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Sample records for joint inversion system

  1. Joint inversion of electrical and seismic data for Fracture char...

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

    Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems Joint inversion of electrical and seismic data for Fracture char....

  2. Time-lapse Joint Inversion of Geophysical Data and its Applications...

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

    Time-lapse Joint Inversion of Geophysical Data and its Applications to Geothermal Prospecting Time-lapse Joint Inversion of Geophysical Data and its Applications to Geothermal...

  3. Fluid Imaging of Enhanced Geothermal Systems through Joint 3D...

    Open Energy Info (EERE)

    Fluid Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Inverse Modeling Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011....

  4. Joint inversion of receiver function and ambient noise based on Bayesian theory

    E-Print Network [OSTI]

    van der Hilst, Robert D.

    In this study, we present a method for the joint inversion of receiver function and ambient noise based on Bayesian inverse theory (Tarantola, 1987, 2005). The nonlinear inversion method of the complex spectrum ratio of ...

  5. 2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data...

    Open Energy Info (EERE)

    situated in a graben. The joint inverted models show a better definition of shallow and deep structures. The results show that the extension of the benefits using joint inversion...

  6. Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to

    E-Print Network [OSTI]

    Farquharson, Colin G.

    Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to mineral exploration Peter G. Leli`evre, Colin G. Farquharson and Charles A. Hurich plelievre Seismic data (2 / 32) Leli`evre, Farquharson, Hurich, plelievre@mun.ca Joint inversion of seismic

  7. Joint two-dimensional DC resistivity and seismic travel time inversion with cross-gradients constraints

    E-Print Network [OSTI]

    Meju, Max

    Joint two-dimensional DC resistivity and seismic travel time inversion with cross to evaluate the structural features common to both methods. The cross-gradients function is incorporated method. The resultant iterative two-dimensional (2-D) joint inversion scheme is successfully applied

  8. A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide

    E-Print Network [OSTI]

    Fletcher, Sara E. Mikaloff

    A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 2. Regional results Andrew atmospheric CO2 gradients and transport simulations are combined with observations of ocean interior carbon (2007), A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 2. Regional results

  9. A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide

    E-Print Network [OSTI]

    Fletcher, Sara E. Mikaloff

    interprets in situ observations of carbon dioxide concentration in the ocean and atmosphere with transportA joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 1. Methods and global March 2007. [1] We have constructed an inverse estimate of surface fluxes of carbon dioxide using both

  10. Joint stochastic inversion of geophysical data for reservoir parameter estimation Jinsong Chen* and G. Michael Hoversten, Lawrence Berkeley National Laboratory

    E-Print Network [OSTI]

    Chen, Jinsong

    Joint stochastic inversion of geophysical data for reservoir parameter estimation Jinsong Chen to estimate porosity ( ) and water saturation (Sw) using multiple sources of information, including borehole the stochastic framework, both reservoir parameters and geophysical attributes at unsampled locations

  11. Annual Logging Symposium, June 3-6, 2007 JOINT INVERSION OF DENSITY AND RESISTIVITY LOGS FOR THE

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    of in-place hydrocarbon reserves. To gain better understanding of measurement behavior in interbedded measurements and hence result in inaccurate quantitative estimations of hydrocarbon reserves. Figure 2 compares a new joint inversion procedure that effectively combines borehole measurements of density and induction

  12. Joint inversion of seismic AVO and EM data for gas saturation estimation using a sampling-based stochastic model

    E-Print Network [OSTI]

    Chen, Jinsong

    non-economic and economic gas saturation because electrical resistivity of reservoir materialsJoint inversion of seismic AVO and EM data for gas saturation estimation using a sampling- based is developed to estimate gas saturation and porosity using seismic AVO and EM data. Markov chain Monte Carlo

  13. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields

    E-Print Network [OSTI]

    Chen, Jinsong

    of reservoir parameters (e.g., porosity and fluid saturation). Introduction Joint inversion of seismic AVA's equation and Archie's law) from nearby borehole logs to connect them through reservoir parameters (e.g., porosity and water saturation). However, in the exploration stage, this could be very difficult because

  14. Joint Radial Inversion of Resistivity and Sonic Logs to Estimate In-Situ Petrophysical and Elastic Properties of Formations

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    's dry bulk and shear moduli, porosity, and water saturation from the joint inversion of borehole array, with the formation model described by a radial variation of water and hydrocarbon saturations representative of mud in the frequency domain. Synthetic cases consider water-base mud filtrate invading a hydrocarbon-bearing sand

  15. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields: Stochastic inversion of AVA and CSEM data

    SciTech Connect (OSTI)

    Chen, J.; Hoversten, G.M.

    2011-09-15

    Joint inversion of seismic AVA and CSEM data requires rock-physics relationships to link seismic attributes to electrical properties. Ideally, we can connect them through reservoir parameters (e.g., porosity and water saturation) by developing physical-based models, such as Gassmann’s equations and Archie’s law, using nearby borehole logs. This could be difficult in the exploration stage because information available is typically insufficient for choosing suitable rock-physics models and for subsequently obtaining reliable estimates of the associated parameters. The use of improper rock-physics models and the inaccuracy of the estimates of model parameters may cause misleading inversion results. Conversely, it is easy to derive statistical relationships among seismic and electrical attributes and reservoir parameters from distant borehole logs. In this study, we develop a Bayesian model to jointly invert seismic AVA and CSEM data for reservoir parameter estimation using statistical rock-physics models; the spatial dependence of geophysical and reservoir parameters are carried out by lithotypes through Markov random fields. We apply the developed model to a synthetic case, which simulates a CO{sub 2} monitoring application. We derive statistical rock-physics relations from borehole logs at one location and estimate seismic P- and S-wave velocity ratio, acoustic impedance, density, electrical resistivity, lithotypes, porosity, and water saturation at three different locations by conditioning to seismic AVA and CSEM data. Comparison of the inversion results with their corresponding true values shows that the correlation-based statistical rock-physics models provide significant information for improving the joint inversion results.

  16. Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir characterization and petrophysical modeling: application to deepwater hydrocarbon

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir of migrated 3D pre-stack seismic data. The inversion algorithm is based on a Bayesian statistical search of elastic and petrophysical properties we resorted to amplitude information of 3D pre-stack seismic data

  17. wavelet domain inversion and joint deconvolution/interpolation of geophysical data

    E-Print Network [OSTI]

    Kane, Jonathan A. (Jonathan Andrew), 1973-

    2003-01-01

    This thesis presents two innovations to geophysical inversion. The first provides a framework and an algorithm for combining linear deconvolution methods with geostatistical interpolation techniques. This allows for sparsely ...

  18. Joint analysis of refractions with surface waves: An inverse solution to the refraction-traveltime problem

    E-Print Network [OSTI]

    Ivanov, Julian; Miller, Richard D.; Xia, Jianghai; Steeples, Don W.; Park, Choon Byong

    2006-11-01

    constraint. The application of the joint analysis of refractions with surface waves (JARS) method provided a more realistic solution than the conventional refraction/tomography methods, which did not benefit from a reference model derived from real data...

  19. Estimation of field-scale soil hydraulic and dielectric parametersthrough joint inversion of GPR and hydrological data

    SciTech Connect (OSTI)

    Kowalsky, Michael B.; Finsterle, Stefan; Peterson, John; Hubbard,Susan; Rubin, Yoram; Majer, Ernest; Ward, Andy; Gee, Glendon

    2005-05-05

    A method is described for jointly using time-lapse multiple-offset cross-borehole ground-penetrating radar (GPR) travel time measurements and hydrological measurements to estimate field-scale soil hydraulic parameters and parameters of the petrophysical function, which relates soil porosity and water saturation to the effective dielectric constant. We build upon previous work to take advantage of a wide range of GPR data acquisition configurations and to accommodate uncertainty in the petrophysical function. Within the context of water injection experiments in the vadose zone, we test our inversion methodology with synthetic examples and apply it to field data. The synthetic examples show that while realistic errors in the petrophysical function cause substantial errors in the soil hydraulic parameter estimates,simultaneously estimating petrophysical parameters allows for these errors to be minimized. Additionally, we observe in some cases that inaccuracy in the GPR simulator causes systematic error in simulated travel times, making necessary the simultaneous estimation of a correction parameter. We also apply the method to a three-dimensional field setting using time-lapse GPR and neutron probe (NP) data sets collected during an infiltration experiment at the U.S. Department of Energy (DOE) Hanford site in Washington. We find that inclusion of GPR data in the inversion procedure allows for improved predictions of water content, compared to predictions made using NP data alone.

  20. 3D joint inversion of gradient and total-field magnetic data Kristofer Davis and Yaoguo Li, Center for Gravity, Electrical, and Magnetics, Colorado School of Mines, Golden,

    E-Print Network [OSTI]

    for Gravity, Electrical, and Magnetics, Colorado School of Mines, Golden, Colorado SUMMARY Recently3D joint inversion of gradient and total-field magnetic data Kristofer Davis and Yaoguo Li, Center and demonstrate it with a synthetic and field example. INTRODUCTION Airborne magnetic gradiometry data

  1. Structure of the Crust beneath Cameroon, West Africa, from the Joint Inversion of Rayleigh Wave Group Velocities and Receiver Functions

    SciTech Connect (OSTI)

    Tokam, A K; Tabod, C T; Nyblade, A A; Julia, J; Wiens, D A; Pasyanos, M E

    2010-02-18

    The Cameroon Volcanic Line (CVL) is a major geologic feature that cuts across Cameroon from the south west to the north east. It is a unique volcanic lineament which has both an oceanic and a continental sector and consists of a chain of Tertiary to Recent, generally alkaline volcanoes stretching from the Atlantic island of Pagalu to the interior of the African continent. The oceanic sector includes the islands of Bioko (formerly Fernando Po) and Sao Tome and Principe while the continental sector includes the Etinde, Cameroon, Manengouba, Bamboutos, Oku and Mandara mountains, as well as the Adamawa and Biu Plateaus. In addition to the CVL, three other major tectonic features characterize the region: the Benue Trough located northwest of the CVL, the Central African Shear Zone (CASZ), trending N70 degrees E, roughly parallel to the CVL, and the Congo Craton in southern Cameroon. The origin of the CVL is still the subject of considerable debate, with both plume and non-plume models invoked by many authors (e.g., Deruelle et al., 2007; Ngako et al, 2006; Ritsema and Allen, 2003; Burke, 2001; Ebinger and Sleep, 1998; Lee et al, 1994; Dorbath et al., 1986; Fairhead and Binks, 1991; King and Ritsema, 2000; Reusch et al., 2010). Crustal structure beneath Cameroon has been investigated previously using active (Stuart et al, 1985) and passive (Dorbath et al., 1986; Tabod, 1991; Tabod et al, 1992; Plomerova et al, 1993) source seismic data, revealing a crust about 33 km thick at the south-western end of the continental portion of the CVL (Tabod, 1991) and the Adamawa Plateau, and thinner crust (23 km thick) beneath the Garoua Rift in the north (Stuart et al, 1985) (Figure 1). Estimates of crustal thickness obtained using gravity data show similar variations between the Garoua rift, Adamawa Plateau, and southern part of the CVL (Poudjom et al., 1995; Nnange et al., 2000). In this study, we investigate further crustal structure beneath the CVL and the adjacent regions in Cameroon using 1-D shear wave velocity models obtained from the joint inversion of Rayleigh wave group velocities and P-receiver functions for 32 broadband seismic stations. From the 1-D shear wave velocity models, we obtain new insights into the composition and structure of the crust and upper mantle across Cameroon. After briefly reviewing the geological framework of Cameroon, we describe the data and the joint inversion method, and then interpret variations in crustal structure found beneath Cameroon in terms of the tectonic history of the region.

  2. Joint Optimization of Wireless Communication and Networked Control Systems

    E-Print Network [OSTI]

    Joint Optimization of Wireless Communication and Networked Control Systems Lin Xiao1 , Mikael. With the coding and medium access schemes of the communication system fixed, the achievable bit rates and address the problem of allocating communication re- sources to optimize system performance. We observe

  3. Joint Optimization of Communication Rates and Linear Systems

    E-Print Network [OSTI]

    Joint Optimization of Communication Rates and Linear Systems L. Xiao M. Johansson H. Hindi S. Boyd system, such as a controller or estimator, in which several signals are transmitted over communication in the design of networked controllers and the associated communication systems, including bit rate limitations

  4. Coordinate system dependence of muscle forces predicted using optimization methods in musculoskeletal joints

    E-Print Network [OSTI]

    Pierce, Janine E. (Janine Elizabeth), 1980-

    2004-01-01

    Optimization methods are widely used to predict in-vivo muscle forces in musculoskeletal joints. Moment equilibrium at the joint center (usually defined as the origin of the joint coordinate system) has been used as a ...

  5. Inverse sensitivity analysis of SISO and MIMO systems using Maletinsky's spline-type modulation function method 

    E-Print Network [OSTI]

    Smith, Cherri Imelda

    1987-01-01

    of dynamic control systems. It allows direct, parametric observation of parameter deviations. In this aspect, inverse sensitivity theory is a powerful device in preventing the gradual deterioration of system performance. Normally large changes in system... systems. Another set of first-order inverse sensitivity functions were developed for the nonlinear-in-parameter systems. A method was offered for obtaining higher-order inverse sensitivity functions for nonlinear-in-parameter systems. The derived...

  6. Joint transmission system projects to improve system reliability

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

    5 12 JOINT NEWS RELEASE Bonneville Power Administration Puget Sound Energy Seattle City Light Snohomish PUD FOR IMMEDIATE RELEASE Tuesday, January 24, 2012 CONTACT: Mike Hansen,...

  7. Joint Inversion of Reservoir Production Measurements and 3D Pre-Stack Seismic Data: Proof Carlos Torres-Verdn, Zhan Wu, Omar J. Varela, Mrinal K. Sen, and Indrajit G. Roy.

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    Joint Inversion of Reservoir Production Measurements and 3D Pre-Stack Seismic Data: Proof-stack seismic data and fluid production history. The production measurements and the seismic data problem associated with the inversion. Fluid production measurements are sensitive to initial fluid

  8. Validation of the BERT Point Source Inversion Scheme Using the Joint Urban 2003 Tracer Experiment Dataset - Final Report

    SciTech Connect (OSTI)

    Brambilla, Sara [Los Alamos National Laboratory; Brown, Michael J. [Los Alamos National Laboratory

    2012-06-18

    A terrorist attack in a U.S. city utilizing biological weapons could have severe consequences. A biological agent could be aerosolized and emitted into the air in the middle of a city, invisibly traveling with the winds, and dosing an unknowing populace. The magnitude of the problem would only be revealed as sick people started arriving several days later at hospitals with symptoms, many already too ill to be saved. A national program has deployed a network of biological agent collectors in U.S. cities to provide early detection of a bio-weapon attack, thereby hastening medical intervention and potentially saving many thousands of lives. In fact, the most effective treatment takes place prior to infection or in its early stages and early warning might reduce the disease progression and, consequently, the possibility of an outbreak. If a biological attack were to occur in a city, one or more collectors may register hits with specific dosages and the city would be alerted that an attack had taken place. This piece of information alone, however, would not be enough to determine how serious the attack was, i.e., how much biological agent was released into the air and where the bio-plume traveled. The first responders and public health communities will want to know what regions were impacted, how many persons might get sick, which people most need medical supplies, and where to clean up. The law enforcement community will want to look for forensic evidence at the release location. The Bio-Agent Event Reconstruction Tool (BERT) has been developed in order to recreate what might have happened during an airborne biological agent attack based on biological agent collector measurements and wind collectors mounted around a city. The tool can be used to estimate possible release areas while eliminating other areas, and can estimate bounds on the amount of material released. The tool can then be used to project forward from the possible source areas to estimate potential hazard zones. Due to a unique source inversion technique - called the upwind collector footprint approach - the tool runs fast and the source regions can be determined in a few minutes. In this report, we provide an overview of the BERT framework, followed by a description of the source inversion technique. The Joint URBAN 2003 field experiment held in Oklahoma City that was used to validate BERT is then described. Subsequent sections describe the metrics used for evaluation, the comparison of the experimental data and BERT output, and under what conditions the BERT tool succeeds and performs poorly. Results are aggregated in different ways (e.g., daytime vs. nighttime releases, 1 vs. 2 vs. 3 hit collectors) to determine if BERT shows any systematic errors. Finally, recommendations are given for how to improve the code and procedures for optimizing performance in operational mode.

  9. The Dynamical Inverse Problem for Axisymmetric Stellar Systems

    E-Print Network [OSTI]

    David Merritt

    1996-06-05

    The standard method of modelling axisymmetric stellar systems begins from the assumption that mass follows light. The gravitational potential is then derived from the luminosity distribution, and a unique two-integral distribution function f(E,Lz) that generates the stellar density in this potential is found. We show that the gravitational potential can instead be generated directly from the velocity data in a two-integral galaxy, thus allowing one to drop the assumption that mass follows light. The rotational velocity field can also be recovered in a model-independent way. We present regularized algorithms for carrying out the inversions and test them by application to pseudo-data from a family of oblate models.

  10. Joint stochastic inversion of geophysical data for reservoir parameter estimation Jinsong Chen* and G. Michael Hoversten, Lawrence Berkeley National Laboratory

    E-Print Network [OSTI]

    Chen, Jinsong

    studies, reservoir parameters as well as geophysical attributes at unsampled locations were considered relationships between the reservoir parameters and the geophysical attributes were enforced. Those methods and the geophysical attributes. Unlike conventional inversion, our stochastic inversion of seismic P-wave velocity

  11. INVERSIONS OF INTEGRAL OPERATORS AND ELLIPTIC BETA INTEGRALS ON ROOT SYSTEMS

    E-Print Network [OSTI]

    Warnaar, Ole

    INVERSIONS OF INTEGRAL OPERATORS AND ELLIPTIC BETA INTEGRALS ON ROOT SYSTEMS VYACHESLAV P- metric integrals associated to a pair of root systems. Using the (A,C) inversion formula to invert one of the known C-type elliptic beta integrals, we obtain a new elliptic beta integral for the root system of type

  12. Expansion joint for guideway for magnetic levitation transportation system

    DOE Patents [OSTI]

    Rossing, T.D.

    1993-02-09

    An expansion joint that allows a guideway of a magnetic levitation transportation system to expand and contract while minimizing transients occurring in the magnetic lift and drag forces acting on a magnetic levitation vehicle traveling over the joint includes an upper cut or recess extending downwardly from the upper surface of the guideway and a non-intersecting lower cut or recess that extends upwardly from the lower surface of the guideway. The side walls of the cuts can be parallel to each other and the vertical axis of the guideway; the depth of the lower cut can be greater than the depth of the upper cut; and the overall combined lengths of the cuts can be greater than the thickness of the guideway from the upper to lower surface so that the cuts will overlap, but be spaced apart from each other. The distance between the cuts can be determined on the basis of the force transients and the mechanical behavior of the guideway. A second pair of similarly configured upper and lower cuts may be disposed in the guideway; the expansion joint may consist of two upper cuts and one lower cut; or the cuts may have non-parallel, diverging side walls so that the cuts have a substantially dove-tail shape.

  13. The Phase Inversion-based Coal-CO2 Slurry (PHICCOS) Feeding System

    E-Print Network [OSTI]

    The Phase Inversion-based Coal-CO2 Slurry (PHICCOS) Feeding System: Design, Coupled Multiscale by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . David E. Hardt Chairman, Department Committee on Graduate Studies #12;#12;The Phase Inversion-based Coal conveying of a solid feedstock like pulverized coal into a pressurized environment is a challenging task

  14. Joint transmission system projects to improve system reliability

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATIONIntroducingJobs HumanImaging NSRC Workshop5 12 JOINT NEWS

  15. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields

    E-Print Network [OSTI]

    Chen, Jinsong

    . Ideally, we can connect them through reservoir parameters (e.g., porosity and water saturation among seismic and electric attributes and reservoir parameters from distant borehole logs. In this study, we developed a Bayesian model to jointly invert seismic AVA and CSEM data for reservoir parameters

  16. Expansion Joint Concepts for High Temperature Insulation Systems 

    E-Print Network [OSTI]

    Harrison, M. R.

    1980-01-01

    As high temperature steam and process piping expands with heat, joints begin to open between the insulation sections, resulting in increased energy loss and possible unsafe surface temperatures. Many different expansion joint designs are presently...

  17. Assisted Seismic Matching: Joint Inversion of Seismic, Rock Physics and Basin Modeling Ulisses T. Mello*, IBM T. J. Watson Res. Center, Stewart A. Levin, Halliburton, Vanessa Lopez, Andrew Conn,

    E-Print Network [OSTI]

    Zhang, Hongchao

    Assisted Seismic Matching: Joint Inversion of Seismic, Rock Physics and Basin Modeling Ulisses T physics, and seismic attributes, including seismic amplitude to match seismic data. Introduction a match to seismic data. In particular, we seek to match not just event timing (phase) but also reflection

  18. The Inverse Variational Problem and Logistic Self-Regulated Systems

    E-Print Network [OSTI]

    A. G. Munoz S.; D. Sierra Porta; T. Soldovieri

    2003-12-10

    There exists in nature many examples of systems presenting self-limiting behaviour: population dynamics, structure engineering, Townsend's electron breakdown, nuclear decay in radioactive equilibrium, histeresis process, meteorological models, etcetera. In this work we call attention to the advantages the use of a variational formulation should provide to the study of self-regulated systems, such as a unified description of the related phenomena, further comprehension of the internal structure and symmetries of the related equations, and the determination of the equilibria points via the energy function. We study the case of logistic systems, obtaining explicitly several s-equivalent Lagrangeans corresponding to the Verhulst's equation. Some dynamical properties are discussed in the light of this approach. Expressions for the mean energy function are also obtained. Keywords: logistic equation, Verhulst's Lagrangean, self-regulated systems. PACS: 02.30.Zz, 45.20.Jj, 87.23.Cc

  19. Optimally robust shortcuts to population inversion in two-level quantum systems

    E-Print Network [OSTI]

    A. Ruschhaupt; Xi Chen; D. Alonso; J. G. Muga

    2012-06-08

    We examine the stability versus different types of perturbations of recently proposed shortcuts-to-adiabaticity to speed up the population inversion of a two-level quantum system. We find optimally robust processes using invariant based engineering of the Hamiltonian. Amplitude noise and systematic errors require different optimal protocols.

  20. Modeling the reactive inorganic solute distributions in the groundwater flow systems of the Hanford Site using inverse analytical modeling techniques 

    E-Print Network [OSTI]

    Adamski, Mark Robert

    1993-01-01

    Inverse analytical techniques were used to model solute distributions and determine transport parameters for two flow systems in the Yakima Basalt subgroup at the Hanford Site in Washington state. Previous studies of these flow systems used...

  1. Observation of transient gain without population inversion in a laser-cooled rubidium lambda system

    E-Print Network [OSTI]

    S. R. de Echaniz; Andrew D. Greentree; A. V. Durrant; D. M. Segal; J. P. Marangos; J. A. Vaccaro

    2001-05-17

    We have observed clear Rabi oscillations of a weak probe in a strongly driven three-level lambda system in laser-cooled rubidium for the first time. When the coupling field is non-adiabatically switched on using a Pockels cell, transient probe gain without population inversion is obtained in the presence of uncoupled absorptions. Our results are supported by three-state computations.

  2. Adaptive dynamic inversion of nonlinear systems subjected to control saturation constraints 

    E-Print Network [OSTI]

    Tandale, Monish Deepak

    2007-09-17

    The adaptive dynamic inversion control methodology uses dynamic inversion to calculate the control, and adaptation to compensate for the errors in the inversion due to model uncertainties. Traditionally, adaptive control assumes full authority...

  3. Joint Environmental Management System (EMS) Declaration of Conformance

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPA Public CommentInverted Attic9: Johnof Energy JoiningJoint

  4. Odd-Parity Superconductivity in the Vicinity of Inversion Symmetry Breaking in Spin-Orbit-Coupled Systems

    E-Print Network [OSTI]

    Kozii, Vladyslav

    We study superconductivity in spin-orbit-coupled systems in the vicinity of inversion symmetry breaking. We find that, because of the presence of spin-orbit coupling, fluctuations of the incipient parity-breaking order ...

  5. Personalisation and Recommender Systems in Digital Joint NSF-EU DELOS Working Group Report

    E-Print Network [OSTI]

    Callan, Jamie

    Personalisation and Recommender Systems in Digital Libraries Joint NSF-EU DELOS Working Group, Ireland Micheline Beaulieu, University of Sheffield, UK Pia Borlund, Royal School of Library, University of Toronto, Canada Digital libraries are collections of information that have associated services

  6. Coordinated joint motion control system with position error correction

    DOE Patents [OSTI]

    Danko, George (Reno, NV)

    2011-11-22

    Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.

  7. Numerical Model of a Tensioner System and Flex Joint 

    E-Print Network [OSTI]

    Huang, Han

    2013-07-27

    D will be integrated into a numerical code, known as COUPLE, for the simulation of the dynamic interaction among the hull of a floating structure, such as SPAR or TLP, its mooring system and riser system under the impact of wind, current and waves...

  8. A Newton-CG Method for Full-Waveform Inversion in a Coupled Solid-Fluid System

    E-Print Network [OSTI]

    Ulbrich, Michael

    help to improve reliable Tsunami warning systems and support the search for natural resourcesA Newton-CG Method for Full-Waveform Inversion in a Coupled Solid-Fluid System Christian Boehm and a preconditioned conjugate gradient method to solve the Newton system in matrix-free fashion. A trust

  9. Joint system quantum descriptions arising from local quantumness

    E-Print Network [OSTI]

    Tom Cooney; Marius Junge; Miguel Navascues; David Perez-Garcia; Ignacio Villanueva

    2012-05-18

    Bipartite correlations generated by non-signalling physical systems that admit a finite-dimensional local quantum description cannot exceed the quantum limits, i.e., they can always be interpreted as distant measurements of a bipartite quantum state. Here we consider the effect of dropping the assumption of finite dimensionality. Remarkably, we find that the same result holds provided that we relax the tensor structure of space-like separated measurements to mere commutativity. We argue why an extension of this result to tensor representations seems unlikely.

  10. Future waste treatment and energy systems – examples of joint scenarios

    SciTech Connect (OSTI)

    Münster, M., E-mail: maem@dtu.dk [System Analysis Division, DTU Management Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde (Denmark); Finnveden, G. [KTH Royal Institute of Technology, School of Architecture and the Built Environment, Department of Planning and Environment, Division of Environmental Strategies Research – fms, 100 44 Stockholm (Sweden); Wenzel, H. [Institute of Chemical Engineering, Biotechnology and Environmental Technology, University of Southern Denmark, Niels Bohrs Allé 1, 5230 Odense M (Denmark)

    2013-11-15

    Highlights: • Approach for use of scenarios dealing with both waste management and energy issues. • Overall scenarios for the common project and sub-scenarios in parts of the project. • Combining different types of scenarios to the tools of different disciplines. • Use of explorative external scenarios based on marginals for consequential LCA. - Abstract: Development and use of scenarios for large interdisciplinary projects is a complicated task. This article provides practical examples of how it has been carried out in two projects addressing waste management and energy issues respectively. Based on experiences from the two projects, recommendations are made for an approach concerning development of scenarios in projects dealing with both waste management and energy issues. Recommendations are given to develop and use overall scenarios for the project and leave room for sub-scenarios in parts of the project. Combining different types of scenarios is recommended, too, in order to adapt to the methods and tools of different disciplines, such as developing predictive scenarios with general equilibrium tools and analysing explorative scenarios with energy system analysis tools. Furthermore, as marginals identified in differing future background systems determine the outcomes of consequential life cycle assessments (LCAs), it is considered advisable to develop and use explorative external scenarios based on possible marginals as a framework for consequential LCAs. This approach is illustrated using an on-going Danish research project.

  11. An inverse method for calculation of thermal inertia and heat gain in air conditioning and refrigeration systems

    E-Print Network [OSTI]

    Bahrami, Majid

    An inverse method for calculation of thermal inertia and heat gain in air conditioning for estimation of thermal inertia and heat gain in air conditioning and refrigeration systems using on Ltd. All rights reserved. 1. Introduction Heating, Ventilation, Air Conditioning, and Refrigeration

  12. Test of J-matrix inverse scattering potentials on electromagnetic reactions of few-nucleon systems

    E-Print Network [OSTI]

    Nir Barnea; Winfried Leidemann; Giuseppina Orlandini

    2006-07-07

    The J-matrix inverse scattering nucleon-nucleon potentials (JISP), describing both two-nucleon data and bound and resonant states of light nuclei to high accuracy, are tested on the total photoabsorption cross sections of Deuteron, Triton, 3He and 4He. The calculations in the three- and four-body systems are carried out via the Lorentz integral transform method and the hyperspherical harmonics (HH) technique. To this end the HH formalism has been adapted to accommodate non-local potentials. The cross sections calculated with the JISP are compared to those obtained with more traditional realistic interactions, which include two- and three-nucleon forces. While the results of the two kinds of potential models do not differ significantly at lower energies, beyond the resonance peak they show fairly large discrepancies, which increase with the nuclear mass. We argue that these discrepancies may be due to a probably incorrect long range behavior of the JISP, since the one pion exchange is not manifestly implemented there.

  13. Measurement of joint kinematics using a conventional clinical single-perspective flat-panel radiography system

    SciTech Connect (OSTI)

    Seslija, Petar; Teeter, Matthew G.; Yuan Xunhua; Naudie, Douglas D. R.; Bourne, Robert B.; MacDonald, Steven J.; Peters, Terry M.; Holdsworth, David W.

    2012-10-15

    Purpose: The ability to accurately measure joint kinematics is an important tool in studying both normal joint function and pathologies associated with injury and disease. The purpose of this study is to evaluate the efficacy, accuracy, precision, and clinical safety of measuring 3D joint motion using a conventional flat-panel radiography system prior to its application in an in vivo study. Methods: An automated, image-based tracking algorithm was implemented to measure the three-dimensional pose of a sparse object from a two-dimensional radiographic projection. The algorithm was tested to determine its efficiency and failure rate, defined as the number of image frames where automated tracking failed, or required user intervention. The accuracy and precision of measuring three-dimensional motion were assessed using a robotic controlled, tibiofemoral knee phantom programmed to mimic a subject with a total knee replacement performing a stair ascent activity. Accuracy was assessed by comparing the measurements of the single-plane radiographic tracking technique to those of an optical tracking system, and quantified by the measurement discrepancy between the two systems using the Bland-Altman technique. Precision was assessed through a series of repeated measurements of the tibiofemoral kinematics, and was quantified using the across-trial deviations of the repeated kinematic measurements. The safety of the imaging procedure was assessed by measuring the effective dose of ionizing radiation associated with the x-ray exposures, and analyzing its relative risk to a human subject. Results: The automated tracking algorithm displayed a failure rate of 2% and achieved an average computational throughput of 8 image frames/s. Mean differences between the radiographic and optical measurements for translations and rotations were less than 0.08 mm and 0.07 Degree-Sign in-plane, and 0.24 mm and 0.6 Degree-Sign out-of-plane. The repeatability of kinematics measurements performed using the radiographic tracking technique was better than {+-}0.09 mm and 0.12 Degree-Sign in-plane, and {+-}0.70 mm and {+-}0.07 Degree-Sign out-of-plane. The effective dose associated with the imaging protocol used was 15 {mu}Sv for 10 s of radiographic cine acquisition. Conclusions: This study demonstrates the ability to accurately measure knee-joint kinematics using a single-plane radiographic measurement technique. The measurement technique can be easily implemented at most clinical centers equipped with a modern-day radiographic x-ray system. The dose of ionizing radiation associated with the image acquisition represents a minimal risk to any subjects undergoing the examination.

  14. Simulation of Tactical Communications Systems by Inferring Detailed Data from the Joint Theater Level Computer Aided Exercises

    E-Print Network [OSTI]

    1 Simulation of Tactical Communications Systems by Inferring Detailed Data from the Joint Theater@boun.edu.tr Abstract - In this paper, a new scheme for the simulation of tactical communications systems is introduced communications system studied by using our technique, and example results from this study are also presented

  15. Inverted approach to the inverse scattering problem: complete solution of the Marchenko equation for a model system

    E-Print Network [OSTI]

    Matti Selg

    2015-01-17

    An example of full solution of the inverse scattering problem on the half line is presented. For this purpose, a simple analytically solvable model system (Morse potential) is used, which is expected to be a reasonable approximation to a real potential. First one calculates all spectral characteristics for the fixed model system. This way one gets all the necessary input data (otherwise unobtainable) to implement powerful methods of the inverse scattering theory. In this paper, the multi-step procedure to solve the Marchenko integral equation is described in full details. Excellent performance of the method is demonstrated and its combination with the Marchenko differential equation is discussed. In addition to the main results, several important analytic properties of the Morse potential are unveiled. For example, a simple analytic algorithm to calculate the phase shift is derived.

  16. The cost of Jointness : insights from environmental monitoring systems in low Earth orbit

    E-Print Network [OSTI]

    Dwyer, Morgan Maeve

    2015-01-01

    The term jointness refers to activities or operations that are executed collaboratively by more than one government agency or military department. While joint operations have become increasingly common and successful, the ...

  17. Recommendation systems: a joint analysis of technical aspects with marketing implications

    E-Print Network [OSTI]

    Michalis, Vafopoulos

    2011-01-01

    In 2010, Web users ordered, only in Amazon, 73 items per second and massively contribute reviews about their consuming experience. As the Web matures and becomes social and participatory, collaborative filters are the basic complement in searching online information about people, events and products. In Web 2.0, what connected consumers create is not simply content (e.g. reviews) but context. This new contextual framework of consumption emerges through the aggregation and collaborative filtering of personal preferences about goods in the Web in massive scale. More importantly, facilitates connected consumers to search and navigate the complex Web more effectively and amplifies incentives for quality. The objective of the present article is to jointly review the basic stylized facts of relevant research in recommendation systems in computer and marketing studies in order to share some common insights. After providing a comprehensive definition of goods and Users in the Web, we describe a classification of reco...

  18. Integrated Microbial Genomes (IMG) System from the DOE Joint Genome Institute (JGI)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The integrated microbial genomes (IMG) system is a data management, analysis and annotation platform for all publicly available genomes. IMG contains both draft and complete JGI microbial genomes integrated with all other publicly available genomes from all three domains of life, together with a large number of plasmids and viruses. IMG provides tools and viewers for analyzing and annotating genomes, genes and functions, individually or in a comparative context. Since its first release in 2005, IMG's data content and analytical capabilities have been constantly expanded through quarterly releases. IMG is provided by the DOE-Joint Genome Institute (JGI) and is available from http://img.jgi.doe.gov. [Abstract from The integrated microbial genomes (IMG) system in 2007: data content and analysis tool extensions; Victor M. Markowitz, Ernest Szeto, Krishna Palaniappan, Yuri Grechkin, Ken Chu, I-Min A. Chen, Inna Dubchak, Iain Anderson, Athanasios Lykidis, Konstantinos Mavromatis, Natalia N. Ivanova and Nikos C. Kyrpides; Nucleic Acids Research, 2008, Vol. 36. (Database Issue) See also the companion system, Integrated Microbial Genomes with Microbiome Samples.

  19. SU-E-T-555: A Protontherapy Inverse Treatment Planning System Prototype with Linear Energy Transfer (LET) Optimization

    SciTech Connect (OSTI)

    Sanchez-Parcerisa, D; Carabe-Fernandez, A

    2014-06-01

    Purpose: Develop and benchmark an inverse treatment planning system (TPS) for proton radiotherapy integrating fast analytical dose and LET calculations in patient geometries and a dual objective function with both dose and LET components, enabling us to apply optimization techniques to improve the predicted outcome of treatments based on radiobiological models. Methods: The software package was developed in MATLAB and implements a fluence-dose calculation technique based on a pencil beam model for dose calculations and a 3D LET model based on the extension of the LET in the radial direction as a function of the predicted radiological pathway. Both models were benchmarked against commissioning data from our institution, dose calculations performed with a commercial treatment planning system and Monte Carlo simulations. The optimization is based on the adaptive simulated annealing approach . Results: The dose and LET calculations were tested in a water phantom and several real patient treatments. The pass rate for the gamma index analysis (3%/3mm) test was above 90% for all test cases analyzed, and the calculation time was of the order of seconds. The inverse planning module produced plans with a significantly higher mean LET in the target compared to traditional plans, without any loss of target coverage. The clinical relevance of this improvement is under consideration . Conclusion: The developed treatment planning system is a valuable clinical and research tool that enables us to incorporate LET effects into proton radiotherapy planning in a streamlined fashion.

