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1

Transformation inverse design  

E-Print Network [OSTI]

We present a new technique for the design of transformation-optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds, which is ...

Liu, David

2

Center for Inverse Design: Publications  

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

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3

Center for Inverse Design: Publications  

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

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4

Inverse Design: Playing "Jeopardy" in Materials Science (A "Life at the Frontiers of Energy Research" contest entry from the 2011 Energy Frontier Research Centers (EFRCs) Summit and Forum)  

ScienceCinema (OSTI)

'Inverse Design: Playing 'Jeopardy' in Materials Science' was submitted by the Center for Inverse Design (CID) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. CID, an EFRC directed by Bill Tumas at the National Renewable Energy Laboratory is a partnership of scientists from five institutions: NREL (lead), Northwestern University, University of Colorado, Stanford University, and Oregon State University. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges. The mission of the Center for Inverse Design is 'to replace trial-and-error methods used in the development of materials for solar energy conversion with an inverse design approach powered by theory and computation.' Research topics are: solar photovoltaic, photonic, metamaterial, defects, spin dynamics, matter by design, novel materials synthesis, and defect tolerant materials.

Alex Zunger (former Director, Center for Inverse Design); Tumas, Bill (Director, Center for Inverse Design); CID Staff

2011-11-02T23:59:59.000Z

5

Improving Collision Induced Dissociation (CID), High Energy Collision...  

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

Collision Induced Dissociation (CID), High Energy Collision Dissociation (HCD), and Electron Transfer Dissociation Improving Collision Induced Dissociation (CID), High Energy...

6

STATE OF CALIFORNIA CHARGE INDICATOR DISPLAY (CID)  

E-Print Network [OSTI]

RA3.4.2. If refrigerant charge verification is required for compliance, and a CID has been installed compliance with the refrigerant charge verification requirement for that system, thus submittal of a standard refrigerant charge verification compliance form (MECH 25) is not required for a system that has a passing CID

7

Inverse transonic wing design on a vector processer  

E-Print Network [OSTI]

of the flowfield, the new airfoil shape could be calculated from continuity considerations. perhaps the most recent method developed for transonic w' ng design was presented in 1981 by Shanker . This technique is a full potential method which utilizes.... Carlson An inverse transoric wing design method suitable for use on a vec- tor processer is presented. This method is based on the three dimen- sional, full potential flow equation written in conservation fc m. The technique for calculating the airfoil...

Anderson, William Kyle

1982-01-01T23:59:59.000Z

8

Evolving Design Rules for the Inverse Granular Packing Problem  

E-Print Network [OSTI]

If a collection of identical particles is poured into a container, different shapes will fill to different densities. But what is the shape that fills a container as close as possible to a pre-specified, desired density? We demonstrate a solution to this inverse-packing problem by framing it in the context of artificial evolution. By representing shapes as bonded spheres, we show how shapes may be mutated, simulated, and selected to produce particularly dense or loose packing aggregates, both with and without friction. Moreover, we show how motifs emerge linking these shapes together. The result is a set of design rules that function as an effective solution to the inverse packing problem for given packing procedures and boundary conditions. Finally, we show that these results are verified by experiments on 3D-printed prototypes used to make packings in the real world.

Marc Z. Miskin; Heinrich M. Jaeger

2014-03-17T23:59:59.000Z

9

Comparison of methods for inverse design of radiant enclosures.  

SciTech Connect (OSTI)

A particular inverse design problem is proposed as a benchmark for comparison of five solution techniques used in design of enclosures with radiating sources. The enclosure is three-dimensional and includes some surfaces that are diffuse and others that are specular diffuse. Two aspect ratios are treated. The problem is completely described, and solutions are presented as obtained by the Tikhonov method, truncated singular value decomposition, conjugate gradient regularization, quasi-Newton minimization, and simulated annealing. All of the solutions use a common set of exchange factors computed by Monte Carlo, and smoothed by a constrained maximum likelihood estimation technique that imposes conservation, reciprocity, and non-negativity. Solutions obtained by the various methods are presented and compared, and the relative advantages and disadvantages of these methods are summarized.

Fran­ca, Francis (Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil); Larsen, Marvin Elwood; Howell, John R. (University of Texas at Austin, Austin, TX); Daun, Kyle (National Research Council of Canada Laboratory, Ottawa, Canada); Leduc, Guillaume (Laboratoire d< U+2019> EnergÔetique, UniversitÔe Paul Sabatier, Toulouse, France)

2005-03-01T23:59:59.000Z

10

Advanced inverse techniques for the design of directional solidi cation processes  

E-Print Network [OSTI]

Advanced inverse techniques for the design of directional solidi cation processes Nicholas Zabaras methodologies for thermal process design can be developed using inverse problem theory. Such techniques the problem of designing the mold cooling/heating conditions such that stable solidi cation growth is obtained

Zabaras, Nicholas J.

11

Performance of CID camera X-ray imagers at NIF in a harsh neutron environment  

SciTech Connect (OSTI)

Charge-injection devices (CIDs) are solid-state 2D imaging sensors similar to CCDs, but their distinct architecture makes CIDs more resistant to ionizing radiation.1–3 CID cameras have been used extensively for X-ray imaging at the OMEGA Laser Facility4,5 with neutron fluences at the sensor approaching 109 n/cm2 (DT, 14 MeV). A CID Camera X-ray Imager (CCXI) system has been designed and implemented at NIF that can be used as a rad-hard electronic-readout alternative for time-integrated X-ray imaging. This paper describes the design and implementation of the system, calibration of the sensor for X-rays in the 3 – 14 keV energy range, and preliminary data acquired on NIF shots over a range of neutron yields. The upper limit of neutron fluence at which CCXI can acquire useable images is ~ 108 n/cm2 and there are noise problems that need further improvement, but the sensor has proven to be very robust in surviving high yield shots (~ 1014 DT neutrons) with minimal damage.

Palmer, N. E. [LLNL; Schneider, M. B. [LLNL; Bell, P. M. [LLNL; Piston, K. W. [LLNL; Moody, J. D. [LLNL; James, D. L. [LLNL; Ness, R. A. [LLNL; Haugh, M. J. [NSTec; Lee, J. J. [NSTec; Romano, E. D. [NSTec

2013-09-01T23:59:59.000Z

12

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

E-Print Network [OSTI]

Photonic innovation is becoming ever more important in the modern world. Optical systems are dominating shorter and shorter communications distances, LED's are rapidly emerging for a variety of applications, and solar cells show potential to be a mainstream technology in the energy space. The need for novel, energy-efficient photonic and optoelectronic devices will only increase. This work unites fundamental physics and a novel computational inverse design approach towards such innovation. The first half of the dissertation is devoted to the physics of high-efficiency solar cells. As solar cells approach fundamental efficiency limits, their internal physics transforms. Photonic considerations, instead of electronic ones, are the key to reaching the highest voltages and efficiencies. Proper photon management led to Alta Device's recent dramatic increase of the solar cell efficiency record to 28.3%. Moreover, approaching the Shockley-Queisser limit for any solar cell technology will require light extraction to ...

Miller, Owen D

2013-01-01T23:59:59.000Z

13

Center for Inverse Design: Partner Institutions in the Center for Inverse  

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

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14

Direct Wing Design and Inverse Airfoil Identification with the Nonlinear Weissinger Method  

E-Print Network [OSTI]

A vortex-lattice method for wing aerodynamics that uses nonlinear airfoil data is presented. Two applications of this procedure are presented: Direct Design of a Flying Wing and Inverse Identification from wind tunnel measurements with low-aspect ratio wings. A Newton method is employed, which not only allows very fast solutions to the nonlinear equations but enables the calculation of static and dynamic stability and control derivatives without further cost.

Ranneberg, Maximilian

2015-01-01T23:59:59.000Z

15

Computational ligand design and analysis in protein complexes using inverse methods, combinatorial search, and accurate solvation modeling  

E-Print Network [OSTI]

This thesis presents the development and application of several computational techniques to aid in the design and analysis of small molecules and peptides that bind to protein targets. First, an inverse small-molecule ...

Altman, Michael Darren

2006-01-01T23:59:59.000Z

16

CID | U.S. DOE Office of Science (SC)  

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

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17

CID Gas Recovery Biomass Facility | 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 Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBoston Areais3: Crystalline Rock - BasementCEPIS JumpCETCCIA-The WorldCID

18

Verification, optimization and refinement of a direct-inverse transonic wing design method including weak viscous interaction  

E-Print Network [OSTI]

and Refinement of a. Direct-Inverse Transonic Wing Design Method Including Weak Viscous Interaction. (August 1989) Robert R. Ratcliff, B. S. , Texas A&M University Chair oi' Advisory Committee: Dr. Leland A. Carlson New developments in the direct-inverse wing... AND DISCUSSION . 92 VI V. 1 Bound&ary L&iyer and Wake Effects . . V. 2 Spanwise Grid Skewness V. 3 Wing Planform Effects V. 4 Initial Profile Efi'ects V. 5 Pressure Distribution Compatibility V. 6 Grid Refinement Effects . . V. 7 Fixed Trailing Edge...

Ratcliff, Robert R.

2012-06-07T23:59:59.000Z

19

Lineare Algebra I (lehramtsbezogen) https://www.mi.fu-berlin.de/kvv/course.htm?cid=10310  

E-Print Network [OSTI]

Lineare Algebra I (lehramtsbezogen) https://www.mi.fu-berlin.de/kvv/course.htm?cid=10310 -- kein@math.fu-berlin.de http://page.mi.fu-berlin.de/gmziegler/ FU Berlin, Winter 2011/2012 0. Lineare Geometrie des n¨uhrung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mi, 19. Oktober 2. Feststellungstest

Ziegler, GĂĽnter M.

20

Spring 2005 IEM 5990, 352, CID#18361 RFID Applications in Manufacturing Systems  

E-Print Network [OSTI]

to the various aspects of manufacturing systems. The focus will be on studying the data management, abstraction monitoring systems with nonlinear dynamic systems theory--for improving quality and integritySpring 2005 IEM 5990, 352, CID#18361 RFID Applications in Manufacturing Systems: (Towards Improving

Bukkapatnam, Satish T.S.

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


21

Center for Inverse Design: Inverse Design Approach  

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

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22

Inverse Problems, Design and Optimization Symposium (IPDO-2013) Albi, France, June 26-28, 2013  

E-Print Network [OSTI]

and unidirectional way to carry out electricity from centralized power plants to consumers [1,2]. Actually to be optimally designed. So, we used first the TRNSYS software to model the thermal behaviour of a single and batteries for electricity storage. The results we obtained in simulation prove that one can design

Paris-Sud XI, Université de

23

Design of digital circuits using inverse-mode cascode SiGe HBTs for single event upset mitigation.  

SciTech Connect (OSTI)

We report on the design and measured results of a new SiGe HBT radiation hardening by design technique called the 'inverse-mode cascode' (IMC). A third-generation SiGe HBT IMC device was tested in a time resolved ion beam induced charge collection (TRIBICC) system, and was found to have over a 75% reduction in peak current transients with the use of an n-Tiedown on the IMC sub-collector node. Digital shift registers in a 1st-generation SiGe HBT technology were designed and measured under a heavy-ion beam, and shown to increase the LET threshold over standard npn only shift registers. Using the CREME96 tool, the expected orbital bit-errors/day were simulated to be approximately 70% lower with the IMC shift register. These measured results help demonstrate the efficacy of using the IMC device as a low-cost means for improving the SEE radiation hardness of SiGe HBT technology without increasing area or power.

Thrivikraman, Tushar K. (Georgia Institute of Technology, Atlanta, GA); Phillips, Stanley D. (Georgia Institute of Technology, Atlanta, GA); Dodd, Paul Emerson; Cressler, John D. (Georgia Institute of Technology, Atlanta, GA); Marshall, Paul W. (Consultant to NASA, Brookneal, VA); Vizkelethy, Gyorgy; Marshall, Cheryl (NASA Goddard Space Flight Center, Greenbelt, MD); Wilcox, Edward (Georgia Institute of Technology, Atlanta, GA)

2010-07-01T23:59:59.000Z

24

Inverse Problems, Design and Optimization Symposium (IPDO-2013) Albi, France, June 26-28, 2013  

E-Print Network [OSTI]

Nash game, devised to reduce a secondary criterion while causing the least degradation to the first to maintain forward motion (to be minimized) 1 INTRODUCTION In engineering design, optimization may proceed consumption, environmental impact); in a second step, one is concerned with the optimization of aerodynamic

Paris-Sud XI, Université de

25

Center for Inverse Design  

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

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26

Fast methods for inverse wave scattering problems  

E-Print Network [OSTI]

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

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

2008-01-01T23:59:59.000Z

27

Center for Inverse Design: About the Center for Inverse Design  

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

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28

Optimal Contracts for Outsourced Computation Viet Pham, MHR. Khouzani, Carlos Cid, Royal Holloway University of London  

E-Print Network [OSTI]

- terrestrial life (SETI@Home), investigation of protein folding and computational drug design (Folding@Home

29

Implementation of low-energy surface-induced dissociation (eV SID) and high-energy collision-induced dissociation (keV CID)  

E-Print Network [OSTI]

Implementation of low-energy surface-induced dissociation (eV SID) and high-energy collision is that the instrument implements both high-energy collision-induced dissociation (keV CID) and low-energy surface energy expression, E mv2 /2. As pointed out in the foreword to Cotter's book on TOF mass spectrometry [1

Wysocki, Vicki H.

30

Optimal Contracts for Outsourced Computation Viet Pham, MHR. Khouzani, Carlos Cid, Royal Holloway University of London  

E-Print Network [OSTI]

of protein folding and computational drug design (Folding@Home and Rosetta@home). Businesses from different

31

Center for Inverse Design: Modality 1 - Inverse Band Structure  

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

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32

Estimation of capillary pressure and relative permeability from formation-tester measurements using Design of Experiment and data-weighing inversion  

E-Print Network [OSTI]

Torres-VerdĂ­n b , Abdolhamid Hadibeik b , Kamy Sepehrnoori b a ExxonMobil Upstream Research Company Design of Experiment DoE petrophysics well logging reservoir simulation Laboratory measurements of relative permeability curves from resistivity logs (Ramakrishnan and Wilkinson, 1999; Zeybek et al., 2004

Torres-VerdĂ­n, Carlos

33

Global optimization in inverse problem of scatterometry  

E-Print Network [OSTI]

Global optimization in inverse problem of scatterometry Lekbir Afraites1,2 Jerome Hazard3 Patrick as a parametric optimization problem using the Least Square criterion. In this work, a design procedure for global robust optimization is developed using Kriging and global optimization approaches. Robustness

Paris-Sud XI, Université de

34

Inverse Problems in Systems Biology  

E-Print Network [OSTI]

Inverse Problems in Systems Biology Heinz W.Engl Johann Radon Institute for Computational.W. Engl, C. Flamm, P. K¨ugler, J. Lu, S. M¨uller and P. Schuster, Inverse problems in systems biology, Inverse Problems 25 (2009) 1 #12;Systems biology is a relatively young biological discipline that claims

Fulmek, Markus

35

INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION  

E-Print Network [OSTI]

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

Halligan, Daniel

36

Center for Inverse Design: Staff Biographies  

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

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37

Center for Inverse Design Home Page  

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

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38

Inverse Design Summer School brochure, Sept 2011  

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

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39

Center for Inverse Design: Need Help?  

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

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40

Robust inversion, dimensionality reduction, and randomized sampling  

E-Print Network [OSTI]

Nov 17, 2011 ... Keywords: inverse problems, seismic inversion, stochastic optimization, robust estimation. Category 1: Nonlinear Optimization. Category 2: ...

Aleksandr Aravkin

2011-11-17T23:59:59.000Z

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


41

Inverse free-electron laser accelerator  

SciTech Connect (OSTI)

We first describe the basic physical properties of an inverse free-electron laser and make an estimate of the order of magnitude of the accelerating field obtainable with such a system; then apply the general ideas to the design of an actual device and through this example we give a more accurate evaluation of the fundamental as well as the technical limitations that this acceleration scheme imposes.

Pellegrini, C.; Campisi, R.

1982-01-01T23:59:59.000Z

42

ANALYSIS OF SULFONATES IN AQUEOUS SAMPLES BY ION-PAIR LC/ESI-MS/MS WITH IN-SOURCE CID FOR ADDUCT PEAK ELIMINATION  

SciTech Connect (OSTI)

Determination of low-molecular-weight organic sulfonates (e.g. taurine and cysteic acid) in aqueous solutions is important in many applications of biological, environmental and pharmaceutical sciences. These compounds are difficult to be determined by commonly used reversed-phase liquid chromatographic separation combined with UV-Visible detection because of their high solubility and the lack chromophoric moieties. Here the authors report a method combining ion-pair liquid chromatography and electrospray ionization tandem mass spectrometry (IPLC/ESI-MS/MS)for determining sulfonates. The ability of low-molecular-weight sulfonates to form ion-pairs with quaternary ammonium cations in aqueous solutions allowed LC separation with a C{sub 18} column. Detection of the sulfonates was accomplished with ESI-MS that lends a universal mode of mass detection for polar, water soluble compounds. An in-source collision induced dissociation (CID) was applied to eliminate the adduct peaks in mass spectra. Characteristic marker ions showed in the second stage mass spectra lent a method for identifying sulfonates.

OUYANG,S.; VAIRAVAMURTHY,M.A.

1999-06-13T23:59:59.000Z

43

A study of generalized inverses  

E-Print Network [OSTI]

A STUDY OF GENERALIZED INVERSES A Thesis by NANCY LEE MCKINNEY Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1973 Major Subject: Mathematics A... STUDY OF GENERALIZED INVERSES A Thesis by NANCY LEE MCKINNEY Approved as to style and content by: airman o ittee Hea o epartment e er Me er August 1973 ABSTRACT A Study of Generalized Inverses. (August 1973) Nancy Lee NcKinney, B. A...

McKinney, Nancy Lee

1973-01-01T23:59:59.000Z

44

Inverse problems in multifractal analysis  

E-Print Network [OSTI]

Multifractal formalism is designed to describe the distribution at small scales of the elements of $\\mathcal M^+_c(\\R^d)$, the set of positive, finite and compactly supported Borel measures on $\\R^d$. It is valid for such a measure $\\mu$ when its Hausdorff spectrum is the upper semi-continuous function given by the concave Legendre-Fenchel transform of the free energy function $\\tau_\\mu$ associated with $\\mu$; this is the case for fundamental classes of exact dimensional measures. For any function $\\tau$ candidate to be the free energy function of some $\\mu\\in \\mathcal M^+_c(\\R^d)$, we build such a measure, exact dimensional, and obeying the multifractal formalism. This result is extended to a refined formalism considering jointly Hausdorff and packing spectra. Also, for any upper semi-continuous function candidate to be the lower Hausdorff spectrum of some exact dimensional $\\mu\\in\\mathcal M^+_c(\\R^d)$, we build such a measure. Our results transfer to the analoguous inverse problems in multifractal analysis of H\\"older continuous functions.

Julien Barral

2014-09-29T23:59:59.000Z

45

Modelling approach for the Simulation-Based Preliminary Design of Power Transmissions  

E-Print Network [OSTI]

). Keywords: ball-screw, flight control, inverse simulation, model based design, Modelica, modelling

Boyer, Edmond

46

Center for Inverse Design: Organization of the Center for Inverse Design  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhiteLost

47

Inverse Problems in Transport Theory  

E-Print Network [OSTI]

This paper is a review of the recent progress in the study of inverse problems for the transport equation in Rn, n ? 2 by the author and M. Choulli [CSt1], [CSt2], ...

48

An Ankle-Foot Prosthesis Emulator with Control of Plantarflexion and Inversion-Eversion Torques  

E-Print Network [OSTI]

An Ankle-Foot Prosthesis Emulator with Control of Plantarflexion and Inversion-Eversion Torques Steven H. Collins,1,2,, Myunghee Kim,1, Tianjian Chen1, and Tianyao Chen3 Abstract--Ankle inversion, in robotic devices could improve balance for people with amputation. We designed a tethered ankle

Collins, Steven H.

49

PROGRESS ON A NEW EXPERIMENTAL TEST OF THE GRAVITATIONAL INVERSE-SQUARE LAW  

E-Print Network [OSTI]

1 PROGRESS ON A NEW EXPERIMENTAL TEST OF THE GRAVITATIONAL INVERSE-SQUARE LAW R.M. BONICALZI, P from an oscillating torsion-pendulum experiment searching for gravitational inverse square law Relativity, i.e. Newton's Law of Universal Gravitation. The experiment reported here is designed

Newman, Riley D.

50

Inversion of the star transform  

E-Print Network [OSTI]

We define the star transform as a generalization of the broken ray transform introduced by us in previous work. The advantages of using the star transform include the possibility to reconstruct the absorption and the scattering coefficients of the medium separately and simultaneously (from the same data) and the possibility to utilize scattered radiation which, in the case of the conventional X-ray tomography, is discarded. In this paper, we derive the star transform from physical principles, discuss its mathematical properties and analyze numerical stability of inversion. In particular, it is shown that stable inversion of the star transform can be obtained only for configurations involving odd number of rays. Several computationally-efficient inversion algorithms are derived and tested numerically.

Fan Zhao; John C. Schotland; Vadim A. Markel

2014-05-06T23:59:59.000Z

51

MIT inverse Compton source concept  

E-Print Network [OSTI]

A compact X-ray source based on inverse Compton scattering of a high-power laser on a high-brightness linac beam is described. The facility can operate in two modes: at high (MHz) repetition rate with flux and brilliance ...

Graves, William S.

52

Tritium management in fusion synfuel designs  

SciTech Connect (OSTI)

Two blanket types are being studied: a lithium-sodium pool boiler and a lithium-oxide- or lithium-sodium pool boiler and a lithium-oxide- or aluminate-microsphere moving bed. For each, a wide variety of current technology was considered in handling the tritium. Here, we show the pool boiler with the sulfur-iodine thermochemical cycle first developed and now being piloted by the General Atomic Company. The tritium (T/sub 2/) will be generated in the lithium-sodium mixture where the concentration is approx. 10 ppM and held constant by a scavenging system consisting mainly of permeators. An intermediate sodium loop carries the blanket heat to the thermochemical cycle, and the T/sub 2/ in this loop is held to 1 ppM by a similar scavenging system. With this design, we have maintained blanket inventory at 1 kg of tritium, kept thermochemical cycle losses to 5 Ci/d and environmental loss to 10 Ci/d, and held total plant risk inventory at 7 kg tritium.

Galloway, T.R.

1980-04-25T23:59:59.000Z

53

Improvements, Evaluation, and Application of 1D Vetem Inversion and Development and Application of 3D Vetem Inversion to Waste Pits at The Idaho National Engineering and Environmental Laboratory  

SciTech Connect (OSTI)

The project aim was the improvement, evaluation, and application of one dimensional (1D) inversion and development and application of three dimensional (3D) inversion to processing of data collected at waste pits at the Idaho National Engineering and Environmental Laboratory. The inversion methods were intended mainly for the Very Early Time Electromagnetic (VETEM) system which was designed to improve the state-of-the-art of electromagnetic imaging of the shallow (0 to about 5m) subsurface through electrically conductive soils.

Weng Cho Chew

2004-10-27T23:59:59.000Z

54

Inverse operator representations of quantum phase  

E-Print Network [OSTI]

We define quantum phase in terms of inverses of annihilation and creation operators. We show that like Susskind - Glogower phase operators, the measured phase operators and the unitary phase operators can be defined in terms of the inverse operators. However, for the unitary phase operator the Hilbert space includes the negative energy states. The quantum phase in inverse operator representation may find the applications in the field of quantum optics particularly in the squeezed states.

G. M. Saxena

2008-03-14T23:59:59.000Z

55

Inverse hydrochemical models of aqueous extracts tests  

E-Print Network [OSTI]

Samper, J. , Yang, C. , Montenegro, L. , 2003. Users ManualSamper, J. , Vázquez, A. , Montenegro, L. , 2005. Inverse563. Samper, J. , Zhang, G. , Montenegro, L. , 2006. Coupled

Zheng, L.

2010-01-01T23:59:59.000Z

56

INVERSE SCATTERING OF SEISMIC DATA WITH THE ...  

E-Print Network [OSTI]

We discuss the inverse scattering of seismic reflection data making use of the generalized Radon transform. Through an extension, the relevant transform attains ...

1910-61-22T23:59:59.000Z

57

Summarizing and Mining Inverse Distributions on Data Streams via Dynamic Inverse Sampling  

E-Print Network [OSTI]

Summarizing and Mining Inverse Distributions on Data Streams via Dynamic Inverse Sampling Graham data stream management systems approach this problem by sum- marizing and mining the distributions for summariz- ing and mining inverse distributions of data streams: they rely on a novel technique to maintain

Cormode, Graham

58

Inverse free electron laser accelerator for advanced light sources  

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

We discuss the inverse free electron laser (IFEL) scheme as a compact high gradient accelerator solution for driving advanced light sources such as a soft x-ray free electron laser amplifier or an inverse Compton scattering based gamma-ray source. In particular, we present a series of new developments aimed at improving the design of future IFEL accelerators. These include a new procedure to optimize the choice of the undulator tapering, a new concept for prebunching which greatly improves the fraction of trapped particles and the final energy spread, and a self-consistent study of beam loading effects which leads to an energy-efficient high laser-to-beam power conversion.

Duris, J. P.; Musumeci, P.; Li, R. K.

2012-06-01T23:59:59.000Z

59

Positive and inverse isotope effect on superconductivity  

E-Print Network [OSTI]

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.

Tian De Cao

2009-09-04T23:59:59.000Z

60

Center for Inverse Design: Collaboration Tool for the Center for Inverse  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASL Symposium:and TechnicalTheory and Organization

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


61

Compact x-ray source based on burst-mode inverse Compton scattering at 100 kHz  

E-Print Network [OSTI]

A design for a compact x-ray light source (CXLS) with flux and brilliance orders of magnitude beyond existing laboratory scale sources is presented. The source is based on inverse Compton scattering of a high brightness ...

Bessuille, J.

62

MODEL SELECTION FOR SPECTROPOLARIMETRIC INVERSIONS  

SciTech Connect (OSTI)

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.

Asensio Ramos, A.; Manso Sainz, R.; Martinez Gonzalez, M. J.; Socas-Navarro, H. [Instituto de Astrofisica de Canarias, E-38205, La Laguna, Tenerife (Spain); Viticchie, B. [ESA/ESTEC RSSD, Keplerlaan 1, 2200 AG Noordwijk (Netherlands); Orozco Suarez, D., E-mail: aasensio@iac.es [National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan)

2012-04-01T23:59:59.000Z

63

Inversion-free, noiseless Raman echoes  

E-Print Network [OSTI]

Using double optical Raman rephasing, an inversion-free resonant Raman echo is studied in an inhomogeneously broadened spin ensemble of a solid medium, where the Raman optical field-excited spin coherence has a frozen propagation vector. Unlike photon echoes whose quantum memory application is strictly limited due to \\pi rephasing pulse-induced population inversion causing quantum noises, the optical Raman field-excited spin echo is inherently silent owing to the frozen propagation vector. Thus, the doubly rephased Raman echo can be directly applied for quantum interface in a population inversion-free environment.

Byoung S. Ham

2011-11-20T23:59:59.000Z

64

Hybrid Motion Control combining Inverse Kinematics and Inverse Dynamics Controllers  

E-Print Network [OSTI]

environments provides the possibility to explore novel solutions for designing virtual characters interacting research. Most of the contributions have addressed the control of articulated figures using robotics Trajectories End-effector Trajectories (XS , S , S) T XT Cartesian Space Physics Modeling Virtual Performer

Paris-Sud XI, Université de

65

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 ...

66

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

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

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....

67

Inverse-design and optimization methods for centrifugal pump impellers  

E-Print Network [OSTI]

to be incompressible. As such, these methods are applicable to pumps, fans and hydraulic turbines. Furthermore details can lead to large changes in performance, like resulting head, efficiency and cavitation

Twente, Universiteit

68

Center for Inverse Design Highlight: Iron Chalcogenide PV Absorbers  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhite LightPracticalIron

69

Center for Inverse Design: EFRC Researchers in Focus (Text Version)  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhite

70

Center for Inverse Design: Lost SharePoint Password?  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhiteLost SharePoint

71

Center for Inverse Design: Principal Investigators in the Center for  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN

72

Center for Inverse Design: Research Thrusts and Subtasks  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CENResearch Thrusts and

73

Center for Inverse Design: Modality 3 - Discovery of Missing Materials  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation Sites ProposedOccupationalObjectives Current Future New3: Discovery of

74

Center for Inverse Design poster for EFRC Summit, May 2011  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASL Symposium:and TechnicalTheory and

75

Center for Inverse Design: EFRC Researchers in Focus  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASL Symposium:and TechnicalTheory and OrganizationEFRC

76

Three-dimensional induced polarization data inversion for complex resistivity  

SciTech Connect (OSTI)

The conductive and capacitive material properties of the subsurface can be quantified through the frequency-dependent complex resistivity. However, the routine three-dimensional (3D) interpretation of voluminous induced polarization (IP) data sets still poses a challenge due to large computational demands and solution nonuniqueness. We have developed a flexible methodology for 3D (spectral) IP data inversion. Our inversion algorithm is adapted from a frequency-domain electromagnetic (EM) inversion method primarily developed for large-scale hydrocarbon and geothermal energy exploration purposes. The method has proven to be efficient by implementing the nonlinear conjugate gradient method with hierarchical parallelism and by using an optimal finite-difference forward modeling mesh design scheme. The method allows for a large range of survey scales, providing a tool for both exploration and environmental applications. We experimented with an image focusing technique to improve the poor depth resolution of surface data sets with small survey spreads. The algorithm's underlying forward modeling operator properly accounts for EM coupling effects; thus, traditionally used EM coupling correction procedures are not needed. The methodology was applied to both synthetic and field data. We tested the benefit of directly inverting EM coupling contaminated data using a synthetic large-scale exploration data set. Afterward, we further tested the monitoring capability of our method by inverting time-lapse data from an environmental remediation experiment near Rifle, Colorado. Similar trends observed in both our solution and another 2D inversion were in accordance with previous findings about the IP effects due to subsurface microbial activity.

Commer, M.; Newman, G.A.; Williams, K.H.; Hubbard, S.S.

2011-03-15T23:59:59.000Z

77

Self-Inverse Interleavers for Turbo Codes  

E-Print Network [OSTI]

In this work we introduce and study a set of new interleavers based on permutation polynomials and functions with known inverses over a finite field $\\mathbb{F}_q$ for using in turbo code structures. We use Monomial, Dickson, M\\"{o}bius and R\\'edei functions in order to get new interleavers. In addition we employ Skolem sequences in order to find new interleavers with known cycle structure. As a byproduct we give an exact formula for the inverse of every R\\'edei function. The cycle structure of R\\'edei functions are also investigated. Finally, self-inverse versions of permutation functions are used to construct interleavers. These interleavers are their own de-interleavers and are useful for turbo coding and turbo decoding. Experiments carried out for self-inverse interleavers constructed using these kind of permutation polynomials and functions show excellent agreement with our theoretical results.

Sakzad, Amin; Panario, Daniel; Eshghi, Nasim

2010-01-01T23:59:59.000Z

78

A fluorophosphate-based inverse Keggin structure  

SciTech Connect (OSTI)

An unusual PFO(3)(2-)-templated "inverse Keggin" polyanion, [Mo(12)O(46)(PF)(4)](4-), has been isolated from the degradation reaction of an {Mo(132)}-type Keplerate to [PMo(12)O(40)](3-) by [Cu(MeCN)(4)](PF(6)) in acetonitrile. (31)P-NMR studies suggest a structure-directing role for [Cu(MeCN)(4)](+) in the formation of the highly unusual all-inorganic inverse Keggin structure.

Fielden, John; Quasdorf, Kyle; Cronin, Leroy; Kogerler, Paul

2012-07-17T23:59:59.000Z

79

INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL  

E-Print Network [OSTI]

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

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

80

Inversions in astronomy and the SOLA method  

E-Print Network [OSTI]

This paper was presented at the Institute for Mathematics and its Applications workshop "Inverse problems in wave propagation" and will appear in the series IMA volumes (Springer). A brief overview of applications of inversions within astronomy is presented and also an inventory of techniques commonly in use. Most of this paper is focussed on the method of Subtractive Optimally Localized Averages (SOLA) which is an adaptation of the Backus and Gilbert method. This method was originally developed for use in helioseismology where the Backus and Gilbert method is computationally too slow. Since then it has also been applied to the problem of reverberation mapping of active galactic nuclei and the differences between this inverse problem and the ones of helioseismology are also discussed.

F. P. Pijpers

1995-06-14T23:59:59.000Z

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


81

Population inversion in Landau-quantized graphene  

E-Print Network [OSTI]

Landau level lasers have the advantage of tunability of the laser frequency by means of the external magnetic field. The crucial prerequisite of such a laser is a population inversion between optically coupled Landau levels. Efficient carrier-carrier and carrier-phonon scattering generally suppresses this effect in conventional materials. Based on microscopic calculations, we predict for the first time the occurrence of a long-lived population inversion in Landau-quantized graphene and reveal the underlying many-particle mechanisms. To guide the experimental demonstration, we present optimal conditions for the observation of a maximal population inversion in terms of experimentally accessible parameters, such as the strength of the magnetic field, pump fluence, temperature, and doping. We reveal that in addition to the tunability of the Landau-level laser frequency, also the polarization of the emitted light can be tuned via gate voltage controlling the doping of the sample.

Wendler, Florian

2014-01-01T23:59:59.000Z

82

Focusing Inversion of Electroencephalography and Magnetoencephalography Data  

E-Print Network [OSTI]

or magnetic #12;eld recorded outside of the head. In this paper, we present a new minimization technique to the inverse bioelectric and biomagnetic #12;eld problems are functional brain studies and clinical diagnosis of neural disease, such as epilepsy. In functional brain studies, sensory signals stimulate the subject

Utah, University of

83

Dynamic Behavior of Multiple Inversions Senior Thesis  

E-Print Network [OSTI]

Dynamic Behavior of Multiple Inversions Ilya Baran Senior Thesis Boston University Academy Under functions. To iterate a function means to compose it with itself multiple times. Unless stated otherwise, we a circle centered at O with radius r is a point A 0 on the ray \\Gamma! OA such that OA r = r OA 0 (see

Popovic, Jovan

84

Inverse Modeling for Coastal Seawater Intrusion  

E-Print Network [OSTI]

, USA) #12;INTRODUCTION · Inverse modeling ­ standard tool for groundwater modeling ­ uncommonD3D.1 ­ 2D and 3D finite-element code for simulating variable-density groundwater problems · UCODE 3 and given time (i.e. at one observation location) on one of the parameters in the groundwater model

Politècnica de Catalunya, Universitat

85

3D direct and inverse solvers for eddy current testing of deposits in steam generator  

E-Print Network [OSTI]

We consider the inverse problem of estimating the shape profile of an unknown deposit from a set of eddy current impedance measurements. The measurements are acquired with an axial probe, which is modeled by a set of coils that generate a magnetic field inside the tube. For the direct problem, we validate the method that takes into account the tube support plates, highly conductive part, by a surface impedance condition. For the inverse problem, finite element and shape sensitivity analysis related to the eddy current problem are provided in order to determine the explicit formula of the gradient of a least square misfit functional. A geometrical-parametric shape inversion algorithm based on cylindrical coordinates is designed to improve the robustness and the quality of the reconstruction. Several numerical results are given in the experimental part. Numerical experiments on synthetic deposits, nearby or far away from the tube, with different shapes are considered in the axisymmetric configuration.

Haddar, Houssem

2014-01-01T23:59:59.000Z

86

The inverse problems of wing panel manufacture processes  

SciTech Connect (OSTI)

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.

