Results 141 to 150 of about 814 (179)

Improving Non-Uniform Rational B-splines' Knot Removal with Particle Swarm Optimization

2009 Sixth International Conference on Computer Graphics, Imaging and Visualization, 2009
Data reduction and shape accuracy are two things that come in mind when it comes to computer graphics research. One such algorithm used is Non-Uniform Rational B-splines (NURBS). The method used to reduce data in NURBS is via knot removal, which relies on an error tolerance value.
Ibrahim, Abdul Rahman, Shamsuddin, Siti Mariyam, Ali, Aida   +2 more
openaire   +2 more sources

Non-Uniform Rational B-Spline Based Iso-Geometric Analysis for a Class of Hydrodynamic Problems

International Journal of Maritime Engineering, 2020
Herein, we present the design and development of a ‘Non-uniform Rational B-spline (NURBS)’ based iso-geometric approach for the analysis of a number of ‘Boundary Value Problems (BVPs)’ relevant in hydrodynamics. We propose a ‘Potential Function’ based ‘Boundary Element Method (BEM)’ and show that it holds the advantage of being computationally ...
M Goel, R Sharma, S K Bhattacharyya, Tae-wan Kim   +3 more
openaire   +1 more source

An Efficient Scheme for Describing Airfoils Using Non-Uniform Rational B-Splines

Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 2012
In the well developed field of airfoil design there are a number of established schemes for describing airfoils, each with its own limitations and suitability to a particular application. Although less parsimonious, B-splines are often used to find solutions unconstrained by the characteristics of these schemes.
Francois J. L. Wessels, G. Venter, T. W. Von Backström   +2 more
openaire   +1 more source

Feedrate control for non-uniform rational B-spline motion command generation

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2006
This paper presents a real-time feedrate-controlled interpolator (FCI) for accurate feedrate control of computer numerical controlled (CNC) machine tools along non-uniform rational B-spline (NURBS) curves for precision machining. Unlike most of the existing interpolators that are developed based on the Taylor's expansion, the proposed method uses a ...
C W Cheng, M C Tsai, J Maciejowski
openaire   +1 more source

General Form Tolerance Evaluation Using Non-Uniform Rational B-Splines

Volume 3: 22nd Design Automation Conference, 1996
Abstract Tolerance evaluation is critical to quality assurance in modern manufacturing. In contrast to traditional measurement which relies on specific hard gauges, coordinate measuring machines provide more flexibility for dimensional measurement and tolerance evaluations.
Hong-Tzong Yau, Kuei-Wu Chen
openaire   +1 more source

Non-uniform rational B-spline-based minimum cost trajectory planning for autonomous robots

International Journal of Intelligent Systems Technologies and Applications, 2010
This paper proposes a new novel trajectory planning method by using two evolutionary algorithms namely Elitist non-dominated sorting genetic algorithm (NSGA-II) and differential evolution (DE) for an autonomous robot manipulator (STANFORD robot) whose workspace includes several obstacles.
R. Saravanan 0002, S. Ramabalan, P. Sriram, C. Balamurugan   +3 more
openaire   +1 more source

A Computational Model of Rat Cerebral Blood Flow using Non-Uniform Rational B-splines

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2007
Non-Uniform Rational B-splines (NURBS) surfaces can be used for a computer simulation of shapes. Some anatomical models of human or animal structures have been recently developed on that basis. We used positron-emission tomography (PET) and computed tomography (CT) data for NURBS modeling of anatomical structures and isotope uptake in the rat brain ...
Sergey V, Pushkin, Guennady I, Podoprigora, Laurent, Comas, Hatem, Boulahdour, Jean-Claude, Cardot, Michel, Baud, Yaroslav R, Nartsissov, Oleg, Blagosklonov   +7 more
openaire   +2 more sources

A novel hole patching algorithm for discrete geometry using non‐uniform rational B‐spline

International Journal for Numerical Methods in Engineering, 2011
AbstractA hole patching algorithm for discrete geometry using a parametric approach based on Non‐Uniform Rational B‐Spline (NURBS) curves and surfaces is being presented in this paper. This algorithm is focused on recovering the missing geometric information based on the neighboring points surrounding the topologically simple but geometrically complex ...
Kumar, Amitesh, Ito, Yasushi, Yu, Tzu-Yi, Ross, Douglas H., Shih, Alan M.   +4 more
openaire   +2 more sources

Iteration and optimization scheme for the reconstruction of 3D surfaces based on non-uniform rational B-splines

Computer-Aided Design, 2012
Curve or surface reconstruction is a challenging problem in the fields of engineering design, virtual reality, film making and data visualization. Non-uniform rational B-spline (NURBS) fitting has been applied to curve and surface reconstruction for many years because it is a flexible method and can be used to build many complex mathematical models ...
Wei-Cheng Xie 0001, Xiu-Fen Zou, Jian-Dong Yang, Jie-Bin Yang   +3 more
openaire   +1 more source

Generalizations of non-uniform rational B-splines via decoupling of the weights: theory, software and applications

Engineering with Computers, 2019
We introduce a new class of curves and surfaces by exploring multiple variations of non-uniform rational B-splines. These variations which are referred to as generalized non-uniform rational B-splines (GNURBS) serve as an alternative interactive shape design tool, and provide improved approximation abilities in certain applications. GNURBS are obtained
Alireza H. Taheri, Saeed Abolghasemi, Krishnan Suresh   +2 more
openaire   +1 more source