Fractal analysis of time varying data  

DOE Patents [OSTI]

Characteristics of time varying data, such as an electrical signal, are analyzed by converting the data from a temporal domain into a spatial domain pattern. Fractal analysis is performed on the spatial domain pattern, thereby producing a fractal dimension D.sub.F. The fractal dimension indicates the regularity of the time varying data.

Vo-Dinh, Tuan (Knoxville, TN); Sadana, Ajit (Oxford, MS)

2002-01-01T23:59:59.000Z

128

Convergence Analysis of the Summation of the Euler Series by Padé Approximants and the Delta Transformation  

E-Print Network [OSTI]

Sequence transformations are valuable numerical tools that have been used with considerable success for the acceleration of convergence and the summation of diverging series. However, our understanding of their theoretical properties is far from satisfactory. The Euler series $\\mathcal{E}(z) \\sim \\sum_{n=0}^{\\infty} (-1)^n n! z^n$ is a very important model for the ubiquitous factorially divergent perturbation expansions in physics. In this article, we analyze the summation of the Euler series by Pad\\'e approximants and the delta transformation [E. J. Weniger, Comput. Phys. Rep. Vol.10, 189 (1989), Eq. (8.4-4)] which is a powerful nonlinear Levin-type transformation that works very well in the case of strictly alternating convergent or divergent series. Our analysis is based on a new factorial series representation of the truncation error of the Euler series [R. Borghi, Appl. Num. Math. Vol.60, 1242 (2010)]. We derive explicit expressions for the transformation errors of Pad\\'e approximants and of the delta transformation. A subsequent asymptotic analysis proves \\emph{rigorously} the convergence of both Pad\\'e and delta. Our asymptotic estimates clearly show the superiority of the delta transformation over Pad\\'e. This is in agreement with previous numerical results.

Riccardo Borghi; Ernst Joachim Weniger

2014-05-10T23:59:59.000Z

129

3D analysis of the performances degradation caused by series resistance in concentrator solar cells  

SciTech Connect (OSTI)

This paper deals with the modeling of series resistance components in silicon concentrator solar cells. The main components of the macroscopic series resistance are analyzed by means of one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) numerical simulations. It is shown that the contribution of the lateral current flux, flowing along the emitter region, and of the transverse current flux, flowing along the metal grid, cannot be neglected and, hence, the operation of solar cells subjected to high current densities cannot be described by simple one-dimensional models. The percentage weight of 2D and 3D components on the total value of the series resistance is evaluated and rules for the proper design of the cell geometries are given. An analysis of the effectiveness of the most popular methods for the extraction of the series resistance from the I-V curves of solar cells is also proposed. (author)

Daliento, Santolo [Department of Electronic Engineering and TLC, University of Naples ''Federico II'', Via Claudio 21, 80125 Napoli (Italy); Lancellotti, Laura [ENEA Research Center, Localita Granatello, 80055 Portici (Italy)

2010-01-15T23:59:59.000Z

130

IGR For GR/M76881/01: Generating Summaries of Time-Series Data (SumTime) Background/Context  

E-Print Network [OSTI]

of numerical time-series data. The modern world is being flooded with such data. For example, a typical gas-turbine summaries of data currently must be written by people. The goal of SumTime was to develop technology worked in three domains: weather forecasts, summaries of gas-turbine sensor data, and summaries of sensor

Sripada, Yaji

131

Development of periodic response factors for use with the radiant time series method  

SciTech Connect (OSTI)

Harris and McQuiston (1988) developed conduction transfer function (CTF) coefficients corresponding to 41 representative wall assemblies and 42 representative roof assemblies for use with the transfer function method (TFM). They also developed a grouping procedure that allows design engineers to determine the correct representative wall or roof assembly that most closely matches a specific wall or roof assembly. The CTF coefficients and the grouping procedure have been summarized in the ASHRAE Handbook--Fundamentals (1989, 1993, 1997) and the ASHRAE Cooling and Heating Load Calculation Manual, second edition. More recently, a new, simplified design cooling load calculation procedure, the radiant time series method (RTSM), has been developed. The RTSM uses periodic response factors to model transient conductive heat transfer. While not a true manual load calculation procedure, it is quite feasible to implement the RTSM in a spreadsheet. To be useful in such an environment, it would be desirable to have a pre-calculated set of periodic response factors. Accordingly, a set of periodic response factors has been calculated and is presented in this paper.

Spitler, J.D.; Fisher, D.E.

1999-07-01T23:59:59.000Z

132

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

E-Print Network [OSTI]

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

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

2000-04-06T23:59:59.000Z

133

JMLR: Workshop and Conference Proceedings 12 (2011) 115139 Causality in Time Series Time Series Analysis with the Causality Workbench  

E-Print Network [OSTI]

, smoking and coughing might be both predictive of respiratory disease and helpful for diagnosis purposes. However, if smoking is a cause and coughing a conse- quence, acting on the cause (smoking) can change your health status, but not acting on the symptom or consequence (coughing). Thus it is extremely important

Statnikov, Alexander

134

Timing analysis of PWR fuel pin failures  

SciTech Connect (OSTI)

This report discusses research conducted to develop and demonstrate a methodology for calculation of the time interval between receipt of the containment isolation signals and the first fuel pin failure for loss-of-coolant accidents (LOCAs). Demonstration calculations were performed for a Babcock and Wilcox (B W) design (Oconee) and a Westinghouse (W) four-loop design (Seabrook). Sensitivity studies were performed to assess the impacts of fuel pin burnup, axial peaking factor, break size, emergency core cooling system availability, and main coolant pump trip on these times. The analysis was performed using the following codes: FRAPCON-2, for the calculation of steady-state fuel behavior; SCDAP/RELAP5/MOD3 and TRACPF1/MOD1, for the calculation of the transient thermal-hydraulic conditions in the reactor system; and FRAP-T6, for the calculation of transient fuel behavior. In addition to the calculation of fuel pin failure timing, this analysis provides a comparison of the predicted results of SCDAP/RELAP5/MOD3 and TRAC-PF1/MOD1 for large-break LOCA analysis. Using SCDAP/RELAP5/MOD3 thermal-hydraulic data, the shortest time intervals calculated between initiation of containment isolation and fuel pin failure are 10.4 seconds and 19.1 seconds for the B W and W plants, respectively. Using data generated by TRAC-PF1/MOD1, the shortest intervals are 10.3 seconds and 29.1 seconds for the B W and W plants, respectively. These intervals are for a double-ended, offset-shear, cold leg break, using the technical specification maximum peaking factor and applied to fuel with maximum design burnup. Using peaking factors commensurate with actual burnups would result in longer intervals for both reactor designs. This document provides appendices K and L of this report which provide plots for the timing analysis of PWR fuel pin failures for Oconee and Seabrook respectively.

Jones, K.R.; Wade, N.L.; Katsma, K.R.; Siefken, L.J. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Straka, M. (Halliburton NUS, Idaho Falls, ID (United States))

1992-09-01T23:59:59.000Z

135

Reconstructing long time series of burned areas in arid grasslands of southern Russia by satellite remote sensing  

E-Print Network [OSTI]

Reconstructing long time series of burned areas in arid grasslands of southern Russia by satellite of Sciences, 33 Leninskiy prospect, Moscow, 119071 Russia a b s t r a c ta r t i c l e i n f o Article history: AVHRR MODIS RESURS Landsat Burned area mapping Southern Russia Arid grasslands Grazing Fire

Radeloff, Volker C.

136

Improved one day-ahead price forecasting using combined time series and artificial neural network models for the electricity market  

Science Journals Connector (OSTI)

The price forecasts embody crucial information for generators when planning bidding strategies to maximise profits. Therefore, generation companies need accurate price forecasting tools. Comparison of neural network and auto regressive integrated moving average (ARIMA) models to forecast commodity prices in previous researches showed that the artificial neural network (ANN) forecasts were considerably more accurate than traditional ARIMA models. This paper provides an accurate and efficient tool for short-term price forecasting based on the combination of ANN and ARIMA. Firstly, input variables for ANN are determined by time series analysis. This model relates the current prices to the values of past prices. Secondly, ANN is used for one day-ahead price forecasting. A three-layered feed-forward neural network algorithm is used for forecasting next-day electricity prices. The ANN model is then trained and tested using data from electricity market of Iran. According to previous studies, in the case of neural networks and ARIMA models, historical demand data do not significantly improve predictions. The results show that the combined ANNâ??ARIMA forecasts prices with high accuracy for short-term periods. Also, it is shown that policy-making strategies would be enhanced due to increased precision and reliability.

Ali Azadeh; Seyed Farid Ghaderi; Behnaz Pourvalikhan Nokhandan; Shima Nassiri

2011-01-01T23:59:59.000Z

137

Forecasting aggregate time series with intermittent subaggregate components: top-down versus bottom-up forecasting  

Science Journals Connector (OSTI)

......optimum value through a grid-search algorithm...method outperformed TD for estimating the aggregate data series...variable, there is no benefit of forecasting each subaggregate...forecasting strategies in estimating the `component'-level...WILLEMAIN, T. R., SMART, C. N., SHOCKOR......

S. Viswanathan; Handik Widiarta; Rajesh Piplani

2008-07-01T23:59:59.000Z

138

Detectability of deterministic non-linear processes in Earth rotation time-series—I. Embedding  

Science Journals Connector (OSTI)

......of independent arguments can help to decide about the stochastic or deterministic nature of the data source. We have to pro-ceed with caution when dealing with empirical data as the corresponding series is finite in length, sampled at a finite rate, contaminated......

V. Frede; P. Mazzega

1999-05-01T23:59:59.000Z

139

WBI Ceilometer/MLH andWBI Ceilometer/MLH and CO2 Time Series  

E-Print Network [OSTI]

99 m 420 460 mole/mole 99 m 379 m 340 380 CO2um Time where tower levels 1&2 become well mixed Time/mole 99 m 379 m 340 380 CO2um Time where tower levels 1&2 become well mixed Time where tower levels 1 379 m 340 380 CO2um Time where tower levels 1&2 become well mixed Time where tower levels 1-3 become

Stanier, Charlie

140

Fluorescence spectrum analysis using Fourier series modeling for Fluorescein solution in Ethanol  

E-Print Network [OSTI]

We have measured the fluorescence spectrum for fluorescein solution in ethanol with concentration 1 {\\times} 10-3 mol/liter at different temperatures from room temperature to freezing point of solvent, (T = 153, 183, 223, 253, and 303 K) using liquid nitrogen. Table curve 2D version 5.01 program has been used to determine the fitting curve and fitting equation for each fluorescence spectrum. Fourier series (3 {\\times} 2) was the most suitable fitting equation for all spectra. Theoretical fluorescence spectrum of fluorescein in ethanol at T = 183K was calculated and compared with experimental fluorescence spectrum at the same temperature. There is a good similarity between them.

Hadi, Mahasin F

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Devils staircase like behavior of the range of random time series associated with the tangled nature of evolution  

E-Print Network [OSTI]

We present empirical evidence that the range of random time series associated with the tangled nature model of evolution exhibits a devils staircase like behavior characterized by logarithmic trend and the universal multi-affine spectrum of scaling exponents xi_c of q leq q_c moments of q-order height-height correlations, whereas for q > q_c the moments behaves logarithmically.

Balankin, A S; Balankin, Alexander S.

2005-01-01T23:59:59.000Z

142

Virtual dynamic balancing method without trial weights for multi-rotor series shafting based on finite element model analysis  

Science Journals Connector (OSTI)

The traditional influence coefficient dynamic balancing method for multi-rotor series shafting such as turbine-generator sets gas turbines compressor trains and others usually needs to startup many times using trial weights along the rotor. Based on finite element model analysis for the multi-rotor series shafting a virtual dynamic balancing methodology which only needs to collect data of vibration response at operating speed without trial weights is developed in this paper. According to shafting structure and operating parameters the dynamic finite element model was built by using rotor dynamics theory and finite element simulation technology. The shafting dynamic characteristics and weighted influence coefficient matrix can be gotten by exciting virtual unbalance force on the balance place correspondingly. The effectiveness and flexibility of the proposed method have been illustrated by solving a shafting dynamic balancing example with no trial weights requirements. It is believed that the new methods developed in this work will help in reducing the time and cost of the equipment manufacturer or field dynamic balancing procedures.

2014-01-01T23:59:59.000Z

143

Abstract--In this study, we analyzed a dataset of time-series vital-signs data collected by standard Propaq travel monitor  

E-Print Network [OSTI]

Abstract--In this study, we analyzed a dataset of time-series vital-signs data collected, USAMRMC, Frederick, MD 21702, and with the Nuclear Engineering Department of the University of Tennessee and diagnostic decision-aid methods, we reviewed a dataset of time-series vital-signs data measured by a standard

144

Restoration of Short Periods of Missing Energy Use and Weather Data Using Cubic Spline and Fourier Series Approaches: Qualitative Analysis  

E-Print Network [OSTI]

The paper presents seventeen approaches that use cubic splines and Fourier series for restoring short term missing data in time series of building energy use and weather data. The study is based on twenty samples of hourly data, each at least one...

Baltazar, J. C.; Claridge, D. E.

2002-01-01T23:59:59.000Z

145

Restoration of Short Periods of Missing Energy Use and Weather Data Using Cubic Spline and Fourier Series Approaches: Qualitative Analysis  

E-Print Network [OSTI]

This paper presents seventeen approaches that use cubic splines and Fourier series for restoring short term missing data in time series of building energy use and weather data. The study is based on twenty samples of hourly data, each at least one...

Baltazar-Cervantes, J. C.; Claridge, D. E.

146

Modeling of switched reluctance motor using Fourier series for performance analysis  

Science Journals Connector (OSTI)

A computational method for a performance analysis of the switched reluctance motor has been developed. Most of the papers present static characteristics such as static torque based on a finite element methodanalysis. However this method is based on a Fourier series expansion with step-by-step current-dependent adjustable coefficients. Analytical expression for the calculation of instantaneous phase inductance flux linkage co-energy and electromagnetic torque as a function of rotor position and winding current are derived. Finally the strategy to represent the winding inductance variation with position is made by approximating the actual inductance profile.

Jin Hur; Chong-Chul Kim; Dong-Seok Hyun

2003-01-01T23:59:59.000Z

147

Approximately optimum confidence bounds on series system reliability for exponential time to failure data  

Science Journals Connector (OSTI)

......exponential time to failure data NANCY R. MANN FRANK E. GRUBBS Rocketdyne, North American Rockwell Corporation U.S. Army Aberdeen...reliability for exponential time to failure data BY NANCY R. MANN Rocketdyne, North American Rockwell Corporation AND FRANK E. GRUBBS......

NANCY R. MANN; FRANK E. GRUBBS

1972-04-01T23:59:59.000Z

148

NREL: Awards and Honors - Real-Time Biomass Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Real-Time Biomass Analysis Developers: Dr. Bob Meglen, Dr. Steve Kelly, and Dr. Bonnie Hames, National Renewable Energy Laboratory. Real-Time Biomass Analysis (RTBA), is a portable...

149

Non-homogeneous hidden Markov-switching models for wind time series  

E-Print Network [OSTI]

of wind direction in [27]. However HMMs assume that the successive observations are conditionally conditions at successive time steps for the dataset considered in this work. Markov-Switching Auto

Brest, Université de

150

Extreme Value Analysis and Ventures into Space and Time  

E-Print Network [OSTI]

Extreme Value Analysis and Ventures into Space and Time 15 Center for Atmospheric Research Copyright NCAR 2013 #12;Extreme Value Analysis'arrive jamais" --Emil Gumbel Copyright NCAR 2013 Extreme Value Analysis #12;Copyright

Gilleland, Eric

151

Comparative application of artificial neural networks and genetic algorithms for multivariate time-series modelling  

E-Print Network [OSTI]

Comparative application of artificial neural networks and genetic algorithms for multivariate time of artificial neural networks and genetic algorithms in terms of forecasting and understanding of algal blooms-a, Microcystis, short-term prediction, artificial neural network model, genetic algorithm model, rule sets

Fernandez, Thomas

152

Time series study of urban rainfall suppression during clean-up periods  

E-Print Network [OSTI]

and relatively clean sites through the time range before and during their clean-up periods to see how the air quality may affect the precipitation amount. By comparing the annual precipitation amount between two polluted sites with different elevations we...

Geng, Jun

2008-10-10T23:59:59.000Z

153

Time series study of urban rainfall suppression during clean-up periods  

E-Print Network [OSTI]

and relatively clean sites through the time range before and during their clean-up periods to see how the air quality may affect the precipitation amount. By comparing the annual precipitation amount between two polluted sites with different elevations we...

Geng, Jun

2009-05-15T23:59:59.000Z

154

Creating Synthetic Wind Speed Time Series for 15 New Zealand Wind Farms  

Science Journals Connector (OSTI)

Wind data at time scales from 10 min to 1 h are an important input for modeling the performance of wind farms and their impact on many countries’ national electricity systems. Planners need long-term realistic (i.e., meteorologically spatially and ...

Richard Turner; Xiaogu Zheng; Neil Gordon; Michael Uddstrom; Greg Pearson; Rilke de Vos; Stuart Moore

2011-12-01T23:59:59.000Z

155

Sediment transport time measured with U-Series isotopes: Resultsfrom ODP North Atlantic Drill Site 984  

SciTech Connect (OSTI)

High precision uranium isotope measurements of marineclastic sediments are used to measure the transport and storage time ofsediment from source to site of deposition. The approach is demonstratedon fine-grained, late Pleistocene deep-sea sediments from Ocean DrillingProgram Site 984A on the Bjorn Drift in the North Atlantic. The sedimentsare siliciclastic with up to 30 percent carbonate, and dated by sigma 18Oof benthic foraminifera. Nd and Sr isotopes indicate that provenance hasoscillated between a proximal source during the last three interglacialperiods volcanic rocks from Iceland and a distal continental sourceduring glacial periods. An unexpected finding is that the 234U/238Uratios of the silicate portion of the sediment, isolated by leaching withhydrochloric acid, are significantly less than the secular equilibriumvalue and show large and systematic variations that are correlated withglacial cycles and sediment provenance. The 234U depletions are inferredto be due to alpha-recoil loss of234Th, and are used to calculate"comminution ages" of the sediment -- the time elapsed between thegeneration of the small (<_ 50 mu-m) sediment grains in the sourceareas by comminution of bedrock, and the time of deposition on theseafloor. Transport times, the difference between comminution ages anddepositional ages, vary from less than 10 ky to about 300 to 400 ky forthe Site 984A sediments. Long transport times may reflect prior storagein soils, on continental shelves, or elsewhere on the seafloor. Transporttime may also be a measure of bottom current strength. During the mostrecent interglacial periods the detritus from distal continental sourcesis diluted with sediment from Iceland that is rapidly transported to thesite of deposition. The comminution age approach could be used to dateQuaternary non-marine sediments, soils, and atmospheric dust, and may beenhanced by concomitant measurement of 226Ra/230Th, 230Th/234U, andcosmogenic nuclides.

DePaolo, Donald J.; Maher, Kate; Christensen, John N.; McManus,Jerry

2006-06-05T23:59:59.000Z

156

The data this time will be the Motorcycle Acceleration Data: A data frame giving a series of measurements of head acceleration  

E-Print Network [OSTI]

Cosines The data this time will be the Motorcycle Acceleration Data: A data frame giving a series of measurements of head acceleration in a simulated motorcycle accident, used to test crash helmets. Usage: data

Zeng, Donglin

157

Effect of uneven sampling on correlation dimension computed from time series data  

E-Print Network [OSTI]

Observational data, especially astrophysical data, is often limited by uneven sampling that arises due to lack of observations for a variety of reasons. Such inadvertent gaps are usually smoothed over using interpolation techniques. However the smoothing techniques can introduce artificial effects, especially when non-linear analysis is undertaken. We investigate how uneven sampling can affect the computed values of correlation dimension of the system, without using any interpolation. For this we introduce gaps artificially in synthetic data derived from standard chaotic systems, like the Rossler and Lorenz, with frequency of occurrence and size of missing data drawn from Gaussian distributions. Then we study the changes in correlation dimension with change in the distributions of frequency of gaps introduced and size of data removed. We find that for a considerable range of gap frequency and size, the value of correlation dimension is not significantly affected. This would mean that in such specific cases, the calculated values can still be reliable and acceptable. Thus our study introduces a method of checking the reliability of computed correlation dimension values by calculating the distribution of gaps with respect to its size and frequency and comparing with the standard plots presented in the paper. This is illustrated for real world examples of the data from three variable stars, R Scuti, U Monocerotis and SU Tauri. We also demonstrate how a cubic spline interpolation can cause an unevenly sampled noisy data to be misinterpreted as being chaotic in origin. This is demonstrated for the non chaotic light curve of variable star SS Cygni, which gives a saturated D2 value, when interpolated using a cubic spline.

Sandip V. George; G. Ambika; R. Misra

2014-10-16T23:59:59.000Z

158

EnergyPlus Run Time Analysis  

SciTech Connect (OSTI)

EnergyPlus is a new generation building performance simulation program offering many new modeling capabilities and more accurate performance calculations integrating building components in sub-hourly time steps. However, EnergyPlus runs much slower than the current generation simulation programs. This has become a major barrier to its widespread adoption by the industry. This paper analyzed EnergyPlus run time from comprehensive perspectives to identify key issues and challenges of speeding up EnergyPlus: studying the historical trends of EnergyPlus run time based on the advancement of computers and code improvements to EnergyPlus, comparing EnergyPlus with DOE-2 to understand and quantify the run time differences, identifying key simulation settings and model features that have significant impacts on run time, and performing code profiling to identify which EnergyPlus subroutines consume the most amount of run time. This paper provides recommendations to improve EnergyPlus run time from the modeler?s perspective and adequate computing platforms. Suggestions of software code and architecture changes to improve EnergyPlus run time based on the code profiling results are also discussed.

Hong, Tianzhen; Buhl, Fred; Haves, Philip

2008-09-20T23:59:59.000Z

159

VisIO: enabling interactive visualization of ultra-scale, time-series data via high-bandwidth distributed I/O systems  

SciTech Connect (OSTI)

Petascale simulations compute at resolutions ranging into billions of cells and write terabytes of data for visualization and analysis. Interactive visuaUzation of this time series is a desired step before starting a new run. The I/O subsystem and associated network often are a significant impediment to interactive visualization of time-varying data; as they are not configured or provisioned to provide necessary I/O read rates. In this paper, we propose a new I/O library for visualization applications: VisIO. Visualization applications commonly use N-to-N reads within their parallel enabled readers which provides an incentive for a shared-nothing approach to I/O, similar to other data-intensive approaches such as Hadoop. However, unlike other data-intensive applications, visualization requires: (1) interactive performance for large data volumes, (2) compatibility with MPI and POSIX file system semantics for compatibility with existing infrastructure, and (3) use of existing file formats and their stipulated data partitioning rules. VisIO, provides a mechanism for using a non-POSIX distributed file system to provide linear scaling of 110 bandwidth. In addition, we introduce a novel scheduling algorithm that helps to co-locate visualization processes on nodes with the requested data. Testing using VisIO integrated into Para View was conducted using the Hadoop Distributed File System (HDFS) on TACC's Longhorn cluster. A representative dataset, VPIC, across 128 nodes showed a 64.4% read performance improvement compared to the provided Lustre installation. Also tested, was a dataset representing a global ocean salinity simulation that showed a 51.4% improvement in read performance over Lustre when using our VisIO system. VisIO, provides powerful high-performance I/O services to visualization applications, allowing for interactive performance with ultra-scale, time-series data.

Mitchell, Christopher J [Los Alamos National Laboratory; Ahrens, James P [Los Alamos National Laboratory; Wang, Jun [UCF

2010-10-15T23:59:59.000Z

160

Vibration analysis by speckle techniques in real time  

Science Journals Connector (OSTI)

Vibration analysis in quasi-real time is studied by recording the time-averaged speckle pattern in a bismuth silicon oxide crystal (Bi12SiO20). When the crystal...

Tiziani, H J; Klenk, J

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Time series association learning  

DOE Patents [OSTI]

An acoustic input is recognized from inferred articulatory movements output by a learned relationship between training acoustic waveforms and articulatory movements. The inferred movements are compared with template patterns prepared from training movements when the relationship was learned to regenerate an acoustic recognition. In a preferred embodiment, the acoustic articulatory relationships are learned by a neural network. Subsequent input acoustic patterns then generate the inferred articulatory movements for use with the templates. Articulatory movement data may be supplemented with characteristic acoustic information, e.g. relative power and high frequency data, to improve template recognition.

Papcun, George J. (Santa Fe, NM)

1995-01-01T23:59:59.000Z

162

GC Analysis of Human Breath with A Series-Coupled Column Ensemble and A Multibed Sorption Trap  

Science Journals Connector (OSTI)

The combination of a tandem column ensemble and an on-line microsorption trap is used for the analysis of organic compounds in human breath samples. The four-bed sorption trap uses a series of discreet sorption beds containing three grades of graphitized ...

Juan M. Sanchez; Richard D. Sacks

2003-04-10T23:59:59.000Z

163

Analysis of Wind Power and Load Data at Multiple Time Scales  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analysis of Wind Power and Load Data at Multiple Time Scales Analysis of Wind Power and Load Data at Multiple Time Scales Title Analysis of Wind Power and Load Data at Multiple Time Scales Publication Type Report LBNL Report Number LBNL-4147E Year of Publication 2010 Authors Coughlin, Katie, and Joseph H. Eto Date Published 12/2010 Publisher LBNL City Berkeley Keywords renewable generation integration Abstract In this study we develop and apply new methods of data analysis for high resolution wind power and system load time series, to improve our understanding of how to characterize highly variable wind power output and the correlations between wind power and load. These methods are applied to wind and load data from the ERCOT region, and wind power output from the PJM and NYISO areas. We use a wavelet transform to apply mathematically well-defined operations of smoothing and differencing to the time series data. This approach produces a set of time series of the changes in wind power and load (or "deltas"), over a range of times scales from a few seconds to approximately one hour. A number of statistical measures of these time series are calculated. We present sample distributions, and devise a method for fitting the empirical distribution shape in the tails. We also evaluate the degree of serial correlation, and linear correlation between wind and load. Our examination of the data shows clearly that the deltas do not follow a Gaussian shape; the distribution is exponential near the center and appears to follow a power law for larger fluctuations. Gaussian distributions are frequently used in modeling studies. These are likely to over-estimate the probability of small to moderate deviations. This in turn may lead to an over-estimation of the additional reserve requirement (hence the cost) for high penetration of wind. The Gaussian assumption provides no meaningful information about the real likelihood of large fluctuations. The possibility of a power law distribution is interesting because it suggests that the distribution shape for of wind power fluctuations may become independent of system size for large enough systems.

164

Capabilities Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Capabilities Series Capabilities Series www.emsl.pnl.gov Scientific Innovation Through Integration WHY USE EMSL'S MOLECULAR SCIENCE COMPUTING CAPABILITY? Ì Molecular Science Computing provides users with an integrated suite of computing hardware and software capabilities optimized for achieving the fastest time-to-solution for complex systems-level environmental molecular science simulations. Ì Expert staff members have extensive knowledge and experience in high-performance computing, as well as the operations, domain expertise, and scientific knowledge to support EMSL's users. Ì Substantial integration of transformational high-end computing simulations with experimental resources at EMSL provides a unique multidisciplinary research environment. The Molecular Science Computing capability at EMSL

165

Quantitative evaluation of time-series GHG emissions by sector and region using consumption-based accounting  

Science Journals Connector (OSTI)

This study estimates global time-series consumption-based GHG emissions by region from 1990 to 2005, including both CO2 and non-CO2 GHG emissions. Estimations are conducted for the whole economy and for two specific sectors: manufacturing and agriculture. Especially in the agricultural sector, it is important to include non-CO2 GHG emissions because these are the major emissions present. In most of the regions examined, the improvements in GHG intensities achieved in the manufacturing sector are larger than those in the agricultural sector. Compared with developing regions, most developed regions have consistently larger per-capita consumption-based GHG emissions over the whole economy, as well as higher production-based emissions. In the manufacturing sector, differences calculated by subtracting production-based emissions from consumption-based GHG emissions are determined by the regional economic level while, in the agricultural sector, they are dependent on regional production structures that are determined by international trade competitiveness. In the manufacturing sector, these differences are consistently and increasingly positive for the U.S., EU15 and Japan but negative for developing regions. In the agricultural sector, the differences calculated for the major agricultural importers like Japan and the EU15 are consistently positive while those of exporters like the U.S., Australia and New Zealand are consistently negative.

Takashi Homma; Keigo Akimoto; Toshimasa Tomoda

2012-01-01T23:59:59.000Z

166

Generation of long time series of burn area maps of the boreal forest from NOAA–AVHRR composite data  

Science Journals Connector (OSTI)

A time series of burned land areas was generated for a 23 year period (1984–2006) using 10-day composites of AVHRR data. The study area covers 1.6 million km2 of boreal forest in western Canada. The algorithm was intended to be consistent throughout the study period and region, and to avoid commission errors, so as to obtain a reliable sample of temporal trends in burned area in the region. The algorithm relies on temporal comparisons of several spectral indices (GEMI, BAI), as well as near infrared reflectance. It emphasizes the stability of the post-fire signal, to avoid false detections associated with cloud, cloud shadows, missed data and radiometric or geometric calibration between AVHRR sensors. Final results show a very consistent temporal adjustment to official statistics and fire perimeters, with very low commission error (< 10%), but medium to high omission error (50%). Burned areas in the region were predominantly associated with coniferous forest cover, with the Taiga and Boreal Shield ecozones, in latitudes between 56 and 60°N, and predominantly at long distances from populated places.

