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

Displaying records 11 to 20 of 70 records.
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11. A geometric description of nonreciprocity in coupled two-mode systems
Topic: Modeling
Published: 10/16/2014
Authors: Leonardo M. Ranzani, Jose Alberto Aumentado
Abstract: We explore the concept of nonreciprocity in coupled two-mode systems using a geometric mapping to the Poincaré sphere. From this perspective, we recast the requirements for nonreciprocity in terms of rotation and inversion symmetry arguments for t ...

12. 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 ...

13. A study of shear banding in polymer solutions
Topic: Modeling
Published: 6/4/2014
Authors: Michael E Cromer, Glenn Fredrickson, Gary Leal
Abstract: In a recent letter (Cromer et al. Phys. Fluids 2013) we showed, for the first time, the existence of a steady shear-banded velocity profile for a polymer solution with an underlying monotonic constitutive curve. The driving mechanism is the coupling ...

14. 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 ...

15. 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 ...

16. An Optimization Approach to Multiple Sequence Alignment
Topic: Modeling
Published: 7/1/2003
Authors: Fern Y Hunt, Anthony J Kearsley, H H Wan
Abstract: The problem of multiple sequence alignment is recast as an optimization problem using Markov decision theory. One seeks to minimize the expected or average cost of alignment subject to data-derived constraints. In this setting the problem is equiva ...

17. Artificial Intelligence Tools for Failure Event Data Management and Probability Risk Analysis for Failure Prevention
Topic: Modeling
Published: 10/25/2009
Authors: Jeffrey T Fong, Pedro Vincente Marcal
Abstract: Over the last thirty years, much research has been done on the development of failure event databases and fatigue modeling of crack growth in pressure vessels and piping. According to a USNRC report (NUREG/CR6674, 2000), results of a fatigue crack g ...

18. Assessing microscale heterogeneity in batches of reference materials using microbeam XRF
Topic: Modeling
Published: 5/17/2011
Authors: John L Molloy, John R Sieber
Abstract: Principal component analysis (PCA), microbeam X-ray Fluorescence Spectrometry (µXRF), and Monte Carlo simulations are used to illustrate a methodology for assessing the sample microheterogeneity for large sets of materials. PCA is demonstrated to de ...

19. 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 ...

Series: Journal of Research (NIST JRES)
Report Number: 116-5
Topic: Modeling
Published: 10/5/2011
Authors: Kevin L Mills, James J Filliben
Abstract: Experimenters characterize the behavior of simulation models for data communications networks by measuring multiple responses under selected parameter combinations. The resulting multivariate data may include redundant responses reflecting aspects of ...

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