Oleinikov, A. I., E-mail: a.i.oleinikov@mail.ru [Komsomolsk-on-Amur State Technical University, Lenina prospect 27, Komsomolsk-on-Amur, 681013, Russian Federation, and Institute of Machinery and Metallurgy Far Eastern Branch of the Russian Academy of Sciences, Metallurgov Street 1, Komsomolsk-on-Am (Russian Federation); Bormotin, K. S., E-mail: cvmi@knastu.ru [Komsomolsk-on-Amur State Technical University, Lenina prospect 27, Komsomolsk-on-Amur, 681013, Russian Federation (Russian Federation)

2013-12-16T23:59:59.000Z

87

Forming Analysis of AZ31 Magnesium Alloy Sheets by Means of a Multistep Inverse Approach  

SciTech Connect (OSTI)

This paper applies a multi-step inverse approach to predict the forming of AZ31 magnesium alloy sheets. An in-house finite element code named “INAPH”, which implements the inverse approach formulation by Guo et al. (Int. J. Numer. Methods Eng., 30, 1385-1401), has been used for the forming analysis. This inverse approach uses the deformation theory of plasticity and assumes that the deformation is independent of the loading history. Failure during forming is predicted by a stress-based criterion or a forming limit diagram-based criterion. The INAPH predictions have been compared with experimental results of Takuda et al (Journal of Materials Processing Technology, 89-90:135-140) and incremental analysis using ABAQUS. The multi-step inverse analysis has been shown to very quickly and fairly accurately predict stress, plastic strain, thickness distributions and failure locations on deeply drawn parts made of AZ31 magnesium alloy. The capability of INAPH to predict the formability of magnesium alloys has also been demonstrated at various temperatures. As magnesium alloys possess very limited formability at room temperature, and their formability becomes better at higher temperatures (> 100oC), the inverse analysis constitutes an efficient and valuable tool to predict forming of magnesium alloy parts as a function of temperature. In addition, other processing and design parameters such as the initial dimensions, final desired shape, blank holder forces, and friction can be quickly adjusted to assess the forming feasibility.

Nguyen, Ba Nghiep; Bapanapalli, Satish K.

2009-04-01T23:59:59.000Z

88

Inverse modeling of partitioning interwell tracer tests: A streamline approach  

E-Print Network [OSTI]

computations, inverse modeling 1. Introduction [2] It is recognized that the presence of nonaqueous phaseInverse modeling of partitioning interwell tracer tests: A streamline approach Akhil Datta orders of magnitude. INDEX TERMS: 1832 Hydrology: Groundwater transport; 1829 Hydrology: Groundwater

Datta-Gupta, Akhil

89

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

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

shear attenuation and impedance contrasts. We apply this method to study seismic inverse problems at various scales, from exploration-scale full-waveform inversion to global-scale...

90

E-Print Network 3.0 - attenuated inversion recovery Sample Search...  

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

of a linear inverse problem. A full... values. 12;The Inverse DWT Since the wavelet transform matrix is orthonormal, Hence... the inverse transform is given by: ...

91

E-Print Network 3.0 - anatomy-based inverse planning Sample Search...  

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

in Fully-Discretized Inverse Problems of Summary: of Iterative Prescription Refinement (IPR) for inverse planning in any fully-discretized model of radiation... ), for inverse...

92

Inverse time-of-flight spectrometer for beam plasma research  

SciTech Connect (OSTI)

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.

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)

2014-08-15T23:59:59.000Z

93

LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA  

E-Print Network [OSTI]

LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA MARIT ULVMOEN Department of Mathematical of the study is on lithology-fluid inversion from prestack seismic data in a 3D reservoir. The inversion relates the lithology-fluid classes to elastic variables and the seismic data, and it follows the lines

Eidsvik, Jo

94

Fractal Inverse Problem: Approximation Formulation and Differential Methods  

E-Print Network [OSTI]

Fractal Inverse Problem: Approximation Formulation and Differential Methods ´Eric Gu´erin1 Introduction 1.1 Fractal Inverse Problem The fractal inverse problem is an important research area with a great number of potential application fields. It consists in finding a fractal model or code that generates

Guérin, Eric

95

Aquifer Structure Identification Using Stochastic Inversion  

SciTech Connect (OSTI)

This study presents a stochastic inverse method for aquifer structure identification using sparse geophysical and hydraulic response data. The method is based on updating structure parameters from a transition probability model to iteratively modify the aquifer structure and parameter zonation. The method is extended to the adaptive parameterization of facies hydraulic parameters by including these parameters as optimization variables. The stochastic nature of the statistical structure parameters leads to nonconvex objective functions. A multi-method genetically adaptive evolutionary approach (AMALGAM-SO) was selected to perform the inversion given its search capabilities. Results are obtained as a probabilistic assessment of facies distribution based on indicator cokriging simulation of the optimized structural parameters. The method is illustrated by estimating the structure and facies hydraulic parameters of a synthetic example with a transient hydraulic response.

Harp, Dylan R [Los Alamos National Laboratory; Dai, Zhenxue [Los Alamos National Laboratory; Wolfsberg, Andrew V [Los Alamos National Laboratory; Vrugt, Jasper A [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

96

Equation of state and helioseismic inversions  

E-Print Network [OSTI]

Inversions to determine the squared isothermal sound speed and density within the Sun often use the helium abundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be suppressed. We also show that it is possible to invert for the intrinsic difference in the adiabatic exponent Gamma_1 between two equations of state. When applied to solar data such inversion rules out the EFF equation of state completely, while with existing data it is difficult to distinguish between other equations of state.

Sarbani Basu; J. Christensen-Dalsgaard

1997-02-19T23:59:59.000Z

97

Inverse hydrochemical models of aqueous extracts tests  

SciTech Connect (OSTI)

Aqueous extract test is a laboratory technique commonly used to measure the amount of soluble salts of a soil sample after adding a known mass of distilled water. Measured aqueous extract data have to be re-interpreted in order to infer porewater chemical composition of the sample because porewater chemistry changes significantly due to dilution and chemical reactions which take place during extraction. Here we present an inverse hydrochemical model to estimate porewater chemical composition from measured water content, aqueous extract, and mineralogical data. The model accounts for acid-base, redox, aqueous complexation, mineral dissolution/precipitation, gas dissolution/ex-solution, cation exchange and surface complexation reactions, of which are assumed to take place at local equilibrium. It has been solved with INVERSE-CORE{sup 2D} and been tested with bentonite samples taken from FEBEX (Full-scale Engineered Barrier EXperiment) in situ test. The inverse model reproduces most of the measured aqueous data except bicarbonate and provides an effective, flexible and comprehensive method to estimate porewater chemical composition of clays. Main uncertainties are related to kinetic calcite dissolution and variations in CO2(g) pressure.

Zheng, L.; Samper, J.; Montenegro, L.

2008-10-10T23:59:59.000Z

98

Computationally efficient Bayesian inference for inverse problems.  

SciTech Connect (OSTI)

Bayesian statistics provides a foundation for inference from noisy and incomplete data, a natural mechanism for regularization in the form of prior information, and a quantitative assessment of uncertainty in the inferred results. Inverse problems - representing indirect estimation of model parameters, inputs, or structural components - can be fruitfully cast in this framework. Complex and computationally intensive forward models arising in physical applications, however, can render a Bayesian approach prohibitive. This difficulty is compounded by high-dimensional model spaces, as when the unknown is a spatiotemporal field. We present new algorithmic developments for Bayesian inference in this context, showing strong connections with the forward propagation of uncertainty. In particular, we introduce a stochastic spectral formulation that dramatically accelerates the Bayesian solution of inverse problems via rapid evaluation of a surrogate posterior. We also explore dimensionality reduction for the inference of spatiotemporal fields, using truncated spectral representations of Gaussian process priors. These new approaches are demonstrated on scalar transport problems arising in contaminant source inversion and in the inference of inhomogeneous material or transport properties. We also present a Bayesian framework for parameter estimation in stochastic models, where intrinsic stochasticity may be intermingled with observational noise. Evaluation of a likelihood function may not be analytically tractable in these cases, and thus several alternative Markov chain Monte Carlo (MCMC) schemes, operating on the product space of the observations and the parameters, are introduced.

Marzouk, Youssef M.; Najm, Habib N.; Rahn, Larry A.

2007-10-01T23:59:59.000Z

99

The inverse hexagonal ? inverse ribbon ? lamellar gel phase transition sequence in low hydration DOPC:DOPE phospholipid mixtures  

SciTech Connect (OSTI)

The inverse hexagonal to inverse ribbon phase transition in a mixed phosphatidylcholine-phosphatidylethanolamine system at low hydration is studied using small and wide angle X-ray scattering. It is found that the structural parameters of the inverse hexagonal phase are independent of temperature. By contrast the length of each ribbon of the inverse ribbon phase increases continuously with decreasing temperature over a range of 50 C. At low temperatures the inverse ribbon phase is observed to have a transition to a gel lamellar phase, with no intermediate fluid lamellar phase. This phase transition is confirmed by differential scanning calorimetry.

Kent, B.; Garvey, C.J.; Cookson, D.; Bryant, G.; (Aust.Synch.); (ANSTO); (RMIT)

2009-01-05T23:59:59.000Z

100

Use of the Inverse Approach for the Manufacture and Decoration of Food Cans  

SciTech Connect (OSTI)

Innovation is a key objective in the metal packaging industry in order to produce new concepts, designs, shapes and printing. Simulation technology now allows both the can design as well as the manufacturing process to be carefully analysed before any physical prototypes or dies have been manufactured. These simulations are traditionally carried out using incremental simulation methodologies. However, much information may also be attained by using the inverse approach: the initial blank format for the can body as well as its lid may be optimised much faster, the actual decoration of the can may be evaluated and even calculated when deformation printing techniques are utilised. This paper presents some of the technical details relating to the inverse approach employed in Stampack to carry out simulations important for the manufacture of food cans that are shown via industrial.

Duffett, G.A.; Forgas, A.; Neamtu, L. [Quantech ATZ, Barcelona (Spain); Naceur, H.; Batoz, J.L.; Guo, Y.Q. [Divergent Consultants, Centre de Transfert, Compiegne (France)

2005-08-05T23:59:59.000Z

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


101

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

E-Print Network [OSTI]

of state-of-the-art photovoltaic cells,” Progress ineffective way. Photovoltaic cells are the most promisingthe absorptivity of photovoltaic cell: the material absorp-

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

102

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

E-Print Network [OSTI]

efficiency tables (Version 39),” Progress in Photovoltaics:efficiency tables (Version 36),” Progress in Photovoltaics:efficiency tables (Version 31),” Progress in Photovoltaics:

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

103

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

E-Print Network [OSTI]

Niels Bohr The power output of a solar cell is given by itssolar cell is determined entirely by those two factors. However, the power output

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

104

Center for Inverse Design: Modality 2 - Design of Materials with Targeted  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation Sites ProposedOccupationalObjectives Current Future New

105

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

E-Print Network [OSTI]

the levelized cost of energy of photovoltaic systems,”an efficient and cost-effective way. Photovoltaic cells are

Miller, Owen Dennis

2012-01-01T23:59:59.000Z

106

Probing sequence-structure relationships in proteins: Application of simple energy functions to the inverse folding problem  

E-Print Network [OSTI]

A brief description of the protein-folding and inverse-folding problems is provided. Design of energy are applied to estimate the sequence capacity of all known protein folds, and to compute the evolutionary for recognition of protein folds, and conclude with an application to protein evolution, studying the sequence

Elber, Ron

107

7. Twisted_inverse_image.pdf - Department of Mathematics, Purdue ...  

E-Print Network [OSTI]

Feb 20, 2009 ... Suresh Nayak extended Nagata's theorem, and hence the twisted inverse image, to essentially finite-type separated maps [arXiv:0809.1201].

2009-02-22T23:59:59.000Z

108

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

Open Energy Info (EERE)

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 profiles,...

109

Shape Reconstruction of Inverse Medium Scattering for the ...  

E-Print Network [OSTI]

The well-posedness of the direct scattering is proved, and important energy. 2 ..... It is essential for the success and efficiency of the inverse obstacle scattering to ...

2011-11-03T23:59:59.000Z

110

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

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

Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems Michael Batzle, PI Colorado School of Mines Track Name: Fluid...

111

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...

112

Three-Dimensional Inversion of Magnetotelluric Data on a PC,...  

Open Energy Info (EERE)

Coso Geothermal Field Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Three-Dimensional Inversion of Magnetotelluric Data on a PC,...

113

Potential inversion with subbarrier fusion data revisited  

E-Print Network [OSTI]

We invert experimental data for heavy-ion fusion reactions at energies well below the Coulomb barrier in order to directly determine the internucleus potential between the colliding nuclei. In contrast to the previous applications of the inversion formula, we explicitly take into account the effect of channel couplings on fusion reactions, by assuming that fusion cross sections at deep subbarrier energies are governed by the lowest barrier in the barrier distribution. We apply this procedure to the $^{16}$O +$^{144}$Sm and $^{16}$O +$^{208}$Pb reactions, and find that the inverted internucleus potential are much thicker than phenomenological potentials. A relation to the steep fall-off phenomenon of fusion cross sections recently found at deep subbarrier energies is also discussed.

K. Hagino; Y. Watanabe

2007-06-18T23:59:59.000Z

114

Supersymmetric inversion of effective-range expansions  

E-Print Network [OSTI]

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.

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

2015-01-16T23:59:59.000Z

115

Supersymmetric inversion of effective-range expansions  

E-Print Network [OSTI]

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.

Midya, Bikashkali; Abramowicz, Sylvain; Suárez, O L Ramírez; Sparenberg, Jean-Marc

2015-01-01T23:59:59.000Z

116

Inverse Vernier Effects in Coupled Lasers  

E-Print Network [OSTI]

In this report we study the Vernier effect in coupled laser systems consisting of two cavities. We show that depending on the nature of their coupling, not only can the "supermodes" formed at the overlapping resonances of the coupled cavities have the lowest thresholds and lase first as previously suggested, leading to a manifestation of the typical Vernier effect now in an active system; these supermodes can also have increased thresholds and are hence suppressed, which can be viewed as an inverse Vernier effect. We attribute this effect to detuning-dependent Q-spoiling, and it can lead to an increased free spectrum range and possibly single-mode lasing, which may explain the experimental findings of several previous work. We illustrate this effect using two coupled micro-ring cavities and a micro-ring cavity coupled to a slab cavity, and we discuss its relation to the existence of exceptional points in coupled lasers.

Ge, Li

2015-01-01T23:59:59.000Z

117

Our On-Its-Head-and-In-Your-Dreams Approach Leads to Clean Energy  

SciTech Connect (OSTI)

Representing the Center for Inverse Design (CID), this document is one of the entries in the Ten Hundred and One Word Challenge. As part of the challenge, the 46 Energy Frontier Research Centers were invited to represent their science in images, cartoons, photos, words and original paintings, but any descriptions or words could only use the 1000 most commonly used words in the English language, with the addition of one word important to each of the EFRCs and the mission of DOE: energy. The mission of the CID is to revolutionize the discovery of new materials by design with tailored properties through the development and application of a novel inverse design approach powered by theory guiding experiment with an initial focus on solar energy conversion.

Kazmerski, Lawrence; Gwinner, Don; Hicks, Al

2013-07-18T23:59:59.000Z

118

Estimation of Parigi reservoir characteristics using seismic attributes, AVO analysis and AVO inversion, and seismic inversion  

SciTech Connect (OSTI)

In the carbonate reservoir, the gas was trapped in the cavity of the formation. First of all, to identify the cavity as the distribution of the cavity or porous zone will be done by reflection strength and instantaneous frequency from the seismic attribute analysis. After the zone has been identified, the existing gas and the value of porosity can be estimated using AVO analysis and AVO inversion technique. This idea was applied to the carbonate reservoir within the Parigi Formation in the Northwest Java Basin (Indonesia) by Santoso et al. The result shows a clear zone of high reflection strength and low instantaneous frequency in the carbonate build up. The porosity estimated by AVO inversion gives a value of the porosity about 38% and the Poisson`s ratio around 0.22-0.26. This paper is continuation of Santoso et al. study. It is done by the delineation of the porosity which can be displayed by the acoustic impedance section as a result of seismic inversion process. The delineation of the reservoir characters to the horizontal direction as previous study gives around a similar value as shown by acoustic impedance value. When these results were compared to the borehole data in the location, they are very close. Therefore this idea has given a satisfactory result in estimating porosity from seismic data and delineating the carbonate reservoir away from the borehole.

Santoso, D.; Hendrajaya, L.; Watkins, J.S. [and others

1995-12-31T23:59:59.000Z

119

Inverse Modelling in Geology by Interactive Evolutionary Computation  

E-Print Network [OSTI]

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

Boschetti, Fabio

120

Inversion of the Pieri formula for Macdonald polynomials  

E-Print Network [OSTI]

Inversion of the Pieri formula for Macdonald polynomials Michel Lassalle Centre National de la://www.mat.univie.ac.at/~schlosse February 8, 2004 Abstract We give the explicit analytic development of Macdonald polynomials in terms and phrases: Macdonald polynomials, Pieri formula, matrix inversion, symmetric functions, Schur functions

Schlosser, Michael

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


121

Program Inversion for Tail Recursive Functions Naoki Nishida1  

E-Print Network [OSTI]

inputs, say vi1 , . . . , vim , the partial inverse computation computes the remaining inputs vj1 , . . . , vjk such that f(v1, . . . , vn) = v with {vi1 , . . . , vim }{vj1 , . . . , vjk } = {v1, . . . , vn} and {vi1 , . . . , vim } {vj1 , . . . , vjk } = . Two approaches to inverse computation are distinguished

Vidal, Germán

122

Anomalous Phase Inversion in Polymer Blends Prepared by Cryogenic Mechanical  

E-Print Network [OSTI]

, as well as interpenetrating and bicontinu- ous networks.7,8 Phase inversion occurs when the mi- norityAnomalous Phase Inversion in Polymer Blends Prepared by Cryogenic Mechanical Alloying Archie P strategies for producing highly dis- persed multicomponent polymer blends. By their very nature

123

A new sliced inverse regression method for multivariate response regression  

E-Print Network [OSTI]

inverse regression. 1 Introduction In analyzing large datasets, multivariate response regression analysis) which is a well-known method to estimate the EDR space. The link function can be estimatedA new sliced inverse regression method for multivariate response regression Rapha¨el Coudret1, St

Paris-Sud XI, Université de

124

TOPOLOGICAL DERIVATIVE FOR THE INVERSE SCATTERING OF ELASTIC WAVES  

E-Print Network [OSTI]

TOPOLOGICAL DERIVATIVE FOR THE INVERSE SCATTERING OF ELASTIC WAVES by B. B. GUZINA (Department December 2002. Revise 20 May 2003] Summary To establish an alternative analytical framework for the elastic-wave. For a comprehensive solution to three-dimensional inverse scattering problems involving elastic waves, the proposed

Guzina, Bojan

125

Lithology-Fluid Inversion based on Prestack Seismic Data  

E-Print Network [OSTI]

Lithology-Fluid Inversion based on Prestack Seismic Data Marit Ulvmoen Summary The focus of the study is on lithology-fluid inversion from prestack seismic data. The target zone is a 3D reservoir model. The likelihood model relates the lithology-fluid classes to elastic variables and the seismic

Eidsvik, Jo

126

Optical Aharonov-Bohm effect: an inverse hyperbolic problems approach  

E-Print Network [OSTI]

We describe the general setting for the optical Aharonov-Bohm effect based on the inverse problem of the identification of the coefficients of the governing hyperbolic equation by the boundary measurements. We interpret the inverse problem result as a possibility in principle to detect the optical Aharonov-Bohm effect by the boundary measurements.

Gregory Eskin

2007-10-18T23:59:59.000Z

127

Constrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor  

E-Print Network [OSTI]

Inverse Volume Rendering I.4.m [Image Processing and Computer Vision]: Miscellaneous--Volumetric Modeling that we are observing 2D projections of 3D volumes of glowing gas, the actual spatial struc- ture of PNeConstrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor MPI Informatik, Germany

Utah, University of

128

Computationally Efficient Regularized Inversion for Highly Parameterized MODFLOW Models  

E-Print Network [OSTI]

. INTRODUCTION The inverse problem in groundwater modeling is generally ill-posed and non-unique. The typical geological heterogeneity has not been possible in common groundwater modeling practice. The principal reasons-Marquardt methods, and (3) lack of experience within the groundwater modeling community with regularized inversion

Barrash, Warren

129

Finite Element Discretization Strategies for the Inverse Electrocardiographic (ECG) Problem  

E-Print Network [OSTI]

Finite Element Discretization Strategies for the Inverse Electrocardiographic (ECG) Problem Dafang electrocardiographic (ECG) problems re- quires the ability to both quantify and minimize approxi- mation errors specifically for the inverse ECG prob- lem. By quantitatively analyzing the connection between the ill

Utah, University of

130

Membrane filtration studies of inversely soluble model metalworking fluids  

SciTech Connect (OSTI)

Model metalworking fluids, characterized by phase separation of functional components at elevated temperatures, were studied. Results of membrane filtration experiments with three oils of differing chemical nature confirm the feasibility of specific removal of finely dispersed contaminant oils without the simultaneous loss of active components from adequately formulated fluids. Prerequisites are that membrane materials and pore sizes be suitably chosen and that operating temperatures be kept below the cloud point of the least soluble component. The most suitable filter in the present study was a hydrophilic regenerated cellulose membrane with a NMWL of 100,000 dalton. Complete oil removal was attained if membrane pore sizes did not exceed 0.1 {micro}m. It was also found that intrinsically water-soluble boundary lubricants of the polyglycol ether type are retained by membranes in the presence of PPG-1800, which serves as a precipitation promoter above the cloud point. This is of considerable practical importance since it offers the possibility of designing water-soluble boundary lubrication and extreme pressure additives which are activated by the presence of an inversely soluble component above its cloud point. The latter compound also acts as the principal hydrodynamic lubricant of the present model formulations. The usefulness of a new analytical tool for the rapid acquisition and imaging of data pertinent to changes in molecular aggregation and phase conditions was demonstrated.

Misra, S.K.; Skoeld, R.O. [Chalmers Univ. of Technology, Gothenburg (Sweden)] [Chalmers Univ. of Technology, Gothenburg (Sweden)

1999-01-01T23:59:59.000Z

131

Sunspot umbra atmosphere from full Stokes inversion  

E-Print Network [OSTI]

Sunspots are prominent manifestations of the solar cycle and provide key constraints for understanding its operation. Also, knowing internal structure of sunspots allows us to gain insights on the energy transport in strong magnetic fields and, thus, on the processes inside the convection zone, where solar magnetic fields are generated and amplified before emerging at the surface on various scales, even during solar minima. In this paper, we present results of a spectropolarimetric analysis of a sunspot observed during the declining phase of the solar cycle 23. By inversion of full Stokes spectra observed in several spectral regions in the optical at the THEMIS facility we infer the height dependence of physical quantities such as the temperature and the magnetic field strength for different sunspot regions. The simultaneous use of atomic (Fe{\\sc i} 5250.2 and 5250.6 \\AA) and highly temperature sensitive molecular (TiO 7055 \\AA and MgH 5200 \\AA) lines allow us to improve a model of the sunspot umbra.

Wenzel, R; Fluri, D M; Arnaud, J; Sainz-Dalda, A

2010-01-01T23:59:59.000Z

132

The relativistic inverse stellar structure problem  

SciTech Connect (OSTI)

The observable macroscopic properties of relativistic stars (whose equations of state are known) can be predicted by solving the stellar structure equations that follow from Einstein’s equation. For neutron stars, however, our knowledge of the equation of state is poor, so the direct stellar structure problem can not be solved without modeling the highest density part of the equation of state in some way. This talk will describe recent work on developing a model independent approach to determining the high-density neutron-star equation of state by solving an inverse stellar structure problem. This method uses the fact that Einstein’s equation provides a deterministic relationship between the equation of state and the macroscopic observables of the stars which are composed of that material. This talk illustrates how this method will be able to determine the high-density part of the neutron-star equation of state with few percent accuracy when high quality measurements of the masses and radii of just two or three neutron stars become available. This talk will also show that this method can be used with measurements of other macroscopic observables, like the masses and tidal deformabilities, which can (in principle) be measured by gravitational wave observations of binary neutron-star mergers.

Lindblom, Lee [Theoretical Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States)

2014-01-14T23:59:59.000Z

133

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

E-Print Network [OSTI]

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 ...

van der Hilst, Robert D.

134

Conceptual aircraft dynamics from inverse aircraft modeling  

E-Print Network [OSTI]

This thesis presents a method of construe' ting a nonlinear dynamics model of a theoretical aircraft from the nonlinear batch simulation of an existing aircrew This method provides control law designers with a method of fabricating nonlinear models...

Ziegler, Gregory E

1999-01-01T23:59:59.000Z

135

Microsoft PowerPoint - High Gradient Inverse Free Electron Laser...  

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

Hi h G di t Hi h i High Gradient High energy gain Inverse Free Electron Laser at BNL P. Musumeci UCLA Department of Physics and Astronomy ATF user meeting April 2-3 2009 Outline...

136

Inverse transport calculations in optical imaging with subspace optimization algorithms  

E-Print Network [OSTI]

Kui Ren April 16, 2014 Abstract Inverse boundary value problems for the radiative transport equation transport problems, radiative transport equation, subspace optimization method, singular value decomposition physical parameters in the radiative transport equation from partial information on the solution

Ren, Kui

137

LINEARIZING NON-LINEAR INVERSE PROBLEMS AND AN ...  

E-Print Network [OSTI]

to show uniqueness and Hölder stability for the inverse backscattering ...... that if we replace uT by u on the r.h.s. above, we get the “distorted harmonic wave”.

138

Modeling and inversion of self-potential data  

E-Print Network [OSTI]

This dissertation presents data processing techniques relevant to the acquisition, modeling, and inversion of self-potential data. The primary goal is to facilitate the interpretation of self-potentials in terms of the ...

Minsley, Burke J

2007-01-01T23:59:59.000Z

139

Forward and inverse metabolic engineering strategies for improving polyhydroxybyrate production  

E-Print Network [OSTI]

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 ...

Tyo, Keith E. J

2008-01-01T23:59:59.000Z

140

The Focused Inverse Method for Linear Logic Kaustuv Chaudhuri  

E-Print Network [OSTI]

The Focused Inverse Method for Linear Logic Kaustuv Chaudhuri CMU-CS-06-162 December 4, 2006 Mellon University, or any other entity. Copyright c 2006 Kaustuv Chaudhuri #12;Abstract Linear logic

Chaudhuri, Kaustuv

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


141

Electromagnetic Inverse Problems Involving Distributions of Dielectric Mechanisms and Parameters  

E-Print Network [OSTI]

Electromagnetic Inverse Problems Involving Distributions of Dielectric Mechanisms and Parameters H University, Raleigh, NC 27695-8205 August 17, 2005 Abstract We consider electromagnetic interrogation, uniform, log-normal, and log-Bi-Gaussian distributions. Keywords: Electromagnetic interrogation

142

Engineering the initial state in broadband population inversion  

E-Print Network [OSTI]

Quantum systems with sublevel structures prevent full population inversion from one manifold of sublevels to the other using strong ultrafast resonant pulses. In this work we explain the mechanism by which this population transfer is blocked. We then develop a novel concept of geometric control, assuming full or partial coherent manipulation within the manifolds and show that by preparing specific coherent superpositions in the initial manifold, full population inversion or full population blockade, {\\it i.e} laser-induced transparency, can be achieved. In particular, by parallel population transfer we show how population inversion between the manifolds can be obtained with minimal pulse area. As the number of sublevels increases, population inversion can overcome the pulse area theorem at the expense of full control over the initial manifold of sublevels.

Bo Y. Chang; Sheokmin Shin; Ignacio R. Sola

2015-03-03T23:59:59.000Z

143

Mesh Puppetry: Cascading Optimization of Mesh Deformation with Inverse Kinematics  

E-Print Network [OSTI]

approach builds upon traditional rigging by optimizing skeleton position and vertex weights. Keywords: Mesh deformation, nonlinear optimization, inverse kinematics, geometry processing. 1 Introduction. To allow for more global and complex deforma- tion, many authors proposed to cast mesh deformation

Desbrun, Mathieu

144

Inverse Optimization: An Application to the Capacitated Plant Location Problem  

E-Print Network [OSTI]

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 ...

Bitran, Gabriel R.

145

Computational Inversion of Electron Tomography Images -Gradient Flows  

E-Print Network [OSTI]

Computational Inversion of Electron Tomography Images Using L2 -Gradient Flows Guoliang Xu 1) Ming Computing Institute of Computational Mathematics, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100190, China 2) Department of Computer Sciences and Institute

Texas at Austin, University of

146

Tests of the Gravitational Inverse-Square Law  

E-Print Network [OSTI]

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.

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

2003-07-22T23:59:59.000Z

147

Inverse scattering by a continuation method with initial guesses from ...  

E-Print Network [OSTI]

Sep 5, 2007 ... b Department of Mathematics and Statistics, Louisiana Tech University, ... The present paper focuses on the inverse scattering problem. ..... Example 1: (a) the true scatterer; (b) the initial guess; and (c) the final reconstruction.

2007-10-11T23:59:59.000Z

148

Advances in Inverse Transport Methods and Applications to Neutron Tomography  

E-Print Network [OSTI]

The purpose of the inverse-transport problems that we address is to reconstruct the material distribution inside an unknown object undergoing a nondestructive evaluation. We assume that the object is subjected to incident beams of photons...

Wu, Zeyun

2011-02-22T23:59:59.000Z

149

Maps and inverse maps in open quantum dynamics  

E-Print Network [OSTI]

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.

Thomas F. Jordan

2008-07-08T23:59:59.000Z

150

Maps and inverse maps in open quantum dynamics  

SciTech Connect (OSTI)

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 cannot have an inverse that is obtained from any dynamics described by any unitary operator for any states of a larger system.

Jordan, Thomas F., E-mail: tjordan@d.umn.ed [Physics Department, University of Minnesota, Duluth, MN 55812 (United States)

2010-10-15T23:59:59.000Z

151

Image Appraisal for 2D and 3D Electromagnetic Inversion  

SciTech Connect (OSTI)

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.

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

1999-01-28T23:59:59.000Z

152

Temperature inversion in long-range interacting systems  

E-Print Network [OSTI]

Temperature inversions occur in nature, e.g., in the solar corona and in interstellar molecular clouds: somewhat counterintuitively, denser parts of the system are colder than dilute ones. We propose a simple and appealing mechanism to spontaneously generate temperature inversions in systems with long-range interactions, by preparing them in inhomogeneous thermal equilibrium states and then applying an impulsive perturbation. In similar situations, short-range systems would typically relax to another thermal equilibrium, with uniform temperature profile. By contrast, in long-range systems, the interplay between wave-particle interaction and spatial inhomogeneity drives the system to nonequilibrium stationary states that generically exhibit temperature inversion. Our work underlines the crucial role the range of interparticle interaction plays in determining the nature of steady states attained when macroscopic systems are brought out of thermal equilibrium.

Teles, Tarcisio N; Casetti, Lapo

2015-01-01T23:59:59.000Z

153

Observation of the Inverse Cotton-Mouton Effect  

E-Print Network [OSTI]

We report the investigation of the Inverse Cotton-Mouton Effect (ICME) i.e. the magnetization induced in a medium by light propagating in the presence of a transverse magnetic field. We present a detailed study of the ICME in a TGG crystal showing the dependence of the measured effect on the laser power density and polarization, and on the static external magnetic field. We finally derive a relation between the Cotton-Mouton and Inverse Cotton-Mouton effects which is experimentally confirmed.

Baranga, Andrei Ben-Amar; Fouché, Mathilde; Rizzo, Carlo; Rikken, G L J A

2010-01-01T23:59:59.000Z

154

On the computational complexity of sequence design problems  

SciTech Connect (OSTI)

Inverse protein folding concerns the identification of an amino acid sequence that folds to a given structure. Sequence design problems attempt to avoid the apparent difficulty of inverse protein folding by defining an energy that can be minimized to find protein-like sequences. The authors evaluate the practical relevance of two sequence design problems by analyzing their computation complexity. They show that the canonical method of sequence design is intractable, and describe approximation algorithms for this problem. The authors also describe an efficient algorithm that exactly solves the grand canonical method. The analysis shows how sequence design problems can fail to reduce the difficulty of the inverse protein folding problem, and highlights the need to analyze these problems to evaluate their practical relevance.

Hart, W.E. [Sandia National Labs., Albuquerque, NM (United States). Algorithms and Discrete Mathematics Dept.

1996-12-31T23:59:59.000Z

155

On the computational complexity of sequence design problems  

SciTech Connect (OSTI)

Inverse protein folding concerns the identification of an amino acid sequence that folds to a given structure. Sequence design problems attempt to avoid the apparant difficulty of inverse protein folding by defining an energy that can be minimized to find protein-like sequences. We evaluate the practical relevance of two sequence design problems by analyzing their computational complexity. We show that the canonical method of sequence design is intractable and describe approximation algorithms for this problem. We also describe an efficient algorithm that exactly solves the grand canonical method. Our analysis shows how sequence design problems can fail to reduce the difficulty of the inverse protein folding problem and highlights the need to analyze these problems to evaluate their practical relevance. 10 refs., 8 figs.

Hart, W.E. [Sandia National Labs., Albuquerque, NM (United States)

1997-12-01T23:59:59.000Z

156

Feasibility of a fast inverse dose optimization algorithm for IMRT via matrix inversion without negative beamlet intensities  

SciTech Connect (OSTI)

A fast optimization algorithm is very important for inverse planning of intensity modulated radiation therapy (IMRT), and for adaptive radiotherapy of the future. Conventional numerical search algorithms such as the conjugate gradient search, with positive beam weight constraints, generally require numerous iterations and may produce suboptimal dose results due to trapping in local minima. A direct solution of the inverse problem using conventional quadratic objective functions without positive beam constraints is more efficient but will result in unrealistic negative beam weights. We present here a direct solution of the inverse problem that does not yield unphysical negative beam weights. The objective function for the optimization of a large number of beamlets is reformulated such that the optimization problem is reduced to a linear set of equations. The optimal set of intensities is found through a matrix inversion, and negative beamlet intensities are avoided without the need for externally imposed ad-hoc constraints. The method has been demonstrated with a test phantom and a few clinical radiotherapy cases, using primary dose calculations. We achieve highly conformal primary dose distributions with very rapid optimization times. Typical optimization times for a single anatomical slice (two dimensional) (head and neck) using a LAPACK matrix inversion routine in a single processor desktop computer, are: 0.03 s for 500 beamlets; 0.28 s for 1000 beamlets; 3.1 s for 2000 beamlets; and 12 s for 3000 beamlets. Clinical implementation will require the additional time of a one-time precomputation of scattered radiation for all beamlets, but will not impact the optimization speed. In conclusion, the new method provides a fast and robust technique to find a global minimum that yields excellent results for the inverse planning of IMRT.