Emilio Chuvieco; Peter Englefield; Alexander P. Trishchenko; Yi Luo

2008-01-01T23:59:59.000Z

167

Lecture Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Resources > Lecture Series Lecture Series The US LHC community has organized two nationwide public lecture series around the themes of the Large Hadron Collider and the Angels &...

168

Microwave Plasma Monitoring System For Real-Time Elemental Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

169

Low energy ion scattering using time-of-flight analysis  

E-Print Network [OSTI]

. Church A low energy ion scattering (LEIS) spectrometer utalizing time-of-flight (TOF) analysis has been constructed and operated in order to describe the com- position of various metal surfaces with adsorbed gases. The LEIS(TOF) spectra oi each target..., ISS) using time-of-flight (TOF) analysis is the method employed in this research to investigate the surface coverage and composition of various metals with adsorbed gases. The target metals used in this research were copper, aluminum, and stainless...

Lyttle, David Scott

2012-06-07T23:59:59.000Z

170

Cost Analysis using Automatic Size and Time Inference  

E-Print Network [OSTI]

Cost Analysis using Automatic Size and Time Inference #19; Alvaro J. Reb#19;on Portillo 1 , Kevinunchen, Institut fur Informatik, D 80538 Munchen, Germany hwloidl@informatik.uni-muenchen.de Abstract Cost that is capable of determining upper bounds for both time and space costs, and which we initially intend to apply

St Andrews, University of

171

Introduction to Ocean Station Time Series CD-ROM The National Oceanographic Data Center (NODC) and the World Data Center for  

E-Print Network [OSTI]

Introduction to Ocean Station Time Series CD-ROM The National Oceanographic Data Center (NODC, density, and nutrients, are now available on one CD-ROM (originally distributed in 1993). CD-ROM Contents a complete record layout of the SD2 format and the code tables used with it. This CD-ROM also holds

172

Time-series analysis of high-resolution ebullition fluxes from a stratified, freshwater lake  

E-Print Network [OSTI]

[1] Freshwater lakes can emit significant quantities of methane to the atmosphere by bubbling. The high spatial and temporal heterogeneity of ebullition, combined with a lack of high-resolution field measurements, has made ...

Varadharajan, Charuleka

173

Analysis on the KOSPI200 option from the time-series and cross- sectional perspectives  

E-Print Network [OSTI]

The Korean derivatives market is one of the most active markets in the world. The KOSPI200 options accounted for 43.4% of the global trading volume in equity index futures and options in 2011. It also accounted for 93.5% ...

Jung, Jaewook

2013-01-01T23:59:59.000Z

174

R.H. Shumway and D.S. Stoffer Time Series Analysis and Its Applications  

E-Print Network [OSTI]

.1) and below: Write wti instead of wit, and write cov(wti, wtj) instead of cov(wit, wjt) for consistency. · p

175

QUANTIFYING ORGANIZATION OF ATMOSPHERIC TURBULENT EDDY MOTION USING NONLINEAR TIME SERIES ANALYSIS  

E-Print Network [OSTI]

the exchange rates of mass and energy between the terrestrial biosphere and atmosphere. Around the world measurements of carbon and energy exchange between the vegetation and the atmosphere (Kaiser, 1998). It has layer (ASL). Within the ASL, the flow statistics are typically one-dimensional and well described

Katul, Gabriel

176

Regression and Time Series Analysis of the World Oil Peak of Production: Another Look  

Science Journals Connector (OSTI)

This paper analyzes world oil production data as a population/resource growth model. Both US and world oil production data are analyzed in terms of ... , is not a suitable model for world oil production. A flexib...

Peter Caithamer

2008-08-01T23:59:59.000Z

177

EXTREME VALUE ANALYSIS FOR CLIMATE TIME SERIES Institute for Mathematics Applied to Geosciences  

E-Print Network [OSTI]

Approach (Extremes + Non-Extremes) (8) Risk Communication under Climate Change #12;4 (1) Background · Use.isse.ucar.edu/staff/katz/ Lecture: ···/staff/katz/docs/pdf/banffrwk.pdf #12;2 Quote "Climate change undermines a basic assumption Cycles (annual, diurnal) Trends (global climate change) Physically-based covariates (e. g., El Niño

Katz, Richard

178

A Novel Approach to the Analysis of Nonlinear Time Series with Applications to Financial Data  

E-Print Network [OSTI]

of Xt = 0:9Xt 1 + Zt : : : : : : : : : : 14 4 The quantile spectral density of Xt = tZt, where 2t = 1=1:9 + 0:9X 2 t 1 14 5 The quantile spectral density of X2t = 2 tZ 2 t , where 2 t = 1=1:9 + 0:9X 2 t 1 15 6 The ne line... : : : : : : : : : : : : : : : : : : : : 33 9 The association spectral density of Xt = 0:6Xt 1 + Zt; (Left) Nonstandardized, (Right) Standardized : : : : : : : : : : : : : : : : : 63 10 The association spectral density of Xt = 0:9Xt 1 + Zt; (Left) Nonstandardized, (Right) Standardized...

Lee, Jun Bum

2012-07-16T23:59:59.000Z

179

Observed baroclinic Energy Conversions in Wavenumbers Domain for Three Winters: A Time Series Analysis  

Science Journals Connector (OSTI)

Daily European Centre for Medium Weather Forecasting (ECMWF) analyses (Reading, GB) for three winters were used to compute the two baroclinic energy transformations C(AgAm) (related to ?mTm? and zonal wavenumber m) and C(AmKm) (related to ?mTm? and m) ...

Heinz-Dieter Schilling

1987-02-01T23:59:59.000Z

180

Forecasting the S&P 500 index using time series analysis and simulation methods  

E-Print Network [OSTI]

The S&P 500 represents a diverse pool of securities in addition to Large Caps. A range of audiences are interested in the S&P 500 forecasts including investors, speculators, economists, government and researchers. The ...

Chan, Eric Glenn

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Quantification and clustering of phenotypic screening data using time-series analysis for chemotherapy of schistosomiasis  

E-Print Network [OSTI]

into a piecewise aggregate approximation (PAA) is performed.In the second step, the PAA is converted into a discretesteps. Each segment in the PAA indicates the average of the

2012-01-01T23:59:59.000Z

182

Anomaly detection in thermal pulse combustors using symbolic time series analysis  

E-Print Network [OSTI]

) produce transitions of combustion process variables unless the embedded statistical characteristics of parametric and non- on the system response (e.g. pressure oscillations). parametric changes in the combustion process may 3. Early detection of changes in the tailpipe friction cause unpredictable anomalies (i

Ray, Asok

183

Utility based Data Mining for Time Series Analysis -Cost-sensitive Learning for Neural Network Predictors  

E-Print Network [OSTI]

asymmetric. For example, in inventory management of retail outlets, keeping units of consumer goods in stock

Weiss, Gary

184

A versatile real-time spectral analysis system  

E-Print Network [OSTI]

. CONCLUSIONS AND RECOMMENDATIONS REFERENCES APPENDIX A. MINDOWING APPENDIX B. CCD TRANSVERSAL FILTERS VITA Page 65 71 73 81 92 93 105 105 106 106 108 112 114 134 170 LIST OF FIGURES Figure 1. Filterbank Technique for Spectral Analysis 2... 1. Filter Bank Technique 2. Sliding Filter Technique 3. Dispersive Filter Technique 4. Discrete Fourier Transform Techniques B. Applications Requiring Spectral Analysis . . 1. Real-Time Radar Scatterometer Data Processing 2. Chirp FN Radar Data...

Hancock, Mark Steven

2012-06-07T23:59:59.000Z

185

Coalbed-methane pilots - timing, design, and analysis  

SciTech Connect (OSTI)

Four distinct sequential phases form a recommended process for coalbed-methane (CBM)-prospect assessment: initial screening reconnaissance, pilot testing, and final appraisal. Stepping through these four phases provides a program of progressively ramping work and cost, while creating a series of discrete decision points at which analysis of results and risks can be assessed. While discussing each of these phases in some degree, this paper focuses on the third, the critically important pilot-testing phase. This paper contains roughly 30 specific recommendations and the fundamental rationale behind each recommendation to help ensure that a CBM pilot will fulfill its primary objectives of (1) demonstrating whether the subject coal reservoir will desorb and produce consequential gas and (2) gathering the data critical to evaluate and risk the prospect at the next-often most critical-decision point.

Roadifer, R.D.; Moore, T.R.

2009-10-15T23:59:59.000Z

186

Cache Timing Analysis of eStream Finalists Erik Zenner  

E-Print Network [OSTI]

is is good for? Loading data from cache is much faster than loading data from RAM (e.g. RAM access 50 cycles: Check whether requested data is at cache address (a mod n). If not, load data into cache address (a mod n). Load data item directly from cache. Erik Zenner (DTU-MAT) Cache Timing Analysis e

Zenner, Erik

187

Theoretical and Numerical Analysis of Polarization for Time Dependent Radiative  

E-Print Network [OSTI]

transport equation with respect to the polariza- tion parameters solve the matrix-valued radiative transferTheoretical and Numerical Analysis of Polarization for Time Dependent Radiative Transfer Equations@math.stanford.edu Abstract We consider the matrix-valued radiative transfer equations for the Stokes param- eters

Bal, Guillaume

188

Time-domain Dynamics and Stability Analysis of Optoelectronic Oscillators  

E-Print Network [OSTI]

Time-domain Dynamics and Stability Analysis of Optoelectronic Oscillators based on Whispering and Yanne K. Chembo Optoelectronic oscillators (OEOs) are microwave photonics systems in- tended to generate in "" #12;1 Introduction The optoelectronic oscillator (OEO) is nowadays considered as one of the most

Paris-Sud XI, Université de

189

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network [OSTI]

Analysis of Wind Power and Load Data at Multiple Time ScalesAnalysis of Wind Power and Load Data at Multiple Time ScalesAnalysis of Wind Power and Load Data at Multiple Time Scales

Coughlin, Katie

2011-01-01T23:59:59.000Z

190

Time-average TV holography for vibration fringe analysis  

SciTech Connect (OSTI)

Time-average TV holography is widely used method for vibration measurement. The method generates speckle correlation time-averaged J0 fringes that can be used for full-field qualitative visualization of mode shapes at resonant frequencies of an object under harmonic excitation. In order to map the amplitudes of vibration, quantitative evaluation of the time-averaged fringe pattern is desired. A quantitative evaluation procedure based on the phase-shifting technique used in two beam interferometry has also been adopted for this application with some modification. The existing procedure requires a large number of frames to be recorded for implementation. We propose a procedure that will reduce the number of frames required for the analysis. The TV holographic system used and the experimental results obtained with it on an edge-clamped, sinusoidally excited square aluminium plate sample are discussed.

Kumar, Upputuri Paul; Kalyani, Yanam; Mohan, Nandigana Krishna; Kothiyal, Mahendra Prasad

2009-06-01T23:59:59.000Z

191

A case study of an expert mathematics teacher's interactive decision-making system using physiological and behavioral time series data  

E-Print Network [OSTI]

The purpose of this exploratory case study was to describe an expert teacher?s decision-making system during interactive instruction using teacher self-report information, classroom observation data, and physiological recordings. Timed recordings...

Jensen, Deborah Larkey

2005-02-17T23:59:59.000Z

192

Finite-time thermodynamic analysis of the Stirling engine  

SciTech Connect (OSTI)

This paper presents a finite-time thermodynamic analysis of the Stirling engine cycle. A lumped-parameter thermodynamic model is used to describe the dynamic behavior of the Stirling engine. The mathematical formulation of this model is based on mass and energy balances with associated heat transfer rate equations. These governing equations are formulated into a set of ordinary differential equations, which are then solved numerically to obtain the dynamic behavior of the Stirling engine. Close inspection of the governing equations reveals that the time to complete on cycle, {tau} and the engine time constant, {tau}{sub c} always appear together in a dimensionless ratio. This ratio, {tau}/{tau}{sub c}, is defined here as the Finite-Time Parameter, FTP. The effects of FTP upon power output and efficiency, are studied. The results show that there exists an optimum power output for a given engine design, based on engine speed and heat-transfer contact time. The results also provide an engineering evaluation procedure to improve the efficiency and power output of Stirling engines.

Ibrahim, O.M. [Univ. of Rhode Island, Kingston, RI (United States). Mechanical Engineering Dept.; Ladas, H.G. [Environmental Engineering Corp., North Kingstown, RI (United States)

1995-12-31T23:59:59.000Z

193

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network [OSTI]

2007. Analysis of Wind Power and Load Data at Multiple Timesd- Analysis of Wind Power and Load Data at Multiple Time35   v Analysis of Wind Power and Load Data at Multiple Time

Coughlin, Katie

2011-01-01T23:59:59.000Z

194

Modular Sampling and Analysis Techniques for the Real-Time Analysis of Human Breath  

SciTech Connect (OSTI)

At LLNL and UC Davis, we are developing several techniques for the real-time sampling and analysis of trace gases, aerosols and exhaled breath that could be useful for a modular, integrated system for breath analysis. Those techniques include single-particle bioaerosol mass spectrometry (BAMS) for the analysis of exhaled aerosol particles or droplets as well as breath samplers integrated with gas chromatography mass spectrometry (GC-MS) or MEMS-based differential mobility spectrometry (DMS). We describe these techniques and present recent data obtained from human breath or breath condensate, in particular, addressing the question of how environmental exposure influences the composition of breath.

Frank, M; Farquar, G; Adams, K; Bogan, M; Martin, A; Benner, H; Spadaccini, C; Steele, P; Davis, C; Loyola, B; Morgan, J; Sankaran, S

2007-07-09T23:59:59.000Z

195

Are fluctuations in natural gas consumption per capita transitory? Evidence from time series and panel unit root tests  

Science Journals Connector (OSTI)

Abstract The stationary properties of natural gas consumption are essential for predicting the impacts of exogenous shocks on energy demand, which can help modeling the energy-growth nexus. Then, this paper proposes to investigate the panel unit root proprieties of natural gas energy consumption of 48 countries over the period of 1971–2010. We apply the Harvey et al. [69] linearity test in order to determine the type of the unit root tests (the Kruse (2010) nonlinear unit root or LM (Lagrange Multiplier) linear unit root tests). Our results show that the stationarity of natural gas consumption cannot be rejected for more than 60% of countries. In order to provide corroborating evidence, we employed not only the first and second generation panel unit root tests, but also the recent LM panel unit root test developed by Im et al. [28]. This test allows for structural breaks both in intercept and slope. The empirical findings support evidence in favor of stationarity of natural gas consumption for all panels. These results announce that any shock to natural gas consumption has a transitory impact for almost all countries implying that energy consumption will turn back to its time trend.

Muhammad Shahbaz; Naceur Khraief; Mantu Kumar Mahalik; Khair Uz Zaman

2014-01-01T23:59:59.000Z

196

in HENDERSON Carol & WEISGRAU Maxine (eds.), Raj Rhapsodies: Tourism, Heritage, and the Seduction of History, Hampshire: Ashgate. Series New Directions in Tourism Analysis.  

E-Print Network [OSTI]

in HENDERSON Carol & WEISGRAU Maxine (eds.), Raj Rhapsodies: Tourism, Heritage, and the Seduction of History, Hampshire: Ashgate. Series New Directions in Tourism Analysis. Election and exclusion in the Udaipur Urban Space: implications on tourism Nicolas Bautès UMR ESO 6590 ­ ESO CAEN Introduction

Boyer, Edmond

197

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

SciTech Connect (OSTI)

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

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

2006-11-01T23:59:59.000Z

198

Engineering evaluation/cost analysis for the proposed management of 15 nonprocess buildings (15 series) at the Weldon Spring Site Chemical Plant, Weldon Spring, Missouri  

SciTech Connect (OSTI)

The US Department of Energy, under its Surplus Facilities Management Program (SFMP), is responsible for cleanup activities at the Weldon-Spring site, located near Weldon Spring, Missouri. The site consists of two noncontiguous areas: (1) a raffinate pits and chemical plant area and (2) a quarry. This engineering evaluation/cost analysis (EE/CA) report has been prepared to support a proposed removal action to manage 15 nonprocess buildings, identified as the 15 Series buildings, at the chemical plant on the Weldon Spring site. These buildings have been nonoperational for more than 20 years, and the deterioration that has occurred during this time has resulted in a potential threat to site workers, the general public, and the environment. The EE/CA documentation of this proposed action is consistent with guidance from the US Environmental Protection Agency (EPA) that addresses removal actions at sites subject to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended by the Superfund Amendments and Reauthorization Act of 1986. Actions at the Weldon Spring site are subject to CERCLA requirements because the site is on the EPA`s National Priorities List. The objectives of this report are to (1) identify alternatives for management of the nonprocess buildings; (2) document the selection of response activities that will mitigate the potential threat to workers, the public, and the environment associated with these buildings; and (3) address environmental impacts associated with the proposed action.

MacDonell, M M; Peterson, J M

1989-05-01T23:59:59.000Z

199

Nonparametric estimation in ?-series processes  

Science Journals Connector (OSTI)

A counting process {N(t),t>=0} with the interoccurrence times X"1,X"2,... is an @a-series process if there exists a real number @a such that (k^@aX"k)"k"="1","2","... forms a renewal process. The nonparametric inference problem in an @a-series process ... Keywords: ?-series process, Linear regression, Trend

Halil Aydo?Du; Mahmut Kara

2012-01-01T23:59:59.000Z

200

Comparing series of rankings with ties by using complex networks: An analysis of the spanish stock market (IBEX-35 index)  

E-Print Network [OSTI]

In this paper we extend the concept of Competitivity Graph to compare series of rankings with ties ({\\em partial rankings}). We extend the usual method used to compute Kendall's coefficient for two partial rankings to the concept of evolutive Kendall's coefficient for a series of partial rankings. The theoretical framework consists of a four-layer multiplex network. Regarding the treatment of ties, our approach allows to define a tie between two values when they are close {\\em enough}, depending on a threshold. We show an application using data from the Spanish Stock Market; we analyse the series of rankings defined by $25$ companies that have contributed to the IBEX-35 return and volatility values over the period 2003 to 2013.

Pedroche, F; Garcia, E; Romance, M; Sanchez, V E

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

A Cache Timing Analysis of HC-256 Erik Zenner  

E-Print Network [OSTI]

, load data into cache address (a mod n). Load data item directly from cache. Next time data from Timing Attacks Cache Workings (Simplified) Working principle: Let n be the cache size. When data from RAM address a is requested by the CPU: Check whether requested data is at cache address (a mod n). If not

Zenner, Erik

202

Time average vibration fringe analysis using Hilbert transformation  

SciTech Connect (OSTI)

Quantitative phase information from a single interferogram can be obtained using the Hilbert transform (HT). We have applied the HT method for quantitative evaluation of Bessel fringes obtained in time average TV holography. The method requires only one fringe pattern for the extraction of vibration amplitude and reduces the complexity in quantifying the data experienced in the time average reference bias modulation method, which uses multiple fringe frames. The technique is demonstrated for the measurement of out-of-plane vibration amplitude on a small scale specimen using a time average microscopic TV holography system.

Kumar, Upputuri Paul; Mohan, Nandigana Krishna; Kothiyal, Mahendra Prasad

2010-10-20T23:59:59.000Z

203

Abarbanel, H., Brown, R., & Kadtke, J., 1989. Prediction and System Iden tification in Chaotic Time Series with Broadband Fourier Spectra. Phys.  

E-Print Network [OSTI]

Preprint Series LSE­MPS­67, Dept. of Mathematics, London School of Economics, Houghton St., London WC2A 2AE experiments on identification of transmembrane domains. In Proceedings of the 25th Hawaii International

Schuurmans, Dale

204

Distributed Architecture for Real-time Traffic Analysis Cristian Morariu, Burkhard Stiller  

E-Print Network [OSTI]

Distributed Architecture for Real-time Traffic Analysis Cristian Morariu, Burkhard Stiller Department of Informatics, University of Zürich CH-8050, Zürich, Switzerland {morariu, stiller

Boyer, Edmond

205

A computational analysis of the evaporator/artery of an alkali metal thermal to electric conversion (AMTEC) PX series cell  

E-Print Network [OSTI]

, while minimizing mass. Current technology, such as Radioisotope Thermoelectric Generators (RTG's) are reliable, but do not supply the power conversion efficiencies desired for future space missions. That leads to Alkali Metal Thermal to Electric...-series cells to generate electricity for the deep space vehicle. The higher efficiency of AMTEC compared to other conversion technologies, such as Radioisotope Thermoelectric Generators (RTG's), results in less energy source material being launched...

Pyrtle, Frank

1999-01-01T23:59:59.000Z

206

Model for LMFBR core transient analysis in real-time  

SciTech Connect (OSTI)

This paper discusses the modeling of LMFBR core transients. It is shown that with a proper choice of shape functions a nodal approximation of the coolant, cladding, and fuel temperature distributions leads to adequately accurate power and temperature predictions, as well as adequately short computation times.

Tzanos, C.P.

1986-01-01T23:59:59.000Z

207

Reservoir analysis using production decline data and adjusted time  

E-Print Network [OSTI]

at constant pressure (after Fetkovich). . . . . . . . . . . . . . . . . . . 43 24 Composite dimensionless cumulative type curve for a well centered in a circular drainage area, producing at constant pressure (after Fraim). . . . . . . . . . 46 25 26..., semi-log analysis becomes more complicated for hyperbolic decline. Also, transient data are of little value in production forecasting. Fetkovich developed a type curve which combined the'transient, and boundary- dominated rate solutions...

McCray, Thomas Lee

1990-01-01T23:59:59.000Z

208

Model for LMFBR core transient analysis in real time  

SciTech Connect (OSTI)

Plant safety as well as plant availability can be significantly improved if functions such as data validation, plant state verification, and fault identification are automated. A methodology for automation of these functions was presented in an earlier paper. To implement this methodology, plant models that run significantly faster than real transient time are needed. Such models for the intermediate heat exchanger and a once-through liquid-metal fast breeder reactor (LMFBR) steam generator have been presented. This paper discusses the modeling of LMFBR core transients. It is shown that, with a proper choice of shape functions, a nodal approximation of the coolant, cladding, and fuel temperature distributions leads to adequately accurate power and temperature predictions, as well as adequately short computation times. From the point of view of operational safety, it is desirable to terminate a transient before sodium boiling is initiated in the core. Thus, only the modeling of the preboiling phase of core transients is discussed.

Tzanos, C.P.

1986-01-01T23:59:59.000Z

209

Hierarchical Bivariate Time Series Models: A Combined Analysis of the Effects of Particulate Matter on Morbidity and  

E-Print Network [OSTI]

manufacturers. Funding for Francesca Dominici was provided by a grant from the Health Effects Institute (Walter Effects Institute (HEI), an organization jointly funded by the Environmental Protection Agency (EPA R@jhsph.edu. Acknowledgments: Research described in this article was partially supported by a contract and grant from Health

Dominici, Francesca

210

THE DRIVING FORCE BEHIND GUN CRIMES: A TIME SERIES ANALYSIS OF THE IMPACT OF GUN TYPE AND GUN DENSITY.  

E-Print Network [OSTI]

??Very few studies have explored the relationship between the availability of certain types of firearms and gun density on both gun aggravated assaults and gun… (more)

Graham II, Matthew

2007-01-01T23:59:59.000Z

211

Simulation analysis of moored fluorometer time series from the Mid-Atlantic Bight during 1987--1990  

SciTech Connect (OSTI)

The goal of the previous research during 1987-1990 within the DOE (Department of Energy) Shelf Edge Exchange Processes (SEEP) program in the Mid-Atlantic Bight was to understand the physical and biogeochemical processes effecting the diffusive exchange of the proxies of energy-related, by-products associated with particulate matter between estuarine, shelf, and slope waters on this continental margin. As originally envisioned in the SEEP program plan, SEEP-III would take place at Cape Hatteras to study the advective exchange of materials by a major boundary current. One problem of continuing interest is the determination of the local assimilative capacity of slope waters and sediments off the eastern seaboard of the US to lengthen the pathway between potentially harmful energy by-products and man. At basin scales, realistic specification of the lateral transport by western boundary currents of particulate matter is a necessary input to global models of carbon/nitrogen cycling. Finally, at these global scales, the generic role of continental margins in cycling greenhouse gases, e.g. CO{sub 2}, CH{sub 4}, and N{sub 2}O, is now of equal interest. This continuing research of model construction and evaluation within the SEEP program focuses on all three questions at local, regional, and basin scales. Results from SEEP-I and II are discussed as well as plans for SEEP-III. 14 figs., 3 tabs.

Walsh, J.J.

1990-01-01T23:59:59.000Z

212

Neon time-of-flight backscattering spectrometry for surface analysis  

E-Print Network [OSTI]

of the output pulse initial rise, a beam pulse is sent towards the target. Scattered ions from this beam pulse that make their way to the detector cause a signal to be sent through the constant fraction discriminator (CFD) to the time-to-amplitude converter... are thermionic and electric field emissions from the walls of the channels in the MCPs, residual gas ionization, discharge due to the high electric fields and photoelectrons from the MCP support materials [11]. The size of the electron avalanches generated...

Garcia, Richard Michael

2001-01-01T23:59:59.000Z

213

Series A.  

Office of Legacy Management (LM)

.WGJPH-146 ' .WGJPH-146 ' 3 .P' , p3 ."J$i v-e- \. Cont&ning 3 pages Consisting of 0 figuree. Copy No. &of-G copies Series A. , / October 19, 1943 I:. ;I, ' , r;l ?" I ' I' 0 : J. Chipman r'rcro: John P. Howe In Re: Trip to ClYveland, Ohio, October 11, I.943 Thie is to report on the conference held on October 11th in which the pro+. 'g'.*rSs of the coating pork at the Cirasselli Labara*torios ores reviewed. lh05e pToSs;lt were: A. S. I?;ey,uendt; J, C. !'ioodhouse; M. T. Goebel; L. R. kstbrook; .4. Ii. Gray; J. P. Howe; Z. Ft. Keller. YI.,XTFXIP~UTIN~ - A, G. Grcv --- Gray summar ized the progress j;n ,elactropkti:~y, much as is givan ic Yr:e : &.$. .:r : -3 reports of the !l'whnicriL Division. ,. .I c.. , lhe.main points were: ~~'orit i< f:c~!--

214

Catching fish in the stream: real time analysis of audience behavior in social media  

Science Journals Connector (OSTI)

In this interactive poster, we describe a system we designed for identifying and tracking the behavior of distinct audiences in social media streams. Keywords: audience behavior, real-time analysis, social media

Yu-Ru Lin; Drew Margolin; Brian Keegan; Mauro Martino; Sasha Goodman; David Lazer

2013-02-01T23:59:59.000Z

215

Vibration analysis of plates by a time-averaged projection-moiré method  

Science Journals Connector (OSTI)

A time-averaged moiré principle is described that is appropriate for vibration analysis of plates. If the projected grating, deformed by the vibrating object, is superposed upon a...

Ritter, Reinhold; Meyer, Hans-Juergen

1980-01-01T23:59:59.000Z

216

Directional Stability Analysis of a Ship Allowing for Time History Effects of the Flow  

Science Journals Connector (OSTI)

...research-article Directional Stability Analysis of a Ship Allowing for Time History Effects of the Flow R. E. D. Bishop R. K. Burcher W...determine the directional stability and control of a ship. A method of analysis is presented which indicates...

1973-01-01T23:59:59.000Z

217

Time lapse seismic signal analysis for Cranfield, MS, EOR and CCS site Ditkof, J.1  

E-Print Network [OSTI]

EG31 Time lapse seismic signal analysis for Cranfield, MS, EOR and CCS site Ditkof, J.1 , Caspari Australia The Cranfield field located in Southwest Mississippi is an EOR and CCS project which has been-delay along a horizon below the reservoir. Keywords: time lapse, 4D seismic, CO2 sequestration, EOR, seismic

Texas at Austin, University of

218

An analysis of P times reported in the Reviewed Event Bulletin for Chinese underground explosions  

Science Journals Connector (OSTI)

......disturbance to determine if a nuclear test really took place. The Treaty states...for P times from explosions at the Nevada Test Site observed out to distances of 20...An analysis of P travel times for Nevada Test Site explosions recorded at regional......

A. Douglas; A. M. O'Mongain; D. Porter; J. B. Young

2005-11-01T23:59:59.000Z

219

Analysis of Heart Rate Variability Using Time-Varying Filtering of Heart Transplanted Patients  

E-Print Network [OSTI]

Analysis of Heart Rate Variability Using Time-Varying Filtering of Heart Transplanted Patients the heart rate variability (HRV), obtained by using the time-varying integral pulse frequency modulation (TVIPFM) which is well adapted to the exercise stress testing. We consider that the mean heart period

Paris-Sud XI, Université de

220

Microfluidic single cell real-time PCR for comparative analysis of gene expression patterns  

E-Print Network [OSTI]

Microfluidic single cell real-time PCR for comparative analysis of gene expression patterns collection. We present here a high-content microfluidic real-time platform as a powerful tool expression; dynamic assay; microfluidic; pluripotent INTRODUCTION Novel genomic technologies have paved

Quake, Stephen R.

Note: This page contains sample records for the topic "time series analysis" 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

Cognitive tasks in information analysis: Use of event dwell time to characterize component activities  

SciTech Connect (OSTI)

Technology-based enhancement of information analysis requires a detailed understanding of the cognitive tasks involved in the process. The information search and report production tasks of the information analysis process were investigated through evaluation of time-stamped workstation data gathered with custom software. Model tasks simulated the search and production activities, and a sample of actual analyst data were also evaluated. Task event durations were calculated on the basis of millisecond-level time stamps, and distributions were plotted for analysis. The data indicate that task event time shows a cyclic pattern of variation, with shorter event durations (< 2 sec) reflecting information search and filtering, and longer event durations (> 10 sec) reflecting information evaluation. Application of cognitive principles to the interpretation of task event time data provides a basis for developing “cognitive signatures” of complex activities, and can facilitate the development of technology aids for information intensive tasks.