  20. Stochastic Joint Inversion for Integrated Data Interpretation...

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

    hydrothermal | geothermal 2015 peer review Imaging, Characterizing, and Modeling of Fracture Networks and Fluid Flow in EGS Reservoirs Use of Geophysical Techniques to...

  1. Dark matter vs. modifications of the gravitational inverse-square law. Results from planetary motion in the solar system

    E-Print Network [OSTI]

    M. Sereno; Ph. Jetzer

    2006-06-08

    Dark matter or modifications of the Newtonian inverse-square law in the solar-system are studied with accurate planetary astrometric data. From extra-perihelion precession and possible changes in the third Kepler's law, we get an upper limit on the local dark matter density, rho_{DM} gravitational acceleration are really small. We examined the MOND interpolating function mu in the regime of strong gravity. Gradually varying mu suggested by fits of rotation curves are excluded, whereas the standard form mu(x)= x/(1+x^2)^{1/2} is still compatible with data. In combination with constraints from galactic rotation curves and theoretical considerations on the external field effect, the absence of any significant deviation from inverse square attraction in the solar system makes the range of acceptable interpolating functions significantly narrow. Future radio ranging observations of outer planets with an accuracy of few tenths of a meter could either give positive evidence of dark matter or disprove modifications of gravity.

  2. The CAFE experiment : a joint seismic and MT investigation of the Cascadia subduction system

    E-Print Network [OSTI]

    McGary, R. Shane

    2013-01-01

    In this thesis we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic ...

  3. Joint-Frequency Bins versus Conventional Bin Weather Data in Analysis of HVAC System Operation 

    E-Print Network [OSTI]

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

    2009-01-01

    Often in simplified energy analysis the use of bin weather data is employed for a more time efficient and better organized analysis than using the full 8760-hour annual weather data. It has been suggested that joint-frequency bins be used instead...

  4. Strength of joints produced by transient liquid phase bonding in the CuSn system

    E-Print Network [OSTI]

    Zok, Frank

    ; Intermetallic phases; Electron beam methods; Fracture; Toughness 1. Introduction Transient liquid phase (TLP focuses on the strength and toughness of joints produced by transient liquid phase (TLP) bonding in the Cu the d-phase and a dispersion of ductile (Cu) particles, and a uniform Cu solid solution. Notched

  5. K-space reconstruction of magnetic resonance inverse imaging (K-InI) of human visuomotor systems

    E-Print Network [OSTI]

    MRI InI Visual MRI Neuroimaging K-InI Inverse solution MEG EEG Electroencephalography channels of a radio-frequency coil array, magnetic resonance inverse imaging (InI) can achieve ultra. Mathematically, the InI reconstruction is a generalization of parallel MRI (pMRI), which includes image space

  6. Approximation and inversion of a complex meteorological system via local linear filters

    E-Print Network [OSTI]

    Schoenberg, Frederic Paik (Rick)

    been the site of some of the nation's most severe air pollution (Lu et al., 1997b). In order to model to a complex mul- tivariate dynamic model for Southern California air quality is given and the method is shown, simulate, and predict levels of ozone and other pollutants, a multivariate dynamic modeling system called

  7. Real-time environmental inversion using a network of light receiving systems

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    of the Acoustic Oceano- graphic Buoy (AOB) [4], which uses a surface buoy and an underwater array of acoustic the surface buoy includes a digital storage unit for the acquired data, a wireless communications system as the data can be transferred from the buoy to a platform equipped with processing capabilities before

  8. An inverse problem for a dynamical Lame system with residual stress

    E-Print Network [OSTI]

    Isakov, Victor

    assumptions exclude zero initial data (most natural in many applications), recent progress in generating wave, University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153- 8914, Japan. Email:myama@ms.u-tokyo.ac.jp 1 #12;compression waves in unperturbed system satisfy some pseudoconvexity type condi- tions (which exclude trapped

  9. Ceramic joints

    DOE Patents [OSTI]

    Miller, Bradley J. (Worcester, MA); Patten, Jr., Donald O. (Sterling, MA)

    1991-01-01

    Butt joints between materials having different coefficients of thermal expansion are prepared having a reduced probability of failure of stress facture. This is accomplished by narrowing/tapering the material having the lower coefficient of thermal expansion in a direction away from the joint interface and not joining the narrow-tapered surface to the material having the higher coefficient of thermal expansion.

  10. Longevity of Duct Tape in Residential Air Distribution Systems: 1-D, 2-D, and 3-D Joints 

    E-Print Network [OSTI]

    Abushakra, B.

    2003-01-01

    . The study concluded that the duct tape performance in sealing joints depends on the joint's space dimensions; it gets worse as the number of dimensions required to describe the joint increases (1-D to 3-D). This is essentially caused by the shrinkage...

  11. Survey of tracking systems and rotary joints for coolant piping. Final report, August 15, 1978-August 14, 1978. [Includes patents

    SciTech Connect (OSTI)

    Furaus, J P; Gruchalla, M E; Sower, G D

    1980-01-01

    Problems were surveyed and evaluated with respect to solar tracking mechanisms and rotary joints for coolant piping. An analytical development of celestial mechanics, one- and two-axis tracking configurations and the effect of tracking accuracy versus collector efficiency are reported. Daily operational requirements and tracking modes were defined and evaluated. A literature and patent search on solar tracking technology was performed. Tracking system and control system performance specifications were determined. Alternative conceptual tracking approaches were defined and a cost and performance evaluation of a mechanical tracking concept was performed. Fluid coupling service specifications were determined. The cost and performance of several types of actuators and error detectors were evaluated with respect to solar tracking mechanisms.

  12. The importance of nonlinear fluid response in joint density-functional theory studies of battery systems

    E-Print Network [OSTI]

    Gunceler, Deniz; Sundararaman, Ravishankar; Schwarz, Kathleen A; Arias, T A

    2013-01-01

    Delivering the full benefits of first principles calculations to battery materials demands the development of accurate and computationally-efficient electronic structure methods that incorporate the effects of the electrolyte environment and electrode potential. Realistic electrochemical interfaces containing polar surfaces are beyond the regime of validity of existing continuum solvation theories developed for molecules, due to the presence of significantly stronger electric fields. We present an ab initio theory of the nonlinear dielectric and ionic response of solvent environments within the framework of joint density-functional theory, with precisely the same optimizable parameters as conventional polarizable continuum models. We demonstrate that the resulting nonlinear theory agrees with the standard linear models for organic molecules and metallic surfaces under typical operating conditions. However, we find that the saturation effects in the rotational response of polar solvent molecules, inherent to o...

  13. High-resolution reservoir characterization by an acoustic impedance inversion of a Tertiary deltaic clinoform system in the North Sea

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    process and thereby com- plement the relatively dense horizontal coverage of seismic data with high ones encountered in the subsurface, and potential reservoir units are often close to or below seismic resolution. For seismic inversion, it is therefore important to integrate the seismic data with higher

  14. Proceedings of the joint contractors meeting: FE/EE Advanced Turbine Systems conference FE fuel cells and coal-fired heat engines conference

    SciTech Connect (OSTI)

    Geiling, D.W.

    1993-08-01

    The joint contractors meeting: FE/EE Advanced Turbine Systems conference FEE fuel cells and coal-fired heat engines conference; was sponsored by the US Department of Energy Office of Fossil Energy and held at the Morgantown Energy Technology Center, P.O. Box 880, Morgantown, West Virginia 26507-0880, August 3--5, 1993. Individual papers have been entered separately.

  15. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

    1991-01-01

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

  16. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, J.V.; Novak, R.F.; McBride, J.R.

    1991-08-27

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system. 11 figures.

  17. Service Level Agreement-Based Joint Application Environment Assignment and Resource Allocation in Cloud Computing Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    in Cloud Computing Systems Yanzhi Wang, Shuang Chen and Massoud Pedram Department of Electrical Engineering and storage. Resource allocation is one of the most important challenges in the cloud computing system algorithms by up to 65.7%. Keywords-cloud computing; application environment; resource allocation; assignment

  18. Achieving Energy Performance in spite of complex systems and dis-jointed design 

    E-Print Network [OSTI]

    Ardren, C.; Bannister, P.

    2012-01-01

    to a bare shell, before being re-created to a Grade A office with numerous tenant systems, including a 125kW data centre with a series of complex multi-layered alarm and protection systems. Given the extent of incomplete or contradictory designs...

  19. Joint Durability The problem?

    E-Print Network [OSTI]

    Permeability #12;An Example #12;So · Water has to be prevented from saturating the concrete · Prevent water from ponding in the joint · Prevent water from penetrating from the base · Permeability of the concrete should be as low as practically feasible · The air void system in the in-place concrete must be adequate

  20. Locative Inversion In Cantonese

    E-Print Network [OSTI]

    Mok, Sui-Sang

    1992-01-01

    This paper proposes that locative inversion is a widespread syntactic process in Cantonese. The sentence-initial locative phrases in the Locative Inversion sentences are argued to be subjects which come from the postverbal complement position...

  1. Shock transmissibility of threaded joints

    SciTech Connect (OSTI)

    Hansen, N.R.; Bateman, V.I.; Brown, F.A.

    1996-12-31

    Sandia National Laboratories (SNL) designs mechanical systems with threaded joints that must survive high shock environments. These mechanical systems include penetrators that must survive soil and rock penetration; drilling pipe strings that must survive rock-cutting, shock environments; and laydown weapons that must survive delivery impact shock. This paper summarizes an analytical study and an experimental evaluation of compressive, one-dimensional, shock transmission through a threaded joint in a split Hopkinson bar configuration. Thread geometries were scaled to simulate large diameter threaded joints with loadings parallel to the axis of the threads. Both strain and acceleration were evaluated with experimental measurements and analysis. Analytical results confirm the experimental conclusions that in this split Hopkinson bar configuration, the change in the one-dimensional shock wave by the threaded joint is localized to a length equal to a few diameters` length beyond the threaded joint.

  2. Azimuthal reflectivity inversion

    E-Print Network [OSTI]

    mshepher

    2012-10-30

    simultaneous isotropic elastic inversion of Coulon et al. (2006). ... focus on unconventional reservoirs. ... fracture parameters and velocities based on azimuthal.

  3. Wavelet Domain Geophysical Inversion

    E-Print Network [OSTI]

    Kane, Jonathan

    2002-01-01

    We present a non-linear method for solving linear inverse problems by thresholding coefficients in the

  4. Geophysical InversionFacility

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    UBC Geophysical InversionFacility Modelling and Inversion of EMI data collected over magnetic soils of EMI data acquired at sites with magnetic soils · Geophysical Proveouts · Geonics EM63 Data · First model parameters: · Location · Orientation · Polarizabilities 4 #12;UBC Geophysical Inversion Facility

  5. Control method and system for hydraulic machines employing a dynamic joint motion model

    DOE Patents [OSTI]

    Danko, George (Reno, NV)

    2011-11-22

    A control method and system for controlling a hydraulically actuated mechanical arm to perform a task, the mechanical arm optionally being a hydraulically actuated excavator arm. The method can include determining a dynamic model of the motion of the hydraulic arm for each hydraulic arm link by relating the input signal vector for each respective link to the output signal vector for the same link. Also the method can include determining an error signal for each link as the weighted sum of the differences between a measured position and a reference position and between the time derivatives of the measured position and the time derivatives of the reference position for each respective link. The weights used in the determination of the error signal can be determined from the constant coefficients of the dynamic model. The error signal can be applied in a closed negative feedback control loop to diminish or eliminate the error signal for each respective link.

  6. Braze system and method for reducing strain in a braze joint

    DOE Patents [OSTI]

    Cadden, Charles H.; Goods, Steven H.; Prantil, Vincent C.

    2004-05-11

    A system for joining a pair of structural members having widely differing coefficients of thermal expansion is disclosed. A mechanically "thick" foil is made by dispersing a refractory metal powder, such as molybdenum, niobium, tantalum, or tungsten into a quantity of a liquid, high expansion metal such as copper, silver, or gold, casting an ingot of the mixture, and then cutting sections of the ingot about 1 mm thick to provide the foil member. These foil members are shaped, and assembled between surfaces of structural members for joining, together with a layer of a braze alloy on either side of the foil member capable of wetting both the surfaces of the structural members and the foil. The assembled body is then heated to melt the braze alloy and join the assembled structure. The foil member subsequently absorbs the mechanical strain generated by the differential contraction of the cooling members that results from the difference in the coefficients of thermal expansion of the members.

  7. High-resolution reservoir characterization by 2-D model-driven seismic Bayesian inversion: an example from a Tertiary deltaic clinoform system in the North Sea

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    that is then iteratively matched with the seismic data using a Bayesian inversion process. The inversion is then extendedHigh-resolution reservoir characterization by 2-D model-driven seismic Bayesian inversion-resolution reservoir model from seismic and well data, an approach was developed based on an a priori layered model

  8. Constraints on the range lambda of Yukawa-like modifications to the Newtonian inverse-square law of gravitation from Solar System planetary motions

    E-Print Network [OSTI]

    Lorenzo Iorio

    2007-09-25

    In this paper we use the latest corrections to the Newton-Einstein secular perihelion rates of some planets of the Solar System, phenomenologically estimated with the EPM2004 ephemerides by the Russian astronomer E.V. Pitjeva, to put severe constraints on the range parameter lambda characterizing the Yukawa-like modifications of the Newtonian inverse-square law of gravitation. It turns out that the range cannot exceed about one tenth of an Astronomical Unit. We assumed neither equivalence principle violating effects nor spatial variations of $\\alpha$ and $\\lambda$. This finding may have important consequences on all the modified theories of gravity involving Yukawa-type terms with range parameters much larger than the Solar System size. However, caution is advised since we, currently have at our disposal only the periehlion extra-rates estimated by Pitjeva: if and when other groups will estimate their own corrections to the secular motion of perihelia, more robust and firm tests may be conducted.

  9. DEVELOPMENT, INSTALLATION AND OPERATION OF THE MPC&A OPERATIONS MONITORING (MOM) SYSTEM AT THE JOINT INSTITUTE FOR NUCLEAR RESEARCH (JINR) DUBNA, RUSSIA

    SciTech Connect (OSTI)

    Kartashov,V.V.; Pratt,W.; Romanov, Y.A.; Samoilov, V.N.; Shestakov, B.A.; Duncan, C.; Brownell, L.; Carbonaro, J.; White, R.M.; Coffing, J.A.

    2009-07-12

    The Material Protection, Control and Accounting (MPC&A) Operations Monitoring (MOM) systems handling at the International Intergovernmental Organization - Joint Institute for Nuclear Research (JINR) is described in this paper. Category I nuclear material (plutonium and uranium) is used in JINR research reactors, facilities and for scientific and research activities. A monitoring system (MOM) was installed at JINR in April 2003. The system design was based on a vulnerability analysis, which took into account the specifics of the Institute. The design and installation of the MOM system was a collaborative effort between JINR, Brookhaven National Laboratory (BNL) and the U.S. Department of Energy (DOE). Financial support was provided by DOE through BNL. The installed MOM system provides facility management with additional assurance that operations involving nuclear material (NM) are correctly followed by the facility personnel. The MOM system also provides additional confidence that the MPC&A systems continue to perform effectively.

  10. On the formation of energy spectra of synchrotron X-rays and inverse Compton gamma-rays in binary systems with luminous optical stars

    E-Print Network [OSTI]

    D. Khangulyan; F. Aharonian

    2005-03-23

    In this paper we study formation broad band energy spectra of electrons due to synchrotron radiation and inverse Compton (IC) scattering. The effect of transition of IC cooling from the Thomson regime to the Klein-Nishina regime can be very significant in the environments where radiation density dominates over the magnetic field density. We discuss impact of this effect on the formation of synchrotron and IC radiation components of TeV electrons in binary systems with very luminous optical stars. Such a scenario can be realized, for example, at the wind termination shock of the pulsar in PSR B1259-63/SS2883 or in the jets of microquasars. The calculations are based on the solution of Boltzmann equation using precise differential Compton cross-section.

  11. Inverse Stochastic Linear Programming

    E-Print Network [OSTI]

    2007-01-05

    Keywords: Inverse Optimization, Stochastic Programming, Decomposition ..... i ) i = q + 1,··· , r. (29) .... Royal Statistical Society, Series B, 17 (1955) 173–184.

  12. Two-dimensional magnetohydrodynamic liner-on-plasma simulations for the compression phase of a magnetized target fusion system based on inverse Z pinch

    SciTech Connect (OSTI)

    Subhash, P. V.; Madhavan, S.; Chaturvedi, S. [Institute for Plasma Research, Bhat, Gandhinagar-382 428, Gujarat (India)

    2006-07-15

    This article reports, for the first time, two-dimensional magnetohydrodynamic liner-on-plasma simulations for the compression phase of a magnetized target fusion (MTF) system with an inverse Z-pinch target. These simulations evolve the complete liner-plasma system along with the driving pulsed-power source. First, it has been demonstrated that closely coupled liner-on-plasma simulations produce results that are significantly different from loosely coupled simulations that have been reported in the literature. Second, it has been found that an initially stable plasma, satisfying the Kadomtsev criteria, and with a small initial pressure perturbation in the axial direction, remains stable all through the compression phase, even though there are large changes in the pressure and magnetic field levels. Third, a plasma that violates the Kadomtsev criteria, even by a small amount, turns out to be unstable, as predicted by theory. In practical terms, this means that it is preferable to stay well away from the stability limit, even at the cost of some reduction of initial plasma pressure. Fourth, even during the burn phase, when there is a large and rapid increase in plasma pressure due to fusion energy deposition, an initially stable plasma generally tends to remain stable, and even improves its stability margin. This observation shows that the inverse Z pinch is fairly benign as a MTF target, as an initially stable plasma remains stable during both the compression and burn phases. Fifth, certain unusual features are observed in the temperature profile--these depend upon the time scale for implosion. This has implications for plasma-surface interactions at the liner and central conductor.

  13. Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergyPlan | Department of Energy 1 DOE| DepartmentHigh Impact

  14. Joint inversion in coupled quasi-static poroelasticity (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journalspectroscopy of aerosols in(JournalTechnical Report:ConnectSciTech

  15. Regularizing Inverse Problems 

    E-Print Network [OSTI]

    Wang, Fang

    2014-06-26

    inverse problem to optimization problems of minimizing the norm of the data misfit plus a weighted regularization functional that incorporates the a priori information we may have about the original problem. The choices of the regularization functional r(q...

  16. Risk Management Institute Joint Seminar Joint Seminar -

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    Risk Management Institute Joint Seminar Joint Seminar - Risk Management Institute And Department A (S14, #03-10) Speaker Prof. Wang Hefei University of Illinois, Chicago Title Leverage Management Abstract Leverage has often aggravated losses to managed investments. The recent collapses of hedge funds

  17. Jointly Sponsored Research Program

    SciTech Connect (OSTI)

    Everett A. Sondreal; John G. Hendrikson; Thomas A. Erickson

    2009-03-31

    U.S. Department of Energy (DOE) Cooperative Agreement DE-FC26-98FT40321 funded through the Office of Fossil Energy and administered at the National Energy Technology Laboratory (NETL) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy & Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying highly efficient, nonpolluting energy systems that meet the nation's requirements for clean fuels, chemicals, and electricity in the 21st century. The EERC in partnership with its nonfederal partners jointly performed 131 JSRP projects for which the total DOE cost share was $22,716,634 (38%) and the nonfederal share was $36,776,573 (62%). Summaries of these projects are presented in this report for six program areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, and (6) advanced materials. The work performed under this agreement addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration; near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources.

  18. 2014 Joint Action Workshop

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Joint Action Workshop is an annual event for joint action agencies and their members to meet informally and discuss emerging policy, regulatory, and power supply issues, and other topics...

  19. Large displacement spherical joint

    DOE Patents [OSTI]

    Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

    2002-01-01

    A new class of spherical joints has a very large accessible full cone angle, a property which is beneficial for a wide range of applications. Despite the large cone angles, these joints move freely without singularities.

  20. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 51, NO. 3, MARCH 2004 539 Power System Modeling for Inverse Problems

    E-Print Network [OSTI]

    [1], tap-changing transformers [2], power electronic switches [3] and supervisory control [4]. Limits of power systems. At the market layer, for example, system measurements and participant inputs are interpreted in terms of market rules to generate events that affect the physical system. In all cases, discret

  1. Pointwise Fourier Inversion: a Wave Equation Approach

    E-Print Network [OSTI]

    Pointwise Fourier Inversion: a Wave Equation Approach Mark A. Pinsky1 Michael E. Taylor2. A general criterion for pointwise Fourier inversion 2. Pointwise Fourier inversion on Rn (n = 3) 3. Fourier inversion on R2 4. Fourier inversion on Rn (general n) 5. Fourier inversion on spheres 6. Fourier inversion

  2. Structure of Laminar Sooting Inverse Diffusion Flames

    E-Print Network [OSTI]

    Mikofski, Mark A

    2007-01-01

    Combust. Structure of Laminar Sooting Inverse Diffusion2002, p. 252. Structure of Laminar Sooting Inverse Diffusion219-226. Structure of Laminar Sooting Inverse Diffusion

  3. Robust inversion for UXO discrimination

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    1 Robust inversion for UXO discrimination Laurens Beran, Stephen Billings, Doug Oldenburg and discrimination performance Estimating standard deviations from the data is an important step for inversion of TEM discrimination. Lin Ping Song, Len Pasion, Nicolas Lhomme #12;

  4. Information basis for developing comprehensive waste management system-US-Japan joint nuclear energy action plan waste management working group phase I report.

    SciTech Connect (OSTI)

    Nutt, M.; Nuclear Engineering Division

    2010-05-25

    The activity of Phase I of the Waste Management Working Group under the United States - Japan Joint Nuclear Energy Action Plan started in 2007. The US-Japan JNEAP is a bilateral collaborative framework to support the global implementation of safe, secure, and sustainable, nuclear fuel cycles (referred to in this document as fuel cycles). The Waste Management Working Group was established by strong interest of both parties, which arise from the recognition that development and optimization of waste management and disposal system(s) are central issues of the present and future nuclear fuel cycles. This report summarizes the activity of the Waste Management Working Group that focused on consolidation of the existing technical basis between the U.S. and Japan and the joint development of a plan for future collaborative activities. Firstly, the political/regulatory frameworks related to nuclear fuel cycles in both countries were reviewed. The various advanced fuel cycle scenarios that have been considered in both countries were then surveyed and summarized. The working group established the working reference scenario for the future cooperative activity that corresponds to a fuel cycle scenario being considered both in Japan and the U.S. This working scenario involves transitioning from a once-through fuel cycle utilizing light water reactors to a one-pass uranium-plutonium fuel recycle in light water reactors to a combination of light water reactors and fast reactors with plutonium, uranium, and minor actinide recycle, ultimately concluding with multiple recycle passes primarily using fast reactors. Considering the scenario, current and future expected waste streams, treatment and inventory were discussed, and the relevant information was summarized. Second, the waste management/disposal system optimization was discussed. Repository system concepts were reviewed, repository design concepts for the various classifications of nuclear waste were summarized, and the factors to consider in repository design and optimization were then discussed. Japan is considering various alternatives and options for the geologic disposal facility and the framework for future analysis of repository concepts was discussed. Regarding the advanced waste and storage form development, waste form technologies developed in both countries were surveyed and compared. Potential collaboration areas and activities were next identified. Disposal system optimization processes and techniques were reviewed, and factors to consider in future repository design optimization activities were also discussed. Then the potential collaboration areas and activities related to the optimization problem were extracted.

  5. Using inverse scattering methods to study inter-nucleus potentials

    E-Print Network [OSTI]

    R S Mackintosh; S G Cooper

    1998-03-05

    It is now straightforward to carry out S-matrix to potential inversion over a very wide range of energies and for a wide range of projectile-target combinations. Inversion is possible in many cases involving spin. IP inversion also permits direct scattering data-to-potential inversion and furnishes powerful tools for the phenomenological analysis of nuclear scattering. The resulting single particle potentials exhibit various generic properties which challenge fundamental reaction theories as well as yield information on densities, provide input for reaction calculations. S-matrix to potential inversion is also a powerful tool for directly investigating theoretical processes which contribute to inter-nuclear potentials. Various studies have given insight into contributions to the dynamic polarisation potential (DPP) due to breakup processes and due to collective and reaction channel coupling and have also illuminated the role played by exchange processes in leading to non-locality and parity dependence of the potentials. A case study involving d + He-4 is a model for ways in which inversion applied jointly to theory and experiment might illuminate the scattering of exotic nuclei.

  6. INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION

    E-Print Network [OSTI]

    Halligan, Daniel

    INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION AND TIE KNOTS Thomas M. A. Fink st. john Introduction 3 1.1 Inverse Protein Folding 3 1.2 Hierarchical Optimisation 5 1.3 Tie Knots 6 1.4 Schematic Organisation 6 1.5 Publications 9 2 Protein Folding, Inverse Protein Folding and Energy Landscapes 10 2

  7. 7, 1043910465, 2007 Mesoscale inversion

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 7, 10439­10465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract Introduction Discussions Mesoscale inversion: first results from the CERES campaign with synthetic data T. Lauvaux 1,2 , M.lauvaux@lsce.ipsl.fr) 10439 #12;ACPD 7, 10439­10465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract

  8. A wideband high dynamic range frequency hopping hardware front-end for the joint tactical radio system

    E-Print Network [OSTI]

    Arriagada, Anton

    2010-01-01

    Radio System – Connecting the GIG to the Tactical Edge” IEEEGrounded Coplanar Waveguide GIG Global Information Grid I/Qthe Global Information Grid (GIG). The interoperability of a

  9. Mesozoic tectonic inversion in the Neuquen Basin of west-central Argentina 

    E-Print Network [OSTI]

    Grimaldi Castro, Gabriel Orlando

    2007-04-25

    Mesozoic tectonic inversion in the Neuquen Basin of west-central Argentina produced two main fault systems: (1) deep faults that affected basement and syn-rift strata where preexisting faults were selectively reactivated during inversion based...

  10. Inverses of Multivariate Polynomial Matrices using Discrete Convolution

    E-Print Network [OSTI]

    Young, R. Michael

    Inverses of Multivariate Polynomial Matrices using Discrete Convolution R. Lobo Dept. of Elec Raleigh, NC 27695 Abstract-- A new method for inversion of rectangular matrices in a multivariate to multivariate polynomial system of equations is the subject of intensive research and has major applications

  11. Linear Models Joint Likelihood

    E-Print Network [OSTI]

    Penny, Will

    Hierarchy Will Penny Linear Models Joint Likelihood First Layer Activity Predictive Coding Update Update Connectivity References Hierarchy Will Penny 24th March 2011 #12;Hierarchy Will Penny Linear x1 = W2x2 + e2 #12;Hierarchy Will Penny Linear Models Joint Likelihood First Layer Activity

  12. Fast Hadamard transforms for compressive sensing of joint systems: measurement of a 3.2 million-dimensional bi-photon probability distribution

    E-Print Network [OSTI]

    Daniel J. Lum; Samuel H. Knarr; John C. Howell

    2015-07-24

    We demonstrate how to efficiently implement extremely high-dimensional compressive imaging of a bi-photon probability distribution. Our method uses fast-Hadamard-transform Kronecker-based compressive sensing to acquire the joint space distribution. We list, in detail, the operations necessary to enable fast-transform-based matrix-vector operations in the joint space to reconstruct a 16.8 million-dimensional image in less than 10 minutes. Within a subspace of that image exists a 3.2 million-dimensional bi-photon probability distribution. In addition, we demonstrate how the marginal distributions can aid in the accuracy of joint space distribution reconstructions.

  13. CHARACTERIZATION OF DAMPING IN BOLTED LAP JOINTS

    SciTech Connect (OSTI)

    C. MALONEY; D. PEAIRS; ET AL

    2000-08-01

    The dynamic response of a jointed beam was measured in laboratory experiments. The data were analyzed and the system was mathematically modeled to establish plausible representations of joint damping behavior. Damping is examined in an approximate, local linear framework using log decrement and half power bandwidth approaches. in addition, damping is modeled in a nonlinear framework using a hybrid surface irregularities model that employs a bristles-construct. Experimental and analytical results are presented.

  14. THE APPLICATIONS FOR 3D INVERSE OPAL MICROSTRUCTURES TAE WAN KIM

    E-Print Network [OSTI]

    Braun, Paul

    THE APPLICATIONS FOR 3D INVERSE OPAL MICROSTRUCTURES BY TAE WAN KIM THESIS Submitted-D micro structures applications, and in particular 3-D inverse opal micro structures made using structures. This inverse opal micro structure can not only be used for micro electromechanical systems (MEMS

  15. Simultaneous Inversion of Production Data and Seismic Attributes: Application to a Synthetic

    E-Print Network [OSTI]

    Boyer, Edmond

    Simultaneous Inversion of Production Data and Seismic Attributes: Application to a Synthetic SAGD and Seismic Attributes: Application to a Synthetic SAGD Produced Field Case -- The joint use of production such as facies, porosity and permeability into reservoirs from production data and seismic attributes

  16. Inverse Spectral Problem Proof of Main Result

    E-Print Network [OSTI]

    Stanhope, Liz

    Inverse Spectral Problem Proof of Main Result Geodesics on Weighted Projective Spaces Zuoqin Wang of Main Result Inverse Spectral Geometry Main Result Inverse Spectral Geometry Manifold setting: (M, g Proof of Main Result Inverse Spectral Geometry Main Result Inverse Spectral Geometry Manifold setting

  17. High pressure ceramic joint

    DOE Patents [OSTI]

    Ward, Michael E. (Poway, CA); Harkins, Bruce D. (San Diego, CA)

    1993-01-01

    Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures.

  18. High pressure ceramic joint

    DOE Patents [OSTI]

    Ward, M.E.; Harkins, B.D.

    1993-11-30

    Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures. 4 figures.

  19. MOSFET Operation in Weak and Moderate Inversion R.R. Harrison The MOS Transistor in Weak Inversion

    E-Print Network [OSTI]

    Harrison, Reid R.

    exponentially with decreasing gate voltage. Depletion Weak inversion Moderate inversion Strong inversion VGB VT0 axis: Weak inversion Moderate inversion Strong inversion VGB VT0 QI = -Cox(VGB ­ VT0) log |QI| QI -exp(VGB

  20. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request/DD/YY): __________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  1. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request: __________________________________________________________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  2. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request/DD/YY): ________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  3. Inverse Freezing in Mean-Field Models of Fragile Glasses

    E-Print Network [OSTI]

    Mauro Sellitto

    2006-05-25

    A disordered spin model suitable for studying inverse freezing in fragile glass-forming systems is introduced. The model is a microscopic realization of the ``random-first order'' scenario in which the glass transition can be either continuous or discontinuous in thermodynamic sense. The phase diagram exhibits a first-order transition line between two fluid phases terminating at a critical point. When the interacting degrees of freedom are entropically favoured an inverse static glass transition and a double inverse dynamic freezing appear.

  4. Robust inversion, dimensionality reduction, and randomized sampling

    E-Print Network [OSTI]

    2011-11-17

    Nov 16, 2011 ... data and yield coherent geological information. Inverse problems .... Our aim is to characterize the benefits of robust inversion and to describe.

  5. Tomographic inversion techniques incorporating physical constraints...

    Office of Scientific and Technical Information (OSTI)

    spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically...

  6. Maps and inverse maps in open quantum dynamics

    E-Print Network [OSTI]

    Thomas F. Jordan

    2008-07-08

    Two kinds of maps that describe evolution of states of a subsystem coming from dynamics described by a unitary operator for a larger system, maps defined for fixed mean values and maps defined for fixed correlations, are found to be quite different for the same unitary dynamics in the same situation in the larger system. An affine form is used for both kinds of maps to find necessary and sufficient conditions for inverse maps. All the different maps with the same homogeneous part in their affine forms have inverses if and only if the homogeneous part does. Some of these maps are completely positive; others are not, but the homogeneous part is always completely positive. The conditions for an inverse are the same for maps that are not completely positive as for maps that are. For maps defined for fixed mean values, the homogeneous part depends only on the unitary operator for the dynamics of the larger system, not on any state or mean values or correlations. Necessary and sufficient conditions for an inverse are stated several different ways: in terms of the maps of matrices, basis matrices, density matrices, or mean values. The inverse maps are generally not tied to the dynamics the way the maps forward are. A trace-preserving completely positive map that is unital can not have an inverse that is obtained from any dynamics described by any unitary operator for any states of a larger system.

  7. Evidence for Large-Scale Laramide Tectonic Inversion and a Mid...

    Open Energy Info (EERE)

    Laramide Tectonic Inversion and a Mid-Tertiary Caldera Ring Fracture Zone at the Lightning Dock Geothermal System, New Mexico Jump to: navigation, search OpenEI Reference...

  8. Donor states in inverse opals

    SciTech Connect (OSTI)

    Mahan, G. D.

    2014-09-21

    We calculate the binding energy of an electron bound to a donor in a semiconductor inverse opal. Inverse opals have two kinds of cavities, which we call octahedral and tetrahedral, according to their group symmetry. We put the donor in the center of each of these two cavities and obtain the binding energy. The binding energies become very large when the inverse opal is made from templates with small spheres. For spheres less than 50 nm in diameter, the donor binding can increase to several times its unconfined value. Then electrons become tightly bound to the donor and are unlikely to be thermally activated to the semiconductor conduction band. This conclusion suggests that inverse opals will be poor conductors.

  9. Joint China-United States Report for Year 1 Insulation Materials and Systems Project Area Clean Energy Research Center Building Energy Efficiency (CERC-BEE)

    SciTech Connect (OSTI)

    Stovall, Therese K; Biswas, Kaushik; Song, Bo; Zhang, Sisi

    2012-08-01

    In November of 2009, the presidents of China and the U.S. announced the establishment of the Clean Energy Research Center (CERC). This broad research effort is co-funded by both countries and involves a large number of research centers and universities in both countries. One part of this program is focused on improving the energy efficiency of buildings. One portion of the CERC-BEE was focused on building insulation systems. The research objective of this effort was to Identify and investigate candidate high performance fire resistant building insulation technologies that meet the goal of building code compliance for exterior wall applications in green buildings in multiple climate zones. A Joint Work Plan was established between researchers at the China Academy of Building Research and Oak Ridge National Laboratory. Efforts in the first year under this plan focused on information gathering. The objective of this research program is to reduce building energy use in China via improved building insulation technology. In cold regions in China, residents often use inefficient heating systems to provide a minimal comfort level within inefficient buildings. In warmer regions, air conditioning has not been commonly used. As living standards rise, energy consumption in these regions will increase dramatically unless significant improvements are made in building energy performance. Previous efforts that defined the current state of the built environment in China and in the U.S. will be used in this research. In countries around the world, building improvements have typically followed the implementation of more stringent building codes. There have been several changes in building codes in both the U.S. and China within the last few years. New U.S. building codes have increased the amount of wall insulation required in new buildings. New government statements from multiple agencies in China have recently changed the requirements for buildings in terms of energy efficiency and fire safety. A related issue is the degree to which new standards are adopted and enforced. In the U.S., standards are developed using a consensus process, and local government agencies are free to implement these standards or to ignore them. For example, some U.S. states are still using 2003 versions of the building efficiency standards. There is also a great variation in the degree to which the locally adopted standards are enforced in different U.S. cities and states. With a more central process in China, these issues are different, but possible impacts of variable enforcement efficacy may also exist. Therefore, current building codes in China will be compared to the current state of building fire-safety and energy-efficiency codes in the U.S. and areas for possible improvements in both countries will be explored. In particular, the focus of the applications in China will be on green buildings. The terminology of 'green buildings' has different meanings to different audiences. The U.S. research is interested in both new, green buildings, and on retrofitting existing inefficient buildings. An initial effort will be made to clarify the scope of the pertinent wall insulation systems for these applications.

