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Topic Area: Modeling
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Displaying records 21 to 30 of 131 records.
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21. Threshold Digraphs
Topic: Modeling
Published: 12/5/2012
Authors: Brian Dale Cloteaux, Michael Drew LaMar, Elizabeth R Moseman, James Michael Shook
Abstract: A digraph whose degree sequences have a unique vertex labeled realization is called threshold. In this paper we present several characterizations of threshold digraphs and show them to be equivalent. One of the characterizations is new, and allow ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912690

22. Fast Sequential Importance Sampling fo Estimate the Graph Reliability Polynomial
Topic: Modeling
Published: 11/5/2012
Authors: David G. Harris, Francis Sullivan, Isabel M Beichl
Abstract: The reliability polynomial of a graph measures the number of its connected subgraphs of various sizes. Algortihms based on sequential importance sampling (SIS) have been proposed to estimate a graph's reliahbility polynomial. We develop an improved ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905927

23. SysML extension for dynamical system simulation tools
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7888
Topic: Modeling
Published: 10/26/2012
Authors: Ion Matei, Conrad E Bock
Abstract: Computer-interpretable representations of system structure and behavior are at the center of designing today‰s complex systems. Engineers create and review such representations using graphical modeling languages that support specification, analys ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911750

24. Definite integrals using orthogonality and integral transforms
Topic: Modeling
Published: 10/19/2012
Authors: Howard S Cohl, Hans Volkmer
Abstract: We obtain definite integrals for products of associated Legendre functions with Bessel functions, associated Legendre functions, and Chebyshev polynomials of the first kind using orthogonality and integral transforms.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911945

25. Erratum: "Developments in determining the gravitational potential using toroidal functions"
Topic: Modeling
Published: 10/2/2012
Author: Howard S Cohl
Abstract: We fix several errors in "Developments in determining the gravitational potential using toroidal functions" (Astronomische Nachrichten, Vol. 321, Issue 5/6, p. 363).
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911688

26. Fourier Expansions for a Logarithmic Fundamental Solution of the Polyharmonic Equation
Topic: Modeling
Published: 9/28/2012
Author: Howard S Cohl
Abstract: In even-dimensional Euclidean space for integer powers of the Laplacian greater than or equal to the dimension divided by two, a fundamental solution for the polyharmonic equation has logarithmic behavior. We give two approaches for developing a Fou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910119

27. A comparison of methods for Non-rigid 3D shape retrieval
Topic: Modeling
Published: 9/26/2012
Authors: Zhouhui Lian, Afzal A Godil
Abstract: Non-rigid 3D shape retrieval has become an active and important research topic in content-based 3D object retrieval. The aim of this paper is to measure and compare the performance of state-of-the-art methods for non-rigid 3D shape retrieval. The pa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911880

28. An evaluation of local shape descriptors for 3D shape retrieval
Topic: Modeling
Published: 9/26/2012
Authors: Afzal A Godil, Sarah Y. Tang
Abstract: As the usage of 3D models increases, so does the importance of developing accurate 3D shape retrieval algorithms. A common approach is to calculate a shape descriptor for each object, which can then be compared to determine two objects‰ similarity. H ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911358

29. Variances of Cylinder Parameters Fitted to Range Data
Series: Journal of Research (NIST JRES)
Report Number: 117.015
Topic: Modeling
Published: 9/26/2012
Author: Marek Franaszek
Abstract: Industrial pipelines are frequently scanned with 3D imaging systems (e.g., LADAR) and cylinders are fitted to the collected data. Then, the fitted as-built model is compared with the as-designed model. Meaningful comparison between the two models ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910321

30. Preface
Topic: Modeling
Published: 9/2/2012
Authors: Andrew M Dienstfrey, Ronald F Boisvert
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911130



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