Sanquist, Thomas F.; Greitzer, Frank L.; Slavich, Antoinette L.; Littlefield, Rik J.; Littlefield, Janis S.; Cowley, Paula J.

2004-09-28T23:59:59.000Z

222

Analysis of Customer Enrollment Patterns in TIme-Based Rate Programs:  

Broader source: Energy.gov (indexed) [DOE]

Analysis of Customer Enrollment Patterns in TIme-Based Rate Analysis of Customer Enrollment Patterns in TIme-Based Rate Programs: Initial Results from the SGIG Consumer Behavior Studies (July 2013) Analysis of Customer Enrollment Patterns in TIme-Based Rate Programs: Initial Results from the SGIG Consumer Behavior Studies (July 2013) The U.S. Department of Energy is implementing the Smart Grid Investment Grant (SGIG) program under the American Recovery and Reinvestment Act of 2009 (Recovery Act). The SGIG program involves 99 projects that are deploying smart grid technologies, tools, and techniques for electric transmission, distribution, advanced metering, and customer systems. A subset of the 99 SGIG projects is conducting consumer behavior studies. These studies examine the response of residential and small commercial

223

Development and assessment of a 250 m spatial resolution MODIS annual land cover time series (2000–2011) for the forest region of Canada derived from change-based updating  

Science Journals Connector (OSTI)

Abstract Detailed information on the spatial and temporal distribution of land cover is required to evaluate the effects of land cover change on environmental processes. The development of temporally consistent land cover time series (LCTS) from satellite-based earth observation has proven difficult because multi-year observations are acquired under different conditions resulting in high inter-annual reflectance variability. This leads to spurious differences in land cover when standard approaches for image classification are applied to generate multi-year land cover data. To reduce this effect, a common solution has been to first detect change and update a base map for only these change areas. As long as the change commission error is low, this approach will ensure high consistency between maps in the time series. Here we present an approach for change-based LCTS development following from previous research, but with significant advancements in change detection, training, classification, and evidence-based refinement. The method was applied to generate an annual LCTS covering Canada spanning 2000–2011 that is consistent between years and can be used to identify dominant change transitions. Assessment of the LCTS was challenging because multiple maps needed to be evaluated and can be prohibitive particularly for annual time series covering several years. Three approaches were undertaken involving visual examination, comparison with a reference sample derived from Landsat, and comparison with the MODIS Global LCTS V5.1. Visual assessment revealed high inter-map consistency and logical temporal change trajectories of land cover classes. Comparison with the reference sample showed an accuracy of 70% at the 19 class thematic resolution. Accounting for mixed pixels by considering the first or second reference land cover label as correct increased the accuracy to 80%. Comparison with the MODIS Global LCTS showed that the Canada LCTS achieved higher inter-map consistency and accuracy as expected with national relative to global land cover products.

Darren Pouliot; Rasim Latifovic; Natalie Zabcic; Luc Guindon; Ian Olthof

2014-01-01T23:59:59.000Z

224

Universal Strak Camera C10910 Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

time periods. In addition to superb temporal resolution, the streak camera can capture spatial (or spectral) data simultaneously. The C10910 series is a universal streak camera...

225

Is WTI crude oil market becoming weakly efficient over time?: New evidence from multiscale analysis based on detrended fluctuation analysis  

Science Journals Connector (OSTI)

This paper extends the work in Tabak and Cajueiro [Are the crude oil markets becoming weakly efficient over time, Energy Economics 29 (2007) 28–36] and Alvarez-Ramirez et al. [Short-term predictability of crude oil markets: a detrended fluctuation analysis approach, Energy Economics 30 (2008) 2645–2656]. In this paper, we test for the efficiency of WTI crude oil market through observing the dynamic of local Hurst exponents employing the method of rolling window based on multiscale detrended fluctuation analysis. Empirical results show that short-term, medium-term and long-term behaviors were generally turning into efficient behavior over time. However, in this way, the results also show that the market did not evolve along stable conditions for long times. Multiscale analysis is also implemented based on multifractal detrended fluctuation analysis. We found that the small fluctuations of WTI crude oil market were persistent; however, the large fluctuations had high instability, both in the short- and long-terms. Our discussion is also extended by incorporating arguments from the crude oil market structure for explaining the different correlation dynamics.

Yudong Wang; Li Liu

2010-01-01T23:59:59.000Z

226

Analysis of environmental influences in nuclear half-life measurements exhibiting time-dependent decay rates  

E-Print Network [OSTI]

In a recent series of papers evidence has been presented for correlations between solar activity and nuclear decay rates. This includes an apparent correlation between Earth-Sun distance and data taken at Brookhaven National Laboratory (BNL), and at the Physikalisch-Technische Bundesanstalt (PTB). Although these correlations could arise from a direct interaction between the decaying nuclei and some particles or fields emanating from the Sun, they could also represent an "environmental" effect arising from a seasonal variation of the sensitivities of the BNL and PTB detectors due to changes in temperature, relative humidity, background radiation, etc. In this paper, we present a detailed analysis of the responses of the detectors actually used in the BNL and PTB experiments, and show that sensitivities to seasonal variations in the respective detectors are likely too small to produce the observed fluctuations.

Jenkins, Jere H; Fischbach, Ephraim

2009-01-01T23:59:59.000Z

227

Volatile emission by contest losers revealed by real-time chemical analysis  

Science Journals Connector (OSTI)

...losers revealed by real-time chemical analysis Marlene Goubault Tim...interactions often involve chemical exchange but simultaneous evaluation...individuals. We explore the chemical behaviour of the bethylid wasp...APCI source was mounted on a Platform II mass spectrometer (Waters...

2006-01-01T23:59:59.000Z

228

Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with  

E-Print Network [OSTI]

Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with Emphasis of offshore wind turbines Defense: 09.12.2012 2012 - : Structural Engineer in Det Norske Veritas (DNV) 2007 of the drive train of an on-land wind turbine under dynamic wind loads. The main tasks of this study are to

Nørvåg, Kjetil

229

-transform MATLAB Laboratory Experiment Purpose: This experiment presents the frequency domain analysis of discrete-time  

E-Print Network [OSTI]

5.6 -transform MATLAB Laboratory Experiment Purpose: This experiment presents the frequency domain analysis of discrete-time systems using MATLAB. The impulse, step, sinusoidal, and exponential on the ¡ -transform. In addition, MATLAB will be used to perform the partial fraction expansion and to find

Gajic, Zoran

230

Signal Probability Based Statistical Timing Analysis University of California, San Diego  

E-Print Network [OSTI]

Signal Probability Based Statistical Timing Analysis Bao Liu University of California, San Diego propose sig- nal probability (i.e., the logic one occurrence probability on a net) based statistical estimation tech- niques are categorized as (1) static, (2) statistical, and (3) simulation and testing based

Liu, Bao

231

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS AND SIMULATION  

E-Print Network [OSTI]

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS by simulation. 1. INTRODUCTION The variety and the wide spread use of power electronic devices in the power networks is due to their diverse and multiple functions: compensation, protection and interface

Boyer, Edmond

232

Arterial Travel Time Estimation Based On Vehicle Re-Identification Using Magnetic Sensors: Performance Analysis  

E-Print Network [OSTI]

: the arterial travel time estimation system is summarized in Section II. The test site and vehicle detection are explained in Section IV. An analysis of the ground truth and the vehicle detection system data is presented City (Figure 1). The performance of the original system and the system with the modified vehicle re

Horowitz, Roberto

233

Residence Time Distribution Measurement and Analysis of Pilot-Scale Pretreatment Reactors for Biofuels Production: Preprint  

SciTech Connect (OSTI)

Measurement and analysis of residence time distribution (RTD) data is the focus of this study where data collection methods were developed specifically for the pretreatment reactor environment. Augmented physical sampling and automated online detection methods were developed and applied. Both the measurement techniques themselves and the produced RTD data are presented and discussed.

Sievers, D.; Kuhn, E.; Tucker, M.; Stickel, J.; Wolfrum, E.

2013-06-01T23:59:59.000Z

234

Real-time difference imaging analysis of MOA Galactic bulge observations during 2000  

Science Journals Connector (OSTI)

......are as follows. Figure 2. Road map of the on-line data analysis...layer of automation. This design provides considerable flexibility...characteristic Einstein radius crossing time-scale and t max is the...rather than a linear reduction pipeline. A variety of levels of automation......

I.A. Bond; F. Abe; R.J. Dodd; J.B. Hearnshaw; M. Honda; J. Jugaku; P.M. Kilmartin; A. Marles; K. Masuda; Y. Matsubara; Y. Muraki; T. Nakamura; G. Nankivell; S. Noda; C. Noguchi; K. Ohnishi; N.J. Rattenbury; M. Reid; To. Saito; H. Sato; M. Sekiguchi; J. Skuljan; D.J. Sullivan; T. Sumi; M. Takeuti; Y. Watase; S. Wilkinson; R. Yamada; T. Yanagisawa; P.C.M. Yock

2001-11-01T23:59:59.000Z

235

Simulator Generation Using an Automaton Based Pipeline Model for Timing Analysis  

E-Print Network [OSTI]

Simulator Generation Using an Automaton Based Pipeline Model for Timing Analysis Rola Kassem, Mika the description of the pipeline. The description is transformed into an automaton and a set of resources which. The blocks communicate and synchronise with each other in order to handle the pipeline hazards. A pipeline

Paris-Sud XI, Université de

236

Outage Detection via Real-time Social Stream Analysis: Leveraging the Power of Online Complaints  

E-Print Network [OSTI]

disruptions. Each is described below with their ac- companying defects. Internal monitoring systems. NetflixOutage Detection via Real-time Social Stream Analysis: Leveraging the Power of Online Complaints documents the design and development of an outage detection system for the online services provided

Dekhtyar, Alexander

237

Comparison of neutron probe and time domain reflectometry techniques of soil moisture analysis  

SciTech Connect (OSTI)

The Environmental Science Group of Los Alamos National Laboratory collected soil water content data using Time Domain Reflectometry (TDR) and neutron probe in order to correlate the results from the two techniques in a study performed at Los Alamos, NM. Two well-characterized field plots (3m {times} 10m) were instrumented with TDR waveguides and neutron probe access tubes at four locations. At each location, TDR rod pairs were placed horizontally at 5-,15-,30-,45- and 60-cm depths and vertical sets of rod pairs with lengths of 15-,30-,45- and 60-cm were installed. Neutron probe measurements were taken at 15-,30-,45- and 60-cm depths. Because the neutron probe measures a spherical volume, soil water content values were compared with horizontal TDR readings averaged over the same zone. Additionally, vertical TDR readings were compared to neutron probe readings averaged over the depths corresponding to each TDR length. Measurements for each technique were taken weekly since Fall of 1992. A time series comparison of the results is presented.

Schofield, T.G.; Langhorst, G.J.; Trujillo, G.; Bostick, K.V.; Hansen, W.R.

1994-04-01T23:59:59.000Z

238

Power Series Introduction  

E-Print Network [OSTI]

Power Series 16.4 Introduction In this section we consider power series. These are examples of infinite series where each term contains a variable, x, raised to a positive integer power. We use the ratio test to obtain the radius of convergence R, of the power series and state the important result

Vickers, James

239

The VLSI design of the minimal dimension, cost and power consumption system for time-frequency signal analysis  

Science Journals Connector (OSTI)

Multiple clock cycle implementation (MCI) of a flexible system for time-frequency (TF) signal analysis is presented. Some very important and frequently used time-frequency distributions (TFDs) can be realized by using the proposed architecture: the spectrogram ... Keywords: FPGA devices, S-method, hardware realization, multiple clock cycle implementation, time-frequency analysis

Veselin N. Ivanovi?; Radovan Stojanovi?

2005-08-01T23:59:59.000Z

240

Burned area mapping time series in Canada (1984–1999) from NOAA-AVHRR LTDR: A comparison with other remote sensing products and fire perimeters  

Science Journals Connector (OSTI)

A new algorithm for mapping burned areas in boreal forest using AVHRR archival data Long Term Data Record (LTDR) (0.05°, ca. 5 km, version 3) was developed in Canada using burn records for the period between 1984 and 1999 and evaluated against AVHRR 1 km and AVHRR-PAL 8 km burned area map products. The algorithm combined 1) absolute and relative radiometric thresholds, 2) a Bayesian network classifier, and 3) neighborhood analysis for spatial fire coherence. Fire event records from Canadian Forest Service National Fire Database (CFSNFD) for western Canada were used to train the algorithm. LTDR and AVHRR 1 km burned area mapping were similar for the same area, and correlated well to CFSNFD annual fire event records for western Canada, r2 = 0.72 and 0.77, respectively. In addition, the LTDR mapping correlated well with fires for all of Canada in the CFSNFD database (r2 = 0.65). This mapping product was a significant improvement over an 8 km AVHRR-PAL burned area map product. For mapping boreal forests burned areas globally, this study demonstrates the potential accuracy for where LTDR represents the highest spatial and temporal resolution of daily images available since the 1980s.

Jose A. Moreno Ruiz; David Riaño; Manuel Arbelo; Nancy H.F. French; Susan L. Ustin; Michael L. Whiting

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Hull/mooring/riser coupled dynamic analysis of a floating platform in time domain  

E-Print Network [OSTI]

this program is about ten times faster than its sibling based on the same FEM theory given by D. L. Garrett in 19g2. The Present Case Study In order to examine the benefits of non-linear coupled dynamic analysis of floating offshore structures with flexible... dynamic analysis, a finite-element-method (FEM) program WINPOST was used (e. g. Kim, 1997; Ran and Kim, 1997). The mooring dynamics program was based on a global-coordinate- based FEM (Garrett, 1982), which is expected to be more efficient than...

Zheng, Weizhong

2000-01-01T23:59:59.000Z

242

Shock timing measurements and analysis in deuterium-tritium-ice layered capsule implosions on NIF  

SciTech Connect (OSTI)

Recent advances in shock timing experiments and analysis techniques now enable shock measurements to be performed in cryogenic deuterium-tritium (DT) ice layered capsule implosions on the National Ignition Facility (NIF). Previous measurements of shock timing in inertial confinement fusion implosions [Boehly et al., Phys. Rev. Lett. 106, 195005 (2011); Robey et al., Phys. Rev. Lett. 108, 215004 (2012)] were performed in surrogate targets, where the solid DT ice shell and central DT gas were replaced with a continuous liquid deuterium (D2) fill. These previous experiments pose two surrogacy issues: a material surrogacy due to the difference of species (D2 vs. DT) and densities of the materials used and a geometric surrogacy due to presence of an additional interface (ice/gas) previously absent in the liquid-filled targets. This report presents experimental data and a new analysis method for validating the assumptions underlying this surrogate technique. Comparison of the data with simulation shows good agreement for the timing of the first three shocks, but reveals a considerable discrepancy in the timing of the 4th shock in DT ice layered implosions. Electron preheat is examined as a potential cause of the observed discrepancy in the 4th shock timing.

Robey, H. F.; Celliers, P. M.; Moody, J. D.; Sater, J.; Parham, T.; Kozioziemski, B.; Dylla-Spears, R.; Ross, J. S.; LePape, S.; Ralph, J. E.; Dewald, E. L.; Berzak Hopkins, L.; Kroll, J. J.; Yoxall, B. E.; Hamza, A. V.; Landen, O. L.; Edwards, M. J. [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)] [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States); Hohenberger, M.; Boehly, T. R. [Laboratory for Laser Energetics, Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, Rochester, New York 14623 (United States); Nikroo, A. [General Atomics, San Diego, California 92196 (United States)] [General Atomics, San Diego, California 92196 (United States)

2014-02-15T23:59:59.000Z

243

Time-cost analysis of a quantum key distribution system clocked at 100 MHz  

E-Print Network [OSTI]

We describe the realization of a quantum key distribution (QKD) system clocked at 100 MHz. The system includes classical postprocessing implemented via software, and is operated over a 12 km standard telecommunication dark fiber in a real-world environment. A time-cost analysis of the sifted, error-corrected, and secret key rates relative to the raw key rate is presented, and the scalability of our implementation with respect to higher secret key rates is discussed.

Xiaofan Mo; Itzel Lucio Martinez; Philip Chan; Chris Healey; Steve Hosier; Wolfgang Tittel

2011-05-18T23:59:59.000Z

244

Method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H (tritium) concentrations of xylem waters and subsurface waters using time series sampling  

DOE Patents [OSTI]

A method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H concentrations of xylem and subsurface waters using time series sampling, insulating sampling chambers, and combined .sup.18 O/.sup.16 O, .sup.2 H/.sup.1 H and .sup.3 H concentration data on transpired water. The method involves collecting water samples transpired from living plants and correcting the measured isotopic compositions of oxygen (.sup.18 O/.sup.16 O) and hydrogen (.sup.2 H/.sup.1 H and/or .sup.3 H concentrations) to account for evaporative isotopic fractionation in the leafy material of the plant.

Smith, Brian (1126 Delaware St., Berkeley, CA 94702); Menchaca, Leticia (1126 Delaware St., Berkeley, CA 94702)

1999-01-01T23:59:59.000Z

245

Analysis of influence of fuel price on individual activity-travel time expenditure  

Science Journals Connector (OSTI)

Abstract Fluctuation in fuel prices may lead to adaptations in people?s activity-travel behavior. Compared to other triggers of behavioral change, the impact of fuel prices has received only scant attention in the literature, especially with respect to short-run change in activity-travel behavior. To gain insight into this issue, travel diaries of a representative sample of individuals in the Netherlands who use the car for daily travel were analyzed. Seemingly unrelated regression analysis was used to examine the effects of fuel price on people?s travel time expenditures for different kinds of activities, differentiating between weekdays and weekends. The results indicate that fuel price is negatively correlated with travel time expenditures by car, and that this relationship differs between weekdays and weekends. When faced with increasing fuel prices, people seem to prefer reducing travel time expenditure by car for compulsory trips more than for leisure trips.

Dujuan Yang; Harry Timmermans

2013-01-01T23:59:59.000Z

246

Sensory impact of skin contact on white wines characterized by descriptive analysis, time–intensity analysis and temporal dominance of sensations analysis  

Science Journals Connector (OSTI)

Abstract In white wine fermentation, extended skin contact of crushed grapes is frequently used to increase the varietal aromas of white Riesling and Gewürztraminer wines. At the same time, phenolic compounds are extracted which can yield significant increases in bitterness and/or astringency. Descriptive analysis (DA), time–intensity analysis (TI) and temporal dominance of sensation (TDS) analysis were used to evaluate the changes in flavor of Riesling and Gewürztraminer wines made with varying skin contact times. DA showed that Riesling wines differed only in bitterness and color. In contrast, Gewürztraminer wines varied significantly in bitterness, sweetness, sourness, and astringency as well as for several aroma notes and color. 2009 and 2010 Gewürztraminer wines increased in intensity of honey/caramel, floral, and lemon aromas as well as yellow color, whereas peach/apricot was only significant in 2009 and apple and green grass/green banana only in 2010. Regarding the temporal properties of orally perceived modalities, bitterness TI curves recorded from Gewürztraminer differed significantly in maximum intensity and area under the curve, while Riesling showed no significant differences in any TI parameter. Increasing skin contact altered the dominance of orally perceived attributes. Fermenting the grapes completely on their skins produced a wine, which was significantly more bitter than all other wines according to TI and DA. However TDS analysis showed that the dominating sensation in this wine was not the bitter taste but the astringent mouth feel. TDS revealed further subtle differences caused by botrytized grape material, altering sourness and astringent perception.

Martina Sokolowsky; Annett Rosenberger; Ulrich Fischer

2015-01-01T23:59:59.000Z

247

Specification and Analysis of the AER/NCA Active Network Protocol Suite in Real-Time Maude  

E-Print Network [OSTI]

Specification and Analysis of the AER/NCA Active Network Protocol Suite in Real-Time Maude Peter-Time Maude tool and the Maude formal methodology to the specification and analysis of the AER/NCA suite-sensitive behavior, the presence of probabilistic algorithms, and the composability of its components, AER/NCA poses

Ã?lveczky, Peter Csaba

248

Multilinear Dynamical Systems for Tensor Time Series  

E-Print Network [OSTI]

the temperature at 5 S, 125 W? For stock price data, one may investigate how the stock prices of electric car

Russell, Stuart

249

Predicting Time Series with Support Vector Machines  

E-Print Network [OSTI]

Termination Section No. 3 CF4 Section Name: Clinical Finance Approval Date: 12/15/05, 01/24/07, 11 Termination Section No. 3 CF4 Section Name: Clinical Finance Approval Date: 12/15/05, 01/24/07, 11

250

Signal extraction for nonstationary multivariate time series  

E-Print Network [OSTI]

-0.06-0.04-0.020.000.020.040.06 Total Core Figure 1: Core and Total PCE inflation, 1986 through 2010 information from Core inflation? · We use the Personal Consumption Expenditures (PCE) Core price index Trends (LLM): Total PCE Year 1990 1995 2000 2005 2010 -0.06-0.04-0.020.000.020.040.06 Total Trend CIs

Johnson, Raymond L.

251

Wind Speed Prediction Via Time Series Modeling.  

E-Print Network [OSTI]

??Projected construction of nearby wind farms motivates this study of statistical forecasting of wind speed, for which accurate prediction is critically important to the fluid… (more)

Alexander, Daniel

2009-01-01T23:59:59.000Z

252

Time Series Evaluation of Portal Monitor Data  

SciTech Connect (OSTI)

Radiation portal monitors screen cargo and personal vehicle traffic at international border crossings to detect and interdict illicit sources which may be present in the commerce stream. One difficulty faced by RPM systems is the prospect of false alarms, or undesired alarms due to background fluctuation, or Naturally-Occurring Radioactive Material (NORM) sources in the commerce stream. In general, NORM alarms represent a significant fraction of the nuisance alarms at international border crossings, particularly with Polyvinyl-Toluene (PVT) RPM detectors, which have only very weak spectral differentiation capability. With PVT detectors, the majority of detected photon events fall within the Compton continuum of the material, allowing for very little spectral information to be preserved [1]. Previous work has shown that these detectors can be used for limited spectroscopy, utilizing around 8 spectral bins to further differentiate some NORM and other nuisance sources [2]. NaI based systems achieve much more detailed spectral resolution from each measurement of a source, but still combine all measurements over a vehicle's occupancy in order to arrive at a spectrum to be analyzed.

Robinson, Sean M.; Bender, Sarah E.; Lopresti, Charles A.; Woodring, Mitchell L.

2008-12-08T23:59:59.000Z

253

High-Performance Computing for Real-Time Grid Analysis and Operation  

SciTech Connect (OSTI)

Power grids worldwide are undergoing an unprecedented transition as a result of grid evolution meeting information revolution. The grid evolution is largely driven by the desire for green energy. Emerging grid technologies such as renewable generation, smart loads, plug-in hybrid vehicles, and distributed generation provide opportunities to generate energy from green sources and to manage energy use for better system efficiency. With utility companies actively deploying these technologies, a high level of penetration of these new technologies is expected in the next 5-10 years, bringing in a level of intermittency, uncertainties, and complexity that the grid did not see nor design for. On the other hand, the information infrastructure in the power grid is being revolutionized with large-scale deployment of sensors and meters in both the transmission and distribution networks. The future grid will have two-way flows of both electrons and information. The challenge is how to take advantage of the information revolution: pull the large amount of data in, process it in real time, and put information out to manage grid evolution. Without addressing this challenge, the opportunities in grid evolution will remain unfulfilled. This transition poses grand challenges in grid modeling, simulation, and information presentation. The computational complexity of underlying power grid modeling and simulation will significantly increase in the next decade due to an increased model size and a decreased time window allowed to compute model solutions. High-performance computing is essential to enable this transition. The essential technical barrier is to vastly increase the computational speed so operation response time can be reduced from minutes to seconds and sub-seconds. The speed at which key functions such as state estimation and contingency analysis are conducted (typically every 3-5 minutes) needs to be dramatically increased so that the analysis of contingencies is both comprehensive and real time. An even bigger challenge is how to incorporate dynamic information into real-time grid operation. Today’s online grid operation is based on a static grid model and can only provide a static snapshot of current system operation status, while dynamic analysis is conducted offline because of low computational efficiency. The offline analysis uses a worst-case scenario to determine transmission limits, resulting in under-utilization of grid assets. This conservative approach does not necessarily lead to reliability. Many times, actual power grid scenarios are not studied, and they will push the grid over the edge and resulting in outages and blackouts. This chapter addresses the HPC needs in power grid analysis and operations. Example applications such as state estimation and contingency analysis are given to demonstrate the value of HPC in power grid applications. Future research directions are suggested for high performance computing applications in power grids to improve the transparency, efficiency, and reliability of power grids.

Huang, Zhenyu; Chen, Yousu; Chavarría-Miranda, Daniel

2013-10-31T23:59:59.000Z

254

Fermilab Lecture Series and Events  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Academic Lecture Series Academic Lecture Series Neutrino Oscillations Schedule Day Speaker Title Location Time March 18 and 25, 2003 (Tuesday) Andre de Gouvea Introduction to Neutrino Oscillations Curia II 10:30 A.M. - noon April 22 and 29, 2003 (Tuesday) Stephen Parke CP Violation in the Neutrino Sector Curia II 10:30 A.M. - noon May 6, 2003 (Tuesday) Boris Kayser The See Saw, and Neutrino Mixing and Oscillation Curia II 10:30 A.M. - noon May 13, 2002 (Tuesday) Boris Kayser Majorana Neutrinos, Majorana Masses, and Double Beta Decay Curia II 10:30 A.M. - noon May 13, 2002 (Tuesday) Boris Kayser Neutrino Puzzles and Leptogenesis Curia II 10:30 A.M. - noon Lattice QCD and the CKM Matrix: What, Why, and When You Should Believe. A series of four lectures reviewing the status and prospects of Lattice QCD

255

Cycle time versus throughput analysis: an overall framework for generating simulation-based cycle time-throughput curves  

Science Journals Connector (OSTI)

A simulation-based cycle time-throughput curve requires a large amount of simulation output data, and an experimentation framework is needed to enhance the precision and accuracy of a simulation-based cycle time-throughput curve. In this research, approaches ...

Sungmin Park; Gerald T. Mackulak; John W. Fowler

2001-12-01T23:59:59.000Z

256

Posters Objective Analysis Schemes to Monitor Atmospheric Radiation Measurement Data in Near Real-Time  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

7 7 Posters Objective Analysis Schemes to Monitor Atmospheric Radiation Measurement Data in Near Real-Time M. Splitt University of Oklahoma Norman, Oklahoma Recent work in this area by Charles Wade (1987) lays out the groundwork for monitoring data quality for projects with large networks of instruments such as the Atmospheric Radiation Measurement (ARM) Program. Wade generated objectively analyzed fields of meteorological variables (temperature, pressure, humidity, and wind) and then compared the objectively analyzed value at the sensor location with the value produced by the sensor. Wade used a Barne's objective analysis scheme to produce objective data values for a given meteorological variable (q) in two- dimensional space. The objectively analyzed value should

257

Transient analysis of printed lines using finite-difference time-domain method  

SciTech Connect (OSTI)

Comprehensive studies of ultra-wideband pulses and electromagnetic coupling on printed coupled lines have been performed using full-wave 3D finite-difference time-domain analysis. Effects of unequal phase velocities of coupled modes, coupling between line traces, and the frequency dispersion on the waveform fidelity and crosstalk have been investigated in detail. To discriminate the contributions of different mechanisms into pulse evolution, single and coupled microstrip lines without (?r?=?1) and with (?r?>?1) dielectric substrates have been examined. To consistently compare the performance of the coupled lines with substrates of different permittivities and transients of different characteristic times, a generic metric similar to the electrical wavelength has been introduced. The features of pulse propagation on coupled lines with layered and pedestal substrates and on the irregular traces have been explored. Physical interpretations of the simulation results are discussed in the paper.

Ahmed, Shahid [JLAB

2013-01-01T23:59:59.000Z

258

A NEAR REAL-TIME BERYLLIUM MONITOR WITH CAM AND WIPE ANALYSIS CAPABILITIES  

SciTech Connect (OSTI)

Science & Engineering Associates, Inc. (SEA), under contract No. DE-AC26-00NT40768, was tasked by the US Department of Energy--National Energy Technology Laboratory to develop and test a near real-time beryllium monitor for airborne and surface measurements. Recent public awareness of the health risks associated with exposure to beryllium has underscored the need for better, faster beryllium monitoring capabilities within the DOE. A near real-time beryllium monitor will offer significant improvements over the baseline monitoring technology currently in use. Whereas the baseline technology relies upon collecting an air sample on a filter and the subsequent analysis of the filter by an analytical laboratory, this effort developed a monitor that offers near real-time measurement results while work is in progress. Since the baseline typically only offers after-the-fact documentation of exposure levels, the near real-time capability provides a significant increase in worker protection. The beryllium monitor developed utilizes laser induced breakdown spectroscopy, or LIBS as the fundamental measurement technology. LIBS has been used in a variety of laboratory and field based instrumentation to provide real-time, and near-real-time elemental analysis capabilities. LIBS is an analytical technique where a pulsed high energy laser beam is focused to a point on the sample to be interrogated. The high energy density produces a small high temperature plasma plume, sometimes called a spark. The conditions within this plasma plume result in the constituent atoms becoming excited and emitting their characteristic optical emissions. The emission light is collected and routed to an optical spectrometer for quantitative spectral analysis. Each element has optical emissions, or lines, of a specific wavelength that can be used to uniquely identify that element. In this application, the intensity of the beryllium emission is used to provide a quantitative measure of the abundance of the element in the sample. The monitor can be operated in one of two modes, as a continuous air monitor (CAM), or as a wipe monitor. In its CAM mode, the monitor collects an air sample for a user programmable sampling time on a conventional mixed cellulose ester (MCE) filter. The monitor can also be used in a wipe analysis mode, where the user can load up to 60 previously collected wipe samples, typically obtained on 47 mm filter media, into disposable filter cassettes. Under this effort, a beryllium monitor was designed, fabricated and tested. During laboratory testing, the monitor's measurement performance met the stated measurement objectives at the outset of the project. A typical minimum detectable beryllium mass for the monitor is below the 0.2 mg/m{sup 3} goal of the project. Field-testing of the monitor show it to exhibit extremely good sensitivity to very low levels of beryllium. On a per spark basis, the monitor has been shown to be capable of detecting a few tens of picograms of beryllium. At the culmination of the project, the beryllium CAM unit was delivered to the U.S. DOE-Rocky Flats Environmental Management Site where it is undergoing additional on-site evaluations.