Goldman, S.P.; Chen, J.Z.; Battista, J.J. [Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7 (Canada); Department of Medical Biophysics and Department of Oncology, University of Western Ontario and London Regional Cancer Program, London Health Sciences Centre, London, Ontario N6A 4L6 (Canada)

2005-09-15T23:59:59.000Z

157

Design for manufacturability Design verification  

E-Print Network [OSTI]

ITRS Design #12;Design · Design for manufacturability · Design verification #12;Design for Manufacturability · Architecture challenges · Logic and circuit challenges · Layout and physical design challenges · Expected to be the source of multiple DFM challenges · Invest in variability reduction or design

Patel, Chintan

158

APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD  

E-Print Network [OSTI]

APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD ON A VECTOR COMPUTER Michele definite matrix, by the preconditioned conjugate gradient method (PCG) (see, e.g., [4]). It is well of the conjugate gradient method reduces to computing a matrix­ vector product with G, an operation which offers

Tůma, Miroslav

159

Inverse Scattering and Acousto-Optic Imaging Guillaume Bal  

E-Print Network [OSTI]

Inverse Scattering and Acousto-Optic Imaging Guillaume Bal Department of Applied Physics the optical properties of a highly-scattering medium from incoherent acousto-optic measurements. The method of interior control of boundary measurements by an external wave field. 1 #12;The acousto-optic effect

Bal, Guillaume

160

Nonlinear Adaptive Dynamic Inversion Applied to a Generic Hypersonic Vehicle  

E-Print Network [OSTI]

Nonlinear Adaptive Dynamic Inversion Applied to a Generic Hypersonic Vehicle Elizabeth Rollins Conclusions Extensions 3 / 50 #12;Motivation Control of Hypersonic Vehicles · Wide range of flight conditions in hypersonic flight · Three main causes of inlet unstarts: 1 A flow to the inlet that is slower than

Valasek, John

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


161

Nonlinear Adaptive Dynamic Inversion Applied to a Generic Hypersonic Vehicle  

E-Print Network [OSTI]

Nonlinear Adaptive Dynamic Inversion Applied to a Generic Hypersonic Vehicle Elizabeth Rollins of hypersonic vehicles is challenging because of the wide range of oper- ating conditions encountered and certain aspects unique to high speed flight. A particular safety concern in hypersonic flight is the risk

Valasek, John

162

Ocean effect correction in global inversion of geomagnetic  

E-Print Network [OSTI]

data: dcorr = dobs ­ ( F(mi) ­ F'(mi) ) ·invert corrected data: mi+1 = F'-1 (dcorr ) ·repeat until |mi+1 - mi | mi+1 ­ mi = F'-1 ( dobs ­ F(mi) ) ·then if mi+1 ­ mi 0, also mi F-1 (dobs ) Inverse problem with an approximate forward operator #12

Cerveny, Vlastislav

163

Assessing streamaquifer interactions through inverse modeling of flow routing q  

E-Print Network [OSTI]

Assessing stream­aquifer interactions through inverse modeling of flow routing q Jozsef Szilagyi a and Nieber, 1977; Troch et al., 1993; Brutsaert and Lopez, 1998; Szilagyi et al., 1998; Par- lange et al., 2001; Szilagyi, 2003a). Knowledge of this inter- action between streamflow and groundwater during flood

Szilagyi, Jozsef

164

Inversion of Scattered Waves for Material Properties in Fractured Rock  

SciTech Connect (OSTI)

The authors apply a recently developed low-frequency, non-linear inversion method which includes near and far field terms to a crosshole data set to determine the bulk and shear modulus, as well as the density for a fractured zone in a granitic rock mass. The method uses the scattered elastic wavefield which is extracted from the recorded data before the inversion is performed. The inversion result is appraised by investigating the resolution and standard deviation of the model estimates. The sensitivity of the three parameters to different features of the medium is revealed. While the bulk modulus appears to be sensitive to voids and welded contacts, the density is mostly affected by fractured zones. The shear modulus is least constrained due to the absence of S wave anisotropy information. It is shown that the three medium parameters are generally sensitive to other medium features than those determined by velocity inversions. Thus this method is viewed as a complimentary approach to travel time tomography which provides more insight into the material properties of inhomogeneous media.

Gritto, Roland; Korneev, Valeri A.; Johnson, Lane R.

1999-07-01T23:59:59.000Z

165

The Inverse Kinetics Method and PID Compensation of the  

E-Print Network [OSTI]

The Inverse Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas ABSTRACT Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas B.S. General

166

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 for Gravity, Electrical & Magnetic Studies Colorado School of Mines Department of Geophysics Colorado School of gravity data for salt imaging Richard A. Krahenbuhl Center for Gravity, Electrical & Magnetic Studies

167

Refactoring Composite to Visitor and Inverse Transformation in Java  

E-Print Network [OSTI]

Refactoring Composite to Visitor and Inverse Transformation in Java Akram Ajouli1 & Julien Cohen2 1, EMN) We describe how to use refactoring tools to transform a Java program conforming to the Composite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 CompositeVisitor Transformation Scheme 7 3.1 CompositeVisitor Transformation

Paris-Sud XI, Université de

168

Refactoring Composite to Visitor and Inverse Transformation in Java  

E-Print Network [OSTI]

Refactoring Composite to Visitor and Inverse Transformation in Java Akram Ajouli1 & Julien Cohen2 1, EMN) We describe how to use refactoring tools to transform a Java program conforming to the Composite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 CompositeVisitor Transformation Scheme 7 3.1 CompositeVisitor Transformation

Paris-Sud XI, Université de

169

HYBRID INVERSE PROBLEMS AND REDUNDANT SYSTEMS OF PARTIAL DIFFERENTIAL EQUATIONS  

E-Print Network [OSTI]

. The theory is applied to the case of power density measurements, which are internal functionals of the form from knowledge of said internal functionals. For recent books and reviews on hybrid inverse problems conditions. General theories of elliptic systems then allow us to construct a parametrix for such systems

Bal, Guillaume

170

Inverse diffusion from knowledge of power densities Guillaume Bal  

E-Print Network [OSTI]

asymptotic expansions and (Fourier) transformation, this allow us to construct the power density) provides access to the power density H(x) = (x)|u|2 (x) for all x inside the domain of interestInverse diffusion from knowledge of power densities Guillaume Bal , Eric Bonnetier , Fran

Bal, Guillaume

171

Mesh Puppetry: Cascading Optimization of Mesh Deformation with Inverse Kinematics  

E-Print Network [OSTI]

approach builds upon traditional rigging by optimizing skeleton position and vertex weights. Keywords: Mesh deformation, nonlinear optimization, inverse kinematics, geometry processing. 1 Introduction,mathieu}@caltech.edu Figure 1: Armadillo Olympics: The Armadillo model (top left) can be deformed to take various sport poses

Zhou, Kun

172

Directional Wetting in Anisotropic Inverse Opals Katherine R. Phillips,  

E-Print Network [OSTI]

the nano- to microscale voids. Here, we investigate how liquid wetting in highly ordered inverse opals template of colloidal particles. This highly ordered structure acts as a photonic crystal, strongly or not a given liquid will fill the structure spontaneously upon contact. Using alkylchlorosi- lanes,18 silica

Aizenberg, Joanna

173

Motion Without Correspondence from Tomographic Projections by Bayesian Inversion Theory  

E-Print Network [OSTI]

Computing 3D reconstructions from X-ray projections is al- ready possible in some medical applications by Bayesian formalism as we want to handle either sparsely collected or limited-angle data, which are beyondMotion Without Correspondence from Tomographic Projections by Bayesian Inversion Theory S. S

Brandt, Sami

174

The Laplace Transform 1 Laplace transform and inverse transform  

E-Print Network [OSTI]

The Laplace Transform Name: 1 Laplace transform and inverse transform Definition. Let f(t) be a function defined for t 0. Then the integral L {f(t)} = 0 e-st f(t)dt is said to be the Laplace transform of f provided the integral converges. Fill in the following Laplace transforms. L {tn } = L {eat } = L

Yengulalp, Lynne

175

The Laplace Transform 1 Laplace transform and inverse transform  

E-Print Network [OSTI]

The Laplace Transform Name: 1 Laplace transform and inverse transform Definition. Let f be a function defined for t 0. Then the integral L {f(t)} = 0 e-st f(t)dt is said to be the Laplace transform of f provided the integral converges. Fill in the following Laplace transforms. L {tn } = n! sn+1 L

Yengulalp, Lynne

176

Using Expert Knowledge in Solving the Seismic Inverse Problem ?  

E-Print Network [OSTI]

practical applications, it it important to solve the seismic inverse problem, i.e., to measure seismic exhausted. Even under the best conservation policies, there is (and there will be) a constant need to find that there are resources such as minerals at a certain location is to actually drill a borehole and analyze the materials

Ward, Karen

177

THE INVERSE OF A SEMI-INFINITE SYMMETRIC BANDED MATRIX  

E-Print Network [OSTI]

algorithm 3]. The eigen- values and eigen-vectors for the nite symmetric tridiagonal case were obtainedTHE INVERSE OF A SEMI-INFINITE SYMMETRIC BANDED MATRIX D. A. LAVISy , B. W. SOUTHERNz and I. F a method for obtaining an analytic form for a class of sym- metric semi-in nite banded matrices, which are

Lavis, David

178

Interpreting Helioseismic Structure Inversion Results of Solar Active Regions  

E-Print Network [OSTI]

Helioseismic techniques such as ring-diagram analysis have often been used to determine the subsurface structural differences between solar active and quiet regions. Results obtained by inverting the frequency differences between the regions are usually interpreted as the sound-speed differences between them. These in turn are used as a measure of temperature and magnetic-field strength differences between the two regions. In this paper we first show that the "sound-speed" difference obtained from inversions is actually a combination of sound-speed difference and a magnetic component. Hence, the inversion result is not directly related to the thermal structure. Next, using solar models that include magnetic fields, we develop a formulation to use the inversion results to infer the differences in the magnetic and thermal structures between active and quiet regions. We then apply our technique to existing structure inversion results for different pairs of active and quiet regions. We find that the effect of magnetic fields is strongest in a shallow region above 0.985R_sun and that the strengths of magnetic-field effects at the surface and in the deeper (r < 0.98R_sun) layers are inversely related, i.e., the stronger the surface magnetic field the smaller the magnetic effects in the deeper layers, and vice versa. We also find that the magnetic effects in the deeper layers are the strongest in the quiet regions, consistent with the fact that these are basically regions with weakest magnetic fields at the surface. Because the quiet regions were selected to precede or follow their companion active regions, the results could have implications about the evolution of magnetic fields under active regions.

Chia-Hsien Lin; Sarbani Basu; Linghuai Li

2008-09-08T23:59:59.000Z

179

Inverse Process Analysis for the Acquisition of Thermophysical Data  

SciTech Connect (OSTI)

One of the main barriers in the analysis and design of materials processing and industrial applications is the lack of accurate experimental data on the thermophysical properties of materials. To date, the measurement of most of these high-temperature thermophysical properties has often been plagued by temperature lags that are inherent in measurement techniques. These lags can be accounted for with the appropriate mathematical models, reflecting the experimental apparatus and sample region, in order to deduce the desired measurement as a function of true sample temperature. Differential scanning calorimeter (DSC) measurements are routinely used to determine enthalpies of phase change, phase transition temperatures, glass transition temperatures, and heat capacities. In the aluminum, steel, and metal casting industries, predicting the formation of defects such as shrinkage voids, microporosity, and macrosegregation is limited by the data available on fraction solid and density evolution during solidification. Dilatometer measurements are routinely used to determine the density of a sample at various temperatures. An accurate determination of the thermophysical properties of materials is needed to achieve accuracy in the numerical simulations used to improve or design new material processes. In most of the instruments used to measure properties, the temperature is changed according to instrument controllers and there is a nonhomogeneous temperature distribution within the instrument. Additionally, the sample temperature cannot be measured directly: temperature data are collected from a thermocouple that is placed at a different location than that of the sample, thus introducing a time lag. The goal of this project was to extend the utility, quality and accuracy of two types of commercial instruments -a DSC and a dilatometer - used for thermophysical property measurements in high-temperature environments. In particular, the quantification of solid fraction and density during solidification was deemed of critical importance. To accomplish this project goal, we redesigned sample holders and developed inverse mathematical methods to account for system lags. The desired property could then be correlated to the proper sample temperature. For the NETZSCH DSC 404C instrument with a high-accuracy heat capacity sensor, a mathematical model was developed by assuming that each component was isothermal and that the heat transfer among components occurred by conduction and radiation. Model parameters included effective conduction time constants and radiation time constants. Several model cases were investigated to assess the effect of heat transfer interactions. New features that have not been considered in previous DSC models were included in the present study. These new features included (a) considering the sensor platform, (b) accounting for the heat loss through the stem, and (c) considering the lag between furnace temperature and set point temperature. Comparisons with experimental results showed that temperature lags in heat flux DSC instruments could be determined by performing a heat transfer analysis based on a comprehensive model. The proposed mathematical model yielded accurate results over a wide temperature range during heating and cooling regimes. The induced thermal lag in the Theta Industries dual push-rod horizontal dilatometer is apparent owing to the distance of the thermocouple from the actual sample. In a near steady-state mode of operation, this apparent problem is minimal. However, in a transient situation, where the density is varying as a function of time, the temperature output from the remote temperature sensor must be adjusted in order to reflect the sample temperature. The conventional push-rod dilatometer insert was modified significantly to allow an accurate correlation of the measured density to the predicted sample temperature of alloys in the phase-change regime. This new configuration made use of a standard furnace assembly; however, the specimen was symmetrically encased in a well-instrumented cylind

Jay Frankel (UTK); Adrian Sabau (UTK)

2004-10-31T23:59:59.000Z

180

IOP PUBLISHING INVERSE PROBLEMS Inverse Problems 23 (2007) 14671493 doi:10.1088/0266-5611/23/4/007  

E-Print Network [OSTI]

/1467 Abstract The focus of this study is a 3D inverse scattering problem underlying non- invasive reconstruction of numerical examples is included to demonstrate the feasibility of 3D obstacle reconstruction when the defects for the fast, 3D elastic-wave imaging of piecewise- homogeneous obstacles in a layered (semi

Guzina, Bojan

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


181

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

E-Print Network [OSTI]

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...

Grimaldi Castro, Gabriel Orlando

2007-04-25T23:59:59.000Z

182

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

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

Objectives of the project * Forward modeling geophysical response with fluid flowheat modeling * Joint inversion (stochasticdeterministic) for ground water flow imaging *...

183

Approximating the erfinv function The inverse error function erfinv is a standard component of mathemat-  

E-Print Network [OSTI]

, and its inverse erfinv(x) are a standard part of libraries such as Intel's MKL, AMD's ACML and NVIDIA

Giles, Mike

184

DIRECT SOLUTION OF THE INVERSE STOCHASTIC PROBLEM THROUGH ELEMENTARY MARKOV STATE DISAGGREGATION  

E-Print Network [OSTI]

matrix, inverse eigenvalue problem, state disaggregation. AMS subject classifications. 65F18, 15B51, 15A

Boyer, Edmond

185

Identification of Friction Parameters from the Inverse Analysis of a Direct Extrusion Test  

SciTech Connect (OSTI)

This work proposes to use a special upsetting test and an optimal direct extrusion one performed to identify the constitutive equation of the material behavior and the friction coefficients directly from the load-stroke curves. The proposed friction test has the advantage to permit to take into account contact phenomena corresponding to new specimen surfaces created during a real bulk cold forming process. A lot of numerical simulations are made with the commercial software FORGE2 in order to study the influence of some design and process parameters. Different friction laws will be identified starting from the classical Coulomb and Tresca ones. All the parameter identifications are made using the Inverse Analysis principle.

Adinel, Gavrus; Thien, Pham Duc [LGCGM Laboratory, EA 3913, INSA de RENNES, UEB, CS70839, F-35708, Rennes-Cedex 7 (France); Henri, Francillette [SCR/CM, UMR 6226, INSA de RENNES, UEB, CS70839, F-35708, Rennes-Cedex 7 (France)

2011-01-17T23:59:59.000Z

186

PARTICLE FILTER BASED MULTI-SENSOR FUSION FOR SOLVING LOW FREQUENCY ELECTROMAGNETIC NDE INVERSE PROBLEMS  

E-Print Network [OSTI]

PARTICLE FILTER BASED MULTI-SENSOR FUSION FOR SOLVING LOW FREQUENCY ELECTROMAGNETIC NDE INVERSE 48824 khantari,sdass@msu.edu, r.pradeep@ieee.org Abstract: Flaw profile characterization from NDE from multi-sensor data is considered. The NDE inverse problem is posed as a statistical inverse problem

Dass, Sarat C.

187

Magnetic catalysis and inverse magnetic catalysis in QCD  

E-Print Network [OSTI]

We investigate the effects of strong magnetic fields on the QCD phase structure at vanishing density by solving the gluon and quark gap equations, and by studying the dynamics of the quark scattering with the four-fermi coupling. The chiral crossover temperature as well as the chiral condensate are computed. For asymptotically large magnetic fields we find magnetic catalysis, while we find inverse magnetic catalysis for intermediate magnetic fields. Moreover, for large magnetic fields the chiral phase transition for massless quarks turns into a crossover. The underlying mechanisms are then investigated analytically within a few simplifications of the full numerical analysis. We find that a combination of gluon screening effects and the weakening of the strong coupling is responsible for the phenomenon of inverse catalysis. In turn, the magnetic catalysis at large magnetic field is already indicated by simple arguments based on dimensionality.

Niklas Mueller; Jan M. Pawlowski

2015-02-27T23:59:59.000Z

188

A RANK FOR RIGHT CONGRUENCES ON INVERSE VICTORIA GOULD  

E-Print Network [OSTI]

A RANK FOR RIGHT CONGRUENCES ON INVERSE SEMIGROUPS VICTORIA GOULD Abstract. The sandwich rank, or S­rank, of a right congruence # on a semi­ group S is the Cantor­Bendixson rank of # in the lattice of right congruences RC of S with respect to a topology we call the finite type topology. If ev­ ery # # RC possesses S­rank

Gould, Victoria

189

Assessment of 2D resistivity structures using 1D inversions  

E-Print Network [OSTI]

) E. R. Hoskins (Head of Departsnent) May 1987 ABSTRACT Assessment of 2D Resistivity Structures Using 1D Inversion. (May 1987) Les Paul Beard, B. S. , East Texas State University Chairman of Advisory Committee: Dr. Frank Dale Morgan Resistivity... sections from Schlumberger soundings over and near normal fault. 4. 11 Inverted sections from Wenner soundings over and near nornral fault 4. 12 Schlumberger apparent resistivity contour for normal fault 4. 13 Wenner apparenl resistivity contour...

Beard, Les Paul

1987-01-01T23:59:59.000Z

190

Combined approach to the inverse protein folding problem. Final report  

SciTech Connect (OSTI)

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).

Ruben A. Abagyan

2000-06-01T23:59:59.000Z

191

THE INVERSE OF A SYMMETRIC BANDED TOEPLITZ MATRIX  

E-Print Network [OSTI]

matrices the inverse can be computed numerically using the Trench algorithm 3]. The eigen- values and eigen ::: 2n: (10) It is then not di cult to show that the eigen-values of T are the roots k, ;1 k , k = 1 A has elements As j with the property As j = a(s ; j). In the case of semi-in nite matrices (s j = 0 1

Lavis, David

192

Design operators  

E-Print Network [OSTI]

Design operators is a thesis that investigates the nature and characteristics of the design process by examining the interaction of computation with architectural design. The effects of the introduction of these media in ...

Dritsas, Stylianos, 1978-

2004-01-01T23:59:59.000Z

193

Harmonic inversion analysis of exceptional points in resonance spectra  

E-Print Network [OSTI]

The spectra of, e.g. open quantum systems are typically given as the superposition of resonances with a Lorentzian line shape, where each resonance is related to a simple pole in the complex energy domain. However, at exceptional points two or more resonances are degenerate and the resulting non-Lorentzian line shapes are related to higher order poles in the complex energy domain. In the Fourier-transform time domain an $n$-th order exceptional point is characterised by a non-exponentially decaying time signal given as the product of an exponential function and a polynomial of degree $n-1$. The complex positions and amplitudes of the non-degenerate resonances can be determined with high accuracy by application of the nonlinear harmonic inversion method to the real-valued resonance spectra. We extend the harmonic inversion method to include the analysis of exceptional points. The technique yields, in the energy domain, the amplitudes of the higher order poles contributing to the spectra, and, in the time domain, the coefficients of the polynomial characterising the non-exponential decay of the time signal. The extended harmonic inversion method is demonstrated on two examples, viz. the analysis of exceptional points in resonance spectra of the hydrogen atom in crossed magnetic and electric fields, and an exceptional point occurring in the dynamics of a single particle in a time-dependent harmonic trap.

Jacob Fuchs; Jörg Main; Holger Cartarius; Günter Wunner

2014-02-17T23:59:59.000Z

194

Experimental Design and Inverse Problems in Plant Biological , H.T. Banks  

E-Print Network [OSTI]

crop models, such as the Aquacrop model [15] and decision support system for agrotechnology transfer growth and crop yield. We use a dynamical system model proposed by Zhu., et al. [16], which describes with this dynamical system mathematical model and a statistical model to describe the observation process

195

Inverse transonic wing design using finite-volume methods in curvilinear coordinates  

E-Print Network [OSTI]

&U)i j k = (Ui~h j~b k+ Ui+Q j Q k + Ui Q j+Q k+ Ui h j h k)/4 etc. When extended to the other flux components and to averaging over cube surfaces in three dimensions, the numerical potential equation is of the form: @&f6'(PhU) + @[f6?(PhV) + Pf 6f...(PhW) = 0 Figure 2. Finite-Volume Cell Location To find the flux quantities phU, phV, and phW at the finite volume cell vertices (i. e. points a, b, c, and d for the two dimensional case), it is necessary to evaluate Equations (2) through (4...

Gally, Thomas Anthony

2012-06-07T23:59:59.000Z

196

Inverse Problems, Design and Optimization Symposium (IPDO-2013) Albi, France, June 26-28, 2013  

E-Print Network [OSTI]

materials such as wood, in industrial and residential heating, can significantly reduce the reliance systems in CHP (Combined Heat and Power) [5,6,7,8] or solar heating plants [9,10]. Using this mature

Paris-Sud XI, Université de

197

Experience of light : the use of an inverse method and a genetic algorithm in daylight design  

E-Print Network [OSTI]

Integration of daylight availability in time and architectural space is a critical element in achieving optimal comfort and productivity, as well as in minimizing energy consumption. In recent years, there has been an ...

Chutarat, Acharawan

2001-01-01T23:59:59.000Z

198

Level-set, penalization and cartesian meshes: A paradigm for inverse problems and optimal design  

E-Print Network [OSTI]

l e i n f o Article history: Received 19 June 2008 Received in revised form 12 March 2009 Accepted prices are rising, the automotive and aeronautical industries, besides improvements on motors and masses of their engines, are required to look for aerodynamic ways to re- duce oil consumption, particularly through

Bruneau, Charles-Henri

199

Center for Inverse Design Highlight: Anomalous Surface Conductivity in In2O3 Transparent Conductors  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhite Light

200

Center for Inverse Design Highlight: Enabling Practical p-Type Doping in Oxide Spinels  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhite LightPractical

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


201

Inverse Design of High-Absorption Thin-Film Photovoltaic Materials  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for and ApplicationNuclearLeao Bruno LeaoInventors

202

Inverse Design of Mn-based ternary p-type wide-gap oxides  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for and ApplicationNuclearLeao Bruno LeaoInventorsZnO is

203

Inverse Design of Mn-based ternary p-type wide-gap oxides  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for and ApplicationNuclearLeao Bruno LeaoInventorsZnO

204

AIAA-2004-0502 A COMPARISON OF WIND TURBINE DESIGN LOADS IN DIFFERENT  

E-Print Network [OSTI]

in the gross wind environment and in the extreme response given wind conditions to establish nominal designAIAA-2004-0502 1 A COMPARISON OF WIND TURBINE DESIGN LOADS IN DIFFERENT ENVIRONMENTS USING INVERSE, Austin, TX 78712 ABSTRACT* The influence of turbulence conditions on the design loads for wind turbines

Manuel, Lance

205

Final Technical Report for "Applied Mathematics Research: Simulation Based Optimization and Application to Electromagnetic Inverse Problems"  

SciTech Connect (OSTI)

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.

Haber, Eldad

2014-03-17T23:59:59.000Z

206

MFR PAPER 1033 Research determin es fatty aCid  

E-Print Network [OSTI]

~1 Preparation of Esters \\leth) I e\\ler lIere preparuJ u\\lng the mClhod :r, "ere \\cparated an d Idenlilied u\\lng , Zook E J Powell B Hackley J Emerson J Brooker. and G M Knobl

207

Improving Collision Induced Dissociation (CID), High Energy Collision  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching.348 270 300 219Improvements to the SHDOMCapital

208

Identifying Isotropic Events Using a Regional Moment Tensor Inversion  

SciTech Connect (OSTI)

We calculate the deviatoric and isotropic source components for 17 explosions at the Nevada Test Site, as well as 12 earthquakes and 3 collapses in the surrounding region of the western US, using a regional time-domain full waveform inversion for the complete moment tensor. The events separate into specific populations according to their deviation from a pure double-couple and ratio of isotropic to deviatoric energy. The separation allows for anomalous event identification and discrimination between explosions, earthquakes, and collapses. Confidence regions of the model parameters are estimated from the data misfit by assuming normally distributed parameter values. We investigate the sensitivity of the resolved parameters of an explosion to imperfect Earth models, inaccurate event depths, and data with low signal-to-noise ratio (SNR) assuming a reasonable azimuthal distribution of stations. In the band of interest (0.02-0.10 Hz) the source-type calculated from complete moment tensor inversion is insensitive to velocity models perturbations that cause less than a half-cycle shift (<5 sec) in arrival time error if shifting of the waveforms is allowed. The explosion source-type is insensitive to an incorrect depth assumption (for a true depth of 1 km), and the goodness-of-fit of the inversion result cannot be used to resolve the true depth of the explosion. Noise degrades the explosive character of the result, and a good fit and accurate result are obtained when the signal-to-noise ratio (SNR) is greater than 5. We assess the depth and frequency dependence upon the resolved explosive moment. As the depth decreases from 1 km to 200 m, the isotropic moment is no longer accurately resolved and is in error between 50-200%. However, even at the most shallow depth the resultant moment tensor is dominated by the explosive component when the data have a good SNR.

Ford, S R; Dreger, D S; Walter, W R

2008-11-04T23:59:59.000Z

209

Seismic Attenuation Inversion with t* Using tstarTomog.  

SciTech Connect (OSTI)

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.

Preston, Leiph

2014-09-01T23:59:59.000Z

210

Sneutrino inflation in supersymmetric B - L with inverse seesaw  

SciTech Connect (OSTI)

We have shown that inflation in the supersymmetric B - L extension of the Standard Model can be realized where one of the associated right-handed sneutrinos can provide a non-trivial inflationary trajectory at tree level (hence breaking B - L during inflation). As soon as the inflation ends, the right-handed sneutrino falls into the supersymmetric vacuum, with a vanishing vacuum expectation value, so that B - L symmetry is restored. The B - L gauge symmetry will be radiatively broken at a TeV scale and light neutrino masses are generated through the inverse seesaw mechanism.

Khalil, Shaaban; Sil, Arunansu [Centre for Theoretical Physics, Zewail City of Science and Technology, Sheikh Zayed, 12588, Giza (Egypt); Department of Mathematics, Faculty of Science, Ain Shams University, Cairo, 11566 (Egypt); Department of Physics, Indian Institute of Technology, Guwahati, Assam 781039 (India)

2012-07-27T23:59:59.000Z

211

Proton inelastic scattering on {sup 56}Ni in inverse kinematics  

SciTech Connect (OSTI)

Inelastic proton scattering to the first excited 2{sup +} state at 2.701 MeV in doubly magic {sup 56}Ni was studied at 101 MeV/u in inverse kinematics. The radioactive {sup 56}Ni ion beam was obtained from the SIS heavy ion synchrotron at GSI Darmstadt via fragmentation of a {sup 58}Ni beam, and separation by the fragment separator (FRS). A value B(E2, 0{sup +} {yields} 2{sup +}) = 600 {+-} 120 e{sup 2} fm{sup 4} was obtained which corresponds to a deformation parameter {beta} ({sup 56}Ni) = 0.173 {+-} 0.017.

Kraus, G.; Egelhof, P.; Fischer, C.; Geissel, H.; Himmler, A.; Nickel, F.; Muenzenberg, G.; Schwab, W.; Weiss, A. [GSI, Darmstadt (Germany); Chulkov, L.; Golovkov, M.; Ogloblin, A. [I.V. Kurchatov Inst., Moscow (Russian Federation); Friese, J.; Gillitzer, A.; Koerner, H.J.; Peter, M. [TU, Munich (Germany); Henning, W.; Schiffer, J.P. [Argonne National Lab., IL (United States); Kratz, J.V. [Univ. of Mainz (Germany)

1993-10-01T23:59:59.000Z

212

Nonlinear inverse perturbation in structural dynamics redesign of risers  

SciTech Connect (OSTI)

Marine risers, and offshore structures in general, may have undesirable natural frequencies and/or mode shapes. Structural redesign is mandatory in such cases. An Inverse Perturbation Redesign (IPR) method, which uses only the finite element analysis of the baseline system and was developed in previous work for general structures, is extended in this work to handle systems with geometric stiffness matrices like marine risers. The IPR method is currently applicable to undamped structural systems or systems with Rayleigh damping and is valid for large or small changes which are frequently required to change modal characteristics of offshore structures.

Bernitsas, M.M.; Hoff, C.J.; Kokara kis, J.E.

1985-06-01T23:59:59.000Z

213

Finite Rank Perturbations, Scattering Matrices and Inverse Problems  

E-Print Network [OSTI]

In this paper the scattering matrix of a scattering system consisting of two selfadjoint operators with finite dimensional resolvent difference is expressed in terms of a matrix Nevanlinna function. The problem is embedded into an extension theoretic framework and the theory of boundary triplets and associated Weyl functions for (in general nondensely defined) symmetric operators is applied. The representation results are extended to dissipative scattering systems and an explicit solution of an inverse scattering problem for the Lax-Phillips scattering matrix is presented.

Jussi Behrndt; Mark M. Malamud; Hagen Neidhardt

2009-02-20T23:59:59.000Z

214

Identifying isotropic events using a regional moment tensor inversion  

SciTech Connect (OSTI)

The deviatoric and isotropic source components for 17 explosions at the Nevada Test Site, as well as 12 earthquakes and 3 collapses in the surrounding region of the western US, are calculated using a regional time-domain full waveform inversion for the complete moment tensor. The events separate into specific populations according to their deviation from a pure double-couple and ratio of isotropic to deviatoric energy. The separation allows for anomalous event identification and discrimination between explosions, earthquakes, and collapses. Confidence regions of the model parameters are estimated from the data misfit by assuming normally distributed parameter values. We investigate the sensitivity of the resolved parameters of an explosion to imperfect Earth models, inaccurate event depths, and data with a low signal-to-noise ratio (SNR) assuming a reasonable azimuthal distribution of stations. In the band of interest (0.02-0.10 Hz) the source-type calculated from complete moment tensor inversion is insensitive to velocity models perturbations that cause less than a half-cycle shift (<5 sec) in arrival time error if shifting of the waveforms is allowed. The explosion source-type is insensitive to an incorrect depth assumption (for a true depth of 1 km), but the goodness-of-fit of the inversion result cannot be used to resolve the true depth of the explosion. Noise degrades the explosive character of the result, and a good fit and accurate result are obtained when the signal-to-noise ratio (SNR) is greater than 5. We assess the depth and frequency dependence upon the resolved explosive moment. As the depth decreases from 1 km to 200 m, the isotropic moment is no longer accurately resolved and is in error between 50-200%. However, even at the most shallow depth the resultant moment tensor is dominated by the explosive component when the data has a good SNR. The sensitivity investigation is extended via the introduction of the network sensitivity solution, which takes into account the unique station distribution, frequency band, and SNR of a given test scenario. An example of this analysis is presented for the North Korea test, which shows that in order to constrain the explosive component one needs a certain station configuration. In the future we will analyze the bias in the source-type parameters due to error in the Green's function by incorporating a suite of suitable velocity models in the inversion.

Ford, S R; Dreger, D S; Walter, W R

2008-07-16T23:59:59.000Z

215

Reconstruction of the Primordial Power Spectrum by Direct Inversion  

E-Print Network [OSTI]

We introduce a new method for reconstructing the primordial power spectrum, $P(k)$, directly from observations of the Cosmic Microwave Background (CMB). We employ Singular Value Decomposition (SVD) to invert the radiation perturbation transfer function. The degeneracy of the multipole $\\ell$ to wavenumber $k$ linear mapping is thus reduced. This enables the inversion to be carried out at each point along a Monte Carlo Markov Chain (MCMC) exploration of the combined $P(k)$ and cosmological parameter space. We present best--fit $P(k)$ obtained with this method along with other cosmological parameters.

Nicholson, Gavin; Paykari, Paniez

2009-01-01T23:59:59.000Z

216

Modified Inverse First Order Reliability Method (I-FORM) for Predicting Extreme Sea States.  

SciTech Connect (OSTI)

Environmental contours describing extreme sea states are generated as the input for numerical or physical model simulation s as a part of the stand ard current practice for designing marine structure s to survive extreme sea states. Such environmental contours are characterized by combinations of significant wave height ( ) and energy period ( ) values calculated for a given recurrence interval using a set of data based on hindcast simulations or buoy observations over a sufficient period of record. The use of the inverse first - order reliability method (IFORM) i s standard design practice for generating environmental contours. In this paper, the traditional appli cation of the IFORM to generating environmental contours representing extreme sea states is described in detail and its merits and drawbacks are assessed. The application of additional methods for analyzing sea state data including the use of principal component analysis (PCA) to create an uncorrelated representation of the data under consideration is proposed. A reexamination of the components of the IFORM application to the problem at hand including the use of new distribution fitting techniques are shown to contribute to the development of more accurate a nd reasonable representations of extreme sea states for use in survivability analysis for marine struc tures. Keywords: In verse FORM, Principal Component Analysis , Environmental Contours, Extreme Sea State Characteri zation, Wave Energy Converters

Eckert-Gallup, Aubrey Celia; Sallaberry, Cedric Jean-Marie; Dallman, Ann Renee; Neary, Vincent Sinclair

2014-09-01T23:59:59.000Z

217

Solution accelerators for large scale 3D electromagnetic inverse problems  

SciTech Connect (OSTI)

We provide a framework for preconditioning nonlinear 3D electromagnetic inverse scattering problems using nonlinear conjugate gradient (NLCG) and limited memory (LM) quasi-Newton methods. Key to our approach is the use of an approximate adjoint method that allows for an economical approximation of the Hessian that is updated at each inversion iteration. Using this approximate Hessian as a preconditoner, we show that the preconditioned NLCG iteration converges significantly faster than the non-preconditioned iteration, as well as converging to a data misfit level below that observed for the non-preconditioned method. Similar conclusions are also observed for the LM iteration; preconditioned with the approximate Hessian, the LM iteration converges faster than the non-preconditioned version. At this time, however, we see little difference between the convergence performance of the preconditioned LM scheme and the preconditioned NLCG scheme. A possible reason for this outcome is the behavior of the line search within the LM iteration. It was anticipated that, near convergence, a step size of one would be approached, but what was observed, instead, were step lengths that were nowhere near one. We provide some insights into the reasons for this behavior and suggest further research that may improve the performance of the LM methods.

Newman, Gregory A.; Boggs, Paul T.

2004-04-05T23:59:59.000Z

218

Temporal variability of the trade wind inversion: Measured with a boundary layer vertical profiler. Master's thesis  

SciTech Connect (OSTI)

This study uses Hawaiian Rainband Project (HaRP) data, from the summer of 1991, to show a boundary layer wind profiler can be used to measure the trade wind inversion. An algorithm has been developed for the profiler that objectively measures the depth of the moist oceanic boundary layer. The Hilo inversion, measured by radiosonde, is highly correlated with the moist oceanic boundary layer measured by the profiler at Paradise Park. The inversion height on windward Hawaii is typically 2253 + or - 514 m. The inversion height varies not only on a daily basis, but on less than an hourly basis. It has a diurnal, as well as a three to four day cycle. There appears to be no consistent relationship between inversion height and precipitation. Currently, this profiler is capable of making high frequency (12 minute) measurements of the inversion base variation, as well as other features.

Grindinger, C.M.

1992-05-01T23:59:59.000Z

219

Improved extraction of hydrologic information from geophysical data through coupled hydrogeophysical inversion  

SciTech Connect (OSTI)

There is increasing interest in the use of multiple measurement types, including indirect (geophysical) methods, to constrain hydrologic interpretations. To date, most examples integrating geophysical measurements in hydrology have followed a three-step, uncoupled inverse approach. This approach begins with independent geophysical inversion to infer the spatial and/or temporal distribution of a geophysical property (e.g. electrical conductivity). The geophysical property is then converted to a hydrologic property (e.g. water content) through a petrophysical relation. The inferred hydrologic property is then used either independently or together with direct hydrologic observations to constrain a hydrologic inversion. We present an alternative approach, coupled inversion, which relies on direct coupling of hydrologic models and geophysical models during inversion. We compare the abilities of coupled and uncoupled inversion using a synthetic example where surface-based electrical conductivity surveys are used to monitor one-dimensional infiltration and redistribution.

