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Topic Area: Software

Displaying records 1 to 10 of 42 records.
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1. A New Convexity Measurement for 3D Meshes
Topic: Software
Published: 6/16/2012
Authors: Afzal A Godil, Zhouhui Lian
Abstract: This paper presents a novel convexity measurement for 3D meshes. The new convexity measure is calculated by minimizing the ratio of the summed area of valid regions in a mesh’s six views, which are projected on faces of the bounding box whose edg ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911359

2. Just Try
Topic: Software
Published: 11/1/2011
Author: Isabel M Beichl
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909403

3. A Comparison of hp-adaptive Strategies for Elliptic Partial Differential Equations (long version)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7824
Topic: Software
Published: 10/5/2011
Authors: William F Mitchell, Marjorie A McClain
Abstract: The hp version of the finite element method (hp-FEM) combined with adaptive mesh refinement is a particularly efficient method for solving partial differential equations because it can achieve a convergence rate that is exponential in the number ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909355

4. Salient Local 3D Features for 3D Shape Retrieval
Topic: Software
Published: 4/7/2011
Authors: Afzal A Godil, Asim Wagan
Abstract: In this paper we describe a new formulation for the 3D salient local features based on the voxel grid inspired by the Scale Invariant Feature Transform (SIFT). We use it to identify the salient keypoints (invariant points) on a 3D voxelized model and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907645

5. A Survey of hp-Adaptive Strategies for Elliptic Partial Differential Equations
Topic: Software
Published: 1/3/2011
Authors: William F Mitchell, Marjorie A McClain
Abstract: The hp version of the finite element method (hp-FEM) combined with adaptive mesh refinement is a particularly efficient method for solving partial differential equations because it can achieve a convergence rate that is exponential in the number of d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903240

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

7. Bicubic B-Spline Surface Approximation of Invariant Tori
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7731
Topic: Software
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

8. The hp-Multigrid Method Applied to hp-Adaptive Refinement of Triangular Grids
Topic: Software
Published: 3/16/2010
Author: William F Mitchell
Abstract: Recently the hp version of the finite element method has received increasing attention. This is an adaptive finite element approach in which adaptivity occurs in both the size, h, of the elements and in the order, p, of the approximating piecewise ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902558

9. A Collection of 2D Elliptic Problems for Testing Adaptive Algorithms
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7668
Topic: Software
Published: 2/26/2010
Author: William F Mitchell
Abstract: Adaptive grid refinement is a critical component of the improvements that have recently been made in algorithms for the numerical solution of partial differential equations (PDEs). The development of new algorithms and computer codes for the solutio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904956

10. Tensor Product B-spline Mesh Generation for Accurate Surface Visualizations in the NIST Digital Library of Mathematical Functions
Topic: Software
Published: 2/12/2010
Authors: Bonita V. Saunders, Qiming Wang
Abstract: We discuss the use of tensor product B-spline meshes to design accurate three dimensional graphs of high level mathematical functions for the National Institute of Standards and Technology (NIST) Digital Library of Mathematical Functions. The graph ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901114