D.T. Kendrick; Steven Saggese

2002-12-01T23:59:59.000Z

259

FPGA Based Real-time Network Traffic Analysis using Traffic Dispersion Patterns  

SciTech Connect (OSTI)

The problem of Network Traffic Classification (NTC) has attracted significant amount of interest in the research community, offering a wide range of solutions at various levels. The core challenge is in addressing high amounts of traffic diversity found in today's networks. The problem becomes more challenging if a quick detection is required as in the case of identifying malicious network behavior or new applications like peer-to-peer traffic that have potential to quickly throttle the network bandwidth or cause significant damage. Recently, Traffic Dispersion Graphs (TDGs) have been introduced as a viable candidate for NTC. The TDGs work by forming a network wide communication graphs that embed characteristic patterns of underlying network applications. However, these patterns need to be quickly evaluated for mounting real-time response against them. This paper addresses these concerns and presents a novel solution for real-time analysis of Traffic Dispersion Metrics (TDMs) in the TDGs. We evaluate the dispersion metrics of interest and present a dedicated solution on an FPGA for their analysis. We also present analytical measures and empirically evaluate operating effectiveness of our design. The mapped design on Virtex-5 device can process 7.4 million packets/second for a TDG comprising of 10k flows at very high accuracies of over 96%.

Khan, F; Gokhale, M; Chuah, C N

2010-03-26T23:59:59.000Z

260

Series Transmission Line Transformer  

DOE Patents [OSTI]

A series transmission line transformer is set forth which includes two or more of impedance matched sets of at least two transmissions lines such as shielded cables, connected in parallel at one end ans series at the other in a cascading fashion. The cables are wound about a magnetic core. The series transmission line transformer (STLT) which can provide for higher impedance ratios and bandwidths, which is scalable, and which is of simpler design and construction.

Buckles, Robert A. (Livermore, CA); Booth, Rex (Livermore, CA); Yen, Boris T. (El Cerrito, CA)

2004-06-29T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Nuclear Science Series: Radiochemistry  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

eBooks Radiochemistry Nuclear Science Series: Radiochemistry These volumes are publicly accessible via the Library Catalog or the links below. Question? 667-5809 Email Scope...

262

Coda-wave interferometry analysis of time-lapse VSP data for monitoring geological carbon sequestration  

SciTech Connect (OSTI)

Injection and movement/saturation of carbon dioxide (CO2) in a geological formation will cause changes in seismic velocities. We investigate the capability of coda-wave interferometry technique for estimating CO2-induced seismic velocity changes using time-lapse synthetic vertical seismic profiling (VSP) data and the field VSP datasets acquired for monitoring injected CO2 in a brine aquifer in Texas, USA. Synthetic VSP data are calculated using a finite-difference elastic-wave equation scheme and a layered model based on the elastic Marmousi model. A possible leakage scenario is simulated by introducing seismic velocity changes in a layer above the CO2 injection layer. We find that the leakage can be detected by the detection of a difference in seismograms recorded after the injection compared to those recorded before the injection at an earlier time in the seismogram than would be expected if there was no leakage. The absolute values of estimated mean velocity changes, from both synthetic and field VSP data, increase significantly for receiver positions approaching the top of a CO2 reservoir. Our results from field data suggest that the velocity changes caused by CO2 injection could be more than 10% and are consistent with results from a crosswell tomogram study. This study demonstrates that time-lapse VSP with coda-wave interferometry analysis can reliably and effectively monitor geological carbon sequestration.

Zhou, R.; Huang, L.; Rutledge, J.T.; Fehler, M.; Daley, T.M.; Majer, E.L.

2009-11-01T23:59:59.000Z

263

Argonne CNM: 2012 Colloquium Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 Colloquium Series 2 Colloquium Series 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | Date Title Special Colloquium December 13, 2012 "Pathways to Complex Matter Far-Away-From Equilibrium: Developing Spatiotemporal Tools," by Gopal Shenoy, Argonne National Laboratory, hostged by Daniel Lopez Abstract: From the Big Bang to the coming of humankind, every manifestation of nature has exhibited processes far-away-from equilibrium leading to increasingly complex structural orders from geological to atomic length and time scales. Examples include the evolution of galaxies, hurricanes, stars, and planets; prebiotic reactions; cyclical reactions; photosynthesis; and life itself. The organizational spatiotemporal evolution in soft, hard, and biological matter also follows the same path. It begins from a far-from-equilibrium state and develops over time into organizations with length scales between atoms and small molecules on the one hand and mesoscopic matter on the other.

264

Running time variability and resource allocation : a data-driven analysis of high-frequency bus operations  

E-Print Network [OSTI]

Running time variability is one of the most important factors determining service quality and operating cost of high-frequency bus transit. This research aims to improve performance analysis tools currently used in the bus ...

Sánchez-Martínez, Gabriel Eduardo

2013-01-01T23:59:59.000Z

265

Proceedings of Healthy Buildings 2009 Paper 336 Time-Scale Analysis for Reactive Deposition of Ozone via Passive Reactive  

E-Print Network [OSTI]

Proceedings of Healthy Buildings 2009 Paper 336 Time-Scale Analysis for Reactive Deposition) homogeneous reactions with indoor pollutants. The #12;Proceedings of Healthy Buildings 2009 Paper 336 latter

Siegel, Jeffrey

266

Analysis of Wind Power and Load Data at Multiple Time Scales  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

47E 47E ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY Analysis of Wind Power and Load Data at Multiple Time Scales Katie Coughlin and Joseph H. Eto Environmental Energy Technologies Division December 2010 The work described in this report was funded by the Federal Energy Regulatory Commission, Office of Electric Reliability. The Lawrence Berkeley National Laboratory is operated by the University of California for the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the

267

Implementing advanced data analysis techniques in near-real-time materials accounting  

SciTech Connect (OSTI)

Materials accounting for special nuclear material in fuel cycle facilities is implemented more efficiently by applying decision analysis methods, based on estimation and detection theory, to analyze process data for missing material. These methods are incorporated in the computer program DECANAL, which calculates sufficient statistics containing all accounting information, sets decision thresholds, and compares these statistics to the thresholds in testing the hypothesis H/sub 0/ of no missing material against the alternative H/sub 1/ that material is missing. DECANAL output provides alarm charts indicating the likelihood of missing material and plots of statistics that estimate materials loss. This program is a useful tool for aggregating and testing materials accounting data for timely detection of missing material.

Markin, J.T.; Baker, A.L.; Shipley, J.P.

1980-01-01T23:59:59.000Z

268

AEP Ohio gridSMART Demonstration Project Real-Time Pricing Demonstration Analysis  

SciTech Connect (OSTI)

This report contributes initial findings from an analysis of significant aspects of the gridSMART® Real-Time Pricing (RTP) – Double Auction demonstration project. Over the course of four years, Pacific Northwest National Laboratory (PNNL) worked with American Electric Power (AEP), Ohio and Battelle Memorial Institute to design, build, and operate an innovative system to engage residential consumers and their end-use resources in a participatory approach to electric system operations, an incentive-based approach that has the promise of providing greater efficiency under normal operating conditions and greater flexibility to react under situations of system stress. The material contained in this report supplements the findings documented by AEP Ohio in the main body of the gridSMART report. It delves into three main areas: impacts on system operations, impacts on households, and observations about the sensitivity of load to price changes.

Widergren, Steven E.; Subbarao, Krishnappa; Fuller, Jason C.; Chassin, David P.; Somani, Abhishek; Marinovici, Maria C.; Hammerstrom, Janelle L.

2014-02-01T23:59:59.000Z

269

Low time resolution analysis of polar ice cores cannot detect impulsive nitrate events  

E-Print Network [OSTI]

Ice cores are archives of climate change and possibly large solar proton events (SPEs). Wolff et al. (2012) used a single event, a nitrate peak in the GISP2-H core, which McCracken et al. (2001a) time associated with the poorly quantified 1859 Carrington event, to discredit SPE-produced, impulsive nitrate deposition in polar ice. This is not the ideal test case. We critique the Wolff et al. analysis and demonstrate that the data they used cannot detect impulsive nitrate events because of resolution limitations. We suggest re-examination of the top of the Greenland ice sheet at key intervals over the last two millennia with attention to fine resolution and replicate sampling of multiple species. This will allow further insight into polar depositional processes on a sub-seasonal scale, including atmospheric sources, transport mechanisms to the ice sheet, post-depositional interactions, and a potential SPE association.

Smart, D F; Melott, A L; Laird, C M

2015-01-01T23:59:59.000Z

270

Opposite power series  

Science Journals Connector (OSTI)

In order to analyze the singularities of a power series function P(t) on the boundary of its convergent disc, we introduced the space @W(P) of opposite power series in the opposite variable s=1/t, where P(t) was, mainly, the growth function (Poincare ...

Kyoji Saito

2012-10-01T23:59:59.000Z

271

Testing the Results of Static Worst-Case Execution-Time Analysis P. Puschner and R. Nossaly  

E-Print Network [OSTI]

Testing the Results of Static Worst-Case Execution-Time Analysis P. Puschner and R. Nossaly provided by the user. This pa- per presents a method for testing the results of static WCET analysis. The proposed test method is a black- box test method that uses a genetic algorithm (GA) for test

272

A real-time GIS for the analysis of a traffic system C. Claramunt, E. Peytchev and A. Bargiela  

E-Print Network [OSTI]

A real-time GIS for the analysis of a traffic system C. Claramunt, E. Peytchev and A. Bargiela describes a prototype development of a new system for the integration of real-time traffic data within a GIS in which systems are designed and used in many application fields. Geographical Information Systems (GIS

Bargiela, Andrzej

273

Real-Time Quantitative Analysis of Combustion-Generated Polycyclic Aromatic Hydrocarbons by Resonance-Enhanced Multiphoton Ionization Time-of-Flight Mass Spectrometry  

Science Journals Connector (OSTI)

Real-Time Quantitative Analysis of Combustion-Generated Polycyclic Aromatic Hydrocarbons by Resonance-Enhanced Multiphoton Ionization Time-of-Flight Mass Spectrometry ... Field data1 suggest that naphthalene, fluorene, and anthracene are among the most abundant PAH products of incomplete hydrocarbon production. ... The sample transfer line is 6.35 mm diameter, quartz-lined stainless steel tubing (Alltech, Deerfield, IL) that is heated to 250?300 °C using flexible cable heaters (Omega Engineering, Stamford, CT). Care is taken to uniformly heat the sample transfer line, since the efficiency of the line is reduced dramatically by the presence of cold spots. ...

Christopher M. Gittins; Marco J. Castaldi; Selim M. Senkan; Eric A. Rohlfing

1997-02-01T23:59:59.000Z

274

The Geostationary Operational Environment Satellite R-Series Program  

E-Print Network [OSTI]

: GOES-R is a satellite series carrying six instruments designed to enhance weather forecasting, severeGOES-R The Geostationary Operational Environment Satellite R-Series Program Frequently Asked. The GOES-R series of satellites will fly improved spacecraft and instrument technologies, for more timely

Mojzsis, Stephen J.

275

Average strain rate in the Italian crust inferred from a permanent GPS network – I. Statistical analysis of the time-series of permanent GPS stations  

Science Journals Connector (OSTI)

......phreatic effects and the height of the water table could play a major role at MEDI...stations caused by common sources, such as atmospheric refraction or mismodelling of the GPS...and the statistics of precision signal generators, Proc. IEEE, 54, 207-220. 3 Becker......

Alessandro Caporali

2003-10-01T23:59:59.000Z

276

Investigation of the effects of correlated measurement errors in time series analysis techniques applied to nuclear material accountancy data. [Program COVAR  

SciTech Connect (OSTI)

It has been shown in previous work that the Kalman Filter and Linear Smoother produces optimal estimates of inventory and loss from a material balance area. The assumptions of the Kalman Filter/Linear Smoother approach assume no correlation between inventory measurement error nor does it allow for serial correlation in these measurement errors. The purpose of this report is to extend the previous results by relaxing these assumptions to allow for correlation of measurement errors. The results show how to account for correlated measurement errors in the linear system model of the Kalman Filter/Linear Smoother. An algorithm is also included for calculating the required error covariance matrices.

Pike, D.H.; Morrison, G.W.; Downing, D.J.

1982-04-01T23:59:59.000Z

277

The U-tube sampling methodology and real-time analysis of geofluids  

SciTech Connect (OSTI)

The U-tube geochemical sampling methodology, an extension of the porous cup technique proposed by Wood [1973], provides minimally contaminated aliquots of multiphase fluids from deep reservoirs and allows for accurate determination of dissolved gas composition. The initial deployment of the U-tube during the Frio Brine Pilot CO{sub 2} storage experiment, Liberty County, Texas, obtained representative samples of brine and supercritical CO{sub 2} from a depth of 1.5 km. A quadrupole mass spectrometer provided real-time analysis of dissolved gas composition. Since the initial demonstration, the U-tube has been deployed for (1) sampling of fluids down gradient of the proposed Yucca Mountain High-Level Waste Repository, Armagosa Valley, Nevada (2) acquiring fluid samples beneath permafrost in Nunuvut Territory, Canada, and (3) at a CO{sub 2} storage demonstration project within a depleted gas reservoir, Otway Basin, Victoria, Australia. The addition of in-line high-pressure pH and EC sensors allows for continuous monitoring of fluid during sample collection. Difficulties have arisen during U-tube sampling, such as blockage of sample lines from naturally occurring waxes or from freezing conditions; however, workarounds such as solvent flushing or heating have been used to address these problems. The U-tube methodology has proven to be robust, and with careful consideration of the constraints and limitations, can provide high quality geochemical samples.

Freifeld, Barry; Perkins, Ernie; Underschultz, James; Boreham, Chris

2009-03-01T23:59:59.000Z

278

University Seminar Series Sponsored by the Nanotechnology Graduate Program  

E-Print Network [OSTI]

University Seminar Series Sponsored by the Nanotechnology Graduate Program Imaging Processes in biology and medicine, electrokinetics, and flow control. EVENT DETAILS DATE: February 27, 2013 TIME: 11

Fisher, Frank

279

A methodology for global-sensitivity analysis of time-dependent outputs in systems biology modelling  

Science Journals Connector (OSTI)

...on a desktop computer. This is compared...features of the system. The important...resistance. The analysis also identified...and uncertainty analysis: applications to large-scale systems, vol. 2. Boca...for sensitivity analysis of large models...European Symp. on Computer Aided Process...

2012-01-01T23:59:59.000Z

280

Resumming the string perturbation series  

E-Print Network [OSTI]

We use the AdS/CFT correspondence to study the resummation of a perturbative genus expansion appearing in the type II superstring dual of ABJM theory. Although the series is Borel summable, its Borel resummation does not agree with the exact non-perturbative answer due to the presence of complex instantons. The same type of behavior appears in the WKB quantization of the quartic oscillator in Quantum Mechanics, which we analyze in detail as a toy model for the string perturbation series. We conclude that, in these examples, Borel summability is not enough for extracting non-perturbative information, due to non-perturbative effects associated to complex instantons. We also analyze the resummation of the genus expansion for topological string theory on local $\\mathbb P^1 \\times \\mathbb P^1$, which is closely related to ABJM theory. In this case, the non-perturbative answer involves membrane instantons computed by the refined topological string, which are crucial to produce a well-defined result. We give evidence that the Borel resummation of the perturbative series requires such a non-perturbative sector.

Alba Grassi; Marcos Marino; Szabolcs Zakany

2015-02-10T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Focus Series | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Better Buildings Partners Focus Series Focus Series On-Bill Financing Brings Lenders and Homeowners on Board bbnpfocusseriescew9-2-14.jpg Read how Clean Energy Works'...

282

Distinguished Lecturers Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Videos Videos Lawrence Berkeley National Laboratory Environmental Energy Technologies Division Distinguished Lecture Series Environmental Energy Technologies Division Distinguished Lecture Series Videos Long Fuse, Big Bang: Thomas Edison, Electricity, and the Locus of Innovation Andrew Hargadon, October 22, 2012 Climate Change Hits Home: Impacts on the Built Environment and Health John Spengler, June 18, 2012 High Comfort-Low Impact, From Buildings to Cities Matthias Schuler, April 30, 2012 Emissions Trading and Climate Finance: Is 2012 the Dead End or the Crossroads? Marc Stuart, January 27, 2012 Advances in Global Climate Modeling for Scientific Understanding and Predictability V. Ramaswamy, October 7, 2011 How is Building Energy Use Related to Occupant Behaviors and Building Usage

283

Distinguished Lecturers Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Past Seminars Past Seminars Lawrence Berkeley National Laboratory Environmental Energy Technologies Division Distinguished Lecture Series Environmental Energy Technologies Division Distinguished Lecture Series Andrew Hargadon October 22, 2012 Long Fuse, Big Bang: Thomas Edison, Electricity, and the Locus of Innovation Andrew Hargadon Charles J. Soderquist Chair in Entrepreneurship Professor of Technology Management at the Graduate School of Management University of California, Davis John Spengler June 18, 2012 Climate Change Hits Home: Impacts on the Built Environment and Health John Spengler Akira Yamaguchi Professor of Environmental Health & Human Habitation Harvard School of Public Health and Director of the Sustainability and Environmental Management Program Harvard Extension School

284

Analyzing the impact of environmental variables on the repayment time for solar farms under feed-in tariff  

Science Journals Connector (OSTI)

Using a bootstrap analysis of solar irradiation time series, we model solar farms which sell their power output at ... one used in the province of Ontario, Canada. We show that the feed-in tariff ... remove the f...

Bin Lu; Matt Davison

2013-03-01T23:59:59.000Z

285

A MODEL FOR TIME-AND BUDGET-CONSTRAINED ACTIVITY DEMAND ANALYSIS  

E-Print Network [OSTI]

the derivation of a system of demands for activity participation by applying microeconomic theory in a time-price to be of discrete choices (e.g., Train et al. 1987); many models of jointly estimated demand responses lack-time demand elasticities, values of time, and other behavioral properties. METHODOLOGY Microeconomic

Kockelman, Kara M.

286

JOURNAL OF THE EXPERIMENTAL ANALYSIS OF BEHAVIOR TIME HORIZONS IN RATS: THE EFFECT OF OPERANT  

E-Print Network [OSTI]

-independent access to less costly food at the average delay shown by the earned-time group. Rats in the matched to less costly food. Two of the earned-time rats showed an increased time horizon relative to that shown of food, progressive-ratio schedule, patches, lever press, rats In foraging for food, animals distribute

Timberlake, William D.

287

The LTS timing analysis program : user%3CU%2B2019%3Es manual and description of the methods of analysis.  

SciTech Connect (OSTI)

The LTS Timing Analysis program described in this report uses signals from the Tempest Lasers, Pulse Forming Lines, and Laser Spark Detectors to carry out calculations to quantify and monitor the performance of the the Z-Accelerator's laser triggered SF6 switches. The program analyzes Z-shots beginning with Z2457, when Laser Spark Detector data became available for all lines.

Armstrong, Darrell Jewell; Schwarz, Jens

2013-08-01T23:59:59.000Z

288

JOURNAL OF STRUCTURAL ENGINEERING / MAY 2001 / 527 APPARENT PERIODS OF A BUILDING. II: TIME-FREQUENCY ANALYSIS  

E-Print Network [OSTI]

of a two-part paper, the analysis of the apparent frequency of a seven-story reinforced-concrete hotel. The results also suggest ``self healing'' believed to result from settlement of the soil with time and dynamic compaction from aftershock shaking. Implications of such high variability of the system frequency

Southern California, University of

289

Mercury + VisIt: Integration of a Real-Time Graphical Analysis Capability into a Monte Carlo Transport Code  

SciTech Connect (OSTI)

Validation of the problem definition and analysis of the results (tallies) produced during a Monte Carlo particle transport calculation can be a complicated, time-intensive processes. The time required for a person to create an accurate, validated combinatorial geometry (CG) or mesh-based representation of a complex problem, free of common errors such as gaps and overlapping cells, can range from days to weeks. The ability to interrogate the internal structure of a complex, three-dimensional (3-D) geometry, prior to running the transport calculation, can improve the user's confidence in the validity of the problem definition. With regard to the analysis of results, the process of extracting tally data from printed tables within a file is laborious and not an intuitive approach to understanding the results. The ability to display tally information overlaid on top of the problem geometry can decrease the time required for analysis and increase the user's understanding of the results. To this end, our team has integrated VisIt, a parallel, production-quality visualization and data analysis tool into Mercury, a massively-parallel Monte Carlo particle transport code. VisIt provides an API for real time visualization of a simulation as it is running. The user may select which plots to display from the VisIt GUI, or by sending VisIt a Python script from Mercury. The frequency at which plots are updated can be set and the user can visualize the simulation results as it is running.

O'Brien, M J; Procassini, R J; Joy, K I

2009-03-09T23:59:59.000Z

290

4.6 MATLAB Laboratory Experiment Purpose: This experiment presents the frequency domain analysis of continuous-time  

E-Print Network [OSTI]

4.6 MATLAB Laboratory Experiment Purpose: This experiment presents the frequency domain analysis of continuous-time linear systems using MATLAB. The impulse, step, sinusoidal, and exponential responses. In addition, MATLAB will be used to perform the partial fraction expansion and to find the inverse Laplace

Gajic, Zoran

291

Energy Management Webinar Series  

Broader source: Energy.gov [DOE]

Boost your knowledge on how to implement an energy management system through this four-part webinar series from the Superior Energy Performance program. Each webinar introduces various elements of the ISO 50001 energy management standard—based on the Plan-Do-Check-Act approach—and the associated steps of DOE's eGuide for ISO 50001 software tool.

292

Global Health Seminar Series  

E-Print Network [OSTI]

Bay Area Global Health Seminar Series Moving beyond millennium targets in global health: The challenges of investing in health and universal health coverage Although targets can help to focus global health efforts, they can also detract attention from deeper underlying challenges in global health

Klein, Ophir

293

Global Health Seminar Series  

E-Print Network [OSTI]

Bay Area Global Health Seminar Series Monday, January 27, 2014 2:30pm ­ 4:00pm (Reception to follow at the Center for Health Policy and the Woods Institute for the Environment. He studies how economic, political, and natural environments affect population health in developing countries using a mix of experimental

Klein, Ophir

294

Performance Analysis of the Sporadic Server Implementation in Real-Time Specification for Java  

Science Journals Connector (OSTI)

In this paper, we introduce the implementation ofthe Sporadic Server algorithm at the user level in Real TimeJava. That is, we do not modify the specification of the JavaVirtual Machine (JVM) so our proposal runs without problemson every JVM with support ... Keywords: real time java, aperiodic handling

Carlos M. Tripode; Rodrigo Santos; Javier Orozco

2011-11-01T23:59:59.000Z

295

Empirical timing analysis of CPUs and delay fault tolerant design using partial redundancy  

E-Print Network [OSTI]

and the dynamic frequency-step-down takes place before a pipe flush, and retry is issued. The significant timing overhead associated with the retry is offset by the rarity of the timing violation events. Simulation results on ISCAS Benchmark circuits show that 10...

Chang, Sanghoan

2009-05-15T23:59:59.000Z

296

Comprehensive Joint Time-Frequency Analysis toward Condition Based Maintenance Regimes for Electrical and  

E-Print Network [OSTI]

measure is proposed for comparing vibration data from multiple sensors toward the creation of new and classification technique is proposed using mutual information measures in the time-frequency domain. The time bounding regions. Electrical, reflectometry-based methods of health evaluation are proposed

Almor, Amit

297

Trade-off Analysis of Decision Support Systems for Time Sensitive  

E-Print Network [OSTI]

USYouthSoccerPlayers NumberofRegisteredUSYouthSoccerPlayers Time (Years) Registered US Youth Soccer Players vs. Time Virginia · PROBLEM STATEMENT · MISSION REQUIREMENTS · DESIGN OF EXPERIMENT · VALUE HIERARCHY/ UTILITY · CONCLUSION 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 TotalNumberofRegistered

298

Comparative analysis of two different middleware approaches for reconfiguration of distributed real-time systems  

Science Journals Connector (OSTI)

Software-based reconfiguration of distributed real-time systems is a complex problem with many sides to it ranging from system-wide concerns down to the intrinsic non-robust nature of the specific middleware layer and the used programming techniques. ... Keywords: Distributed systems, Middleware, Real-time, Reconfiguration

Marisol García Valls; Pablo Basanta Val

2014-02-01T23:59:59.000Z

299

Strategic backdrop analysis for fossil fuel planning. Task 2 report (New Task Series), The Base Case. Report 473-117-08/01  

SciTech Connect (OSTI)

This report describes a base case analysis performed using the strategic backdrop analytical framework developed by The Futures Group to facilitate fossil fuel planning within the Department of Energy. It builds upon the data base compiled in the default case previously submitted but uses a different set of energy technology assumptions. Objectives of the strategic backdrop analysis project are: (1) to delineate alternative socioeconomic futures or target worlds for the United States and to derive, for each world, the amount of energy needed to sustain its level of economic activity and lifestyle, assuming no technological changes; (2) to construct an analytical framework that accounts for the flow of energy from the disaggregated end-use target demand sectors back through the distribution and conversion processes to primary resource requirements; (3) to use this framework 1) to analyze how alternative government policies and associated new technologies can change the primary resource needs and fuel mix while still providing the same level of end-use energy service for the target world, and 2) to highlight resource constraints, program inconsistencies, and economic, environmental, and social implications; (4) to transfer to DOE personnel the methodology for generating energy targets and accounting for important characteristics of alternative energy policies and technologies.

Not Available

1980-08-01T23:59:59.000Z

300

Measuring False-Positive by Automated Real-Time Correlated Hacking Behavior Analysis  

Science Journals Connector (OSTI)

To solve the contradiction between the trend of more distributed network architecture and the demanding for more centralized correlated analysis to detect more complicated attacks from Intrusion Detection System ...

Jia Wang; Insup Lee

2001-01-01T23:59:59.000Z

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


301

Real-time analysis of aggregate network traffic for anomaly detection  

E-Print Network [OSTI]

The frequent and large-scale network attacks have led to an increased need for developing techniques for analyzing network traffic. If efficient analysis tools were available, it could become possible to detect the attacks, anomalies...

Kim, Seong Soo

2005-08-29T23:59:59.000Z

302

Slow dynamics of a protein backbone in molecular dynamics simulation revealed by time-structure based independent component analysis  

SciTech Connect (OSTI)

We recently proposed the method of time-structure based independent component analysis (tICA) to examine the slow dynamics involved in conformational fluctuations of a protein as estimated by molecular dynamics (MD) simulation [Y. Naritomi and S. Fuchigami, J. Chem. Phys. 134, 065101 (2011)]. Our previous study focused on domain motions of the protein and examined its dynamics by using rigid-body domain analysis and tICA. However, the protein changes its conformation not only through domain motions but also by various types of motions involving its backbone and side chains. Some of these motions might occur on a slow time scale: we hypothesize that if so, we could effectively detect and characterize them using tICA. In the present study, we investigated slow dynamics of the protein backbone using MD simulation and tICA. The selected target protein was lysine-, arginine-, ornithine-binding protein (LAO), which comprises two domains and undergoes large domain motions. MD simulation of LAO in explicit water was performed for 1 ?s, and the obtained trajectory of C{sub ?} atoms in the backbone was analyzed by tICA. This analysis successfully provided us with slow modes for LAO that represented either domain motions or local movements of the backbone. Further analysis elucidated the atomic details of the suggested local motions and confirmed that these motions truly occurred on the expected slow time scale.

Naritomi, Yusuke [Department of Supramolecular Biology, Graduate School of Nanobioscience, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045 (Japan)] [Department of Supramolecular Biology, Graduate School of Nanobioscience, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045 (Japan); Fuchigami, Sotaro, E-mail: sotaro@tsurumi.yokohama-cu.ac.jp [Department of Medical Life Science, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045 (Japan)] [Department of Medical Life Science, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045 (Japan)

2013-12-07T23:59:59.000Z

303

Functional Power Series  

E-Print Network [OSTI]

This work introduces a new functional series for expanding an analytic function in terms of an arbitrary analytic function. It is generally applicable and straightforward to use. It is also suitable for approximating the behavior of a function with a few terms. A new expression is presented for the composite function's n'th derivative. The inverse-composite method is handled in this work also.