  10. Decoupled Control of Flexure Jointed Hexapods Using Estimated Joint Space

    E-Print Network [OSTI]

    Chen, Yixin

    1 Decoupled Control of Flexure Jointed Hexapods Using Estimated Joint Space Mass-Inertia Matrix of flexure jointed hexapods (or Stewart platforms), a new decoupling method is proposed. The new decoupling. Keywords Vibration isolation, decoupling control, Stewart platform, precision robots, hexapod, symmetric

  11. Inverse differential kinematics Statics and force transformations

    E-Print Network [OSTI]

    De Luca, Alessandro

    ;Damped Least Squares method ! inversion of differential kinematics as an optimization problem ! function

  12. Rolling contact orthopaedic joint design

    E-Print Network [OSTI]

    Slocum, Alexander Henry, Jr

    2013-01-01

    Arthroplasty, the practice of rebuilding diseased biological joints using engineering materials, is often used to treat severe arthritis of the knee and hip. Prosthetic joints have been created in a "biomimetic" manner to ...

  13. Inverse problems in systems biology This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Schuster, Peter

    ]. The experimental data base for systems biology comes from various high-throughput technologies applied in fields, consideration of the interplay between the parts of systems is indispensable for analyzing, modeling experimental techniques and computational methods in order to construct predictive models. Both in building

  14. Double slotted socket spherical joint

    DOE Patents [OSTI]

    Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

    2001-05-22

    A new class of spherical joints is disclosed. These spherical joints are capable of extremely large angular displacements (full cone angles in excess of 270.degree.), while exhibiting no singularities or dead spots in their range of motion. These joints can improve or simplify a wide range of mechanical devices.

  15. Handbook on dynamics of jointed structures.

    SciTech Connect (OSTI)

    Ames, Nicoli M.; Lauffer, James P.; Jew, Michael D.; Segalman, Daniel Joseph; Gregory, Danny Lynn; Starr, Michael James; Resor, Brian Ray

    2009-07-01

    The problem of understanding and modeling the complicated physics underlying the action and response of the interfaces in typical structures under dynamic loading conditions has occupied researchers for many decades. This handbook presents an integrated approach to the goal of dynamic modeling of typical jointed structures, beginning with a mathematical assessment of experimental or simulation data, development of constitutive models to account for load histories to deformation, establishment of kinematic models coupling to the continuum models, and application of finite element analysis leading to dynamic structural simulation. In addition, formulations are discussed to mitigate the very short simulation time steps that appear to be required in numerical simulation for problems such as this. This handbook satisfies the commitment to DOE that Sandia will develop the technical content and write a Joints Handbook. The content will include: (1) Methods for characterizing the nonlinear stiffness and energy dissipation for typical joints used in mechanical systems and components. (2) The methodology will include practical guidance on experiments, and reduced order models that can be used to characterize joint behavior. (3) Examples for typical bolted and screw joints will be provided.

  16. Combined Borehole Seismic and Electromagnetic Inversion For High-Resolution Petrophysical Assessment Of Hydocarbon Reservoirs

    SciTech Connect (OSTI)

    Carlos Torres-Verdin; G. Michael Hoversten; Ki Ha Lee; Gregory Newman; Kurt Nihei

    2008-12-31

    This report summarizes the work performed between January 2005 and December 2007, under DOE research contract DE-FC26-04NT15507. The project is was performed by the Center for Petroleum and Geosystems Engineering of The University of Texas at Austin and Lawrence Berkeley National Laboratory under the auspices of the National Energy Technology Office (NETL) and the Strategic Center for Natural Gas and Oil (SCNGO). During the three-year project, we developed new methods to combine borehole sonic and electromagnetic (EM) measurements for the improved assessment of elastic and petrophysical properties of rock formations penetrated by a well. Sonic measurements consisted of full waveform acoustic amplitudes acquired with monopole and dipole sources, whereas EM measurements consisted of frequency-domain voltages acquired with multi-coil induction systems. The combination of sonic and EM measurements permitted the joint estimation of elastic and petrophysical properties in the presence of mud-filtrate invasion. It was conclusively shown that the combined interpretation of sonic and EM measurements reduced non-uniqueness in the estimation of elastic and petrophysical properties and improved the spatial resolution of the estimations compared to estimations yielded separately from the two types of measurements. Moreover, this approach enabled the assessment of dynamic petrophysical properties such as permeability, as it incorporated the physics of mud-filtrate invasion in the interpretation of the measurements. The first part of the project considered the development of fast and reliable numerical algorithms to simulate borehole sonic waveforms in 2D, 3D, and radial 1D media. Such algorithms were subsequently used in the quantitative estimation of elastic properties jointly from borehole sonic and EM measurements. In the second part of the project we developed a new algorithm to estimate water saturation, porosity, and dry-rock elastic moduli jointly from borehole sonic and EM measurements. This algorithm assumed radial 1D variations of fluid saturation due to mud-filtrate invasion. Subsequently, we adapted the estimation method to interpret borehole field measurements acquired in both a shaly-sand sedimentary sequence and a tight-gas sandstone formation. In the two cases, we simulated the process of mud-filtrate invasion and concomitantly honored sonic and EM measurements. We produced reliable estimates of permeability and dry-rock moduli that were successfully validated with rock-core measurements. Finally, we introduced a new stochastic inversion procedure to estimate elastic, electrical, and petrophysical properties of layered media jointly from waveform sonic and frequency-domain EM measurements. The procedure was based on Bayesian statistical inversion and delivered estimates of uncertainty under various forms of a-priori information about the unknown properties. Tests on realistic synthetic models confirmed the reliability of this procedure to estimate elastic and petrophysical properties jointly from sonic and EM measurements. Several extended abstracts and conference presentations stemmed from this project, including 2 SEG extended abstracts, 1 SPE extended abstract, and 2 SPWLA extended abstracts. Some of these extended abstracts have been submitted for publication in peer-reviewed journals.

  17. Achieving joint benefits from joint implementation

    SciTech Connect (OSTI)

    Moomaw, W.R. [Tufts Univ., Medford, MA (United States)

    1995-11-01

    Joint Implementation (JI) appears to have been born with Applied Energy Services Guatemala project in 1988. That project, to plant 52 million trees, protect existing forests from cutting and fire, and enhance rural development, is being implemented by CARE Guatemala to offset 120 per cent of the emissions of a small coal burning power plant that has been built in Connecticut. Since that time, several utilities and governments have initiated additional projects. Not all of these necessarily consist of tree planting in other countries, but may consist of energy efficiency or energy conservation programs designed to reduce carbon emissions by at least as much as the additional releases from a new facility. All JI projects share the characteristic of linking the release of greenhouse gases in an industrial country with an offset that reduces or absorbs a comparable amount in another country. The emitter in the industrial country is willing to pay for the reduction elsewhere because costs are less than they would be at home.

  18. Fractional Inversion in Krylov Space

    E-Print Network [OSTI]

    B. Bunk

    1998-05-28

    The fractional inverse $M^{-\\gamma}$ (real $\\gamma >0$) of a matrix $M$ is expanded in a series of Gegenbauer polynomials. If the spectrum of $M$ is confined to an ellipse not including the origin, convergence is exponential, with the same rate as for Chebyshev inversion. The approximants can be improved recursively and lead to an iterative solver for $M^\\gamma x = b$ in Krylov space. In case of $\\gamma = 1/2$, the expansion is in terms of Legendre polynomials, and rigorous bounds for the truncation error are derived.

  19. Absolutely and uniformly convergent iterative approach to inverse scattering with an infinite radius of convergence

    DOE Patents [OSTI]

    Kouri, Donald J. (Houston, TX); Vijay, Amrendra (Houston, TX); Zhang, Haiyan (Houston, TX); Zhang, Jingfeng (Houston, TX); Hoffman, David K. (Ames, IA)

    2007-05-01

    A method and system for solving the inverse acoustic scattering problem using an iterative approach with consideration of half-off-shell transition matrix elements (near-field) information, where the Volterra inverse series correctly predicts the first two moments of the interaction, while the Fredholm inverse series is correct only for the first moment and that the Volterra approach provides a method for exactly obtaining interactions which can be written as a sum of delta functions.

  20. Jointness of Growth Determinants

    E-Print Network [OSTI]

    Doppelhofer, Gernot; Weeks, Melvyn

    2006-03-14

    @cam.ac.uk, Tel: +44 1223 335200, Fax: +44 1223 335475. ‡Faculty of Economics, University of Cambridge, Cambridge CB3 9DD, UK. Email: mw217@econ.cam.ac.uk 1 Introduction Model uncertainty is encountered in many areas of empirical work in economics... presents the empirical results for jointness of growth, and section 5 concludes. 2 Bayesian Model Averaging Consider the following general linear regression model y = X? + ? (1) where y is a (T × 1) vector of observations of the dependent variable...

  1. Joint Facilities User Forum

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATIONIntroducingJobs Human ResourcesJohn@EnergySecurity NewJoint

  2. Transmission Eigenvalues in Inverse Scattering Theory

    E-Print Network [OSTI]

    2012-04-22

    TE and Scattering Theory. Spherically Stratified Media. Transmission Eigenvalues. Open Problem. Transmission Eigenvalues in Inverse. Scattering Theory.

  3. Radon Transform Inversion using the Shearlet Representation

    E-Print Network [OSTI]

    Labate, Demetrio

    Radon Transform Inversion using the Shearlet Representation Flavia Colonna Department The inversion of the Radon transform is a classical ill-posed inverse problem where some method-optimal rate of convergence in estimating a large class of images from noisy Radon data. This is achieved

  4. Seismicity and structure of Akutan and Makushin Volcanoes, Alaska, using joint body and surface wave tomography

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Syracuse, E. M.; Maceira, M.; Zhang, H.; Thurber, C. H.

    2015-02-18

    Joint inversions of seismic data recover models that simultaneously fit multiple constraints while playing upon the strengths of each data type. Here, we jointly invert 14 years of local earthquake body wave arrival times from the Alaska Volcano Observatory catalog and Rayleigh wave dispersion curves based upon ambient noise measurements for local Vp, Vs, and hypocentral locations at Akutan and Makushin Volcanoes using a new joint inversion algorithm.The velocity structure and relocated seismicity of both volcanoes are significantly more complex than many other volcanoes studied using similar techniques. Seismicity is distributed among several areas beneath or beyond the flanks ofmore »both volcanoes, illuminating a variety of volcanic and tectonic features. The velocity structures of the two volcanoes are exemplified by the presence of narrow high-Vp features in the near surface, indicating likely current or remnant pathways of magma to the surface. A single broad low-Vp region beneath each volcano is slightly offset from each summit and centered at approximately 7 km depth, indicating a potential magma chamber, where magma is stored over longer time periods. Differing recovery capabilities of the Vp and Vs datasets indicate that the results of these types of joint inversions must be interpreted carefully.« less

  5. Seismicity and structure of Akutan and Makushin Volcanoes, Alaska, using joint body and surface wave tomography

    SciTech Connect (OSTI)

    Syracuse, E. M.; Maceira, M.; Zhang, H.; Thurber, C. H.

    2015-02-18

    Joint inversions of seismic data recover models that simultaneously fit multiple constraints while playing upon the strengths of each data type. Here, we jointly invert 14 years of local earthquake body wave arrival times from the Alaska Volcano Observatory catalog and Rayleigh wave dispersion curves based upon ambient noise measurements for local Vp, Vs, and hypocentral locations at Akutan and Makushin Volcanoes using a new joint inversion algorithm.The velocity structure and relocated seismicity of both volcanoes are significantly more complex than many other volcanoes studied using similar techniques. Seismicity is distributed among several areas beneath or beyond the flanks of both volcanoes, illuminating a variety of volcanic and tectonic features. The velocity structures of the two volcanoes are exemplified by the presence of narrow high-Vp features in the near surface, indicating likely current or remnant pathways of magma to the surface. A single broad low-Vp region beneath each volcano is slightly offset from each summit and centered at approximately 7 km depth, indicating a potential magma chamber, where magma is stored over longer time periods. Differing recovery capabilities of the Vp and Vs datasets indicate that the results of these types of joint inversions must be interpreted carefully.

  6. Variational Structure of Inverse Problems in Wave Propagation and Vibration

    E-Print Network [OSTI]

    Variational Structure of Inverse Problems in Wave Propagation and Vibration James G. Berryman in wave propagation (traveltime tomography) and two examples in vibration (the plucked string and free.'' For vibrating systems, the apparently very complex behavior of an excited string, drumhead, or the Earth can

  7. Current distribution in HTSC tapes obtained by inverse problem calculation

    E-Print Network [OSTI]

    Amoros, Jaume

    . There have been proposed several methods for non destructive in situ, or nearly in situ, testing of large on a non destructive measurement of the magnetic field created by the own current flowing in the SC. In this work, the QR inversion strategy is extended to non finite systems by considering the effect

  8. On a theory of vessels and the inverse scattering

    E-Print Network [OSTI]

    A. Melnikov

    2011-08-23

    In this paper we present a theory of vessels and its application to the classical inverse scattering of the Sturm-Liouville differential equation. The classical inverse scattering theory, including all its ingredients: Jost solutions, the Gelfand-Levitan equation, the tau function, corresponds to regular vessels, defined by bounded operators. A contribution of this work is the construction of models of vessels corresponding to unbounded operators, which is a first step for the inverse scattering for a wider class of potentials. A detailed research of Jost solutions and the corresponding vessel is presented for the unbounded Sturm-Liouville case. Models of vessels on curves, corresponding to unbounded operators are presented as a tool to study Linear Differential equations of finite order with a spectral parameter and as examples, we show how the family of Non Linear Schrodinger equations and Canonical Systems arise.

  9. Inverse scattering for a specific resonating group model nonlocality

    SciTech Connect (OSTI)

    Pantis, G.; Sofianos, S.A. [Department of Physics, University of South Africa, Pretoria (South Africa)] [Department of Physics, University of South Africa, Pretoria (South Africa)

    1996-10-01

    An inverse scattering method of Lipperheide and Fiedeldey [Z. Phys. A {bold 286}, 45 (1978); {bold 301}, 81 (1981)] has been used to construct an energy-dependent potential from the elastic-scattering phase shifts of the recently developed {ital K} model of Kaneko, LeMere, and Tang [Phys. Rev. C {bold 44}, 1588 (1991); {bold 46}, 298 (1992)] for the {ital n}{minus}{alpha} and {ital n}{minus}{sup 40}Ca systems. The local momentum of the inversion potential is subsequently used to recover the Wigner transforms of the {ital K} model. The results obtained indicate that it is possible to find, via inversion, an {ital l}-independent Wigner transform, which, when calculated at all energies, can provide us with the full nonlocality. {copyright} {ital 1996 The American Physical Society.}

  10. Center for Inverse Design: Modality 1 - Inverse Band Structure

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B LReportsDeterminatIonFornl71: Inverse Band Structure Modality 1

  11. Method of forming a joint

    DOE Patents [OSTI]

    Butt, Darryl Paul; Cutler, Raymond Ashton; Rynders, Steven Walton; Carolan, Michael Francis

    2006-08-22

    A method of joining at least two sintered bodies to form a composite structure, including providing a first multicomponent metallic oxide having a perovskitic or fluorite crystal structure; providing a second sintered body including a second multicomponent metallic oxide having a crystal structure of the same type as the first; and providing at an interface a joint material containing at least one metal oxide containing at least one metal identically contained in at least one of the first and second multicomponent metallic oxides. The joint material is free of cations of Si, Ge, Sn, Pb, P and Te and has a melting point below the sintering temperatures of both sintered bodies. The joint material is heated to a temperature above the melting point of the metal oxide(s) and below the sintering temperatures of the sintered bodies to form the joint. Structures containing such joints are also disclosed.

  12. INVERSE PROBLEMS IN HIGH DIMENSIONAL STOCHASTIC SYSTEMS

    E-Print Network [OSTI]

    Hero, Alfred O.

    Professor Ji Zhu #12;To My Parents, Patrick and Cynthia. If I can attain half of the success you have graduate students and now life long friends Yongsheng Huang and Arnau Tibau Puig. Most importantly, I thank my beautiful wife and best friend Erica for her love and patience over these past four years while

  13. Tomographic inversion techniques incorporating physical constraints for line integrated spectroscopy in stellarators and tokamaksa)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pablant, N. A.; Bell, R. E.; Bitter, M.; Delgado-Aparicio, L.; Hill, K. W.; Lazerson, S.; Morita, S.

    2014-08-08

    Accurate tomographic inversion is important for diagnostic systems on stellarators and tokamaks which rely on measurements of line integrated emission spectra. A tomographic inversion technique based on spline optimization with enforcement of constraints is described that can produce unique and physically relevant inversions even in situations with noisy or incomplete input data. This inversion technique is routinely used in the analysis of data from the x-ray imaging crystal spectrometer (XICS) installed at LHD. The XICS diagnostic records a 1D image of line integrated emission spectra from impurities in the plasma. Through the use of Doppler spectroscopy and tomographic inversion, XICSmore »can provide pro#12;file measurements of the local emissivity, temperature and plasma flow. Tomographic inversion requires the assumption that these measured quantities are flux surface functions, and that a known plasma equilibrium reconstruction is available. In the case of low signal levels or partial spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically relevant solutions. The addition of physical constraints, such as parameter ranges, derivative directions, and boundary conditions, allow for unique solutions to be reliably found. The constrained inversion technique described here utilizes a modifi#12;ed Levenberg-Marquardt optimization scheme, which introduces a condition avoidance mechanism by selective reduction of search directions. The constrained inversion technique also allows for the addition of more complicated parameter dependencies, for example geometrical dependence of the emissivity due to asymmetries in the plasma density arising from fast rotation. The accuracy of this constrained inversion technique is discussed, with an emphasis on its applicability to systems with limited plasma coverage.« less

  14. Tomographic inversion techniques incorporating physical constraints for line integrated spectroscopy in stellarators and tokamaksa)

    SciTech Connect (OSTI)

    Pablant, N. A.; Bell, R. E.; Bitter, M.; Delgado-Aparicio, L.; Hill, K. W.; Lazerson, S.; Morita, S.

    2014-11-01

    Accurate tomographic inversion is important for diagnostic systems on stellarators and tokamaks which rely on measurements of line integrated emission spectra. A tomographic inversion technique based on spline optimization with enforcement of constraints is described that can produce unique and physically relevant inversions even in situations with noisy or incomplete input data. This inversion technique is routinely used in the analysis of data from the x-ray imaging crystal spectrometer (XICS) installed at LHD. The XICS diagnostic records a 1D image of line integrated emission spectra from impurities in the plasma. Through the use of Doppler spectroscopy and tomographic inversion, XICS can provide pro#12;file measurements of the local emissivity, temperature and plasma flow. Tomographic inversion requires the assumption that these measured quantities are flux surface functions, and that a known plasma equilibrium reconstruction is available. In the case of low signal levels or partial spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically relevant solutions. The addition of physical constraints, such as parameter ranges, derivative directions, and boundary conditions, allow for unique solutions to be reliably found. The constrained inversion technique described here utilizes a modifi#12;ed Levenberg-Marquardt optimization scheme, which introduces a condition avoidance mechanism by selective reduction of search directions. The constrained inversion technique also allows for the addition of more complicated parameter dependencies, for example geometrical dependence of the emissivity due to asymmetries in the plasma density arising from fast rotation. The accuracy of this constrained inversion technique is discussed, with an emphasis on its applicability to systems with limited plasma coverage.

  15. Tomographic inversion techniques incorporating physical constraints for line integrated spectroscopy in stellarators and tokamaks

    SciTech Connect (OSTI)

    Pablant, N. A.; Bell, R. E.; Bitter, M.; Delgado-Aparicio, L.; Hill, K. W.; Lazerson, S. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Morita, S. [National Institute for Fusion Science, Toki 509-5292, Gifu (Japan)

    2014-11-15

    Accurate tomographic inversion is important for diagnostic systems on stellarators and tokamaks which rely on measurements of line integrated emission spectra. A tomographic inversion technique based on spline optimization with enforcement of constraints is described that can produce unique and physically relevant inversions even in situations with noisy or incomplete input data. This inversion technique is routinely used in the analysis of data from the x-ray imaging crystal spectrometer (XICS) installed at the Large Helical Device. The XICS diagnostic records a 1D image of line integrated emission spectra from impurities in the plasma. Through the use of Doppler spectroscopy and tomographic inversion, XICS can provide profile measurements of the local emissivity, temperature, and plasma flow. Tomographic inversion requires the assumption that these measured quantities are flux surface functions, and that a known plasma equilibrium reconstruction is available. In the case of low signal levels or partial spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically relevant solutions. The addition of physical constraints, such as parameter ranges, derivative directions, and boundary conditions, allow for unique solutions to be reliably found. The constrained inversion technique described here utilizes a modified Levenberg-Marquardt optimization scheme, which introduces a condition avoidance mechanism by selective reduction of search directions. The constrained inversion technique also allows for the addition of more complicated parameter dependencies, for example, geometrical dependence of the emissivity due to asymmetries in the plasma density arising from fast rotation. The accuracy of this constrained inversion technique is discussed, with an emphasis on its applicability to systems with limited plasma coverage.

  16. Bulk Power System Dynamics and Control VI, August 22-27, 2004, Cortina D'Ampezzo, Italy 1 Joint Energy and Reserves Auction with

    E-Print Network [OSTI]

    Oren, Shmuel S.

    of restructured electricity markets is that an Independent System Operator (ISO) is charged with the task@ieor.berkeley.edu e-mail: ramteen@ieor.berkeley.edu Abstract-- System operators in the electricity industry are required to procure reserve capacity to deal with unanticipated outages, demand shocks, and transmission

  17. Fast methods for inverse wave scattering problems

    E-Print Network [OSTI]

    Lee, Jung Hoon, Ph. D. Massachusetts Institute of Technology

    2008-01-01

    Inverse wave scattering problems arise in many applications including computerized/diffraction tomography, seismology, diffraction/holographic grating design, object identification from radar singals, and semiconductor ...

  18. Transmission Eigenvalues in Inverse Scattering Theory

    E-Print Network [OSTI]

    Title: Transmission Eigenvalues in Inverse Scattering Theory Abstract: The transmission eigenvalue problem is a new class of eigenvalue problems that has

  19. Inversion Methods for Determining Tsunami Source Amplitudes

    E-Print Network [OSTI]

    Percival, Don

    Inversion Methods for Determining Tsunami Source Amplitudes from DART Buoy Data Don Percival: given data from DART buoys and models for unit magnitude earthquakes from various tsunami source

  20. The Generalized Stieltjes Transform and Its Inverse

    E-Print Network [OSTI]

    John H. Schwarz

    2004-05-18

    The generalized Stieltjes transform (GST) is an integral transform that depends on a parameter $\\rho > 0$. In previous work a convenient form of the inverse transformation was derived for the case $\\rho = 3/2$. This paper generalizes that result to all $\\rho > 0$. It is a well-known fact that the GST can be formulated as an iterated Laplace transform, and that therefore its inverse can be expressed as an iterated inverse Laplace transform. The form of the inverse transform derived here is a one-dimensional integral that is considerably simpler.

  1. A typology of Bantu subject inversion

    E-Print Network [OSTI]

    Marten, Lutz; van der Wal, Jenneke

    2015-01-01

    generalisations are drawn. For example, languages with instrument inversion or with patient inversion always have locative inversion (but not vice versa), or if a language has at least one inversion construction, it always has at least either default agreement... ): (36) Se-tulo seo ba-sadi ba-se-rek-ile-ng kajeno … [Sesotho] 7-chair REL7 2-woman SM2-OM7-buy-PRF-REL today ‘The chair which the women bought today …’ (37) Mbatya dza-va-ka-son-er-a va-kadzi [Shona] 10.clothes REL10-SM2...

  2. Joint probabilities and quantum cognition

    SciTech Connect (OSTI)

    Acacio de Barros, J. [Liberal Studies, 1600 Holloway Ave., San Francisco State University, San Francisco, CA 94132 (United States)

    2012-12-18

    In this paper we discuss the existence of joint probability distributions for quantumlike response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

  3. Impact of transport model errors on the global and regional methane emissions estimated by inverse modelling

    E-Print Network [OSTI]

    Locatelli, R.

    A modelling experiment has been conceived to assess the impact of transport model errors on methane emissions estimated in an atmospheric inversion system. Synthetic methane observations, obtained from 10 different model ...

  4. A feasibility study for experimentally determining dynamic force distribution in a lap joint.

    SciTech Connect (OSTI)

    Mayes, Randall Lee

    2013-11-01

    Developing constitutive models of the physics in mechanical joints is currently stymied by inability to measure forces and displacements within the joint. The current state of the art estimates whole joint stiffness and energy loss per cycle from external measured force input and one or two acceleration responses. To validate constitutive models beyond this state requires a measurement of the distributed forces and displacements at the joint interface. Unfortunately, introducing measurement devices at the interface completely disrupts the desired physics. A feasibility study is presented for a non-intrusive method of solving for the interface dynamic forces from an inverse problem using full field measured responses. The responses come from the viewable surface of a beam. The noise levels associated with digital image correlation and continuous scanning laser Doppler velocimetry are evaluated from typical beam experiments. Two inverse problems are simulated. One utilizes the extended Sum of Weighted Accelerations Technique (SWAT). The second is a new approach dubbed the method of truncated orthogonal forces. These methods are much more robust if the contact patch geometry is well identified. Various approaches to identifying the contact patch are investigated, including ion marker tracking, Prussian blue and ultrasonic measurements. A typical experiment is conceived for a beam which has a lap joint at one end with a single bolt connecting it to another identical beam. In a virtual test using the beam finite element analysis, it appears that the SWAT inverse method requires evaluation of too many coefficients to adequately identify the force distribution to be viable. However, the method of truncated orthogonal forces appears viable with current digital image correlation (and probably other) imaging techniques.

  5. Inverse Gamma Distribution John D. Cook

    E-Print Network [OSTI]

    Cook, John D.

    Inverse Gamma Distribution John D. Cook October 3, 2008 Abstract These notes write up some basic facts regarding the inverse gamma distribution, also called the inverted gamma distribution. In a sense this distribution is unnecessary: it has the same distribution as the reciprocal of a gamma distribution. However

  6. Solving Stochastic Inverse Problems: A Sparse Grid

    E-Print Network [OSTI]

    Zabaras, Nicholas J.

    Solving Stochastic Inverse Problems: A Sparse Grid Collocation Approach N. Zabaras Cornell to large scale problems. To solve large-scale problems involving high-dimensional stochastic spaces (in Methods for Large-Scale Inverse Problems and Quantification of Uncertainity. Edited by People on Earth c

  7. Solving Generalized Small Inverse Problems Noboru Kunihiro

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Solving Generalized Small Inverse Problems Noboru Kunihiro The University of Tokyo, Japan kunihiro@k.u-tokyo.ac.jp Abstract. We introduce a "generalized small inverse problem (GSIP)" and present an algorithm for solving such that the target problem can be solved in polynomial time in log M in an explicit form. Since GSIPs in- clude some

  8. Positive and inverse isotope effect on superconductivity

    E-Print Network [OSTI]

    Tian De Cao

    2009-09-04

    This article improves the BCS theory to include the inverse isotope effect on superconductivity. An affective model can be deduced from the model including electron-phonon interactions, and the phonon-induced attraction is simply and clearly explained on the electron Green function. The focus of this work is on how the positive or inverse isotope effect occurs in superconductors.

  9. Inversion of the attenuated Radon transform

    E-Print Network [OSTI]

    Münster, Westfälische Wilhelms-Universität

    Inversion of the attenuated Radon transform F. Natterer Institut fur Numerische und instrumentelle@math.uni-muenster.de Abstract We derive an exact inversion formula for the attenuated Radon transform. The formula is closely for x 2 IR2, #12; 2 S1 Dax; #12; = 1Z 0 ax + t#12;dt : 1.1 The attenuated Radon transform Ra is de ned

  10. A General Framework for Nonlinear Multigrid Inversion

    E-Print Network [OSTI]

    cost. . . . . . . . . 9 2 Pseudo­code specification of a two­grid inversion algorithm. The notation c) and r (q+1) explicit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Pseudo­code 4 Pseudo­code specification of fixed grid and multigrid inversion methods for ODT problem showing (a

  11. Photonic Design: From Fundamental Solar Cell Physics to Computational Inverse Design

    E-Print Network [OSTI]

    Miller, Owen Dennis

    2012-01-01

    1.2 Inverse Design . . . . . . . . . . . . . . . .II Photonic Inverse Design 5 ANew Photonic Inverse Design Method 5.1 Shape

  12. Joint inversion for three dimensional S velocity mantle structure along the Tethyan margin

    E-Print Network [OSTI]

    van der Lee, Suzan

    extending flatly in the transition zone, and discontinuous slabs beneath the Apennines and the Zagros belt

  13. Joint Inversion of Production and Temperature Data Illuminates Vertical Permeability Distribution in Deep Reservoirs 

    E-Print Network [OSTI]

    Zhang, Zhishuai

    2012-10-19

    Characterization of connectivity in compartmentalized deepwater Gulf of Mexico (GoM) reservoirs is an outstanding challenge of the industry that can significantly impact the development planning and recovery from these ...

  14. Reservoir characterization in an underground gas storage field using joint inversion of flow and geodetic data

    E-Print Network [OSTI]

    Bottazzi, F.

    Characterization of reservoir properties like porosity and permeability in reservoir models typically relies on history matching of production data, well pressure data, and possibly other fluid-dynamical data. Calibrated ...

  15. Joint flow-seismic inversion for characterizing fractured reservoirs: theoretical approach and numerical modeling

    E-Print Network [OSTI]

    Kang, Peter K.

    2013-01-01

    Traditionally, seismic interpretation is performed without any account of the flow behavior. Here, we present a methodology to characterize fractured geologic media by integrating flow and seismic data. The key element of ...

  16. 2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data In The

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand Dalton Jump to:Wylie,Information Skord, Et15: Leases7 CCR

  17. Joint inversion of electrical and seismic data for Fracture char. and

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICE INDUSTRIALU.S. DepartmentJean Seibert StuckySolarList

  18. Time-lapse Joint Inversion of Geophysical Data and its Applications to

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings for Specific2HeldTidal EnergyTimGeothermal

  19. 3D electromagnetic inversion for environmental site characterization

    SciTech Connect (OSTI)

    Alumbaugh, D.L.; Newman, G.A.

    1997-04-01

    A 3-D non-linear electromagnetic inversion scheme has been developed to produce images of subsurface conductivity structure from electromagnetic geophysical data. The solution is obtained by successive linearized model updates where full forward modeling is employed at each iteration to compute model sensitivities and predicted data. Regularization is applied to the problem to provide stability. Because the inverse part of the problem requires the solution of 10`s to 100`s of thousands of unknowns, and because each inverse iteration requires many forward models to be computed, the code has been implemented on massively parallel computer platforms. The use of the inversion code to image environmental sites is demonstrated on a data set collected with the Apex Parametrics {open_quote}MaxMin I-8S{close_quote} over a section of stacked barrels and metal filled boxes at the Idaho National Laboratory`s {open_quote}Cold Test Pit{close_quote}. The MaxMin is a loop-loop frequency domain system which operates from 440 Hz up to 56 kHz using various coil separations; for this survey coil separations of 15, 30 and 60 feet were employed. The out-of phase data are shown to be of very good quality while the in-phase are rather noisy due to slight mispositioning errors, which cause improper cancellation of the primary free space field in the receiver. Weighting the data appropriately by the estimated noise and applying the inversion scheme is demonstrated to better define the structure of the pit. In addition, comparisons are given for single coil separations and multiple separations to show the benefits of using multiple offset data.

  20. Inverse Transport Theory of Photoacoustics

    E-Print Network [OSTI]

    Guillaume Bal; Alexandre Jollivet; Vincent Jugnon

    2009-08-27

    We consider the reconstruction of optical parameters in a domain of interest from photoacoustic data. Photoacoustic tomography (PAT) radiates high frequency electromagnetic waves into the domain and measures acoustic signals emitted by the resulting thermal expansion. Acoustic signals are then used to construct the deposited thermal energy map. The latter depends on the constitutive optical parameters in a nontrivial manner. In this paper, we develop and use an inverse transport theory with internal measurements to extract information on the optical coefficients from knowledge of the deposited thermal energy map. We consider the multi-measurement setting in which many electromagnetic radiation patterns are used to probe the domain of interest. By developing an expansion of the measurement operator into singular components, we show that the spatial variations of the intrinsic attenuation and the scattering coefficients may be reconstructed. We also reconstruct coefficients describing anisotropic scattering of photons, such as the anisotropy coefficient $g(x)$ in a Henyey-Greenstein phase function model. Finally, we derive stability estimates for the reconstructions.

  1. MODEL SELECTION FOR SPECTROPOLARIMETRIC INVERSIONS

    SciTech Connect (OSTI)

    Asensio Ramos, A.; Manso Sainz, R.; Martinez Gonzalez, M. J.; Socas-Navarro, H.; Viticchie, B.

    2012-04-01

    Inferring magnetic and thermodynamic information from spectropolarimetric observations relies on the assumption of a parameterized model atmosphere whose parameters are tuned by comparison with observations. Often, the choice of the underlying atmospheric model is based on subjective reasons. In other cases, complex models are chosen based on objective reasons (for instance, the necessity to explain asymmetries in the Stokes profiles) but it is not clear what degree of complexity is needed. The lack of an objective way of comparing models has, sometimes, led to opposing views of the solar magnetism because the inferred physical scenarios are essentially different. We present the first quantitative model comparison based on the computation of the Bayesian evidence ratios for spectropolarimetric observations. Our results show that there is not a single model appropriate for all profiles simultaneously. Data with moderate signal-to-noise ratios (S/Ns) favor models without gradients along the line of sight. If the observations show clear circular and linear polarization signals above the noise level, models with gradients along the line are preferred. As a general rule, observations with large S/Ns favor more complex models. We demonstrate that the evidence ratios correlate well with simple proxies. Therefore, we propose to calculate these proxies when carrying out standard least-squares inversions to allow for model comparison in the future.

  2. Joint Durability Where Next?

    E-Print Network [OSTI]

    to be prevented from saturating the concrete · Permeability of the concrete should be as low as practical occurs where the concrete does not dry out #12;The Symptoms · Shadowing · Thin flakes #12;Saturation · The air void system in the in-place concrete must be adequate #12;Design · Drainage · Avoid bathtubs

  3. Flame Height Measurement of Laminar Inverse Diffusion Flames

    E-Print Network [OSTI]

    Mikofski, Mark A.; Williams, Timothy C.; Shaddix, Christopher R.; Blevins, Linda G.

    2006-01-01

    Flame Height Measurement of Laminar Inverse Diffusion Flamesinverse diffusion flame, laminar, flame height, OH, laserair and methane-air laminar inverse diffusion flames were

  4. Local Uniqueness for the Fixed Energy Fixed Angle Inverse Problem ...

    E-Print Network [OSTI]

    Abstract. We prove local uniqueness for the inverse problem in obstacle scattering at a fixed energy and fixed incident angle. We consider the inverse problem of ...