Hinnell, A.C.; Ferre, T.P.A.; Vrugt, J.A.; Huisman, J.A.; Moysey, S.; Rings, J.; Kowalsky, M.B.

2009-11-01T23:59:59.000Z

220

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

DOE Patents [OSTI]

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.

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

2007-05-01T23:59:59.000Z

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


221

Sub-millimeter tests of the gravitational inverse-square law.  

E-Print Network [OSTI]

??The Newtonian Law of Universal Gravitation states that the strength of the gravitational force between point test bodies falls as the inverse-square of the distance… (more)

Hoyle, Charles D., 1974-

2001-01-01T23:59:59.000Z

222

figures for inverse problem paper in 3d - Department of Mathematics ...  

E-Print Network [OSTI]

FIGURES FOR INVERSE PROBLEM PAPER IN 3D. JUAN E. SANTOS. Departamento de Geof sica Aplicada, Facultad de Ciencias Astron omicas y Geof sicas,.

santos

1910-20-20T23:59:59.000Z

223

Submillimeter Test of the Gravitational Inverse-Square Law Using a Superconducting Differential Accelerometer .  

E-Print Network [OSTI]

??The inverse-square law of gravitation is tested at submillimeter distances. To minimize Newtonian errors, the experiment employs a near null source, a circular disk of… (more)

Prieto, Violeta A

2007-01-01T23:59:59.000Z

224

Partitioned Waveform Inversion Applied to Eurasia and Northern Africa  

SciTech Connect (OSTI)

This report summarizes the data analysis achieved during Heather Bedle's eleven-week Technical Scholar internship at Lawrence Livermore National Labs during the early summer 2006. The work completed during this internship resulted in constraints on the crustal and upper mantle S-velocity structure in Northern Africa, the Mediterranean, the Middle East, and Europe, through the fitting of regional waveform data. This data extends current raypath coverage and will be included in a joint inversion along with data from surface wave group velocity measurements, S and P teleseismic arrival time data, and receiver function data to create an improved velocity model of the upper mantle in this region. The tectonic structure of the North African/Mediterranean/Europe/Middle Eastern study region is extremely heterogeneous. This region consists of, among others, stable cratons and platforms such as the West Africa Craton, and Baltica in Northern Europe; oceanic subduction zones throughout the Mediterranean Sea where the African and Eurasian plate collide; regions of continental collision as the Arabian Plate moves northward into the Turkish Plate; and rifting in the Red Sea, separating the Arabian and Nubian shields. With such diverse tectonic structures, many of the waveforms were difficult to fit. This is not unexpected as the waveforms are fit using an averaged structure. In many cases the raypaths encounter several tectonic features, complicating the waveform, and making it hard for the software to converge on a 1D average structure. Overall, the quality of the waveform data was average, with roughly 30% of the waveforms being discarded due to excessive noise that interfered with the frequency ranges of interest. An inversion for the 3D S-velocity structure of this region was also performed following the methodology of Partitioned Waveform Inversion (Nolet, 1990; Van der Lee and Nolet, 1997). The addition of the newly fit waveforms drastically extends the range of the model. The model now extends as far east in Africa to cover Chad and Niger, and reaches south to cover Zambia. The model is also stretched eastward to cover the eastern half of India, and northward to cover the southern portion of Scandinavia.

bedle, H; Matzel, E; Flanagan, M

2006-07-27T23:59:59.000Z

225

Zeroth-order inversion of transient head observations  

SciTech Connect (OSTI)

A high-frequency, asymptotic solution for transient head,appropriate for a medium containing smoothly varying heterogeneity,provides a basis for efficient inverse modeling. The semi analyticsolution is trajectory based, akin to ray methods used in modeling wavepropagation, and may be constructed by post processing the output of anumerical simulator. For high frequencies, the amplitude sensitivities,the relationship between changes in flow properties and changes in headampliude, are dominated by the phase term which may be computed directlyfrom the output of the simulator. Thus, transient head waveforms may beinverted with little more computation than is required to invert arrivaltimes. An applicatino to synthetic head values indicates that thetechnique can be used to improve the fit to waveforms. An application totransient head data from the Migration experiment in Switzerland revealsa narrow, high conductivity pathway within a 0.5 m thick zone offracturing.

Vasco, D.W.

2007-08-15T23:59:59.000Z

226

Chirped pulse inverse free-electron laser vacuum accelerator  

DOE Patents [OSTI]

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.

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

2002-01-01T23:59:59.000Z

227

Source-independent full waveform inversion of seismic data  

DOE Patents [OSTI]

A set of seismic trace data is collected in an input data set that is first Fourier transformed in its entirety into the frequency domain. A normalized wavefield is obtained for each trace of the input data set in the frequency domain. Normalization is done with respect to the frequency response of a reference trace selected from the set of seismic trace data. The normalized wavefield is source independent, complex, and dimensionless. The normalized wavefield is shown to be uniquely defined as the normalized impulse response, provided that a certain condition is met for the source. This property allows construction of the inversion algorithm disclosed herein, without any source or source coupling information. The algorithm minimizes the error between data normalized wavefield and the model normalized wavefield. The methodology is applicable to any 3-D seismic problem, and damping may be easily included in the process.

Lee, Ki Ha

2006-02-14T23:59:59.000Z

228

Spontaneous generation of local CP violation and inverse magnetic catalysis  

E-Print Network [OSTI]

In the chiral symmetric phase, the polarized instanton--anti-instanton molecule pairing induces a nontrivial repulsive interaction in the iso-scalar axial-vector channel. As a consequence, one unusual property is observed that in the chiral restoration phase, there is a first order phase transition for the spontaneous generation of local CP violation and chiral imbalance. Furthermore, it is found that external magnetic fields will lower the critical temperature for the local CP-odd phase transition and catalyze the chiral imbalance, which destroys the chiral condensate with pairing quarks between different chiralities. A reasonable strength of the repulsive interaction in the iso-scalar axial-vector channel can naturally explain the inverse magnetic catalysis around the critical temperature under external magnetic fields.

Lang Yu; Hao Liu; Mei Huang

2014-09-14T23:59:59.000Z

229

Feasibility of UV lasing without inversion in mercury vapor  

E-Print Network [OSTI]

We investigate the feasibility of UV lasing without inversion at a wavelength of $253.7$ nm utilizing interacting dark resonances in mercury vapor. Our theoretical analysis starts with radiation damped optical Bloch equations for all relevant 13 atomic levels. These master equations are generalized by considering technical phase noise of the driving lasers. From the Doppler broadened complex susceptibility we obtain the stationary output power from semiclassical laser theory. The finite overlap of the driving Gaussian laser beams defines an ellipsoidal inhomogeneous gain distribution. Therefore, we evaluate the intra-cavity field inside a ring laser self-consistently with Fourier optics. This analysis confirms the feasibility of UV lasing and reveals its dependence on experimental parameters.

Martin R. Sturm; Benjamin Rein; Thomas Walther; Reinhold Walser

2014-06-27T23:59:59.000Z

230

Spherical Resorcinol-Formaldehyde Synthesis by Inverse Suspension Polymerization  

SciTech Connect (OSTI)

Base catalyzed sol-gel polycondensation of resorcinol (1,3-dihydroxybenzene) with formaldehyde by inverse suspension polymerization leads to the formation of uniform, highly cross-linked, translucent, spherical gels, which have increased selectivity and capacity for cesium ion removal from high alkaline solutions. Because of its high selectivity for cesium ion, resorcinol-formaldehyde (R-F) resins are being considered for process scale column radioactive cesium removal by ion-exchange at the Waste Treatment and Immobilization Plant (WTP), which is now under construction at the Hanford site. Other specialty resins such as Superlig{reg_sign} 644 have been ground and sieved and column tested for process scale radioactive cesium removal but show high pressure drops across the resin bed during transition from column regeneration to loading and elution. Furthermore, van Deemter considerations indicate better displacement column chromatography by the use of spherical particle beads rather than irregularly shaped ground or granular particles. In our studies batch contact equilibrium experiments using a high alkaline simulant show a definite increase in cesium loading onto spherical R-F resin. Distribution coefficient (Kd) values ranged from 777 to 429 mL/g in the presence of 0.1M and 0.7M potassium ions, respectively. Though other techniques for making R-F resins have been employed, to our knowledge no one has made spherical R-F resins by inverse suspension polymerization. Moreover, in this study we discuss the data comparisons to known algebraic isotherms used to evaluate ion-exchange resins for WTP plant scale cesium removal operations.

Ray, Robert J.; Scrivens, Walter A.; Nash, Charles

2005-10-21T23:59:59.000Z

231

Inverse bremsstrahlung heating rate for dense plasmas in laser fields  

SciTech Connect (OSTI)

We report a theoretical analysis of inverse bremsstrahlung heating rate in the eikonal approximation. The present analysis is performed for a dense plasma using the screened electron-ion interaction potential for the ion charge state Z{sub i} = 1 and for both the weak and strong plasma screening cases. We have also compared the eikonal results with the first Born approximation (FBA) [M. Moll et al., New J. Phys. 14, 065010 (2012)] calculation. We find that the magnitudes of inverse bremsstrahlung heating rate within the eikonal approximation (EA) are larger than the FBA values in the weak screening case (? = 0.03 a.u.) in a wide range of field strength for three different initial electron momenta (2, 3, and 4 a.u.). But for strong screening case (? = 0.3 a.u.), the heating rates predicted by the two approximations do not differ much after reaching their maximum values. Furthermore, the individual contribution of photoemission and photoabsorption processes to heating rate is analysed for both the weak and strong screening cases. We find that the single photoemission and photoabsorption rates are the same throughout the field strength while the multiphoton absorption process dominates over the multiphoton emission process beyond the field strength ? 4×10{sup 8} V/cm. The present study of the dependence of heating rate on the screening parameter ranging from 0.01 to 20 shows that whereas the heating rate predicted by the EA is greater than the FBA up to the screening parameter ? = 0.3 a.u., the two approximation methods yield results which are nearly identical beyond the above value.

Dey, R. [D-203, Samruddhi Residency, Motera, Ahmedabad-380009, Gujarat (India)] [D-203, Samruddhi Residency, Motera, Ahmedabad-380009, Gujarat (India); Roy, A. C. [School of Mathematical Sciences, Ramakrishna Mission Vivekananda University, Belur Math 711202, West Bengal (India)] [School of Mathematical Sciences, Ramakrishna Mission Vivekananda University, Belur Math 711202, West Bengal (India)

2013-07-15T23:59:59.000Z

232

Atmospheric Inverse Estimates of Methane Emissions from Central California  

SciTech Connect (OSTI)

Methane mixing ratios measured at a tall-tower are compared to model predictions to estimate surface emissions of CH{sub 4} in Central California for October-December 2007 using an inverse technique. Predicted CH{sub 4} mixing ratios are calculated based on spatially resolved a priori CH{sub 4} emissions and simulated atmospheric trajectories. The atmospheric trajectories, along with surface footprints, are computed using the Weather Research and Forecast (WRF) coupled to the Stochastic Time-Inverted Lagrangian Transport (STILT) model. An uncertainty analysis is performed to provide quantitative uncertainties in estimated CH{sub 4} emissions. Three inverse model estimates of CH{sub 4} emissions are reported. First, linear regressions of modeled and measured CH{sub 4} mixing ratios obtain slopes of 0.73 {+-} 0.11 and 1.09 {+-} 0.14 using California specific and Edgar 3.2 emission maps respectively, suggesting that actual CH{sub 4} emissions were about 37 {+-} 21% higher than California specific inventory estimates. Second, a Bayesian 'source' analysis suggests that livestock emissions are 63 {+-} 22% higher than the a priori estimates. Third, a Bayesian 'region' analysis is carried out for CH{sub 4} emissions from 13 sub-regions, which shows that inventory CH{sub 4} emissions from the Central Valley are underestimated and uncertainties in CH{sub 4} emissions are reduced for sub-regions near the tower site, yielding best estimates of flux from those regions consistent with 'source' analysis results. The uncertainty reductions for regions near the tower indicate that a regional network of measurements will be necessary to provide accurate estimates of surface CH{sub 4} emissions for multiple regions.

Zhao, Chuanfeng; Andrews, Arlyn E.; Bianco, Laura; Eluszkiewicz, Janusz; Hirsch, Adam; MacDonald, Clinton; Nehrkorn, Thomas; Fischer, Marc L.

2008-11-21T23:59:59.000Z

233

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

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

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.

Pablant, N. A. [PPPL; Bell, R. E. [PPPL; Bitter, M. [PPPL; Delgado-Aparicio, L. [PPPL; Hill, K. W. [PPPL; Lazerson, S. [PPPL; Morita, S. [National Institute for Fusion Science, Toki 509-5292, Gifu, Japan

2014-11-01T23:59:59.000Z

234

MA692: Inverse Scattering Problems for Wave Propagation  

E-Print Network [OSTI]

inhomogeneity, such as location, geometry, or material property, from a ... stealth aircraft design and submarine detection), geophysical exploration (e.g., oil and ...

2013-08-19T23:59:59.000Z

235

SO2 emissions and lifetimes: Estimates from inverse modeling using in situ and global, spacebased  

E-Print Network [OSTI]

SO2 emissions and lifetimes: Estimates from inverse modeling using in situ and global, spacebased 18 March 2011. [1] Topdown constraints on global sulfur dioxide (SO2) emissions are inferred through of GEOSChem for inversion of SO2 columns to emissions. The seasonal mean SO2 lifetime calculated with the GEOS

Martin, Randall

236

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

E-Print Network [OSTI]

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

Avouac, Jean-Philippe

237

Volume Currents in Forward and Inverse MEG Simulations Using Realistic Head Models  

E-Print Network [OSTI]

Volume Currents in Forward and Inverse MEG Simulations Using Realistic Head Models Robert Van of magnetoencephalographic (MEG) forward or inverse sim­ ulations in realistic head models. We verify the accuracy, in an inhomogeneous, non­spherical realistic head model, the magnetic field normal to the MEG detector due to volume

Utah, University of

238

Geostatistical inverse modeling of transient pumping tests using temporal moments of drawdown  

E-Print Network [OSTI]

Geostatistical inverse modeling of transient pumping tests using temporal moments of drawdown Wei 2004; revised 22 April 2005; accepted 3 May 2005; published 2 August 2005. [1] Pumping tests belong from transient pumping tests using the quasi-linear geostatistical approach of inverse modeling

Cirpka, Olaf Arie

239

Gravity inversion using a binary formulation Richard A. Krahenbuhl* and Yaoguo Li  

E-Print Network [OSTI]

Gravity inversion using a binary formulation Richard A. Krahenbuhl* and Yaoguo Li Gravity contrast that gives rise to zero gravity response on the surface. As a result, part of the salt structure structure using gravity data can be divided into two general categories. The first are interface inversions

240

On the Inversion of Mel-Frequency Cepstral Coefficients for Speech Enhancement Applications  

E-Print Network [OSTI]

On the Inversion of Mel-Frequency Cepstral Coefficients for Speech Enhancement Applications Laura E recognition system. The use of GMMs for speech enhancement applications has only recently been proposed present a means to invert MFCCs for use in speech enhancement applications. Results for cepstral inversion

De Leon, Phillip

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


241

Proteome analysis of factor for inversion stimulation (Fis) overproduction in Escherichia coli  

E-Print Network [OSTI]

Proteome analysis of factor for inversion stimulation (Fis) overproduction in Escherichia coli The factor-for-inversion stimulation protein (Fis) is a global regulatory protein in Escherichia coliRNA promoter and enhances transcription 5- to 10-fold in vivo. Fis overexpression results in different effects

Chen, Wilfred

242

Seismic Velocity Inversion with Genetic Algorithms Sushil J. Louis Qinxue Chen Satish Pullammanappallil  

E-Print Network [OSTI]

Seismic Velocity Inversion with Genetic Algorithms Sushil J. Louis Qinxue Chen Satish to compute travel times for seismic waves. However, in practice, we have to solve the inverse problem: travel synthetic seismic models shows that large population sizes are crit- ical to generating good seismic

Louis, Sushil J.

243

An Inverse Problem for Toeplitz Matrices and the Synthesis of Discrete Transmission Lines  

E-Print Network [OSTI]

An Inverse Problem for Toeplitz Matrices and the Synthesis of Discrete Transmission Lines Russel E and inverse problems for a transmission line which consists of piecewise constant components. Knowing the impulse response of the transmission line, we can calculate the capaci- tance taper of the line, and vice

Allen, Jont

244

Stability and error analysis of the polarization estimation inverse problem for solid oxide fuel cells.  

E-Print Network [OSTI]

describe the performance of a solid oxide fuel cell requires the solution of an inverse problem. Two at the electrodeelectrolyte interfaces of solid oxide fuel cells (SOFC) is investigated physically using ElectrochemicalStability and error analysis of the polarization estimation inverse problem for solid oxide fuel

Renaut, Rosemary

245

On an inverse problem: Recovery of non-smooth solutions to backward heat equation  

E-Print Network [OSTI]

On an inverse problem: Recovery of non-smooth solutions to backward heat equation Fabien Ternat 2011 Accepted 2 November 2011 Available online 11 November 2011 Keywords: Heat equation Inverse problem and Crank­Nicolson schemes and applied successfully to solve for smooth solutions of backward heat equation

Daripa, Prabir

246

The inverse scattering problem for a discrete Sturm-Liouville equation on the line  

SciTech Connect (OSTI)

This paper investigates the inverse scattering problem for a discrete Sturm-Liouville equation on the entire line with coefficients that stabilize to zero in one direction. We derive a necessary and a sufficient condition on the scattering data so that the inverse problem is uniquely solvable. Bibliography: 23 titles.

Khanmamedov, Agil Kh [Baku State University, Baku (Azerbaijan)

2011-07-31T23:59:59.000Z

247

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan 1,3  

E-Print Network [OSTI]

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan based on Inverse Reinforcement Learning (IRL). The task of building the user simulator is perceived is an expensive process. User simulators aim at simulating human users in order to generate synthetic data

Paris-Sud XI, Université de

248

Partial and Full Inverse Compensation for Hysteresis in Smart Material Systems  

E-Print Network [OSTI]

Partial and Full Inverse Compensation for Hysteresis in Smart Material Systems Ralph C. Smith Chad Smart material transducers employing piezoceramic or magnetostrictive drive components typically exhibit and hysteresis in­ herent to the smart material components. The second technique employs a partial inverse

249

E-Print Network 3.0 - automated signal processing Sample Search...  

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

, Ahmed Abdel-Rahim b,1 Summary: in CIDScript language. 8.2. Traffic signal controller troubleshooting The CID automated test tool allows... Design of traffic controller...

250

LENDA, a Low Energy Neutron Detector Array for experiments with radioactive beams in inverse kinematics  

E-Print Network [OSTI]

The Low Energy Neutron Detector Array (LENDA) is a neutron time-of-flight (TOF) spectrometer developed at the National Superconducting Cyclotron Lab- oratory (NSCL) for use in inverse kinematics experiments with rare isotope beams. Its design has been motivated by the need to study the spin-isospin response of unstable nuclei using (p, n) charge-exchange reactions at intermediate energies (> 100 MeV/u). It can be used, however, for any reaction study that involves emission of low energy neutrons (150 keV - 10 MeV). The array consists of 24 plastic scintillator bars and is capable of registering the recoiling neutron energy and angle with high detection efficiency. The neutron energy is determined by the time-of-flight technique, while the position of interaction is deduced using the timing and energy information from the two photomultipliers of each bar. A simple test setup utilizing radioactive sources has been used to characterize the array. Results of test measurements are compared with simulations. A neutron energy threshold of 20 % for neutrons below 4 MeV have been obtained.

G. Perdikakis; M. Sasano; Sam M. Austin; D. Bazin; C. Caesar; S. Cannon; J. M. Deaven; H. J. Doster; C. J. Guess; G. W. Hitt; J. Marks; R. Meharchand; D. T. Nguyen; D. Peterman; A. Prinke; M. Scott; Y. Shimbara; K. Thorne; L. Valdez; R. G. T. Zegers

2012-05-21T23:59:59.000Z

251

Radial Inflow Gas Turbine Flow Path Design  

E-Print Network [OSTI]

Abstract:- A new method for radial inflow gas turbine flow paths design based on a unique integrated conceptual design environment AxSTREAM is presented in this paper. This integrated environment is a seamless and swift processing scheme that incorporates stages aerodynamic analysis and preliminary design/sizing based on the one dimensional method. The environment makes possible to find number of different designs with inverse task solver, basing on initially specified boundary conditions, closing conditions and design variables. Design space explorer provides easy and visual comparison for range of obtained design in customizable coordinate axes. Solution filtering on different parameters, such as meridional and axial dimensions, maximal blades weight, saving the time to choose from thousands obtained solutions the only one right design. Flexibility of presented approach allows to built-up complete gas turbine flow path from consequence of individual elements: stationary and rotating elements, ducts, heat exchangers, and analyze it in common environment. Complete control of all aspects of aerodynamic flow path quality, structural reliability, and integral performances on design and offdesign conditions is performing throughout all design process. This gives full interaction between user and system for immediate correction and enhancement of current design data using various optimization capabilities to feel the impact of changes on each design step. Integrated system AxSTREAM significantly shortening the design cycle time from initial machine concept to finalized design with all offdesign performances details. The design process is demonstrated for a 25kW radial inflow gas turbine. Keywords:- Radial Inflow Turbine, Performance Maps, AxSTREAM I.

Samip Shah; Gaurang Chaudhri; Digvijay Kulshreshtha; S. A. Channiwalla

252

Acceleration of electrons using an inverse free electron laser auto- accelerator  

SciTech Connect (OSTI)

We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW's) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-optical resonator. The electron beam then traverses a second section of undulator where a fraction of the electrons is accelerated by stimulated absorption of the 1.65 mm wavelength power developed in the first undulator section. The second undulator section has very low gain and does not generate power on its own. We have found that as much as 60% of the power generated in the first section can be absorbed in the second section, providing that the initial electron energy is chosen correctly with respect to the parameters chosen for the first and second undulators. An electron momentum spectrometer is used to monitor the distribution of electron energies as the electrons exit the IFELA. We have found; using our experimental parameters, that roughly 10% of the electrons are accelerated to energies as high as 1100 keV, in accordance with predictions from the numerical model. The appearance of high energy electrons is correlated with the abrupt absorption of millimeter power. The autoaccelerator configuration is used because there is no intense source of coherent power at the 1.65 mm design wavelength other than the FEL.

Wernick, I.K.; Marshall, T.C.

1992-07-01T23:59:59.000Z

253

Acceleration of electrons using an inverse free electron laser auto- accelerator  

SciTech Connect (OSTI)

We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW`s) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-optical resonator. The electron beam then traverses a second section of undulator where a fraction of the electrons is accelerated by stimulated absorption of the 1.65 mm wavelength power developed in the first undulator section. The second undulator section has very low gain and does not generate power on its own. We have found that as much as 60% of the power generated in the first section can be absorbed in the second section, providing that the initial electron energy is chosen correctly with respect to the parameters chosen for the first and second undulators. An electron momentum spectrometer is used to monitor the distribution of electron energies as the electrons exit the IFELA. We have found; using our experimental parameters, that roughly 10% of the electrons are accelerated to energies as high as 1100 keV, in accordance with predictions from the numerical model. The appearance of high energy electrons is correlated with the abrupt absorption of millimeter power. The autoaccelerator configuration is used because there is no intense source of coherent power at the 1.65 mm design wavelength other than the FEL.

Wernick, I.K.; Marshall, T.C.

1992-07-01T23:59:59.000Z

254

New advances in three-dimensional controlled-sourceelectromagnetic inversion  

SciTech Connect (OSTI)

New techniques for improving both the computational andimaging performance of the three dimensional (3D) electromagnetic inverseproblem are presented. A non-linear conjugate gradient algorithm is theframework of the inversion scheme. Full wave equation modelling forcontrolled sources is utilized for data simulation along with anefficient gradient computation approach for the model update. Improvingthe modelling efficiency of the 3D finite difference method involves theseparation of the potentially large modelling mesh, defining the set ofmodel parameters, from the computational finite difference meshes usedfor field simulation. Grid spacings and thus overall grid sizes can bereduced and optimized according to source frequencies and source-receiveroffsets of a given input data set. Further computational efficiency isobtained by combining different levels of parallelization. While theparallel scheme allows for an arbitrarily large number of parallel tasks,the relative amount of message passing is kept constant. Imageenhancement is achieved by model parameter transformation functions,which enforce bounded conductivity parameters and thus prevent parameterovershoots. Further, a remedy for treating distorted data within theinversion process is presented. Data distortions simulated here includepositioning errors and a highly conductive overburden, hiding the desiredtarget signal. The methods are demonstrated using both synthetic andfield data.

Commer, Michael; Newman, Gregory A.

2007-05-19T23:59:59.000Z

255

Solving Inverse Detection Problems Using Passive Radiation Signatures  

SciTech Connect (OSTI)

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.

Favorite, Jeffrey A. [Los Alamos National Laboratory; Armstrong, Jerawan C. [Los Alamos National Laboratory; Vaquer, Pablo A. [Los Alamos National Laboratory

2012-08-15T23:59:59.000Z

256

Nonlocal independent pixel approximation: Direct and inverse problems  

SciTech Connect (OSTI)

The independent pixel approximation (IPA), which treats radiative properties of each pixel independently by using standard plane-parallel calculations preserves scale-invariance found in the analyses of the horizontal variability of liquid water in marine stratocumulus clouds. Several studies, however, report a violation of scale-invariance in LANDSAT cloud radiance fields that are much smoother than cloud structure on small scales. This shows a limitation of IPA on small scales: it is unable to simulate the smooth small-scale behavior that is due to the horizontal photon transport. This paper introduces a nonlocal independent pixel approximation (NIPA) that extends the IPA by incorporating empirically the smoothing effects of horizontal interpixel fluxes through a convolution product of the IPA and an approximate Green function for radiative transfer. The authors also address the inverse problem of cloud optical depth retrieval from satellite data, showing how NIPA can be used to overcome the limitations of current IPA-based methods at small scales.

Marshak, A. [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch] [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch; [Univ. of Maryland Baltimore County, Baltimore, MD (United States). Joint Center for Earth Systems Technology; Davis, A. [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch] [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch; [Science Systems and Applications, Inc., Lanham, MD (United States); Cahalan, R.F.; Wiscombe, W. [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch] [NASA Goddard Space Flight Center, Greenbelt, MD (United States). Climate and Radiation Branch

1998-01-01T23:59:59.000Z

257

Development of an Inverse Algorithm for Resonance Inspection  

SciTech Connect (OSTI)

Resonance inspection (RI), which employs the natural frequency spectra shift between the good and the anomalous part populations to detect defects, is a non-destructive evaluation (NDE) technique with many advantages such as low inspection cost, high testing speed, and broad applicability to structures with complex geometry compared to other contemporary NDE methods. It has already been widely used in the automobile industry for quality inspections of safety critical parts. Unlike some conventionally used NDE methods, the current RI technology is unable to provide details, i.e. location, dimension, or types, of the flaws for the discrepant parts. Such limitation severely hinders its wide spread applications and further development. In this study, an inverse RI algorithm based on maximum correlation function is proposed to quantify the location and size of flaws for a discrepant part. A dog-bone shaped stainless steel sample with and without controlled flaws are used for algorithm development and validation. The results show that multiple flaws can be accurately pinpointed back using the algorithms developed, and the prediction accuracy decreases with increasing flaw numbers and decreasing distance between flaws.

Lai, Canhai; Xu, Wei; Sun, Xin

2012-10-01T23:59:59.000Z

258

Direct and Inverse Cascades in the Wind-Driven Sea  

E-Print Network [OSTI]

We offer a new form for the S(nl) term in the Hasselmann kinetic equation for squared wave amplitudes of wind-driven gravity wave. This form of S(nl) makes possible to rewrite in differential form the conservation laws for energy, momentum, and wave action, and introduce their fluxes by a natural way. We show that the stationary kinetic equation has a family of exact Kolmogorov-type solutions governed by the fluxes of motion constants: wave action, energy, and momentum. The simple "local" model for S(nl) term that is equivalent to the "diffusion approximation" is studied in details. In this case, Kolmogorov spectra are found in the explicit form. We show that a general solution of the stationary kinetic equation behind the spectral peak is described by the Kolmogorov-type solution with frequency-dependent fluxes. The domains of "inverse cascade" and "direct cascade" can be separated by natural way. The spectrum in the universal domain is close to $\\omega^{-4}$.

Zakharov, Vladimir E

2015-01-01T23:59:59.000Z

259

Attractive Inverse Square Potential, U(1) Gauge, and Winding Transitions  

E-Print Network [OSTI]

The inverse square potential arises in a variety of different quantum phenomena, yet notoriously it must be handled with care: it suffers from pathologies rooted in the mathematical foundations of quantum mechanics. We show that its recently studied conformality-breaking corresponds to an infinitely smooth winding-unwinding topological transition for the {\\it classical} statistical mechanics of a one-dimensional system: this describes the the tangling/untangling of floppy polymers under a biasing torque. When the ratio between torque and temperature exceeds a critical value the polymer undergoes tangled oscillations, with an extensive winding number. At lower torque or higher temperature the winding number per unit length is zero. Approaching criticality, the correlation length of the order parameter---the extensive winding number---follows a Kosterlitz-Thouless type law. The model is described by the Wilson line of a (0+1) $U(1)$ gauge theory, and applies to the tangling/untangling of floppy polymers and to the winding/diffusing kinetics in diffusion-convection-reactions.

Cristiano Nisoli; Alan. R. Bishop

2014-10-18T23:59:59.000Z

260

Nonlinear Adaptive Dynamic Inversion Control for Hypersonic Vehicles  

E-Print Network [OSTI]

Because of the widely varying flight conditions in which hypersonic vehicles operate and certain aspects unique to hypersonic flight, the development of control architectures for these vehicles presents a challenge. Previous work on control design...

Rollins, Elizabeth

2013-09-03T23:59:59.000Z

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


261

Inverse problems in elliptic charged-particle beams  

E-Print Network [OSTI]

The advantages of elliptic (or sheet) beams have been known for many years, but their inherent three-dimensional nature presents significant theoretical, design, and experimental challenges in the development of elliptic ...

Bhatt, Ronak Jayant

2006-01-01T23:59:59.000Z

262

Inverse Cotton-Mouton effect of the Vacuum and of atomic sys-C. Rizzo1,2,3  

E-Print Network [OSTI]

epl draft Inverse Cotton-Mouton effect of the Vacuum and of atomic sys- tems C. Rizzo1,2,3 , A.mm.xx ­ Third pacs description Abstract. - In this letter we calculate the Inverse Cotton-Mouton Effect (ICME magnetic field and a powerful light source are necessary. One of these effects is the inverse Cotton

Boyer, Edmond

263

Anomaly-free perturbations with inverse-volume and holonomy corrections in Loop Quantum Cosmology  

E-Print Network [OSTI]

This article addresses the issue of the closure of the algebra of constraints for generic (cosmological) perturbations when taking into account simultaneously the two main corrections of effective loop quantum cosmology, namely the holonomy and the inverse-volume terms. Previous works on either the holonomy or the inverse volume case are reviewed and generalized. In the inverse-volume case, we point out new possibilities. An anomaly-free solution including both corrections is found for perturbations, and the corresponding equations of motion are derived.

Thomas Cailleteau; Linda Linsefors; Aurelien Barrau

2014-03-04T23:59:59.000Z

264

A quantitative study of the low-level inversion in interior Alaska  

E-Print Network [OSTI]

conditions for the study periods c. Synoptic situation for the study periods 12 12 15 5. THE ENERGY BUDGET OF THE INVERSION LAYER a. The budget equation b. Radiation theory and procedure 29 29 32 1. The radiation budget equation 2. Effect of cloud... is an important thermal process and subsidence is an important mechanical process. Examples of these different types of inversions are pre- sented in Fig. 1, which is modified from a discussion by Petterssen (1956). Fig. 1 A is a typical radiation inversion...

Adamowicz, Peter Michael

1972-01-01T23:59:59.000Z

265

Rayleigh scattering and nonlinear inversion of elastic waves  

SciTech Connect (OSTI)

Rayleigh scattering of elastic waves by an inclusion is investigated and the limitations determined. In the near field of the inhomogeneity, the scattered waves are up to a factor of 300 stronger than in the far field, excluding the application of the far field Rayleigh approximation for this range. The investigation of the relative error as a function of parameter perturbation shows a range of applicability broader than previously assumed, with errors of 37% and 17% for perturbations of {minus}100% and +100%, respectively. The validity range for the Rayleigh limit is controlled by large inequalities, and therefore, the exact limit is determined as a function of various parameter configurations, resulting in surprisingly high values of up to k{sub p}R = 0.9. The nonlinear scattering problem can be solved by inverting for equivalent source terms (moments) of the scatterer, before the elastic parameters are determined. The nonlinear dependence between the moments and the elastic parameters reveals a strong asymmetry around the origin, which will produce different results for weak scattering approximations depending on the sign of the anomaly. Numerical modeling of cross hole situations shows that near field terms are important to yield correct estimates of the inhomogeneities in the vicinity of the receivers, while a few well positioned sources and receivers considerably increase the angular coverage, and thus the model resolution of the inversion parameters. The pattern of scattered energy by an inhomogeneity is complicated and varies depending on the object, the wavelength of the incident wave, and the elastic parameters involved. Therefore, it is necessary to investigate the direction of scattered amplitudes to determine the best survey geometry.

Gritto, R.

1995-12-01T23:59:59.000Z

266

Numerical design of a transonic airfoil having a Stratford pressure recovery  

E-Print Network [OSTI]

, TRANDES, for engineering applications. By ut1lizing TRANDES for both the design phase and the following extensive analysis, the features of the inverse approach to the a 1rfoil design problem were investigated. Finally, a second airfoil was designed... surface lift region contributes significantly to the total section lift, and these ai rfoils show a delay in drag rise Mach number of approximately 0. 1 over the NACA 6-series airfoils. Recently, a family of high lift, low drag airfoils employing...

Rocholl, Bruce Martin

1978-01-01T23:59:59.000Z

267

DESIGN SUPPORT TOOLS 599 INTERNATIONAL DESIGN CONFERENCE -DESIGN 2012  

E-Print Network [OSTI]

DESIGN SUPPORT TOOLS 599 INTERNATIONAL DESIGN CONFERENCE - DESIGN 2012 Dubrovnik - Croatia, May 21 - 24, 2012. CAN COMPUTER GRAPHIC SYSTEM BE USED TO INFORM DESIGNERS ABOUT INCLUSIVITY? E. Zitkus, P. Langdon and P. J. Clarkson Keywords: inclusive design, accessibility, CAD, design process 1. Introduction

Crilly, Nathan

268

Meta-Design--Design for Designers Gerhard Fischer  

E-Print Network [OSTI]

1 Meta-Design--Design for Designers Gerhard Fischer Center for LifeLong Learning and Design (L3 D-0430 USA gerhard@cs.colorado.edu Eric Scharff Center for LifeLong Learning and Design (L3 D) Department scharffe@cs.colorado.edu ABSTRACT One fundamental challenge for the design of the interactive systems

Fischer, Gerhard

269

Bayesian reconstruction of the cosmological large-scale structure: methodology, inverse algorithms and numerical optimization  

E-Print Network [OSTI]

We address the inverse problem of cosmic large-scale structure reconstruction from a Bayesian perspective. For a linear data model, a number of known and novel reconstruction schemes, which differ in terms of the underlying signal prior, data likelihood, and numerical inverse extra-regularization schemes are derived and classified. The Bayesian methodology presented in this paper tries to unify and extend the following methods: Wiener-filtering, Tikhonov regularization, Ridge regression, Maximum Entropy, and inverse regularization techniques. The inverse techniques considered here are the asymptotic regularization, the Jacobi, Steepest Descent, Newton-Raphson, Landweber-Fridman, and both linear and non-linear Krylov methods based on Fletcher-Reeves, Polak-Ribiere, and Hestenes-Stiefel Conjugate Gradients. The structures of the up-to-date highest-performing algorithms are presented, based on an operator scheme, which permits one to exploit the power of fast Fourier transforms. Using such an implementation of t...