Henrik Stenlund

2012-04-24T23:59:59.000Z

304

Global Clock, Physical Time Order and Pending Period Analysis in Multiprocessor Systems  

E-Print Network [OSTI]

In multiprocessor systems, various problems are treated with Lamport's logical clock and the resultant logical time orders between operations. However, one often needs to face the high complexities caused by the lack of logical time order information in practice. In this paper, we utilize the \\emph{global clock} to infuse the so-called \\emph{pending period} to each operation in a multiprocessor system, where the pending period is a time interval that contains the performed time of the operation. Further, we define the \\emph{physical time order} for any two operations with disjoint pending periods. The physical time order is obeyed by any real execution in multiprocessor systems due to that it is part of the truly happened operation orders restricted by global clock, and it is then proven to be independent and consistent with traditional logical time orders. The above novel yet fundamental concepts enables new effective approaches for analyzing multiprocessor systems, which are named \\emph{pending period analy...

Chen, Yunji; Hu, Weiwu

2009-01-01T23:59:59.000Z

305

Argonne CNM: Colloquium Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Colloquium Series Colloquium Series The Center for Nanoscale Materials holds a regular biweekly colloquium on alternate Wednesday afternoons at 4:00 p.m. in Bldg. 440, Room A105/106. The goal of the series is to provide a forum for topical multidisciplinary talks in areas of interest to the CNM and also to offer a mechanism for fostering interactions with potential facility users. Refreshments will be served at 3:45. January 15, 2013 "Friction, Brownian Motion, and Energy Dissipation Mechanisms in Adsorbed Molecules and Molecularly Thin Films: Heating, Electrostatic and Magnetic Effects," by Jacquelin Krim, North Carolina State University, hosted by Diana Berman Abstract: In the study of friction at the nanoscale, phononic, electrostatic, conduction electron, and magnetic effects all contribute to the dissipation mechanisms. Electrostatic and magnetic contributions are increasingly alluded to in the current literature, but they remain poorly characterized. I will first overview the nature of these various contribution, and then report on our observations of magnetic and electrostatic contributions to friction for various systems in the presence and absence of external fields. I will also report on the use of a quartz crystal microbalance with a graphene/Ni(111) electrode to probe frictional heating effects in Kr monolayers sliding on the microbalance electrode in response to its oscillatory motion.

306

Shifting Preferences and Time-Varying Parameters in Demand Analysis: A Monte Carlo Study  

E-Print Network [OSTI]

constant values over time. The LAISF model qualitatively performs similarly to the NLAI, but the LAICF does not. Finally, the NLAI achieves higher levels of the regularity index under the local trend specification while the RM achieves higher regularity...

Kanyama, Isaac Kalonda

2011-05-31T23:59:59.000Z

307

Case study: visual analysis of complex, time-dependent simulation results of a diesel exhaust system  

Science Journals Connector (OSTI)

In previous work we have presented visualization techniques that provide engineers with a high degree of interactivity and flexibility for analyzing large, time-dependent, and high-dimensional data sets resulting from CFD (computational fluid dynamics) ...

Helmut Doleisch; Michael Mayer; Martin Gasser; Roland Wanker; Helwig Hauser

2004-05-01T23:59:59.000Z

308

An analysis of Texas rainfall data and asymptotic properties of space-time covariance estimators  

E-Print Network [OSTI]

This dissertation includes two parts. Part 1 develops a geostatistical method to calibrate Texas NexRad rainfall estimates using rain gauge measurements. Part 2 explores the asymptotic joint distribution of sample space-time covariance estimators...

Li, Bo

2009-06-02T23:59:59.000Z

309

Analysis of oil-pipeline distribution of multiple products subject to delivery time-windows  

E-Print Network [OSTI]

This dissertation defines the operational problems of, and develops solution methodologies for, a distribution of multiple products into oil pipeline subject to delivery time-windows constraints. A multiple-product oil pipeline is a pipeline system...

Jittamai, Phongchai

2006-04-12T23:59:59.000Z

310

Time-Dependent Reliability Analysis of Nuclear Reactor Operators Using Probabilistic Network Models  

Science Journals Connector (OSTI)

Human factors are very important for the reliability of a nuclear power plant. Human behavior has essentially time-dependent nature. The details of thinking and decision making processes are important for deta...

Yoshiaki Oka; Kenji Miyata; Hideki Kodaira…

1988-01-01T23:59:59.000Z

311

Improving data collection and monitoring through real-time data analysis  

Science Journals Connector (OSTI)

Feedback based on real-time data is increasingly important for ICT-based interventions in the developing world. Applications such as facility inventories, summarization of patient data from community health workers, etc. need processes for analyzing ...

P. Lubell-Doughtie; P. Pokharel; M. Johnston; V. Modi

2013-01-01T23:59:59.000Z

312

Data Position Detection Analysis for 1.X time Oversampled Image in Holographic Data Storage  

Science Journals Connector (OSTI)

This paper discusses the marker position detection by the template matching method with 1.X time oversampling image. It was clarified that the detection of marker position can be...

OHTOH, Hiroshi; YAMAMOTO, Manabu

313

Getting a Better Performing Building: Commissioning and Real Time Data Analysis  

E-Print Network [OSTI]

based on real time system operational data. Because of the dynamic nature and complexity of commercial building HVAC systems, they are the perfect target for periodic performance assessments, or recommissioning. Today's buildings are expected to supply...

Barba, M.

2002-01-01T23:59:59.000Z

314

Automatic real-time lip synchronization using LPC analysis and neural networks  

E-Print Network [OSTI]

the process of generating real-time lip sync animation, while keeping the resulting animation as believable as possible. Using a single audio voice track or live microphone input, the implemented program extracts distinguishing features from the audio signal...

Haaser, Christina Marie

2012-06-07T23:59:59.000Z

315

Time domain analysis of a gyrotron traveling wave amplifier with misaligned electron beam  

SciTech Connect (OSTI)

This article develops a time-domain theory to study the beam-wave interaction in gyrotron traveling wave amplifier (gyro-TWA) with a misaligned electron beam. The effects of beam misalignment on the TE{sub 01} mode gyro-TWA operating at the fundamental are discussed. Numerical results show that the effect of misalignment is less obvious when the input power is larger, and the influences of misalignment on the stable gain and the stable time are basically opposite.

Wang, Qiushi, E-mail: qiushiwork@gmail.com; Peng, Shuyuan [Institute of Electronics, Chinese Academy of Sciences, P.O. Box 2652, Beijing 100080 (China); University of Chinese Academy of Sciences, Beijing 100039 (China); Luo, Jirun [Institute of Electronics, Chinese Academy of Sciences, P.O. Box 2652, Beijing 100080 (China)

2014-08-15T23:59:59.000Z

316

Indian Ocean surface circulations and their connection to Indian Ocean dipole, identified from Ocean Surface Currents Analysis Real Time (OSCAR) data .  

E-Print Network [OSTI]

??Ocean surface circulation is an essential component of the world climate system. In this study, the Ocean Surface Currents Analysis - Real Time (OSCAR) data,… (more)

Rana, Haris Sarwar

2008-01-01T23:59:59.000Z

317

On the definition and design-time analysis of process performance indicators  

Science Journals Connector (OSTI)

A key aspect in any process-oriented organisation is the evaluation of process performance for the achievement of its strategic and operational goals. Process Performance Indicators (PPIs) are a key asset to carry out this evaluation, and, therefore, ... Keywords: Automated analysis, Business process management, PPINOT, Process performance indicators, Process performance measurement

Adela Del-RíO-Ortega; Manuel Resinas; Cristina Cabanillas; Antonio Ruiz-CortéS

2013-06-01T23:59:59.000Z

318

Physics for Everyone Lecture Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physics for Everyone lecture series A non-technical lecture series about Fermilab science and culture Talks take place on Wednesdays each month from 12:30-1:30 p.m. in the...

319

Performance Analysis of a New Ultrasound Axial Strain Time Constant Estimation  

E-Print Network [OSTI]

elastographic time constant (TC) estimator, which is based on the use of the Least Square Error (LSE) curve-fitting method and the Levenberg-Marquardt (LM) optimization rule as applied to noisy elastographic data obtained from a tissue under creep compression...

Nair, Sanjay P.

2011-08-08T23:59:59.000Z

320

Speci cation and Analysis of Real-Time Systems in Statecharts  

E-Print Network [OSTI]

,hshongg@salmosa.kaist.ac.kr Abstract Increased use of software in controlling safety-critical systems pro- duced an urgent need;1 Introduction Software controlling safety-critical real-time systems has already become a part of our society on software to control the amount of radiation to deliver for cancer therapy and to monitor various vital

Note: This page contains sample records for the topic "time series analysis" 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

Schedulability Analysis for Fixed Priority Real-Time Systems with Energy-Harvesting  

E-Print Network [OSTI]

and stored in the battery. Sources of energy include ambient vibrations (piezoelectric effect), thermal unit or battery. The set of real-time tasks is decomposed into two different types of task depending harvesting, the energy needed for task execution is supplied by the storage unit (i.e. a battery or capacitor

Paris-Sud XI, Université de

322

Analysis of time-resolved argon line spectra from OMEGA direct-drive implosions  

SciTech Connect (OSTI)

We discuss the observation and data analysis of argon K-shell line spectra from argon-doped deuterium-filled OMEGA direct-drive implosion cores based on data recorded with two streaked crystal spectrometers. The targets were 870 {mu}m in diameter, 27 {mu}m wall thickness plastic shells filled with 20 atm of deuterium gas, and a tracer amount of argon for diagnostic purposes. The argon K-shell line spectrum is primarily emitted at the collapse of the implosion and its analysis provides a spectroscopic diagnostic of the core implosion conditions. The observed spectra includes the He{alpha}, Ly{alpha}, He{beta}, He{gamma}, Ly{beta}, and Ly{gamma} line emissions and their associated He- and Li-like satellites thus covering a broad photon energy range from 3100 to 4200 eV with a spectral resolution power of approximately 500. The data analysis relies on detailed atomic and spectral models that take into account nonequilibrium collisional-radiative atomic kinetics, Stark-broadened line shapes, and radiation transport calculations.

Florido, R.; Nagayama, T.; Mancini, R. C. [Department of Physics, University of Nevada, Reno, Nevada 89557 (United States); Tommasini, R. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Delettrez, J. A.; Regan, S. P.; Smalyuk, V. A. [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States); Rodriguez, R.; Gil, J. M. [Departamento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria (Spain)

2008-10-15T23:59:59.000Z

323

New frac analysis uses real-time information to lower costs, raise  

SciTech Connect (OSTI)

Evolving hydraulic fracturing technology during the past 10 years has led to reduced costs, improved production and increased cash flow. This report describes several critical aspects in hydraulic fracturing including mechanisms, approaches in treatment quality control procedures and stress profile development, and finally, it is shown how the mechanisms or processes can be addressed and improved through advanced, real-time hydraulic fracture treatment evaluation and execution.

Aud, W.W.; Middlebrook, M.L. [Integrated petroleum Technologies Inc., Denver, CO (United States)

1995-08-01T23:59:59.000Z

324

Data series subtraction with unknown and unmodeled background noise  

E-Print Network [OSTI]

LISA Pathfinder (LPF), ESA's precursor mission to a gravitational wave observatory, will measure the degree to which two test-masses can be put into free-fall, aiming to demonstrate a residual relative acceleration with a power spectral density (PSD) below 30 fm/s$^2$/Hz$^{1/2}$ around 1 mHz. In LPF data analysis, the measured relative acceleration data series must be fit to other various measured time series data. This fitting is required in different experiments, from system identification of the test mass and satellite dynamics to the subtraction of noise contributions from measured known disturbances. In all cases, the background noise, described by the PSD of the fit residuals, is expected to be coloured, requiring that we perform such fits in the frequency domain. This PSD is unknown {\\it a priori}, and a high accuracy estimate of this residual acceleration noise is an essential output of our analysis. In this paper we present a fitting method based on Bayesian parameter estimation with an unknown frequency-dependent background noise. The method uses noise marginalisation in connection with averaged Welch's periodograms to achieve unbiased parameter estimation, together with a consistent, non-parametric estimate of the residual PSD. Additionally, we find that the method is equivalent to some implementations of iteratively re-weighted least-squares fitting. We have tested the method both on simulated data of known PSD, and to analyze differential acceleration from several experiments with the LISA Pathfinder end-to-end mission simulator.

Stefano Vitale; Giuseppe Congedo; Rita Dolesi; Valerio Ferroni; Mauro Hueller; Daniele Vetrugno; William Joseph Weber; Heather Audley; Karsten Danzmann; Ingo Diepholz; Martin Hewitson; Natalia Korsakova; Luigi Ferraioli; Ferran Gibert; Nikolaos Karnesis; Miquel Nofrarias; Henri Inchauspe; Eric Plagnol; Oliver Jennrich; Paul W. McNamara; Michele Armano; James Ira Thorpe; Peter Wass

2014-04-18T23:59:59.000Z

325

Method and system for real-time analysis of biosensor data  

DOE Patents [OSTI]

A method of biosensor-based detection of toxins includes the steps of providing a fluid to be analyzed having a plurality of photosynthetic organisms therein, wherein chemical, biological or radiological agents alter a nominal photosynthetic activity of the photosynthetic organisms. At a first time a measured photosynthetic activity curve is obtained from the photosynthetic organisms. The measured curve is automatically compared to a reference photosynthetic activity curve to determine differences therebetween. The presence of the chemical, biological or radiological agents, or precursors thereof, are then identified if present in the fluid using the differences.

Greenbaum, Elias; Rodriguez, Jr., Miguel

2014-08-19T23:59:59.000Z

326

Solar glare hazard analysis tool on account of determined points of time  

DOE Patents [OSTI]

Technologies pertaining to determining when glare will be perceived by a hypothetical observer from a glare source and the intensity of glare that will be perceived by the hypothetical observer from the glare source are described herein. A first location of a potential source of solar glare is received, and a second location of the hypothetical observer is received. Based upon such locations, including respective elevations, and known positions of the sun over time, a determination as to when the hypothetical observer will perceive glare from the potential source of solar glare is made. Subsequently, an amount of irradiance entering the eye of the hypothetical observer is calculated to assess potential ocular hazards.

Ho, Clifford K; Sims, Cianan Alexander

2014-09-23T23:59:59.000Z

327

Brookhaven Lecture Series | Home  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Next Brookhaven Lecture Next Brookhaven Lecture JAN 22 Wednesday Brookhaven Lecture "491st Brookhaven Lecture: Juergen Thieme of Photon Sciences Directorate" Presented by Juergen Thieme, Brookhaven Lab's Photon Sciences Directorate 4 pm, Berkner Hall Auditorium Wednesday, January 22, 2014, 4:00 pm Hosted by: Allen Orville Refreshments will be served before and after the lecture. Brookhaven Lectures are free and open to the Public. Visitors to the Laboratory age 16 and older must bring photo ID. About the Brookhaven Lecture Series Gertrude Scharff-Goldhaber Gertrude Scharff-Goldhaber The Brookhaven Lectures, held by and for the Brookhaven staff, are meant to provide an intellectual meeting ground for all scientists of the Laboratory. In this role they serve a double purpose: they are to acquaint

328

Continuous time random walk analysis of solute transport in fractured porous media  

SciTech Connect (OSTI)

The objective of this work is to discuss solute transport phenomena in fractured porous media, where the macroscopic transport of contaminants in the highly permeable interconnected fractures can be strongly affected by solute exchange with the porous rock matrix. We are interested in a wide range of rock types, with matrix hydraulic conductivities varying from almost impermeable (e.g., granites) to somewhat permeable (e.g., porous sandstones). In the first case, molecular diffusion is the only transport process causing the transfer of contaminants between the fractures and the matrix blocks. In the second case, additional solute transfer occurs as a result of a combination of advective and dispersive transport mechanisms, with considerable impact on the macroscopic transport behavior. We start our study by conducting numerical tracer experiments employing a discrete (microscopic) representation of fractures and matrix. Using the discrete simulations as a surrogate for the 'correct' transport behavior, we then evaluate the accuracy of macroscopic (continuum) approaches in comparison with the discrete results. However, instead of using dual-continuum models, which are quite often used to account for this type of heterogeneity, we develop a macroscopic model based on the Continuous Time Random Walk (CTRW) framework, which characterizes the interaction between the fractured and porous rock domains by using a probability distribution function of residence times. A parametric study of how CTRW parameters evolve is presented, describing transport as a function of the hydraulic conductivity ratio between fractured and porous domains.

Cortis, Andrea; Cortis, Andrea; Birkholzer, Jens

2008-06-01T23:59:59.000Z

329

Using Fourier Series to Model Hourly Energy Use in Commercial Buildings  

E-Print Network [OSTI]

Fourier series analysis is eminently suitable for modeling strongly periodic data. Weather independent energy use such as lighting and equipment load in commercial buildings is strongly periodic and is thus appropriate for Fourier series treatment...

Dhar, A.; Reddy, T. A.; Claridge, D. E.

1993-01-01T23:59:59.000Z

330

Advances in Adaptive Data Analysis Vol. 2, No. 4 (2010) 521543  

E-Print Network [OSTI]

, for example, Huang and Attoh- Okine, 2005 and Huang and Shen, 1999]. HHT has initiated a brand new approach]. Additionally, the original time series analysis method has also been extended to image and multi

331

Instrument Series: Microscopy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Quanta 3D FEG Quanta 3D FEG This instrument is now available in EMSL's Radiochemistry Annex. The Quanta 3D FEG is the most versatile high-resolution, low vacuum SEM/FIB for 2D and 3D material characterization and analysis. Featuring three imaging modes - high vacuum, low vacuum and ESEM - it accommodates the widest range of samples of any SEM system. The Quanta 3D FEG's novel, field-emission electron source delivers clear and sharp electron imaging and increased electron beam current enhances EDS and EBSP analysis. This system also offers the capability for in situ study of the dynamic behavior of materials at different humidity levels (up to 100% RH) and temperatures (up to 1500 °C). Quanta 3D FEG's unprecedented high- current FIB enables fast material removal.

332

Impact of Interface Recombination on Time Resolved Photoluminescence (TRPL) Decays in CdTe Solar Cells (Numerical Simulation Analysis): Preprint  

SciTech Connect (OSTI)

Using Sentaurus Device Software, we analyze how bulk and interface recombination affect time-resolved photoluminescence (TRPL) decays in CdTe solar cells. This modeling analysis could improve the interpretation of TRPL data and increase the possibility of rapid defect characterization in thin-film solar cells. By illuminating the samples with photons of two different wavelengths, we try to deduce the spatial origin of the dominant recombination loss. Shorter-wavelength photons will be more affected by the interface recombination and drift compared to the longer ones. Using the two-wavelength TRPL characterization method, it may be possible to determine whether a specific change in deposition process has affected the properties of interface or the bulk of the absorber.

Kanevce, A.; Kuciauskas, D.; Gessert, T. A.; Levi, D. H.; Albin, D. S.

2012-06-01T23:59:59.000Z

333

Impact of Interface Recombination on Time Resolved Photoluminescence Decays (TRPL) in CdTe Solar Cells (Numerical Simulation Analysis) (Poster)  

SciTech Connect (OSTI)

Using Sentaurus Device Software, we analyze how bulk and interface recombination affect time-resolved photoluminescence (TRPL) decays in CdTe solar cells. This modeling analysis could improve the interpretation of TRPL data and increase the possibility of rapid defect characterization in thin-film solar cells. By illuminating the samples with photons of two different wavelengths, we try to deduce the spatial origin of the dominant recombination loss. Shorter-wavelength photons will be more affected by the interface recombination and drift compared to the longer ones. Using the two-wavelength TRPL characterization method, it may be possible to determine whether a specific change in deposition process has affected the properties of interface or the bulk of the absorber.

Kanevce, A.; Kuciauskas, D.; Gessert, T. A.; Levi, D. H.; Albin, D. S.

2012-06-01T23:59:59.000Z

334

Prediction and uncertainty of Hurricane Sandy (2012) explored through a real-time cloud-permitting ensemble analysis and forecast system  

E-Print Network [OSTI]

- eral days prior to landfall of Hurricane Sandy (2012) are assessed. The performance of the track-permitting ensemble analysis and forecast system assimilating airborne Doppler radar observations Erin B. Munsell1 University (PSU) real-time convection-permitting hurricane analysis and forecasting system (WRF

335

Taylor series based computations and MATLAB ODE solvers comparisons  

Science Journals Connector (OSTI)

The paper is a part of student cooperation in AKTION project (Austria-Czech). Taylor series method for solving differential equations represents a non-traditional way of a numerical solution. Even though this method is not much preferred in the literature experimental calculations done at the Department of Intelligent Systems of the Faculty of Information Technology of TU Brno have verified that the accuracy and stability of the Taylor series method exceeds the currently used algorithms for numerically solving differential equations. The paper deals with possibilities of numerical solution of Initial Value Problems of Ordinary Differential Equations (ODEs) - using the Taylor series method with automatic computation of higher Taylor series terms. The explicit and implicit scheme of Taylor series method is compared with numerical solvers implemented in MATLAB software [1]. The computation time and accuracy of our approach are compared with that of MATLAB ode solvers on a set of ODEs test examples [2].

Václav Šátek; Ji?í Kunovský; Filip Kocina; Jan Chaloupka

2013-01-01T23:59:59.000Z

336

Fermilab Arts & Lecture Series Tickets  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ticket Information Ticket Information On-Line Tickets On-Line ticketing is now available! Click here to be connected to our secure on-line ticketing site. Please note that on-line ticketing for any particular event closes down the Friday prior to the event at noon. For example, a Friday night lecture has on-line sales ending at noon; on-line sales for a given Saturday night Art Series event will end at noon the Friday prior; and sales for a Sunday afternoon Gallery Chamber Series event will end at noon the Friday prior. Please present an ID to pick up student tickets. Telephone For information and tickets you may also call 630-840-ARTS (630-840-2787), or Fax to (630) 840-5501. An answering machine will take your confidential message during times that the box office manager is not available.

337

Energy Is Everywhere Webinar Series  

Broader source: Energy.gov [DOE]

The U.S. Department of Housing and Urban Development (HUD) and two of its Federal partners, the U.S. Departments of Energy and Education, launched this series of webinars entitled “Energy Is...

338

Solar Permitting & Inspection Webinar Series  

Office of Energy Efficiency and Renewable Energy (EERE)

ICLEI Local Governments for Sustainability U.S.A. and the Interstate Renewable Energy Council, Inc. (IREC) present a series of three webinars on Solar Permitting & Inspection. As part of the U...

339

Castle series, 1954. Technical report  

SciTech Connect (OSTI)

CASTLE was an atmospheric nuclear weapons test series held in the Marshall Islands at Enewetak and Bikini atolls in 1954. This is a report of DOD peronnel in CASTLE with an emphasis on operations and radiological safety.

Martin, E.J.; Rowland, R.H.

1982-04-01T23:59:59.000Z

340

Low-rank approximations for large stationary covariance matrices, as used in the Bayesian and generalized-least-squares analysis of pulsar-timing data  

E-Print Network [OSTI]

Many data-analysis problems involve large dense matrices that describe the covariance of stationary noise processes; the computational cost of inverting these matrices, or equivalently of solving linear systems that contain them, is often a practical limit for the analysis. We describe two general, practical, and accurate methods to approximate stationary covariance matrices as low-rank matrix products featuring carefully chosen spectral components. These methods can be used to greatly accelerate data-analysis methods in many contexts, such as the Bayesian and generalized-least-squares analysis of pulsar-timing residuals.

van Haasteren, Rutger

2014-01-01T23:59:59.000Z

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


341

Low-rank approximations for large stationary covariance matrices, as used in the Bayesian and generalized-least-squares analysis of pulsar-timing data  

E-Print Network [OSTI]

Many data-analysis problems involve large dense matrices that describe the covariance of stationary noise processes; the computational cost of inverting these matrices, or equivalently of solving linear systems that contain them, is often a practical limit for the analysis. We describe two general, practical, and accurate methods to approximate stationary covariance matrices as low-rank matrix products featuring carefully chosen spectral components. These methods can be used to greatly accelerate data-analysis methods in many contexts, such as the Bayesian and generalized-least-squares analysis of pulsar-timing residuals.

Rutger van Haasteren; Michele Vallisneri

2014-07-24T23:59:59.000Z

342

Analysis of meteorological and radiological data for selected fallout episodes  

SciTech Connect (OSTI)

The Weather Service Nuclear Support Office has analyzed the meteorological and radiological data collected for the following atmospheric nuclear tests: TRINITY; EASY of the Tumbler-Snapper series; ANNIE, NANCY, BADGER, SIMON, and HARRY of the Upshot-Knothole series; BEE and ZUCCHINI of the Teapot series; BOLTZMANN and SMOKY of the Plumbbob series; and SMALL BOY of the Dominic II series. These tests were chosen as having the greatest impact on nearby downwind populated locations, contributing approximately 80% of the collective estimated exposure. This report describes the methods of analysis used in deriving fallout-pattern contours and estimated fallout arrival times. Inconsistencies in the radiological data and their resolution are discussed. The methods of estimating fallout arrival times from the meteorological data are described. Comparisons of fallout patterns resulting from these analyses with earlier analyses show insignificant differences in the areas covered or people exposed.

Quinn, V.E. (Weather Service Nuclear Support Office, Las Vegas, NV (USA))

1990-11-01T23:59:59.000Z

343

Macdonald Polynomials and Multivariable Basic Hypergeometric Series  

E-Print Network [OSTI]

We study Macdonald polynomials from a basic hypergeometric series point of view. In particular, we show that the Pieri formula for Macdonald polynomials and its recently discovered inverse, a recursion formula for Macdonald polynomials, both represent multivariable extensions of the terminating very-well-poised 6-phi-5 summation formula. We derive several new related identities including multivariate extensions of Jackson's very-well-poised 8-phi-7 summation. Motivated by our basic hypergeometric analysis, we propose an extension of Macdonald polynomials to Macdonald symmetric functions indexed by partitions with complex parts. These appear to possess nice properties.

Michael J. Schlosser

2007-03-30T23:59:59.000Z

344

Jefferson Lab Science Series - Science Series Video Archive  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science Series Video Archive Science Series Video Archive Couldn't make it to the last Science Series lecture? Did you like a lecture so much that you just had to see it again? Not to worry! Past lectures are now available on demand! The Higgs Boson and Our Life The Higgs Boson and Our Life On July 4th, 2012, the ATLAS and CMS experiments operating at the CERN Large Hadron Collider (LHC) announced the discovery of a new particle compatible with the Higgs boson (hunted for almost 50 years), which is a crucial piece for our understanding of fundamental physics and thus the structure and evolution of the universe. This lecture describes the unprecedented instruments and challenges that have allowed such an accomplishment, the meaning and relevance of this discovery to physics... April 30, 2013

345

Alternative Fuels Data Center: P-Series  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

P-Series to someone by P-Series to someone by E-mail Share Alternative Fuels Data Center: P-Series on Facebook Tweet about Alternative Fuels Data Center: P-Series on Twitter Bookmark Alternative Fuels Data Center: P-Series on Google Bookmark Alternative Fuels Data Center: P-Series on Delicious Rank Alternative Fuels Data Center: P-Series on Digg Find More places to share Alternative Fuels Data Center: P-Series on AddThis.com... More in this section... Biobutanol Drop-In Biofuels Methanol P-Series Renewable Natural Gas xTL Fuels P-Series P-Series fuels are blends of natural gas liquids (pentanes plus), ethanol, and methyltetrahydrofuran (MeTHF), a biomass co-solvent. P-Series fuels are clear, colorless, 89-93 octane, liquid blends used either alone or mixed with gasoline in any proportion in flexible fuel vehicles. These fuels are

346

Fast Algorithms for Mining Co-evolving Time Series  

E-Print Network [OSTI]

stitching and occlusion filling for human motion. In partic- ular, we provide a metric for evaluating-efficient way, which can save a significant percentage of electric power consumption in data centers. #12;vi #12

347

Reconstructing influenza incidence by deconvolution of daily mortality time series  

Science Journals Connector (OSTI)

...On September 28, a 200,000-person Liberty Loan Drive took place on the streets...September 27, one day before the notorious Liberty Loan parade, and seven days before the...research group meetings at which this project was begun. The authors declare no conflict...

Edward Goldstein; Jonathan Dushoff; Junling Ma; Joshua B. Plotkin; David J. D. Earn; Marc Lipsitch

2009-01-01T23:59:59.000Z

348

Irregularity, volatility, risk, and financial market time series  

Science Journals Connector (OSTI)

...dividend payouts, risk, and interest rates...futures and swaps), insurance policies, and...settings when isolated political events, or discretely...destabilization a much greater risk in a significantly fractionized and divisive...quantifying systematic risk. 1 Pincus, S. M...

Steve Pincus; Rudolf E. Kalman

2004-01-01T23:59:59.000Z

349

Time Series of Trace Element Concentrations Calculated from  

E-Print Network [OSTI]

a). A total of 120 samples were collected at sites within the Bay, outside the Golden Gate receives many waste water discharges, especially in areas south of the Dumbarton Bridge, that contain trace

350

Deriving emissions time series from sparse atmospheric mole fractions  

E-Print Network [OSTI]

A growth-based Bayesian inverse method is presented for deriving emissions of atmospheric trace species from temporally sparse measurements of their mole fractions. This work is motivated by many recent studies that have ...

Rigby, Matthew

351

Transient signal detection using GPS position time series  

E-Print Network [OSTI]

Continuously operating Global Positioning System (GPS) networks record station position changes with millimeter-level accuracy and have revealed transient deformations on various spatial and temporal scales. However, the ...

Ji, Kang Hyeun

2011-01-01T23:59:59.000Z

352

Time Series Modeling using Mobile Devices and Broadband Internet  

Science Journals Connector (OSTI)

In this paper we present one application included in the Project @DAN, an AdvANced and high secure mobile platform to support the digital economy, that started on November 2001, and is financed by the EUIST-2001-...