  5. Joint and Conflat Leakage, March 2007 Tests P. Titus, MIT (Mar. 7,2007)

    E-Print Network [OSTI]

    McDonald, Kirk

    Joint and Conflat Leakage, March 2007 Tests P. Titus, MIT (Mar. 7,2007) · Problems feed closure valve that was "found equipment" · Cobbled together cryogenic system does not represent detected from the center terminal assembly. #12;Joint and Conflat Leakage, March 2007 Tests · During March

  6. A Model-Based Impedance Control Scheme for High-Performance Hydraulic Joints

    E-Print Network [OSTI]

    Papadopoulos, Evangelos

    A Model-Based Impedance Control Scheme for High-Performance Hydraulic Joints Glen Bilodeau1, Greece Abstract Impedance control of a hydraulic servoactuator joint system is discussed in this paper individually. Due to nonlinear properties of hydraulic actuators, impedance control is difficult. The control

  7. Utility of Joint Processing Schemes Annika Klockar, Carmen Botella, Tommy Svensson, Anna Brunstrom, Mikael Sternad

    E-Print Network [OSTI]

    Utility of Joint Processing Schemes Annika Klockar, Carmen Botella, Tommy Svensson, Anna Brunstrom and increase data rates, in particular at the cell edges. In this paper, we evaluate the utility of Internet applications in a joint processing enabled cluster of base stations. Utility is used to quantify system

  8. Foreign Fishery Developments Japanese Joint

    E-Print Network [OSTI]

    at a reduced price, which is one-tenth of the standard price of fuel in the coun- tries of Latin America in Venezuela for the catching and processing of shrimp. (The vessels of this joint venture can purchase fuel listed in millions of dollars. Total 25 19 10 26 31 20 60 193 20 Marine Fisheries Review #12;Latin

  9. A General Framework for Nonlinear Multigrid Inversion

    E-Print Network [OSTI]

    cost. . . . . . . . . 9 2 Pseudo-code specification of a two-grid inversion algorithm. The notation c) explicit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Pseudo-code specification of (a grid update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Pseudo-code

  10. Methods for Bayesian inversion of seismic data 

    E-Print Network [OSTI]

    Walker, Matthew James

    2015-06-30

    The purpose of Bayesian seismic inversion is to combine information derived from seismic data and prior geological knowledge to determine a posterior probability distribution over parameters describing the elastic and ...

  11. Robust phase sensitive inversion recovery imaging 

    E-Print Network [OSTI]

    Garach, Ravindra Mahendrakumar

    2005-11-01

    Imaging. (August 2005) Garach, Ravindra Mahendrakumar, B.E., Gujarat University Chair of Advisory Committee: Dr. Jim Ji Inversion Recovery (IR) is a powerful tool for contrast manipulation in Mag- netic Resonance Imaging (MRI). IR can provide strong...

  12. An evaluation of joint repair methods for cast iron natural gas distribution mains and the preliminary development of an alternative joint seal

    E-Print Network [OSTI]

    Rogers, Thomas Edward

    1984-01-01

    Approximately 10 percent of the natural gas pumped into distribution systems is unaccounted for. A significant portion of this amount is leakage from joints in 50 to 100 year old cast iron main. Because of the cumulative ...

  13. JOINT CONFERENCE SOUTHERN ASSOCIATION FOR CANADIAN STUDIES

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    JOINT CONFERENCE SOUTHERN ASSOCIATION FOR CANADIAN STUDIES ASSOCIATION OF QUEBEC STUDIES KENNESAW and the Association of Quebec Studies will be holding a joint conference at Kennesaw State University on April 13

  14. Joint Structures Determined by Clustering Microearthquakes

    E-Print Network [OSTI]

    Sciences and Geomechanics Abstracts Roff et al., Joint Structures (Running header) #12;2 Abstract A new

  15. Joint Genome Institute's Automation Approach and History

    E-Print Network [OSTI]

    Roberts, Simon

    2006-01-01

    Joint Genome Institute’s Automation Approach and Historythroughput environment; – automation does not necessarilyissues “Islands of Automation” – modular instruments with

  16. DOE-EERC jointly sponsored research program

    SciTech Connect (OSTI)

    Hendrikson, J.G.; Sondreal, E.A.

    1999-09-01

    U.S. Department of Energy (DOE) Cooperative Agreement DE-FC21-93MC30098 funded through the Office of Fossil Energy and administered at the Federal Energy Technology Center (FETC) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy and Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying efficient, nonpolluting energy technologies that can compete effectively in meeting market demands for clean fuels, chemical feedstocks, and electricity in the 21st century. The objective of the JSRP was to advance the deployment of advanced technologies for improving energy efficiency and environmental performance through jointly sponsored research on topics that would not be adequately addressed by the private sector alone. Examples of such topics include the barriers to hot-gas cleaning impeding the deployment of high-efficiency power systems and the search for practical means for sequestering CO{sub 2} generated by fossil fuel combustion. The selection of particular research projects was guided by a combination of DOE priorities and market needs, as provided by the requirement for joint venture funding approved both by DOE and the private sector sponsor. The research addressed many different energy resource and related environmental problems, with emphasis directed toward the EERC's historic lead mission in low-rank coals (LRCs), which represent approximately half of the U.S. coal resources in the conterminous states, much larger potential resources in Alaska, and a major part of the energy base in the former U.S.S.R., East Central Europe, and the Pacific Rim. The Base and JSRP agreements were tailored to the growing awareness of critical environmental issues, including water supply and quality, air toxics (e.g., mercury), fine respirable particulate matter (PM{sub 2.5}), and the goal of zero net CO{sub 2} emissions.

  17. The influence of air temperature inversions on snowmelt and glacier mass-balance simulations, Ammassalik island, SE Greenland

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.

    2009-01-01

    In many applications, a realistic description of air temperature inversions is essential for accurate snow and glacier ice melt, and glacier mass-balance simulations. A physically based snow-evolution modeling system (SnowModel) was used to simulate eight years (1998/99 to 2005/06) of snow accumulation and snow and glacier ice ablation from numerous small coastal marginal glaciers on the SW-part of Ammassalik Island in SE Greenland. These glaciers are regularly influenced by inversions and sea breezes associated with the adjacent relatively low temperature and frequently ice-choked fjords and ocean. To account for the influence of these inversions on the spatiotemporal variation of air temperature and snow and glacier melt rates, temperature inversion routines were added to MircoMet, the meteorological distribution sub-model used in SnowModel. The inversions were observed and modeled to occur during 84% of the simulation period. Modeled inversions were defined not to occur during days with strong winds and high precipitation rates due to the potential of inversion break-up. Field observations showed inversions to extend from sea level to approximately 300 m a.s.l., and this inversion level was prescribed in the model simulations. Simulations with and without the inversion routines were compared. The inversion model produced air temperature distributions with warmer lower elevation areas and cooler higher elevation areas than without inversion routines due to the use of cold sea-breeze base temperature data from underneath the inversion. This yielded an up to 2 weeks earlier snowmelt in the lower areas and up to 1 to 3 weeks later snowmelt in the higher elevation areas of the simulation domain. Averaged mean annual modeled surface mass-balance for all glaciers (mainly located above the inversion layer) was -720 {+-} 620 mm w.eq. y{sup -1} for inversion simulations, and -880 {+-} 620 mm w.eq. y{sup -1} without the inversion routines, a difference of 160 mm w.eq. y{sup -1}. The annual glacier loss for the two simulations was 50.7 x 10{sup 6} m{sup 3} y{sup -1} and 64.4 x 10{sup 6} m{sup 3} y{sup -1} for all glaciers - a difference of {approx}21%. The average equilibrium line altitude (ELA) for all glaciers in the simulation domain was located at 875 m a.s.l. and at 900 m a.s.l. for simulations with or without inversion routines, respectively.

  18. Evaluating atmospheric CO2 inversions at multiple scales over a highly-inventoried agricultural landscape.

    SciTech Connect (OSTI)

    Schuh, Andrew E.; Lauvaux, Thomas; West, Tristram O.; Denning, A.; Davis, Kenneth J.; Miles, Natasha; Richardson, S. J.; Uliasz, Marek; Lokupitiya, Erandathie; Cooley, Dan; Andrews, Arlyn; Ogle, Stephen

    2013-05-01

    An intensive regional research campaign was conducted by the North American Carbon Program (NACP) in 2005 to study the carbon cycle of the highly productive agricultural regions of the Midwestern United States. Forty-_ve di_erent associated projects were spawned across _ve U.S. agencies over the course of nearly a decade involving hundreds of researchers. The primary objective of the project was to investigate the ability of atmospheric inversion techniques to use highly calibrated CO2 mixing ratio data to estimate CO2 exchange over the major croplands of the U.S. Statistics from densely monitored crop production, consisting primarily corn and soybeans, provided the backbone of a well-studied\\bottom up"flux estimate that was used to evaluate the atmospheric inversion results. Three different inversion systems, representing spatial scales varying from high resolution mesoscale, to continental, to global, coupled to different transport models and optimization techniques were compared to the bottom up" inventory estimates. The mean annual CO2-C sink for 2007 from the inversion systems ranged from 120 TgC to 170 TgC, when viewed across a wide variety of inversion setups, with the best" point estimates ranging from 145 TgC to 155 TgC. Inversion-based mean C sink estimates were generally slightly stronger, but statistically indistinguishable,from the inventory estimate whose mean C sink was 135 TgC. The inversion results showed temporal correlations at seasonal lengths while week to week correlations remained low. Comparisons were made between atmospheric transport yields of the two regional inversion systems, which despite having different influence footprints in space and time due to differences in underlying transport models and external forcings, showed similarity when aggregated in space and time.

  19. INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL

    E-Print Network [OSTI]

    Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

    INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAW E.G.Adelberger, B-1560 KEYWORDS: gravitation, experimental tests of inverse-square law, quantum gravity, extra dimensions ABSTRACT: We review recent experimental tests of the gravitational inverse-square law, and the wide variety

  20. Avoidable Sets in The Bicyclic Inverse Semigroup Nandor Sieben

    E-Print Network [OSTI]

    Sieben, Nándor

    Avoidable Sets in The Bicyclic Inverse Semigroup N´andor Sieben 9/2/2003 Abstract A subset U elements of B. The avoidable sets of the bicyclic inverse semigroup are classified. 1. Introduction If (S avoidable sets in the bicyclic inverse semigroup, which is perhaps the most important inverse semigroup. Its

  1. Joint System Analysis Advisory Committee and Resource

    E-Print Network [OSTI]

    , PPC Dick Adams, PNUCC Sima Beitinjaneh, PORTLAND GENERAL ELECTRIC Villamor B Gamponia, PSE Phillip are not necessarily the cheapest resources by $/MW-yr 11 #12;LP Look-Ahead Projected Resource Additions 12 When the LP

  2. Nome Joint Utility Systems | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg, Oregon: Energy ResourcesJiuyiNobleNoble

  3. Metal-ceramic joint assembly

    DOE Patents [OSTI]

    Li, Jian (New Milford, CT)

    2002-01-01

    A metal-ceramic joint assembly in which a brazing alloy is situated between metallic and ceramic members. The metallic member is either an aluminum-containing stainless steel, a high chromium-content ferritic stainless steel or an iron nickel alloy with a corrosion protection coating. The brazing alloy, in turn, is either an Au-based or Ni-based alloy with a brazing temperature in the range of 9500 to 1200.degree. C.

  4. Discrimination and Identification of UXO by Geophysical Inversion. Phase II: Inversion of Total-Field Magnetics

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    Discrimination and Identification of UXO by Geophysical Inversion. Phase II: Inversion of Total to the discrimination and identification of unexploded ordnance using total-field magnetometry. A black in a predefined library. The discrimination method had the potential to reduce the number of excavations

  5. The Utility-Scale Joint-Venture Program

    SciTech Connect (OSTI)

    Gallup, D.R.; Mancini, T.R.

    1994-06-01

    The Department of Energy`s Utility-Scale Joint-Venture (USJV) Program was developed to help industry commercialize dish/engine electric systems. Sandia National Laboratories developed this program and has placed two contracts, one with Science Applications International Corporation`s Energy Projects Division and one with the Cummins Power Generation Company. In this paper we present the designs for the two dish/Stirling systems that are being developed through the USJV Program.

  6. Inverse Folding of RNA Pseudoknot Structures

    E-Print Network [OSTI]

    Gao, James Z M; Reidys, Christian M

    2010-01-01

    Background: RNA exhibits a variety of structural configurations. Here we consider a structure to be tantamount to the noncrossing Watson-Crick and \\pairGU-base pairings (secondary structure) and additional cross-serial base pairs. These interactions are called pseudoknots and are observed across the whole spectrum of RNA functionalities. In the context of studying natural RNA structures, searching for new ribozymes and designing artificial RNA, it is of interest to find RNA sequences folding into a specific structure and to analyze their induced neutral networks. Since the established inverse folding algorithms, {\\tt RNAinverse}, {\\tt RNA-SSD} as well as {\\tt INFO-RNA} are limited to RNA secondary structures, we present in this paper the inverse folding algorithm {\\tt Inv} which can deal with 3-noncrossing, canonical pseudoknot structures. Results: In this paper we present the inverse folding algorithm {\\tt Inv}. We give a detailed analysis of {\\tt Inv}, including pseudocodes. We show that {\\tt Inv} allows to...

  7. Joint Statement by Energy Ministers of G8, The People's Republic...

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

    Joint Statement by Energy Ministers of G8, The People's Republic of China, India and The Republic of Korea (Energy Efficiency) IEA Response System for Oil Supply Emergencies 2012...

  8. Behaviour of GFRP Adhesive Pipe Joints Subjected to Pressure and Axial Loadings

    E-Print Network [OSTI]

    Lees, Janet M.

    2005-07-05

    The corrosion resistance of glass-fibre reinforced polymers (GFRPs) is a key advantage in pipeline applications. Adhesive bonded joints are often used in tensile resistant GFRP pipe systems and the behaviour of small-diameter GFRP tubular pipe...

  9. International Joint Research Project "Physical Violence and State Legitimacy in Late Socialism"

    E-Print Network [OSTI]

    Schubart, Christoph

    International Joint Research Project "Physical Violence and State Legitimacy in Late Socialism Regensburg Beyond Systemic Divides: Experience and Remembrance of Physical Violence in Soviet and post and the SAP Kosovo Robert Luci, ZZF Potsdam Printing t

  10. Time history analysis of axial forces (Pass Through Forces) at joints in a braced frame

    E-Print Network [OSTI]

    Paschini, Vincent

    2012-01-01

    As buildings keep getting taller, traditional braced lateral systems take more loads. This generates a phenomenon at every joint of a frame called "Pass Through Force". Pass through forces come from the transfer of axial ...

  11. Inversion of marine magnetic anomalies by deconvolution 

    E-Print Network [OSTI]

    Harry, Dennis Lee

    1983-01-01

    magnetization, j(x), with a transfer function, g(x), which is dependant upon the location and orientation of the anomaly profile and the ridge axis relative to the earth's present magnetic field [Bott, 1967]. This is expressed as f(x) f g(x-C) ](C) d0... and Cox, 1972]. The inversion procedure used is to; 1) Numerically transform f(x) into the wavenumber domain, 2) Divide F(k) by the analytical expression for G(k) to obtain J(k), 3) Numerically inverse transform J(k) to obtain J(x). The normalized...

  12. Matrix Inverses Consider the ordinary algebraic equation and its solution shown below

    E-Print Network [OSTI]

    Lee, Carl

    Matrix Inverses Consider the ordinary algebraic equation and its solution shown below: Since the linear system can be written as where , , and , (A = coefficient matrix, x = variable vector, b = constant vector) it is reasonable to ask if the matrix equation corresponding to above system of n linear

  13. Jointly Sponsored Research Program Energy Related Research

    SciTech Connect (OSTI)

    Western Research Institute

    2009-03-31

    Cooperative Agreement, DE-FC26-98FT40323, Jointly Sponsored Research (JSR) Program at Western Research Institute (WRI) began in 1998. Over the course of the Program, a total of seventy-seven tasks were proposed utilizing a total of $23,202,579 in USDOE funds. Against this funding, cosponsors committed $26,557,649 in private funds to produce a program valued at $49,760,228. The goal of the Jointly Sponsored Research Program was to develop or assist in the development of innovative technology solutions that will: (1) Increase the production of United States energy resources - coal, natural gas, oil, and renewable energy resources; (2) Enhance the competitiveness of United States energy technologies in international markets and assist in technology transfer; (3) Reduce the nation's dependence on foreign energy supplies and strengthen both the United States and regional economies; and (4) Minimize environmental impacts of energy production and utilization. Under the JSR Program, energy-related tasks emphasized enhanced oil recovery, heavy oil upgrading and characterization, coal beneficiation and upgrading, coal combustion systems development including oxy-combustion, emissions monitoring and abatement, coal gasification technologies including gas clean-up and conditioning, hydrogen and liquid fuels production, coal-bed methane recovery, and the development of technologies for the utilization of renewable energy resources. Environmental-related activities emphasized cleaning contaminated soils and waters, processing of oily wastes, mitigating acid mine drainage, and demonstrating uses for solid waste from clean coal technologies, and other advanced coal-based systems. Technology enhancement activities included resource characterization studies, development of improved methods, monitors and sensors. In general the goals of the tasks proposed were to enhance competitiveness of U.S. technology, increase production of domestic resources, and reduce environmental impacts associated with energy production and utilization. This report summarizes the accomplishments of the JSR Program.

  14. Joint Center for Artificial Photosynthesis

    ScienceCinema (OSTI)

    Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

    2013-12-19

    The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

  15. Joint DOE-Rosatom Statement

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPA Public CommentInverted Attic9: Johnof Energy JoiningJoint

  16. Introduction Seismic inversion techniques provide us with

    E-Print Network [OSTI]

    Taylor, Mark A J

    Introduction Seismic inversion techniques provide us with information about the wave velocity stratigraphy requires a knowledge of the physical properties, such as the bulk and shear moduli, and the microstructure of media through which the waves travel. Understanding how seismic velocities depend

  17. INVERSION FOR APPLIED GEOPHYSICS: A TUTORIAL

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    velocity, electrical conductivity, or magnetic susceptibility. The appropriate geophysical survey. To obtain that information the data need to be inverted to generate a 3D subsurface distribution principles. Our goal is to present those principles, discuss in detail the essential elements of the inverse

  18. INVERSE SCATTERING PROBLEMS WITH MULTI-FREQUENCIES ...

    E-Print Network [OSTI]

    2015-01-25

    as location, geometry, or material property, from knowledge of the scattered field ... samples), and nano-optics (e.g., design and fabrication of nano-scale optical ... cated structures, and to accurately compute acoustic and electromagnetic fields and ...... sion method for 3D electromagnetic imaging using adjoint fields, Inverse

  19. An inverse of the modular invariant

    E-Print Network [OSTI]

    Semjon Adlaj

    2011-10-14

    During the last few years of his life, Ramanujan had adamantly tried to invert the modular invariant. Subsequent efforts failed until May 30, 2011 when an explicit closed formula for an inverse was presented at the CCRAS (Moscow, Russia). This very formula, along with some special values of the modular invariant, is given in this paper.

  20. Inverse Problems in Engineering (Publisher: Taylor & Francis)

    E-Print Network [OSTI]

    Vajda, Sandor

    detailed Tables of Laplace transform pairs and employing some basic properties. A more recent alternative1 Inverse Problems in Engineering (Publisher: Taylor & Francis) Volume 10, Number 5, Year 2002, pp. Valkó1 and Sandor Vajda2 1 Harold Vance Department of Petroleum Engineering, Texas A&M University mail

  1. Transdimensional Approaches to Geophysical Inverse Problems

    E-Print Network [OSTI]

    Bodin, Thomas

    complicated and quantitative mechanisms with simple qualitative concepts. This research was supported underTransdimensional Approaches to Geophysical Inverse Problems Thomas Bodin October 2010 A thesis Except where otherwise indicated in the text, the research described in this thesis is my own original

  2. High-temperature brazed ceramic joints

    DOE Patents [OSTI]

    Jarvinen, Philip O. (Amherst, NH)

    1986-01-01

    High-temperature joints formed from metallized ceramics are disclosed wherein the metal coatings on the ceramics are vacuum sputtered thereon.

  3. Joint Oceanography-IPRC-JIMAR Seminar

    E-Print Network [OSTI]

    Joint Oceanography-IPRC- JIMAR Seminar Michael A. Spall Senior Scientist Department of Physical Oceanography Woods Hole Oceanographic Institution "Forced Transients in the Thermocline Circulation

  4. Joint Actinide Shock Physics Experimental Research | National...

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

    Experimental Research Joint Actinide Shock Physics Experimental Research The JASPER gas gun at the Nevada National Security Site is used to fire a projectile at a plutonium...

  5. JIBS | Joint Institute for Biological Sciences | ORNL

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

    joint institute is located close to ORNL's Laboratory for Comparative and Functional Genomics, other biomolecular sciences research laboratories, and the Environmental Sciences...

  6. Joint Outreach Task Group Calendar: September 2013

    Broader source: Energy.gov [DOE]

    Joint Outreach Task Group (JOTG)has created a monthly calendar of community events to facilitate interagency and community involvement in these events. September 2013

  7. Constraints on the structure of 16 Cyg A and 16 Cyg B using inversion techniques

    E-Print Network [OSTI]

    Buldgen, G; Dupret, M A

    2015-01-01

    Constraining mixing processes and chemical composition is a central problem in stellar physics as their impact on stellar age determinations leads to biases in our studies of stellar evolution, galactic history and exoplanetary systems. In two previous papers, we showed how seismic inversion techniques could offer strong constraints on such processes by pointing out weaknesses in theoretical models. We now apply our technique to the solar analogues 16CygA and 16CygB, being amongst the best targets in the Kepler field to test the diagnostic potential of seismic inversions. The combination of various seismic indicators helps to provide more constrained and accurate fundamendal parameters for these stars. We use the latest seismic, spectroscopic and interferometric observational constraints in the litterature for this system to determine reference models independently for both stars. We carry out seismic inversions of the acoustic radius, the mean density and a core conditions indicator. We note that a degenerac...

  8. Ceria based inverse opals for thermochemical fuel production: Quantification and prediction of high temperature behavior

    E-Print Network [OSTI]

    Casillas, Danielle Courtney

    2015-01-01

    Angeles Ceria based inverse opals for thermochemical fuelCeria based inverse opals for thermochemical fuelCeria- based inverse opals are currently being investigated

  9. Multidimensional Inverse Scattering with Fixed-Energy Data

    E-Print Network [OSTI]

    Multidimensional Inverse Scattering with Fixed-Energy Data A.G. Ramm Department of Mathematics #12;Multidimensional Inverse Scattering with Fixed-Energy Data 375 0 =/8o p(x)wl(x)w2(x)da'. (**) J

  10. Space and Write Overhead are Inversely Proportional in Flash Memory

    E-Print Network [OSTI]

    Space and Write Overhead are Inversely Proportional in Flash Memory Philipp Brandes Roger overhead are inversely proportional with 1. We also present an algorithm that proves that our analysis proportional law connecting t

  11. Balancing aggregation and smoothing errors in inverse models

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Turner, A. J.; Jacob, D. J.

    2015-01-13

    Inverse models use observations of a system (observation vector) to quantify the variables driving that system (state vector) by statistical optimization. When the observation vector is large, such as with satellite data, selecting a suitable dimension for the state vector is a challenge. A state vector that is too large cannot be effectively constrained by the observations, leading to smoothing error. However, reducing the dimension of the state vector leads to aggregation error as prior relationships between state vector elements are imposed rather than optimized. Here we present a method for quantifying aggregation and smoothing errors as a function ofmore »state vector dimension, so that a suitable dimension can be selected by minimizing the combined error. Reducing the state vector within the aggregation error constraints can have the added advantage of enabling analytical solution to the inverse problem with full error characterization. We compare three methods for reducing the dimension of the state vector from its native resolution: (1) merging adjacent elements (grid coarsening), (2) clustering with principal component analysis (PCA), and (3) applying a Gaussian mixture model (GMM) with Gaussian pdfs as state vector elements on which the native-resolution state vector elements are projected using radial basis functions (RBFs). The GMM method leads to somewhat lower aggregation error than the other methods, but more importantly it retains resolution of major local features in the state vector while smoothing weak and broad features.« less

  12. Balancing aggregation and smoothing errors in inverse models

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Turner, A. J.; Jacob, D. J.

    2015-06-30

    Inverse models use observations of a system (observation vector) to quantify the variables driving that system (state vector) by statistical optimization. When the observation vector is large, such as with satellite data, selecting a suitable dimension for the state vector is a challenge. A state vector that is too large cannot be effectively constrained by the observations, leading to smoothing error. However, reducing the dimension of the state vector leads to aggregation error as prior relationships between state vector elements are imposed rather than optimized. Here we present a method for quantifying aggregation and smoothing errors as a function ofmore »state vector dimension, so that a suitable dimension can be selected by minimizing the combined error. Reducing the state vector within the aggregation error constraints can have the added advantage of enabling analytical solution to the inverse problem with full error characterization. We compare three methods for reducing the dimension of the state vector from its native resolution: (1) merging adjacent elements (grid coarsening), (2) clustering with principal component analysis (PCA), and (3) applying a Gaussian mixture model (GMM) with Gaussian pdfs as state vector elements on which the native-resolution state vector elements are projected using radial basis functions (RBFs). The GMM method leads to somewhat lower aggregation error than the other methods, but more importantly it retains resolution of major local features in the state vector while smoothing weak and broad features.« less

  13. Technical status of the Dish/Stirling Joint Venture Program

    SciTech Connect (OSTI)

    Bean, J.R.; Diver, R.B.

    1995-06-01

    Initiated in 1991; the Dish/Stirling Joint Venture Program (DSJVP) is a 5-year, $17.2 million joint venture which is funded by Cummins Power Generation, Inc. (CPG) of Columbus, Indiana and the United States Department of Energy`s (DOE) Solar Thermal and Biomass Power Division. Sandia National Laboratories administers and provides technical management for this contract on the DOE`s behalf. In January, 1995; CPG advanced to Phase 3 of this three-phase contract. The objective of the DSJVP is to develop and commercialize a 7-kW. Dish/Stirling System for remote power markets by 1997. In this paper, the technical status of the major subsystems which comprise the CPG 7-kW{sub e} Dish/Stirling System is presented. These subsystems include the solar concentrator, heat pipe receiver, engine/alternator, power conditioning, and automatic controls.

  14. Inverse Load Calculation of Wind Turbine Support Structures - A Numerical Verification Using the Comprehensive Simulation Code FAST: Preprint (Revised)

    SciTech Connect (OSTI)

    Pahn, T.; Jonkman, J.; Rolges, R.; Robertson, A.

    2012-11-01

    Physically measuring the dynamic responses of wind turbine support structures enables the calculation of the applied loads using an inverse procedure. In this process, inverse means deriving the inputs/forces from the outputs/responses. This paper presents results of a numerical verification of such an inverse load calculation. For this verification, the comprehensive simulation code FAST is used. FAST accounts for the coupled dynamics of wind inflow, aerodynamics, elasticity and turbine controls. Simulations are run using a 5-MW onshore wind turbine model with a tubular tower. Both the applied loads due to the instantaneous wind field and the resulting system responses are known from the simulations. Using the system responses as inputs to the inverse calculation, the applied loads are calculated, which in this case are the rotor thrust forces. These forces are compared to the rotor thrust forces known from the FAST simulations. The results of these comparisons are presented to assess the accuracy of the inverse calculation. To study the influences of turbine controls, load cases in normal operation between cut-in and rated wind speed, near rated wind speed and between rated and cut-out wind speed are chosen. The presented study shows that the inverse load calculation is capable of computing very good estimates of the rotor thrust. The accuracy of the inverse calculation does not depend on the control activity of the wind turbine.

  15. Nonlinear Integral Equations for the Inverse Problem in Corrosion ...

    E-Print Network [OSTI]

    2012-06-15

    Nonlinear Integral Equations for the Inverse. Problem in Corrosion Detection from Partial. Cauchy Data. Fioralba Cakoni. Department of Mathematical Sciences, ...

  16. Traveltime inversion of vertical radar profiles William P. Clement1

    E-Print Network [OSTI]

    Barrash, Warren

    , damped, least-squares inversion scheme. We assess the accuracy of the velocity model using syn- thetic

  17. Ph.D.Thesis Binary inversion of gravity

    E-Print Network [OSTI]

    Ph.D.Thesis Binary inversion of gravity data for salt imaging Richard A. Krahenbuhl Center of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem CGEM #12;#12;Ph.D.Thesis Binary inversion) #12;#12;BINARY INVERSION OF GRAVITY DATA FOR SALT IMAGING by Richard A. Krahenbuhl #12;#12;ii A thesis

  18. ARC Discovery (Joint PhD)

    E-Print Network [OSTI]

    Wang, Yan

    PhD) (Cotutelle) · 2010(MQRES) 2.252009 10% · 2010 · 1.8 1.32012 www.international.mq.edu.au/researchCRICOS Code 00002J " 2014 200 (COREs) " Jim Piper 20091600 (MQRES) (Cotutelle) (Joint PhD) MICHELLEWILSON 20102651 104(Cotutelle) (Joint PhD) #12; (COREs) (Ancient Cultures) -- (Animal Behaviour

  19. High temperature ceramic/metal joint structure

    DOE Patents [OSTI]

    Boyd, Gary L. (Tempe, AZ)

    1991-01-01

    A high temperature turbine engine includes a hybrid ceramic/metallic rotor member having ceramic/metal joint structure. The disclosed joint is able to endure higher temperatures than previously possible, and aids in controlling heat transfer in the rotor member.

  20. Optical inverse-square displacement sensor

    DOE Patents [OSTI]

    Howe, R.D.; Kychakoff, G.

    1989-09-12

    This invention comprises an optical displacement sensor that uses the inverse-square attenuation of light reflected from a diffused surface to calculate the distance from the sensor to the reflecting surface. Light emerging from an optical fiber or the like is directed onto the surface whose distance is to be measured. The intensity I of reflected light is angle dependent, but within a sufficiently small solid angle it falls off as the inverse square of the distance from the surface. At least a pair of optical detectors are mounted to detect the reflected light within the small solid angle, their ends being at different distances R and R + [Delta]R from the surface. The distance R can then be found in terms of the ratio of the intensity measurements and the separation length as given in an equation. 10 figs.

  1. Inverse folding of RNA pseudoknot structures

    E-Print Network [OSTI]

    Gao, James Z M; Reidys, Christian M

    2009-01-01

    Results: In this paper we present the inverse folding algorithm {\\tt inv} as well as two applications. We give a detailed analysis of {\\tt inv}, including pseudocodes. The algorithm is freely available at \\url{http://www.combinatorics.cn/cbpc/inv.html}. We show, using 3-noncrossing nonplanar RNA pseudoknot structures as an example, that {\\tt inv} allows to design specific 3-noncrossing RNA structures. Furthermore we use {\\tt inv} for estimating the distance of the neutral networks. Conclusions: The algorithm {\\tt inv} extends inverse folding capabilities to RNA pseudoknot structures. In comparison with {\\tt RNAinverse} it uses new ideas, for instance by taking sets of competing structures into consideration. As a result, {\\tt inv} is able to find novel sequences even for RNA secondary structures.

  2. Regularity of mappings inverse to Sobolev mappings

    SciTech Connect (OSTI)

    Vodop'yanov, Sergei K [S.L. Sobolev Institute for Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (Russian Federation)

    2012-10-31

    For homeomorphisms {phi}:{Omega}{yields}{Omega}' on Euclidean domains in R{sup n}, n{>=}2, necessary and sufficient conditions ensuring that the inverse mapping belongs to a Sobolev class are investigated. The result obtained is used to describe a new two-index scale of homeomorphisms in some Sobolev class such that their inverses also form a two-index scale of mappings, in another Sobolev class. This scale involves quasiconformal mappings and also homeomorphisms in the Sobolev class W{sup 1}{sub n-1} such that rankD{phi}(x){<=}n-2 almost everywhere on the zero set of the Jacobian det D{phi}(x). Bibliography: 65 titles.

  3. On some inverse problems in nuclear physics

    E-Print Network [OSTI]

    B. Z. Belashev; M. K. Suleymanov

    2001-10-23

    Some inverse problems in high-energy physics, neutron diffraction and NMR spectroscopy are discussed. To solve them, the Fourier integrated transformation method and the Maximum Entropy Technique (MENT) were used. The integrated images of experimental distributions are shown to be informative when determining the space-time parameters of a particle generation zone and when analysing blurred spectra. The efficiency of the above methods was checked by comparing relevant results with the results obtained independently.

  4. Lagrange Inversion via Transforms Heinrich Niederhausen

    E-Print Network [OSTI]

    Niederhausen, Heinrich

    is called the order of , n = ord( ), and the set of all Laurent series is denoted by K btc. As indicated in K btc is de...ned as multiplication of series. A multi- plicative inverse (reciprocal) exists in K btc 0 K btc, the set of all Laurent series where the ...rst non-zero term is a unit in K, i.e. has

  5. Adaptive complexity regularization for linear inverse problems

    E-Print Network [OSTI]

    Loubes, Jean-Michel

    2008-01-01

    We tackle the problem of building adaptive estimation procedures for ill-posed inverse problems. For general regularization methods depending on tuning parameters, we construct a penalized method that selects the optimal smoothing sequence without prior knowledge of the regularity of the function to be estimated. We provide for such estimators oracle inequalities and optimal rates of convergence. This penalized approach is applied to Tikhonov regularization and to regularization by projection.

  6. United States and France Sign Joint Statement on Civil Liability...

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

    and France Sign Joint Statement on Civil Liability for Nuclear Damage United States and France Sign Joint Statement on Civil Liability for Nuclear Damage Joint Statement Signed.pdf...

  7. Data-Driven Combined State and Parameter Reduction for Extreme-Scale Inverse Problems

    E-Print Network [OSTI]

    Preprint Data-Driven Combined State and Parameter Reduction for Extreme-Scale Inverse Problems Christian Himpe Mario Ohlberger Abstract In this contribution we present an accelerated optimization-based ap- proach for combined state and parameter reduction of a parametrized lin- ear control system which

  8. Figure 5 : Inversed attenuation tomography The Fresnel volume thus defined, also called Frchet kernel

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Figure 5 : Inversed attenuation tomography The Fresnel volume thus defined, also called Fréchet system with the LSQR algorithm : Because the size of the Fresnel volume thus defined is dependent propose to compute the Fresnel weights for a monochromatic wave, increasing its frequency at each step

  9. Mapping of North American methane emissions with high spatial resolution by inversion

    E-Print Network [OSTI]

    , 2 Jet Propulsion Laboratory/California Institute of Technology, Pasadena, California, USA, 3 Department of Chemistry, University of California, Irvine, California, USA Abstract We estimate methane System Chemistry (GEOS-Chem) chemical transport model and its adjoint. The inversion focuses on summer

  10. The inverse problems of wing panel manufacture processes

    SciTech Connect (OSTI)

    Oleinikov, A. I.; Bormotin, K. S.

    2013-12-16

    It is shown that inverse problems of steady-state creep bending of plates in both the geometrically linear and nonlinear formulations can be represented in a variational formulation. Steady-state values of the obtained functionals corresponding to the solutions of the problems of inelastic deformation and springback are determined by applying a finite element procedure to the functionals. Optimal laws of creep deformation are formulated using the criterion of minimizing damage in the functionals of the inverse problems. The formulated problems are reduced to the problems solved by the finite element method using MSC.Marc software. Currently, forming of light metals poses tremendous challenges due to their low ductility at room temperature and their unusual deformation characteristics at hot-cold work: strong asymmetry between tensile and compressive behavior, and a very pronounced anisotropy. We used the constitutive models of steady-state creep of initially transverse isotropy structural materials the kind of the stress state has influence. The paper gives basics of the developed computer-aided system of design, modeling, and electronic simulation targeting the processes of manufacture of wing integral panels. The modeling results can be used to calculate the die tooling, determine the panel processibility, and control panel rejection in the course of forming.

  11. Joint Fuel Cell Technologies and Advanced Manufacturing Webinar...

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

    the presentation slides from the "Joint Fuel Cell Technologies Office and Advanced Manufacturing Office Webinar" held November 20, 2012. Joint Fuel Cell Technologies Office and...