Kitaura, F S

2007-01-01T23:59:59.000Z

270

Stochastic and Deterministic Inversion Methods for History Matching of Production and Time-Lapse Seismic Data  

E-Print Network [OSTI]

localization method to improve data assimilation performance while capturing geologic continuities that affect the flow dynamics and preserving model variability among the ensemble of models. For the streamline-based inversion method, we derived saturation...

Watanabe, Shingo

2013-08-26T23:59:59.000Z

271

Comprehensive inverse modeling for the study of carrier transport models in sub-50nm MOSFETs  

E-Print Network [OSTI]

Direct quantitative 2-D characterization of sub-50 nm MOSFETs continues to be elusive. This research develops a comprehensive indirect inverse modeling technique for extracting 2-D device topology using combined log(I)-V ...

Djomehri, Ihsan Jahed, 1976-

2002-01-01T23:59:59.000Z

272

Property estimation using inverse methods for elliptic and parabolic partial differential equations  

E-Print Network [OSTI]

In this work we use inverse methods to estimate flow coefficients in both elliptic and parabolic partial differential equations. An algorithm is developed to solve a one layer problem for elliptic and parabolic partial differential equations...

Parmekar, Sandeep

1994-01-01T23:59:59.000Z

273

Nitrous oxide emissions 1999 to 2009 from a global atmospheric inversion  

E-Print Network [OSTI]

N[subscript 2]O surface fluxes were estimated for 1999 to 2009 using a time-dependent Bayesian inversion technique. Observations were drawn from 5 different networks, incorporating 59 surface sites and a number of ship-based ...

Thompson, R. L.

274

Estimation of Impedance Using Seismic Reflection Data Based on Transdimensional Inversion  

E-Print Network [OSTI]

Deterministic seismic inversion can obtain optimal results when there is a linear relationship between data and model parameters during local optimization (single optimum solution). For nonlinear geophysical problems and in the presence of multiple...

Dadi, Sireesh

2014-04-23T23:59:59.000Z

275

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

Open Energy Info (EERE)

Scale 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...

276

Parameter Identification for a Dispersive Dielectric in 2D Electromagnetics: Forward and Inverse  

E-Print Network [OSTI]

Parameter Identification for a Dispersive Dielectric in 2D Electromagnetics: Forward and Inverse with a Debye dielectric slab and PML absorbing boundaries. This system assumes that the electric #12;Parameter

277

Waveform Inversion with Source Encoding for Breast Sound Speed Reconstruction in Ultrasound Computed Tomography  

E-Print Network [OSTI]

Ultrasound computed tomography (USCT) holds great promise for improving the detection and management of breast cancer. Because they are based on the acoustic wave equation, waveform inversion-based reconstruction methods can produce images that possess improved spatial resolution properties over those produced by ray-based methods. However, waveform inversion methods are computationally demanding and have not been applied widely in USCT breast imaging. In this work, source encoding concepts are employed to develop an accelerated USCT reconstruction method that circumvents the large computational burden of conventional waveform inversion methods. This method, referred to as the waveform inversion with source encoding (WISE) method, encodes the measurement data using a random encoding vector and determines an estimate of the sound speed distribution by solving a stochastic optimization problem by use of a stochastic gradient descent algorithm. Both computer-simulation and experimental phantom studies are conduc...

Wang, Kun; Anis, Fatima; Li, Cuiping; Duric, Neb; Anastasio, Mark A

2015-01-01T23:59:59.000Z

278

Particle-Filter-Based Multisensor Fusion For Solving Low-Frequency Electromagnetic NDE Inverse Problems  

SciTech Connect (OSTI)

Flaw profile characterization from NDE measurements is a typical inverse problem. A novel transformation of this inverse problem into a tracking problem, and subsequent application of a sequential Monte Carlo method called particle filtering, has been proposed by the authors in an earlier publication [1]. In this study, the problem of flaw characterization from multi-sensor data is considered. The NDE inverse problem is posed as a statistical inverse problem and particle filtering is modified to handle data from multiple measurement modes. The measurement modes are assumed to be independent of each other with principal component analysis (PCA) used to legitimize the assumption of independence. The proposed particle filter based data fusion algorithm is applied to experimental NDE data to investigate its feasibility.

Khan, T.; Ramuhalli, Pradeep; Dass, Sarat

2011-06-30T23:59:59.000Z

279

Application Of 3D Inversion To Magnetotelluric Data In The Ogiri...  

Open Energy Info (EERE)

Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal Area, Japan Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Application Of 3D...

280

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

E-Print Network [OSTI]

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 ...

Locatelli, R.

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


281

Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods  

E-Print Network [OSTI]

Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a ...

Rintoul, Stephen R. (Stephen Rich)

1988-01-01T23:59:59.000Z

282

Design Modifications for Increasing the BOM and EOM Power Output and Reducing the Size and Mass of RTG for the Pluto Mission  

SciTech Connect (OSTI)

A companion paper analyzed the effect on source modules for three specific fuel options, and compared the predicted power output with JPL's latest goals for the Pluto Fast Flyby (PFF) mission. The results showed that a 5-module RTG cannot fully meet JPL's goals with any of the available fuels; and that a 6-module RTG more than meets those goals with Russian fuel, almost meets them with U.S. (Cassini-type) fuel, but still falls far short of meeting them with the depleted fuel from the aged (1982) Galileo spare RTG. The inadequacy of the aged fuel was disappointing,because heat source modules made from it already exist, and their use in PFF could result in substantial cost savings. The present paper describes additional analyses which showed that a six-module RTG with the aged fuel can meet JPL's stipulated power margin with a relatively simple design modification, that a second design modification makes it possible to recover all of the mass and size penalty for going from five to six heat source modules, and that a third modification could raise the EOM power margin to 16%. There are four copies in the file. Cross Reference ESD Files FSC-ESD-217-94-531 (CID #8572)

Schock, Alfred; Or, Chuen T; Kumar, Vasanth

1994-06-01T23:59:59.000Z

283

A Unified Approach to Various Techniques for the Nonuniqueness of the Inverse Gravimetric Problem  

E-Print Network [OSTI]

­posed inverse problem is the inversion of New- ton's Law of Gravitation V (y) = B D(x) |x - y| dx , where V is the gravitational potential, which is given, for example at the Earth's surface or at satellite height, is the gravitational constant, B is the closed unit ball, and D L2(B) is the unknown mass density function. The first

284

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

SciTech Connect (OSTI)

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.

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

2013-05-01T23:59:59.000Z

285

A parallel solution of the inverse problem associated with a hyperbolic partial differential equation  

E-Print Network [OSTI]

A PARALLEL SOLUTION OF THE INVERSE PROBLEM ASSOCIATED WITH A HYPERBOLIC PARTIAL DIFFERENTIAL EQUATION A Thesis by MIKE RANDALL PHILLIPS Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1993 Major Subject: Computer Science A PARALLEL SOLUTION OF THE INVERSE PROBLEM ASSOCIATED WITH A HYPERBOLIC PARTIAL DIFFERENTIAL EQUATION A Thesis by MIKE RANDALL PHILLIPS Approved as to style...

Phillips, Mike Randall

1993-01-01T23:59:59.000Z

286

On Assessing the Accuracy of Offshore Wind Turbine Reliability-Based Design Loads from the Environmental Contour Method  

E-Print Network [OSTI]

On Assessing the Accuracy of Offshore Wind Turbine Reliability-Based Design Loads from to derive design loads for an active stall-regulated offshore wind turbine. Two different Danish offshore contour method; wind turbine; offshore; reliability. INTRODUCTION Inverse reliability techniques

Manuel, Lance

287

Spatially-Variant Tikhonov Regularization for Double-Difference Waveform Inversion  

SciTech Connect (OSTI)

Double-difference waveform inversion is a potential tool for quantitative monitoring for geologic carbon storage. It jointly inverts time-lapse seismic data for changes in reservoir geophysical properties. Due to the ill-posedness of waveform inversion, it is a great challenge to obtain reservoir changes accurately and efficiently, particularly when using time-lapse seismic reflection data. Regularization techniques can be utilized to address the issue of ill-posedness. The regularization parameter controls the smoothness of inversion results. A constant regularization parameter is normally used in waveform inversion, and an optimal regularization parameter has to be selected. The resulting inversion results are a trade off among regions with different smoothness or noise levels; therefore the images are either over regularized in some regions while under regularized in the others. In this paper, we employ a spatially-variant parameter in the Tikhonov regularization scheme used in double-difference waveform tomography to improve the inversion accuracy and robustness. We compare the results obtained using a spatially-variant parameter with those obtained using a constant regularization parameter and those produced without any regularization. We observe that, utilizing a spatially-variant regularization scheme, the target regions are well reconstructed while the noise is reduced in the other regions. We show that the spatially-variant regularization scheme provides the flexibility to regularize local regions based on the a priori information without increasing computational costs and the computer memory requirement.

Lin, Youzuo [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Zhang, Zhigang [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

288

An efficient strategy for the inversion of bidirectional reflectance models with satellite remote sensing data  

SciTech Connect (OSTI)

The angular distribution of radiation scattered by the earth surface contains information on the structural and optical properties of the surface. Potentially, this information may be retrieved through the inversion of surface bidirectional reflectance distribution function (BRDF) models. This report details the limitations and efficient application of BRDF model inversions using data from ground- and satellite-based sensors. A turbid medium BRDF model, based on the discrete ordinates solution to the transport equation, was used to quantify the sensitivity of top-of-canopy reflectance to vegetation and soil parameters. Results were used to define parameter sets for inversions. Using synthetic reflectance values, the invertibility of the model was investigated for different optimization algorithms, surface and sampling conditions. Inversions were also conducted with field data from a ground-based radiometer. First, a soil BRDF model was inverted for different soil and sampling conditions. A condition-invariant solution was determined and used as the lower boundary condition in canopy model inversions. Finally, a scheme was developed to improve the speed and accuracy of inversions.

Privette, J.L.

1994-12-31T23:59:59.000Z

289

Design Quality Criteria Design Quality Criteria  

E-Print Network [OSTI]

Design Quality Criteria 19 Chapter 2 Design Quality Criteria This chapter discusses what qualities are desirable of an application protocol design, and what quality criteria can be used when evaluating or engineering an application protocol design. We recognize that design quality must be enabled by the design

van Sinderen, Marten

290

Institute of Design Institute of Design  

E-Print Network [OSTI]

Institute of Design Institute of Design 350 N. LaSalle St. Chicago, IL 60610 312.595.4900 design The Institute of Design has continuously explored emerg- ing ideas about how design interacts with society languages and use of new media and material. The school was renamed the Institute of Design (ID) in 1944

Heller, Barbara

291

Design Considerations  

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 Office of Inspector General Office of Audit Services AuditTransatlantic Relations & the196-2011Waste viaDesign Code

292

Efficient Inversion of Mult-frequency and Multi-Source Electromagnetic Data  

SciTech Connect (OSTI)

The project covered by this report focused on development of efficient but robust non-linear inversion algorithms for electromagnetic induction data, in particular for data collected with multiple receivers, and multiple transmitters, a situation extremely common in eophysical EM subsurface imaging methods. A key observation is that for such multi-transmitter problems each step in commonly used linearized iterative limited memory search schemes such as conjugate gradients (CG) requires solution of forward and adjoint EM problems for each of the N frequencies or sources, essentially generating data sensitivities for an N dimensional data-subspace. These multiple sensitivities allow a good approximation to the full Jacobian of the data mapping to be built up in many fewer search steps than would be required by application of textbook optimization methods, which take no account of the multiplicity of forward problems that must be solved for each search step. We have applied this idea to a develop a hybrid inversion scheme that combines features of the iterative limited memory type methods with a Newton-type approach using a partial calculation of the Jacobian. Initial tests on 2D problems show that the new approach produces results essentially identical to a Newton type Occam minimum structure inversion, while running more rapidly than an iterative (fixed regularization parameter) CG style inversion. Memory requirements, while greater than for something like CG, are modest enough that even in 3D the scheme should allow 3D inverse problems to be solved on a common desktop PC, at least for modest (~ 100 sites, 15-20 frequencies) data sets. A secondary focus of the research has been development of a modular system for EM inversion, using an object oriented approach. This system has proven useful for more rapid prototyping of inversion algorithms, in particular allowing initial development and testing to be conducted with two-dimensional example problems, before approaching more computationally cumbersome three-dimensional problems.

Gary D. Egbert

2007-03-22T23:59:59.000Z

293

Three-dimensional electromagnetic modeling and inversion on massively parallel computers  

SciTech Connect (OSTI)

This report has demonstrated techniques that can be used to construct solutions to the 3-D electromagnetic inverse problem using full wave equation modeling. To this point great progress has been made in developing an inverse solution using the method of conjugate gradients which employs a 3-D finite difference solver to construct model sensitivities and predicted data. The forward modeling code has been developed to incorporate absorbing boundary conditions for high frequency solutions (radar), as well as complex electrical properties, including electrical conductivity, dielectric permittivity and magnetic permeability. In addition both forward and inverse codes have been ported to a massively parallel computer architecture which allows for more realistic solutions that can be achieved with serial machines. While the inversion code has been demonstrated on field data collected at the Richmond field site, techniques for appraising the quality of the reconstructions still need to be developed. Here it is suggested that rather than employing direct matrix inversion to construct the model covariance matrix which would be impossible because of the size of the problem, one can linearize about the 3-D model achieved in the inverse and use Monte-Carlo simulations to construct it. Using these appraisal and construction tools, it is now necessary to demonstrate 3-D inversion for a variety of EM data sets that span the frequency range from induction sounding to radar: below 100 kHz to 100 MHz. Appraised 3-D images of the earth`s electrical properties can provide researchers opportunities to infer the flow paths, flow rates and perhaps the chemistry of fluids in geologic mediums. It also offers a means to study the frequency dependence behavior of the properties in situ. This is of significant relevance to the Department of Energy, paramount to characterizing and monitoring of environmental waste sites and oil and gas exploration.

Newman, G.A.; Alumbaugh, D.L. [Sandia National Labs., Albuquerque, NM (United States). Geophysics Dept.

1996-03-01T23:59:59.000Z

294

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

SciTech Connect (OSTI)

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.

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

2009-01-01T23:59:59.000Z

295

Interlocked optimization and fast gradient algorithm for a seismic inverse problem  

SciTech Connect (OSTI)

Highlights: {yields} A 2D extension of the 1D nonlinear inversion of well-seismic data is given. {yields} Appropriate regularization yields a well-determined large scale inverse problem. {yields} An interlocked optimization loop acts as an efficient preconditioner. {yields} The adjoint state method is used to compute the misfit function gradient. {yields} Domain decomposition method yields an efficient parallel implementation. - Abstract: We give a nonlinear inverse method for seismic data recorded in a well from sources at several offsets from the borehole in a 2D acoustic framework. Given the velocity field, approximate values of the impedance are recovered. This is a 2D extension of the 1D inversion of vertical seismic profiles . The inverse problem generates a large scale undetermined ill-conditioned problem. Appropriate regularization terms render the problem well-determined. An interlocked optimization algorithm yields an efficient preconditioning. A gradient algorithm based on the adjoint state method and domain decomposition gives a fast parallel numerical method. For a realistic test case, convergence is attained in an acceptable time with 128 processors.

Metivier, Ludovic, E-mail: ludovic.metivier@gmail.com [LAGA, Universite Paris XIII, 99 Avenue Jean-Baptiste Clement, 93000 Epinay-Villetaneuse (France)

2011-08-10T23:59:59.000Z

296

1 Copyright 2009 by ASME Proceedings of the ASME 2009 International Design Engineering Technical Conferences &  

E-Print Network [OSTI]

1 Copyright © 2009 by ASME Proceedings of the ASME 2009 International Design Engineering Technical of the power of computers (as PCs were on the rise) to solve linear equations via standard matrix methods;2 Copyright © 2009 by ASME 2. FOUR-BAR MECHANISM INVERSE DYNAMICS MATRIX METHOD For each moving link we can

Williams II, Robert L.

297

Design Editorial A Design Societies Federation  

E-Print Network [OSTI]

Journal of Mechanical Design Editorial A Design Societies Federation You can recognize the many faces of design by looking at the many different professional societies that promote design around the world. These societies may have roots in engineering or archi- tecture or industrial design but they all

Papalambros, Panos

298

A GOODNESS-OF-FIT TEST FOR THE INVERSE GAUSSIAN DISTRIBUTION BASED ON THE MATSUMOTO-YOR PROPERTY  

E-Print Network [OSTI]

A GOODNESS-OF-FIT TEST FOR THE INVERSE GAUSSIAN DISTRIBUTION BASED ON THE MATSUMOTO-YOR PROPERTY-of-fit test for the inverse Gaussian distribution. Résumé : Soient X et Y des variables aléatoires positives utilisons cette pro- priété pour proposer un test d'adéquation pour la loi gaussienne inverse. Keywords

Boyer, Edmond

299

Expectation propagation for nonlinear inverse problems – with an application to electrical impedance tomography  

SciTech Connect (OSTI)

In this paper, we study a fast approximate inference method based on expectation propagation for exploring the posterior probability distribution arising from the Bayesian formulation of nonlinear inverse problems. It is capable of efficiently delivering reliable estimates of the posterior mean and covariance, thereby providing an inverse solution together with quantified uncertainties. Some theoretical properties of the iterative algorithm are discussed, and the efficient implementation for an important class of problems of projection type is described. The method is illustrated with one typical nonlinear inverse problem, electrical impedance tomography with complete electrode model, under sparsity constraints. Numerical results for real experimental data are presented, and compared with that by Markov chain Monte Carlo. The results indicate that the method is accurate and computationally very efficient.

Gehre, Matthias, E-mail: mgehre@math.uni-bremen.de [Center for Industrial Mathematics, University of Bremen, Bremen D-28344 (Germany)] [Center for Industrial Mathematics, University of Bremen, Bremen D-28344 (Germany); Jin, Bangti, E-mail: bangti.jin@gmail.com [Department of Mathematics, University of California, Riverside, University Ave. 900, Riverside, CA 92521 (United States)] [Department of Mathematics, University of California, Riverside, University Ave. 900, Riverside, CA 92521 (United States)

2014-02-15T23:59:59.000Z

300

Experimental validation of GADRAS's coupled neutron-photon inverse radiation transport solver.  

SciTech Connect (OSTI)

Sandia National Laboratories has developed an inverse radiation transport solver that applies nonlinear regression to coupled neutron-photon deterministic transport models. The inverse solver uses nonlinear regression to fit a radiation transport model to gamma spectrometry and neutron multiplicity counting measurements. The subject of this paper is the experimental validation of that solver. This paper describes a series of experiments conducted with a 4.5 kg sphere of {alpha}-phase, weapons-grade plutonium. The source was measured bare and reflected by high-density polyethylene (HDPE) spherical shells with total thicknesses between 1.27 and 15.24 cm. Neutron and photon emissions from the source were measured using three instruments: a gross neutron counter, a portable neutron multiplicity counter, and a high-resolution gamma spectrometer. These measurements were used as input to the inverse radiation transport solver to evaluate the solver's ability to correctly infer the configuration of the source from its measured radiation signatures.

Mattingly, John K.; Mitchell, Dean James; Harding, Lee T.

2010-08-01T23:59:59.000Z

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


301

Statistic inversion of multi-zone transition probability models for aquifer characterization in alluvial fans  

E-Print Network [OSTI]

Understanding the heterogeneity arising from the complex architecture of sedimentary sequences in alluvial fans is challenging. This paper develops a statistical inverse framework in a multi-zone transition probability approach for characterizing the heterogeneity in alluvial fans. An analytical solution of the transition probability matrix is used to define the statistical relationships among different hydrofacies and their mean lengths, integral scales, and volumetric proportions. A statistical inversion is conducted to identify the multi-zone transition probability models and estimate the optimal statistical parameters using the modified Gauss-Newton-Levenberg-Marquardt method. The Jacobian matrix is computed by the sensitivity equation method, which results in an accurate inverse solution with quantification of parameter uncertainty. We use the Chaobai River alluvial fan in the Beijing Plain, China, as an example for elucidating the methodology of alluvial fan characterization. The alluvial fan is divided...

Zhu, Lin; Gong, Huili; Gable, Carl; Teatini, Pietro

2015-01-01T23:59:59.000Z

302

Structure of the murine constitutive androstane receptor complexed to androstenol: a molecular basis for inverse agonism  

SciTech Connect (OSTI)

The nuclear receptor CAR is a xenobiotic responsive transcription factor that plays a central role in the clearance of drugs and bilirubin while promoting cocaine and acetaminophen toxicity. In addition, CAR has established a 'reverse' paradigm of nuclear receptor action where the receptor is active in the absence of ligand and inactive when bound to inverse agonists. We now report the crystal structure of murine CAR bound to the inverse agonist androstenol. Androstenol binds within the ligand binding pocket, but unlike many nuclear receptor ligands, it makes no contacts with helix H12/AF2. The transition from constitutive to basal activity (androstenol bound) appears to be associated with a ligand-induced kink between helices H10 and H11. This disrupts the previously predicted salt bridge that locks H12 in the transcriptionally active conformation. This mechanism of inverse agonism is distinct from traditional nuclear receptor antagonists thereby offering a new approach to receptor modulation.

Shan, L.; Vincent, J.; Brunzelle, J.S.; Dussault, I.; Lin, M.; Ianculescu, I.; Sherman, M.A.; Forman, B.M.; Fernandez, E. (Tennesse)

2010-03-08T23:59:59.000Z

303

TIME-LAPSE MODELING AND INVERSION OF CO2 SATURATION FOR SEQUESTRATION AND ENHANCED OIL RECOVERY  

SciTech Connect (OSTI)

In the fifth quarter of this DOE NETL project, they have implemented an algorithm that inverts for changes in fluid properties over time using time-lapse seismic anomalies. This algorithm constitutes the second step in the inversion procedure for Phase III of the project. They demonstrate this inversion procedure with a synthetic data example. Additional activities in this reporting period include a trip by the Principal investigator to an International Monitoring Workshop sponsored by the IEA Greenhouse Gas R and D Program in Santa Cruz, California. In the next quarter, they will further process the Sleipner data to prepare it for later inversion, and continue investigating alternative methods for calculating properties of oil/brine/CO{sub 2} systems.

Mark A. Meadows

2005-02-18T23:59:59.000Z

304

High-Power Laser Pulse Recirculation for Inverse Compton Scattering-Produced Gamma-Rays  

SciTech Connect (OSTI)

Inverse Compton scattering of high-power laser pulses on relativistic electron bunches represents an attractive method for high-brightness, quasi-monoenergetic {gamma}-ray production. The efficiency of {gamma}-ray generation via inverse Compton scattering is severely constrained by the small Thomson scattering cross section. Furthermore, repetition rates of high-energy short-pulse lasers are poorly matched with those available from electron accelerators, resulting in low repetition rates for generated {gamma}-rays. Laser recirculation has been proposed as a method to address those limitations, but has been limited to only small pulse energies and peak powers. Here we propose and experimentally demonstrate an alternative method for laser pulse recirculation that is uniquely capable of recirculating short pulses with energies exceeding 1 J. Inverse Compton scattering of recirculated Joule-level laser pulses has a potential to produce unprecedented peak and average {gamma}-ray brightness in the next generation of sources.

Jovanovic, I; Shverdin, M; Gibson, D; Brown, C

2007-04-17T23:59:59.000Z

305

SREELS analysis of oxygen-rich inversion domain boundaries in aluminum nitride  

SciTech Connect (OSTI)

Spatially resolved electron energy loss spectroscopy analysis has been conducted on planar inversion domain boundaries in aluminum nitride. The defects were found to contain 1.5 monolayers of oxygen, in agreement with the most recent structural model of Westwood. From variations in near-edge structure, the local atomic environments of both oxygen and aluminum are compared with {alpha}-Al{sub 2}O{sub 3}, {gamma}-Al{sub 2}O{sub 3} and {gamma}-AlON standards. Based upon this study the structure of the inversion domain boundary is found to resemble that of the cubic {gamma}-AlON spinel, and eliminates from consideration those structural models based upon {alpha}-Al{sub 2}O{sub 3}. Furthermore, quantification of the shape resonances provided Al-O bond-length data from the inversion domain boundary interface. These distances closely agree with the Youngman Model that has recently been further refined by Westwood et al.

Bruley, J.; Zhao, J.C.; Notis, M.R. [Lehigh Univ. Bethlehem, PA (United States). Dept. of Materials Science and Engineering; Westwood, A.D. [IBM T.J. Watson Research Center, Yorktown Heights, NY (United States); Youngman, R.A. [Carborundum Co., Phoenix, AZ (United States)

1995-09-01T23:59:59.000Z

306

Water vapor and temperature inversions near the 0 deg C level over the tropical western Pacific. Master's thesis  

SciTech Connect (OSTI)

During the Intensive Observation Period (IOP), several periods of water vapor and temperature inversions near the 0 deg C level were observed. Satellite and radiosonde data from TOGA COARE are used to document the large-scale conditions and thermodynamic and kinematic structures present during three extended periods in which moisture and temperature inversions near the freezing level were very pronounced. Observations from each case are synthesized into schematics which represent typical structures of the inversion phenomena. Frequency distributions of the inversion phenomena along with climatological humidity and temperature profiles are calculated for the four-month IOP.

Hart, K.A.

1994-01-01T23:59:59.000Z

307

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

E-Print Network [OSTI]

??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… (more)

Adamski, Mark Robert

2012-01-01T23:59:59.000Z

308

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)

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.

Chen, J.; Hoversten, G.M.

2011-09-15T23:59:59.000Z

309

Analysis of forward and inverse problems in chemical dynamics and spectroscopy  

SciTech Connect (OSTI)

The overall scope of this research concerns the development and application of forward and inverse analysis tools for problems in chemical dynamics and chemical kinetics. The chemical dynamics work is specifically associated with relating features in potential surfaces and resultant dynamical behavior. The analogous inverse research aims to provide stable algorithms for extracting potential surfaces from laboratory data. In the case of chemical kinetics, the focus is on the development of systematic means to reduce the complexity of chemical kinetic models. Recent progress in these directions is summarized below.

Rabitz, H. [Princeton Univ., NJ (United States)

1993-12-01T23:59:59.000Z

310

Numerical solution of 2-D nonlinear inverse heat conduction problems using finite-element techniques  

SciTech Connect (OSTI)

A general method is presented for solving different classes of nonlinear inverse heat conduction problems (IHCP) for two-dimensional, arbitrarily shaped bodies. It is based on the systematic use of a finite-element library. It is shown that, following this approach, the conjugate gradient method can be easily implemented. The method offers a very wide field of practical applications in inverse thermal analysis, while reducing very significantly the amount of work which remains specific for each particular IHPC. Two numerical experiments illustrate the influence of data errors and the iterative regularization principle.

Khachfe, R.A.; Jarny, Y.

2000-02-01T23:59:59.000Z

311

Inverse scattering transform for the focusing nonlinear Schrödinger equation with nonzero boundary conditions  

SciTech Connect (OSTI)

The inverse scattering transform for the focusing nonlinear Schrödinger equation with non-zero boundary conditions at infinity is presented, including the determination of the analyticity of the scattering eigenfunctions, the introduction of the appropriate Riemann surface and uniformization variable, the symmetries, discrete spectrum, asymptotics, trace formulae and the so-called theta condition, and the formulation of the inverse problem in terms of a Riemann-Hilbert problem. In addition, the general behavior of the soliton solutions is discussed, as well as the reductions to all special cases previously discussed in the literature.

Biondini, Gino [Department of Mathematics, State University of New York at Buffalo, Buffalo, New York 14260 (United States)] [Department of Mathematics, State University of New York at Buffalo, Buffalo, New York 14260 (United States); Kova?i?, Gregor [Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)] [Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)

2014-03-15T23:59:59.000Z

312

Inverse scattering series for multiple attenuation: An example with surface and internal multiples  

SciTech Connect (OSTI)

A multiple attenuation method derived from an inverse scattering series is described. The inversion series approach allows a separation of multiple attenuation subseries from the full series. The surface multiple attenuation subseries was described and illustrated in Carvalho et al. (1991, 1992). The internal multiple attenuation method consists of selecting the parts of the odd terms that are associated with removing only multiply reflected energy. The method, for both types of multiples, is multidimensional and does not rely on periodicity or differential moveout, nor does it require a model of the reflectors generating the multiples. An example with internal and surface multiples will be presented.

Araujo, F.V. [PPPG/Federal Univ. of Bahia, Salvador (Brazil); Weglein, A.B. [Schlumberger Cambridge Research (United Kingdom); Carvalho, P.M. [Petrobras SA, Rio de Janeiro (Brazil); Stolt, R.H.

1994-12-31T23:59:59.000Z

313

Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale  

E-Print Network [OSTI]

We conducted three torsion-balance experiments to test the gravitational inverse-square law at separations between 9.53 mm and 55 micrometers, probing distances less than the dark-energy length scale $\\lambda_{\\rm d}=\\sqrt[4]{\\hbar c/\\rho_{\\rm d}}\\approx 85 \\mu$m. We find with 95% confidence that the inverse-square law holds ($|\\alpha| \\leq 1$) down to a length scale $\\lambda = 56 \\mu$m and that an extra dimension must have a size $R \\leq 44 \\mu$m.

D. J. Kapner; T. S. Cook; E. G. Adelberger; J. H. Gundlach; B. R. Heckel; C. D. Hoyle; H. E. Swanson

2006-11-14T23:59:59.000Z

314

Final Report: Detection and Characterization of Underground Facilities by Stochastic Inversion and Modeling of Data from the New Generation of Synthetic Aperture Satellites  

SciTech Connect (OSTI)

Many clandestine development and production activities can be conducted underground to evade surveillance. The purpose of the study reported here was to develop a technique to detect underground facilities by broad-area search and then to characterize the facilities by inversion of the collected data. This would enable constraints to be placed on the types of activities that would be feasible at each underground site, providing a basis the design of targeted surveillance and analysis for more complete characterization. Excavation of underground cavities causes deformation in the host material and overburden that produces displacements at the ground surface. Such displacements are often measurable by a variety of surveying or geodetic techniques. One measurement technique, Interferometric Synthetic Aperture Radar (InSAR), uses data from satellite-borne (or airborne) synthetic aperture radars (SARs) and so is ideal for detecting and measuring surface displacements in denied access regions. Depending on the radar frequency and the acquisition mode and the surface conditions, displacement maps derived from SAR interferograms can provide millimeter- to centimeter-level measurement accuracy on regional and local scales at spatial resolution of {approx}1-10 m. Relatively low-resolution ({approx}20 m, say) maps covering large regions can be used for broad-area detection, while finer resolutions ({approx}1 m) can be used to image details of displacement fields over targeted small areas. Surface displacements are generally expected to be largest during or a relatively short time after active excavation, but, depending on the material properties, measurable displacement may continue at a decreasing rate for a considerable time after completion. For a given excavated volume in a given geological setting, the amplitude of the surface displacements decreases as the depth of excavation increases, while the area of the discernable displacement pattern increases. Therefore, the ability to detect evidence for an underground facility using InSAR depends on the displacement sensitivity and spatial resolution of the interferogram, as well as on the size and depth of the facility and the time since its completion. The methodology development described in this report focuses on the exploitation of synthetic aperture radar data that are available commercially from a number of satellite missions. Development of the method involves three components: (1) Evaluation of the capability of InSAR to detect and characterize underground facilities ; (2) inversion of InSAR data to infer the location, depth, shape and volume of a subsurface facility; and (3) evaluation and selection of suitable geomechanical forward models to use in the inversion. We adapted LLNL's general-purpose Bayesian Markov Chain-Monte Carlo procedure, the 'Stochastic Engine' (SE), to carry out inversions to characterize subsurface void geometries. The SE performs forward simulations for a large number of trial source models to identify the set of models that are consistent with the observations and prior constraints. The inverse solution produced by this kind of stochastic method is a posterior probability density function (pdf) over alternative models, which forms an appropriate input to risk-based decision analyses to evaluate subsequent response strategies. One major advantage of a stochastic inversion approach is its ability to deal with complex, non-linear forward models employing empirical, analytical or numerical methods. However, while a geomechanical model must incorporate adequate physics to enable sufficiently accurate prediction of surface displacements, it must also be computationally fast enough to render the large number of forward realizations needed in stochastic inversion feasible. This latter requirement prompted us first to investigate computationally efficient empirical relations and closed-form analytical solutions. However, our evaluation revealed severe limitations in the ability of existing empirical and analytical forms to predict deformations from undergro

Foxall, W; Cunningham, C; Mellors, R; Templeton, D; Dyer, K; White, J

2012-02-27T23:59:59.000Z

315

The Phase Inversion-based Coal-CO? Slurry (PHICCOS) feeding system : design, coupled multiscale analysis, and technoeconomic assessment  

E-Print Network [OSTI]

The continuous conveying of a solid feedstock like pulverized coal into a pressurized environment is a challenging task required in multiple industrial processes. Plants based on pressurized, entrained-flow gasifiers (EFG) ...

Botero, Cristina, Ph. D. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

316

Design of a 20MHz Transimpedance Low-pass Filter with an Adapted 3rd Order Inverse Chebyshev Response  

E-Print Network [OSTI]

filter ................................................................................... 10 Figure 5 Input impedance of first-order TIA .................................................................... 11 Figure 6 Input impedance function for P1

Boakye, Emmanuel

2012-10-19T23:59:59.000Z

317

Design wiki: a system for design sharing  

E-Print Network [OSTI]

Design wiki: a system for design sharing Wael A. Abdelhameed, Yoshihiro Kobayashi #12;Wael of Bahrain. His research areas are 3D Modeling Systems, Computing Architecture, Virtual Reality, Design Process, Visual Design Thinking and Digital and Manual Media Interaction. Yoshihiro Kobayashi is a Faculty

318

Institute of Design Institute of Design  

E-Print Network [OSTI]

Institute of Design Institute of Design 350 N. LaSalle St. Chicago, IL 60610 312.595.4900 main 312.595.4906 graduate study information 312.595.4901 fax design@id.iit.edu www.id.iit.edu Dean: Patrick F. Whitney The Institute of Design (ID) is defined by a legacy of experimentation joined with unique academic programs

Heller, Barbara

319

College of Design ID Interior Design  

E-Print Network [OSTI]

College of Design ID Interior Design KEY: # = new course * = course changed = course dropped University of Kentucky 2013-2014 Undergraduate Bulletin 1 ID 101 INTRODUCTION TO INTERIOR DESIGN. (1) An introduction to the profession of Interior Design: historical perspective, career specializations, and career

MacAdam, Keith

320

Design Editorial Design: The New Frontier  

E-Print Network [OSTI]

Journal of Mechanical Design Editorial Design: The New Frontier An increasingly well to 2009 NAE Inductee Class, http://www.nae.edu/18185.aspx . This linking is the new frontier for sustainable growth and innovation, and design is the surest path to realizing it. Design is the new frontier

Papalambros, Panos

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


321

Inverse Beta Decay in a Nonequilibrium Antineutrino Flux from a Nuclear Reactor  

E-Print Network [OSTI]

The evolution of the reactor antineutrino spectrum toward equilibrium above the inverse beta-decay threshold during the reactor operating period and the decay of residual antineutrino radiation after reactor shutdown are considered. It is found that, under certain conditions, these processes can play a significant role in experiments seeking neutrino oscillations.

V. I. Kopeikin; L. A. Mikaelyan; V. V. Sinev

2001-10-23T23:59:59.000Z

322

Structural fabric of the Palisades Monocline: a study of positive inversion, Grand Canyon, Arizona  

E-Print Network [OSTI]

: __________________________ __________________________ Judith S. Chester Brann Johnson (Chair of Committee) (Member) __________________________ __________________________ William Sager Rick... Cory Orofino, B.A., The Colorado College Chair of Advisory Committee: Dr. Judith S. Chester A field study of positive inversion is conducted to describe associated structural fabrics and to infer kinematic development of the Palisades...

