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You searched on: Topic Area: Modeling Sorted by: date

Displaying records 1 to 10 of 70 records.
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1. Advancing X-Ray Scattering Metrology Using Inverse Genetic Algorithms
Topic: Modeling
Published: 7/7/2016
Authors: Adam F Hannon, Daniel Franklin Sunday, Donald A Windover, Regis J Kline
Abstract: We compare the speed and effectiveness of two genetic optimization algorithms to the results of statistical sampling via a Markov Chain Monte Carlo algorithm to find which is the most robust method for determining real space structure in periodic ...

2. An Algorithm for Identifying Optimal Spreaders in a Random Walk Model of Network Communication
Series: Journal of Research (NIST JRES)
Topic: Modeling
Published: 5/10/2016
Author: Fern Y Hunt
Abstract: In a model of network communication based on a random walk in an undirected graph, what subset of nodes (subject to constraints on its size), enable the fastest spread of information? The dynamics of spread is described by a process dual to the movem ...

3. Shape Retrieval of Non-Rigid 3D Human Models
Topic: Modeling
Published: 4/26/2016
Authors: Afzal A Godil, David Pickup
Abstract: 3D models of humans are commonly used within computer graphics and vision, and so the ability to distinguish between body shapes is an important shape retrieval problem. We extend our recent paper which provided a benchmark for testing non-rigid ...

4. Bayesian Calibration of Transferable, Coarse-Grained Force Fields
Topic: Modeling
Published: 4/15/2016
Authors: Thomas William Rosch, Frederick R Phelan Jr., Paul N Patrone
Abstract: Generating and calibrating forces that are transferable across a range of state-points remains a challenging problem in coarse-grained (CG) molecular dynamics (MD). In this work, we present a Bayesian correction algorithm, inspired by ideas fro ...

5. A set-theoretic approach to analyzing timing uncertainty within cyber-physical systems
Topic: Modeling
Published: 2/26/2016
Author: Dhananjay Anand
Abstract: Clocks are deeply integrated into practically every cyber-physical system either explicitly as provenance for time-triggered actions, or implicitly in cases where cyber components operate in lock step with physical dynamics. Recognizing the criti ...

6. Percolation phase diagrams for multi-phase models built on the overlapping sphere model
Topic: Modeling
Published: 9/16/2015
Author: Edward Joseph Garboczi
Abstract: The overlapping sphere (OS) model gives a two-phase microstructure (matrix plus inclusions) that is useful for testing out composite material ideas and other applications, as well as serving as a paradigm of continuum percolation and phase transition ...

7. Kinetics of the Reactions of H and CH3 with n-Alkanes: Experiments with n-Butane and a Reevaluation Based on a Combustion Model Reaction Network Analysis
Topic: Modeling
Published: 7/16/2015
Authors: Jeffrey A Manion, David A Sheen, Iftikhar Ahmad Awan
Abstract: Presented is a combined experimental and modeling study of the kinetics of the reactions of H and CH3 with n-butane, a representative aliphatic fuel. Abstraction of H from n-alkane fuels creates alkyl radicals that rapidly decompose at high tempe ...

8. Methodology and Calculator for High Precision Regression Fits of Pyranometer Angular Responsivities and the Associated Uncertainties
Topic: Modeling
Published: 6/23/2015
Author: Matthew T Boyd
Abstract: An easy to implement method for accurately utilizing pyranometer incidence angle dependent calibration factors, or responsivities (uV/W/m2), along with the associated uncertainties has been developed. This method uses algorithms for creating single p ...

9. The Decoupled Potential Integral Equation for Time-Harmonic Electromagnetic Scattering
Topic: Modeling
Published: 5/28/2015
Authors: Felipe Vico, Leslie Greengard, Miguel Ferrando, Zydrunas Gimbutas
Abstract: We present a new formulation for the problem of electromagnetic scattering from perfect electric conductors. While our representation for the electric and magnetic fields is based on the standard vector and scalar potentials A, {phi} in the Lorenz ga ...

10. Design and modeling of an ultra-compact 2x2 nanomechanical plasmonic switch
Topic: Modeling
Published: 5/4/2015
Author: Vladimir A Aksyuk
Abstract: A 2x2 Mach-Zehnder optical switch design with a footprint of 0.5 um x 2.5 um using nanomechanical gap plasmon phase modulators [1] is presented. The extremely small footprint and modest optical loss are enabled by the strong phase modulation of gap p ...

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