  12. United States and Japan Sign Joint Nuclear Energy Action Plan...

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

    Japan Sign Joint Nuclear Energy Action Plan to Promote Nuclear Energy Cooperation United States and Japan Sign Joint Nuclear Energy Action Plan to Promote Nuclear Energy...

  13. New Report Describes Joint Opportunities for Natural Gas and...

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

    Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel Cell Vehicle Markets New Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel Cell Vehicle...

  14. Illumina Production Sequencing at DOE Joint Genome Institute

    E-Print Network [OSTI]

    Tarver, Angela

    2014-01-01

    Production Sequencing at DOE Joint Genome Institute Angelathe US Department of Energy (DOE) Joint Genome Institute isthe Office of Science of the DOE under Contract Number DE-

  15. Fifth National Report for the Joint Convention on the Safety...

    Office of Environmental Management (EM)

    Fifth National Report for the Joint Convention on the Safety of Spent Fuel Management and the Safety of Radioactive Waste Management Fifth National Report for the Joint Convention...

  16. Fourth National Report for the Joint Convention on the Safety...

    Office of Environmental Management (EM)

    Fourth National Report for the Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management Fourth National Report for the Joint...

  17. Second National Report for the Joint Convention on the Safety...

    Office of Environmental Management (EM)

    Second National Report for the Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management Second National Report for the Joint...

  18. National Report Joint Convention on the Safety of Spent Fuel...

    Office of Environmental Management (EM)

    National Report Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management National Report Joint Convention on the Safety of Spent...

  19. Third National Report for the Joint Convention on the Safety...

    Office of Environmental Management (EM)

    Third National Report for the Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management Third National Report for the Joint...

  20. Sealed joint structure for electrochemical device

    DOE Patents [OSTI]

    Tucker, Michael C; Jacobson, Craig P; De Jonghe, Lutgard C; Visco, Steven J

    2013-05-21

    Several members make up a joint in a high-temperature electrochemical device, wherein the various members perform different functions. The joint is useful for joining multiple cells (generally tubular modules) of an electrochemical device to produce a multi-cell segment-in-series stack for a solid oxide fuel cell, for instance. The joint includes sections that bond the joining members to each other; one or more seal sections that provide gas-tightness, and sections providing electrical connection and/or electrical insulation between the various joining members. A suitable joint configuration for an electrochemical device has a metal joint housing, a first porous electrode, a second porous electrode, separated from the first porous electrode by a solid electrolyte, and an insulating member disposed between the metal joint housing and the electrolyte and second electrode. One or more brazes structurally and electrically connects the first electrode to the metal joint housing and forms a gas tight seal between the first electrode and the second electrode.

  1. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields: Stochastic inversion of AVA and CSEM data

    E-Print Network [OSTI]

    Chen, J.

    2013-01-01

    reservoir distributions of porosity, water saturation, etc.reservoir with relatively high porosity, low water saturationreservoir properties such as porosity and water saturation,

  2. Modeling brine-rock interactions in an enhanced geothermal system deep fractured reservoir at Soultz-Sous-Forets (France): a joint approach using two geochemical codes: frachem and toughreact

    E-Print Network [OSTI]

    Andre, Laurent; Spycher, Nicolas; Xu, Tianfu; Vuataz, Francois-D.; Pruess, Karsten.

    2006-01-01

    in enhanced geothermal systems (EGS). Proceedings 31 thmodeling for geothermal systems: predicting carbonate andTHC) processes in geothermal systems is complicated by

  3. Modeling brine-rock interactions in an enhanced geothermal system deep fractured reservoir at Soultz-Sous-Forets (France): a joint approach using two geochemical codes: frachem and toughreact

    E-Print Network [OSTI]

    Andre, Laurent; Spycher, Nicolas; Xu, Tianfu; Vuataz, Francois-D.; Pruess, Karsten.

    2006-01-01

    rock interactions in enhanced geothermal systems (EGS).the study of enhanced geothermal systems (EGS) to forecastrate, porosity, Enhanced Geothermal System (EGS), Soultz-

  4. Nuclear Thermal Propulsion: A Joint NASA/DOE/DOD Workshop

    SciTech Connect (OSTI)

    Clark, J.S.

    1991-01-01

    Papers presented at the joint NASA/DOE/DOD workshop on nuclear thermal propulsion are compiled. The following subject areas are covered: nuclear thermal propulsion programs; Rover/NERVA and NERVA systems; Low Pressure Nuclear Thermal Rocket (LPNTR); particle bed reactor nuclear rocket; hybrid propulsion systems; wire core reactor; pellet bed reactor; foil reactor; Droplet Core Nuclear Rocket (DCNR); open cycle gas core nuclear rockets; vapor core propulsion reactors; nuclear light bulb; Nuclear rocket using Indigenous Martian Fuel (NIMF); mission analysis; propulsion and reactor technology; development plans; and safety issues.

  5. Remote controlled vacuum joint closure mechanism

    DOE Patents [OSTI]

    Doll, David W. (San Diego, CA); Hager, E. Randolph (La Jolla, CA)

    1986-01-01

    A remotely operable and maintainable vacuum joint closure mechanism for a noncircular aperture is disclosed. The closure mechanism includes an extendible bellows coupled at one end to a noncircular duct and at its other end to a flange assembly having sealed grooves for establishing a high vacuum seal with the abutting surface of a facing flange which includes an aperture forming part of the system to be evacuated. A plurality of generally linear arrangements of pivotally coupled linkages and piston combinations are mounted around the outer surface of the duct and aligned along the length thereof. Each of the piston/linkage assemblies is adapted to engage the flange assembly by means of a respective piston and is further coupled to a remote controlled piston drive shaft to permit each of the linkages positioned on a respective flat outer surface of the duct to simultaneously and uniformly displace a corresponding piston and the flange assembly with which it is in contact along the length of the duct in extending the bellows to provide a high vacuum seal between the movable flange and the facing flange. A plurality of latch mechanisms are also pivotally mounted on the outside of the duct. A first end of each of the latch mechanisms is coupled to a remotely controlled latch control shaft for displacing the latch mechanism about its pivot point. In response to the pivoting displacement of the latch mechanism, a second end thereof is displaced so as to securely engage the facing flange.

  6. The Lorentz Integral Transform and its Inversion

    E-Print Network [OSTI]

    N. Barnea; V. D. Efros; W. Leidemann; G. Orlandini

    2009-12-23

    The Lorentz integral transform method is briefly reviewed. The issue of the inversion of the transform, and in particular its ill-posedness, is addressed. It is pointed out that the mathematical term ill-posed is misleading and merely due to a historical misconception. In this connection standard regularization procedures for the solution of the integral transform problem are presented. In particular a recent one is considered in detail and critical comments on it are provided. In addition a general remark concerning the concept of the Lorentz integral transform as a method with a controlled resolution is made.

  7. Note: Low energy inverse photoemission spectroscopy apparatus

    SciTech Connect (OSTI)

    Yoshida, Hiroyuki, E-mail: yoshida@e.kuicr.kyoto-u.ac.jp [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan)] [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan)

    2014-01-15

    An apparatus for the low-energy inverse photoemission spectroscopy is described. In this technique, low energy electron having kinetic energy below 4 eV is incident to the sample and detect the emitted photons in the near ultraviolet range (below 5 eV, longer than 250 nm) to investigate the unoccupied states of the solid materials. Compared with the prototype apparatus reported previously [H. Yoshida, Chem. Phys. Lett. 539–540, 180–185 (2012)], the collection efficiency of photons is improved by a factor of four and practically any conductive substrates can be used. The overall resolution is 0.27 eV.

  8. Joint Genome Institute's Automation Approach and History

    SciTech Connect (OSTI)

    Roberts, Simon

    2006-07-05

    Department of Energy/Joint Genome Institute (DOE/JGI) collaborates with DOE national laboratories and community users, to advance genome science in support of the DOE missions of clean bio-energy, carbon cycling, and bioremediation.

  9. Joint Genome Institute's Automation Approach and History

    E-Print Network [OSTI]

    Roberts, Simon

    2006-01-01

    DOE & NIH present their joint HGP plan to Congress. The 15-staff from LLNL & LBNL. 2000 HGP leaders & President Clintonof the 21st century. ” 2003 HGP completed and published.

  10. Joint Actinide Shock Physics Experimental Research - JASPER

    SciTech Connect (OSTI)

    2014-10-31

    Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

  11. Joint Actinide Shock Physics Experimental Research - JASPER

    ScienceCinema (OSTI)

    None

    2015-01-09

    Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

  12. IJCNLP 2008 Third International Joint Conference

    E-Print Network [OSTI]

    IJCNLP 2008 Third International Joint Conference on Natural Language Processing Proceedings of the Conference Organizer Asian Federation of Natural Language Processing Local Host International Institute Organization Council for Scientific and Industrial Research #12;Preface: Conference Chair Dear colleagues

  13. Joint microseismic event location with uncertain velocity

    E-Print Network [OSTI]

    Poliannikov, Oleg V.

    2013-01-01

    We study the problem of the joint location of seismic events using an array of receivers. We show that locating multiple seismic events simultaneously is advantageous compared to the more traditional approaches of locating ...

  14. Mouse models of osteoarthritis and joint injury

    E-Print Network [OSTI]

    Avedillo, Jose Enrique

    2012-01-01

    Nearly 21 million Americans are affected by osteoarthritis, a complex disease characterized by degenerative lesions to the articular cartilage and subchondral bone in the joints. The complexity of the disease makes the use ...

  15. Chirped pulse inverse free-electron laser vacuum accelerator

    DOE Patents [OSTI]

    Hartemann, Frederic V. (Dublin, CA); Baldis, Hector A. (Pleasanton, CA); Landahl, Eric C. (Walnut Creek, CA)

    2002-01-01

    A chirped pulse inverse free-electron laser (IFEL) vacuum accelerator for high gradient laser acceleration in vacuum. By the use of an ultrashort (femtosecond), ultrahigh intensity chirped laser pulse both the IFEL interaction bandwidth and accelerating gradient are increased, thus yielding large gains in a compact system. In addition, the IFEL resonance condition can be maintained throughout the interaction region by using a chirped drive laser wave. In addition, diffraction can be alleviated by taking advantage of the laser optical bandwidth with negative dispersion focusing optics to produce a chromatic line focus. The combination of these features results in a compact, efficient vacuum laser accelerator which finds many applications including high energy physics, compact table-top laser accelerator for medical imaging and therapy, material science, and basic physics.

  16. Inverse time-of-flight spectrometer for beam plasma research

    SciTech Connect (OSTI)

    Yushkov, Yu. G., E-mail: yuyushkov@gmail.com; Zolotukhin, D. B.; Tyunkov, A. V. [Tomsk State University of Control Systems and Radioelectronics, 40 Lenin Ave., Tomsk 634050 (Russian Federation); Oks, E. M. [Tomsk State University of Control Systems and Radioelectronics, 40 Lenin Ave., Tomsk 634050 (Russian Federation); Institute of High Current Electronics SB RAS, 2/3, Akademichesky Ave., Tomsk 634055 (Russian Federation); Savkin, K. P. [Institute of High Current Electronics SB RAS, 2/3, Akademichesky Ave., Tomsk 634055 (Russian Federation)

    2014-08-15

    The paper describes the design and principle of operation of an inverse time-of-flight spectrometer for research in the plasma produced by an electron beam in the forevacuum pressure range (5–20 Pa). In the spectrometer, the deflecting plates as well as the drift tube and the primary ion beam measuring system are at high potential with respect to ground. This provides the possibility to measure the mass-charge constitution of the plasma created by a continuous electron beam with a current of up to 300 mA and electron energy of up to 20 keV at forevacuum pressures in the chamber placed at ground potential. Research results on the mass-charge state of the beam plasma are presented and analyzed.

  17. Classical and quantum dynamics in an inverse square potential

    SciTech Connect (OSTI)

    Guillaumín-Espańa, Elisa; Núńez-Yépez, H. N.; Salas-Brito, A. L.

    2014-10-15

    The classical motion of a particle in a 3D inverse square potential with negative energy, E, is shown to be geodesic, i.e., equivalent to the particle's free motion on a non-compact phase space manifold irrespective of the sign of the coupling constant. We thus establish that all its classical orbits with E < 0 are unbounded. To analyse the corresponding quantum problem, the Schrödinger equation is solved in momentum space. No discrete energy levels exist in the unrenormalized case and the system shows a complete “fall-to-the-center” with an energy spectrum unbounded by below. Such behavior corresponds to the non-existence of bound classical orbits. The symmetry of the problem is SO(3) × SO(2, 1) corroborating previously obtained results.

  18. Approaching the Island of Inversion: 34P

    SciTech Connect (OSTI)

    Bender, P.C.; Hoffman, C.R.; Wiedeking, M.; Allmond, J.M.; Bernstein, L.A.; Burke, J.T.; Bleuel, D.L.; Clark, R.M.; Fallon, P.; Goldblum, B.L.; Hinners, T.A.; Jeppesen, H.B.; Lee, Sangjin; Lee, I.Y.; Lesher, S.R.; Machiavelli, A.O.; McMahan, M.A.; Morris, D.; Perry, M.; Phair, L.; Scielzo, N.D.; Tabor, S.L.; Tripathi, Vandana; Volya, A.

    2011-06-14

    Yrast states in 34P were investigated using the 18O(18O,pn) reaction at energies of 20, 24, 25, 30, and 44 MeV at Florida State University and at Lawrence Berkeley National Laboratory. The level scheme was expanded, ray angular distributions were measured, and lifetimes were inferred with the Doppler-shift attenuation method by detecting decay protons in coincidence with one or more rays. The results provide a clearer picture of the evolution of structure approaching the 'Island of Inversion', particularly how the 1 and 2 particle-hole (ph) states fall in energy with increasing neutro number approaching inversion. However, the agreement of the lowest few states with pure sd shell model predictions shows that the level scheme of 34P is not itself inverted. Rather, the accumulated evidence indicates that the 1-ph states start at 2.3 MeV. A good candidate for the lowest 2-ph state lies at 6236 keV, just below the neutron separation energy of 6291 keV. Shell model calculations made using a small modification of the WBP interaction reproduce the negative-parity, 1-ph states rather well.

  19. A generalization of Szebehely's inverse problem of dynamics

    E-Print Network [OSTI]

    W. Sarlet; T. Mestdag; G. Prince

    2013-05-14

    The so-called inverse problem of dynamics is about constructing a potential for a given family of curves. We observe that there is a more general way of posing the problem by making use of ideas of another inverse problem, namely the inverse problem of the calculus of variations. We critically review and clarify different aspects of the current state of the art of the problem (mainly restricted to the case of planar curves), and then develop our more general approach.

  20. Stochastic spectral methods for Bayesian inference in inverse ...

    E-Print Network [OSTI]

    ... CA The Bayesian approach to inverse problems provides a foundation for inference from noisy and limited data, a natural mechanism for regularization in the ...

  1. The Inverse Problem for Derivative Securities of Interest Rate

    E-Print Network [OSTI]

    2008-02-02

    May 26, 2000 ... Market price for risk of interest rate reflects the close relation between risk and yield of securities dependent on interest rate. An inverse problem.

  2. Importance of Elevation and Temperature Inversions for the Interpretat...

    Open Energy Info (EERE)

    Importance of Elevation and Temperature Inversions for the Interpretation of Thermal Infrared Satellite Images Used in Geothermal Exploration Jump to: navigation, search OpenEI...

  3. Numerical solution of an inverse medium scattering problem with a ...

    E-Print Network [OSTI]

    G Bao et al

    2010-06-29

    Jul 1, 2010 ... computational resources over the corresponding classical inverse ... model problems; energy estimates of the wave fields are obtained; a PML ...

  4. Globally strictly convex cost functional for an inverse parabolic problem

    E-Print Network [OSTI]

    Michael V. Klibanov; Vladimir G. Kamburg

    2015-02-04

    A coefficient inverse problem for a parabolic equation is considered. Using a Carleman Weight Function, a globally strictly convex cost functional is constructed for this problem.

  5. Inversion of synthetic aperture radar interferograms for sources...

    Open Energy Info (EERE)

    Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Jump to: navigation, search OpenEI Reference...

  6. A Target-Oriented Magnetotelluric Inversion Approach For Characterizin...

    Open Energy Info (EERE)

    drilled to establish an in situ laboratory to investigate the potential for geothermal energy production. Classical 2-D smooth inversion of the MT data, recorded along two...

  7. MIT Joint Program on the Science and Policy of Global Change

    E-Print Network [OSTI]

    MIT Joint Program on the Science and Policy of Global Change The EU's Emissions Trading Scheme on recycled paper #12;1 The EU's Emissions Trading Scheme: A Prototype Global System? Denny Ellerman* Abstract The European Union's Emission Trading Scheme (EU ETS) is the world's first multinational cap- and-trade system

  8. Rock Joint Surfaces Measurement and Analysis of Aperture Distribution under Different Normal and Shear Loading Using GIS

    E-Print Network [OSTI]

    Sharifzadeh, Mostafa; Esaki, Tetsuro

    2009-01-01

    Geometry of the rock joint is a governing factor for joint mechanical and hydraulic behavior. A new method of evaluating aperture distribution based on measurement of joint surfaces and three dimensional characteristics of each surface is developed. Artificial joint of granite surfaces are measured,processed, analyzed and three dimensional approaches are carried out for surface characterization. Parameters such as asperity's heights, slope angles, and aspects distribution at micro scale,local concentration of elements and their spatial localization at local scale are determined by Geographic Information System (GIS). Changes of aperture distribution at different normal stresses and various shear displacements are visualized and interpreted. Increasing normal load causes negative changes in aperture frequency distribution which indicates high joint matching. However, increasing shear displacement causes a rapid increase in the aperture and positive changes in the aperture frequency distribution which could be ...

  9. Modeling brine-rock interactions in an enhanced geothermal system deep fractured reservoir at Soultz-Sous-Forets (France): a joint approach using two geochemical codes: frachem and toughreact

    E-Print Network [OSTI]

    Andre, Laurent; Spycher, Nicolas; Xu, Tianfu; Vuataz, Francois-D.; Pruess, Karsten.

    2006-01-01

    geothermal systems (EGS). Proceedings 31 th Workshop onenhanced geothermal systems (EGS) to forecast the long-termdeveloped to investigate EGS, were applied to model the same

  10. Qualification of the Joints for the ITER Central Solenoid

    SciTech Connect (OSTI)

    Martovetsky, N; Berryhill, A; Kenney, S

    2011-09-01

    The ITER Central Solenoid has 36 interpancake joints, 12 bus joints, and 12 feeder joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The US ITER Project Office developed two different types of interpancake joints with some variations in details in order to find a better design, qualify the joints, and establish a fabrication process. We built and tested four samples of the sintered joints and two samples with butt-bonded joints (a total of eight joints). Both designs met the specifications. Results of the joint development, test results, and selection of the baseline design are presented and discussed in the paper. The ITER Central Solenoid (CS) consists of six modules. Each module is composed of six wound hexapancakes and one quadrapancake. The multipancakes are connected electrically and hydraulically by in-line interpancake joints. The joints are located at the outside diameter (OD) of the module. Cable in conduit conductor (CICC) high-current joints are critical elements in the CICC magnets. In addition to low resistivity, the CS joints must fit a space envelope equivalent to the regular conductor cross section and must have low hydraulic impedance and enough structural strength to withstand the hoop and compressive forces during operation, including cycling. This paper is the continuation of the work reported on the intermodule joints.

  11. Inverse transmission problems for magnetic Schrödinger operators

    E-Print Network [OSTI]

    Katsiaryna Krupchyk

    2011-12-16

    This paper is concerned with the study of inverse transmission problems for magnetic Schr\\"odinger operators on bounded domains and in all of the Euclidean space, in the self-adjoint case. Assuming that the magnetic and electric potentials are known outside of a transparent obstacle, in the bounded domain case, we show that the obstacle, the transmission coefficients, as well as the magnetic field and electric potential inside the obstacle are uniquely determined from the knowledge of the set of the Cauchy data for the transmission problem, given on an open subset of the boundary of the domain. In the case of the transmission scattering problem, we obtain the same conclusion, when the scattering amplitude at a fixed frequency is known. The problems studied in this work were proposed in [15].

  12. An inverse problem for Schwinger pair production

    E-Print Network [OSTI]

    Hebenstreit, Florian

    2015-01-01

    The production of electron-positron pairs in time-dependent electric fields (Schwinger mechanism) depends non-linearly on the applied field profile. Accordingly, the resulting momentum spectrum is extremely sensitive to small variations of the field parameters. Owing to this non-linear dependence it is so far unpredictable how to choose a field configuration such that a predetermined momentum distribution is generated. We show that quantum kinetic theory along with optimal control theory can be used to approximately solve this inverse problem for Schwinger pair production. We exemplify this by studying the superposition of a small number of harmonic components resulting in predetermined signatures in the asymptotic momentum spectrum. In the long run, our results could facilitate the observation of this yet unobserved pair production mechanism in quantum electrodynamics by providing suggestions for tailored field configurations.

  13. Supersymmetric inversion of effective-range expansions

    E-Print Network [OSTI]

    Bikashkali Midya; Jérémie Evrard; Sylvain Abramowicz; O. L. Ramírez Suárez; Jean-Marc Sparenberg

    2015-05-26

    A complete and consistent inversion technique is proposed to derive an accurate interaction potential from an effective-range function for a given partial wave in the neutral case. First, the effective-range function is Taylor or Pad\\'e expanded, which allows high precision fitting of the experimental scattering phase shifts with a minimal number of parameters on a large energy range. Second, the corresponding poles of the scattering matrix are extracted in the complex wave-number plane. Third, the interaction potential is constructed with supersymmetric transformations of the radial Schr\\"odinger equation. As an illustration, the method is applied to the experimental phase shifts of the neutron-proton elastic scattering in the $^1S_0$ and $^1D_2$ channels on the $[0-350]$ MeV laboratory energy interval.

  14. Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data

    SciTech Connect (OSTI)

    Huang, Lianjie [Los Alamos National Laboratory; Fehler, Michael [MIT; Malcolm, Alison [MIT; Yang, Di [MIT

    2011-01-01

    Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties resulting from the CO{sub 2} injection and migration can be characterized using waveform inversions of time-lapse seismic data. The conventional approach for analysis using waveform tomography is to take the difference of the images obtained using baseline and subsequent time-lapse datasets that are inverted independently. By contrast, double-difference waveform inversion uses timelapse seismic datasets to jointly invert for reservoir changes. We apply this method to a field time-lapse walkaway VSP data set acquired in 2008 and 2009 for monitoring CO{sub 2} injection at an enhanced oil recovery field at SACROC, Texas. The double-difference waveform inversion gives a cleaner and more easily interpreted image of reservoir changes, as compared to that obtained with the conventional scheme. Our results from the applicatoin of acoustic double-difference waveform tomography shows some zones with decreased P-wave velocity within the reservoir due to CO{sub 2} injection and migration.

  15. Full waveform inversion of solar interior flows

    SciTech Connect (OSTI)

    Hanasoge, Shravan M.

    2014-12-10

    The inference of flows of material in the interior of the Sun is a subject of major interest in helioseismology. Here, we apply techniques of full waveform inversion (FWI) to synthetic data to test flow inversions. In this idealized setup, we do not model seismic realization noise, training the focus entirely on the problem of whether a chosen supergranulation flow model can be seismically recovered. We define the misfit functional as a sum of L {sub 2} norm deviations in travel times between prediction and observation, as measured using short-distance filtered f and p {sub 1} and large-distance unfiltered p modes. FWI allows for the introduction of measurements of choice and iteratively improving the background model, while monitoring the evolution of the misfit in all desired categories. Although the misfit is seen to uniformly reduce in all categories, convergence to the true model is very slow, possibly because it is trapped in a local minimum. The primary source of error is inaccurate depth localization, which, due to density stratification, leads to wrong ratios of horizontal and vertical flow velocities ({sup c}ross talk{sup )}. In the present formulation, the lack of sufficient temporal frequency and spatial resolution makes it difficult to accurately localize flow profiles at depth. We therefore suggest that the most efficient way to discover the global minimum is to perform a probabilistic forward search, involving calculating the misfit associated with a broad range of models (generated, for instance, by a Monte Carlo algorithm) and locating the deepest minimum. Such techniques possess the added advantage of being able to quantify model uncertainty as well as realization noise (data uncertainty).

  16. "Inverse Sandwichâ?ť Complexes of Perhalogenated Cyclohexasilane

    SciTech Connect (OSTI)

    Dai, Xuliang; Shulz, Douglas; Braun, Christopher; Ugrinov, Angel; and Boudjouk, Philip

    2010-04-20

    Perhalogenated cyclohexasilanes, Si{sub 6}X{sub 12} (X = Cl, Br), were prepared by reaction of Si{sub 6}H{sub 12} with molecular chlorine or bromine in cold (-89 C) dichloromethane. Single-crystal structural determination by X-ray analysis shows that the six silicon atoms comprising Si{sub 6}Br{sub 12} adopt a chair conformation in the solid state. The addition of p-tolunitrile to Si{sub 6}X{sub 12} (X = Cl, Br) leads to the rapid formation of colorless precipitates. Si{sub 6}Br{sub 12} 3 2(p-CH{sub 3}C{sub 6}H{sub 4}CN) adopts an 'inverse sandwich' structure where the N atoms of the p-tolunitrile molecules are {micro}{sub 6} bonded and are located above and below the planar hexagonal Si{sub 6} ring. In conclusion, Si{sub 6}X{sub 12} (X = Cl, Br) was synthesized by molecular halogenation of Si{sub 6}H{sub 12} in high yield and good purity. Perhalogenated cyclohexasilanes react with p-tolunitrile to give 'inverse sandwich' adducts 3 and 4 with a planar Si{sub 6} ring upon coordination. Our future reports will detail dianionic adducts based on tetra-n-butylammonium halides as well as a monoanionic adamantyl azide adduct of Si{sub 6}Cl{sub 12}. It is straightforward to conceptualize the utility of Si{sub 6}X{sub 12} {center_dot} Ln chemistry in molecular assembly of silicon-based clusters/tubes/wires. Thereby, we proffer that this constitutes a new landscape in Si chemistry.

  17. Remote controlled vacuum joint closure mechanism

    DOE Patents [OSTI]

    Doll, D.W.; Hager, E.R.

    1984-02-22

    A remotely operable and maintainable vacuum joint closure mechanism for a noncircular aperture is disclosed. The closure mechanism includes an extendible bellows coupled at one end to a noncircular duct and at its other end to a flange assembly having sealed grooves for establishing a high vacuum seal with the abutting surface of a facing flange which includes an aperture forming part of the system to be evacuated. A plurality of generally linear arrangements of pivotally coupled linkages and piston combinations are mounted around the outer surface of the duct and aligned along the length thereof. Each of the piston/linkage assemblies is adapted to engage the flange assembly by means of a respective piston and is further coupled to a remote controlled piston drive shaft to permit each of the linkages positioned on a respective flat outer surface of the duct to simultaneously and uniformly displace a corresponding piston and the flange assembly with which it is in contact along the length of the duct in extending the bellows to provide a high vacuum seal between the movable flange and the facing flange. A plurality of latch mechanisms are also pivotally mounted on the outside of the duct. A first end of each of the latch mechanisms is coupled to a remotely controlled latch control shaft for displacing the latch mechanism about its pivot point. In response to the pivoting displacement of the latch mechanism, a second end thereof is displaced so as to securely engage the facing flange and maintain the high vacuum seal established by the displacement of the flange assembly and extension of the bellows without displacing the entire duct.

  18. Deep Architectures for Articulatory Inversion Benigno Uria1

    E-Print Network [OSTI]

    Edinburgh, University of

    Deep Architectures for Articulatory Inversion Benigno Uria1 , Iain Murray1 , Steve Renals2 , Korin.uria@ed.ac.uk, i.murray@ed.ac.uk, s.renals@ed.ac.uk, korin@cstr.ed.ac.uk Abstract We implement two deep architectures for the acoustic- articulatory inversion mapping problem: a deep neural network and a deep

  19. Some inverse problems around the tokamak Tore Supra Yannick Fischer

    E-Print Network [OSTI]

    Privat, Yannick

    Some inverse problems around the tokamak Tore Supra Yannick Fischer Benjamin Marteau Yannick Privat§ Abstract We consider two inverse problems related to the tokamak Tore Supra through the study for thermonuclear fusion in a tokamak [12]. The second and the third authors are partially supported by the ANR

  20. INVERSE DESIGN OF AIRFOILS BASED ON A NOVEL FORMULATION

    E-Print Network [OSTI]

    Fainekos, Georgios E.

    for a particular class of engineering problems, namely the inverse design of isolated or turbomachinery blade-1- INVERSE DESIGN OF AIRFOILS BASED ON A NOVEL FORMULATION OF THE ANT COLONY OPTIMIZATION METHOD, which are implicit to the ACO techniques, have been modified in order to account for design parameters

  1. DYNAMIC INVERSE PROBLEM IN A WEAKLY LATERALLY INHOMOGENEOUS MEDIUM.

    E-Print Network [OSTI]

    problem is mainly solved by means of the map migration method. The map migration method assumes of an independent way to recover the velocity profile above the interface may hinder the map migration techniques on depth, z, inverse problems of geophysics are often reduced to one-dimensional inverse problems

  2. THE FUKUSHIMA INVERSE PROBLEM Marta Martinez-Camara, Ivan Dokmanic,

    E-Print Network [OSTI]

    Vetterli, Martin

    THE FUKUSHIMA INVERSE PROBLEM Marta Martinez-Camara, Ivan Dokmani´c, Juri Ranieri, Robin Scheibler material was released from Fukushima in March 2011 is crucial to understand the scope of the consequences regular- ization that solves the Fukushima inverse problem blindly. Together with the atmospheric

  3. Inverse Modelling in Geology by Interactive Evolutionary Computation

    E-Print Network [OSTI]

    Boschetti, Fabio

    Inverse Modelling in Geology by Interactive Evolutionary Computation Chris Wijns a,b,, Fabio of geological processes, in the absence of established numerical criteria to act as inversion targets, requires evolutionary computation provides for the inclusion of qualitative geological expertise within a rigorous

  4. Introduction to Inverse Kinematics with Jacobian Transpose, Pseudoinverse and Damped

    E-Print Network [OSTI]

    Chai, Jinxiang

    Introduction to Inverse Kinematics with Jacobian Transpose, Pseudoinverse and Damped Least Squares method, the pseudoinverse method, and the damped least squares methods for inverse kinematics (IK], pseudoinverse methods [45], Jacobian transpose methods [5, 46], the Levenberg-Marquardt damped least squares

  5. Hermitian Quadratic Matrix Polynomials: Solvents and Inverse Problems

    E-Print Network [OSTI]

    Tisseur, Francoise

    Hermitian Quadratic Matrix Polynomials: Solvents and Inverse Problems Peter Lancaster and Fran ISSN 1749-9097 #12;Hermitian Quadratic Matrix Polynomials: Solvents and Inverse Problems$ Peter with prescribed spectral data (eigenvalues and eigenvectors) it is natural to prescribe a right solvent

  6. Computing matrix inversion with optical Cesare Soci,1,*

    E-Print Network [OSTI]

    Zheludev, Nikolay

    Computing matrix inversion with optical networks Kan Wu,1 Cesare Soci,1,* Perry Ping Shum,1 as an analog processor to calculate matrix inversion. A 3x3 matrix is inverted as a proof- ofN matrix, the overall solving time (including setting time of the matrix elements and calculation time

  7. STABILITY OF COUPLED-PHYSICS INVERSE PROBLEMS WITH ...

    E-Print Network [OSTI]

    2014-03-27

    of the form F = ?|?u|p, 0 1, where u is the solution of the elliptic partial differential equation ... 1. Introduction. Couple-physics Inverse Problems or Hybrid Inverse Problems is a research area that is ...... MR 2440857 (2010j:

  8. On Optimizing Joint Inversion of Constrained Geophysical Datasets Anibal Sosa1 Leticia Velazquez1;2, Aaron Velasco3,

    E-Print Network [OSTI]

    Ward, Karen

    of Texas at El Paso, El Paso, Texas 79968-0514, USA 3Department of Geological Sciences, The University) algorithm to characterize 1D earth structure using geophysical datasets with two different optimization

  9. Characterization of heterogeneous near-surface materials by joint 2D inversion of dc resistivity and seismic data

    E-Print Network [OSTI]

    Meju, Max

    multidimensional non- invasive dc resistivity and seismic refraction investigations of the near-surface have and seismic data Luis A. Gallardo1 and Max A. Meju Department of Environmental Science, Lancaster University-gradients of electrical resistivity and seismic velocity as constraints so as to investigate more precisely

  10. Constraining effective rheology through parallel joint geodynamic inversion Tobias S. Baumann , Boris J.P. Kaus, Anton A. Popov

    E-Print Network [OSTI]

    Kaus, Boris

    a synthetic 3D model of salt tectonics with erosion and sedimentation, and check how much noise conditions

  11. Annual Logging Symposium, June 26-29, 2005 JOINT STOCHASTIC INVERSION OF PETROPHYSICAL LOGS AND 3D

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    : APPLICATION TO A GULF- OF-MEXICO DEEPWATER HYDROCARBON RESERVOIR A. Contreras and C. Torres seismic data acquired in the deepwater Gulf of Mexico. Reservoir units consist of stacked turbidite sands and fluid saturation. Both petrophysical logs and elastic-petrophysical correlation cross-plots, together

  12. Joint inversion of surface waves and teleseismic body waves across the Tibetan collision zone: the fate of subducted Indian lithosphere

    E-Print Network [OSTI]

    Nunn, Ceri; Roecker, Steven W.; Priestley, Keith F.; Liang, Xiaofeng; Gilligan, Amy

    2014-09-01

    for traveltimes at shallow depths. 2 GEOTECTONIC SETT ING At the surface, the Tibetan plateau is a relatively uniform area of ?5 km elevation. Its formation involved numerous collisions, and several major sutures formed during the closure of the Tethys ocean (Fig... . Therefore, material accumulating above the transi- tion zone could be left behind and now be observed southwards of any present subduction. The model is not deep enough to determine whether or not a slab has penetrated through the transition zone. However...

  13. SEALING LARGE-DIAMETER CAST-IRON PIPE JOINTS UNDER LIVE CONDITIONS

    SciTech Connect (OSTI)

    Kiran M. Kothari; Gerard T. Pittard

    2005-07-01

    Utilities in the U.S. operate over 75,000 km (47,000 miles) of old cast-iron pipes for gas distribution. Bell-and-spigot joints that connect pipe sections together tend to leak as these pipes age. Current repair practices are costly and highly disruptive. The objective of this program is to design, test and commercialize a robotic system capable of sealing multiple castiron bell and spigot joints from a single pipe entry point. The proposed system will perform repairs with the pipe in service by traveling through the pipe, cleaning each joint surface, and installing a stainless-steel sleeve lined with an epoxy-impregnated felt across the joint. This approach will save considerable time and labor, minimize excavation, avoid traffic disruption, and eliminate any requirement to interrupt service to customers (which would result in enormous expense to utilities). Technical challenges include: (1) repair sleeves must compensate for diametric variation and eccentricity of old cast-iron pipes; (2) the assembly must travel long distances through pipes containing debris; (3) the pipe wall must be effectively cleaned in the immediate area of the joint to assure good bonding of the sleeve; and (4) an innovative bolt-on entry fitting is required to conduct safe repair operations on live mains.

  14. Perturbation Theory and Control in Classical or Quantum Mechanics by an Inversion Formula

    E-Print Network [OSTI]

    Michel Vittot

    2004-06-07

    We consider a perturbation of an ``integrable'' Hamiltonian and give an expression for the canonical or unitary transformation which ``simplifies'' this perturbed system. The problem is to invert a functional defined on the Lie- algebra of observables. We give a bound for the perturbation in order to solve this inversion. And apply this result to a particular case of the control theory, as a first example, and to the ``quantum adiabatic transformation'', as another example.