Orofino, James Cory

2005-08-29T23:59:59.000Z

323

Topological insulators with inversion symmetry Liang Fu and C. L. Kane  

E-Print Network [OSTI]

Topological insulators with inversion symmetry Liang Fu and C. L. Kane Department of Physics; revised manuscript received 17 January 2007; published 2 July 2007 Topological insulators are materials insulators. This distinction is characterized by Z2 topological invariants, which characterize the ground

Kane, Charles

324

Inverse modeling of surface emissions for local pollution: A new methodology applied to academic test cases  

E-Print Network [OSTI]

Inverse modeling of surface emissions for local pollution: A new methodology applied to academic; (2) LISA Creteil France Needs: Optimize surface emissions using daily recorded ozone and NOX by PRIMEQUAL2, program of the french ministry of environment Firstguess emissions inventory for the Paris

Menut, Laurent

325

Market making with an inverse Kelly strategy E. Noon* and W. Knottenbelt**  

E-Print Network [OSTI]

229 Market making with an inverse Kelly strategy E. Noon* and W. Knottenbelt** *Imperial College Kensington Campus, London, SW7 2AZ. wjk@doc.ic.ac.uk Abstract. Kelly's celebrated staking system calculates the optimal fraction of wealth to bet on each of a series of favourable bets. We previously extended Kelly

Knottenbelt, William J.

326

A comparison of land surface model soil hydraulic properties estimated by inverse modeling and  

E-Print Network [OSTI]

of water in the soil. This in turn plays an important role in the water and energy cycles at the land depths in the soil column controls the partitioning of two key energy fluxes of concern in climate modelsA comparison of land surface model soil hydraulic properties estimated by inverse modeling

Small, Eric

327

Coding into a source: an inverse rate-distortion Anant Sahai  

E-Print Network [OSTI]

Sahai (UC Berkeley) Inverse Rate Distortion Sep 27, 2006 1 / 27 #12;Suppose the aliens landed. . . Your Distortion Sep 27, 2006 2 / 27 #12;Suppose the aliens landed. . . Your mission: reverse 27, 2006 2 / 27 #12;Suppose the aliens landed. . . Your mission: reverse

Sahai, Anant

328

Limitations of polynomial chaos expansions in the Bayesian solution of inverse problems  

E-Print Network [OSTI]

expensive, especially in high-dimensional problems. Polynomial chaos expansions (PCE) and generalized PCE,14,20,29]) which can be used to reduce the cost of Bayesian inverse problems [2,16­18,21]. The PCE leads), the surrogate posterior can be very different from the posterior and PCE-based sampling is either inaccurate

Chorin, Alexandre J.

329

J. Geomag. Geoelectr., 45, 985999, 1993 Occam's Inversion and the North American  

E-Print Network [OSTI]

Electrical Anomaly Catherine deGroot-Hedlin and Steven Constable Institute of Geophysics and PlanetaryGroot-Hedlin and Steven Constable anomaly may be interpreted as a two-dimensional (2D) feature to a first approximation) using the Occam's inversion algorithm of Constable, Parker and Constable (1987), modified for 2D MT

Constable, Steve

330

1 Estimating aquifer hydraulic properties from the inversion of surface 2 Streaming Potential (SP) anomalies  

E-Print Network [OSTI]

1 Estimating aquifer hydraulic properties from the inversion of surface 2 Streaming Potential (SP with the geometry of the water table. It follows that 11 SP measurements can be used to estimate aquifer hydraulic and found that we 14 are able to estimate the hydraulic conductivity and the depth 15 and the thickness

Sailhac, Pascal

331

Volume Currents in Forward and Inverse Magnetoencephalographic Simulations Using Realistic Head Models  

E-Print Network [OSTI]

Volume Currents in Forward and Inverse Magnetoencephalographic Simulations Using Realistic Head of magnetoencephalographic MEG forward or in- verse simulations in realistic head models. We verify the accu- racy of our, in an inhomoge- neous, nonspherical realistic head model, the magnetic field normal to the MEG detector due

Utah, University of

332

Stationary IPA Estimates for Non-Smooth G/G/1/ Functionals via Palm Inversion and  

E-Print Network [OSTI]

Stationary IPA Estimates for Non-Smooth G/G/1/ Functionals via Palm Inversion and Level, the derivative of J with respect to . To this end, we use Infinitesimal Perturbation Analysis (IPA), a method on IPA. Alternative methods have been used to estimate derivatives, namely Smooth Perturbation Analysis

Paris-Sud XI, Université de

333

Bayesian analysis of the scatterometer wind retrieval inverse problem: some new approaches  

E-Print Network [OSTI]

the solution of this inverse problem. We apply our methods to both data assimilation, where we have, Birmingham B4 7ET, UK Summary. The retrieval of wind vectors from satellite scatterometers is a non the size of the data set can become prohibitively large. We contrast the sampling results

334

Inexact range-space Krylov solvers for linear systems arising from inverse problems  

E-Print Network [OSTI]

is crucial in data assimilation appli- cations and other inverse problems. Secondly, it is shown.1) and methods of the type we just men- tioned finds its origin in (but is not limited by) the data assimilation. Keywords: Krylov methods, linear systems, inexact matrix products, data assimila- tion. 1 Introduction

Toint, Philippe

335

Inverse-synthetic-aperture imaging of trees over a ground plane  

SciTech Connect (OSTI)

Recent data collections with the Sandia VHF-UHF synthetic-aperture radar have yielded surprising results; trees appear brighter in the images than expected! In an effort to understand this phenomenon, various small trees have been measured on the Sandia folded compact range with the inverse-synthetic-aperture imaging system. A compilation of these measurements is contained in this report.

Zittel, D.H.; Brock, B.C.; Littlejohn, J.H.; Patitz, W.E.

1995-11-01T23:59:59.000Z

336

Inverse Problems in Science and Engineering Vol. 00, No. 00, July 2004, 125  

E-Print Network [OSTI]

of the solar Bremsstrahlung inverse problem: model dependence and implementation issues A.M.Massone M problem in solar plasma physics by means of an `ad hoc' imple- mentation of the Tikhonov regularization, an application to a real observationrecorded by the NASA mission 'Reuven Ramaty High Energy Solar Spectroscopic

Piana, Michele

337

Inverse Problems in Transport and Diffusion Theory with Applications in Optical Tomography  

E-Print Network [OSTI]

problem related to the scattering-free atmospheric radiative transport equation. The inverse problem aims the coefficient and the source term of the transport equation) from wavenumber-dependent boundary radiation transport equation as the forward model of light propagation in tissues. We show by numerical examples

Ren, Kui

338

An accurate solver for forward and inverse transport. Francois Monard and Guillaume Bal  

E-Print Network [OSTI]

(radiative transfer) equations numerically. Our main objective is to address the inverse transport problem theory. 1 Introduction The radiative transfer (linear Boltzmann or linear transport) equation finds. Although the methodology might not be the fastest way to solve transport equations, its physical accuracy

Bal, Guillaume

339

An inverse correlation between loop length and stability in a four-helix-bundle protein  

E-Print Network [OSTI]

their intrinsic func- tionality upon their new environmental context: the calcium-binding activity of a loop has the molten globule behavior of apo- - lactalbumin in the absence of calcium [18]. Conversely, loops have beenAn inverse correlation between loop length and stability in a four-helix-bundle protein Athena D

Mochrie, Simon

340

Experimental Measurement of Lateral Transport in the Inversion Layer of Silicon Heterojunction Solar Cells  

E-Print Network [OSTI]

]. Furthermore, the a-Si:H emitter and back surface field depositions are performed at low temperatures, which-type emitter configuration that is commonly used, the c-Si/a-Si:H heterointerface presents a valence band in the inversion layer. II. EXPERIMENTAL The experimental structure used was a SHJ emitter, in which an intrinsic a-Si:H

Atwater, Harry

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


341

Rheology of welding: inversion of field constraints James K. Russell*, Steven L. Quane  

E-Print Network [OSTI]

Rheology of welding: inversion of field constraints James K. Russell*, Steven L. Quane Igneous the mechanisms and rheological behaviour of pyroclastic deposits during welding and compaction are poorly are constrained by physical property distributions in welded ignimbrite. Physical properties of samples from a 20

Russell, Kelly

342

Quantification of Nanoscale Density Fluctuations in Biological Cells/Tissues: Inverse Participation Ratio (IPR) Analysis of  

E-Print Network [OSTI]

Ratio (IPR) Analysis of Transmission Electron Microscopy Images and Implications for Early-Stage Cancer analysis of the inverse participation ratio (IPR) of the eigenfunctions of these optical lattices at the nanoscales. First, the IPR analysis is validated in experiments with models of disordered systems fabricated

Pradhan, Prabhakar

343

Inverse Modeling Using a Wireless Sensor Network (WSN) for Personalized Daylight Harvesting  

E-Print Network [OSTI]

Inverse Modeling Using a Wireless Sensor Network (WSN) for Personalized Daylight Harvesting Ryan: predictive: daylight harvesting: piecewise linear regression: building energy efficiency Abstract: Smart light levels, discretized by sub-hourly sun angles. Applied on two days of daylight and ten days

Agogino, Alice M.

344

Mapping microphytobenthos biomass by non-linear inversion of visible-infrared hyperspectral images  

E-Print Network [OSTI]

- 1 - Mapping microphytobenthos biomass by non-linear inversion of visible-infrared hyperspectral-Philippe.Combe@chimie.univ-nantes.fr Abstract This study presents an innovative approach to map microphytobenthos biomass and fractional cover to microscale intimate mixtures. This prevents the use of classical linear unmixing models to retrieve biomass

Combe, Jean-Philippe

345

The $B-L$ Supersymmetric Standard Model with Inverse Seesaw at the Large Hadron Collider  

E-Print Network [OSTI]

We review the TeV scale $B-L$ extension of the Minimal Supersymmetric Standard Model (BLSSM) where an inverse seesaw mechanism of light neutrino mass generation is naturally implemented and concentrate on its hallmark manifestations at the Large Hadron Collider (LHC).

Khalil, S

2015-01-01T23:59:59.000Z

346

An inversion formula for transport equation in 3-dimensions using several complex variable analysis  

E-Print Network [OSTI]

In this paper, the photon stationary transport equation has been extended from $\\mathbb{R}^3$ to $\\mathbb{C}^3$. A solution of the inverse problem is obtained on a hyper-sphere and a hyper-cylinder as X-ray and Radon transform, respectively. We show that these results can be transformed into each other and they agree with known results.

Seyed Majid Saberi Fathi

2015-03-18T23:59:59.000Z

347

Durability Assessment of an Arch Dam using Inverse Analysis with Neural Networks and High Performance Computing.  

E-Print Network [OSTI]

the viscoelastic parameters; 3D FEM analysis using High Performance Computing (parallel and vector features) to run Performance Computing. E. M. R. Fairbairn, E. Goulart, A. L. G. A. Coutinho, N. F. F. Ebecken COPPEDurability Assessment of an Arch Dam using Inverse Analysis with Neural Networks and High

Coutinho, Alvaro L. G. A.

348

Asking for Help Using Inverse Semantics Author Names Omitted for Anonymous Review. Paper-ID 69  

E-Print Network [OSTI]

Asking for Help Using Inverse Semantics Author Names Omitted for Anonymous Review. Paper-ID 69 an approach for enabling a robot to recover from failures by communicating its need for specific help targeted spoken-language requests for help such as "Please give me the white table leg that is on the black

Tellex, Stefanie

349

Late-to Post-Cretaceous Inversion of the British Isles Tectonic Stylolites at Flamborough Head  

E-Print Network [OSTI]

not much is known about younger inversion events in the UK. Industrial: A lot of the oil and gas traps. Geology 36(11), 839-842. Koehn, D., Renard, F., Toussaint, R., Passchier, C.W. (2007) Growth of stylolite at Flamborough Head, U.K. Journal of Structural Geology 16, 97-107. Application procedure and deadlines

Guo, Zaoyang

350

Concrete calcium leaching at variable temperature: experimental data and numerical model inverse  

E-Print Network [OSTI]

, concrete porous solution is very basic (pH around 13) and several ionic species are highly concentrated [1Concrete calcium leaching at variable temperature: experimental data and numerical model inverse/DSU/SSIAD/BERIS, Fontenay-aux-Roses, France Abstract A simplified model for calcium leaching in concrete is presented

Paris-Sud XI, Université de

351

The "Inverse CSI Effect": Evidence from E-crime Data Richard E Overill  

E-Print Network [OSTI]

reported that in a private conversation in July 2011 Lord Justice Leveson claimed to have coined the term Effect" which ex- amines how an actual or potential criminal might be expected to react to the CSI Effect of cyber-criminals. If the proposed Inverse CSI Effect were indeed operative in the cyber domain, causing

Overill, Richard E.

352

Inverse Modeling and Animation of Growing Single-stemmed Trees at Interactive Rates  

E-Print Network [OSTI]

residents. Benefits include energy savings, air pol- lutant uptake, CO2 sequestration, storm-water runoffInverse Modeling and Animation of Growing Single-stemmed Trees at Interactive Rates Steffen Rudnick Service, Pacific Southwest Research Station Center for Urban Forest Research, Davis, California ABSTRACT

Linsen, Lars

353

Computer Physics Communications 66(1991) 243-258 Function parametrization: a fast inverse mapping method  

E-Print Network [OSTI]

1 Computer Physics Communications 66(1991) 243-258 Function parametrization: a fast inverse mapping (FP) is a method to invert computer models that map physical parameters describing the state that requires little computing time to evaluate. The major advantages of FP over other analysis methods are

van Milligen, Boudewijn

354

The Ice Cream Cone Model for Inversing Geometrical Properties of Halo Coronal Mass Ejections  

E-Print Network [OSTI]

the front half ellipse produced by the cone part when the angle of the central axis of the ice cream coneThe Ice Cream Cone Model for Inversing Geometrical Properties of Halo Coronal Mass Ejections Xue Pu recently that most of halo coronal mass ejections (CMEs) may be formed by an ice cream cone-like shell

Zhao, Xuepu

355

6.6 Solute Transport During Variably Saturated Flow--Inverse Methods  

E-Print Network [OSTI]

6.6 Solute Transport During Variably Saturated Flow-- Inverse Methods JI�Í SIMæNEK AND MARTINUS TH.6.2). In separate lines of research, solute transport parameters are often obtained from column experiments assuming curves. Obtaining solute transport pa- rameters for conditions for which no analytical solutions exist

Flury, Markus

356

Seismic Velocity Inversion with Genetic Algorithms Sushil J. Louis Qinxue Chen  

E-Print Network [OSTI]

Seismic Velocity Inversion with Genetic Algorithms Sushil J. Louis Qinxue Chen Genetic Adaptive­surface models from seismic travel­time data. Given a sub­surface model, the physics of wave propagation through refractive media can be used to compute travel times for seismic waves. How­ ever, in practice, we have

Louis, Sushil J.

357

ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT,  

E-Print Network [OSTI]

ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT, POSTLE of the CO2 flood performance at Postle field. The use of traditional P-wave reflectivity data correlate to the roll-out of the CO2 flood program from south to north. When interpreted in conjunction

358

COMPRESSIVE INVERSE SCATTERING I. HIGH FREQUENCY SIMO/MISO AND MIMO MEASUREMENTS  

E-Print Network [OSTI]

COMPRESSIVE INVERSE SCATTERING I. HIGH FREQUENCY SIMO/MISO AND MIMO MEASUREMENTS ALBERT C), multiple-input-single-output (MISO) or multiple-input-multiple-output (MIMO) measurements is analyzed of the data either with the MIMO measurement for the Born scattering or with the SIMO/MISO measurement

Fannjiang, Albert

359

NREL experiments show that disordered inverse opals significantly scatter and trap near-infrared light, with  

E-Print Network [OSTI]

NREL experiments show that disordered inverse opals significantly scatter and trap near-infrared wavelengths in the near-infrared (NIR), which is important to a number of technologies. This discovery.neale@nrel.gov Reference: N.R. Neale, B.G. Lee, S.H. Kang, and A.J. Frank."Near-Infrared Light Trapping in Disordered

360

Particle Physics Implications of a Recent Test of the Gravitational Inverse Square Law  

E-Print Network [OSTI]

We use data from our recent search for violations of the gravitational inverse-square law to constrain dilaton, radion and chameleon exchange forces as well as arbitrary vector or scalar interactions. We test the interpretation of the PVLAS effect and a conjectured ``fat graviton'' scenario and constrain the $\\gamma_5$ couplings of pseuodscalar bosons and arbitrary power-law interactions.

E. G. Adelberger; B. R. Heckel; S. Hoedl; C. D. Hoyle; D. J. Kapner; A. Upadhye

2007-02-07T23:59:59.000Z

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


361

Hysteresis Modeling and Inverse Feedforward Control of an AFM Piezoelectric Scanner Based on Nano Images  

E-Print Network [OSTI]

Hysteresis Modeling and Inverse Feedforward Control of an AFM Piezoelectric Scanner Based on Nano of micro/nano technology. As a critical part of AFM system, the piezoelectric scanner exists many defects in this paper possess a good performance for AFM nano imaging. Index Terms-- Hysteresis modeling, feedforward

Li, Yangmin

362

Coherent Phonon-Grain Boundary Scattering in Silicon Inverse Opals Bibek R. Parajuli,,  

E-Print Network [OSTI]

in the structure. The corresponding material thermal conductivity is in the range 5-12 W/mK and has an anomalous T1 the lattice structure resulting in significant increase in thermal resistance. At microscopic length scales thermal conductivity of the material. Previous theoretical work on thermal transport in inverse opals12

Braun, Paul

363

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

E-Print Network [OSTI]

Evaluating atmospheric CO2 inversions at multiple scales over a highly inventoried agricultural the results to an inventory of CO2 fluxes. Statistics from densely monitored crop production, consisting primarily of corn and soybeans, provided the backbone of a well studied bottom-up inventory flux estimate

Collett Jr., Jeffrey L.

364

Inverse modeling of European CH4 emissions 20012006 P. Bergamaschi,1  

E-Print Network [OSTI]

for the total anthropogenic emissions from NWE are 21% higher compared to the EDGARv4.0 emission inventory us from verifying (or falsifying) the bottomup inventories in a strict sense. Sensitivity studies bottomup inventories, a further sensitivity inversion without this a priori information results in very

Haak, Hein

365

On an inverse problem: the recovery of non-smooth solutions to backward heat equation  

E-Print Network [OSTI]

On an inverse problem: the recovery of non-smooth solutions to backward heat equation Fabien Ternat solu- tions of backward heat equation. In this paper, we test the viability of using these techniques to recover non-smooth solutions of backward heat equation. In particular, we numerically integrate

Daripa, Prabir

366

IMPROVED SEARCH OF PRINCIPAL COMPONENT ANALYSIS DATABASES FOR SPECTRO-POLARIMETRIC INVERSION  

SciTech Connect (OSTI)

We describe a simple technique for the acceleration of spectro-polarimetric inversions based on principal component analysis (PCA) of Stokes profiles. This technique involves the indexing of the database models based on the sign of the projections (PCA coefficients) of the first few relevant orders of principal components of the four Stokes parameters. In this way, each model in the database can be attributed a distinctive binary number of 2{sup 4n} bits, where n is the number of PCA orders used for the indexing. Each of these binary numbers (indices) identifies a group of ''compatible'' models for the inversion of a given set of observed Stokes profiles sharing the same index. The complete set of the binary numbers so constructed evidently determines a partition of the database. The search of the database for the PCA inversion of spectro-polarimetric data can profit greatly from this indexing. In practical cases it becomes possible to approach the ideal acceleration factor of 2{sup 4n} as compared to the systematic search of a non-indexed database for a traditional PCA inversion. This indexing method relies on the existence of a physical meaning in the sign of the PCA coefficients of a model. For this reason, the presence of model ambiguities and of spectro-polarimetric noise in the observations limits in practice the number n of relevant PCA orders that can be used for the indexing.

Casini, R.; Lites, B. W. [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 (United States); Ramos, A. Asensio [Instituto de Astrofisica de Canarias, c/Via Lactea s/n, E-38205 La Laguna, Tenerife (Spain); Ariste, A. Lopez [THEMIS, CNRS UPS 853, c/Via Lactea s/n, E-38200 La Laguna, Tenerife (Spain)

2013-08-20T23:59:59.000Z

367

First-order disorder-driven transition and inverse melting of the vortex lattice  

E-Print Network [OSTI]

`inverse' melting behavior. � 2001 Published by Elsevier Science B.V. Keywords: Type-II superconductivity-order transition (FOT) [1±5] whereas at low temperatures the ordered vortex lattice transforms into a disordered open questions in the phase diagram of HTS is the thermodynamic nature of the disorder-dri- ven

Zeldov, Eli

368

Inversion tectonics during continental rifting: The Turkana Cenozoic rifted zone, northern Kenya  

E-Print Network [OSTI]

Inversion tectonics during continental rifting: The Turkana Cenozoic rifted zone, northern Kenya B of inverted deformation within Miocene-Recent basins of the Turkana rift (northern Kenya) in the eastern: The Turkana Cenozoic rifted zone, northern Kenya, Tectonics, 24, TC2002, doi:10.1029/2004TC001637. 1

Brest, Université de

369

Sustainability of terrestrial carbon sequestration: A case study in Duke Forest with inversion approach  

E-Print Network [OSTI]

Sustainability of terrestrial carbon sequestration: A case study in Duke Forest with inversion of terrestrial carbon (C) sequestration is critical for the success of any policies geared toward stabilizing. Ellsworth, A. Finzi, J. Lichter, and W. H. Schlesinger, Sustainability of terrestrial carbon sequestration

DeLucia, Evan H.

370

Frequency Moments Inverse Problem and Maximum (Shannon vs. R enyi-Tsallis) Entropy  

E-Print Network [OSTI]

) maximization of Shannon's entropy (MaxEnt), b) maximization of R#19;enyi-Tsallis entropy (maxTent). ConcerningEnt 4 1.2 Aims 5 2 Frequency moment constraints 5 2.1 Characteristics of MaxEnt choice 6 2.2 Maximum RFrequency Moments Inverse Problem and Maximum (Shannon vs. R#19;enyi-Tsallis) Entropy #3; A case

371

Presented at the IS&T/SID Fifth Color Imaging Conference, November 1997 Inverse Lighting for Photography  

E-Print Network [OSTI]

Presented at the IS&T/SID Fifth Color Imaging Conference, November 1997 Inverse Lighting, New York Abstract We introduce a technique for improving photographs using inverse lighting, a new process based on algorithms devel­ oped in computer graphics for computing the reflection of light in 3D

Marschner, Steve

372

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

373

AVA simultaneous inversion of partially stacked seismic amplitude data for the spatial delineation of lithology and fluid units of deepwater  

E-Print Network [OSTI]

AVA simultaneous inversion of partially stacked seismic amplitude data for the spatial delineation application of ampli- tude-versus-angle AVA inversion of prestack-seismic am- plitude data to detect-log data. Standard techniques such as crossplot analysis, Biot-Gass- mann fluid substitution, AVA

Torres-VerdĂ­n, Carlos

374

Gravity inversion, AMS and geochronological investigations of syntectonic granitic plutons in the southern part of the Variscan French Massif Central  

E-Print Network [OSTI]

1 Gravity inversion, AMS and geochronological investigations of syntectonic granitic plutons gravity inversion does not show any evidence of rooting of the granites along the SHF. Therefore, despite tectonic framework rather than local faulting as a factor controlling pluton emplacement. Keywords: granite

Boyer, Edmond

375

Sensitivity analysis of data-related factors controlling AVA simultaneous inversion of partially stacked seismic amplitude data: Application  

E-Print Network [OSTI]

of Mexico Arturo Contreras1 , Carlos Torres-VerdĂ­n2 , and Tim Fasnacht3 ABSTRACT We consider the inversion in the central Gulf of Mexico to generate syn- thetic seismic amplitude data and evaluate inversion results Chevron Energy Technology Company, Earth Sciences Technology Department, Reservoir Characterization Unit

Torres-VerdĂ­n, Carlos

376

Rapid 3D Seismic Source Inversion Using Windows Azure and Amazon EC2 Vedaprakash Subramanian, Hongyi Ma,  

E-Print Network [OSTI]

Rapid 3D Seismic Source Inversion Using Windows Azure and Amazon EC2 Vedaprakash Subramanian seismic source inversion on both cluster (specif- ically, MPI-based) and cloud computing (specifically to seismic source in- version is feasible and has its advantages. In addition, we notice that both cluster

Wang, Liqiang

377

High-resolution geostatistical inversion of a seismic data set acquired in a Gulf of Mexico gas reservoir.  

E-Print Network [OSTI]

High-resolution geostatistical inversion of a seismic data set acquired in a Gulf of Mexico gas, UNOCAL Corporation Summary Geostatistical inversion is applied on a Gulf-of-Mexico, 3D post-stack seismic in this paper is located in the Gulf of Mexico, off the coast of Louisiana. Existing development wells reach two

Torres-VerdĂ­n, Carlos

378

Florence, 28/02/2011: Two applied inverse problems: Introduction 1 -Problem #1: Studying the protein fold via NMR constraints.  

E-Print Network [OSTI]

the protein fold via NMR constraints. In collaboration with the CERM (Centre for Magnetic Resonance problems. #12;Florence, 28/02/2011: Two applied inverse problems: The problem of protein folding 2 H CCN) Backbone #12;Florence, 28/02/2011: Two applied inverse problems: The problem of protein folding 3 Genoma

Pedicini, Marco

379

Biosystem Dynamics & Design | EMSL  

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

Biosystem Dynamics & Design Overview Atmospheric Aerosol Systems Biosystem Dynamics & Design Energy Materials & Processes Terrestrial & Subsurface Ecosystems Biosystem Dynamics &...

380

Bayesian reconstruction of the cosmological large-scale structure: methodology, inverse algorithms and numerical optimization  

E-Print Network [OSTI]

We address the inverse problem of cosmic large-scale structure reconstruction from a Bayesian perspective. For a linear data model, a number of known and novel reconstruction schemes, which differ in terms of the underlying signal prior, data likelihood, and numerical inverse extra-regularization schemes are derived and classified. The Bayesian methodology presented in this paper tries to unify and extend the following methods: Wiener-filtering, Tikhonov regularization, Ridge regression, Maximum Entropy, and inverse regularization techniques. The inverse techniques considered here are the asymptotic regularization, the Jacobi, Steepest Descent, Newton-Raphson, Landweber-Fridman, and both linear and non-linear Krylov methods based on Fletcher-Reeves, Polak-Ribiere, and Hestenes-Stiefel Conjugate Gradients. The structures of the up-to-date highest-performing algorithms are presented, based on an operator scheme, which permits one to exploit the power of fast Fourier transforms. Using such an implementation of the generalized Wiener-filter in the novel ARGO-software package, the different numerical schemes are benchmarked with 1-, 2-, and 3-dimensional problems including structured white and Poissonian noise, data windowing and blurring effects. A novel numerical Krylov scheme is shown to be superior in terms of performance and fidelity. These fast inverse methods ultimately will enable the application of sampling techniques to explore complex joint posterior distributions. We outline how the space of the dark-matter density field, the peculiar velocity field, and the power spectrum can jointly be investigated by a Gibbs-sampling process. Such a method can be applied for the redshift distortions correction of the observed galaxies and for time-reversal reconstructions of the initial density field.

F. S. Kitaura; T. A. Ensslin

2009-11-06T23:59:59.000Z

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


381

The cation inversion and magnetization in nanopowder zinc ferrite obtained by soft mechanochemical processing  

SciTech Connect (OSTI)

Graphical abstract: - Highlights: • Nano powder of ZnFe{sub 2}O{sub 4} prepared by a soft mechanochemical route after 18 h milling. • Phase formation controlled by XRD, Raman spectroscopy and magnetic measurements. • Size, strain and cation inversion degree determined by Rietveld refinement. • We were able to estimate the degree of inversion at most 0.348 and 0.4. • Obtained extremely high values of saturation magnetizations at T = 4.5 K. - Abstract: Two zinc ferrite nanoparticle materials were prepared by the same method – soft mechanochemical synthesis, but starting from different powder mixtures: (1) Zn(OH){sub 2}/?-Fe{sub 2}O{sub 3} and (2) Zn(OH){sub 2}/Fe(OH){sub 3}. In both cases a single phase system was obtained after 18 h of milling. The progress of the synthesis was controlled by X-ray diffractometry (XRD), Raman spectroscopy, TEM and magnetic measurements. Analysis of the XRD patterns by Rietveld refinement allowed determination of the cation inversion degree for both obtained single phase ZnFe{sub 2}O{sub 4} samples. The sample obtained from mixture (1) has the cation inversion degree 0.3482 and the sample obtained from mixture (2) 0.400. Magnetization measurements were confirmed that the degrees of the inversion were well estimated. Comparison with published data shows that used method of synthesis gives nano powder samples with extremely high values of saturation magnetizations: sample (1) 78.3 emu g{sup ?1} and sample (2) 91.5 emu g{sup ?1} at T = 4.5 K.

Milutinovi?, A. [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia); Lazarevi?, Z., E-mail: lzorica@yahoo.com [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia); Jovaleki?, ?. [Institute for Multidisciplinary Research, University of Belgrade, Belgrade (Serbia); Kuryliszyn-Kudelska, I. [Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw (Poland); Rom?evi?, M.; Kosti?, S.; Rom?evi?, N. [Institute of Physics, University of Belgrade, Pregrevica 118, Zemun, Belgrade (Serbia)

2013-11-15T23:59:59.000Z

382

Inverse Modeling of Hydrologic Parameters Using Surface Flux and Runoff Observations in the Community Land Model  

SciTech Connect (OSTI)

This study demonstrates the possibility of inverting hydrologic parameters using surface flux and runoff observations in version 4 of the Community Land Model (CLM4). Previous studies showed that surface flux and runoff calculations are sensitive to major hydrologic parameters in CLM4 over different watersheds, and illustrated the necessity and possibility of parameter calibration. Two inversion strategies, the deterministic least-square fitting and stochastic Markov-Chain Monte-Carlo (MCMC) - Bayesian inversion approaches, are evaluated by applying them to CLM4 at selected sites. The unknowns to be estimated include surface and subsurface runoff generation parameters and vadose zone soil water parameters. We find that using model parameters calibrated by the least-square fitting provides little improvements in the model simulations but the sampling-based stochastic inversion approaches are consistent - as more information comes in, the predictive intervals of the calibrated parameters become narrower and the misfits between the calculated and observed responses decrease. In general, parameters that are identified to be significant through sensitivity analyses and statistical tests are better calibrated than those with weak or nonlinear impacts on flux or runoff observations. Temporal resolution of observations has larger impacts on the results of inverse modeling using heat flux data than runoff data. Soil and vegetation cover have important impacts on parameter sensitivities, leading to the different patterns of posterior distributions of parameters at different sites. Overall, the MCMC-Bayesian inversion approach effectively and reliably improves the simulation of CLM under different climates and environmental conditions. Bayesian model averaging of the posterior estimates with different reference acceptance probabilities can smooth the posterior distribution and provide more reliable parameter estimates, but at the expense of wider uncertainty bounds.

Sun, Yu; Hou, Zhangshuan; Huang, Maoyi; Tian, Fuqiang; Leung, Lai-Yung R.

2013-12-10T23:59:59.000Z

383

Single- and coupled-channel radial inverse scattering with supersymmetric transformations  

E-Print Network [OSTI]

The present status of the coupled-channel inverse-scattering method with supersymmetric transformations is reviewed. We first revisit in a pedagogical way the single-channel case, where the supersymmetric approach is shown to provide a complete solution to the inverse-scattering problem. A special emphasis is put on the differences between conservative and non-conservative transformations. In particular, we show that for the zero initial potential, a non-conservative transformation is always equivalent to a pair of conservative transformations. These single-channel results are illustrated on the inversion of the neutron-proton triplet eigenphase shifts for the S and D waves. We then summarize and extend our previous works on the coupled-channel case and stress remaining difficulties and open questions. We mostly concentrate on two-channel examples to illustrate general principles while keeping mathematics as simple as possible. In particular, we discuss the difference between the equal-threshold and different-threshold problems. For equal thresholds, conservative transformations can provide non-diagonal Jost and scattering matrices. Iterations of such transformations are shown to lead to practical algorithms for inversion. A convenient technique where the mixing parameter is fitted independently of the eigenphases is developed with iterations of pairs of conjugate transformations and applied to the neutron-proton triplet S-D scattering matrix, for which exactly-solvable matrix potential models are constructed. For different thresholds, conservative transformations do not seem to be able to provide a non-trivial coupling between channels. In contrast, a single non-conservative transformation can generate coupled-channel potentials starting from the zero potential and is a promising first step towards a full solution to the coupled-channel inverse problem with threshold differences.

Daniel Baye; Jean-Marc Sparenberg; Andrey M Pupasov-Maksimov; Boris F Samsonov

2014-06-13T23:59:59.000Z

384

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

SciTech Connect (OSTI)

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.

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

2012-11-01T23:59:59.000Z

385

Design Guidelines INTRODUCTION  

E-Print Network [OSTI]

Design Guidelines March 2005 #12;INTRODUCTION INTENT The Boise State University (BSU) Design Guidelines are intended for the use by design professionals as a resource to facilitate the design of BSU design, construction and operation. The intent of these guidelines is to provide the information

Barrash, Warren

386

Making Argumentation Serve Design  

E-Print Network [OSTI]

9 Making Argumentation Serve Design Gerhard Fischer University ofColorado Andreas C. Lemke ALCATEL scientist interesled in design and design suppon S\\"Stems, particularly in domain-oriented design environmenlS and how they make :irgumemation serve design by supporting reflection-in-action; he

Fischer, Gerhard

387

Renormalization of the strongly attractive inverse square potential: Taming the singularity  

E-Print Network [OSTI]

Quantum anomalies in the inverse square potential are well known and widely investigated. Most prominent is the unbounded increase in oscillations of the particle's state as it approaches the origin when the attractive coupling parameter is greater than the critical value of 1/4. Due to this unphysical divergence in oscillations, we are proposing that the interaction gets screened at short distances making the coupling parameter acquire an effective (renormalized) value that falls within the weak range 0 to 1/4. This prevents the oscillations form growing without limit giving a lower bound to the energy spectrum and forcing the Hamiltonian of the system to be self-adjoint. Technically, this translates into a regularization scheme whereby the inverse square potential is replaced near the origin by another that has the same singularity but with a weak coupling strength. Here, we take the Eckart as the regularizing potential and obtain the corresponding solutions (discrete bound states and continuum scattering states).

A. D. Alhaidari

2014-06-14T23:59:59.000Z

388

Experimental Observation of the Inverse Spin Hall Effect at Room Temperature  

SciTech Connect (OSTI)

We observe the inverse spin Hall effect in a two-dimensional electron gas confined in Al-GaAs/InGaAs quantum wells. Specifically, they find that an inhomogeneous spin density induced by the optical injection gives rise to an electric current transverse to both the spin polarization and its gradient. The spin Hall conductivity can be inferred from such a measurement through the Einstein relation and the onsager relation, and is found to have the order of magnitude of 0.5(e{sup 2}/h). The observation is made at the room temperature and in samples with macroscopic sizes, suggesting that the inverse spin Hall effects is a robust macroscopic transport phenomenon.

Liu, Baoli; Shi, Junren; Wang, Wenxin; Zhao, Hongming; Li, Dafang; /Beijing, Inst. Phys.; Zhang, Shoucheng; /Stanford U., Phys. Dept.; Xue, Qikun; Chen, Dongmin; /Beijing, Inst. Phys.

2010-03-16T23:59:59.000Z

389

Spectroscopy of Double-Beta and Inverse-Beta Decays from 100Mo for Neutrinos  

E-Print Network [OSTI]

Spectroscopic studies of two beta-rays from 100Mo are shown to be of potential interest for investigating both the Majorana neutrino mass by neutrinoless double beta-decay and low energy solar neutrino's by inverse beta-decay. With a multi-ton 100Mo detector, coincidence studies of correlated beta-beta from neutrinoless double beta-decay, together with the large Q value, permit identification of the neutrino-mass term with a sensitivity of ~ 0.03 eV. Correlation studies of the inverse beta and the successive beta-decay of 100Tc, together with the large capture rates for low energy solar neutrino's, make it possible to detect in realtime individual low energy solar neutrino in the same detector.

