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Displaying records 51 to 60 of 243 records.
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51. Bicubic B-Spline Surface Approximation of Invariant Tori
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7731
Topic: Math
Published: 10/20/2010
Authors: Sita Ramamurti, David E. Gilsinn
Abstract: The invariant torus of a coupled system of Van der Pol oscillators is approximated using bicubic B-splines. The paper considers the case of strong nonlinear coupling. In particular, the shapes of invariant torii for the Van der Pol coupling parameter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906906

52. Bifurcations, Center Manifolds, and Periodic Solutions
Topic: Math
Published: 1/15/2009
Author: David E. Gilsinn
Abstract: Nonlinear time delay differential equations are well known to have arisen in models in physiology, biology, and population dynamics. They have also arisen in models of metal cutting processes. Machine tool chatter, from a process called regenerative ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51255

53. Biological Cell Feature Identification by a Modified Watershed-Merging Algorithm
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Math
Published: 11/24/2010
Authors: David E. Gilsinn, Kiran Bhadriraju, John T Elliott
Abstract: Biological cells are composed of many subsystems and organelles. The subsystem called the cytoskeleton is composed of long rod-shaped structures. They give the cell form and help attach the cell to the substrate and neighbors. One of the filaments is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906615

54. Bochner Subordination, Logarithmic Diffusion Equations, and Blind Deconvolution of Hubble Space Telescope Imagery and Other Scientific Data
Topic: Math
Published: 11/30/2010
Author: Alfred S Carasso
Abstract: Generalized Linnik processes and associated logarithmic diffusion equations can be constructed by appropriate Bochner randomization of the time variable in Brownian motion and the related heat conduction equation. Remarkably, generalized Linnik char ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903667

55. Bochner Subordination, Logarithmic Diffusion Equations, and Blind Deconvolution of Hubble Space Telescope Imagery and Other Scientific Data
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7632
Topic: Math
Published: 9/23/2009
Author: Alfred S Carasso
Abstract: Generalized Linnik processes and associated logarithmic diffusion equations can be constructed by appropriate Bochner randomization of the time variable in Brownian motion and the related heat conduction equation. Remarkably, generalized Linnik char ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903869

56. Boundary/Contour Fitted Grid Generation for Effective Visualizations in a Digital Library of Mathematical Functions
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7228
Topic: Math
Published: 9/1/2005
Authors: Bonita V Saunders, Qiming Wang
Abstract: Effective visualizations can help researchers obtain a more complete understanding of high-level mathematical functions that arise in mathematics, statistics, physics, fluid dynamics and other fields of the mathematical and physical sciences. Accord ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150023

57. Calibrating Image Roughness by Estimating Lipschitz Exponents, with Applications to Image Restoration
Topic: Math
Published: 3/3/2008
Author: Alfred S Carasso
Abstract: Most commonly occurring images f(x,y) are not smoothly differentiable functions of the variables x and y. Rather, these images display edges, localized sharp features, and other significant fine scale details or texture. Correct characterization and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51213

58. Changes
Topic: Math
Published: 1/3/2011
Author: Isabel M Beichl
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907604

59. Channel Coding for Code Excited Linear Prediction (CELP) Encoded Speech in Mobile Radio Applications
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5503
Topic: Math
Published: 8/1/1994
Authors: Ehud Bracha, Nariman Farvardin, Y Yesha
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900731

60. Character sums determined by low degree isogenies of elliptic curves
Topic: Math
Published: 7/25/2013
Authors: Dustin Moody, Christopher Rasmussen
Abstract: We look at certain character sums determined by isogenies on elliptic curves over finite fields. We prove a congruence condition for character sums attached to arbitrary cyclic isogenies, and produce explicit formulas for isogenies of degree m <= 8.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909562



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