  15. Investigation of complexity dynamics of inverse and normal homoclinic bifurcation in a glow discharge plasma

    SciTech Connect (OSTI)

    Saha, Debajyoti, E-mail: debajyoti.saha@saha.ac.in; Kumar Shaw, Pankaj; Janaki, M. S.; Sekar Iyengar, A. N.; Ghosh, Sabuj; Mitra, Vramori, E-mail: vramorimitra@yahoo.com; Michael Wharton, Alpha [Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064 (India)] [Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064 (India)

    2014-03-15

    Order-chaos-order was observed in the relaxation oscillations of a glow discharge plasma with variation in the discharge voltage. The first transition exhibits an inverse homoclinic bifurcation followed by a homoclinic bifurcation in the second transition. For the two regimes of observations, a detailed analysis of correlation dimension, Lyapunov exponent, and Renyi entropy was carried out to explore the complex dynamics of the system.

  16. STRUCTURED QUADRATIC INVERSE EIGENVALUE PROBLEM, I. SERIALLY LINKED SYSTEMS

    E-Print Network [OSTI]

    Mathematics, Dalian University of Technology, Dalian, Liaoning, 116024, China. (yubo@dlut.edu.cn) 1 #12

  17. Approximation Methods for Inverse Problems Governed by Nonlinear Parabolic Systems

    E-Print Network [OSTI]

    are given for a model of dioxin uptake and elimination in a distributed liver model that is a special case di erential equations with delays. Motivated by a concrete example for dioxin uptake and transport corresponds to the liver inlet, while x = 1 corresponds to the outlet. Uptake of dioxin into the hepatic cells

  18. MAA-SW / NMMATYC Joint Conference

    E-Print Network [OSTI]

    Borchers, Brian

    MAA-SW / NMMATYC Joint Conference Registration Form New Mexico Tech Socorro, NM April 13-14, 2013. Is this your first NMMATYC conference? Yes No VII. Is this your first MAA Southwestern Section conference? Yes all conference meals: Sun continental breakfast, Sat & Sun lunch, and Sat dinner banquet. VIII. MAA

  19. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto access. Although the Data Management Group will attempt to maintain service at all times and provide regular file Management Group has attempted to ensure the accuracy of the data, the data is provided "as is

  20. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto access of another user. Although the Data Management Group will attempt to maintain service at all times and provide Management Group has assembled the data from various sources and has attempted to ensure the data fields

  1. Joint CQSE and CASTS Seminar Weekly Seminar

    E-Print Network [OSTI]

    Wu, Yih-Min

    :30 TITLE Joint Calibration to Cross-Market Data: A Monte Carlo Approach SPEAKER Prof. Chuan-Hsiang Han, default, and volatility in order to explain market information contained in the term structure of implied and comparisons with some existed calibration methods, for instance Fourier transform method or perturbation

  2. MAA-SW / NMMATYC Joint Conference

    E-Print Network [OSTI]

    Borchers, Brian

    MAA-SW / NMMATYC Joint Conference Presenter Application New Mexico Tech Socorro, NM April 13-Visual Equipment needed: Computer Projector Computer Overhead Projector/Document Camera Internet Access TV / DVD player Other (Please specify): Completed Forms / Questions: Send to: William Stone New Mexico

  3. Joint with application in electrochemical devices

    DOE Patents [OSTI]

    Weil, K Scott [Richland, WA; Hardy, John S [Richland, WA

    2010-09-14

    A joint for use in electrochemical devices, such as solid oxide fuel cells (SOFCs), oxygen separators, and hydrogen separators, that will maintain a hermetic seal at operating temperatures of greater than 600.degree. C., despite repeated thermal cycling excess of 600.degree. C. in a hostile operating environment where one side of the joint is continuously exposed to an oxidizing atmosphere and the other side is continuously exposed to a wet reducing gas. The joint is formed of a metal part, a ceramic part, and a flexible gasket. The flexible gasket is metal, but is thinner and more flexible than the metal part. As the joint is heated and cooled, the flexible gasket is configured to flex in response to changes in the relative size of the metal part and the ceramic part brought about by differences in the coefficient of thermal expansion of the metal part and the ceramic part, such that substantially all of the tension created by the differences in the expansion and contraction of the ceramic and metal parts is absorbed and dissipated by flexing the flexible gasket.

  4. The Trade and Climate Change Joint Agenda

    E-Print Network [OSTI]

    Abstract Climate change, international trade, investment and technology transfer are all issues that haveThe Trade and Climate Change Joint Agenda CEPS Working Document No. 295/June 2008 Thomas L. Brewer............................................................................ 6 3.2 Coverage of the Multilateral Climate and Trade Regimes

  5. 2nd Annual National Joint Tribal Emergency Management Conference...

    Energy Savers [EERE]

    nd Annual National Joint Tribal Emergency Management Conference 2nd Annual National Joint Tribal Emergency Management Conference August 12, 2015 8:00AM PDT to August 14, 2015...

  6. Variation in joint fluid composition and its effect on the tribology of replacement joint articulation

    E-Print Network [OSTI]

    Mazzucco, Daniel Clarke, 1976-

    2003-01-01

    Polyethylene wear is a significant clinical problem limiting the long-term survival of joint replacement prostheses, particularly in total hip arthroplasty (THA) and total knee arthroplasty (TKA). Although the tribology ...

  7. Health monitoring of bolted joints via electrical conductivity measurements

    E-Print Network [OSTI]

    Sevostianov, Igor

    detection of CFRP (Carbon Fiber Reinforced Plastic) bolted joints [9,10] based on the fact that fiber

  8. The quality assurance of heat fused thermoplastic pipeline joints 

    E-Print Network [OSTI]

    Earles, Larry Lee

    1982-01-01

    heat fusion cycle to oroduce an acceptable joint for a given material and determine those conditions for both medium- and high-density polyethylene pipe; and (3) inves- tigate the feasibility of monitoring acoustic emissions duirng the fusion... process and correlating those emissions with joint strength. Joints were constructed with controlled processing conditions. Acoustic emissions were monitored throughout the fusion process. Tensile tests were used to evaluate joint strength...

  9. Microbial Genomics Data from the DOE Joint Genome Institute (JGI)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    As of March 2008, The Joint Genome Institute has released 296 Prokaryotic microbial sites, with 216 in finished status.

  10. Linearized inverse scattering based on seismic Reverse Time Migration

    E-Print Network [OSTI]

    Tim J. P. M. Op 't Root; Christiaan C. Stolk; Maarten V. de Hoop

    2011-01-21

    In this paper we study the linearized inverse problem associated with imaging of reflection seismic data. We introduce an inverse scattering transform derived from reverse-time migration (RTM). In the process, the explicit evaluation of the so-called normal operator is avoided, while other differential and pseudodifferential operator factors are introduced. We prove that, under certain conditions, the transform yields a partial inverse, and support this with numerical simulations. In addition, we explain the recently discussed 'low-frequency artifacts' in RTM, which are naturally removed by the new method.

  11. MIT Joint Program on the Science and Policy of Global Change

    E-Print Network [OSTI]

    MIT Joint Program on the Science and Policy of Global Change Emissions Trading to Reduce Greenhouse://mit.edu/globalchange/ Printed on recycled paper #12;Emissions Trading to Reduce Greenhouse Gas Emissions in the United States, allowances acquired from foreign emissions trading systems, and from a special incentive program

  12. Joint Supply, Demand, and Energy Storage Management Towards Microgrid Cost Minimization

    E-Print Network [OSTI]

    Liang, Ben

    Joint Supply, Demand, and Energy Storage Management Towards Microgrid Cost Minimization Sun Sun balancing in a grid- connected microgrid is studied. We consider a microgrid pow- ered by a conventional) unit. An aggregator operates the microgrid and aims to minimize the long-term system cost, including

  13. IJCB 2011 Conference Report The International Joint Conference on Biometrics represents the joining of two major

    E-Print Network [OSTI]

    Bowyer, Kevin W.

    IJCB 2011 Conference Report The International Joint Conference on Biometrics represents the joining of two major conference series in biometrics research, the Biometrics Theory, Applications and Systems (BTAS) tradition and the International Conference on Biometrics (ICB) tradition. Measured by the number

  14. Universal Composition with Joint State Ran Canetti y Tal Rabin y

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    attempting to analyze the entire system as a single unit, we would like to be able to analyze each . . . . . . . . . . . . . . . . 3 2 Review of the UC framework 4 3 Universal Composition with Joint State (JUC) 5 4 Application to Protocols in the CRS Model 7 4.1 Commitment in the CRS Model

  15. Considering Passive Joints in Cooperative Manipulation as Functional Redundancy

    E-Print Network [OSTI]

    Gravdahl, Jan Tommy

    Considering Passive Joints in Cooperative Manipulation as Functional Redundancy P°al Johan From. Further, it is shown how this can be used to represent the freedom of passive joints. The main developed can be used to show how the introduction of passive joints at the end of a kinematic chain gives

  16. Selection of stirling engine parameter and modes of joint operation with the Topaz II

    SciTech Connect (OSTI)

    Kirillov, E.Y.; Ogloblin, B.G.; Shalaev, A.I.

    1996-03-01

    In addition to a high-temperature thermionic conversion cycle, application of a low-temperature machine cycle, such as the Stirling engine, is being considered. To select the optimum mode for joint operation of the Topaz II system and Stirling engine, output electric parameters are obtained as a function of thermal power released in the TFE fuel cores. The hydraulic diagram used for joint operation of the Topaz II and the Stirling engine is considered. Requirements to hydraulic characteristics of the Stirling engine heat exchanges are formulated. Scope of necessary modifications to mount the Stirling Engine on the Topaz II is estimated. {copyright} {ital 1996 American Institute of Physics.}

  17. Look at this: the neural correlates of initiating and responding to bids for joint attention

    E-Print Network [OSTI]

    Redcay, Elizabeth

    When engaging in joint attention, one person directs another person's attention to an object (Initiating Joint Attention, IJA), and the second person's attention follows (Responding to Joint Attention, RJA). As such, joint ...

  18. Vacuum Bellows, Vacuum Piping, Cryogenic Break, and Copper Joint Failure Rate Estimates for ITER Design Use

    SciTech Connect (OSTI)

    L. C. Cadwallader

    2010-06-01

    The ITER international project design teams are working to produce an engineering design in preparation for construction of the International Thermonuclear Experimental Reactor (ITER) tokamak. During the course of this work, questions have arisen in regard to safety barriers and equipment reliability as important facets of system design. The vacuum system designers have asked several questions about the reliability of vacuum bellows and vacuum piping. The vessel design team has asked about the reliability of electrical breaks and copper-copper joints used in cryogenic piping. Research into operating experiences of similar equipment has been performed to determine representative failure rates for these components. The following chapters give the research results and the findings for vacuum system bellows, power plant stainless steel piping (amended to represent vacuum system piping), cryogenic system electrical insulating breaks, and copper joints.

  19. Joint probability distributions for projection probabilities of random orthonormal states

    E-Print Network [OSTI]

    L. Alonso; T. Gorin

    2015-10-19

    A finite dimensional quantum system for which the quantum chaos conjecture applies has eigenstates, which show the same statistical properties than the column vectors of random orthogonal or unitary matrices. Here, we consider the different probabilities for obtaining a specific outcome in a projective measurement, provided the system is in one of its eigenstates. We then give analytic expressions for the joint probability density for these probabilities, with respect to the ensemble of random matrices. In the case of the unitary group, our results can be applied, also, to the phenomenon of universal conductance fluctuations, where the same mathematical quantities describe partial conductances in a two-terminal mesoscopic scattering problem with a finite number of modes in each terminal.

  20. 1936 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 38, NO. 4, JULY 2000 Electromagnetic Inversion in Monostatic Ground

    E-Print Network [OSTI]

    Spagnolini, Umberto

    (GPR) is a remote sensing system used to measure short-pulse electromagnetic (EM) reflections due1936 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 38, NO. 4, JULY 2000 Electromagnetic and Umberto Spagnolini, Member, IEEE Abstract--A comprehensive analysis of electromagnetic (EM) inversion

  1. Inverse Optimization: An Application to the Capacitated Plant Location Problem

    E-Print Network [OSTI]

    Bitran, Gabriel R.

    Inverse optimization refers to the fact that each time a Lagrangean derived from a given mathematical programming problem is solved, it produces an optimal solution to some problem with a different right hand side. This ...

  2. Forward and inverse metabolic engineering strategies for improving polyhydroxybyrate production

    E-Print Network [OSTI]

    Tyo, Keith E. J

    2008-01-01

    Forward metabolic engineering (FME) is a rational approach to cellular engineering, relying on an understanding of the entire metabolic network to direct perturbations for phenotype improvement. Conversely, inverse metabolic ...

  3. Uniqueness of the multi-dimensional inverse scattering problem for ...

    E-Print Network [OSTI]

    The inverse scattering problem for stationary (time independent) potentials q(x) has been ..... ~ofE Jg for each ~0EC~(N")} by using a partition of unity. Below we

  4. A multitask learning perspective on acoustic-articulatory inversion 

    E-Print Network [OSTI]

    Richmond, Korin

    2007-01-01

    This paper proposes the idea that by viewing an inversion mapping MLP from a Multitask Learning perspective, we may be able to relax two constraints which are inherent in using electromagnetic articulography as a source ...

  5. Bayesian Uncertainty Quantification for Large Scale Spatial Inverse Problems 

    E-Print Network [OSTI]

    Mondal, Anirban

    2012-10-19

    and Discrete Cosine transform were used for dimension reduction of the random spatial field. Furthermore, we used a hierarchical Bayes model to inject multiscale data in the modeling framework. In this Bayesian framework, we have shown that this inverse problem...

  6. Bayesian compressive sensing for ultrawideband inverse scattering in random media

    E-Print Network [OSTI]

    Fouda, A E

    2014-01-01

    We develop an ultrawideband (UWB) inverse scattering technique for reconstructing continuous random media based on Bayesian compressive sensing. In addition to providing maximum a posteriori estimates of the unknown weights, Bayesian inversion provides estimate of the confidence level of the solution, as well as a systematic approach for optimizing subsequent measurement(s) to maximize information gain. We impose sparsity priors directly on spatial harmonics to exploit the spatial correlation exhibited by continuous media, and solve for their posterior probability density functions efficiently using a fast relevance vector machine. We linearize the problem using the first-order Born approximation which enables us to combine, in a single inversion, measurements from multiple transmitters and ultrawideband frequencies. We extend the method to high-contrast media using the distorted-Born iterative method. We apply time-reversal strategies to adaptively focus the inversion effort onto subdomains of interest, and ...

  7. Tests of the Gravitational Inverse-Square Law

    E-Print Network [OSTI]

    E. G. Adelberger; B. R. Heckel; A. E. Nelson

    2003-07-22

    We review recent experimental tests of the gravitational inverse-square law and the wide variety of theoretical considerations that suggest the law may break down in experimentally accessible regions.

  8. Preliminary Inversion Mapping Results with a New EMA Corpus 

    E-Print Network [OSTI]

    Richmond, Korin

    2009-01-01

    In this paper, we apply our inversion mapping method, the trajectory mixture density network (TMDN), to a new corpus of articulatory data, recorded with a Carstens AG500 electromagnetic articulograph. This new data set, ...

  9. Effects of surface scattering in full-waveform inversion

    E-Print Network [OSTI]

    Rondenay, Stephane

    In full-waveform inversion of seismic body waves, often the free surface is ignored on grounds of computational efficiency. A synthetic study was performed to investigate the effects of this simplification. In terms of ...

  10. On inverse problems in secondary oil recovery Victor Isakov

    E-Print Network [OSTI]

    Isakov, Victor

    recommendations for drilling new wells and finding pumping regimes to optimize oil recovery. Looking equations describing fluids in porous media. This inverse problem is called "history matching". Despite its

  11. SOFTWARE Open Access RNAexinv: An extended inverse RNA folding from

    E-Print Network [OSTI]

    Barash, Danny

    SOFTWARE Open Access RNAexinv: An extended inverse RNA folding from shape and physical attributes problem that aims to predict the secondary structure of a given RNA sequence. Software packages are nowa

  12. Long Primer Extension by a Novel Inverse PCR Method

    E-Print Network [OSTI]

    Bishop, Stephanie Cara

    2009-05-21

    An inverse polymerase chain reaction (PCR) was employed to construct an engineered F1-ATPase by means of inserting the repressor of primer (Rop) DNA sequence into the region of the ATP synthase gamma (?) subunit DNA sequence encoding a regulatory...

  13. COLLOQUIUM: Seismic Imaging and Inversion Based on Spectral-Element...

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

    February 6, 2013, 4:15pm to 5:30pm Colloquia MBG Auditorium COLLOQUIUM: Seismic Imaging and Inversion Based on Spectral-Element and Adjoint Methods Professor Jeroen Tromp Princeton...

  14. STOCHASTIC INVERSE PROBLEM WITH NOISY -APPLICATION TO AERONAUTICAL MODEL -

    E-Print Network [OSTI]

    Klein, Thierry

    STOCHASTIC INVERSE PROBLEM WITH NOISY SIMULATOR - APPLICATION TO AERONAUTICAL MODEL - by Nabil-based method to estimate aeronautic parameters in a Fuel mass model. We use an analytical model that can

  15. Solving Inverse Detection Problems Using Passive Radiation Signatures

    SciTech Connect (OSTI)

    Favorite, Jeffrey A.; Armstrong, Jerawan C.; Vaquer, Pablo A.

    2012-08-15

    The ability to reconstruct an unknown radioactive object based on its passive gamma-ray and neutron signatures is very important in homeland security applications. Often in the analysis of unknown radioactive objects, for simplicity or speed or because there is no other information, they are modeled as spherically symmetric regardless of their actual geometry. In these presentation we discuss the accuracy and implications of this approximation for decay gamma rays and for neutron-induced gamma rays. We discuss an extension of spherical raytracing (for uncollided fluxes) that allows it to be used when the exterior shielding is flat or cylindrical. We revisit some early results in boundary perturbation theory, showing that the Roussopolos estimate is the correct one to use when the quantity of interest is the flux or leakage on the boundary. We apply boundary perturbation theory to problems in which spherically symmetric systems are perturbed in asymmetric nonspherical ways. We apply mesh adaptive direct search (MADS) algorithms to object reconstructions. We present a benchmark test set that may be used to quantitatively evaluate inverse detection methods.

  16. The US Department of Energy Joint Genome Institute Microbial Genome Program

    E-Print Network [OSTI]

    Lapidus, Alla

    2005-01-01

    Department of Energy Joint Genome Institute Microbial GenomeDepartment of Energy Joint Genome Institute Microbial Genome

  17. Japan-Taiwan Joint SymposiumJapan-Taiwan Joint Symposium onon Innovative Synthesis forInnovative Synthesis for

    E-Print Network [OSTI]

    Takada, Shoji

    Japan-Taiwan Joint SymposiumJapan-Taiwan Joint Symposium onon Innovative Synthesis for, TaiwanThe National Science Council, Taiwan ·· Taipei Economic & Cultural Representative Office in Japan://www.kuicrkuicr..kyoto-ukyoto-u.ac..ac.jp/jp/ #12;Japan-Taiwan Joint Symposium on Innovative Synthesis for New Materials Chemistry Date October 3

  18. Foster Wheeler, BOC joint venture inaugurates Petrox hydrogen plant

    SciTech Connect (OSTI)

    NONE

    1996-12-31

    Joint venture breaks ground for second plant at Lagoven`s Amuay refinery in Venezuela. The Foster Wheeler Power Systems (FWPS) Inc. and BOC Gases joint venture to build, own and operate {open_quotes}over-the-fence{close_quotes} hydrogen plants reached two important milestones last spring. The first was inauguration on May 27 of its first-ever project, an 8-million-cubic-foot-per-day plant located at Chile`s Petrox refinery, in Talcahuano. The second was ground breaking less than three weeks later for the planned 50-million-cubic-foot-per-day plant at Lagoven, S.A.`s sprawling 630,000-barrel-a-day refinery in Amuay, Venezuela. Ceremonies marking the start-up of the Talcahuano plant were presided over by Benjamin Teplizky, Chile`s Minister of Mining. The plant is significant because it is the first privately owned plant of its kind ever to be built in Chile. The 99.9% pure hydrogen produced by the plant serves the requirements of the refinery`s recently constructed hydrocracking unit which helps the refinery meet lower sulfur levels in diesel and fuel oils and reduce aromatics content in gasoline.

  19. Adhesive joint and composites modeling in SIERRA.

    SciTech Connect (OSTI)

    Ohashi, Yuki; Brown, Arthur A.; Hammerand, Daniel Carl; Adolf, Douglas Brian; Chambers, Robert S.; Foulk, James W., III

    2005-11-01

    Polymers and fiber-reinforced polymer matrix composites play an important role in many Defense Program applications. Recently an advanced nonlinear viscoelastic model for polymers has been developed and incorporated into ADAGIO, Sandia's SIERRA-based quasi-static analysis code. Standard linear elastic shell and continuum models for fiber-reinforced polymer-matrix composites have also been added to ADAGIO. This report details the use of these models for advanced adhesive joint and composites simulations carried out as part of an Advanced Simulation and Computing Advanced Deployment (ASC AD) project. More specifically, the thermo-mechanical response of an adhesive joint when loaded during repeated thermal cycling is simulated, the response of some composite rings under internal pressurization is calculated, and the performance of a composite container subjected to internal pressurization, thermal loading, and distributed mechanical loading is determined. Finally, general comparisons between the continuum and shell element approaches for modeling composites using ADAGIO are given.

  20. Pipeline safety joint eliminates need for divers

    SciTech Connect (OSTI)

    Not Available

    1983-04-01

    The Sea-Hook coupling is a diverless pressure-compensated pipeline safety joint designed to protect the pipe from damage by excessive physical loads. The coupling provides a predetermined weak point in the line that will cause a controlled separation when the line is exposed to strong wave action or dragging anchors. Moreover, it offers prepressurized remote lockout protection, metal seal integrity, no hand-up separation, enclosed bolting, optimal manual lockout, and no springs or shear rings.

  1. Italy Joint Statement | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICE INDUSTRIALU.S. Department of(Presentation)Irving5: How Much9:Italy Joint

  2. INVERSE PROBLEMS FOR EINSTEIN MANIFOLDS 1. Introduction ...

    E-Print Network [OSTI]

    2008-12-11

    principle is that Einstein's equation becomes a non-linear elliptic system with real ...... manifolds with boundary, Communications in Analysis and Geometry 11 ...

  3. Solutions of the Schrödinger equation with inversely quadratic Hellmann plus inversely quadratic potential using Nikiforov-Uvarov method

    SciTech Connect (OSTI)

    Ita, B. I.

    2014-11-12

    By using the Nikiforov-Uvarov (NU) method, the Schrödinger equation has been solved for the interaction of inversely quadratic Hellmann (IQHP) and inversely quadratic potential (IQP) for any angular momentum quantum number, l. The energy eigenvalues and their corresponding eigenfunctions have been obtained in terms of Laguerre polynomials. Special cases of the sum of these potentials have been considered and their energy eigenvalues also obtained.

  4. TIME-LAPSE SEISMIC MODELING & INVERSION OF CO2 SATURATION FOR SEQUESTRATION AND ENHANCED OIL RECOVERY

    SciTech Connect (OSTI)

    Mark A. Meadows

    2006-03-31

    Injection of carbon dioxide (CO2) into subsurface aquifers for geologic storage/sequestration, and into subsurface hydrocarbon reservoirs for enhanced oil recovery, has become an important topic to the nation because of growing concerns related to global warming and energy security. In this project we developed new ways to predict and quantify the effects of CO2 on seismic data recorded over porous reservoir/aquifer rock systems. This effort involved the research and development of new technology to: (1) Quantitatively model the rock physics effects of CO2 injection in porous saline and oil/brine reservoirs (both miscible and immiscible). (2) Quantitatively model the seismic response to CO2 injection (both miscible and immiscible) from well logs (1D). (3) Perform quantitative inversions of time-lapse 4D seismic data to estimate injected CO2 distributions within subsurface reservoirs and aquifers. This work has resulted in an improved ability to remotely monitor the injected CO2 for safe storage and enhanced hydrocarbon recovery, predict the effects of CO2 on time-lapse seismic data, and estimate injected CO2 saturation distributions in subsurface aquifers/reservoirs. We applied our inversion methodology to a 3D time-lapse seismic dataset from the Sleipner CO2 sequestration project, Norwegian North Sea. We measured changes in the seismic amplitude and traveltime at the top of the Sleipner sandstone reservoir and used these time-lapse seismic attributes in the inversion. Maps of CO2 thickness and its standard deviation were generated for the topmost layer. From this information, we estimated that 7.4% of the total CO2 injected over a five-year period had reached the top of the reservoir. This inversion approach could also be applied to the remaining levels within the anomalous zone to obtain an estimate of the total CO2 injected.

  5. Image Appraisal for 2D and 3D Electromagnetic Inversion

    SciTech Connect (OSTI)

    Alumbaugh, D.L.; Newman, G.A.

    1999-01-28

    Linearized methods are presented for appraising image resolution and parameter accuracy in images generated with two and three dimensional non-linear electromagnetic inversion schemes. When direct matrix inversion is employed, the model resolution and posterior model covariance matrices can be directly calculated. A method to examine how the horizontal and vertical resolution varies spatially within the electromagnetic property image is developed by examining the columns of the model resolution matrix. Plotting the square root of the diagonal of the model covariance matrix yields an estimate of how errors in the inversion process such as data noise and incorrect a priori assumptions about the imaged model map into parameter error. This type of image is shown to be useful in analyzing spatial variations in the image sensitivity to the data. A method is analyzed for statistically estimating the model covariance matrix when the conjugate gradient method is employed rather than a direct inversion technique (for example in 3D inversion). A method for calculating individual columns of the model resolution matrix using the conjugate gradient method is also developed. Examples of the image analysis techniques are provided on 2D and 3D synthetic cross well EM data sets, as well as a field data set collected at the Lost Hills Oil Field in Central California.

  6. Joint Center for Energy Storage Research

    SciTech Connect (OSTI)

    Eric Isaacs

    2012-11-30

    The Joint Center for Energy Storage Research (JCESR) is a major public-private research partnership that integrates U.S. Department of Energy national laboratories, major research universities and leading industrial companies to overcome critical scientific challenges and technical barriers, leading to the creation of breakthrough energy storage technologies. JCESR, centered at Argonne National Laboratory, outside of Chicago, consolidates decades of basic research experience that forms the foundation of innovative advanced battery technologies. The partnership has access to some of the world's leading battery researchers as well as scientific research facilities that are needed to develop energy storage materials that will revolutionize the way the United States and the world use energy.

  7. Joint Implementation Network Feed | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View NewGuam:onItron (California)Joint Implementation Network Feed Jump

  8. Malibu Joint Venture | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios TowardsInformation Reducing the GHG Impacts ofMalibu Joint

  9. Joint Final Environmental Impact Statement Montanore Project

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPA Public CommentInverted Attic9: Johnof Energy JoiningJoint1

  10. Joint Final Environmental Impact Statement Montanore Project

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPA Public CommentInverted Attic9: Johnof Energy JoiningJoint12

  11. Parameterization of geophysical inversion model using particle clustering

    E-Print Network [OSTI]

    Yang, Dikun

    2015-01-01

    This paper presents a new method of constructing physical models in a geophysical inverse problem, when there are only a few possible physical property values in the model and they are reasonably known but the geometry of the target is sought. The model consists of a fixed background and many small "particles" as building blocks that float around in the background to resemble the target by clustering. This approach contrasts the conventional geometric inversions requiring the target to be regularly shaped bodies, since here the geometry of the target can be arbitrary and does not need to be known beforehand. Because of the lack of resolution in the data, the particles may not necessarily cluster when recovering compact targets. A model norm, called distribution norm, is introduced to quantify the spread of particles and incorporated into the objective function to encourage further clustering of the particles. As proof of concept, 1D magnetotelluric inversion is used as example. My experiments reveal that the ...

  12. Lepton Number Violation within the Conformal Inverse Seesaw

    E-Print Network [OSTI]

    Humbert, Pascal; Patra, Sudhanwa; Smirnov, Juri

    2015-01-01

    We present a novel framework within the conformal inverse seesaw scheme allowing large lepton number violation while the neutrino mass formula is still governed by the low-scale inverse seesaw mechanism. This model includes new contributions to rare low-energy lepton number violating processes like neutrinoless double beta decay. We find that the lifetime for this rare process due to heavy sterile neutrinos can saturate current experimental limits. The characteristic collider signature of the present conformal inverse seesaw scheme includes, same-sign dilepton plus two jets and same-sign dilepton plus four jets. Finally, we comment on the testability of the model at the Large Hadron Collider since there are new scalars, new fermions and an extra neutral gauge boson with masses around few 100 GeV to few TeV.

  13. Material model calibration through indentation test and stochastic inverse analysis

    E-Print Network [OSTI]

    Buljak, Vladimir

    2015-01-01

    Indentation test is used with growing popularity for the characterization of various materials on different scales. Developed methods are combining the test with computer simulation and inverse analyses to assess material parameters entering into constitutive models. The outputs of such procedures are expressed as evaluation of sought parameters in deterministic sense, while for engineering practice it is desirable to assess also the uncertainty which affects the final estimates resulting from various sources of errors within the identification procedure. In this paper an experimental-numerical method is presented centered on inverse analysis build upon data collected from the indentation test in the form of force-penetration relationship (so-called indentation curve). Recursive simulations are made computationally economical by an a priori model reduction procedure. Resulting inverse problem is solved in a stochastic context using Monte Carlo simulations and non-sequential Extended Kalman filter. Obtained re...

  14. INVERSION IN INDIRECT OPTIMAL CONTROL Francois Chaplais

    E-Print Network [OSTI]

    dynamics and an optimal cost, it was shown how to take advantage of the geometric structure of the dy address (SISO system with generic terminal and integral cost). In section 2 we explain how to recover into account for two special cases: terminal cost with or without terminal constraints. In section 3 we treat

  15. Development of the bus joint for the ITER Central Solenoid

    SciTech Connect (OSTI)

    Martovetsky, Nicolai N; Irick, David Kim; Kenney, Steven J

    2013-01-01

    The terminations of the Central Solenoid (CS) modules are connected to the bus extensions by joints located outside the CS in the gap between the CS and Torodial Field (TF) assemblies. These joints have very strict space limitations. Low resistance is a common requirement for all ITER joints. In addition, the CS bus joints will experience and must be designed to withstand significant variation in the magnetic field of several tenths of a Tesla per second during initiation of plasma. The joint resistance is specified to be less than 4 nOhm. The joints also have to be soldered in the field and designed with the possibility to be installed and dismantled in order to allow cold testing in the cold test facility. We have developed coaxial joints that meet these requirements and have demonstrated the feasibility to fabricate and assemble them in the vertical configuration. We introduced a coupling cylinder with superconducting strands soldered to the surface of the cable that can be installed in the ITER assembly hall and at the Cold Test Facility. This cylinder serves as a transition area between the CS module and the bus extension. We made two racetrack samples and tested four bus joints in our Joint Test Apparatus. Resistance of the bus joints was measured by a decay method and by a microvoltmeter; the value of the current was measured by the Hall probes. This measurement method was verified in the previous tests. The resistance of the joints varied insignificantly from 1.5 to 2 nOhm. One of the challenges associated with a soldered joint is the inability to use corrosive chemicals that are difficult to clean. This paper describes our development work on cable preparation, chrome removal, compaction, soldering, and final assembly and presents the test results.

  16. Meeting Energy Reduction Requirements at Joint Base San Antonio 

    E-Print Network [OSTI]

    Dschuden, B.; Thomas, F.

    2013-01-01

    Success! The Premier Joint Base in the Department of Defense! Joint Base San Antonio and Energy Program 18 December 2013 Bruce Dschuden, Frank Thomas JBSA Resource Efficiency Managers ESL-KT-13-12-25 CATEE 2013: Clean Air Through Energy Efficiency... Success! The Premier Joint Base in the Department of Defense! Resource Efficiency Manager • Resource Efficiency Manager (REM) – Subject Matter Experts brought on as consultants to assist DoD in identifying and creating energy efficiency improvement...

  17. A Model to Assess Fatigue at Joint-Level Using the Half-Joint Concept

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    and simulations generated by our animation environment. 1. Introduction The human body is continuously under b Virtual Reality Laboratory. Swiss Federal Institute of Technology Lausanne, Switzerland In this paper we focus on the modeling and evaluation of performance factors as human fatigue at joint level. We

  18. Sandia Energy - "Bionic" Liquids from Lignin: Joint BioEnergy...

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

    from Lignin: Joint BioEnergy Institute Results Pave the Way for Closed-Loop Biofuel Refineries Home Renewable Energy Energy Transportation Energy Biofuels Facilities Partnership...

  19. United States and France Sign Joint Statement on Civil Liability...

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

    Statement by U.S. Secretary of Energy, Ernest Moniz, and French Minister of Ecology, Sustainable Development, and Energy, Philippe Martin. "The signing of this joint statement...

  20. Rooted in Wonder: Joint Genome Institute Study Reveals Amazing...

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

    underfoot essentials so easily overlooked. Recently, a team of researchers led by the Energy Department Office of Science's Joint Genome Institute (JGI) and the University of...

  1. Seismic Capacity of Threaded, Brazed, and Grooved Pipe Joints

    Office of Environmental Management (EM)

    the behavior and failure mode of common joints under extreme lateral loads * Static and shake table tests conducted of pressurized - Threaded, - Brazed, - Mechanical...

  2. Transcript of March 4, 2011 Joint Public Meeting

    Office of Environmental Management (EM)

    of Proceedings NUCLEAR REGULATORY COMMISSION Title: Disposal of Low-Level Nuclear Waste Joint NRCDOE Workshop Docket Number: (na) Location: Phoenix, Arizona Date: Friday,...

  3. Joint Venture Established Between Russian Weapons Plant And the...

    National Nuclear Security Administration (NNSA)

    Weapons Plant And the Largest Dialysis Provider in the U.S. Press Release Sep 20, 2001 Joint Venture Established Between Russian Weapons Plant And the Largest Dialysis...

  4. Joint Genome Institute Progress Report 2002-2005

    SciTech Connect (OSTI)

    Gilbert, David

    2005-10-03

    Progress report covering activities at the DOE-Joint Genome Institute in Walnut Creek, California for the period 2002-2005.

  5. Equivalent Continuum Modeling for Shock Wave Propagation in Jointed...

    Office of Scientific and Technical Information (OSTI)

    Equivalent Continuum Modeling for Shock Wave Propagation in Jointed Media Citation Details In-Document Search Title: Equivalent Continuum Modeling for Shock Wave Propagation in...

  6. Inverse spin Hall effect in Pt/(Ga,Mn)As

    SciTech Connect (OSTI)

    Nakayama, H.; Chen, L.; Chang, H. W.; Ohno, H.; Matsukura, F.

    2015-06-01

    We investigate dc voltages under ferromagnetic resonance in a Pt/(Ga,Mn)As bilayer structure. A part of the observed dc voltage is shown to originate from the inverse spin Hall effect. The sign of the inverse spin Hall voltage is the same as that in Py/Pt bilayer structure, even though the stacking order of ferromagnetic and nonmagnetic layers is opposite to each other. The spin mixing conductance at the Pt/(Ga,Mn)As interface is determined to be of the order of 10{sup 19?}m{sup ?2}, which is about ten times greater than that of (Ga,Mn)As/p-GaAs.

  7. The Generalized Mader's Inversion Formulas for the Radon Transforms

    E-Print Network [OSTI]

    Yuri A. Antipov; Boris Rubin

    2011-03-11

    In 1927 Philomena Mader derived elegant inversion formulas for the hyperplane Radon transform on $\\bbr^n$. These formulas differ from the original ones by Radon and seem to be forgotten. We generalize Mader's formulas to totally geodesic Radon transforms in any dimension on arbitrary constant curvature space. Another new interesting inversion formula for the $k$-plane transform was presented in the recent book "Integral geometry and Radon transform" by S. Helgason. We extend this formula to arbitrary constant curvature space. The paper combines tools of integral geometry and complex analysis.