H. Ejiri; J. Engel; R. Hazama; P. Krastev; N. Kudomi; R. G. H. Robertson

2000-05-15T23:59:59.000Z

390

SOLA inversions for the core structure of solar-type stars  

E-Print Network [OSTI]

The Subtractive Optimally Localized Averages (SOLA) method, developed and extensively used in helioseismology, is applied to artificial data to obtain measures of the sound speed inside a solar-type star. In contrast to inversion methods which fit models to some aspect of the data, methods such as SOLA provide an honest assessment of what can truly be resolved using seismic data, without introducing additional assumptions such as that the space of admissible stellar models is small. The resulting measures obtained from SOLA inversion can subsequently be used to eliminate putative stellar models. Here we present results of experiments to test the reliability of SOLA inferences using solar models and models of solar-type stars.

Sarbani Basu; J. Christensen-Dalsgaard; M. J. Thompson

2001-10-19T23:59:59.000Z

391

Neutrinoless double beta decay and pseudo-Dirac neutrino mass predictions through inverse seesaw mechanism  

E-Print Network [OSTI]

In the inverse seesaw extension of the standard model, supersymmetric or non-supersymmetric, while the light left-handed neutrinos are Majorana, the heavy right-handed neutrinos are pseudo-Dirac fermions. We show how one of these latter category of particles can contribute quite significantly to neutrinoless double beta decay. The neutrino virtuality momentum is found to play a crucial role in the non-standard contributions leading to the prediction of the pseudo-Dirac fermion mass in the range of $120\\, {MeV}-500\\, {MeV}$. When the Dirac neutrino mass matrix in the inverse seesaw formula is similar to the up-quark mass matrix, characteristic of high scale quark-lepton symmetric origin, the predicted branching ratios for lepton flavor violating decays are also found to be closer to the accessible range of ongoing experiments.

Ram Lal Awasthi; M. K. Parida; Sudhanwa Patra

2013-01-21T23:59:59.000Z

392

SOUND-SPEED INVERSION OF THE SUN USING A NONLOCAL STATISTICAL CONVECTION THEORY  

SciTech Connect (OSTI)

Helioseismic inversions reveal a major discrepancy in sound speed between the Sun and the standard solar model just below the base of the solar convection zone. We demonstrate that this discrepancy is caused by the inherent shortcomings of the local mixing-length theory adopted in the standard solar model. Using a self-consistent nonlocal convection theory, we construct an envelope model of the Sun for sound-speed inversion. Our solar model has a very smooth transition from the convective envelope to the radiative interior, and the convective energy flux changes sign crossing the boundaries of the convection zone. It shows evident improvement over the standard solar model, with a significant reduction in the discrepancy in sound speed between the Sun and local convection models.

Zhang Chunguang; Deng Licai [Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); Xiong Darun [Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China); Christensen-Dalsgaard, Jorgen, E-mail: cgzhang@nao.cas.cn [Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark)

2012-11-01T23:59:59.000Z

393

Comparing radiative and recoil corrections in neutron beta-decay and inverse beta-decay  

E-Print Network [OSTI]

The inverse $\\beta$-decay reaction, anti-nu_e + p --> e^+ + n, for low-energy anti-neutrinos coming from nuclear reactors is of great current interest in connection with high-precision measurements of the neutrino mixing angle $\\theta_{13}$. We have previously derived analytic expressions, up to next-to-leading order in heavy-baryon chiral perturbation theory, for the radiative corrections (RCs) and the nucleon-recoil corrections both for this reaction and for the related neutron $\\beta$-decay process. We investigate here the numerical consequences of these analytic expressions. We show that the recoil corrections are small for neutron $\\beta$-decay, but for inverse $\\beta$-decay, the recoil corrections are comparable in size to the RCs for typical energies of reactor anti-neutrinos, and they have opposite signs. It turns out that the RCs and the recoil corrections exhibit very different dependences on the neutrino energy.

U. Raha; F. Myhrer; K. Kubodera

2014-05-06T23:59:59.000Z

394

Rao-Blackwellised Interacting Markov Chain Monte Carlo for Electromagnetic Scattering Inversion  

E-Print Network [OSTI]

The following electromagnetism (EM) inverse problem is addressed. It consists in estimating local radioelectric properties of materials recovering an object from the global EM scattering measurement, at various incidences and wave frequencies. This large scale ill-posed inverse problem is explored by an intensive exploitation of an efficient 2D Maxwell solver, distributed on High Performance Computing (HPC) machines. Applied to a large training data set, a statistical analysis reduces the problem to a simpler probabilistic metamodel, on which Bayesian inference can be performed. Considering the radioelectric properties as a dynamic stochastic process, evolving in function of the frequency, it is shown how advanced Markov Chain Monte Carlo methods, called Sequential Monte Carlo (SMC) or interacting particles, can provide estimations of the EM properties of each material, and their associated uncertainties.

Giraud, François

2012-01-01T23:59:59.000Z

395

Building accurate initial models using gain functions for waveform inversion in the Laplace domain  

E-Print Network [OSTI]

We suggest an initial model building technique using time gain functions in the Laplace domain. Applying the gain expressed as a power of time is equivalent to taking the partial derivative of the Laplace-domain wavefield with respect to a damping constant. We construct an objective function, which minimizes the logarithmic differences between the gained field data and the partial derivative of the modeled data with respect to the damping constant. We calculate the modeled wavefield, the partial derivative wavefield, and the gradient direction in the Laplace domain using the analytic Green's function starting from a constant velocity model. This is an efficient method to generate an accurate initial model for a following Laplace-domain inversion. Numerical examples using two marine field datasets confirm that a starting model updated once from a scratch using the gradient direction calculated with the proposed method can be successfully used for a subsequent Laplace-domain inversion.

Wansoo Ha; Changsoo Shin

2014-08-20T23:59:59.000Z

396

Strategy for the inversion of Hinode spectropolarimetric measurements in the quiet Sun  

E-Print Network [OSTI]

In this paper we propose an inversion strategy for the analysis of spectropolarimetric measurements taken by {\\em Hinode} in the quiet Sun. The spectropolarimeter of the Solar Optical Telescope aboard {\\em Hinode} records the Stokes spectra of the \\ion{Fe}{i} line pair at 630.2 nm with unprecendented angular resolution, high spectral resolution, and high sensitivity. We discuss the need to consider a {\\em local} stray-light contamination to account for the effects of telescope diffraction. The strategy is applied to observations of a wide quiet Sun area at disk center. Using these data we examine the influence of noise and initial guess models in the inversion results. Our analysis yields the distributions of magnetic field strengths and stray-light factors. They show that quiet Sun internetwork regions consist mainly of hG fields with stray-light contaminations of about 0.8.

D. Orozco Suarez; L. R. Bellot Rubio; J. C. del Toro Iniesta; S. Tsuneta; B. W. Lites; K. Ichimoto; Y. Katsukawa; S. Nagata; T. Shimizu; R. A. Shine; Y. Suematsu; T. D. Tarbell; A. M. Title

2007-09-13T23:59:59.000Z

397

Three-dimensional gravity modeling and focusing inversion using rectangular meshes.  

SciTech Connect (OSTI)

Rectangular grid cells are commonly used for the geophysical modeling of gravity anomalies, owing to their flexibility in constructing complex models. The straightforward handling of cubic cells in gravity inversion algorithms allows for a flexible imposition of model regularization constraints, which are generally essential in the inversion of static potential field data. The first part of this paper provides a review of commonly used expressions for calculating the gravity of a right polygonal prism, both for gravity and gradiometry, where the formulas of Plouff and Forsberg are adapted. The formulas can be cast into general forms practical for implementation. In the second part, a weighting scheme for resolution enhancement at depth is presented. Modelling the earth using highly digitized meshes, depth weighting schemes are typically applied to the model objective functional, subject to minimizing the data misfit. The scheme proposed here involves a non-linear conjugate gradient inversion scheme with a weighting function applied to the non-linear conjugate gradient scheme's gradient vector of the objective functional. The low depth resolution due to the quick decay of the gravity kernel functions is counteracted by suppressing the search directions in the parameter space that would lead to near-surface concentrations of gravity anomalies. Further, a density parameter transformation function enabling the imposition of lower and upper bounding constraints is employed. Using synthetic data from models of varying complexity and a field data set, it is demonstrated that, given an adequate depth weighting function, the gravity inversion in the transform space can recover geologically meaningful models requiring a minimum of prior information and user interaction.

Commer, M.

2011-03-01T23:59:59.000Z

398

An Inverse Finite Element Analysis and A Parametric Study of Small Punch Tests  

E-Print Network [OSTI]

-displacement curve of 40CrNi2Mo alloy steel (Guan et al., 2011) ....... 21 Fig. 2.8 Estimate of the first step displacement ........................................................... 22 Fig. 2.9 FE simulation results with ? = 800 MPa at ? = 0...-strain curve of 40CrNi2Mo alloy steel from the inverse FE x analysis of the SPT ......................................................................................... 28 Fig. 2.18 1.25Cr0.5Mo alloy steel elastic modulus and yield...

Xu, Zhenzhen

2012-02-14T23:59:59.000Z

399

A Turbulent Constitutive Law for the Two-Dimensional Inverse Energy Cascade  

E-Print Network [OSTI]

We develop a fundamental approach to a turbulent constitutive law for the 2D inverse cascade, based upon a convergent multi-scale gradient (MSG) expansion. To first order in gradients we find that the turbulent stress generated by small-scale eddies is proportional not to strain but instead to `skew-strain,' i.e. the strain tensor rotated by $45^\\circ.$ The skew-strain from a given scale of motion makes no contribution to energy flux across eddies at that scale, so that the inverse cascade cannot be strongly scale-local. We show that this conclusion extends a result of Kraichnan for spectral transfer and is due to absence of vortex-stretching in 2D. This `weakly local' mechanism of inverse cascade requires a relative rotation between the principal directions of strain at different scales and we argue for this using both the dynamical equations of motion and also a heuristic model of `thinning' of small-scale vortices by an imposed large-scale strain. Carrying out our expansion to second-order in gradients, we find two additional terms in the stress that can contribute to energy cascade. The first is a Newtonian stress with an `eddy-viscosity' due to differential strain-rotation, and the second is a tensile stress exerted along vorticity contour-lines. The latter was anticipated by Kraichnan for a very special model situation of small-scale vortex wave-packets in a uniform strain field. We prove a proportionality in 2D between the mean rates of differential strain-rotation and of vorticity-gradient stretching, analogous to a similar relation of Betchov for 3D. According to this result the second-order stresses will also contribute to inverse cascade when, as is plausible, vorticity contour-lines lengthen on average by turbulent advection.

Gregory L. Eyink

2005-12-10T23:59:59.000Z

400

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

SciTech Connect (OSTI)

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.

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)

2014-03-15T23:59:59.000Z

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


401

Inverse fixed energy scattering problem for the two-dimensional nonlinear Schroedinger operator  

E-Print Network [OSTI]

This work studies the direct and inverse fixed energy scattering problem for two-dimensional Schroedinger equation with rather general nonlinear index of refraction. In particular, using the Born approximation we prove that all singularities of the unknown compactly supported potential from $L^2$-space can be obtained uniquely by the scattering data with fixed positive energy. The proof is based on the new estimates for the Faddeev-Green's function in $L^\\infty$-space.

Georgios Fotopoulos; Valery Serov

2014-12-01T23:59:59.000Z

402

Impeded inverse energy transfer in the Charney--Hasegawa--Mima model of quasi-geostrophic flows  

E-Print Network [OSTI]

The behaviour of turbulent flows within the single-layer quasi-geostrophic (Charney--Hasegawa--Mima) model is shown to be strongly dependent on the Rossby deformation wavenumber $\\lambda$ (or free-surface elasticity). Herein, we derive a bound on the inverse energy transfer, specifically on the growth rate $\\d\\ell/\\dt$ of the characteristic length scale $\\ell$ representing the energy centroid. It is found that $\\d\\ell/\\dt\\le2\

Chuong V. Tran; David G. Dritschel

2005-12-02T23:59:59.000Z

403

Optical imaging of phantoms from real data by an approximately globally convergent inverse algorithm  

E-Print Network [OSTI]

A numerical method for an inverse problem for an elliptic equation with the running source at multiple positions is presented. This algorithm does not rely on a good first guess for the solution. The so-called "approximate global convergence" property of this method is shown here. The performance of the algorithm is verified on real data for Diffusion Optical Tomography. Direct applications are in near-infrared laser imaging technology for stroke detection in brains of small animals.

Jianzhong Su; Michael V. Klibanov; Yueming Liu; Zhijin Lin; Natee Pantong; Hanli Liu

2012-08-25T23:59:59.000Z

404

Inversion of field-scale partitioning tracer response for characterizing oil saturation distribution: a streamline approach  

E-Print Network [OSTI]

INVERSION OF FIELD-SCALE PARTITIONING TRACER RESPONSE FOR CHARACTERIZING OIL SATURATION DISTRIBUTION: A STREAMLINE APPROACH A Thesis by PAVEL ALEXANDROVICH ILIASSOV Submitted to the Office of Graduate Studies of Texas A&M University... A Thesis by PAVEL ALEXANDROVICH ILIASSOV Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: c 4- Akhil Datta-Gupta (Chair of Committee...

Iliassov, Pavel Alexandrovich

2000-01-01T23:59:59.000Z

405

New inverse quasifission mechanism to produce neutron-rich transfermium nuclei  

SciTech Connect (OSTI)

Based on time-dependent Hartree-Fock theory, a new inverse quasifission mechanism is proposed to produce neutron-rich transfermium nuclei in the collision of prolate deformed actinides. Calculations show that the collision of the tip of one nucleus with the side of the other results in a nucleon flux toward the latter. The roles of nucleon evaporation and impact parameter, as well as collision time, are discussed.

Kedziora, David J. [Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia); Simenel, Cedric [Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia); CEA, Centre de Saclay, IRFU/Service de Physique Nucleaire, F-91191 Gif-sur-Yvette (France)

2010-04-15T23:59:59.000Z

406

Inverse-Compton Emission from Clusters of Galaxies: Predictions for ASTRO-H  

E-Print Network [OSTI]

The intra-cluster medium of several galaxy clusters hosts large-scale regions of diffuse synchrotron radio emission, known as radio halos and relics, which demonstrate the presence of magnetic fields and relativistic electrons in clusters. These relativistic electrons should also emit X-rays through inverse-Compton scattering off of cosmic microwave background photons. The detection of such a non-thermal X-ray component, together with the radio measurement, would permit to clearly separate the magnetic field from the relativistic electron distribution as the inverse-Compton emission is independent from the magnetic field in the cluster. However, non-thermal X-rays have not been conclusively detected from any cluster of galaxies so far. In this paper, for the first time, we model the synchrotron and inverse-Compton emission of all clusters hosting radio halos and relics for which the spectral index can be determined. We provide constraints on the volume-average magnetic field by comparing with current X-ray me...

Bartels, Richard; Ando, Shin'ichiro

2015-01-01T23:59:59.000Z

407

Solar Design Workbook  

SciTech Connect (OSTI)

This Solar Design Workbook presents solar building design applications for commercial buildir^s. The book is divided into four sections. The first section describes the variety of solar applications in buildings including conservation aspects, solar fundamentals, passive systems, active systems, daylighting, and other solar options. Solar system design evaluation techniques including considerations for building energy requirements, passive systems, active systems, and economics are presented in Section II. The third section attempts to assist the designer in the building design process for energy conservation and solar applications including options and considerations for pre-design, design, and post-design phases. The information required for the solar design proee^ has not been fully developed at this time. Therefore, Section III is incomplete, but an overview of the considerations with some of the design proces elements is presented. Section IV illustrates ease studies that utilize solar applications in the building design.

Franta, G.; Baylin, F.; Crowther, R.; Dubin, F.; Grace, A., Griffith, J.W.; Holtz, M.; Kutscher, C.; Nordham, D.; Selkowitz, S.; Villecco, M.

1981-06-01T23:59:59.000Z

408

Estimation of in-situ petrophysical properties from wireline formation tester and induction logging measurements: A joint inversion approach  

E-Print Network [OSTI]

-filtrate invasion and formation test. A fully implicit finite- difference black-oil reservoir simulator with brine noise-free and noise-contaminated synthetic data. Joint inversion results provide a quantitative proof

Torres-VerdĂ­n, Carlos

409

The prevalence and clinical presentation of fibularis myofascial trigger points in the assessment and treatment of inversion ankle sprains.  

E-Print Network [OSTI]

??Thesis (M.Tech.:Chiropractic)-Dept. of Chiropractic, Durban University of Technology, 2007 121 leaves Ankle sprains account for 85% of all injuries to the ankle (Garrick, 1997). Inversion… (more)

Van der Toorn, Ingrid

2007-01-01T23:59:59.000Z

410

An analytical inversion method for determining regional and global emissions of greenhouse gases: Sensitivity studies and application to halocarbons  

E-Print Network [OSTI]

A new analytical inversion method has been developed to determine the regional and global emissions of long-lived atmospheric trace gases. It exploits in situ measurement data from three global networks and builds on ...

Stohl, A.

411

Estimation of the direction of remanent magnetization: an inverse method using the phase spectrum of a magnetic anomaly  

E-Print Network [OSTI]

in partial fidfillment of thc requirements for the degree of XIAS IER OF SOIL'NGF. December l988 iviajor Subject: Geophysics ES'I'llvlATION Ol' THV. DIIIECTION OF' RElvIANENT MACNETIZATION: AN INVERSE METHOD DSINC 'THE PIIASV. SPECTRIIM OV A MAGNETIC... ot Department) December 1988 ABSTRACT Estimation of Direction of Remanent Magnetization: An Inverse Method Using th~ Phase Spectrum ot a. Magnetic Anomaly. (December 1988) Thomas Daniel Moriarty, B. S. , Rensselaer Polytechnic Institute Co...

Moriarty, Thomas D.

1988-01-01T23:59:59.000Z

412

An inverse analytical technique applied to a chloride contamination of groundwater at Indian School and Levering sites, Michigan  

E-Print Network [OSTI]

AN INVERSE ANALYTICAL TECHNIQUE APPLIED TO A CHLORIDE CONTAMINATION OF GROUNDWATER AT ZNDIAN SCHOOL AND LEVERZNG SITES, MZCHZGAN A Thesis by Helen Shumway Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIFNCE Decanter "99" Major Subject: Geology AN INVERSE ANALYTICAL TECHNIQUE APPLIED TO A CHLORIDE CONTAMINATION OF GROUNDWATER AT INDIAN SCHOOL AND LEVERING SITES, MICHIGAN A Thesis...

Shumway, Helen

1992-01-01T23:59:59.000Z

413

High Frequency Inversion Capacitance Measurements for 6H-SiC n-MOS Capacitors from 450 to 600 C  

E-Print Network [OSTI]

High Frequency Inversion Capacitance Measurements for 6H-SiC n-MOS Capacitors from 450 to 600 °C inversion capacitance due to thermal generation of holes in 6H-SiC n-MOS capacitors between 450 and 600 °C to thermal generation of holes in 6H-SiC n-MOS capacitors between 450 and 600 °C. In order to ensure

Ghosh, Ruby N.

414

DOE handbook: Design considerations  

SciTech Connect (OSTI)

The Design Considerations Handbook includes information and suggestions for the design of systems typical to nuclear facilities, information specific to various types of special facilities, and information useful to various design disciplines. The handbook is presented in two parts. Part 1, which addresses design considerations, includes two sections. The first addresses the design of systems typically used in nuclear facilities to control radiation or radioactive materials. Specifically, this part addresses the design of confinement systems and radiation protection and effluent monitoring systems. The second section of Part 1 addresses the design of special facilities (i.e., specific types of nonreactor nuclear facilities). The specific design considerations provided in this section were developed from review of DOE 6430.1A and are supplemented with specific suggestions and considerations from designers with experience designing and operating such facilities. Part 2 of the Design Considerations Handbook describes good practices and design principles that should be considered in specific design disciplines, such as mechanical systems and electrical systems. These good practices are based on specific experiences in the design of nuclear facilities by design engineers with related experience. This part of the Design Considerations Handbook contains five sections, each of which applies to a particular engineering discipline.

NONE

1999-04-01T23:59:59.000Z

415

ERISII Initial Design Document I . Design Goals  

E-Print Network [OSTI]

ERISII Initial Design Document I . Design Goals The goals behind the ERISII system are to present the directions of I*3 technology in general. In the first half of this document, we will examine the particular thee primary prototype will be used by environmental restoration managers, while being flexible enough

Wiederhold, Gio

416

Designing Asynchronous Microprocessors Design Process Overview  

E-Print Network [OSTI]

) Parallel CHP Parallel CHP Sequential CHP informal translation ISA process decomposition process decomposition compilation #15; Design process is a sequence of provably correct transformations. #15; First CHP the CHP decomposition. #15; The design style tends to em- phasize concurrency issues. 2 #12; Sequential

Martin, Alain

417

Extreme-Scale UQ for Bayesian Inverse Problems Governed by PDEs  

E-Print Network [OSTI]

, control of carbon sequestration processes, management of the nuclear fuel cycle, design of new nano

Sminchisescu, Cristian

418

Design Specification | Department of Energy  

Energy Savers [EERE]

Design Specification Design Specification PARS II Extraction Utility Design Spec v8020130510.pdf More Documents & Publications Design Specifications for the PARS II Extraction...

419

System Design | Department of Energy  

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

System Design System Design This template is used to define the system design System Design More Documents & Publications Transition Plan Training Plan Feasibility Study Report...

420

HIGH-ENERGY EMISSION OF GRB 130427A: EVIDENCE FOR INVERSE COMPTON RADIATION  

SciTech Connect (OSTI)

A nearby superluminous burst GRB 130427A was simultaneously detected by six ?-ray space telescopes (Swift, the Fermi GLAST Burst Monitor (GBM)/Large Area Telescope, Konus-Wind, SPI-ACS/INTEGRAL, AGILE, and RHESSI) and by three RAPTOR full-sky persistent monitors. The isotropic ?-ray energy release is ?10{sup 54} erg, rendering it the most powerful explosion among gamma-ray bursts (GRBs) with a redshift z ? 0.5. The emission above 100 MeV lasted about one day, and four photons are at energies greater than 40 GeV. We show that the count rate of 100 MeV-100 GeV emission may be mainly accounted for by the forward shock synchrotron radiation and the inverse Compton radiation likely dominates at GeV-TeV energies. In particular, an inverse Compton radiation origin is favored for the ?(95.3, 47.3, 41.4, 38.5, 32) GeV photons arriving at t ? (243, 256.3, 610.6, 3409.8, 34366.2) s after the trigger of Fermi-GBM. Interestingly, the external inverse Compton scattering of the prompt emission (the second episode, i.e., t ? 120-260 s) by the forward-shock-accelerated electrons is expected to produce a few ?-rays at energies above 10 GeV, while five were detected in the same time interval. A possible unified model for the prompt soft ?-ray, optical, and GeV emission of GRB 130427A, GRB 080319B, and GRB 090902B is outlined. Implications of the null detection of >1 TeV neutrinos from GRB 130427A by IceCube are discussed.

Fan, Yi-Zhong; Zhang, Fu-Wen; He, Hao-Ning; Zhou, Bei; Yang, Rui-Zhi; Jin, Zhi-Ping; Wei, Da-Ming [Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China); Tam, P. H. T. [Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China); Liang, Yun-Feng, E-mail: yzfan@pmo.ac.cn, E-mail: fwzhang@pmo.ac.cn, E-mail: dmwei@pmo.ac.cn [Department of Physics, Guangxi University, Guangxi 530004 (China)

2013-10-20T23:59:59.000Z

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


421

High-resolution inverse Raman and resonant-wave-mixing spectroscopy  

SciTech Connect (OSTI)

These research activities consist of high-resolution inverse Raman spectroscopy (IRS) and resonant wave-mixing spectroscopy to support the development of nonlinear-optical techniques for temperature and concentration measurements in combustion research. Objectives of this work include development of spectral models of important molecular species needed to perform coherent anti-Stokes Raman spectroscopy (CARS) measurements and the investigation of new nonlinear-optical processes as potential diagnostic techniques. Some of the techniques being investigated include frequency-degenerate and nearly frequency-degenerate resonant four-wave-mixing (DFWM and NDFWM), and resonant multi-wave mixing (RMWM).

Rahn, L.A. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

422

Inversion of Robin coefficient by a spectral stochastic finite element approach  

SciTech Connect (OSTI)

This paper investigates a variational approach to the nonlinear stochastic inverse problem of probabilistically calibrating the Robin coefficient from boundary measurements for the steady-state heat conduction. The problem is formulated into an optimization problem, and mathematical properties relevant to its numerical computations are investigated. The spectral stochastic finite element method using polynomial chaos is utilized for the discretization of the optimization problem, and its convergence is analyzed. The nonlinear conjugate gradient method is derived for the optimization system. Numerical results for several two-dimensional problems are presented to illustrate the accuracy and efficiency of the stochastic finite element method.

Jin Bangti [Department of Mathematics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong (China)], E-mail: kimbtsing@yahoo.com.cn; Zou Jun [Department of Mathematics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong (China)], E-mail: zou@math.cuhk.edu.hk

2008-03-01T23:59:59.000Z

423

Final Version: Orbital Specificity in the Unoccupied States of UO2 from Resonant Inverse Photoelectron Spectroscopy  

SciTech Connect (OSTI)

One of the crucial questions of all actinide electronic structure determinations is the issue of 5f versus 6d character and the distribution of these components across the density of states. Here, a break-though experiment is discussed, which has allowed the direct determination of the U5f and U6d contributions to the unoccupied density of states (UDOS) in Uranium Dioxide. A novel Resonant Inverse Photoelectron (RIPES) and X-ray Emission Spectroscopy (XES) investigation of UO{sub 2} is presented. It is shown that the U5f and U6d components are isolated and identified unambiguously.

Tobin, J G; Yu, S W

2012-03-12T23:59:59.000Z

424

Inverse diffraction for the Atmospheric Imaging Assembly in the Solar Dynamics Observatory  

E-Print Network [OSTI]

The Atmospheric Imaging Assembly in the Solar Dynamics Observatory provides full Sun images every 1 seconds in each of 7 Extreme Ultraviolet passbands. However, for a significant amount of these images, saturation affects their most intense core, preventing scientists from a full exploitation of their physical meaning. In this paper we describe a mathematical and automatic procedure for the recovery of information in the primary saturation region based on a correlation/inversion analysis of the diffraction pattern associated to the telescope observations. Further, we suggest an interpolation-based method for determining the image background that allows the recovery of information also in the region of secondary saturation (blooming).

Torre, Gabriele; Benvenuto, Federico; Massone, Anna Maria; Piana, Michele

2015-01-01T23:59:59.000Z

425

Inverse spin Hall effect induced by spin pumping into semiconducting ZnO  

SciTech Connect (OSTI)

The inverse spin Hall effect (ISHE) of n-type semiconductor ZnO thin films with weak spin-orbit coupling has been observed by utilizing the spin pumping method. In the ferromagnetic resonance condition, the spin pumping driven by the dynamical exchange interaction of a permalloy film injects a pure spin current into the adjacent ZnO layer. This spin current gives rise to a DC voltage through the ISHE in the ZnO layer, and the DC voltage is proportional to the microwave excitation power. The effect is sizeable even when the spin backflow is considered.

Lee, Jung-Chuan [Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China); Huang, Leng-Wei [Graduate Institute of Applied Physics, National Chengchi University, Taipei 11605, Taiwan (China); Hung, Dung-Shing, E-mail: dshung@mail.mcu.edu.tw [Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China); Department of Information and Telecommunications Engineering, Ming Chuan University, Taipei 111, Taiwan (China); Chiang, Tung-Han [Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan (China); Huang, J. C. A., E-mail: jcahuang@mail.ncku.edu.tw [Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan (China); Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 70101, Taiwan (China); Liang, Jun-Zhi [Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 70101, Taiwan (China); Department of Physics, Fu Jen Catholic University, Taipei 242, Taiwan (China); Lee, Shang-Fan, E-mail: leesf@phys.sinica.edu.tw [Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China); Graduate Institute of Applied Physics, National Chengchi University, Taipei 11605, Taiwan (China)

2014-02-03T23:59:59.000Z

426

TeV-scale gauged B-L symmetry with inverse seesaw mechanism  

SciTech Connect (OSTI)

We propose a modified version of the TeV-scale B-L extension of the standard model, where neutrino masses are generated through the inverse seesaw mechanism. We show that heavy neutrinos in this model can be accessible via clean signals at the LHC. The search for the extra gauge boson Z{sub B-L}{sup '} through the decay into dileptons or two dileptons plus missing energy is studied. We also show that the B-L extra Higgs boson can be directly probed at the LHC via a clean dilepton and missing energy signal.

Khalil, Shaaban [Center for Theoretical Physics at the British University in Egypt, Sherouk City, Cairo 11837 (Egypt) and Department of Mathematics, Ain Shams University, Faculty of Science, Cairo, 11566 (Egypt)

2010-10-01T23:59:59.000Z

427

Structure analysis of single- and multi-frequency subspace migrations in inverse scattering problems  

E-Print Network [OSTI]

In this literature, we carefully investigate the structure of single- and multi-frequency imaging functions, that are usually employed in inverse scattering problems. Based on patterns of the singular vectors of the Multi-Static Response (MSR) matrix, we establish a relationship between imaging functions and the Bessel function. This relationship indicates certain properties of imaging functions and the reason behind enhancement in the imaging performance by multiple frequencies. Several numerical simulations with a large amount of noisy data are performed in order to support our investigation.

Young Deuk Jo; Young Mi Kwon; Joo Young Huh; Won-Kwang Park

2013-01-09T23:59:59.000Z

428

Structured x-ray beams from twisted electrons by inverse Compton scattering of laser light  

E-Print Network [OSTI]

The inverse Compton scattering of laser light on high-energetic twisted electrons is investigated with the aim to construct spatially structured x-ray beams. In particular, we analyze how the properties of the twisted electrons, such as the topological charge and aperture angle of the electron Bessel beam, affects the energy and angular distribution of scattered x-rays. We show that with suitably chosen initial twisted electron states one can synthesize tailor-made x-ray beam profiles with a well-defined spatial structure, in a way not possible with ordinary plane-wave electron beams.

Seipt, D; Fritzsche, S

2014-01-01T23:59:59.000Z

429

Study of nuclei in the vicinity of the "Island of Inversion" through fusion-evaporation reaction  

E-Print Network [OSTI]

We report the first observation of high-spin states in nuclei in the vicinity of the "island of inversion", populated via the 18O+18O fusion reaction at an incident beam energy of 34 MeV. The fusion reaction mechanism circumvents the limitations of non-equilibrated reactions used to populate these nuclei. Detailed spin-parity measurements in these difficult to populate nuclei have been possible from the observed coincidence anisotropy and the linear polarization measurements. The spectroscopy of 33,34P and 33S is presented in detail along with the results of calculations within the shell model framework.

R. Chakrabarti; S. Mukhopadhyay Krishichayan; A. Chakraborty; A. Ghosh; S. Ray; S. S. Ghugre; A. K. Sinha; L. Chaturvedi; A. Y. Deo; I. Mazumdar; P. K. Joshi; R. Palit; Z. Naik; S. Kumar; N. Madhavan; R. P. Singh; S. Muralithar; B. K. Yogi; U. Garg

2009-04-30T23:59:59.000Z

430

Sub-mm tests of the gravitational inverse-square law  

E-Print Network [OSTI]

Sub-mm tests of the gravitational inverse-square law are interesting from several quite different perspectives. This paper discusses work by the Eot-Wash group performed since the publication of our initial result in February 2001. We find no evidence for short-range Yukawa interactions. Our results provide an upper limit of 200 micrometers on the size of the largest ``extra'' dimension, and for the unification scenario with 2 large extra dimensions, set an upper limit of 150 micrometers on the size of those dimensions.

E. G. Adelberger

2002-02-02T23:59:59.000Z

431

Inverse Cotton-Mouton effect of the Vacuum and of atomic systems  

E-Print Network [OSTI]

In this letter we calculate the Inverse Cotton-Mouton Effect (ICME) for the vacuum following the predictions of Quantum ElectroDynamics. We compare the value of this effect for the vacuum with the one expected for atomic systems. We finally show that ICME could be measured for the first time for noble gases using state-of-the-art laser systems and for the quantum vacuum with near-future laser facilities like ELI and HiPER, providing in particular a test of the nonlinear behaviour of quantum vacuum at intensities below the Schwinger limit of 4.5x10^33 W/m^2.

C. Rizzo; A. Dupays; R. Battesti; M. Fouché; G. L. J. A. Rikken

2010-05-04T23:59:59.000Z

432

Inverse Cotton-Mouton effect of the Vacuum and of atomic systems  

E-Print Network [OSTI]

In this letter we calculate the Inverse Cotton-Mouton Effect (ICME) for the vacuum following the predictions of Quantum ElectroDynamics. We compare the value of this effect for the vacuum with the one expected for atomic systems. We finally show that ICME could be measured for the first time for noble gases using state-of-the-art laser systems and for the quantum vacuum with near-future laser facilities like ELI and HiPER, providing in particular a test of the nonlinear behaviour of quantum vacuum at intensities below the Schwinger limit of 4.5x10^33 W/m^2.

Rizzo, C; Battesti, R; Fouché, M; Rikken, G L J A

2010-01-01T23:59:59.000Z

433

Interpreting Ulysses data using inverse scattering theory: Oblique Alfv\\'en waves  

E-Print Network [OSTI]

Solitary wave structures observed by the Ulysses spacecraft in the solar wind were analyzed using both inverse scattering theory as well as direct numerical integration of the derivative nonlinear Schr\\"odinger (DNLS) equation. Several of these structures were found to be consistent with soliton solutions of the DNLS equation. Such solitary structures have been commonly observed in the space plasma environment and may, in fact, be long-lived solitons. While the generation of these solitons may be due to an instability mechanism, e.g., the mirror instability, they may be observable far from the source region due to their coherent nature.

Wheeler, Harry R; Hamilton, R L

2015-01-01T23:59:59.000Z

434

Designing decommissioning into new reactor designs  

SciTech Connect (OSTI)

One of the lessons learned from decommissioning of existing reactors has been that decommissioning was not given much thought when these reactors were designed some three or four decades ago. Recently, the nuclear power has seen a worldwide resurgence and many new advanced reactor designs are either on the market or nearing design completion. Most of these designs are evolutionary in nature and build on the existing and proven technologies. They also incorporate many improvements and take advantage of the substantial operating experience. Nevertheless, by and large, the main factors driving the design of new reactors are the safety features, safeguards considerations, and the economic factors. With a large decommissioning experience that already exists in the nuclear industry, and with average decommissioning costs at around six hundred million dollars for each reactor in today's dollars, it is necessary that decommissioning factors also be considered as a part of the early design effort. Even though decommissioning may be sixty years down the road from the time they go on line, it is only prudent that new designs be optimized for eventual decommissioning, along with the other major considerations. (authors)

Devgun, J.S.; CHMM, Ph.D. [Nuclear Power Technologies, Sargent and Lundy LLC, Chicago, IL (United States)

2007-07-01T23:59:59.000Z

435

Design of intelligent interiors  

E-Print Network [OSTI]

Ubiquitous computing is transforming interior design by allowing utilities, goods and information to be delivered where and when we need them. How will new information technologies impact the design of interior spaces? ...

Bonanni, Leonardo Amerigo, 1977-

2005-01-01T23:59:59.000Z

436

Energy design for architects  

SciTech Connect (OSTI)

This book contains techniques for energy efficiency in architectural design. Many aspects are covered including: cost; comfort and health; energy use; the design process; and analytical techniques. 202 figs. (JF)

Shaw, A. (ed.)

