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Topic Area: Math
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Displaying records 201 to 210 of 232 records.
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201. Direct Blind Deconvolution II. Substitute Images and the Beak Method
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6570
Topic: Math
Published: 11/1/2000
Author: Alfred S Carasso
Abstract: The BEAK method is an FFT-based direct blind deconvolution technique previously introduced by the author, and applied to a limited but significant class of blurs that can be expressed as convolutions of 2-D symmetric L vy probability density function ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150807

202. Attractors, Chain Transitive Sets and Invariant Measures
Topic: Math
Published: 9/15/2000
Author: Fern Y Hunt
Abstract: This paper discusses an easy to implement procedure for approximating the long time behavior of iterates of maps. Applications include to finding the roots of a complex polynomial and approximating attractors. The method uses the theory of Markov ch ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150780

203. Zoltan: Data-Management Services For Parallel Applications Developer's Guide
Topic: Math
Published: 6/30/2000
Authors: K Devine, B Hendrickson, E Boman, M St. John, C Vaughan, William F Mitchell
Abstract: The Zoltan Dynamic Load-Balancing Library provides critical capability to a number of parallel applications. Zoltan includes a suite of algorithms for dynamically computing partitions of problems over sets of processors; geometric, tree-based and gra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150787

204. Zoltan: Data-Management Services For Parallel Applications; User's Guide
Topic: Math
Published: 6/30/2000
Authors: K Devine, B Hendrickson, E Boman, M St. John, C Vaughan, William F Mitchell
Abstract: The Zoltan Dynamic Load-Balancing Library provides critical capability to a number of parallel applications. Zoltan includes a suite of algorithms for dynamically computing partitions of problems over sets of processors; geometric, tree-based and gra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150788

205. On the Bifurcation From Continuous to Segmented Chip Formation in Metal Cutting
Topic: Math
Published: 2/6/2000
Authors: Timothy J Burns, Matthew A. Davies, Christopher J. Evans
Abstract: We describe a new approach to modeling chip formation in orthogonal machining. Metal cutting is interpreted as a nonlinear dynamical process with thermomechanical feedback, which is similar in many ways to an open chemical reactor. As the cutting s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150732

206. A First Stop Towards Photorealistic Rendering of Coated Surfaces and Computer Based Standards of Appearance
Topic: Math
Published: 11/1/1999
Authors: Fern Y Hunt, Egon Marx, G W Meyer, Theodore Vincent Vorburger, P A Walker, H B Westlund
Abstract: We seek to explore the feasibility of producing computer graphic images to visualize the color and gloss of surfaces using optical and surface topographical data.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150784

207. The DLMF Project: A New Initiative in Classical Special Functions
Topic: Math
Published: 6/1/1999
Author: Daniel W Lozier
Abstract: NIST (formerly, National Bureau of Standards) has started an ambitious project that aims to produce a successor to Abramowitz and Stegun's {\em Handbook of Mathematical Functions}, published by the National Bureau of Standards in 1964 and reprinted b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150783

208. Stable Quasicrystalline Sphere Packing
Topic: Math
Published: 3/1/1999
Authors: Eric J Cockayne, M Mihalkovic
Abstract: Wills (1990, J. Phys., Paris 51, 1061), found a method relating certain decagonal disk packings to decagonal sphere packings with high packing fractions. Applying this technique to the decagonal rectangle-triangle tiling generated by inflation, we ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850279

209. Logarithmic Convexity and the 'Slow Evolution' Constraint in Ill-Posed Initial Value Problems
Topic: Math
Published: 1/15/1999
Author: Alfred S Carasso
Abstract: This paper examines a wide class of ill-posed initial value problems for partial differential equations, and surveys logarithmic convexity results leading to Hoelder-continuous dependence on data for solutions satisfying prescribed bounds. The discus ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150727

210. On The Reversion of an Asymptotic Expansion and the Zeros of the Airy Functions
Topic: Math
Published: 1/15/1999
Authors: Bruce R Fabijonas, Frank William John Olver
Abstract: The general theories of the derivation of inverses of functions from their power series and asymptotic expansions are discussed and compared. The asymptotic theory is applied to obtain asymptotic expansions of the zeros of the Airy functions and the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150751



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