  8. Stability of solutions to inverse scattering problems with fixed-energy data

    E-Print Network [OSTI]

    Alexander G. Ramm

    2000-08-03

    A review of the author's results is given. Inversion formulas and stability estimates for the solutions to 3D inverse scattering problems with fixed-energy data are obtained. Inversions of exact and noisy data are stidied. The inverse potential scattering problem is discussed in detail, inversion formulas are derived and error estimates are obtained. Inverse obstacle scattering problem with data at a fixed frequency is studied. Uniqueness theorems and stability estimates are obtained. Inverse geophysical scattering problem is discussed. An algorithm for computing the Dirichlet-to-Neumann map from the scattering amplitude and vicxe versa is obtained. An analytical example of non-uniqueness of the solution to a 3D inverse geophysical problem is constructed. An inverse problem for a parabolic equation is discussed.

  9. Current Activities Assessing Butt Fusion Joint Integrity in High Density Polyethylene Piping

    SciTech Connect (OSTI)

    Crawford, Susan L.; Cinson, Anthony D.; Doctor, Steven R.; Denslow, Kayte M.

    2012-09-01

    The Pacific Northwest National Laboratory (PNNL) in Richland, Washington, conducted initial studies to evaluate the effectiveness of nondestructive examinations (NDE) coupled with mechanical testing for assessing butt fusion joint integrity in high density polyethylene (HDPE) pipe. The work provided insightful information to the United States Nuclear Regulatory Commission (NRC) on the effectiveness of volumetric inspection techniques for detecting lack of fusion (LOF) conditions in the fusion joints. HDPE has been installed on a limited basis in American Society of Mechanical Engineers (ASME) Class 3, buried piping systems at several operating U.S. nuclear power plants and has been proposed for use in new construction. A comparison was made between the results from ultrasonic and microwave nondestructive examinations and the results from mechanical destructive evaluations, specifically the high-speed tensile test and the side-bend test, for determining joint integrity. The data comparison revealed that none of the NDE techniques detected all of the lack-of-fusion conditions that were revealed by the destructive tests. Follow-on work has recently been initiated at PNNL to accurately characterize the NDE responses from machined flaws of varying size and location in PE 4710 materials as well as the LOF condition. This effort is directed at quantifying the ability of volumetric NDE techniques to detect flaws in relation to the critical flaw size associated with joint integrity. A status of these latest investigations is presented.

  10. Re-Inversion of Surface Electrical Resistivity Tomography Data from the Hanford Site B-Complex

    SciTech Connect (OSTI)

    Johnson, Timothy C.; Wellman, Dawn M.

    2013-05-01

    This report documents the three-dimensional (3D) inversion results of surface electrical resistivity tomography (ERT) data collected over the Hanford Site B-Complex. The data were collected in order to image the subsurface distribution of electrically conductive vadose zone contamination resulting from both planned releases of contamination into subsurface infiltration galleries (cribs, trenches, and tile fields), as well as unplanned releases from the B, BX, and BY tank farms and/or associated facilities. Electrically conductive contaminants are those which increase the ionic strength of pore fluids compared to native conditions, which comprise most types of solutes released into the subsurface B-Complex. The ERT data were collected and originally inverted as described in detail in report RPP-34690 Rev 0., 2007, which readers should refer to for a detailed description of data collection and waste disposal history. Although the ERT imaging results presented in that report successfully delineated the footprint of vadose zone contamination in areas outside of the tank farms, imaging resolution was not optimized due to the inability of available inversion codes to optimally process the massive ERT data set collected at the site. Recognizing these limitations and the potential for enhanced ERT characterization and time-lapse imaging at contaminated sites, a joint effort was initiated in 2007 by the U.S. Department of Energy – Office of Science (DOE-SC), with later support by the Office of Environmental Management (DOE-EM), and the U.S. Department of Defense (DOD), to develop a high-performance distributed memory parallel 3D ERT inversion code capable of optimally processing large ERT data sets. The culmination of this effort was the development of E4D (Johnson et al., 2010,2012) In 2012, under the Deep Vadose Zone Applied Field Research Initiative (DVZ-AFRI), the U.S. Department of Energy – Richland Operations Office (DOE-RL) and CH2M Hill Plateau Remediation Company (CHPRC) commissioned an effort for the Pacific Northwest National Laboratory (PNNL) to re-invert the ERT data collected over the B-Complex using E4D, with the objective to improve imaging resolution and better understand the distribution of vadose zone contamination at the B-Complex. The details and results of that effort as documented in this report display a significant improvement in ERT image resolution, revealing the nature and orientation of contaminant plumes originating in former infiltration galleries and extending toward the water table. In particular, large plumes originating in the BY-Cribs area appear to have intercepted, or are close to intercepting the water table after being diverted eastward, possibly by the same low permeability unit causing perched water north of the B-Tank Farm boundary. Contaminant plumes are also evident beneath the BX-Trenches, but do not appear to have intercepted the water table. Imaging results within the tank farms themselves are highly biased by the dense network of electrically conductive tanks and dry wells, and are therefore inconclusive concerning contaminant distributions beneath tanks. However, beneath the diversion boxes, the results do reveal highly conductive anomalies that are not associated with metallic infrastructure, and may be diagnostic of extensive contamination. Overall, the parallel ERT inversion provides additional detail concerning contaminated zones in terms of conductive anomalies. These anomalies are consistent with waste disposal histories, and in several cases reveal lateral contaminant transport caused by heterogeneity within the vadose zone.

  11. Using Expert Knowledge in Solving the Seismic Inverse Problem

    E-Print Network [OSTI]

    Ward, Karen

    resources such as the oil in the Middle East. However, nowadays, most easy-to-access mineral resources have Inverse Problem: Brief Introduction In evaluations of natural resources and in the search for natural resources, it is very important to determine Earth structure. Our civilization greatly depends on the things

  12. Using Expert Knowledge in Solving the Seismic Inverse Problem ?

    E-Print Network [OSTI]

    Ward, Karen

    resources such as the oil in the Middle East. However, nowadays, most easy­to­access mineral resources have knowledge 1 Seismic Inverse Problem: Brief Introduction In evaluations of natural resources and in the search for natural resources, it is very important to determine Earth structure. Our civilization greatly

  13. Posterior Predictive Modeling Using Multi-Scale Stochastic Inverse Parameter

    E-Print Network [OSTI]

    Ray, Jaideep

    , Coarse Scale: 30x20 cells, Continuous variables Fine Scale: Binary Media 3000x2000 cells Measured travel = proportion of high conductivity #12;Inversion 4 ~ N(0,) ij = C(xi,xj ) = aexp(- | xi - xj |2 /b2 ) F(x) = 1 proportion field Definition of Gaussian cdf provides transform between and F Ke = L(F(x),,K1,K2) Link

  14. Numerical Methods for the Inverse Nonlinear Fourier Transform

    E-Print Network [OSTI]

    Civelli, Stella; Secondini, Marco

    2015-01-01

    We introduce a new numerical method for the computation of the inverse nonlinear Fourier transform and compare its computational complexity and accuracy to those of other methods available in the literature. For a given accuracy, the proposed method requires the lowest number of operations

  15. Quadratic Inverse Eigenvalue Problems, Active Vibration Control and Model Updating

    E-Print Network [OSTI]

    Datta, Biswa

    is an important practical problem that arises in a wide range of applications, including mechanical vibrations control (AVC) and finite element model updating (FEMU) in mechanical vibration. The active vibrationQuadratic Inverse Eigenvalue Problems, Active Vibration Control and Model Updating Biswa N. Datta,1

  16. The Inverse Kinetics Method and PID Compensation of the

    E-Print Network [OSTI]

    spent working with me to understand the nuclear reactor theory. Additional thanks to Dr. Parma for all.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Nuclear Reaction TheoryThe Inverse Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin

  17. An inverse random source problem for the Helmholtz equation

    E-Print Network [OSTI]

    Gang Bao; Shui-Nee Chow; Peijun Li; Haomin Zhou

    2013-10-25

    Jun 10, 2013 ... use electric or magnetic measurements on the surface of the human body, such as the head, to infer the source currents inside of the body, such as the brain, that .... for the solution of the boundary value problem, which allows us to ... analysis for the direct and inverse source scattering problems in the rest ...

  18. An inverse random source scattering problem in inhomogeneous ...

    E-Print Network [OSTI]

    P Li

    2011-02-03

    Feb 4, 2011 ... on the surface of the human body, such as the head, to infer the ... and the full vector electromagnetic inverse source problems in the free space as well as in .... the so-called outgoing radiation boundary conditions, which are ...

  19. DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR

    E-Print Network [OSTI]

    Sambridge, Malcolm

    DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR ANALYSIS USING for the different solutions didn't even overlap. Introduction A discrimination and classification strategy ambiguity and possible remanent magnetization the recovered dipole moment is compared to a library

  20. Seismic amplitude inversion for interface geometry: practical approach for application

    E-Print Network [OSTI]

    Pratt, R. Gerhard

    -stack depth-migrated CRP gathers. The input data for tomography are time deviations derived from the apparentŁection seismic gathers is performed with the aid of pre-stack time migration, which enhances continuity and re zone by migration brings the amplitudes closer to the ray amplitudes assumed in the inversion. De-migration

  1. Vienna MAY 2001 (part 1) 1 Lectures on Inverse Problems

    E-Print Network [OSTI]

    Arnold, Anton

    #12; Vienna MAY 2001 (part 1) 16 Slide 15 ' & $ % Parabolic Problems A Simple Example: A heat transfer ' & $ % Plan for the Three Lectures 1. For the rest of today: Some of the above topics. 2. X-ray Tomography) 4 Slide 4 ' & $ % First Concepts Model Data Direct Problem Inverse Problem #12; Vienna MAY 2001

  2. A family of inversion formulas in Thermoacoustic Tomography

    E-Print Network [OSTI]

    Nguyen, Linh V

    2009-01-01

    We present a family of closed form inversion formulas in thermoacoustic tomography in the case of a constant sound speed. The formulas are presented in both time-domain and frequency-domain versions. As special cases, they imply most of the previously known filtered backprojection type formulas.

  3. Equilibrium cluster fluids: Pair interactions via inverse design

    E-Print Network [OSTI]

    Ryan B. Jadrich; Jonathan A. Bollinger; Beth A. Lindquist; Thomas M. Truskett

    2015-09-14

    Inverse methods of statistical mechanics are becoming productive tools in the design of materials with specific microstructures or properties. While initial studies have focused on solid-state design targets (e.g, assembly of colloidal superlattices), one can alternatively design fluid states with desired morphologies. This work addresses the latter and demonstrates how a simple iterative Boltzmann inversion strategy can be used to determine the isotropic pair potential that reproduces the radial distribution function of a fluid of amorphous clusters with prescribed size. The inverse designed pair potential of this "ideal" cluster fluid, with its broad attractive well and narrow repulsive barrier at larger separations, is qualitatively different from the so-called SALR form most commonly associated with equilibrium cluster formation in colloids, which features short-range attractive (SA) and long-range repulsive (LR) contributions. These differences reflect alternative mechanisms for promoting cluster formation with an isotropic pair potential, and they in turn produce structured fluids with qualitatively different static and dynamic properties. Specifically, equilibrium simulations show that the amorphous clusters resulting from the inverse designed potentials display more uniformity in size and shape, and they also show greater spatial and temporal resolution than those resulting from SALR interactions.

  4. Inversion of Hydrological Tracer Test Data Using TomogrpahicConstraints

    SciTech Connect (OSTI)

    Linde, Niklas; Finsterle, Stefan; Hubbard, Susan

    2004-11-11

    A reasonable description of the hydraulic conductivity structure is a prerequisite for modeling contaminant transport. However, formulations of hydrogeological inverse problems utilizing hydrogeological data only often fail to reliably resolve features at a resolution required for accurately predicting transport. Incorporation of geophysical data into the inverse problem offers the potential to increase this resolution. In this study, we invert hydrological tracer test data using the shape and relative magnitude variations derived from geophysical tomographic data to regionalize a hydrogeological inverse problem in order to estimate the hydraulic conductivity structure. Our approach does not require that the petrophysical relationship be known a-priori, but that it is linear and stationary within each geophysical anomaly. However, tomograms are imperfect models of geophysical properties and geophysical properties are not necessarily strongly linked to hydraulic conductivity. Therefore, we focus on synthetic examples where the correlation between radar velocity and hydraulic conductivity, as well as the geophysical data acquisition errors, are varied in order to assess what aspects of the hydraulic conductivity structure we can expect to resolve under different conditions. The results indicate that regularization of the tracer inversion procedure using geophysical data improves estimates of hydraulic conductivity. We find that even under conditions of corrupted geophysical data, we can accurately estimate the effective hydraulic conductivity and areas of high and low hydraulic conductivity. However, given imperfect geophysical data, our results suggest that we cannot expect accurate estimates of the variability of the hydraulic conductivity structure.

  5. Inverse Marx modulators for self-biasing klystron depressed collectors

    SciTech Connect (OSTI)

    Kemp, Mark A.

    2014-07-31

    A novel pulsed depressed collector biasing scheme is proposed. This topology feeds forward energy recovered during one RF pulse for use on the following RF pulse. The presented ''inverse'' Marx charges biasing capacitors in series, and discharges them in parallel. Simulations are shown along with experimental demonstration on a 62kW klystron.

  6. INVERSE MEDIUM SCATTERING PROBLEMS IN NEAR-FIELD ...

    E-Print Network [OSTI]

    2007-05-08

    verse medium scattering problem that arises in near-field optics, which .... Throughout, by assuming nonmagnetic materials and transverse electric polarization, ..... and J. Schotland, Determination of three-dimensional structure in photon scanning ... method for 3D electromagnetic imaging using adjoint fields, Inverse Probl., ...

  7. DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR ANALYSIS USING for the different solutions didn't even overlap. Introduction A discrimination and classification strategy-UXOs dug per UXO). The discrimination and classification methodology depends on the magnitude of the recov

  8. State Complexity of Inversion Operations Da-Jung Cho1

    E-Print Network [OSTI]

    Han, Yo-Sub

    ] investigated the state complexity for basic operations. Later, Yu and his co-authors [7, 8, 20, 21] initi- ated] investigated a generative mechanism based on some operations inspired by mutations in genomes such as deletionState Complexity of Inversion Operations Da-Jung Cho1 , Yo-Sub Han1 , Sang-Ki Ko1 , and Kai Salomaa

  9. Constructive Inversion of Energy Trajectories in Quantum Mechanics

    E-Print Network [OSTI]

    Hall, Richard L.

    page 1 Constructive Inversion of Energy Trajectories in Quantum Mechanics Richard L. Hall Department of Mathematics and Statistics, Concordia University, 1455 de Maisonneuve Boulevard West, Montr´eal algorithm is devised which allows the potential shape f(x) to be reconstructed from the energy trajectory F

  10. An interactive Bayesian geostatistical inverse protocol for hydraulic tomography

    E-Print Network [OSTI]

    Barrash, Warren

    An interactive Bayesian geostatistical inverse protocol for hydraulic tomography Michael N. Fienen April 2008; published 25 July 2008. [1] Hydraulic tomography is a powerful technique for characterizing, necessitate subdivision into zones across which there is no correlation among hydraulic parameters. We propose

  11. Random variate generation for the generalized inverse gaussian distribution

    E-Print Network [OSTI]

    Devroye, Luc

    ;Introduction The two-parameter form of the generalized inverse gaussian distribution (or gig) has density does not quite work for gig variate generation, but it is almost possible to do so. Indeed gaussian law--see, e.g., Lesosky and Horrocks (2003). -- 2 -- #12;A transformed gig distribution

  12. An inverse dynamical problem for connected beams A. Morassi

    E-Print Network [OSTI]

    Ikegami, Takashi

    place between longitudinal and bending motions. In this paper, we neglect bending motions and we only Abstract This paper deals with a dynamical inverse problem for a composite beam formed by two connected In this paper we address the following problem of nondestructive testing: To determine, in a steel

  13. Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique

    E-Print Network [OSTI]

    Najm, Farid N.

    Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique Nahi H. Abdul Ghani Department of ECE University of Toronto Toronto, Ontario, Canada f.najm@utoronto.ca ABSTRACT Power grid Aids General Terms Performance, Algorithms, Verification Keywords Power grid, voltage drop, approximate

  14. Outer inverses: Jacobi type identities and nullities of submatrices

    E-Print Network [OSTI]

    Bapat, Ravindra B.

    Outer inverses: Jacobi type identities and nullities of submatrices@isid.ac.in Abstract According to the Jacobi identity, if A is an invertible matrix then any min* *or of A-1 for special generalized * *in- verses. A permanental analog of the Jacobi identity is proved. Bounds

  15. Automatic Sacts and inverse semigroup presentations Erzsebet Rita Dombi

    E-Print Network [OSTI]

    St Andrews, University of

    Automatic S­acts and inverse semigroup presentations Erzsâ??ebet Rita Dombi Ph.D. Thesis University.3 Automatic groups and semigroups . . . . . . . . . . . . . . . . . . . . . . . 14 3 Automatic semigroup acts.2 SchË?utzenberger automatic regular semigroups . . . . . . . . . . . . . . . . . 25 3.3 Examples

  16. COMPLEX WAVELET REGULARIZATION FOR SOLVING INVERSE PROBLEMS IN REMOTE SENSING

    E-Print Network [OSTI]

    Weiss, Pierre

    COMPLEX WAVELET REGULARIZATION FOR SOLVING INVERSE PROBLEMS IN REMOTE SENSING Mika¨el Carlavan Sophia-Antipolis - France ABSTRACT Many problems in remote sensing can be modeled as the min- imization processing: sparsity and regular- ity priors. 1. INTRODUCTION Some problems in remote sensing consist

  17. A PLANAR PARALLEL MANIPULATOR WITH HOLONOMIC HIGHER PAIRS: INVERSE KINEMATICS

    E-Print Network [OSTI]

    Hayes, John

    kinematic analysis. Very little literature on such planar mechanisms was found. The e ects of initialA PLANAR PARALLEL MANIPULATOR WITH HOLONOMIC HIGHER PAIRS: INVERSE KINEMATICS Matthew John D. HAYES of Mechanical Engineering 817 r. Sherbrooke O., Rm 454, Montreal, Quebec, H3A 2K6 Canada, Tel: (514) 398

  18. Numerical solution of an inverse medium scattering problem for ...

    E-Print Network [OSTI]

    "Gang Bao; Peijun Li"

    2009-04-24

    Apr 1, 2009 ... for Maxwell's Equations at fixed frequency ... family of plane waves by solving one direct problem and one adjoint problem of the Max- ...... We use a simple and effective mesh generator in MATLAB by .... [15] D. Colton, J. Coyle, P. Monk, Recent development in inverse acoustic scattering theory, SIAM Rev.

  19. Use of Harmonic Inversion Techniques in Semiclassical Quantization and Analysis of Quantum Spectra

    E-Print Network [OSTI]

    J. Main

    1999-02-11

    Harmonic inversion is introduced as a powerful tool for both the analysis of quantum spectra and semiclassical periodic orbit quantization. The method allows to circumvent the uncertainty principle of the conventional Fourier transform and to extract dynamical information from quantum spectra which has been unattainable before, such as bifurcations of orbits, the uncovering of hidden ghost orbits in complex phase space, and the direct observation of symmetry breaking effects. The method also solves the fundamental convergence problems in semiclassical periodic orbit theories - for both the Berry-Tabor formula and Gutzwiller's trace formula - and can therefore be applied as a novel technique for periodic orbit quantization, i.e., to calculate semiclassical eigenenergies from a finite set of classical periodic orbits. The advantage of periodic orbit quantization by harmonic inversion is the universality and wide applicability of the method, which will be demonstrated in this work for various open and bound systems with underlying regular, chaotic, and even mixed classical dynamics. The efficiency of the method is increased, i.e., the number of orbits required for periodic orbit quantization is reduced, when the harmonic inversion technique is generalized to the analysis of cross-correlated periodic orbit sums. The method provides not only the eigenenergies and resonances of systems but also allows the semiclassical calculation of diagonal matrix elements and, e.g., for atoms in external fields, individual non-diagonal transition strengths. Furthermore, it is possible to include higher order terms of the hbar expanded periodic orbit sum to obtain semiclassical spectra beyond the Gutzwiller and Berry-Tabor approximation.

  20. Joint Institute for Nanoscience Annual Report 2004

    SciTech Connect (OSTI)

    Baer, Donald R.; Campbell, Charles

    2005-02-01

    Due to the inherently interdisciplinary nature of nanoscience and nanotechnology, research in this arena is often significantly enhanced through creative cooperative activities. The Joint Institute for Nanoscience (JIN) is a venture of the University of Washington (UW) and Pacific Northwest National Laboratory (PNNL) to encourage and enhance high impact and high quality nanoscience and nanotechnology research that leverages the strengths and capabilities of both institutions, and to facilitate education in these areas. This report summarizes JIN award activities that took place during fiscal year 2004 and provides a historical list of JIN awardees, their resulting publications, and JIN-related meetings. Major portions of the JIN efforts and resources are dedicated to funding graduate students and postdoctoral research associates to perform research in collaborations jointly directed by PNNL staff scientists and UW professors. JIN fellowships are awarded on the basis of applications that include research proposals. They have been very successful in expanding collaborations between PNNL and UW, which have led to many excellent joint publications and presentations and enhanced the competitiveness of both institutions for external grant funding. JIN-based interactions are playing a significant role in creating new research directions and reshaping existing research programs at both the UW and PNNL. The JIN also co-sponsors workshops on Nanoscale Science and Technology, four of which have been held in Seattle and one in Richland. In addition to involving PNNL staff in various UW nanoscience courses and seminars, a National Science Foundation grant, Development of UW-PNL Collaborative Curriculums in Nano-Science and Technology, has allowed the development of three intensive short courses that are taught by UW faculty, PNNL staff, and faculty from other institutions, including Washington State University, the University of Idaho, Stanford University, and the University of Alaska. The JIN agreement recognizes that cooperation beyond UW and PNNL is highly valuable. Starting in early 2003, efforts were initiated to form a regional communication link called the Northwest Nanoscience and Nanotechnology Network (N4). In concept, N4 is a tool to encourage communication and help identify regional resources and nanoscience and technology activities.

  1. Inverse Problems and Imaging Web site: http://www.aimSciences.org Volume 1, No. 3, 2007, 507523

    E-Print Network [OSTI]

    Leităo, Antonio

    investigate three applications: an inverse problem related to thermoacoustic tomography, a nonlinear inverse different problems: a linear inverse problem related to thermoacoustic tomography, an nonlinear inverse probLK method, to an inverse problem related to thermoacoustic computed tomography, which mathematically can

  2. Eutectic structures in friction spot welding joint of aluminum alloy to copper

    SciTech Connect (OSTI)

    Shen, Junjun, E-mail: junjun.shen@hzg.de; Suhuddin, Uceu F. H.; Cardillo, Maria E. B.; Santos, Jorge F. dos [Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, Solid-State Joining Processes, Max-Planck-Str. 1, 21502 Geesthacht (Germany)

    2014-05-12

    A dissimilar joint of AA5083 Al alloy and copper was produced by friction spot welding. The Al-MgCuAl{sub 2} eutectic in both coupled and divorced manners were found in the weld. At a relatively high temperature, mass transport of Cu due to plastic deformation, material flow, and atomic diffusion, combined with the alloy system of AA5083 are responsible for the ternary eutectic melting.

  3. Reconstructing the knee joint mechanism from kinematic data Irene Reichla

    E-Print Network [OSTI]

    WeinmĂĽller, Ewa B.

    Reconstructing the knee joint mechanism from kinematic data Irene Reichla *, Winfried Auzingerb-1040 Vienna, Austria; c Institute of Mechanics and Mechatronics, Vienna University of Technology, A) The interpretation of joint kinematics data in terms of displacements is a product of the type of movement

  4. Australia and China A Joint Report on the Bilateral Relationship

    E-Print Network [OSTI]

    Political People-to-people links Education Science and technology Energy, the environment and climate change#12;Australia and China A Joint Report on the Bilateral Relationship #12;AUSTRALIA A Joint Report on the Bilateral Relationship #12;Australian Centre on China in the World College of Asia

  5. Majorana Demonstrator Bolted Joint Mechanical and Thermal Analysis

    SciTech Connect (OSTI)

    Aguayo Navarrete, Estanislao; Reid, Douglas J.; Fast, James E.

    2012-06-01

    The MAJORANA DEMONSTRATOR is designed to probe for neutrinoless double-beta decay, an extremely rare process with a half-life in the order of 1026 years. The experiment uses an ultra-low background, high-purity germanium detector array. The germanium crystals are both the source and the detector in this experiment. Operating these crystals as ionizing radiation detectors requires having them under cryogenic conditions (below 90 K). A liquid nitrogen thermosyphon is used to extract the heat from the detectors. The detector channels are arranged in strings and thermally coupled to the thermosyphon through a cold plate. The cold plate is joined to the thermosyphon by a bolted joint. This circular plate is housed inside the cryostat can. This document provides a detailed study of the bolted joint that connects the cold plate and the thermosyphon. An analysis of the mechanical and thermal properties of this bolted joint is presented. The force applied to the joint is derived from the torque applied to each one of the six bolts that form the joint. The thermal conductivity of the joint is measured as a function of applied force. The required heat conductivity for a successful experiment is the combination of the thermal conductivity of the detector string and this joint. The thermal behavior of the joint is experimentally implemented and analyzed in this study.

  6. Tenth Edition SDSU/UCSB GEOGRAPHY JOINT DOCTORAL PROGRAM

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    The selection criteria for this program are outlined in the application materials. The SDSU's Doctoral Program1 Tenth Edition SDSU/UCSB GEOGRAPHY JOINT DOCTORAL PROGRAM STUDENT'S HANDBOOK Table of Contents ................................................................................................................................ 29 #12;SDSU/UCSB GEOGRAPHY JOINT DOCTORAL PROGRAM DOCTORAL STUDENT'S HANDBOOK INTRODUCTION

  7. Introduction of Joint Summer Program (Hong Kong, Taiwan), 2014

    E-Print Network [OSTI]

    Miyashita, Yasushi

    2014 Introduction of Joint Summer Program (Hong Kong, Taiwan), 2014 SONODA Shigeto Professor; Mission of Joint Summer Program 1) ( To understand Hong Kong and Taiwan and their connection with Asia and presenting research findings #12;(1) Hong Kong Program and Taiwan Program (1) * Commonalities 1) Program

  8. A JOINT PROGRAM OF www.bitdegree.ca

    E-Print Network [OSTI]

    Dawson, Jeff W.

    enterprises requiring network design, management and operation. Graduates from the Network Technology programA JOINT PROGRAM OF Network Technology www.bitdegree.ca BACHELOR OF INFORMATION TECHNOLOGY #12;In jointly offer a unique combined Bachelor of Information Technology (BIT) degree and advanced technology

  9. Virtual Welded-Joint Design Integrating Advanced Materials and Processing Technologies

    SciTech Connect (OSTI)

    Yang, Z.; Dong, P.; Liu, S.; Babu, S.; Olson, G.; DebRoy, T.

    2005-04-15

    The primary goal of this project is to increase the fatigue life of a welded-joint by 10 times and to reduce energy use by 25% through product performance and productivity improvements using an integrated modeling approach. The fatigue strength of a welded-joint is currently the bottleneck to design high performance and lightweight welded structures using advanced materials such as high strength steels. In order to achieve high fatigue strength in a welded-joint it is necessary to manage the weld bead shape for lower stress concentration, produce preferable residual stress distribution, and obtain the desired microstructure for improved material toughness and strength. This is a systems challenge that requires the optimization of the welding process, the welding consumable, the base material, as well as the structure design. The concept of virtual welded-joint design has been proposed and established in this project. The goal of virtual welded-joint design is to develop a thorough procedure to predict the relationship of welding process, microstructure, property, residual stress, and the ultimate weld fatigue strength by a systematic modeling approach. The systematic approach combines five sub-models: weld thermal-fluid model, weld microstructure model, weld material property model, weld residual stress model, and weld fatigue model. The systematic approach is thus based on interdisciplinary applied sciences including heat transfer, computational fluid dynamics, materials science, engineering mechanics, and material fracture mechanics. The sub-models are based on existing models with further development. The results from modeling have been validated with critical experiments. The systematic modeling approach has been used to design high fatigue resistant welds considering the combined effects of weld bead geometry, residual stress, microstructure, and material property. In particular, a special welding wire has been developed in this project to introduce compressive residual stress at weld toe for weld fatigue resistance.

  10. Joint Institute for Nanoscience Annual Report 2003

    SciTech Connect (OSTI)

    Baer, Donald R.; Campbell, Charles

    2004-02-01

    The Joint Institute for Nanoscience (JIN) is a cooperative venture of the University of Washington and Pacific Northwest National Laboratory to encourage and enhance high-impact and high-quality nanoscience and nanotechnology of all types. This first annual report for the JIN summarizes activities beginning in 2001 and ending at the close of fiscal year 2003 and therefore represents somewhat less than two years of activities. Major portions of the JIN resources are dedicated to funding graduate students and postdoctoral research associates to perform research in collaborations jointly directed by Pacific Northwest National Laboratory (PNNL) staff scientists and University of Washington (UW) professors. These fellowships were awarded on the basis of applications that included research proposals. JIN co-sponsors an annual Nanoscale Science and Technology Workshop held in Seattle. In addition to involving PNNL staff in various UW nanoscience courses and seminars, a National Science Foundation grant Development of UW-PNL Collaborative Curriculums in Nano-Science and Technology has allowed the development of three intensive short courses that are taught by UW faculty, PNNL staff, and faculty from other institutions, including Washington State University, the University of Idaho, Stanford University, and the University of Alaska. The initial JIN agreement recognized that expansion of cooperation beyond UW and PNNL would be highly valuable. Starting in early 2003, efforts were initiated to form a regional communication link called the Northwest Nanoscience and Nanotechnology Network (N?). In concept, N? is a tool to encourage communication and help identify regional resources and nanoscience and technology activities.

  11. IOP PUBLISHING INVERSE PROBLEMS Inverse Problems 24 (2008) 055021 (18pp) doi:10.1088/0266-5611/24/5/055021

    E-Print Network [OSTI]

    Kunyansky, Leonid

    2008-01-01

    .1088/0266-5611/24/5/055021 Thermoacoustic tomography with detectors on an open curve: an efficient reconstruction algorithm Leonid.iop.org/IP/24/055021 Abstract Practical applications of thermoacoustic tomography require numerical inversion; on the other hand, it is sufficiently stable with respect to noise in the data. Introduction Thermoacoustic

  12. Inverse Problems in Engng, 2002, Vol. 10, No. 5, pp. 467483 INVERSION OF NOISE-FREE LAPLACE

    E-Print Network [OSTI]

    Valkó, Peter

    inversion algorithm; Multi-precision calculation; Test problems INTRODUCTION The basic idea of integral in many applications of science and engineering whenever ordinary and partial differential equations or integral equations are solved. The increasing number of available numerical methods and computer codes has

  13. Plan for the Joint Ensemble Forecast System (JEFS)

    E-Print Network [OSTI]

    Mass, Clifford F.

    by the High Performance Computing Modernization Program. Phase I will produce one of the DDC project

  14. Vitamin D and Systemic Lupus Erythematosus: Bones, Muscles, and Joints

    E-Print Network [OSTI]

    Lane, Nancy E.

    2010-01-01

    Cole DE, Gladman DD, et al. : Vitamin D insuffi- ciency in aJG, Kasamatsu T, et al. : Vitamin D deficiency in patientsBrown AJ: Mechanism of vitamin D action and its regulation.

  15. Joint Environmental Management System (EMS) Declaration of Conformance |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLforLDRDEnergy CopyrightsRoom 1E-245CommitteeDepartment of Energy

  16. Joint Environmental Management System (EMS) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof EnergyApril 2014 | International Nuclear EnergyatJobs

  17. Insights into fold growth using fold-related joint patterns and mechanical stratigraphy

    E-Print Network [OSTI]

    Savage, Heather M.

    Insights into fold growth using fold-related joint patterns and mechanical stratigraphy Heather M Available online 17 September 2010 Keywords: Sheep Mountain Anticline Joint pattern Mechanical stratigraphy, we integrate mechanical stratigraphy with joint pattern analysis to determine relative timing

  18. METAMODELS AS INPUT OF AN OPTIMIZATION ALGORITHM FOR SOLVING AN INVERSE EDDY CURRENT TESTING PROBLEM

    E-Print Network [OSTI]

    Boyer, Edmond

    METAMODELS AS INPUT OF AN OPTIMIZATION ALGORITHM FOR SOLVING AN INVERSE EDDY CURRENT TESTING-Curie, 91192 Gif-sur-Yvette, France Abstract A new mean of solution of eddy current testing (ECT) inverse

  19. Rapid assessment of infill drilling potential using a simulation-based inversion approach 

    E-Print Network [OSTI]

    Gao, Hui

    2006-08-16

    in very heterogeneous reservoirs is limited, based on the analysis of some authors. This study presents a new simulation-based inversion approach for rapid assessment of infill well potential. It differs from typical simulation inversion applications...

  20. Fast Algorithms for Regularized Minimum Norm Solutions to Inverse Problems Irina F. Gorodnitsky

    E-Print Network [OSTI]

    Gorodnitsky, Irina

    Fast Algorithms for Regularized Minimum Norm Solutions to Inverse Problems Irina F. Gorodnitsky- tional algorithms for solving regularized inverse problems. The computationaladvantages are obtained. The algorithms imple- ment two common regularizationprocedures, Tikhonov reg- ularization and Truncated Singular

  1. Weighted Radon transforms for which the Chang approximate inversion formula is precise

    E-Print Network [OSTI]

    Roman Novikov

    2011-01-17

    We describe all weighted Radon transforms on the plane for which the Chang approximate inversion formula is precise. Some subsequent results, including the Cormack type inversion for these transforms, are also given.

  2. Effects of burial history, rock ductility and recovery magnitude on inversion of normal faulted strata 

    E-Print Network [OSTI]

    Kuhle, Nathan John

    2001-01-01

    , and distributed fracturing and folding. The relative contribution of these mechanisms depends on the relative ductility of the rock and magnitude of inversion. Reverse slip on the normal fault and distributed fracturing occur during early stages of inversion...

  3. Ultrafast optical switching of three-dimensional Si inverse opal photonic band gap crystals

    E-Print Network [OSTI]

    Vos, Willem L.

    Ultrafast optical switching of three-dimensional Si inverse opal photonic band gap crystals Tijmen on three-dimensional photonic band gap crystals. Switching the Si inverse opal is achieved by optically

  4. An experimental study of strongly modified emission in inverse opal photonic crystals

    E-Print Network [OSTI]

    Vos, Willem L.

    An experimental study of strongly modified emission in inverse opal photonic crystals A. Femius crystals, made of inverse opals in titania. We show that both the fluorescence quantum efficiency and weak

  5. Glucose-Sensitive Inverse Opal Hydrogels: Analysis of Optical Diffraction Response

    E-Print Network [OSTI]

    Braun, Paul

    Glucose-Sensitive Inverse Opal Hydrogels: Analysis of Optical Diffraction Response Yun-Ju Lee swelling of the inverse opal hydrogel, which was observed through shifts in the optical diffraction

  6. An adaptive importance sampling algorithm for Bayesian inversion with multimodal distributions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Li, Weixuan; Lin, Guang

    2015-03-21

    Parametric uncertainties are encountered in the simulations of many physical systems, and may be reduced by an inverse modeling procedure that calibrates the simulation results to observations on the real system being simulated. Following Bayes’ rule, a general approach for inverse modeling problems is to sample from the posterior distribution of the uncertain model parameters given the observations. However, the large number of repetitive forward simulations required in the sampling process could pose a prohibitive computational burden. This difficulty is particularly challenging when the posterior is multimodal. We present in this paper an adaptive importance sampling algorithm to tackle thesemore »challenges. Two essential ingredients of the algorithm are: 1) a Gaussian mixture (GM) model adaptively constructed as the proposal distribution to approximate the possibly multimodal target posterior, and 2) a mixture of polynomial chaos (PC) expansions, built according to the GM proposal, as a surrogate model to alleviate the computational burden caused by computational-demanding forward model evaluations. In three illustrative examples, the proposed adaptive importance sampling algorithm demonstrates its capabilities of automatically finding a GM proposal with an appropriate number of modes for the specific problem under study, and obtaining a sample accurately and efficiently representing the posterior with limited number of forward simulations.« less

  7. Inverse transport problem solvers based on regularized and compressive sensing techniques

    SciTech Connect (OSTI)

    Cheng, Y.; Cao, L.; Wu, H.; Zhang, H.