1989-01-01T23:59:59.000Z

437

Full-waveform inversion in the time domain with an energy-weighted gradient  

SciTech Connect (OSTI)

When applying full-waveform inversion to surface seismic reflection data, one difficulty is that the deep region of the model is usually not reconstructed as well as the shallow region. We develop an energy-weighted gradient method for the time-domain full-waveform inversion to accelerate the convergence rate and improve reconstruction of the entire model without increasing the computational cost. Three different methods can alleviate the problem of poor reconstruction in the deep region of the model: the layer stripping, depth-weighting and pseudo-Hessian schemes. The first two approaches need to subjectively choose stripping depths and weighting functions. The third one scales the gradient with only the forward propagation wavefields from sources. However, the Hessian depends on wavefields from both sources and receivers. Our new energy-weighted method makes use of the energies of both forward and backward propagated wavefields from sources and receivers as weights to compute the gradient. We compare the reconstruction of our new method with those of the conjugate gradient and pseudo-Hessian methods, and demonstrate that our new method significantly improves the reconstruction of both the shallow and deep regions of the model.

Zhang, Zhigang [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Lin, Youzuo [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

438

Properties of solar plage from a spatially coupled inversion of Hinode SP data  

E-Print Network [OSTI]

The properties of magnetic fields forming an extended plage region in AR 10953 were investigated. Stokes spectra of the Fe I line pair at 6302 \\AA recorded by the spectropolarimeter aboard the Hinode satellite were inverted using the SPINOR code. The code performed a 2D spatially coupled inversion on the Stokes spectra, allowing the retrieval of gradients in optical depth within the atmosphere of each pixel, whilst accounting for the effects of the instrument's PSF. Consequently, no magnetic filling factor was needed. The inversion results reveal that plage is composed of magnetic flux concentrations (MFCs) with typical field strengths of 1520 G at log(\\tau)=-0.9 and inclinations of 10-15 degrees. The MFCs expand by forming magnetic canopies composed of weaker and more inclined magnetic fields. The expansion and average temperature stratification of isolated MFCs can be approximated well with an empirical plage thin flux-tube model. The highest temperatures of MFCs are located at their edges in all log(\\tau) ...

Buehler, D; Solanki, S K; van Noort, M

2015-01-01T23:59:59.000Z

439

Spectroscopic study of unique line broadening and inversion in low-pressure microwave generated water plasmas  

E-Print Network [OSTI]

It was demonstrated that low pressure (~0.2 Torr) water vapor plasmas generated in a 10 mm inner diameter quartz tube with an Evenson microwave cavity show at least two features which are not explained by conventional plasma models. First, significant (> 0.25 nm) hydrogen Balmer_ line broadening, of constant width, up to 5 cm from the microwave coupler was recorded. Only hydrogen, and not oxygen, showed significant line broadening. This feature, observed previously in hydrogen-containing mixed gas plasmas generated with high voltage dc and rf discharges was explained by some researchers to result from acceleration of hydrogen ions near the cathode. This explanation cannot apply to the line broadening observed in the (electrodeless) microwave plasmas generated in this work, particularly at distances as great as 5 cm from the microwave coupler. Second, inversion of the line intensities of both the Lyman and Balmer series, again, at distances up to 5 cm from the coupler, were observed. The line inversion suggest...

Mills, R L; Mayo, R M; Nansteel, M; Dhandapani, B; Phillips, J; Phillips, Jonathan

2004-01-01T23:59:59.000Z

440

Inverse neutrinoless double beta decay revisited: Neutrinos, Higgs triplets, and a muon collider  

SciTech Connect (OSTI)

We revisit the process of inverse neutrinoless double beta decay (e{sup -}e{sup -{yields}}W{sup -}W{sup -}) at future linear colliders. The cases of Majorana neutrino and Higgs triplet exchange are considered. We also discuss the processes e{sup -{mu}-{yields}}W{sup -}W{sup -} and {mu}{sup -{mu}-{yields}}W{sup -}W{sup -}, which are motivated by the possibility of muon colliders. For heavy neutrino exchange, we show that masses up to 10{sup 6} (10{sup 5}) GeV could be probed for ee and e{mu} machines, respectively. The stringent limits for mixing of heavy neutrinos with muons render {mu}{sup -{mu}-{yields}}W{sup -}W{sup -} less promising, even though this process is not constrained by limits from neutrinoless double beta decay. If Higgs triplets are responsible for inverse neutrinoless double beta decay, observable signals are only possible if a very narrow resonance is met. We also consider unitarity aspects of the process in case both Higgs triplets and neutrinos are exchanged. An exact seesaw relation connecting low energy data with heavy neutrino and triplet parameters is found.

Rodejohann, Werner [Max-Planck-Institut fuer Kernphysik, Postfach 103980, D-69029 Heidelberg (Germany)

2010-06-01T23:59:59.000Z

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


441

Dynamic Inversion for Hydrological Process Monitoring with Electrical Resistance Tomography Under Model Uncertainty  

SciTech Connect (OSTI)

We propose an approach for imaging the dynamics of complex hydrological processes. The evolution of electrically conductive fluids in porous media is imaged using time-lapse electrical resistance tomography. The related dynamic inversion problem is solved using Bayesian filtering techniques, that is, it is formulated as a sequential state estimation problem in which the target is an evolving posterior probability density of the system state. The dynamical inversion framework is based on the state space representation of the system, which involves the construction of a stochastic evolution model and an observation model. The observation model used in this paper consists of the complete electrode model for ERT, with Archie's law relating saturations to electrical conductivity. The evolution model is an approximate model for simulating flow through partially saturated porous media. Unavoidable modeling and approximation errors in both the observation and evolution models are considered by computing approximate statistics for these errors. These models are then included in the construction of the posterior probability density of the estimated system state. This approximation error method allows the use of approximate - and therefore computationally efficient - observation and evolution models in the Bayesian filtering. We consider a synthetic example and show that the incorporation of an explicit model for the model uncertainties in the state space representation can yield better estimates than a frame-by-frame imaging approach.

Lehikoinen, A.; Huttunen, J.M.J.; Finsterle, S.; Kowalsky, M.B.; Kaipio, J.P.

2009-08-01T23:59:59.000Z

442

COLLECTIVE EVIDENCE FOR INVERSE COMPTON EMISSION FROM EXTERNAL PHOTONS IN HIGH-POWER BLAZARS  

SciTech Connect (OSTI)

We present the first collective evidence that Fermi-detected jets of high kinetic power (L{sub kin}) are dominated by inverse Compton emission from upscattered external photons. Using a sample with a broad range in orientation angle, including radio galaxies and blazars, we find that very high power sources (L{sub kin} > 10{sup 45.5} erg s{sup -1}) show a significant increase in the ratio of inverse Compton to synchrotron power (Compton dominance) with decreasing orientation angle, as measured by the radio core dominance and confirmed by the distribution of superluminal speeds. This increase is consistent with beaming expectations for external Compton (EC) emission, but not for synchrotron self-Compton (SSC) emission. For the lowest power jets (L{sub kin} < 10{sup 43.5} erg s{sup -1}), no trend between Compton and radio core dominance is found, consistent with SSC. Importantly, the EC trend is not seen for moderately high power flat spectrum radio quasars with strong external photon fields. Coupled with the evidence that jet power is linked to the jet speed, this finding suggests that external photon fields become the dominant source of seed photons in the jet comoving frame only for the faster and therefore more powerful jets.

Meyer, Eileen T.; Fossati, Giovanni [Department of Physics and Astronomy, Rice University, Houston, TX 77005 (United States); Georganopoulos, Markos [Department of Physics, Joint Center for Astrophysics, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 (United States); Lister, Matthew L. [Department of Physics, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907 (United States)

2012-06-10T23:59:59.000Z

443

Effortless Incremental Design FMEA  

E-Print Network [OSTI]

effects analysis (FMEA) can be augmented to make incremental design FMEA much less of a burden for the

Christopher J. Price

1996-01-01T23:59:59.000Z

444

Protein Design Zhilei Chen  

E-Print Network [OSTI]

Protein Design Zhilei Chen Center for Biophysics and Computational Biology, University of Illinois of Illinois, Urbana, Illinois, U.S.A. INTRODUCTION Protein design refers to the ability to alter protein, and selectivity. To overcome this lim- itation, tailor-made biocatalysts must be developed by protein design

Zhao, Huimin

445

System Design Stage  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This chapter addresses translating the user-oriented functional design specifications into a set of technical, computer-oriented system design specifications; and designing the data structure and processes to the level of detail necessary to plan and execute the Programming and Installation Stages.

1997-05-21T23:59:59.000Z

446

Product Designation Process  

Broader source: Energy.gov [DOE]

The process for designating products was developed to maximize energy savings within Federal agencies, which are required by law to purchase products designated by the Federal Energy Management Program (FEMP) or qualified by ENERGY STAR. Products that meet FEMP-designated efficiency requirements are in the upper 25% of their class in energy efficiency.

447

ENVIRONMENTAL DESIGN CONSULTANTS + LIGHTING DESIGNERS | atelierten.com Sustainable Design  

E-Print Network [OSTI]

Strategies · Proposed Design & Alternate Energy Efficiency Measures · Earth Duct analysis · High Performance zero energy, carbon, and water performance. · Improve campus connectivity and exemplify best practices-fitting of renewable energy systems or other technologies. Create a high-performance, energy efficient, thermally

Massachusetts at Amherst, University of

448

Customization for tool design  

SciTech Connect (OSTI)

ICEMDDN capabilities have been adapted to the specific needs of the tool designer for creation of tool and gage designs. A customized graphic system allows the designer to concentrate on the design task, not on the mechanics of the graphs system. Prerequisites of customization include management support, user acceptance, user contributions, CAD/CAM operations support and cooperation from Control Data Corporation. Benefits from customization included a measurable increase in design production, better completion schedules, high quality drawings with better accuracy, and job satisfaction from participation in system development and improvement.

Michaelson, B.

1985-10-01T23:59:59.000Z

449

Foundation Design Handbook  

SciTech Connect (OSTI)

The purpose of this handbook is to provide information that will enable designers, builders, and homeowners to understand foundation design problems and solutions. The foundation of a house is a somewhat invisible and sometimes ignored component of the building. It is increasingly evident, however, that attention to good foundation design and construction has significant benefits to the homeowner and the builder, and can avoid some serious future problems. Good foundation design and construction practice means not only insulating to save energy, but also providing effective structural design as well as moisture, termite, and radon control techniques where appropriate.

Carmody, John [Center for Sustainable Building Research, University of Minnesota; Mosiman, Garrett [Center for Sustainable Building Research, University of Minnesota; Handeen, Daniel [Center for Sustainable Building Research, University of Minnesota; Huelman, Patrick [Cold Climate Housing Program, University of Minnesota; Christian, Jeffery [Oak Ridge National Laboratory

2013-10-01T23:59:59.000Z

450

Attached sunspace design analysis  

SciTech Connect (OSTI)

An introduction to new design analysis information for attached sunspaces is presented. The 28 sunspace reference designs are described. Note is taken of those designs (the semi-enclosed geometries) analyzed more recently than the previously published reports. The role of sensitivity studies is discussed, and some sample plots of sunspace performance sensitivity to key design parameters are presented. The monthly solar load ratio (SLR) correlations are reviewed with emphasis on the modified SLR used in the sunspace analysis. The application of the sunspace SLR correlations to monthly design analysis is outlined.

Jones, R.W.; McFarland, R.D.

1981-01-01T23:59:59.000Z

451

Seismic Imaging and Inversion: Application of Linear Theory (2012), Cambridge University Press, co-authored with Bob Stolt  

SciTech Connect (OSTI)

Extracting information from seismic data requires knowledge of seismic wave propagation and reflection. The commonly used method involves solving linearly for a reflectivity at every point within the Earth, but this book follows an alternative approach which invokes inverse scattering theory. By developing the theory of seismic imaging from basic principles, the authors relate the different models of seismic propagation, reflection and imaging - thus providing links to reflectivity-based imaging on the one hand and to nonlinear seismic inversion on the other. The comprehensive and physically complete linear imaging foundation developed presents new results at the leading edge of seismic processing for target location and identification. This book serves as a fundamental guide to seismic imaging principles and algorithms and their foundation in inverse scattering theory and is a valuable resource for working geoscientists, scientific programmers and theoretical physicists.

Weglein, Arthur B.; Stolt, Bob H.

2012-03-01T23:59:59.000Z

452

GEOPHYSICS, VOL. 52, NO. 3 (MARCH 1987): P 289-300, 6 FIGS., 5 TABLES Occam's inversion: A practical algorithm for generatlng smooth  

E-Print Network [OSTI]

: A practical algorithm for generatlng smooth models from electromagnetic sounding data Steven C. Constable*, Robert L. Parker*, and Catherine G. Constable* ABSTRACT The inversion of electromagnetic sounding data

Constable, Steve

453

A 1GMACS/mW MIXED-SIGNAL DIFFERENTIAL-CHARGE CID/DRAM PROCESSOR  

E-Print Network [OSTI]

matrix multiplication using internally analog fine-grain parallel computing, for real-time linearW of power. 1. Introduction Real-time computing of linear transforms on a battery- powered mobile platform contains a fine-grain parallel computational array, achieving a com- putational throughput of 1.1 GMACS

Genov, Roman

454

SciTech Connect: Performance of CID camera X-ray imagers at NIF...  

Office of Scientific and Technical Information (OSTI)

for Inertial Confinement Fusion II; Journal Volume: 8850; Conference: SPIE 2013 Optics + Photonics, August 25-29, 2013, San Diego, CA Research Org: Nevada Test SiteNational...

455

Improving CID, HCD, and ETD FT MS/MS degradome-peptidome identifications  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinementEtching.348 270 300 219Improvements to the SHDOM

456

Effectiveness of CID, HCD, and ETD with FT MS/MS for degradomic-peptidomic  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed NewcatalystNeutronEnvironmentZIRKLE FRUITYearEffect0/2002 Yun (Helen) He,analysis:

457

Inverse modeling of CO2 sources and sinks using satellite observations of CO2 from TES and surface flask measurements  

SciTech Connect (OSTI)

We infer CO2 surface fluxes using satellite observations of mid-tropospheric CO2 from the Tropospheric Emission Spectrometer (TES) and measurements of CO2 from surface flasks in a time-independent inversion analysis based on the GEOS-Chem model. Using TES CO2 observations over oceans, spanning 40 S 40 N, we find that the horizontal and vertical coverage of the TES and flask data are complementary. This complementarity is demonstrated by combining the datasets in a joint inversion, which provides better constraints than from either dataset alone, when a posteriori CO2 distributions are evaluated against independent ship and aircraft CO2 data. In particular, the joint inversion offers improved constraints in the tropics where surface measurements are sparse, such as the tropical forests of South America. Aggregating the annual surface-to-atmosphere fluxes from the joint inversion for the year 2006 yields 1.13 0.21 PgC for the global ocean, 2.77 0.20 PgC for the global land biosphere and 3.90 0.29 PgC for the total global natural flux (defined as the sum of all biospheric, oceanic, and biomass burning contributions but excluding CO2 emissions from fossil fuel combustion). These global ocean and global land fluxes are shown to be near the median of the broad range of values from other inversion results for 2006. To achieve these results, a bias in TES CO2 in the Southern Hemisphere was assessed and corrected using aircraft flask data, and we demonstrate that our results have low sensitivity to variations in the bias correction approach. Overall, this analysis suggests that future carbon data assimilation systems can benefit by integrating in situ and satellite observations of CO2 and that the vertical information provided by satellite observations of mid-tropospheric CO2 combined with measurements of surface CO2, provides an important additional constraint for flux inversions.

Nassar, Ray [University of Toronto; Jones, DBA [University of Toronto; Kulawik, SS [Jet Propulsion Laboratory, Pasadena, CA; Worden, JR [Jet Propulsion Laboratory, Pasadena, CA; Bowman, K [Jet Propulsion Laboratory, Pasadena, CA; Andres, Robert Joseph [ORNL; Suntharalingam, P [University of East Anglia, Norwich, United Kingdom; Chen, j. [University of Toronto; Brenninkmeijer, CAM [Max Planck Institut fur Chemie, Mainz; Schuck, TJ [Max Planck Institut fur Chemie, Mainz; Conway, T.J. [NOAA, Boulder, CO; Worthy, DE [Environment Canada

2011-01-01T23:59:59.000Z

458

On the GCR intensity and the inversion of the heliospheric magnetic field during the periods of the high solar activity  

E-Print Network [OSTI]

We consider the long-term behavior of the solar and heliospheric parameters and the GCR intensity in the periods of high solar activity and the inversions of heliospheric magnetic field (HMF). The classification of the HMF polarity structures and the meaning of the HMF inversion are discussed. The procedure is considered how to use the known HMF polarity distribution for the GCR intensity modeling during the periods of high solar activity. We also briefly discuss the development and the nearest future of the sunspot activity and the GCR intensity in the current unusual solar cycle 24.

Krainev, M B

2014-01-01T23:59:59.000Z

459

Measurements of possible type inversion in silicon junction detectors by fast neutron irradiation  

SciTech Connect (OSTI)

The successful application of silicon position sensitive detectors in experiments at the SSC or LHC depends on an accurate assessment of the radiation tolerance of this detector species. In particular, fast neutrons (E{sub av} = 1 MeV) produce bulk displacement damage that is projected, from estimated fluences, to cause increased generation (leakage) current, charge collection deficiencies, resistivity changes and possibly semiconductor type change or inversion. Whereas the leakage current increase was believed to be the major concern for estimated fluences of 10{sup 12} n/cm{sup 2} experiment year at the initial SSC luminosity of 10{sup 33}/cm{sup 2}-sec, increased luminosity and exposure time has raised the possible exposure to 10{sup 14} n/cm{sup 2}, which opens the door for the several other radiation effects suggested above to play observable and significant roles in detector degradation or change. 17 refs., 19 figs.

Li, Z.; Kraner, H.W.

1991-05-01T23:59:59.000Z

460

Narrowband inverse Compton scattering x-ray sources at high laser intensities  

E-Print Network [OSTI]

Narrowband x- and gamma-ray sources based on the inverse Compton scattering of laser pulses suffer from a limitation of the allowed laser intensity due to the onset of nonlinear effects that increase their bandwidth. It has been suggested that laser pulses with a suitable frequency modulation could compensate this ponderomotive broadening and reduce the bandwidth of the spectral lines, which would allow to operate narrowband Compton sources in the high-intensity regime. In this paper we, therefore, present the theory of nonlinear Compton scattering in a frequency modulated intense laser pulse. We systematically derive the optimal frequency modulation of the laser pulse from the scattering matrix element of nonlinear Compton scattering, taking into account the electron spin and recoil. We show that, for some particular scattering angle, an optimized frequency modulation completely cancels the ponderomotive broadening for all harmonics of the backscattered light. We also explore how sensitive this compensation ...

Seipt, D; Surzhykov, A; Fritzsche, S

2014-01-01T23:59:59.000Z

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


461

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

SciTech Connect (OSTI)

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.

Johnson, Timothy C.; Wellman, Dawn M.

2013-05-01T23:59:59.000Z

462

Constraints on Light Pseudoscalars Implied by Tests of the Gravitational Inverse-Square Law  

E-Print Network [OSTI]

The exchange of light pseudoscalars between fermions leads to a spin-independent potential in order g^4, where g is the Yukawa pseudoscalar-fermion coupling constant. This potential gives rise to detectable violations of both the weak equivalence principle (WEP) and the gravitational inverse-square law (ISL), even if g is quite small. We show that when previously derived WEP constraints are combined with those arisingfrom ISL tests, a direct experimental limit on the Yukawa coupling of light pseudoscalars to neutrons can be inferred for the first time (g_n^2/4pi < 1.6 \\times 10^-7), along with a new (and significantly improved) limit on the coupling of light pseudoscalars to protons.

Ephraim Fischbach; Dennis E. Krause

1999-06-03T23:59:59.000Z

463

IBIS: An inverse geometry Brillouin inelastic neutron spectrometer for the SNS  

SciTech Connect (OSTI)

The high power target station at the Spallation Neutron Source (SNS) currently has about 20 completed neutron scattering instruments. With a broad coverage of the momentum transfer (Q)-energy (E) space, these instruments serve an extensive user community. In an effort to further expand the scientific capabilities of the SNS instrument suites, we propose a low background, inverse geometry Brillouin inelastic spectrometer for the SNS which will expand the Q-E coverage of the current instrument suite and facilitate the study of inelastic and quasi-elastic scatterings at low Q values. The possible location for the proposed instrument is either beamline 8 which views the decoupled water moderator, or beamline 14A, which views a cold, coupled super critical hydrogen moderator. The instrument parameters, optimizations, and performances at these two beamline locations are discussed.

Zhao, J. K.; Robertson, Lee; Herwig, Kenneth W. [Instrument and Source Development Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Wildgruber, Christoph U. [Chemical and Engineering Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2013-02-15T23:59:59.000Z

464

Fast Inverse Nonlinear Fourier Transform For Generating Multi-Solitons In Optical Fiber  

E-Print Network [OSTI]

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.

Wahls, Sander

2015-01-01T23:59:59.000Z

465

Locomotive design and construction /  

E-Print Network [OSTI]

, and industrial service. Each of these three classes of service calls for many different types and sizes of locomotives, depending of course upon the track upon which the locomotive is operated; fuel and water supply; and length, tonnage and schedule of haul... Elements which determine running gears, swing of trucks, track conditions. Proportions of Locomotive 20 Comparison of various factors. Boilers 23 Types, boiler performance, details, fire box design and performance, grate design, ash pan design, petti...

Maris, James Clyde.

466

Mechanizing Exploratory Game Design  

E-Print Network [OSTI]

machine think? ” [223], Alan Turing revives what is perhapsone day be designed, to Alan Turing’s 1950 hand-simulation

Smith, Adam Marshall

2012-01-01T23:59:59.000Z

467

LSST Camera Optics Design  

SciTech Connect (OSTI)

The Large Synoptic Survey Telescope (LSST) uses a novel, three-mirror, telescope design feeding a camera system that includes a set of broad-band filters and three refractive corrector lenses to produce a flat field at the focal plane with a wide field of view. Optical design of the camera lenses and filters is integrated in with the optical design of telescope mirrors to optimize performance. We discuss the rationale for the LSST camera optics design, describe the methodology for fabricating, coating, mounting and testing the lenses and filters, and present the results of detailed analyses demonstrating that the camera optics will meet their performance goals.

Riot, V J; Olivier, S; Bauman, B; Pratuch, S; Seppala, L; Gilmore, D; Ku, J; Nordby, M; Foss, M; Antilogus, P; Morgado, N

2012-05-24T23:59:59.000Z

468

Motivational Design Patterns  

E-Print Network [OSTI]

Cunningham (2011). Gamification by Design: Im- plementingisbn: 1118089308. (2011b). “Gamification, Behaviorism andpp. 32–36. (2011). “Gamification is Bullshit. ” In: Wharton

Lewis, Chris

2013-01-01T23:59:59.000Z

469

Exercise Design Laboratory  

Broader source: Energy.gov [DOE]

The Emergency Operations Training Academy (EOTA), NA 40.2, Readiness and Training, Albuquerque, NM is pleased to announce the EXR231, Exercise Design Laboratory course

470

Mechanizing Exploratory Game Design  

E-Print Network [OSTI]

a small piece of advanced search algorithm design wisdom,search problems, the advanced search algorithms of theto use the advanced combinatorial search algorithms that

Smith, Adam Marshall

2012-01-01T23:59:59.000Z

471

Effective Design Strategies  

Broader source: Energy.gov [DOE]

As described in the Whole Building Design Guide (WBDG), all Federal agencies are required to follow the Guiding Principles for New Construction and Major Renovations, which include considerations...

472

Race to Zero Design Competition Webinar: Housing Design Best...  

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

Race to Zero Design Competition Webinar: Housing Design Best Practices Race to Zero Design Competition Webinar: Housing Design Best Practices November 18, 2014 1:00PM to 2:30PM EST...

473

CMOS VLSI DesignCMOS VLSI Design David Harris  

E-Print Network [OSTI]

1 CMOS VLSI DesignCMOS VLSI Design David Harris Harvey Mudd College Claremont, CA 91711 [David_Harris. (3e) Baker, CMOS: Circuit Design, Layout, and Simulation (2e) Weste & Harris, CMOS VLSI Design (3e

Harris, David Money

474

Cooperative Modeling and Design History Tracking Using Design Tracking Matrix  

E-Print Network [OSTI]

This thesis suggests a new framework for cooperative modeling which supports concurrency design protocol with a design history tracking function. The proposed framework allows designers to work together while eliminating design conflicts...

Kim, Jonghyun

2010-10-12T23:59:59.000Z

475

Closed-form Inverse Kinematic Solution for Anthropomorphic Motion in Redundant Robot Arms.  

E-Print Network [OSTI]

??As robots are increasingly migrating out of factories and research laboratories and into our everyday lives, they should move and act in environments designed for… (more)

Wang, Yuting

2013-01-01T23:59:59.000Z

476

Quantitative Monitoring for Enhanced Geothermal Systems Using Double-Difference Waveform Inversion with Spatially-Variant Total-Variation Regularization  

SciTech Connect (OSTI)

Double-difference waveform inversion is a promising tool for quantitative monitoring for enhanced geothermal systems (EGS). The method uses time-lapse seismic data to jointly inverts for reservoir changes. Due to the ill-posedness of waveform inversion, it is a great challenge to obtain reservoir changes accurately and efficiently, particularly when using timelapse seismic reflection data. To improve reconstruction, we develop a spatially-variant total-variation regularization scheme into double-difference waveform inversion to improve the inversion accuracy and robustness. The new regularization scheme employs different regularization parameters in different regions of the model to obtain an optimal regularization in each area. We compare the results obtained using a spatially-variant parameter with those obtained using a constant regularization parameter. Utilizing a spatially-variant regularization scheme, the target monitoring regions are well reconstructed and the image noise is significantly reduced outside the monitoring regions. Our numerical examples demonstrate that the spatially-variant total-variation regularization scheme provides the flexibility to regularize local regions based on the a priori spatial information without increasing computational costs and the computer memory requirement.

Lin, Youzuo [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Zhang, Zhigang [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

477

PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan1  

E-Print Network [OSTI]

PS-wave moveout inversion for tilted TI media: A physical-modeling study Pawan Dewangan1 , Ilya Tsvankin2 , Mike Batzle3 , Kasper van Wijk4 , and Matthew Haney5 ABSTRACT Mode-converted PS-waves can- and PS- waves can be inverted for the parameters of a horizontal TI layer with a tilted symmetry axis

478

Inverse modeling of emissions for local photo-oxidant pollution : Testing a new methodology with kriging constraints  

E-Print Network [OSTI]

Inverse modeling of emissions for local photo-oxidant pollution : Testing a new methodology. Abstract For chemistry-transport models operating at regional scales, surface emissions are the input data a methodology to optimize surface emissions at local scale i.e. to compute correction factors for the available

Menut, Laurent

479

Flow at Low Water Contents: A Simple Approach for Inverse Estimation of van Genuchten-Mualem Soil Hydraulic Parameters  

E-Print Network [OSTI]

. The amount and energy status of water in a soil can affect considerably the soil hydraulic properties. While1 Flow at Low Water Contents: A Simple Approach for Inverse Estimation of van Genuchten-Mualem Soil BP 7021, Burkina Faso Abstract The unsaturated soil hydraulic properties (the soil water

Paris-Sud XI, Université de

480

3D residual stress field in arteries: novel inverse method based on optical full-field measurements  

E-Print Network [OSTI]

-stretch and residual stresses arise in arteries largely due to the deposition of stable, highly elastic, elastin during1 3D residual stress field in arteries: novel inverse method based on optical full over time. This gives rise to residual stresses contributing to the homeostatic state of stress in vivo

Paris-Sud XI, Université de

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


481

Large-scale 3D inversion of marine magnetotelluric data: Case study from the Gemini prospect, Gulf of Mexico  

E-Print Network [OSTI]

of Mexico Michael S. Zhdanov1 , Le Wan1 , Alexander Gribenko1 , Martin Cuma1 , Kerry Key2 , and Steven Constable2 ABSTRACT Three-dimensional magnetotelluric MT inversion is an emerging technique for offshore.g., Constable et al., 1998; Hover- sten et al., 1998 . In addition, the much lower frequency range of MT data

Key, Kerry

482

Effects of adaptive refinement on the inverse EEG solution David M. Weinstein, Christopher R. Johnson and John A. Schmidt  

E-Print Network [OSTI]

on the surface of the scalp and the geometry and conductivity properties within the head, calculate the current and potential fields within the brain through an inverse procedure. To test these methods, we have constructed several finite element head models from magnetic resonance images (MRI) of a patient. The finite element

Utah, University of

483

Osteopontin is a downstream effector of the PI3-kinase pathway in melanomas that is inversely correlated with functional PTEN  

E-Print Network [OSTI]

Osteopontin is a downstream effector of the PI3-kinase pathway in melanomas that is inversely downstream of PI3K in melanoma and provides insight into how PTEN loss contributes to melanoma development upregulation, we sought to identify downstream components of this pathway that are upregulated when PTEN

Ringnér, Markus

484

A new sliced inverse regression method for multivariate response R. Coudreta, S. Girardb, J. Saraccoa,c,  

E-Print Network [OSTI]

to the same EDR space is provided. Thus, the proposed multivariate SIR method can be used properly on each, multivariate response regression analysis with a p-dimensional vector of regressors has been extensively) introduced sliced inverse regression (SIR) which is a well-known method to estimate the EDR space. The link

Paris-Sud XI, Université de

485

Inverse Problems and Imaging doi:10.3934/ipi.2013.7.xx Volume 7, No. 2, 2013, xxx  

E-Print Network [OSTI]

of Mathematics Michigan State University East Lansing, MI 48824, USA (Communicated by Mikko Salo) Abstract. We-DIMENSIONAL INVERSE GRAVIMETRY PROBLEM FOR ICE WITH SNOW CAPS Victor Isakov Department of Mathematics and Statistics Wichita State University Wichita, Kansas 67260, USA Shingyu Leung and Jianliang Qian Department

Qian, Jianliang

486

PII S0016-7037(00)00772-4 Rare earth element variations resulting from inversion of pigeonite and subsolidus  

E-Print Network [OSTI]

PII S0016-7037(00)00772-4 Rare earth element variations resulting from inversion of pigeonite ion mass spectrometry study of the rare earth elements (REEs) in the minerals of two samples of lunar earth element (REE) composi- tions of the minerals in the subgroups of lunar ferroan anortho- sites

487

Full-Wave Seismic Data Assimilation: Theoretical Background and Recent Advances Abstract--The seismological inverse problem has much in  

E-Print Network [OSTI]

Full-Wave Seismic Data Assimilation: Theoretical Background and Recent Advances PO CHEN 1 Abstract for estimating seismic source and Earth structure parameters in the form of weak-con- straint generalized inverse, in which the seismic wave equation and the associated initial and boundary conditions are allowed to con

Chen, Po

488

Learning Inverse Kinematics with Structured Prediction Botond Bocsi Duy Nguyen-Tuong Lehel Csato Bernhard Scholkopf Jan Peters  

E-Print Network [OSTI]

configuration space to oper- ational space. They are essential components in many robot applications, such as in manipulation and task-space control [1], [2]. Unlike industrial robots, less rigid and less accurate systems´o Bernhard Sch¨olkopf Jan Peters Abstract-- Learning inverse kinematics of robots with redun- dant degrees

489

Estimation of errors in the inverse modeling of accidental release of atmospheric pollutant: Application to the reconstruction  

E-Print Network [OSTI]

Estimation of errors in the inverse modeling of accidental release of atmospheric pollutant difficulty when inverting the source term of an atmospheric tracer dispersion problem is the estimation of the prior errors: those of the atmospheric transport model, those ascribed to the representativity

Paris-Sud XI, Université de

490

Can the Earth's harmonic spectrum be derived directly from1 the stochastic inversion of global travel-time data?2  

E-Print Network [OSTI]

Can the Earth's harmonic spectrum be derived directly from1 the stochastic inversion of global globe, to a statistical measure of the Earth's complexity: its spherical-harmonic spectrum.18 We follow averaged variance and harmonic spectrum; one can then determine the20 latter from a measurement

Boschi, Lapo

491

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

E-Print Network [OSTI]

hypothesis using a sampling-based stochastic model, based on a typical situation of gas explorationJoint inversion of seismic AVO and EM data for gas saturation estimation using a sampling- based stochastic model Jinsong Chen*, G. Michael Hoversten, and D. W. Vasco, Lawrence Berkeley National Laboratory

Chen, Jinsong

492

Lipschitz stability for a coefficient inverse problem for the non-stationary transport equation via Carleman estimate  

E-Print Network [OSTI]

, theory of nuclear reactors, etc. (see, e.g., the book of Anikonov, Kovtanyuk and Prokhorov [1], and [6 in a scattering medium, etc. (see, e.g., the book of Case and Zweifel [6]). Coefficient inverse problems (CIPs] and in the book of Romanov [23]. Uniqueness and existence results for CIPs for the non-stationary transport

493

Upper mantle structure of South America from joint inversion of waveforms and fundamental mode group velocities of Rayleigh waves  

E-Print Network [OSTI]

Upper mantle structure of South America from joint inversion of waveforms and fundamental mode tomographic S wave velocity model for the upper mantle beneath South America is presented. We developed three-dimensional (3-D) upper mantle S velocity model and a Moho depth model for South America, which

van der Lee, Suzan

494

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

E-Print Network [OSTI]

Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study National Laboratory SUMMARY Geological carbon sequestration involves large-scale injection of carbon is crucial for ensuring safe and reliable carbon storage (Bickle et al., 2007). Conventional analysis of time

Malcolm, Alison

495

Inversion of regional gravity gradient data over the Vredefort Impact Structure, South Africa Cericia Martinez and Yaoguo Li  

E-Print Network [OSTI]

Inversion of regional gravity gradient data over the Vredefort Impact Structure, South Africa- try data over the Vredefort Impact Structure in South Africa. With the rapidly growing field impact structure in South Africa. INTRODUCTION Gravity has long been used to study and characterize

496

Inverse Finite Element Modelling and Identification of Constitutive Parameters of UHS Steel Based on Gleeble Tensile Tests at High Temperature  

E-Print Network [OSTI]

identification method - associating a direct finite element model of Gleeble tests and an optimization module1 Inverse Finite Element Modelling and Identification of Constitutive Parameters of UHS Steel Based-2 ) hc heat transfer coefficient at interface between specimen and grips (W m-2 K) hth_eff effective

Boyer, Edmond

497

Influence of reduced carbon emissions and oxidation on the distribution of atmospheric CO2: Implications for inversion analyses  

E-Print Network [OSTI]

Influence of reduced carbon emissions and oxidation on the distribution of atmospheric CO2 carbon emissions. We used TransCom3 annual mean simulations from three transport models to evaluate carbon emission and oxidation processes in deriving inversion estimates of CO2 surface fluxes. Citation

Krakauer, Nir Y.

498

Geophys. J. Int. (1992) 108, 604-612 Kinematic inversion for qP-and qS-waves in inhomogeneous  

E-Print Network [OSTI]

Geophys. J. Int. (1992) 108, 604-612 Kinematic inversion for qP- and qS-waves in inhomogeneous; in original form 1991 March 26 SUMMARY We propose a kinematic inversion technique based on the first traveltimes of quasi-compressional as well as split quasi-shear waves, even if the initial unperturbed medium

Cerveny, Vlastislav

499

Directional Fluorescence Spectra of Laser Dye in Opal and Inverse Opal Photonic Crystals Lydia Bechger,* Peter Lodahl, and Willem L. Vos  

E-Print Network [OSTI]

Directional Fluorescence Spectra of Laser Dye in Opal and Inverse Opal Photonic Crystals Lydia dye molecules embedded in fcc photonic crystals with a large range of lattice parameters. Both emission was first reported in refs 6 and 7: titania inverse opals doped with laser dye showed a broadband

Vos, Willem L.

500

716 IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 36, NO. 4, OCTOBER 2011 On the Feasibility of a Matched-Field Inversion in a  

E-Print Network [OSTI]

716 IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 36, NO. 4, OCTOBER 2011 On the Feasibility of a Matched-Field Inversion in a Three-Dimensional Oceanic Environment Ignoring Out-of-Plane Propagation Alexios Korakas, Member, IEEE, and Frédéric Sturm Abstract--Inverse problems in ocean acoustics are based

Paris-Sud XI, Université de