Albert Prat; Ignasi Solé; David Remondo; Daniel Martinez; Josep M. Catot

2002-01-01T23:59:59.000Z

353

Time series models with an EGB2 conditional distribution  

E-Print Network [OSTI]

: Theory and Methods. John Wiley & Sons Ltd. McDonald,. J.B. and White, S. B. (1993) A comparison of some robust, adaptive, and partially adaptive estimators of regression models. Econo- metric Reviews 12, 103-124 McDonald J. B. and Xu, Y. J. (1995) A... generalization of the beta distrib- ution with applications. Journal of Econometrics 66, 133-152. McNeil, A.J., Frey, R. and Embrechts, P. (2005) Quantitative Risk Manage- ment. Princeton: Princeton University Press. Prentice, R. L. (1975) Discrimination among...

Caivano, Michele; Harvey, Andrew

2014-07-09T23:59:59.000Z

354

Learning from Time Series in the Resource-Limited Situations  

E-Print Network [OSTI]

selected) with the utility function (line 7), picks thewith highest utility and pushes it onto T (lines 8 to 10).utility of that candidate by calling C ALCULATE I NFOR - MATION G AIN () (line

Ye, Lexiang

2010-01-01T23:59:59.000Z

355

V-uniform ergodicity of threshold autoregressive nonlinear time series  

E-Print Network [OSTI]

intervals. Each threshold autoregressive model can be embedded in a Markov chain on Rp. For specifics, if we write Xt = (yt,yt-1,...,yt-p+1)prime the TAR(p) model introduced in (1.1) can be expressed as the following: Xt = AiXt-1 +nut, Xt-1 element Ri (1... ... 0 0 0 1 0 ... 0 ... 0 ... 0 0 0 .. ... 1 0 1 CC CC CC CC CC A 3 and nut = xit(1,0,...,0)prime . Since the distribution of Xt given X0,...,Xt-1 depends upon Xt-1 only, Xt is a Markov chain. The transition measure of Xt is singular w.r.t. Lebesgue...

Boucher, Thomas Richard

2004-09-30T23:59:59.000Z

356

Time Series Retrieval: Indexing and Mining Large Datasets  

E-Print Network [OSTI]

to a PAA/DWT benchmark . . . . . . . . . . . . . . . . . .T , of length 16. right) A PAA approximation of T , with 432 MINDIST between PAA and iSAX representations. The lower

Shieh, Jin-Wien

2010-01-01T23:59:59.000Z

357

Stochastic Simulation Methods for Precipitation and Streamflow Time Series  

E-Print Network [OSTI]

One major acknowledged challenge in daily precipitation is the inability to model extreme events in the spectrum of events. These extreme events are rare but may cause large losses. How to realistically simulate extreme behavior of daily...

Li, Chao

2013-04-30T23:59:59.000Z

358

Forecasting Energy Demand Using Fuzzy Seasonal Time Series  

Science Journals Connector (OSTI)

Demand side energy management has become an important issue for energy management. In order to support energy planning and policy decisions forecasting the future demand is very important. Thus, forecasting the f...

?Irem Uçal Sar?; Ba¸sar Öztay¸si

2012-01-01T23:59:59.000Z

359

Real-Time Soil Characterization and Analysis Systems Used at US Department of Energy Closure Sites in Ohio  

SciTech Connect (OSTI)

The Idaho National Engineering and Environmental Laboratory (INEEL) and the Fernald Environmental Management Project (FEMP) have jointly developed a field-deployed analytical system to rapidly scan, characterize, and analyze surface soil contamination. The basic system consists of a sodium iodide (NaI) spectrometer and global positioning system (GPS) hardware. This hardware can be deployed from any of four different platforms depending on the scope of the survey at hand. These platforms range from a large tractor-based unit (the RTRAK) used to survey large, relatively flat areas to a hand-pushed unit where maneuverability is important, to an excavator mounted system used to scan pits and trenches. The mobile sodium iodide concept was initially developed by the FEMP to provide pre-screening analyses for soils contaminated with uranium, thorium, and radium. The initial study is documented in the RTRAK Applicability Study and provides analyses supporting the field usage of the concept. The RTRAK system produced data that required several days of post-processing and analyses to generate an estimation of field coverage and activity levels. The INEEL has provided integrated engineering, computer hardware and software support to greatly streamline the data acquisition and analysis process to the point where real-time activity and coverage maps are available to the field technicians. On-line analyses have been added to automatically convert GPS data to Ohio State-Plane coordinates, examine and correct collected spectra for energy calibration drifts common to NaI spectrometers, and strip spectra in regions of interest to provide moisture corrected activity levels for total uranium, thorium-232, and radium-226. Additionally, the software provides a number of checks and alarms to alert operators that a hand-examination of spectral data in a particular area may be required. The FEMP has estimated that this technology has produced projected site savings in excess of $34M through FY 2006. Additionally, the INEEL has applied this real-time concept to develop an in-situ platform to detect plutonium-238 in contaminated soils to the 50 pCi/g level. The heart of this system is a large-area proportional counter that collects spectra in the x-ray region. A prototype system was demonstrated at the Mound Environmental Management Project (MEMP) in October of 2002.

Roybal, L. G.; Carpenter, M. V.; Giles, J. R.; Danahy, R. J.

2003-02-25T23:59:59.000Z

360

Laboratory tests, statistical analysis and correlations for regained permeability and breakthrough time in unconsolidated sands for improved drill-in fluid cleanup practices  

E-Print Network [OSTI]

LABORATORY TESTS) STATISTICAL ANALYSIS AND CORRELATIONS FOR REGAINED PERMEABILITY AND BREAKTHROUGH TIME IN UNCONSOLIDATED SANDS FOR IMPROVED DRILL-IN FLUID CLEANUP PRACTICES A Thesis GERARDO ENRIQUE SERRANO Submitted to the Office of Graduate... AND BREAKTHROUGH TIME IN UNCONSOLIDATED SANDS FOR IMPROVED DRILL-IN FLUID CLEANUP PRACTICES A Thesis by GERARDO ENRIQUE SERRANO Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved...

Serrano, Gerardo Enrique

2012-06-07T23:59:59.000Z

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


361

Output-Only Modal Analysis of Linear Time Periodic Systems with Application to Wind Turbine Simulation Data  

Science Journals Connector (OSTI)

Many important systems, such as turbomachinery, helicopters and wind turbines, must be modeled with linear time ... predict resonance phenomena. Time periodic effects in wind turbines might arise due to stratific...

Matthew S. Allen; Michael W. Sracic…

2011-01-01T23:59:59.000Z

362

Residential Customer Enrollment in Time-based Rate and Enabling Technology Programs: Smart Grid Investment Grant Consumer Behavior Study Analysis  

E-Print Network [OSTI]

Time-based Rate and Enabling Technology Programs: Smart GridEnvironmental Energy Technologies Division May 2013 The workTime-based Rate and Enabling Technology Programs: Smart Grid

Todd, Annika

2014-01-01T23:59:59.000Z

363

Graduate School Grant Workshop Series  

E-Print Network [OSTI]

Graduate School Grant Workshop Series Fall 2012 Quantitative Social Sciences #12;Overview Brief Review from Intro Workshop Goals for This Workshop Steps to Successful Grant Writing The "Writing" Part of Grant Writing Climate for Funding of Social Sciences Research Resources Tips Next Steps #12

Omiecinski, Curtis

364

2013-2014Series Engineering  

E-Print Network [OSTI]

.................................................................................... 4 EE 101 Creativity and Design in Electrical and Computer Engineering or CS 100 The Computer Science2013-2014Series College of Engineering University of Kentucky is accredited by the Southern of Kentucky. ComputerEngineering Computer engineering involves modeling, design, implementation, testing

Hayes, Jane E.

365

2012-2013 Series Engineering  

E-Print Network [OSTI]

.................................................................................... 4 EE 101 Creativity and Design in Electrical and Computer Engineering or CS 100 The Computer Science2012-2013 Series College of Engineering University of Kentucky is accredited by the Southern of Kentucky. ComputerEngineering Computer engineering involves modeling, design, implementation, testing

Hayes, Jane E.

366

2014-2015Series Engineering  

E-Print Network [OSTI]

................................................................................................... 4 EE 101 Creativity and Design in Electrical and Computer Engineering (fulfills the UK Core Arts2014-2015Series College of Engineering University of Kentucky is accredited by the Southern of Kentucky. ComputerEngineering Computer engineering involves modeling, design, implementation, testing

MacAdam, Keith

367

2014-2015Series Engineering  

E-Print Network [OSTI]

of the College of Engineering. Freshman Year First Semester Hours EE 101 Creativity and Design in Electrical2014-2015Series College of Engineering University of Kentucky is accredited by the Southern of Kentucky. Electrical Engineering The undergraduate electrical engineering degree program seeks to produce

MacAdam, Keith

368

2012-2013 Series Engineering  

E-Print Network [OSTI]

.................................................................................... 4 EE 101 Creativity and Design in Electrical and Computer Engineering or CS 100 The Computer Science2012-2013 Series College of Engineering University of Kentucky is accredited by the Southern://www.sacscoc.org for questions about the accreditation of University of Kentucky. ComputerEngineering Computer engineering

Dietz, Henry G. "Hank"

369

Mechanical Engineering Department Seminar Series  

E-Print Network [OSTI]

Mechanical Engineering Department Seminar Series Rational Mechanics of Viral Shells: Is Continuum Theory a Stretch? William S. Klug Associate Professor, Mechanical & Aerospace Engineering, University-assembly. The capacity of these shells to respond structurally and mechanically to physical and chemical stimuli also

Eustice, Ryan

370

Zeta Functional Analysis  

E-Print Network [OSTI]

We intimate deeper connections between the Riemann zeta and gamma functions than often reported and further derive a new formula for expressing the value of $\\zeta(2n+1)$ in terms of zeta at other fractional points. This paper also establishes and presents new expository notes and perspectives on zeta function theory and functional analysis. In addition, a new fundamental result, in form of a new function called omega $\\Omega(s)$, is introduced to analytic number theory for the first time. This new function together with some of its most fundamental properties and other related identities are here disclosed and presented as a new approach to the analysis of sums of generalised harmonic series, related alternating series and polygamma functions associated with Riemann zeta function.

Michael A. Idowu

2014-10-15T23:59:59.000Z

371

Residential Customer Enrollment in Time-based Rate and Enabling Technology Programs: Smart Grid Investment Grant Consumer Behavior Study Analysis  

E-Print Network [OSTI]

Smart Grid Investment Grant Consumer Behavior Study AnalysisSmart Grid Investment Grant Consumer Behavior StudySmart Grid Investment Grant Consumer Behavior Study

Todd, Annika

2014-01-01T23:59:59.000Z

372

India: Asia-Pacific energy series country report  

SciTech Connect (OSTI)

As part of our continuing assessment of Asia-Pacific energy markets, the Resources Programs of the East-West Center series of country studies that discuss in detail the structure of the energy sector. To date, our reports to the US Department of Energy, Assistant Secretary for International Affairs and Energy Emergencies, have covered Australia, China, India, Indonesia, Japan, Malaysia, New Zealand, Pakistan, the Philippines, Singapore, South Korea, Taiwan, and Thailand. The country studies provide an overview of the economic and political situation in the various countries. We have highlighted petroleum and gas issues in the country studies and have attempted to show the foreign trade implications of oil and gas trade. To the greatest extent possible, we have provided the latest available statistics. Staff members have traveled extensively in-and at times have lived in-the countries under review and have held discussions with senior policymakers in government and industry. Thus, these reports provide not only information but also the latest thinking on energy issues in the various countries. Over the next few years these country studies can be updated and will provide a continuous, long-term source of energy sector analysis for the Asia-Pacific region. This India Asia-Pacific Energy Series Country Report is the follow-on to a study by Victor Lobo, Energy in India: The Oil Sector, which was published by the East-West Center in December 1989. The study focused on the petroleum industry, particularly refining, infrastructure, marketing and distribution, specifications of products, demand structure and pricing. This current study, must be seen as a supplement to our 1989 study and, as such, does not cover the petroleum sector in depth.

Gazdar, M.N.

1992-03-01T23:59:59.000Z

373

Argonne CNM: 2011 Colloquium Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 Colloquium Series 1 Colloquium Series 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | Date Title December 21, 2011 "Film Thickness and Elastic Strain Measurements on Silicon-on-Insulator Thin Films," I. Cevdet Noyan, Columbia University, hosted by Jorg Maser Abstract: Silicon-on-insulator (SOI) composites consist of two semiconductor-grade silicon layers bonded to each other via a SiO2 interface. One of these silicon layers is quite thin; it is possible to get thicknesses between 5 and 150 nm. Since this value is much thinner than the extinction distance of X-rays in silicon for commonly used energies, this layer diffracts in the kinematical mode. The second layer is much thicker, around 700 micrometers, and diffracts in the dynamical mode. Both layers can be considered almost perfect, with negligible mosaic structures and no dislocations.

374

Argonne CNM: 2010 Colloquium Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0 Colloquium Series 0 Colloquium Series 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | Date Title November 10, 2010 "Anisotropic Semiconductor Nanocrystal Synthesis and Chemical and Biological Functionalization," Preston T. Snee, University of Illinois - Chicago, hosted by Richard Schaller Abstract: Semiconductor nanocrystals (NCs, or quantum dots) are very bright chromophores that possess significant potential in alternative energy generation and for biological sensing and imaging applications. Our group has made significant advances in the synthesis of rods and multi-pods of near-infrared emitting PbSe NCs through a previously unobserved mechanism. Characterization of anisotropic PbSe NCs show that they have much more robust chemical properties compared to cubic or "dot"-shaped NCs.

375

Argonne CNM: 2013 Colloquium Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 Colloquium Series 3 Colloquium Series 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | Date Title December 18, 2013 "Monodisperse Carbon Nanomaterial Heterostructures," by Mark Hersam, Northwestern University, hosted by Tijana Rajh Abstract: Improvements in carbon nanomaterial monodispersity have yielded corresponding enhancements in the performance of electronic, optoelectronic, sensing, and energy technologies. However, in all of these cases, carbon nanomaterials are just one of many materials employed, suggesting that further device improvements can be achieved by focusing on the integration of disparate nanomaterials into heterostructures with well-defined interfaces. For example, organic self-assembled monolayers on graphene act as effective seeding layers for atomic layer deposited (ALD) dielectrics, resulting in metal-oxide-graphene capacitors with wafer-scale reliability and uniformity comparable to ALD dielectrics on silicon.

376

CERNA WORKING PAPER SERIES Innovation and international technology transfer  

E-Print Network [OSTI]

1 CERNA WORKING PAPER SERIES Innovation and international technology transfer: The case technology transfer: The case of the Chinese photovoltaic industry Arnaud de la Tour, Matthieu Glachant, Yann emphasis on the role of technology transfers and innovation. Our analysis combines a review

Paris-Sud XI, Université de

377

Energy 101 Dialogue Series Downloads  

Broader source: Energy.gov [DOE]

The Energy 101 dialogue series goals are to identify best practices surrounding teaching energy in the post-secondary setting, to amplify those best practices, and to support the creation of a community of practice of energy education experts. The first dialogue concentrated on issues surrounding teaching energy fundamentals in the classroom within the first two years of post-secondary education and featured presentations from energy education subject matter experts and instructors with experience teaching fundamentals of energy courses.

378

Summer Series 2012 - Shashi Buluswar  

ScienceCinema (OSTI)

The last installment of the "Summer Series of Conversations" took place Wednesday, August 1, with guest Shashi Buluswar, the executive director of the LBNL Institute for Globally Transformative Technologies (LIGTT). The Institute seeks to foster the discovery, development and deployment of a generation of low-carbon, affordable technologies that will advance sustainable methods to fight global poverty. The event, was hosted by Public Affairs Head Jeff Miller.

Shashi Buluswar

2013-06-24T23:59:59.000Z

379

Summer Series 2012 - Shashi Buluswar  

SciTech Connect (OSTI)

The last installment of the "Summer Series of Conversations" took place Wednesday, August 1, with guest Shashi Buluswar, the executive director of the LBNL Institute for Globally Transformative Technologies (LIGTT). The Institute seeks to foster the discovery, development and deployment of a generation of low-carbon, affordable technologies that will advance sustainable methods to fight global poverty. The event, was hosted by Public Affairs Head Jeff Miller.

Shashi Buluswar

2012-08-08T23:59:59.000Z

380

Resumming the string perturbation series  

E-Print Network [OSTI]

We use the AdS/CFT correspondence to study the resummation of a perturbative genus expansion appearing in the type II superstring dual of ABJM theory. Although the series is Borel summable, its Borel resummation does not agree with the exact non-perturbative answer due to the presence of complex instantons. The same type of behavior appears in the WKB quantization of the quartic oscillator in Quantum Mechanics, which we analyze in detail as a toy model for the string perturbation series. We conclude that Borel summability is not enough for extracting non-perturbative information, and one has to add explicit non-perturbative effects associated to complex instantons. We also analyze the resummation of the genus expansion for topological string theory on local P1xP1, which is closely related to ABJM theory. In this case, the non-perturbative answer involves membrane instantons computed by the refined topological string, which are crucial to produce a well-defined result. We give evidence that the Borel resummation of the perturbative series requires such a non-perturbative sector.

Alba Grassi; Marcos Marino; Szabolcs Zakany

2014-05-16T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Thermochemical Analysis of U.S. Argonne Premium Coal Samples by Time-Resolved Pyrolysis-Field ionization Mass Spectrometry  

Science Journals Connector (OSTI)

Analytical pyrolysis techniques are widely used for the thermochemical analysis of coals and coal-derived products. During heating, complex mixtures of chemical substances are released from coal by distillatio...

Norbert Simmleit; Hans-Rolf Schulten; Yongseung Yun…

1992-01-01T23:59:59.000Z

382

Memory Efficient Sequence Analysis Using Compressed Data Structures (Metagenomics Informatics Challenges Workshop: 10K Genomes at a Time)  

ScienceCinema (OSTI)

Wellcome Trust Sanger Institute's Jared Simpson on "Memory efficient sequence analysis using compressed data structures" at the Metagenomics Informatics Challenges Workshop held at the DOE JGI on October 12-13, 2011

Simpson, Jared [Wellcome Trust Sanger Institute

2013-01-22T23:59:59.000Z

383

Classification of Code Annotations and Discussion of Compiler-Support for Worst-Case Execution Time Analysis  

E-Print Network [OSTI]

of energy consumption, resource-aware code generation, or re- targetable code generators. Program execution providing explicit sup- port for WCET analysis would have on usage of these code annotations is discussed

384

Langmuir probe measurements in a time-fluctuating-highly ionized non-equilibrium cutting arc: Analysis of the electron retarding part of the time-averaged current-voltage characteristic of the probe  

SciTech Connect (OSTI)

This work describes the application of Langmuir probe diagnostics to the measurement of the electron temperature in a time-fluctuating-highly ionized, non-equilibrium cutting arc. The electron retarding part of the time-averaged current-voltage characteristic of the probe was analysed, assuming that the standard exponential expression describing the electron current to the probe in collision-free plasmas can be applied under the investigated conditions. A procedure is described which allows the determination of the errors introduced in time-averaged probe data due to small-amplitude plasma fluctuations. It was found that the experimental points can be gathered into two well defined groups allowing defining two quite different averaged electron temperature values. In the low-current region the averaged characteristic was not significantly disturbed by the fluctuations and can reliably be used to obtain the actual value of the averaged electron temperature. In particular, an averaged electron temperature of 0.98 ± 0.07 eV (= 11400 ± 800 K) was found for the central core of the arc (30 A) at 3.5 mm downstream from the nozzle exit. This average included not only a time-average over the time fluctuations but also a spatial-average along the probe collecting length. The fitting of the high-current region of the characteristic using such electron temperature value together with the corrections given by the fluctuation analysis showed a relevant departure of local thermal equilibrium in the arc core.

Prevosto, L.; Mancinelli, B. [Grupo de Descargas Eléctricas, Departamento Ing. Electromecánica, Facultad Regional Venado Tuerto (UTN), Laprida 651, Venado Tuerto (2600) Santa Fe (Argentina)] [Grupo de Descargas Eléctricas, Departamento Ing. Electromecánica, Facultad Regional Venado Tuerto (UTN), Laprida 651, Venado Tuerto (2600) Santa Fe (Argentina); Kelly, H. [Grupo de Descargas Eléctricas, Departamento Ing. Electromecánica, Facultad Regional Venado Tuerto (UTN), Laprida 651, Venado Tuerto (2600) Santa Fe (Argentina) [Grupo de Descargas Eléctricas, Departamento Ing. Electromecánica, Facultad Regional Venado Tuerto (UTN), Laprida 651, Venado Tuerto (2600) Santa Fe (Argentina); Instituto de Física del Plasma (CONICET), Departamento de Física, Facultad de Ciencias Exactas y Naturales (UBA) Ciudad Universitaria Pab. I, 1428 Buenos Aires (Argentina)

2013-12-15T23:59:59.000Z

385

E-Print Network 3.0 - analysis process final Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Series Analysis: Univariate and Multivariate Methods (2nd edition, 2006) by William W.S. Wei... series parameters, ARMA models, trend analysis, model identification,...

386

Time-varying autoregressive model for spectral analysis of microseismic experiments and long-period volcanic events  

Science Journals Connector (OSTI)

......parts of the signal. The study of long-term phenomena, such as resonance...operations, carbon capture and storage and waste water disposal, suffers from...experiments, or CO2 injection and storage. Likewise, a better time-frequency......

J. B. Tary; R. H. Herrera; M. van der Baan

2014-01-01T23:59:59.000Z

387

The impact of bimodal distribution in ocean transportation transit time on logistics costs : an empirical & theoretical analysis  

E-Print Network [OSTI]

As ocean shipments have increased alongside globalization, transit time uncertainty has increased as well. This problem was observed to have variable levels of impacts on logistics cost and safety stock levels. This thesis ...

Das, Lita

2013-01-01T23:59:59.000Z

388

MTL ANNUAL RESEARCH REPORT 2014 MTL Seminar Series 217 MTL Seminar Series  

E-Print Network [OSTI]

MTL ANNUAL RESEARCH REPORT 2014 MTL Seminar Series 217 MTL Seminar Series MTL hosts a series. Commercialization of a MEMS Solid Oxide Fuel Cell · April 2, 2014 Zachary J. Lemnios, IBM IBM: Leading the Next Era

Reif, Rafael

389

Department of Electrical and Computer Engineering Fall 2011 Seminar Series  

E-Print Network [OSTI]

transcription requires the understanding of cooperative regulations by TFs and miRNAs, which however haveDepartment of Electrical and Computer Engineering Fall 2011 Seminar Series Seminar Title: Uncover context-specific co-regulations by transcription factors and microRNAs using Bayesian factor model Time

Pal, Ranadip

390

USF College of Marine Science Eminent Scholars Lecture Series  

E-Print Network [OSTI]

USF College of Marine Science Eminent Scholars Lecture Series Frontiers in Marine Science Thursday - April 5, 2012 Time Speaker Title 1:30 pm Dr. Josh Willis Jet Propulsion Laboratory California Institute, 727-553-1130, website: http://www.marine.usf.edu/seminars/esls #12;

Meyers, Steven D.

391

Summing Finite Series?A Hybrid Approach  

Science Journals Connector (OSTI)

......Finite Series-A Hybrid Approach OLIVER ANDERSON AFIMA Department of Management Science, Pennsylvania State...Series--A Hybrid Approach OLIVER ANDERSON, AFIMA Department of Management Science, Pennsylvania State......

OLIVER ANDERSON

1987-01-01T23:59:59.000Z

392

TDS3000C Series Digital Phosphor Oscilloscopes  

E-Print Network [OSTI]

xx TDS3000C Series Digital Phosphor Oscilloscopes ZZZ User Manual *P071230802* 071-2308-02 #12;#12;TDS3000C Series Digital Phosphor Oscilloscopes ZZZ User Manual xx www.tektronix.com 071-2308-02 #12

Kleinfeld, David

393

Earthquake Damage Detection in the Imperial County Services Building III: Analysis of Wave Travel Times via Impulse Response Functions  

E-Print Network [OSTI]

, one such method is explored using strong motion data from the 1979 Imperial Valley Earthquake recorded1 Earthquake Damage Detection in the Imperial County Services Building III: Analysis of Wave Travel in the former Imperial County Services (ICS) Building, severely damaged by this earthquake. Shear wave travel

Southern California, University of

394

Dustbuster: a compact impact-ionization time-of-flight mass spectrometer for in situ analysis of cosmic dust  

E-Print Network [OSTI]

a large target area with a reflectron, simultaneously optimizing mass resolution, particle detection. The resulting ions, with broad energy and angular distributions, are accelerated through a modified reflectron remote sensing, collection and analysis of dust grains that have survived impact on the Earth, capture

Stewart, Sarah T.

395

Jefferson Lab Science Series - The Ultimate Speed  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Higgs Boson and Our Life Higgs Boson and Our Life Previous Video (The Higgs Boson and Our Life) Science Series Video Archive Next Video (What Is CEBAF All About?) What Is CEBAF All About? The Ultimate Speed Dr. William Bertozzi - Massachusetts Institute of Technology Sometime in 1962 In his youth, Dr. William Bertozzi, an MIT professor who has long been a leader in experimental nuclear physics using beams of electrons, carried out an experiment in which he explored the relationship between the velocity of electrons and their kinetic energy by measurements over a range of accelerating voltages between 0.5 MeV and 15 MeV. The kinetic energy is measured using calorimetry and the velocity is measured by time-of-flight. This educational film, made in 1962, documents the experiment and shows

396

Implementation of sub-nanoseconds TDC in FPGA: applications to time-of-flight analysis in muon radiography  

E-Print Network [OSTI]

Time-of-flight (tof) techniques are standard techniques in high energy physics to determine particles propagation directions. Since particles velocities are generally close to c, the speed of light, and detectors typical dimensions at the meter level, the state-of-the-art tof techniques should reach sub-nanosecond timing resolution. Among the various techniques already available, the recently developed ring oscillator TDC ones, implemented in low cost FPGA, feature a very interesting figure of merit since a very good timing performance may be achieved with limited processing ressources. This issue is relevant for applications where unmanned sensors should have the lowest possible power consumption. Actually this article describes in details the application of this kind of tof technique to muon tomography of geological bodies. Muon tomography aims at measuring density variations and absolute densities through the detection of atmospheric muons flux's attenuation, due to the presence of matter. When the measure...

Marteau, J; Gibert, D; Jourde, K; Gardien, S; Girerd, C; Ianigro, J -C

2014-01-01T23:59:59.000Z

397

Optimization of high-order harmonic generation by genetic algorithm and wavelet time-frequency analysis of quantum dipole emission  

E-Print Network [OSTI]

-order har- monic generation ~HHG! of orders as high as 300 has been observed @5,6#, with photon energies in excess of 500 eV. A novel concept of ‘‘intra-atomic’’ phase matching has been recently introduced, allowing the enhancement of the inten- sity of a..., as shown in Fig. 2, the major time domain contributing to the total har- monic intensity is the central part of the laser pulse with significant field intensity ~for example, between 24 to 14 optical cycles!. Beyond this central time regime, the har- monic...

Chu, Xi; Chu, Shih-I

2001-07-13T23:59:59.000Z

398

Rapidly Convergent Series of the Divisors Functions  

E-Print Network [OSTI]

This note gives a few rapidly convergent series representations of the sums of divisors functions. These series have various applications such as exact evaluations of some power series, computing estimates and proving the existence results of some special values of the sums of divisors functions.

N. A. Carella

2014-07-28T23:59:59.000Z

399

Resumming the string perturbation series  

E-Print Network [OSTI]

We use the AdS/CFT correspondence to study the resummation of a perturbative genus expansion appearing in the type II superstring dual of ABJM theory. Although the series is Borel summable, its Borel resummation does not agree with the exact non-perturbative answer due to the presence of complex instantons. The same type of behavior appears in the WKB quantization of the quartic oscillator in Quantum Mechanics, which we analyze in detail as a toy model for the string perturbation series. We conclude that Borel summability is not enough for extracting non-perturbative information, and one has to add explicit non-perturbative effects associated to complex instantons. We also analyze the resummation of the genus expansion for topological string theory on local P1xP1, which is closely related to ABJM theory. In this case, the non-perturbative answer involves membrane instantons computed by the refined topological string, which are crucial to produce a well-defined result. We give evidence that the Borel resummati...

Grassi, Alba; Zakany, Szabolcs

2014-01-01T23:59:59.000Z

400

An analysis of the travel times of S waves to North American stations in the distance range 28° to 82°  

Science Journals Connector (OSTI)

...i o-,.s ~.... ~ ,, ~ ,,/ \\Lt ~ ..... o'~ ', ,' , t / -%, o WWSS stoflons \\ / \\ \\ = CaHech slo'iions 1.6 Fzo. 2. Map of S Residuals for.U.S. Stations. TRAVEL TIMES OF S WAVES 767 l I I I I I I I I I I I i I I x x I...

H. A. Doyle; A. L. Hales

Note: This page contains sample records for the topic "time series analysis" 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

Time-varying autoregressive model for spectral analysis of microseismic experiments and long-period volcanic events  

Science Journals Connector (OSTI)

......than the brittle failure energy corresponding to the...a part of the missing energy. Fluid injection monitoring...applications, such as geothermal operations, carbon capture...limitation. As the needs in energy are growing and climate...and their computational cost. 2 METHODS 2.1 Short-time......