    2012-07-01

    According to the direct exposure measurements from flash radiographic image, regularized-based method and compressive sensing (CS)-based method for inverse transport equation are presented. The linear absorption coefficients and interface locations of objects are reconstructed directly at the same time. With a large number of measurements, least-square method is utilized to complete the reconstruction. Owing to the ill-posedness of the inverse problems, regularized algorithm is employed. Tikhonov method is applied with an appropriate posterior regularization parameter to get a meaningful solution. However, it's always very costly to obtain enough measurements. With limited measurements, CS sparse reconstruction technique Orthogonal Matching Pursuit (OMP) is applied to obtain the sparse coefficients by solving an optimization problem. This paper constructs and takes the forward projection matrix rather than Gauss matrix as measurement matrix. In the CS-based algorithm, Fourier expansion and wavelet expansion are adopted to convert an underdetermined system to a well-posed system. Simulations and numerical results of regularized method with appropriate regularization parameter and that of CS-based agree well with the reference value, furthermore, both methods avoid amplifying the noise. (authors)

  8. Electrical detection of liquid lithium leaks from pipe joints

    SciTech Connect (OSTI)

    Schwartz, J. A., E-mail: jschwart@pppl.gov; Jaworski, M. A.; Mehl, J.; Kaita, R.; Mozulay, R. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States)

    2014-11-15

    A test stand for flowing liquid lithium is under construction at Princeton Plasma Physics Laboratory. As liquid lithium reacts with atmospheric gases and water, an electrical interlock system for detecting leaks and safely shutting down the apparatus has been constructed. A defense in depth strategy is taken to minimize the risk and impact of potential leaks. Each demountable joint is diagnosed with a cylindrical copper shell electrically isolated from the loop. By monitoring the electrical resistance between the pipe and the copper shell, a leak of (conductive) liquid lithium can be detected. Any resistance of less than 2 k? trips a relay, shutting off power to the heaters and pump. The system has been successfully tested with liquid gallium as a surrogate liquid metal. The circuit features an extensible number of channels to allow for future expansion of the loop. To ease diagnosis of faults, the status of each channel is shown with an analog front panel LED, and monitored and logged digitally by LabVIEW.

  9. IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 60, NO. 8, AUGUST 2012 4403 Joint Source-Channel Coding and Channelization

    E-Print Network [OSTI]

    Zhang, Tong

    -Channel Coding and Channelization for Embedded Video Processing With Flash Memory Storage Yiran Li, Guiqiang Dong and hence higher data storage/retrieval energy consumption. This clearly demands a system optimizationIEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 60, NO. 8, AUGUST 2012 4403 Joint Source

  10. Energy Department Announces Selections for U.S.-India Joint Clean...

    Office of Environmental Management (EM)

    Selections for U.S.-India Joint Clean Energy Research and Development Center Energy Department Announces Selections for U.S.-India Joint Clean Energy Research and Development...

  11. Potential Risks to International Joint Ventures In Developing Economies: The Ghanaian Construction Industry Experience 

    E-Print Network [OSTI]

    Ahiaga-Dagbui, Dominic D; Fugar, Frank D.K; McCarter, John W; Adinyira, Emmnuel

    International construction companies are increasingly entering into joint ventures with local companies in developing countries to explore perceived profitable opportunities overseas. Joint ventures generally offer a number ...

  12. Generalized Uncertainty Quantification for Linear Inverse Problems in X-ray Imaging

    SciTech Connect (OSTI)

    Fowler, Michael James

    2014-04-25

    In industrial and engineering applications, X-ray radiography has attained wide use as a data collection protocol for the assessment of material properties in cases where direct observation is not possible. The direct measurement of nuclear materials, particularly when they are under explosive or implosive loading, is not feasible, and radiography can serve as a useful tool for obtaining indirect measurements. In such experiments, high energy X-rays are pulsed through a scene containing material of interest, and a detector records a radiograph by measuring the radiation that is not attenuated in the scene. One approach to the analysis of these radiographs is to model the imaging system as an operator that acts upon the object being imaged to produce a radiograph. In this model, the goal is to solve an inverse problem to reconstruct the values of interest in the object, which are typically material properties such as density or areal density. The primary objective in this work is to provide quantitative solutions with uncertainty estimates for three separate applications in X-ray radiography: deconvolution, Abel inversion, and radiation spot shape reconstruction. For each problem, we introduce a new hierarchical Bayesian model for determining a posterior distribution on the unknowns and develop efficient Markov chain Monte Carlo (MCMC) methods for sampling from the posterior. A Poisson likelihood, based on a noise model for photon counts at the detector, is combined with a prior tailored to each application: an edge-localizing prior for deconvolution; a smoothing prior with non-negativity constraints for spot reconstruction; and a full covariance sampling prior based on a Wishart hyperprior for Abel inversion. After developing our methods in a general setting, we demonstrate each model on both synthetically generated datasets, including those from a well known radiation transport code, and real high energy radiographs taken at two U. S. Department of Energy laboratories.

  13. EXPERIMENTAL STUDY OF AXISYMMETRIC INSTABILITY OF INVERSE DEE AND SQUARE TOKAMAK EQUILIBRIA

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    EXPERIMENTAL STUDY OF AXISYMMETRIC INSTABILITY OF INVERSE DEE AND SQUARE TOKAMAK EQUILIBRIA COO Study ofAxi.symmetric !nsta bUity of Inverse Dee and Square Tokamak Equilibria B. Lipschultz, S as a function of time in a tokamak with a 4-null poloidal d ivertor. Inverse dee equilibria are observed

  14. Migration/inversion for Incident Waves Synthesized from Common-Shot Data Gathers

    E-Print Network [OSTI]

    Bleistein, Norman

    to incident plane waves. The primary objective of a migration/inversion process is to detect reflectorsMigration/inversion for Incident Waves Synthesized from Common-Shot Data Gathers Norman Bleistein Presented at the International Meeting of the SEG, 2006 Keywords Kirchhoff inversion, migration

  15. Inversion of the noisy Radon transform on SO(3) by Gabor frames and sparse recovery principles

    E-Print Network [OSTI]

    Teschke, Gerd

    Inversion of the noisy Radon transform on SO(3) by Gabor frames and sparse recovery principles-dimensional Radon transform on the rotation group SO(3) is an ill-posed inverse problem that can be applied to X to stably approximate the inverse of the noisy Radon transform on SO(3). The proposed approach is composed

  16. Anthropogenic emissions of NOx over China: Reconciling the difference of inverse modeling

    E-Print Network [OSTI]

    Boersma, Folkert

    Anthropogenic emissions of NOx over China: Reconciling the difference of inverse modeling results to estimate nitrogen oxides (NOx) emissions in China. Recently, the Global Ozone Monitoring Experiment-2 (GOME NOx emission estimates by applying previously developed monthly inversion (MI) or daily inversion (DI

  17. 1.10 Theory and Observations Seismic Tomography and Inverse Methods

    E-Print Network [OSTI]

    Boschi, Lapo

    least-squares solutions 338 1.10.4.2.2 Occam's inversion and Bayesian methods 340 1.10.4.3 Hypocenter solvers 338 1.10.4.2 Regularized and Constrained Inversion 338 1.10.4.2.1 Generalized inverse and damped

  18. Entropy production for a class of inverse SRB measures Eugen Mihailescu and Mariusz Urbanski

    E-Print Network [OSTI]

    Urbanski, Mariusz

    Entropy production for a class of inverse SRB measures Eugen Mihailescu and Mariusz Urba´nski Abstract We study the entropy production for inverse SRB measures for a class of hyperbolic folded strictly negative entropy production of the respective inverse SRB measures. Moreover we provide concrete

  19. INVERSE KINEMATICS AND DYNAMICS ANALYSIS OF A THREE LEGGED PARALLEL MECHANISM ACTUATED BY AGVs

    E-Print Network [OSTI]

    Saha, Subir Kumar

    1 INVERSE KINEMATICS AND DYNAMICS ANALYSIS OF A THREE LEGGED PARALLEL MECHANISM ACTUATED BY AGVs kinematics and inverse dynamics analysis of a parallel mechanism is presented. The mechanism consists configuration. Inverse kinematics and dynamics analysis is also performed for the three actuators (mobile robots

  20. Accurate calculation of the local density of optical states in inverse-opal

    E-Print Network [OSTI]

    Vos, Willem L.

    Accurate calculation of the local density of optical states in inverse-opal photonic crystals Ivan We have investigated the local density of optical states (LDOS) in titania and silicon inverse opals for many dif- ferent emitter positions and orientations in inverse opals in order to supply a theoretical

  1. DOI: 10.1002/adma.200602792 Filling Fraction Dependent Properties of Inverse Opal Metallic

    E-Print Network [OSTI]

    Braun, Paul

    DOI: 10.1002/adma.200602792 Filling Fraction Dependent Properties of Inverse Opal Metallic Photonic, and battery electrodes.[7] The photonic properties of metallic inverse opal structures have been. However, in prac- tice, experiments on metal inverse opals have been inconclu- sive,[8­10] presumably

  2. Proceedings of the Third International Workshop on Jointed Structures.

    SciTech Connect (OSTI)

    Starr, Michael James; Brake, Matthew Robert; Segalman, Daniel Joseph; Bergman, Lawrence A.; Ewins, David J.

    2013-08-01

    The Third International Workshop on Jointed Structures was held from August 16th to 17th, 2012, in Chicago Illinois, following the ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Thirty two researchers from both the United States and international locations convened to discuss the recent progress of mechanical joints related research and associated efforts in addition to developing a roadmap for the challenges to be addressed over the next five to ten years. These proceedings from the workshop include the minutes of the discussions and follow up from the 2009 workshop [1], presentations, and outcomes of the workshop. Specifically, twelve challenges were formulated from the discussions at the workshop, which focus on developing a better understanding of uncertainty and variability in jointed structures, incorporating high fidelity models of joints in simulations that are tractable/efficient, motivating a new generation of researchers and funding agents as to the importance of joint mechanics research, and developing new insights into the physical phenomena that give rise to energy dissipation in jointed structures. The ultimate goal of these research efforts is to develop a predictive model of joint mechanics.

  3. Effect of filler metal composition on the strength of yttria stabilized zirconia joints brazed with Pd-Ag-CuOx

    SciTech Connect (OSTI)

    Darsell, Jens T.; Weil, K. Scott

    2008-09-08

    The Ag-CuOx system is of interest to be used to be used as an air braze filler metal for joining high temperature electrochemical devices. Previous work has shown that the melting temperatures can be increased by adding palladium to Ag-CuOx and it is expected that this may aid high temperature stability. This work compares the room temperature bend strength of joints made between yttria-stabilized zirconia (YSZ) air brazed using Ag-CuOx without palladium and with 5 and 15mol% palladium additions. It has been found that in general palladium decreases joint strength, especially in low copper oxide compositions filler metals. At high copper oxide contents, brittle fracture through both copper oxide rich phases and the YSZ limits joint strength.

  4. Inverse problem with transmission eigenvalues for the discrete Schrödinger equation

    E-Print Network [OSTI]

    Tuncay Aktosun; Vassilis G. Papanicolaou

    2015-01-28

    The discrete Schr\\"odinger equation with the Dirichlet boundary condition is considered on a half-line lattice when the potential is real valued and compactly supported. The inverse problem of recovery of the potential from the so-called transmission eigenvalues is analyzed. The Marchenko method and the Gel'fand-Levitan method are used to solve the inverse problem uniquely, except in one "unusual" case where the sum of the transmission eigenvalues is equal to a certain integer related to the support of the potential. It is shown that in the unusual case there may be a unique solution corresponding to certain sets of transmission eigenvalues, there may be a finite number of distinct potentials for some sets of transmission eigenvalues, or there may be infinitely many potentials for some sets of transmission eigenvalues. The theory presented is illustrated with several explicit examples.

  5. Elasticity and Glocality: Initiation of Embryonic Inversion in ${\\it Volvox}$

    E-Print Network [OSTI]

    Pierre A. Haas; Raymond E. Goldstein

    2015-07-06

    Elastic objects across a wide range of scales deform under local changes of their intrinsic properties, yet the shapes are ${\\it glocal}$, set by a complicated balance between local properties and global geometric constraints. Here, we explore this interplay during the inversion process of the green alga ${\\it Volvox}$, whose embryos must turn themselves inside out to complete their development. This process has recently been shown [S. H\\"ohn ${\\it et~al}.$, ${\\it Phys. Rev. Lett.}$ $\\textbf{114}$, 178101 (2015)] to be well described by the deformations of an elastic shell under local variations of its intrinsic curvatures and stretches, although the detailed mechanics of the process have remained unclear. Through a combination of asymptotic analysis and numerical studies of the bifurcation behavior, we illustrate how appropriate local deformations can overcome global constraints to initiate inversion.

  6. NN inversion potentials intermediate energy proton-nucleus elastic scattering

    SciTech Connect (OSTI)

    Arellano, H.F.; Brieva, F.A.; Love, W.G.; Geramb, H.V. von

    1995-10-01

    Recently developed nucleon-nucleon interactions using the quantum inverse scattering method shed new fight on the off-shell properties of the internucleon effective force for nucleon-nucleus scattering. Calculations of proton elastic scattering from {sup 40}Ca and {sup 208}Pb in the 500 MeV region show that variations in off-shell contributions are determined to a great extent by the accuracy with which the nucleon-nucleon phase shifts are reproduced. The study is based on the full-folding approach to the nucleon-nucleus optical potential which allows a deep understanding of the interplay between on- and off-shell effects in nucleon scattering. Results and the promising extension offered by the inversion potentials beyond the range of validity of the low-energy internucleon forces will be discussed.

  7. Combined approach to the inverse protein folding problem. Final report

    SciTech Connect (OSTI)

    Ruben A. Abagyan

    2000-06-01

    The main scientific contribution of the project ''Combined approach to the inverse protein folding problem'' submitted in 1996 and funded by the Department of Energy in 1997 is the formulation and development of the idea of the multilink recognition method for identification of functional and structural homologues of newly discovered genes. This idea became very popular after they first announced it and used it in prediction of the threading targets for the CASP2 competition (Critical Assessment of Structure Prediction).

  8. Advances in Inverse Transport Methods and Applications to Neutron Tomography 

    E-Print Network [OSTI]

    Wu, Zeyun

    2011-02-22

    ) tomography method [5?7], which mainly involves the following principles: (1) Radon transform and inverse Radon transform, which maps and anti-maps a transmission line set to a projected point set; (2) Fourier projection-slice theorem (also referred... of the Radon Transform [5,6,59], e.g., line integrals along projection trajectories. With some in- version techniques such as filtered back projection (FBP) applied to the projections, analytic tomography methods are capable of reconstructing material...

  9. Production of Radioactive Nuclides in Inverse Reaction Kinematics

    E-Print Network [OSTI]

    E. Traykov; A. Rogachevskiy; U. Dammalapati; P. Dendooven; O. C. Dermois; K. Jungmann; C. J. G. Onderwater; M. Sohani; L. Willmann; H. W. Wilschut; A. R. Young

    2006-08-08

    Efficient production of short-lived radioactive isotopes in inverse reaction kinematics is an important technique for various applications. It is particularly interesting when the isotope of interest is only a few nucleons away from a stable isotope. In this article production via charge exchange and stripping reactions in combination with a magnetic separator is explored. The relation between the separator transmission efficiency, the production yield, and the choice of beam energy is discussed. The results of some exploratory experiments will be presented.

  10. TCAP HYDROGEN ISOTOPE SEPARATION USING PALLADIUM AND INVERSE COLUMNS

    SciTech Connect (OSTI)

    Heung, L.; Sessions, H.; Xiao, S.

    2010-08-31

    The Thermal Cycling Absorption Process (TCAP) was further studied with a new configuration. Previous configuration used a palladium packed column and a plug flow reverser (PFR). This new configuration uses an inverse column to replace the PFR. The goal was to further improve performance. Both configurations were experimentally tested. The results showed that the new configuration increased the throughput by a factor of more than 2.

  11. Fast Inverse Nonlinear Fourier Transform For Generating Multi-Solitons In Optical Fiber

    E-Print Network [OSTI]

    Wahls, Sander

    2015-01-01

    The achievable data rates of current fiber-optic wavelength-division-multiplexing (WDM) systems are limited by nonlinear interactions between different subchannels. Recently, it was thus proposed to replace the conventional Fourier transform in WDM systems with an appropriately defined nonlinear Fourier transform (NFT). The computational complexity of NFTs is a topic of current research. In this paper, a fast inverse NFT algorithm for the important special case of multi-solitonic signals is presented. The algorithm requires only $\\mathcal{O}(D\\log^{2}D)$ floating point operations to compute $D$ samples of a multi-soliton. To the best of our knowledge, this is the first algorithm for this problem with $\\log^{2}$-linear complexity. The paper also includes a many samples analysis of the generated nonlinear Fourier spectra.

  12. The institutional needs of joint implementation projects

    SciTech Connect (OSTI)

    Watt, E.; Sathaye, J. [Lawrence Berkeley Lab., CA (United States); Buen, O. de; Masera, O. [National Univ. of Mexico, Mexico City (Mexico); Gelil, I.A. [Organization of Energy Conservation and Planning, Cairo (Egypt); Ravindranath, N.H. [Indian Inst. of Science, Bangalore (India); Zhou, D.; Li, J. [Energy Research Inst., Beijing (China); Intarapravich, D. [Thailand Environmental Inst., Bangkok (Thailand)

    1995-10-21

    In this paper, the authors discuss options for developing institutions for joint implementation (JI) projects. They focus on the tasks which are unique to JI projects or require additional institutional needs--accepting the project by the host and investor countries and assessing the project`s greenhouse gas (GHG) emission reduction or sequestration--and they suggest the types of institutions that would enhance their performance. The evaluation is based on four sets of governmental and international criteria for JI projects, the experiences of ten pilot JI projects, and the perspectives of seven collaborating authors from China, Egypt, India, Mexico, and Thailand, who interviewed relevant government and non-government staff involved in JI issue assessment in their countries. After examining the roles for potential JI institutions, they present early findings arguing for a decentralized national JI structure, which includes: (1) national governmental panels providing host country acceptance of proposed JI projects; (2) project parties providing the assessment data on the GHG reduction or sequestration for the projects; (3) technical experts calculating these GHG flows; (4) certified verification teams checking the GHG calculations; and (5) members of an international JI Secretariat training and certifying the assessors, as well as resolving challenges to the verifications. 86 refs.

  13. Final Technical Report for "Applied Mathematics Research: Simulation Based Optimization and Application to Electromagnetic Inverse Problems"

    SciTech Connect (OSTI)

    Haber, Eldad

    2014-03-17

    The focus of research was: Developing adaptive mesh for the solution of Maxwell's equations; Developing a parallel framework for time dependent inverse Maxwell's equations; Developing multilevel methods for optimization problems with inequal- ity constraints; A new inversion code for inverse Maxwell's equations in the 0th frequency (DC resistivity); A new inversion code for inverse Maxwell's equations in low frequency regime. Although the research concentrated on electromagnetic forward and in- verse problems the results of the research was applied to the problem of image registration.

  14. EAGE 65th Conference & Exhibition --Stavanger, Norway, 2 -5 June 2003 Method of inversion of refracted traveltime curves by homogeneous function is very effective.

    E-Print Network [OSTI]

    Belousov, Alexander

    in horizontal and vertical directions and also in respect to existence of seismic boundaries - lines of sharp to details the resulting cross section always corresponds to the system of observation. Process of inversion seismic as well as for reinterpretation of old seismic data. In this paper we show efficiency

  15. Advancing Inverse Sensitivity/Uncertainty Methods for Nuclear Fuel Cycle Applications

    SciTech Connect (OSTI)

    Arbanas, Goran; Williams, Mark L; Leal, Luiz C; Dunn, Michael E; Khuwaileh, Bassam A.; Wang, C; Abdel-Khalik, Hany

    2015-01-01

    The inverse sensitivity/uncertainty quantification (IS/UQ) method has recently been implemented in the Inverse Sensitivity/UnceRtainty Estimiator (INSURE) module of the AMPX system [1]. The IS/UQ method aims to quantify and prioritize the cross section measurements along with uncer- tainties needed to yield a given nuclear application(s) target response uncertainty, and doing this at a minimum cost. Since in some cases the extant uncertainties of the differential cross section data are already near the limits of the present-day state-of-the-art measurements, requiring significantly smaller uncertainties may be unrealistic. Therefore we have incorporated integral benchmark exper- iments (IBEs) data into the IS/UQ method using the generalized linear least-squares method, and have implemented it in the INSURE module. We show how the IS/UQ method could be applied to systematic and statistical uncertainties in a self-consistent way. We show how the IS/UQ method could be used to optimize uncertainties of IBE s and differential cross section data simultaneously.

  16. Albany, OR * Anchorage, AK * Morgantown...

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

    An Advanced Joint Inversion System for CO2 Storage Modeling with Large Date Sets for Characterization and Real- Time Monitoring - Enhancing Storage Performance and Reducing Failure...

  17. United States -- Mexican joint ventures: A case history approach

    SciTech Connect (OSTI)

    Moore, N.L.; Chidester, R.J.; Hughes, K.R.; Fowler, R.A.

    1993-03-01

    Because the Mexican government has encouraged investment in Mexico by increasing the percentage of ownership of a Mexican business that a US company can hold, joint ventures are more attractive now than they had been in the past. This study provides preliminary information for US renewable energy companies who are interested in forming a joint venture with a Mexican company. This report is not intended to be a complete reference but does identifies a number of important factors that should be observed when forming a Mexican joint venture: (1)Successful joint ventures achieve the goals of each partner. (2)It is essential that all parties agree to the allocation of responsibilities. (3)Put everything in writing. (4)Research in depth the country or countries in which you are considering doing business.

  18. New Mexico's Dual Credit Program: A Joint Study of

    E-Print Network [OSTI]

    New Mexico, University of

    New Mexico's Dual Credit Program: A Joint Study of Student Outcomes and Cost EffecAveness A PresentaAon To: New Mexico LegislaAve Finance Commi Abbey, Director July 12, 2012 Rio Rancho, New Mexico Prepared By: Kevin

  19. Canonical Wnt signaling activity during synovial joint development

    E-Print Network [OSTI]

    Yamagami, Takashi; Molotkov, Andrei; Zhou, Chengji J.

    2009-01-01

    West 2002; Yang 2003; Hartmann 2006). Synovial joints arejoint forming gene Gdf5 (Hartmann and Tabin 2001; Guo et al.Genes Dev 18:2404–2417 Hartmann C (2006) A Wnt canon

  20. Research Councils UK Joint Vision For Collaborative Training

    E-Print Network [OSTI]

    Research Councils UK Joint Vision For Collaborative Training Objectives: Research Council Collaborative Training will provide doctoral students with a first- rate, challenging research training experience, within the context of a mutually beneficial research collaboration between academic and partner

  1. JointME&MSEColloquium The Department of Mechanical Engineering & Materials

    E-Print Network [OSTI]

    JointME&MSEColloquium The Department of Mechanical Engineering & Materials Science & Engineering a professor in the Department of Mechanical Engineering and Materials Science Program at University program PRESENTS Dr. Xiaochun Li Raytheon Chair in Manufacturing, Professor of Mechanical and Aerospace

  2. BIOMECHANICS OF FLEXIBLE JOINTS IN THE CALCIFIED SEAWEED CALLIARTHRON CHEILOSPORIOIDES

    E-Print Network [OSTI]

    Denny, Mark

    BIOMECHANICS OF FLEXIBLE JOINTS IN THE CALCIFIED SEAWEED CALLIARTHRON CHEILOSPORIOIDES evolution. In this dissertation, I explore the biomechanics and tissue construction of genicula features found in terrestrial plant xylem but unknown in marine algae. By exploring the biomechanics

  3. DOE-EERE/NIST Joint Workshop on Combinatorial Materials Science...

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

    NIST Joint Workshop on Combinatorial Materials Science for Applications in Energy The Hydrogen Storage Subprogram of the U.S. Department of Energy co-hosted with the NIST...

  4. Modeling of Mechanical Overlap Joints in Magnetic Shields

    E-Print Network [OSTI]

    Crawford, Anthony C

    2015-01-01

    This study determines a useful value to use for the gap width of mechanical overlap joints in models of magnetic shielding. The average value of 0.1 mm is found to agree with measurements.

  5. Method of forming a ceramic to ceramic joint

    DOE Patents [OSTI]

    Cutler, Raymond Ashton; Hutchings, Kent Neal; Kleinlein, Brian Paul; Carolan, Michael Francis

    2010-04-13

    A method of joining at least two sintered bodies to form a composite structure, includes: providing a joint material between joining surfaces of first and second sintered bodies; applying pressure from 1 kP to less than 5 MPa to provide an assembly; heating the assembly to a conforming temperature sufficient to allow the joint material to conform to the joining surfaces; and further heating the assembly to a joining temperature below a minimum sintering temperature of the first and second sintered bodies. The joint material includes organic component(s) and ceramic particles. The ceramic particles constitute 40-75 vol. % of the joint material, and include at least one element of the first and/or second sintered bodies. Composite structures produced by the method are also disclosed.

  6. SEISMIC CAPACITY OF THREADED, BRAZED AND GROOVED PIPE JOINTS

    Office of Energy Efficiency and Renewable Energy (EERE)

    Seismic Capacity of Threaded, Brazed and Grooved Pipe Joints Brent Gutierrez, PhD, PE George Antaki, PE, F.ASME DOE NPH Conference October 25-26, 2011

  7. A study of discrete and continuum joint modeling techniques

    SciTech Connect (OSTI)

    Jung, J.; Brown, S.R.

    1992-05-01

    This paper presents the results of a numerical and experimental study in which finite element and discrete element techniques were used to analyze a layered polycarbonate plate model subjected to uniaxial compression. Also, the two analysis techniques were used to compute the response of an eight meter diameter drift in jointed-rock. The drift was subjected to in-situ and far-field induced thermal stresses. The finite element analyses used a continuum rock model to represent the jointed-rock. A comparison of the analyses showed that the finite element continuum joint model consistently predicted less joint slippage than did the discrete element analyses, although far-field displacements compared well.

  8. An investigation of residual stress in welded joints 

    E-Print Network [OSTI]

    Moffat, William Hugh

    1951-01-01

    . flummery and Conclusions VII. '-. &uggested Procedure for I"uture Investigation 18 o i' VIII. ? . Ppendix IX. Bibliography LIST OP EIGURES Ro. Title Page 1. 'welded Plates snd Gptical Gage Used by Soulton and Martin ~ ~ 6 2. Dr. Rao~s Method... AN INVESTIGATION OF RESIDUAL STRESS IN WELDED JOINTS INTRODUCTION The object of the research reported in this paper was to investigate the magnitude of transverse and longi- tudial residual stress in a welded Joint. These are the stresses in a direction...

  9. Identification and Decoupling Control of Flexure Jointed Hexapods Yixin Chen & John E. McInroy

    E-Print Network [OSTI]

    Chen, Yixin

    Identification and Decoupling Control of Flexure Jointed Hexapods Yixin Chen & John E. Mc of the joint space mass-inertia matrix of flexure jointed hexapods, a new decoupling method is proposed. 1 Introduction Several researchers have developed flexure jointed hexapods for micro

  10. From Use Cases of the Joint European Torus towards Integrated Commissioning Requirements of the ITER Tokamak

    E-Print Network [OSTI]

    From Use Cases of the Joint European Torus towards Integrated Commissioning Requirements of the ITER Tokamak

  11. Development of an Advanced Hydraulic Fracture Mapping System

    SciTech Connect (OSTI)

    Norm Warpinski; Steve Wolhart; Larry Griffin; Eric Davis

    2007-01-31

    The project to develop an advanced hydraulic fracture mapping system consisted of both hardware and analysis components in an effort to build, field, and analyze combined data from tiltmeter and microseismic arrays. The hardware sections of the project included: (1) the building of new tiltmeter housings with feedthroughs for use in conjunction with a microseismic array, (2) the development of a means to use separate telemetry systems for the tilt and microseismic arrays, and (3) the selection and fabrication of an accelerometer sensor system to improve signal-to-noise ratios. The analysis sections of the project included a joint inversion for analysis and interpretation of combined tiltmeter and microseismic data and improved methods for extracting slippage planes and other reservoir information from the microseisms. In addition, testing was performed at various steps in the process to assess the data quality and problems/issues that arose during various parts of the project. A prototype array was successfully tested and a full array is now being fabricated for industrial use.

  12. Survey and analysis of selected jointly owned large-scale electric utility storage projects

    SciTech Connect (OSTI)

    Not Available

    1982-05-01

    The objective of this study was to examine and document the issues surrounding the curtailment in commercialization of large-scale electric storage projects. It was sensed that if these issues could be uncovered, then efforts might be directed toward clearing away these barriers and allowing these technologies to penetrate the market to their maximum potential. Joint-ownership of these projects was seen as a possible solution to overcoming the major barriers, particularly economic barriers, of commercializaton. Therefore, discussions with partners involved in four pumped storage projects took place to identify the difficulties and advantages of joint-ownership agreements. The four plants surveyed included Yards Creek (Public Service Electric and Gas and Jersey Central Power and Light); Seneca (Pennsylvania Electric and Cleveland Electric Illuminating Company); Ludington (Consumers Power and Detroit Edison, and Bath County (Virginia Electric Power Company and Allegheny Power System, Inc.). Also investigated were several pumped storage projects which were never completed. These included Blue Ridge (American Electric Power); Cornwall (Consolidated Edison); Davis (Allegheny Power System, Inc.) and Kttatiny Mountain (General Public Utilities). Institutional, regulatory, technical, environmental, economic, and special issues at each project were investgated, and the conclusions relative to each issue are presented. The major barriers preventing the growth of energy storage are the high cost of these systems in times of extremely high cost of capital, diminishing load growth and regulatory influences which will not allow the building of large-scale storage systems due to environmental objections or other reasons. However, the future for energy storage looks viable despite difficult economic times for the utility industry. Joint-ownership can ease some of the economic hardships for utilites which demonstrate a need for energy storage.

  13. Optical inverse Compton emission from clusters of galaxies

    E-Print Network [OSTI]

    Yamazaki, Ryo

    2015-01-01

    Shocks around clusters of galaxies accelerate electrons which upscatter the Cosmic Microwave Background photons to higher-energies. We use an analytical model to calculate this inverse Compton (IC) emission, taking into account the effects of additional energy losses via synchrotron and Coulomb scattering. We find that the surface brightness of the optical IC emission increases with redshift and halo mass. The IC emission surface brightness, 32--34~mag~arcsec$^{-2}$, for massive clusters is potentially detectable by the newly developed Dragonfly Telephoto Array.

  14. Seismic Attenuation Inversion with t* Using tstarTomog.

    SciTech Connect (OSTI)

    Preston, Leiph

    2014-09-01

    Seismic attenuation is defined as the loss of the seismic wave amplitude as the wave propagates excluding losses strictly due to geometric spreading. Information gleaned from seismic waves can be utilized to solve for the attenuation properties of the earth. One method of solving for earth attenuation properties is called t*. This report will start by introducing the basic theory behind t* and delve into inverse theory as it pertains to how the algorithm called tstarTomog inverts for attenuation properties using t* observations. This report also describes how to use the tstarTomog package to go from observed data to a 3-D model of attenuation structure in the earth.

  15. The equivalence of inverse Compton scattering and the undulator concept

    SciTech Connect (OSTI)

    Ng, K.Y,; /Fermilab

    2009-08-01

    Inverse Compton scattering is a method to produce very high frequency photon beam. However, the production mechanism can also be viewed as a undulator emission. This is because the electron sees electric and magnetic fields of the incident laser beam and is driven into transverse oscillatory motion in exactly the same way when the electron passes through a undulator consisting of alternating magnetic field. This note gives a detailed examination of the similarity about the two views. Equivalent undulator parameters are derived for the incident laser beam, as well as the differential cross section of photon emission.

  16. Inflation in the generalized inverse power law scenario

    SciTech Connect (OSTI)

    Lu, Zhun

    2013-11-01

    We propose a single field inflationary model by generalizing the inverse power law potential from the intermediate model. We study the implication of our model on the primordial anisotropy of cosmological microwave background radiation. Specifically, we apply the slow-roll approximation to calculate the scalar spectral tilt n{sub s} and the tensor-to-scalar ratio r. The results are compared with the recent data measured by the Planck satellite. We find that by choosing proper values for the parameters, our model can well describe the Planck data.

  17. Dipolar second harmonic generation in inversion symmetric materials

    E-Print Network [OSTI]

    Hardhienata, Hendradi; Prylepa, Andrii; Reitböck, Cornelia; Hingerl, Kurt

    2012-01-01

    It is generally argued that material classes with inversion symmetry such as silicon do not produce bulk dipole related second harmonic generation (SHG). So, SHG is then either ascribed to surface effects or bulk related electric quadrupol or magnetic dipole effects. In this letter we show analytically that due to the fact of the decaying harmonic electric field certain Si facets, as eg. Si(111), produce a bulk dipole SHG response and we propose an experiment, exploiting the different dispersion for the fundamental as well as frequency doubled radiation to determine this effect.

  18. Reissner-Nordstrom Black Holes in the Inverse Electrodynamics Model

    E-Print Network [OSTI]

    J. A. R. Cembranos; A. de la Cruz-Dombriz; J. Jarillo

    2015-02-26

    We study electric and magnetic monopoles in static, spherically symmetric and constant curvature geometries in the context of the inverse electrodynamics model. We prove that this U(1) invariant Lagrangian density is able to support the standard metric of a Reissner-Nordstrom Black Hole, but with more complex thermodynamical properties than in the standard case. By employing the Euclidean Action approach we perform a complete analysis of its phase space depending on the sign and singularities of the heat capacity and the Helmholtz free energy.

  19. Inversion formulas for the broken-ray Radon transform

    E-Print Network [OSTI]

    Lucia Florescu; Vadim A. Markel; John C. Schotland

    2010-07-23

    We consider the inverse problem of the broken ray transform (sometimes also referred to as the V-line transform). Explicit image reconstruction formulas are derived and tested numerically. The obtained formulas are generalizations of the filtered backprojection formula of the conventional Radon transform. The advantages of the broken ray transform include the possibility to reconstruct the absorption and the scattering coefficients of the medium simultaneously and the possibility to utilize scattered radiation which, in the case of the conventional X-ray tomography, is typically discarded.

  20. Inverse determination of effective mechanical properties of adhesive bondlines

    E-Print Network [OSTI]

    Hass, Philipp; Mendoza, Miller; Herrmann, Hans J; Niemz, Peter

    2015-01-01

    A new approach for determining effective mechanical bondline properties using a combined experimental-numerical modal analysis technique is proposed. After characterizing clear spruce wood boards, an adhesive layer is applied to the boards surfaces. The shift of the eigenfrequencies resulting from the adhesive layer together with information on the bondline geometry can then be used to inversely determine the mechanical properties of the adhesive layer using Finite Element Models. The calculated values for clear wood as well as for the adhesive layer lie within reasonable ranges, thus demonstrating the methods potential.