J. B. Tary; R. H. Herrera; M. van der Baan

2014-01-01T23:59:59.000Z

402

Experimental analysis of control loops with different delay times in the supply air system of a radiator test rig  

Science Journals Connector (OSTI)

The test rig of low-temperature hot-water radiator is a typical multi-input multi-output (MIMO) thermal system with large time delay. Aiming at the control of the supply air temperature and the temperature of the environmental chamber in the test rig, the paper carries out the fuzzy control experiments and PI control experiments based on adjusting the electric heater in the supply air system, in which there are two control loops with various delay time. The experiments researched two types of fuzzy control methods which are the basic fuzzy control (BFC), and the self-organizing rules fuzzy control (SORFC) with zero initial control rules. For the control loop of supply air temperature with short delay time, PI control performs better with fast convergence speed and small overshoot than the BFC and the SORFC. The convergence speed of the BFC method is lower than other two control methods. For the control loop of chamber temperature with long delay time, the SORFC has a satisfied control performance with less overshoot and stable error than the BFC and PI control.

Yongpan Chen; Jili Zhang; Zhen Lu; Tianyi Zhao; Hui Liu

2011-01-01T23:59:59.000Z

403

Analysis of Cardiac Micro-Acceleration Signals for the Estimation of Systolic and Diastolic Time Intervals in Cardiac Resynchronization Therapy  

E-Print Network [OSTI]

error and coefficient stability. Models for mitral valve closing, aor- tic valve closing and opening, fitted between CMA features and echo timings, were eval- uated with their correlation coefficient, model instants showed satisfactory results, whereas the estimation of the opening instant of the mitral valve

Boyer, Edmond

404

Direct connection of series self-excited generators and HVDC converters  

SciTech Connect (OSTI)

An alternative and simpler solution is proposed for the direct connection of generators to HVdc converters. The generator exciter windings are connected in series with the output of the HVdc converter and take the place of the conventional smoothing reactor. Existing steady state and time domain simulation programs are modified to represent the behavior of the series direct connection scheme. It is shown that series excitation extends naturally the power transmission capability and permits fast fault clearances.

Arrillaga, J.; Macdonald, S.J.; Watson, N.R.; Watson, S. (Univ. Canterbury, Christchurch (New Zealand))

1993-10-01T23:59:59.000Z

405

Phase Coherence Analysis of Solar Magnetic Activity  

E-Print Network [OSTI]

Over 24 years of synoptic data from the NSO Kitt Peak Vacuum Telescope is used to investigate the coherency and source of the 27-day (synodic) periodicity that is observed over multiple solar cycles in various solar-related time series. A strong 27.03-day period signal, recently reported by Neugebauer et al. (2000), is clearly detected in power spectra of time series from integrated full-disk measurements of the magnetic flux in the 868.8 nm Fe I line and the line equivalent width in the 1083.0 nm He I line. Using spectral analysis of synoptic maps of photospheric magnetic fields, in addition to constructing maps of the surface distribution of activity, we find that the origin of the 27.03-day signal is long-lived complexes of active regions in the northern hemisphere at a latitude of approximately 18 degrees. In addition, using a new time series analysis technique which utilizes the phase variance of a signal, the coherency of the 27.03-day period signal is found to be significant for the past two decades. However, using the past 120 years of the sunspot number time series, the 27.03-day period signal is found to be a short-lived, no longer than two 11-year solar cycles, quasi-stationary signal.

Carl J. Henney; John W. Harvey

2006-12-20T23:59:59.000Z

406

Development of a High Resolution, Real Time, Distribution-Level Metering System and Associated Visualization, Modeling, and Data Analysis Functions  

SciTech Connect (OSTI)

NREL is developing measurement devices and a supporting data collection network specifically targeted at electrical distribution systems to support research in this area. This paper describes the measurement network which is designed to apply real-time and high speed (sub-second) measurement principles to distribution systems that are already common for the transmission level in the form of phasor measurement units and related technologies.

Bank, J.; Hambrick, J.

2013-05-01T23:59:59.000Z

407

Time-Resolved  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Time-Resolved Time-Resolved Time-Resolved Print Of the four fundamental parameters that we use to perceive the physical world (energy, momentum, position, and time) three correspond to the three broad categories of synchrotron experimental measurement techniques: spectroscopy (energy), scattering (momentum), and imaging (position). The fourth parameter-time-can in principle be applied to all the techniques. At the ALS, many experiments can be carried out in real time, with data being recorded from the same sample as it changes over time. Some time-resolved experiments take advantage of the pulsed nature of the ALS's synchrotron radiation, which, like a strobe light, can capture a series of "snapshots" of a process that, when viewed sequentially, show us how a given process evolves over time. Other experiments simply require two pulses: one to "pump" energy into the sample system and a second to probe the system's excited state.

408

Measurement of Holmium Rydberg series through MOT depletion spectroscopy  

E-Print Network [OSTI]

We report measurements of the absolute excitation frequencies of $^{165}$Ho $4f^{11}6sns$ and $4f^{11}6snd$ odd-parity Rydberg series. The states are detected through depletion of a magneto-optical trap via a two-photon excitation scheme. Measurements of 162 Rydberg levels in the range $n=40-101$ yield quantum defects well described by the Rydberg-Ritz formula. We observe a strong perturbation in the $ns$ series around $n=51$ due to an unidentified interloper at 48515.47(4) cm$^{-1}$. From the series convergence, we determine the first ionization potential $E_\\mathrm{IP}=48565.939(4)$ cm$^{-1}$, which is three orders of magnitude more accurate than previous work. This work represents the first time such spectroscopy has been done in Holmium and is an important step towards using Ho atoms for collective encoding of a quantum register.

Hostetter, J; Lawler, J E; Saffman, M

2014-01-01T23:59:59.000Z

409

HANFORD DOUBLE SHELL TANK (DST) THERMAL & SEISMIC PROJECT ESTABLISHMENT OF METHODOLOGY FOR TIME DOMAIN SOIL STRUCTURE INTERACTION ANALYSIS OF HANFORD DST  

SciTech Connect (OSTI)

M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratories (PNNL) to perform seismic analysis of the Hanford Site Double-Shell Tanks (DSTs) in support of a project entitled ''Double-Shell Tank DSV Integrity Project-DST Thermal and Seismic Analyses''. The overall scope of the project is to complete an up-to-date comprehensive analysis of record of the DST System at Hanford in support of Tri-Party Agreement Milestone M-48-14. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). The work statement provided to M&D (PNNL 2003) required that the seismic analysis of the DST assess the impacts of potentially non-conservative assumptions in previous analyses and account for the additional soil mass due to the as-found soil density increase, the effects of material degradation, additional thermal profiles applied to the full structure including the soil-structure response with the footings, the non-rigid (low frequency) response of the tank roof, the asymmetric seismic-induced soil loading, the structural discontinuity between the concrete tank wall and the support footing and the sloshing of the tank waste. The seismic analysis considers the interaction of the tank with the surrounding soil, and the effects of the primary tank contents. The DST and the surrounding soil are modeled as a system of finite elements. The depth and width of the soil incorporated into the analysis model are sufficient to obtain appropriately accurate analytical results. The analyses required to support the work statement differ from previous analysis of the DSTs in that the soil-structure interaction (SSI) model includes several (nonlinear) contact surfaces in the tank structure, and the contained waste must be modeled explicitly in order to capture the fluid-structure interaction behavior between the primary tank and contained waste. Soil-structure interaction analyses are traditionally solved in the frequency domain, but frequency domain analysis is limited to systems with linear responses. The nonlinear character of the coupled SSI model and tank structural model requires that the seismic analysis be solved in the time domain. However, time domain SSI analysis is somewhat nontraditional and requires that the appropriate methodology be developed and demonstrated. Moreover, the analysis of seismically induced fluid-structure interaction between the explicitly modeled waste and the primary tank must be benchmarked against known solutions to simpler problems before being applied to the more complex analysis of the DSTs. The objective of this investigation is to establish the methodology necessary to perform the required SSI analysis of the DSTs in the time domain. Specifically, the analysis establishes the capabilities and limitations of the time domain codes ANSYS and Dytran for performing seismic SSI analysis of the DSTs. The benchmarking of the codes Dytran and ANSYS for performing seismically induced fluid-structure interaction (FSI) between the contained waste and the DST primary tank are documented in Abatt (2006) and Carpenter and Abatt (2006), respectively. The results of those two studies show that both codes have the capability to analyze the fluid-structure interaction behavior of the primary tank and contained waste. As expected, Dytran appears to have more robust capabilities for FSI analysis. The ANSYS model used in that study captures much of the FSI behavior, but does have some limitations for predicting the convective response of the waste and possibly the response of the waste in the knuckle region of the primary tank. While Dytran appears to have somewhat stronger capabilities for the analysis of the FSI behavior in the primary tank, it is more practical for the overall analysis to use ANSYS. Thus, Dytran served the purpose of helping to identify limitations in the ANSYS FSI analysis so that those limitations can be addressed in the structural evaluation of the primary tank. The limitations of ANSYS for predicting the details of the convective

MACKEY, T.C.

2006-03-14T23:59:59.000Z

410

Large-Scale Uncertainty and Error Analysis for Time-dependent Fluid/Structure Interactions in Wind Turbine Applications  

SciTech Connect (OSTI)

The following is the final report covering the entire period of this aforementioned grant, June 1, 2011 - May 31, 2013 for the portion of the effort corresponding to Stanford University (SU). SU has partnered with Sandia National Laboratories (PI: Mike S. Eldred) and Purdue University (PI: Dongbin Xiu) to complete this research project and this final report includes those contributions made by the members of the team at Stanford. Dr. Eldred is continuing his contributions to this project under a no-cost extension and his contributions to the overall effort will be detailed at a later time (once his effort has concluded) on a separate project submitted by Sandia National Laboratories. At Stanford, the team is made up of Profs. Alonso, Iaccarino, and Duraisamy, post-doctoral researcher Vinod Lakshminarayan, and graduate student Santiago Padron. At Sandia National Laboratories, the team includes Michael Eldred, Matt Barone, John Jakeman, and Stefan Domino, and at Purdue University, we have Prof. Dongbin Xiu as our main collaborator. The overall objective of this project was to develop a novel, comprehensive methodology for uncertainty quantification by combining stochastic expansions (nonintrusive polynomial chaos and stochastic collocation), the adjoint approach, and fusion with experimental data to account for aleatory and epistemic uncertainties from random variable, random field, and model form sources. The expected outcomes of this activity were detailed in the proposal and are repeated here to set the stage for the results that we have generated during the time period of execution of this project: 1. The rigorous determination of an error budget comprising numerical errors in physical space and statistical errors in stochastic space and its use for optimal allocation of resources; 2. A considerable increase in efficiency when performing uncertainty quantification with a large number of uncertain variables in complex non-linear multi-physics problems; 3. A solution to the long-time integration problem of spectral chaos approaches; 4. A rigorous methodology to account for aleatory and epistemic uncertainties, to emphasize the most important variables via dimension reduction and dimension-adaptive refinement, and to support fusion with experimental data using Bayesian inference; 5. The application of novel methodologies to time-dependent reliability studies in wind turbine applications including a number of efforts relating to the uncertainty quantification in vertical-axis wind turbine applications. In this report, we summarize all accomplishments in the project (during the time period specified) focusing on advances in UQ algorithms and deployment efforts to the wind turbine application area. Detailed publications in each of these areas have also been completed and are available from the respective conference proceedings and journals as detailed in a later section.

Alonso, Juan J. [Stanford University; Iaccarino, Gianluca [Stanford University

2013-08-25T23:59:59.000Z

411

88 Power Series 8.1 Introduction and Review of Power Series  

E-Print Network [OSTI]

88 Power Series Methods 8.1 Introduction and Review of Power Series In Section 3.3 we saw by inspection, linear equations with variable coefficients generally require the power series techniques - 2xy + n(n + 1)y = 0. In this section we introduce the power series method in its simplest form and

Sikora, Adam S.

412

Fermilab Arts & Lecture Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Arts & Lecture Series 2013-14 Free on-line ticketing now available! Check our web page at fnal.gov/culture A r t S S e r i e S The Congregation Second City: Happily Ever Laughter De Temps Antan Stars of Dance Chicago Jingle Babes: Decking the Halls with Songs and Folly-The Four Bitchin' Babes Dirty Dozen Brass Band Alan Kelly Gang The Fantasticks: Steampunk Version Huun Huur Tu: Throat Singers of Tuva Rhythm Safari: An Interactive World Drumming Event G A L L e r y C h A m b e r S e r i e S Chicago Brass Quintet 50th Anniversary Season Cavatina Duo Rembrandt Chamber Players L e C t u r e S e r i e S Dr. Jeff Lichtman Connectomics: Mapping the Brain Dr. Michael Meyer The Potential for Life on Mars: Past, Present and Future? Dr. James Kakalios The Physics of Superheroes Physics Slam 2013 Dr. Pete Beckman

413

Climate Change Task Force Webinar Series | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Climate Change Task Force Webinar Series Climate Change Task Force Webinar Series The four-part Climate Change Impacts and Indian Country webinar series provided tribal leaders an...

414

DOE Tribal Renewable Energy Webinar Series 2014 | Department...  

Broader source: Energy.gov (indexed) [DOE]

Tribal Renewable Energy Webinar Series 2014 DOE Tribal Renewable Energy Webinar Series 2014 2014 webinar series flyer More Documents & Publications Community- and Facility-Scale...

415

Real-time quadrupole mass spectrometer analysis of gas in boreholefluid samples acquired using the U-Tube sampling methodology  

SciTech Connect (OSTI)

Sampling of fluids in deep boreholes is challenging becauseof the necessity to minimize external contamination and maintain sampleintegrity during recovery. The U-tube sampling methodology was developedto collect large volume, multiphase samples at in situ pressures. As apermanent or semi-permanent installation, the U-tube can be used forrapidly acquiring multiple samples or it may be installed for long-termmonitoring applications. The U-tube was first deployed in Liberty County,TX to monitor crosswell CO2 injection as part of the Frio CO2sequestration experiment. Analysis of gases (dissolved or separate phase)was performed in the field using a quadrupole mass spectrometer, whichserved as the basis for determining the arrival of the CO2 plume. Thepresence of oxygen and argon in elevated concentrations, along withreduced methane concentration, indicate sample alteration caused by theintroduction of surface fluids during borehole completion. Despiteproducing the well to eliminate non-native fluids, measurementsdemonstrate that contamination persists until the immiscible CO2injection swept formation fluid into the observationwellbore.

Freifeld, Barry M.; Trautz, Robert C.

2006-01-11T23:59:59.000Z

416

UNEP-Risoe-Economics of GHG Limitations: Country Study Series | Open Energy  

Open Energy Info (EERE)

Jump to: navigation, search Jump to: navigation, search Name UNEP-Risoe - Economics of GHG Limitations: Country Study Series Agency/Company /Organization UNEP-Risoe Centre Sector Energy, Land Topics Policies/deployment programs, Pathways analysis, Background analysis, Resource assessment Website http://www.uneprisoe.org/Econo References Economics of Greenhouse Gas Limitations[1] Country study series: Argentina, Ecuador, Estonia, Hungary, Indonesia, Mauritius, Senegal, Vietnam Parallel country studies: Botswana, Tanzania, Zambia Regional Studies: Andean Region, Southern African Development Community (SADC) References ↑ "Economics of Greenhouse Gas Limitations" Retrieved from "http://en.openei.org/w/index.php?title=UNEP-Risoe-Economics_of_GHG_Limitations:_Country_Study_Series&oldid=377226"

417

Transportation Energy Futures Series: Projected Biomass Utilization...  

Office of Scientific and Technical Information (OSTI)

Projected Biomass Utilization for Fuels and Power in a Mature Market TRANSPORTATION ENERGY FUTURES SERIES: Projected Biomass Utilization for Fuels and Power in a Mature Market A...

418

Downhole delay assembly for blasting with series delay  

DOE Patents [OSTI]

A downhole delay assembly is provided which can be placed into a blasthole for initiation of explosive in the blasthole. The downhole delay assembly includes at least two detonating time delay devices in series in order to effect a time delay of longer than about 200 milliseconds in a round of explosions. The downhole delay assembly provides a protective housing to prevent detonation of explosive in the blasthole in response to the detonation of the first detonating time delay device. There is further provided a connection between the first and second time delay devices. The connection is responsive to the detonation of the first detonating time delay device and initiates the second detonating time delay device. A plurality of such downhole delay assemblies are placed downhole in unfragmented formation and are initiated simultaneously for providing a round of explosive expansions. The explosive expansions can be used to form an in situ oil shale retort containing a fragmented permeable mass of formation particles.

Ricketts, Thomas E. (Grand Junction, CO)

1982-01-01T23:59:59.000Z

419

Time-dependent restricted-active-space self-consistent-field theory for laser-driven many-electron dynamics. II. Extended formulation and numerical analysis  

E-Print Network [OSTI]

The time-dependent restricted-active-space self-consistent-field (TD-RASSCF) method is formulated based on the TD variational principle. In analogy with the configuration-interaction singles (CIS), singles-and-doubles (CISD), singles-doubles-and-triples (CISDT) methods in quantum chemistry, the TD-RASSCF-S, -SD, and -SDT methods are introduced as extensions of the TD-RASSCF dou- bles (-D) method [Phys. Rev. A 87, 062511 (2013)]. Based on an analysis of the numerical cost and test calculations for one-dimensional (1D) models of atomic helium, beryllium, and carbon, it is shown that the TD-RASSCF-S and -D methods are computationally feasible for systems with many electrons and more accurate than the TD Hartree-Fock (TDHF) and TDCIS methods. In addition to the discussion of methodology, an analysis of electron dynamics in the high-order harmonic generation (HHG) process is presented. For the 1D beryllium atom, a state-resolved analysis of the HHG spectrum based on the time-independent HF orbitals shows that while only single-orbital excitations are needed in the region below the cutoff, single- and double-orbital excitations are es- sential beyond, where accordingly the single-active-electron (SAE) approximation and the TDCIS method break down. On the other hand, the TD-RASSCF-S and -D methods accurately describe the multi-orbital excitation processes throughout the entire region of the HHG spectrum. For the 1D carbon atom, our calculations show that multi-orbital excitations are essential in the HHG process even below the cutoff. Hence, in this test system a very accurate treatment of electron correlation is required. The TD-RASSCF-S and -D approaches meet this demand, while the SAE approximation and the TDCIS method are inadequate.

Haruhide Miyagi; Lars Bojer Madsen

2014-05-21T23:59:59.000Z

420

World Series Baseball 2k1  

Science Journals Connector (OSTI)

From the Publisher:The great American pastime just got a shot in the arm! World Series Baseball 2K1 for the Sega Dreamcast (based on the successful arcade game World Series Baseball 99) promises to be the most immersive baseball game ever ...

Mark Cohen; David Chong; Patrick Mauro

2000-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

On site relay transient testing for a series compensation upgrade  

SciTech Connect (OSTI)

This paper describes tests on the relays on a long 500kV ac line carried out on site using the RTDS (Real Time Digital Simulator) of the Manitoba HVDC Research Centre. The purpose of the tests was to examine the relay behavior when series compensation is inserted in the line in 1993. New settings for the relays have been found which will give adequate cover for all faults although some faults will be entirely dependent on the communication link for short clearance times.

McLaren, P.G.; Kuffel, R.; Giesbrecht, J.; Keerthipala, W. (Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada)); Castro, A.; Fedirchuk, D.; Innes, S. (Manitoba Hydro, Winnipeg, Manitoba (Canada)); Mustaphi, K. (Northern States Power, Minneapolis, MN (United States)); Sletten, K. (Minnesota Power, Duluth, MN (United States))

1994-07-01T23:59:59.000Z

422

A Proposed Data Fusion Architecture for Micro-Zone Analysis and Data Mining  

SciTech Connect (OSTI)

Data Fusion requires the ability to combine or “fuse” date from multiple data sources. Time Series Analysis is a data mining technique used to predict future values from a data set based upon past values. Unlike other data mining techniques, however, Time Series places special emphasis on periodicity and how seasonal and other time-based factors tend to affect trends over time. One of the difficulties encountered in developing generic time series techniques is the wide variability of the data sets available for analysis. This presents challenges all the way from the data gathering stage to results presentation. This paper presents an architecture designed and used to facilitate the collection of disparate data sets well suited to Time Series analysis as well as other predictive data mining techniques. Results show this architecture provides a flexible, dynamic framework for the capture and storage of a myriad of dissimilar data sets and can serve as a foundation from which to build a complete data fusion architecture.

Kevin McCarthy; Milos Manic

2012-08-01T23:59:59.000Z

423

Instrument Series: Spectroscopy and Diffraction XPS Imaging  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

XPS Imaging XPS Imaging The X-ray photoelectron spectroscopy (XPS) imaging system provides fast, quantitative, real-time parallel imaging with highest resolution spectroscopy at all analysis areas. In addition, the system is equipped with temperature programmed desorption (TPD), ultraviolet photoelectron spectroscopy (UPS), ion scattering spectroscopy (ISS), a cluster/Ar + ion gun, and a five-axis automated stage with variable temperature sample environment at the analysis chamber. The system is also integrated with a radial distribution chamber (RDC), a full-size glove box, and a cold-stage at the sample introduction for air-sensitive, liquid-semisolid, biological and environmental sample transfers. In addition, the RDC has a simple sample transfer mechanism to the

424

Accelerated Failure Time Regression Model with a Regression Model of Surviving Fraction: An Application to the Analysis of RPermanent EmploymentS in Japan  

E-Print Network [OSTI]

other hand, for any given accelerated failure-time model, weconsidered improvements of accelerated failure-time models.Although representative accelerated failure-time models can

Kazuo Yamaguchi

2011-01-01T23:59:59.000Z

425

Argonne CNM: 2005 Seminar Series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 5 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 Dec. 8, 2005 "Ultrafast spectroscopy of single-walled carbon nanotubes," Libai Huang-Stevenson, University of Rochester, hosted by Gary Wiederrecht Abstract: The optical and electronic properties of single-walled carbon nanotubes (SWNTs) were studied by ultrafast spectroscopy. The photoexcited carriers in isolated SWNTs relaxed through many channels with decay time ranging from subpicosecond to over 100 ps. The magnitude of the longest-lived component in the ultrafast signal exhibited strong resonance dependence, thus suggesting that this lifetime corresponds to the band-edge relaxation time. Excitons are expected to play an important role in reduced dimension materials. Exciton effects in SWNTs were investigated through Auger recombination. Quantized Auger recombination was observed, and Auger lifetimes for two and three e-h pair states were determined. Auger recombination in SWNTs is extremely fast, with lifetimes of only a few picoseconds for SWNTs excited with two and three e-h pairs. Experimental results conclusively show that Auger recombination in SWNTs is due to interaction between one-dimensional excitons and occurs as a two-particle process; a one-electron picture cannot explain our data. Thus, this provides experimental evidence of discrete one-dimensional exciton-excited states in SWNTs.

426

UNEP-Risoe-Economics of GHG Limitations: Country Study Series | Open Energy  

Open Energy Info (EERE)

(Redirected from UNEP-Risoe - Economics of GHG Limitations: Country Study (Redirected from UNEP-Risoe - Economics of GHG Limitations: Country Study Series) Jump to: navigation, search Name UNEP-Risoe - Economics of GHG Limitations: Country Study Series Agency/Company /Organization UNEP-Risoe Centre Sector Energy, Land Topics Policies/deployment programs, Pathways analysis, Background analysis, Resource assessment Website http://www.uneprisoe.org/Econo References Economics of Greenhouse Gas Limitations[1] Country study series: Argentina, Ecuador, Estonia, Hungary, Indonesia, Mauritius, Senegal, Vietnam Parallel country studies: Botswana, Tanzania, Zambia Regional Studies: Andean Region, Southern African Development Community (SADC) References ↑ "Economics of Greenhouse Gas Limitations" Retrieved from "http://en.openei.org/w/index.php?title=UNEP-Risoe-Economics_of_GHG_Limitations:_Country_Study_Series&oldid=377226"

427

Project Rover: Main Series of Nuclear-Rocket Engines - NUCLEAR ROCKETS: To  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Project Rover: Main Series of Nuclear-Rocket Engines Project Rover: Main Series of Nuclear-Rocket Engines Kiwi-A Named after the large, flightless bird, Kiwi was the first phase of Project Rover. Kiwi consisted of eight reactors that scientists tested between 1959 and 1964. The first reactor, dubbed Kiwi-A, was fired for the first (and only) time on July 1, 1959, at Jackass Flats in the Nevada Test Site (now the Nevada National Security Site). Kiwi-B The Kiwi-B series increased power by ten-fold while maintaining the same size of the Kiwi-A series. The Kiwi-B reactors experienced a problem similar to Kiwi-A: Internal vibrations caused by dynamic flow instability fractured portions of the fuel elements. Scientists resolved this problem when they developed Kiwi-B4. Phoebus-1 During the 1960s, scientists developed the Phoebus series of nuclear

428

Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analysis Analysis of Short-Bunch Production with the APS Booster and a Bunch Compressor Michael Borland, AOD/OAG ∗ August 8, 2003 1 Abstract There is significant interest among x-ray scientists in short-pulse x-rays. The x-rays from the APS ring, although very bright, are produced by an electron bunch with an rms length of more than 30 ps. Typically, it is only a linear accelerator that can produce a very short bunch. An idea was brought to my attention by Glenn Decker that might allow us to produce a short bunch using the APS booster. This idea involves extracting the beam from the booster at 3 to 4 GeV, while it is still relatively short, then compressing it with a magnetic bunch compressor. In this note, we present a preliminary analysis of this idea, along with the related idea of using a nonequilibrium beam from the APS photoinjector. 2 Background We will begin with an examination of the ideal result

429

Lab's 70th Anniversary lecture series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

February 2013 » February 2013 » Lab's 70th Anniversary Lecture Series Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Lab's 70th Anniversary lecture series The Bradbury Science Museum is hosting a public lecture series with a different talk held each month through the end of the year. February 1, 2013 dummy image Read our archives. Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email All lectures begin at 5:30 p.m. and are held at the museum,1350 Central Avenue, Los Alamos. To mark the Laboratory's 70th anniversary this year, its Bradbury Science Museum is hosting a public lecture series with a different talk held each month through the end of the year. They are free and open to the public on

430

Celebrating Einstein A Series of Articles  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Series of Articles A Series of Articles "Albert Einstein is undoubtedly one of the most fascinating and influential figures of the modern era. As a preeminent physicist, he radically transformed our understanding of the universe." - Edited excerpt from Albert Einstein, Albert Einstein Archives, The Hebrew University of Jerusalem In this series about Albert EinsteinÂ’s body of work, his discoveries are related to todayÂ’s research, technology, and common knowledge. Series themes include "How did Einstein know that?" and "How did Einstein figure that out?" and they focus either on conveying a major concept or on the reasoning that led to it. These articles will also cover EinsteinÂ’s major 1905 writings and address his general theory of relativity. In consideration of 2005 being designated as the World Year of Physics, the release of these articles is especially appropriate.

431

The Manhattan Project National Security History Series  

Broader source: Energy.gov (indexed) [DOE]

The Manhattan Project National Security History Series 5 Visit our Manhattan Project web site: http://www.cfo.doe.gov/me70/manhattan/index.htm 5 DOE/MA-0002 Revised F. G. Gosling Office of History and Heritage Resources Executive Secretariat Office of Management Department of Energy January 2010 The Manhattan Project National Security History Series 5 National Security History Series Volume I: The Manhattan Project: Making the Atomic Bomb Volume II: Building the Nuclear Arsenal: Cold War Nuclear Weapons Development and Production, 1946-1989 (in progress) Volume III: Nonproliferation and Stockpile Stewardship: The Nuclear Weapons Complex in the Post-Cold War World (projected) The National Security History Series is a joint project of the Office

432

Summer Series 2012 - Conversation with Omar Yaghi  

ScienceCinema (OSTI)

Jeff Miller, head of Public Affairs, sat down in conversation with Omar Yaghi, director of the Molecular Foundry, in the first of a series of "powerpoint-free" talks on July 11th 2012, at Berkeley Lab.

Omar Yaghi

2013-06-24T23:59:59.000Z

433

ORC Seminar Series Presents: "Nonlinear laser lithography  

E-Print Network [OSTI]

ORC Seminar Series Presents: "Nonlinear laser lithography: formation of self-authored 50 journal and more than 150 conference papers and he has given more than 100 invited talks. http://www.orc

Anderson, Jim

434

2012-2013 Series College of Agriculture  

E-Print Network [OSTI]

2012-2013 Series College of Agriculture and School of Human Environmental Sciences University about the accreditation of University of Kentucky. AgriculturalBiotechnology Agriculturalbiotechnologyencompassescellularandmolecularapproaches to the manipulation and improvement of agricultural plants, animals and microorganisms

Hayes, Jane E.

435

Climate Change Task Force Webinar Series  

Broader source: Energy.gov [DOE]

The four-part Climate Change Impacts and Indian Country webinar series provided tribal leaders an opportunity to share their insights, experiences, and ideas with President Obama’s State, Local,...

436

Frontiers in Biological Sciences Seminar Series Presents  

E-Print Network [OSTI]

Frontiers in Biological Sciences Seminar Series Presents Integrated Molecular Approaches to Study Professor, Departments of Earth and Planetary Science and Environmental Science, Policy, Management) methods with geochemical approaches, it has been possible to begin to determine how these communities

437

CLEAN Webinar Series 2 | Open Energy Information  

Open Energy Info (EERE)

JPG Triangle Right.JPG Webinar3.JPG Webinar4.JPG Webinar5.JPG Ret rieved from "http:en.openei.orgwindex.php?titleCLEANWebinarSeries2&oldid67800...

438

CLEAN Webinar Series 3 | Open Energy Information  

Open Energy Info (EERE)

JPG Webinar3.JPG Triangle Right.JPG Webinar4.JPG Webinar5.JPG Ret rieved from "http:en.openei.orgwindex.php?titleCLEANWebinarSeries3&oldid678001...

439

2014-2015Series Public Health  

E-Print Network [OSTI]

2014-2015Series College of Public Health University of Kentucky is accredited by the Southern) .......................................................... 3 *BST 330 Statistical Thinking for Population Health *CPH 201 Introduction to Public Health

MacAdam, Keith

440

Summer Series 2012 - Conversation with Kathy Yelick  

ScienceCinema (OSTI)

Jeff Miller, head of Public Affairs, sat down in conversation with Kathy Yelick, Associate Berkeley Lab Director, Computing Sciences, in the second of a series of "powerpoint-free" talks on July 18th 2012, at Berkeley Lab.

Kathy Yelick

2013-06-24T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

ACS SYMPOSIUM SERIES 966 Rational Environmental  

E-Print Network [OSTI]

ACS SYMPOSIUM SERIES 966 Rational Environmental Management of Agrochemicals Risk Assessment-Bayo, Editor Chiha University Sponsored by the ACS Division of Agrochemicals American Chemical Society of agrochemicals : risk assessment, monitoring, and remedial action / Ivan R. Kennedy, editor. ..[et al

Hammock, Bruce D.

442

Advances in Photosynthesis and Respiration Series Editor  

E-Print Network [OSTI]

Springer Advances in Photosynthesis and Respiration Series Editor: Govindjee, University of Illinois at Urbana-Champaign, USA Volume 29 Photosynthesis in silico Understanding Complexity from Molecules to Ecosystems Edited by; A. Laisk, L. Nedbal, and Govindjee Photosynthesis in silico

Govindjee "Gov"

443

Principle and characteristics of a fault current limiter with series compensation  

SciTech Connect (OSTI)

A fault current limiter with series compensation, which is composed of a compensation capacitor and a limiting reactor in series, is proposed. A solid-state switch connected in parallel with the capacitor controls either the ordinal series compensation or fault current limitations. A feasibility study of the current limiter by simulation analysis is presented and the effectiveness of the current limiter is evaluated from the viewpoints of transient stability improvement and device capacity. The current limiter is a useful protection device for large, high power transmission systems.

Sugimoto, S. [Chubu Electric Power Co., Inc., Nagoya (Japan). Electric Power Research and Development Center] [Chubu Electric Power Co., Inc., Nagoya (Japan). Electric Power Research and Development Center; Kida, J.; Arita, H.; Fukui, C. [Hitachi Ltd., Ibaraki (Japan)] [Hitachi Ltd., Ibaraki (Japan); Yamagiwa, T. [Hitachi Ltd., Kokubu (Japan). Kokubu Works] [Hitachi Ltd., Kokubu (Japan). Kokubu Works

1996-04-01T23:59:59.000Z

444

Longitudinal Analysis of Short term Bronchiolitis Air Pollution Association using Semi Parametric Models  

E-Print Network [OSTI]

pollution, semi parametric models. 1.1 Introduction Time-series studies of air pollution and health was an overestimation of the eect of air pollution on health. More recently, in a issue of Epidemiology, Ramsay et al1 Longitudinal Analysis of Short term Bronchiolitis Air Pollution Association using Semi Parametric

Mesbah, Mounir

445

Identifying eroding and depositional reaches of valley by analysis of suspended sediment transport  

E-Print Network [OSTI]

Identifying eroding and depositional reaches of valley by analysis of suspended sediment transport in suspended sediment transport and storage along the Sacramento River were assessed by evaluating the suspended sediment budget for the main channel accounting for all tributaries and diversions. Time series

Singer, Michael

446

Modeling and analysis of pumps in a wastewater treatment plant: A data-mining approach  

E-Print Network [OSTI]

Modeling and analysis of pumps in a wastewater treatment plant: A data-mining approach Andrew Available online 28 April 2013 Keywords: Data mining Pump modeling Multi-layer perceptron neural network Time series Pump scheduling and controlling Energy consumption a b s t r a c t A data-mining approach

Kusiak, Andrew

447

Physics 116A Winter 2011 The Alternating Series Test  

E-Print Network [OSTI]

Physics 116A Winter 2011 The Alternating Series Test An alternating series is defined to be a series of the form: S = n=0 (-1)n an , (1) where all the an > 0. The alternating series test is a set and/or property 2 do not hold, then the alternating series test is inconclusive. Note that property 1

California at Santa Cruz, University of

448

Physics 116A Winter 2011 The Alternating Series Test  

E-Print Network [OSTI]

Physics 116A Winter 2011 The Alternating Series Test An alternating series is defined to be a series of the form: S = # # n=0 (-1) n a n , (1) where all the a n > 0. The alternating series test but property 1 and/or property 2 do not hold, then the alternating series test is inconclusive. Note

California at Santa Cruz, University of

449

Multichannel Quantum Defect Theory of Strontium Rydberg Series  

E-Print Network [OSTI]

Using the reactance matrix approach, we systematically develop new multichannel quantum defect theory models for the singlet and triplet S, P, D and F states of strontium based on improved energy level measurements. The new models reveal additional insights into the character of doubly excited perturber states, and the improved energy level measurements for certain series allow fine structure to be resolved for those series' perturbers. Comparison between the predictions of the new models and those of previous empirical and \\emph{ab initio} studies reveals good agreement with most series, however some discrepancies are highlighted. Using the multichannel quantum defect theory wave functions derived from our models we calculate other observables such as Land\\'e $g_J$-factors and radiative lifetimes. The analysis reveals the impact of perturbers on the Rydberg state properties of divalent atoms, highlighting the importance of including two-electron effects in the calculations of these properties. The work enables future investigations of properties such as Stark maps and long-range interactions of Rydberg states of strontium.

C L Vaillant; M P A Jones; R M Potvliege

2014-02-24T23:59:59.000Z

450

Frontiers in Chemical Physics and Analysis Seminar Series  

E-Print Network [OSTI]

functional theory and first principles electronic structure calculations. We discuss how the host molecule measure the electronic spectra by laser-induced fluorescence (LIF), mass-selected resonance enhanced

451

Joint Outreach Task Group Video Series | Department of Energy  

Office of Environmental Management (EM)

Video Series Joint Outreach Task Group Video Series The purpose of this video series is to provide an overview of the roles and responsibilities of the federal government offices...

452

Energy Efficiency and Conservation Loan Program Webinar Series...  

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

Energy Efficiency and Conservation Loan Program Webinar Series-- 2 Evalution, Monitoring & Verification Energy Efficiency and Conservation Loan Program Webinar Series-- 2...

453

Energy Efficiency and Conservation Loan Program Webinar Series...  

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

Energy Efficiency and Conservation Loan Program Webinar Series-- 1 Overview and Cost Effectiveness Energy Efficiency and Conservation Loan Program Webinar Series-- 1 Overview and...

454

National Adaptation Forum Webinar Series: Out of Town, Not Out...  

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

Adaptation Forum Webinar Series: Out of Town, Not Out of Trouble: Small Agriculture and Indigenous Communities National Adaptation Forum Webinar Series: Out of Town, Not Out of...

455

DOE Tribal Renewable Energy Webinar Series 2015 Flier  

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

Power Administration (Western), is pleased to continue its sponsorship of the DOE Tribal Renewable Energy Webinar Series for 2015. The webinar series is part of DOE's coordinated...

456

Chassis Dynamometer Testing of Parallel and Series Diesel Hybrid...  

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

Chassis Dynamometer Testing of Parallel and Series Diesel Hybrid Buses Chassis Dynamometer Testing of Parallel and Series Diesel Hybrid Buses Emissions and fuel economy data were...

457

3800 Green Series Cost Elements | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

(formerly EPP) Program 3800 Green Series Cost Elements 06112014 (Rev. 7) 3800 Green Series Cost Elements More Documents & Publications 1 OPAM Policy Acquisition Guides...

458

Building America Best Practices Series, Volume 13 - Energy Performance...  

Energy Savers [EERE]

Series, Volume 13 - Energy Performance Techniques and Technologies: Perserving Historic Homes Building America Best Practices Series, Volume 13 - Energy Performance Techniques and...

459

Influence of Activation (Reduction) Conditions on the Catalytic Activity of Copper-Zinc Catalysts of NTK-10 Series  

Science Journals Connector (OSTI)

X-ray phase analysis and the temperature-programmed reduction method were applied to study the activation (reduction) of copper-zinc catalysts of the NTK-10 series. The catalytic activity of catalysts reduced ...

P. D. Androsov; I. A. Mamaeva; E. Z. Golosman

2004-07-01T23:59:59.000Z

460

Piecewise Adiabatic Passage with a Series of Femtosecond Pulses  

SciTech Connect (OSTI)

We develop a method of executing complete population transfers between quantum states in a piecewise manner using a series of femtosecond laser pulses. The method can be applied to a large class of problems as it benefits from the high peak powers and large spectral bandwidths afforded by femtosecond pulses. The degree of population transfer is robust to a wide variation in the absolute and relative intensities, durations, and time ordering of the pulses. The method is studied in detail for atomic sodium where piecewise adiabatic population transfer, as well as the induction of Ramsey-type interferences, is demonstrated.

Shapiro, E. A. [Department of Chemistry, University of British Columbia, Vancouver, V6T1Z3 (Canada); Milner, V. [Department of Chemistry, University of British Columbia, Vancouver, V6T1Z3 (Canada); Department of Physics, University of British Columbia, Vancouver, V6T1Z3 (Canada); Menzel-Jones, C. [Department of Physics, University of British Columbia, Vancouver, V6T1Z3 (Canada); Shapiro, M. [Department of Chemistry, University of British Columbia, Vancouver, V6T1Z3 (Canada); Department of Physics, University of British Columbia, Vancouver, V6T1Z3 (Canada); Department of Chemical Physics, Weizmann Institute, Rehovot, 76100 (Israel)

2007-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "time series analysis" 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

Space Radiation and Cataracts (LBNL Summer Lecture Series)  

ScienceCinema (OSTI)

Summer Lecture Series 2009: Eleanor Blakely, radiation biologist of the Life Sciences Division at Lawrence Berkeley National Laboratory, has been a scientist at Berkeley Lab since 1975. She is studying the effect of radiation on cataracts which concerns not only cancer patients, but also astronauts. As astronauts spend increasingly longer time in space, the effects of cosmic radiation exposure will become an increasingly important health issue- yet there is little human data on these effects. Blakely reviews this emerging field and the contributions made at Berkeley Lab

Blakely, Eleanor

2011-04-28T23:59:59.000Z

462

User's Guide Agilent Technologies 8560 E-Series and EC-Series  

E-Print Network [OSTI]

User's Guide Agilent Technologies 8560 E-Series and EC-Series Spectrum Analyzers Manufacturing Part. Refer servicing to qualified personnel. To prevent electrical shock do not remove covers. WARNING Before power cable to a socket outlet provided with protective earth contact. WARNING There are many points

Ravikumar, B.

463

UC Laboratory Safety Systemwide Webinar Series  

E-Print Network [OSTI]

Force Report on Improving the Culture of Laboratory Safety in Academic Institutions Speaker: Dr. RobertUC Laboratory Safety Systemwide Webinar Series Webinars are being developed and will be scheduled on the following topics, with all webinars to be recorded and posted on the UC Lab Safety SharePoint site. ACS Task

Tsien, Roger Y.

464

Denman Forestry Issues Series presents: "Seeking Sustainability"  

E-Print Network [OSTI]

and Introduction - Dr. B. Bruce Bare, Dean, College of Forest Resources 10:20 - 10:45 Sustainability in the FaceDenman Forestry Issues Series presents: "Seeking Sustainability" Monday, November 18, 2002, 10AM how to manage natural resources in a sustainable way. The question of sustainability is a complex one

Borenstein, Elhanan

465

Robo-Ethics Continuing Education Series  

E-Print Network [OSTI]

Robo-Ethics Continuing Education Series (RECES) 2013 Consortium for Robotics and Unmanned Systems potential ethical dangers or greater potential ethical rewards?" Monday 23 September 2013 1300 - 1500 for Ethics, Law and Armed Con ict (ELAC) in Oxford, UK: Specializing in ethics, broadly construed, both

466

2014-2015Series College of Agriculture,  

E-Print Network [OSTI]

2014-2015Series College of Agriculture, Food and Environment University of Kentucky is accredited of University of Kentucky. Agricultural Economics The Agricultural Economics program enables graduates to pursue and production. Opportunities are also available in public policy for agriculture and rural America

MacAdam, Keith

467

2012-2013 Series College of Agriculture  

E-Print Network [OSTI]

2012-2013 Series College of Agriculture and School of Human Environmental Sciences University about the accreditation of University of Kentucky. AgriculturalEconomics The Agricultural Economics for agriculture and rural America and environmental economics. These career opportunities may be found in both

Hayes, Jane E.

468

Distinguished Lecturer Series Understanding Climate Change  

E-Print Network [OSTI]

Distinguished Lecturer Series Understanding Climate Change: Opportunities and Challenges for Data A Climate change is the defining environmental challenge facing our planet, yet there is considerable.Anew and transformative approach is required to understand the potential impact of climate change. Data driven approaches

California at Davis, University of

469

Solar Instructor Series A PROJECT BY  

E-Print Network [OSTI]

9. NEC ® 2011 Code Updates PV 10. Integra ng Solar into Exis ng Curricula 11. How to Land YourSolar Instructor Series A PROJECT BY: FUNDING PROVIDED BY: The NC Solar Center at NC State University is the Southern Mid Atlan c Provider of Solar Instructor Training (SMAPSIT) a Train

470

Boston University Seminar Series on Climate Change  

E-Print Network [OSTI]

Boston University Seminar Series on Climate Change Free and open to the public Thursdays, September for Societal Change Matthew Nisbet, Associate Professor of Communication Studies, Public Policy and Urban National Assessments of Climate Change Tony Janetos, Professor of Earth and Environment and Director

Marchant, David R.

471

NZER WORKING PAPER SERIES BOLIVIA'S ECONOMIC CRISIS  

E-Print Network [OSTI]

process throughout this century, --1-- #12;'acle I Economic Performance in the jg8Os, Se'ected CountriesNZER WORKING PAPER SERIES BOLIVIA'S ECONOMIC CRISIS Juan Antonio Morales Jeffrey Sachs Working Paper No. 2620 NATIONAL BUREAU OF ECONOMIC RESEARCH 1050 Massachusetts Avenue Cambridge, MA 02138

472

HEART SMART NUTRITION Lesson Series Evaluation  

E-Print Network [OSTI]

HEART SMART NUTRITION Lesson Series Evaluation Please check the appropriate column if you did any of these activities either before or after receiving and reading the HeartSmart Nutrition lessons. Lifestyle Practices/Activities BEFORE Reading Lessons AFTER Reading Lessons Read any heart disease and nutrition information or website

473

756 RESONANCE August 2013 SERIES ARTICLE  

E-Print Network [OSTI]

turbines, Betz law, offshore wind parks. Challenges in the Quest for Clean Energies 3. Wind Technologies using wind turbines. There are different kinds of wind turbines and a detailed discussion of each756 RESONANCE August 2013 SERIES ARTICLE Keywords Wind energy, horizontal and ver- tical axis

Srinivasan, N.

474

Physics Meets Biology (LBNL Summer Lecture Series)  

ScienceCinema (OSTI)

Summer Lecture Series 2006: If scientists could take advantage of the awesomely complex and beautiful functioning of biologys natural molecular machines, their potential for application in many disciplines would be incalculable. Nobel Laureate and Director of the Lawrence Berkeley National Laboratory Steve Chu explores Possible solutions to global warming and its consequences.

Chu, Steve [Director, LBNL

2011-04-28T23:59:59.000Z

475

LM79XX Series 3-Terminal Negative Regulators  

E-Print Network [OSTI]

LM79XX Series 3-Terminal Negative Regulators General Description The LM79XX series of 3-terminal external component -- a compensation ca- pacitor at the output. The LM79XX series is packaged in the TO-220 conditions. Low ground pin current of the LM79XX series allows output voltage to be easily boosted above

Berns, Hans-Gerd

476

X-ray Practicals Series 1 Advanced Data Reduction  

E-Print Network [OSTI]

X-ray Practicals Series 1 Advanced Data Reduction Instructor J. Reibenspies, Ph. D. Nattamai Bhuvanesh, Ph.D. Version 1.0.0 #12;X-ray Practicals Series 2 #12;X-ray Practicals Series 3 #12;X-ray is good. The y direction is shifting the most, but the shift is ok #12;X-ray Practicals Series 5 Other

Meagher, Mary

477

Boiling water reactor stability analysis with RETRAN-03  

SciTech Connect (OSTI)

An MOC option has been developed to eliminate the numerical diffusion associated with the time domain analysis of small perturbations. This model has been implemented as an option in RETRAN-03 and evaluated for BWR stability applications by comparing RETRAN analyses results with data from a series of stability tests from the Vermont Yankee reactor. The results indicate that the MOC option can be used to evaluate BWR stability conditions.

Bergeron, P.A.; Fujita, N.; Paulsen, M.P.; McFadden, J.H.; Agee, L.J.

1994-12-31T23:59:59.000Z

478

Equivariant singularity analysis of the 2:2 resonance  

E-Print Network [OSTI]

We present a general analysis of the bifurcation sequences of 2:2 resonant reversible Hamiltonian systems invariant under spatial $\\Z_2\\times\\Z_2$ symmetry. The rich structure of these systems is investigated by a singularity theory approach based on the construction of a universal deformation of the detuned Birkhoff normal form. The thresholds for the bifurcations are computed as asymptotic series also in terms of physical quantities for the original system.

Antonella Marchesiello; Giuseppe Pucacco

2013-12-17T23:59:59.000Z

479

2013 Tribal Renewable Energy Webinar Series to Kick Off January 30 |  

Broader source: Energy.gov (indexed) [DOE]

Tribal Renewable Energy Webinar Series to Kick Off January 30 Tribal Renewable Energy Webinar Series to Kick Off January 30 2013 Tribal Renewable Energy Webinar Series to Kick Off January 30 January 24, 2013 - 3:52pm Addthis In response to popular demand, the DOE Office of Indian Energy Policy and Programs, the Office of Energy Efficiency and Renewable Energy Tribal Energy Program, and Western Area Power Administration will continue their joint sponsorship of the Tribal Renewable Energy Webinar Series in 2013. The DOE Office of Indian Energy will kick off this year's schedule on January 30 from 11 a.m. to 12:30 p.m. Mountain Time with a webinar entitled Strategic Technical Response Team (START) and Online Education Program Update. Presented by DOE Indian Energy START team members Elizabeth Doris and Alexander Dane of DOE's National Renewable Energy Laboratory, this

480

Reduction in maximum time uncertainty of paired time signals  

DOE Patents [OSTI]

Reduction in the maximum time uncertainty (t/sub max/ - t/sub min/) of a series of paired time signals t/sub 1/ and t/sub 2/ varying between two input terminals and representative of a series of single events where t/sub 1/ less than or equal to t/sub 2/ and t/sub 1/ + t/sub 2/ equals a constant, is carried out with a circuit utilizing a combination of OR and AND gates as signal selecting means and one or more time delays to increase the minimum value (t/sub min/) of the first signal t/sub 1/ closer to t/sub max/ and thereby reduce the difference. The circuit may utilize a plurality of stages to reduce the uncertainty by factors of 20 to 800.

Theodosiou, G.E.; Dawson, J.W.

1981-02-11T23:59:59.000Z

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


481

A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump SMARTER EUROPE E-world energy & water 2014 Proceedings page 1  

E-Print Network [OSTI]

A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump Decisions for Heating Based on an Air-to-Water Heat pump Jan Treur VU University Amsterdam, Agent Systems be most efficient to use this energy in these periods. For air to water heat pumps a similar issue occurs

Treur, Jan

482

Jefferson Lab Science Series - Current Schedule  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Current Science Series Schedule Current Science Series Schedule Lectures are free and open to students and adults with an interest in science. All lectures begin at 7:00 pm in CEBAF Center Auditorium [Download a Map] [Locate Jefferson Lab on Google Maps] [Display a QR Code for Scanning] and last for about an hour. Seating in the CEBAF Center Auditorium and overflow area is limited to about 300 people. Seating is on a first come, first served basis. Unfortunately, people arriving once capacity has been reached will be turned away. A live video stream will be available for those not able to attend in person. Lectures will be added to the video archive for on-demand viewing upon approval from the presenter. NOTICE: For security purposes, everyone over 16 is asked to carry a photo I.D. Security guards may inspect vehicles, book bags and purses.

483

Satellite stories featured in Lab lecture series  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

February » February » Satellite stories featured Satellite stories featured in Lab lecture series Space adventures will be featured in the upcoming Frontiers in Science lecture series "Small Satellites on a Shoestring: The LANL Experience." February 14, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

484

SSRL Presents Series | Stanford Synchrotron Radiation Lightsource  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Presents Series Presents Series Date Seminar Title 11/20/2013 Graphite and its Hidden Superconductivity 11/20/2013 Graphite and its Hidden Superconductivity 10/24/2013 Atomic-Resolution Spectroscopic Imaging and In Situ Environmental Study of Bimetallic Nanocatalysts by Fast Electrons 10/09/2013 New developments with SDD detectors 09/25/2013 X-ray and neutron scattering studies of the complex compounds 09/09/2013 Dopant Site Determination in Iron Oxide Nanoparticles Utilizing X-ray Absorption Techniques 08/21/2013 Correlating Spatial Heterogeneities in Porosity and Permeability with Metal Poisoning within an Individual Catalyst Particle using X-ray Microscopy 08/12/2013 Lensless Imaging of Atomic Surface Structures via Ptychography 08/09/2013 The Best of Both Worlds: Bulk Diamond Properties Realized at the Nanoscale

485

Issues in International Energy Consumption Analysis: Electricity...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electricity Usage in India's Housing Sector SERIES: Issues in International Energy Consumption Analysis Electricity Usage in India's Housing Sector Release date: November 7, 2014...

486

Laboratory tests, statistical analysis and correlations for regained permeability and breakthrough time in unconsolidated sands for improved drill-in fluid cleanup practices.  

E-Print Network [OSTI]

??Empirical models for estimating the breakthrough time and regained permeability for selected nondamaging drill-in fluids (DIF's) give a clear indication of formation damage and proper… (more)

Serrano, Gerardo Enrique

2012-01-01T23:59:59.000Z

487

Using Soir Lucene for Large-Scale Metagenomics Data Retrieval and Analysis (MICW - Metagenomics Informatics Challenges Workshop: 10K Genomes at a Time)  

ScienceCinema (OSTI)

JCVI's Johannes Goll on "Using Solr/Lucene for Large-Scale Metagenomics Data Retrieval and Analysis" at the Metagenomics Informatics Challenges Workshop held at the DOE JGI on October 12-13, 2011.

Goll, Johannes [JCVI

2013-01-22T23:59:59.000Z

488

Jefferson Lab Science Series - Understanding Flight: A Physical Description  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physics of Stock Car Racing Physics of Stock Car Racing Previous Video (The Physics of Stock Car Racing) Science Series Video Archive Next Video (The Hidden World of Technology) The Hidden World of Technology Understanding Flight: A Physical Description of How Airplanes Fly Dr. Scott Eberhardt - University of Washington March 23, 2004 Did you ever wonder how a Boeing 747, weighing 910,000 lbs at takeoff can possibly get off the ground? Or, did you ever wonder how airplanes fly upside down? Why is there a "backside of the power curve?" What makes a wing efficient? These questions can be answered when lift is developed in terms of Newton's laws. A Newtonian description of lift gives an intuitive feel for how airplanes fly, without the need for complicated analysis or approximations. Through the application of Newton's three laws, we will

489

NREL: Energy Analysis - Andrew Weekley  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Andrew Weekley Andrew Weekley Andrew Weekley is a member of the Energy Forecasting and Modeling Group in the Strategic Energy Analysis Center. Software Engineer On staff since January 2013 Phone number: 303-275-3680 E-mail: andrew.weekley@nrel.gov Areas of expertise MATLAB Expert systems Scientific data analysis Primary research interests Time series segmentation and classification Image segmentation and classification Machine intelligent algorithms Education and background training B.A. in physics and mathematics, University of Colorado, Boulder, 1990 Prior work experience Software Engineer, National Center for Atmospheric Research (NCAR), Boulder, CO, (1997-2012) Member Technical Staff, Raytheon (formerly Hughes), Aurora, Co, (1990-1997) Selected publications Weekley, R.A.; Goodrich, R. K.; and Cornman, L. B. (2010). "An Algorithm

490

Optimization of a CNG series hybrid concept vehicle  

SciTech Connect (OSTI)

Compressed Natural Gas (CNG) has favorable characteristics as a vehicular fuel, in terms of fuel economy as well as emissions. Using CNG as a fuel in a series hybrid vehicle has the potential of resulting in very high fuel economy (between 26 and 30 km/liter, 60 to 70 mpg) and very low emissions (substantially lower than Federal Tier II or CARB ULEV). This paper uses a vehicle evaluation code and an optimizer to find a set of vehicle parameters that result in optimum vehicle fuel economy. The vehicle evaluation code used in this analysis estimates vehicle power performance, including engine efficiency and power, generator efficiency, energy storage device efficiency and state-of-charge, and motor and transmission efficiencies. Eight vehicle parameters are selected as free variables for the optimization. The optimum vehicle must also meet two perfect requirements: accelerate to 97 km/h in less than 10 s, and climb an infinitely long hill with a 6% slope at 97 km/h with a 272 kg (600 lb.) payload. The optimizer used in this work was originally developed in the magnetic fusion energy program, and has been used to optimize complex systems, such as magnetic and inertial fusion devices, neutron sources, and mil guns. The optimizer consists of two parts: an optimization package for minimizing non-linear functions of many variables subject to several non-linear equality and/or inequality constraints and a programmable shell that allows interactive configuration and execution of the optimizer. The results of the analysis indicate that the CNG series hybrid vehicle has a high efficiency and low emissions. These results emphasize the advantages of CNG as a near-term alternative fuel for vehicles.

Aceves, S.M.; Smith, J.R.; Perkins, L.J.; Haney, S.W.; Flowers, D.L.

1995-09-22T23:59:59.000Z

491

Radon Series Comp. Appl. Math 8, 129 c de Gruyter 2009 Optimal consumption and investment with  

E-Print Network [OSTI]

Radon Series Comp. Appl. Math 8, 1�29 c de Gruyter 2009 Optimal consumption and investment investment/con- sumption problem for continuous time market models. By applying results from sto- chastic, together with margin tradings on certain financial products, the exposure to losses of investments

Paris-Sud XI, Université de

492

Gerald R. Ford School of Public Policy, University Of Michigan National Poverty Center Working Paper Series  

E-Print Network [OSTI]

to the child--the mother's labor supply. The time commitment involved in caring for a child in poor health may Paper Series #04-6 May 2004 Mothers' Labor Supply in Fragile Families: The Role of Child Health Hope in Fragile Families: The Role of Child Health Hope Corman Rider University National Bureau of Economic

Shyy, Wei

493

The Fuzzy Time-Cost-Quality-Environment Trade-off Analysis of Resource-Constrained Multi-mode Construction Systems for Large-Scale Hydroelectric Projects  

Science Journals Connector (OSTI)

This paper studies the fuzzy time-cost-quality-environment trade-off problem of construction project and establishes a decision making model with multiple modes under resource-constrained environment. The objecti...

Huan Zheng

2014-01-01T23:59:59.000Z

494

The Fuzzy Time-Cost-Quality-Environment Trade-off Analysis of Multi-mode Construction Systems for Large-scale Hydroelectric Projects  

Science Journals Connector (OSTI)

This paper studies the time-cost-quality-environment trade-off problem of construction project and establishes a multi-objective decision making model under a fuzzy environment. The objective functions are to min...

Huan Zheng

2014-01-01T23:59:59.000Z

495

The Immunology Series Comes to an End  

Science Journals Connector (OSTI)

...recent immunology Nobelist, admonishes us that we must heighten our capacity to maintain the immunity of individuals as well as the herd immunity of humankind. He broadens a hypothesis, initially developed in relation to allergy, that the increasing incidence of autoimmune diseases and allergies may well... The thought-provoking article by Zinkernagel in this issue of the Journal 1 brings to a close the series of review articles on immunology that have been appearing in these pages during the past 17 months. Those who have read these reviews will conclude ...

Rosen F.S.; Mackay I.

2001-11-01T23:59:59.000Z

496

DOE Webinar: Solar Program Overview (EECLP Webinar Series) |...  

Energy Savers [EERE]

DOE Webinar: Solar Program Overview (EECLP Webinar Series) DOE Webinar: Solar Program Overview (EECLP Webinar Series) January 22, 2015 3:00PM to 4:00PM EST Hear from our solar...

497

Series Resonant Inverter with Contactless Transformers for Multiple LED Lamps.  

E-Print Network [OSTI]

??A half-bridge series-resonant inverter adopted to realize the quasi current source and the constant current source with a number of contactless transformers in series for… (more)

Cheng, Shuen-Wen

2013-01-01T23:59:59.000Z

498

DOE Tribal Renewable Energy Series Webinar: Putting It All Together...  

Energy Savers [EERE]

DOE Tribal Renewable Energy Series Webinar: Putting It All Together DOE Tribal Renewable Energy Series Webinar: Putting It All Together October 29, 2014 5:00PM to 6:30PM EDT...

499

Green Racing Series Revs Engines with Renewable Fuel from INEOS...  

Energy Savers [EERE]

Green Racing Series Revs Engines with Renewable Fuel from INEOS Bio Green Racing Series Revs Engines with Renewable Fuel from INEOS Bio March 17, 2014 - 2:55pm Addthis A racecar...

500

National High Magnetic Field Laboratory - Series Connected Hybrid  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Magnet Lab Series Connected Hybrid for Magnet Lab Figure 1. Vertical Section of the Series Connected Hybrid Magnet for the Mag Lab. The Magnet Lab has embarked on innovative...