Results 101 to 110 of about 2,313 (216)

The Quick Measure of a Nurbs Surface Curvature for Accurate Triangular Meshing

open access: yesPolish Maritime Research, 2014
NURBS surfaces are the most widely used surfaces for three-dimensional models in CAD/ CAE programs. When a model for FEM calculation is prepared with a CAD program it is inevitable to mesh it finally. There are many algorithms for meshing planar regions.
Kniat Aleksander
doaj   +1 more source

Triangulating Trimmed NURBS Surfaces

open access: yes, 2008
. This paper describes techniques for the piecewise linear approximation of trimmed NURBS surfaces. The problem, called surface triangulation, arises from many applications in CAD and graphics. The new method generates triangular meshes that are adaptive
Chang Shu, Pierre Boulanger
core  

Sviluppo e rappresentazione digitale di superfici architettoniche complesse per la documentazione e il restauro

open access: yesDisegnare con, 2015
This research explains the methodology applied to the representation of the column shafts and capitals of the Temple C in the Selinunte Archaeological Site.Using mathematical auxiliary surfaces and NURBS modelling tools, textured highly-detailed meshes ...
Mirco Cannella
doaj  

Parallel Computation of RCS of Electrically Large Platform with Coatings Modeled with NURBS Surfaces

open access: yesInternational Journal of Antennas and Propagation, 2012
The significance of Radar Cross Section (RCS) in the military applications makes its prediction an important problem. This paper uses large-scale parallel Physical Optics (PO) to realize the fast computation of RCS to electrically large targets, which ...
Ying Yan   +4 more
doaj   +1 more source

Modelling of NURBS curves and surfaces in the projective space

open access: yes, 2009
In the first part I discuss ancestors of NURBS curves and surfaces, rather Ferguson, Beziere, Coons and B-spline curves and surfaces and furthermore B-spline functions.
Ondroušková, Jana
core  

Efficient Ray Tracing of Trimmed NURBS Surfaces

open access: yes, 2004
Statement under Oath Hereby I declare on oath that I have drafted the following thesis independently, that I have used the stated sources and means only, and that I have not presented this work at a different examination office previously.
Saarbrücken Germany   +4 more
core  

Tessellation of trimmed NURBS surfaces.

open access: yes, 2022
Tessellation of trimmed NURBS surfaces is classical problem in CAD/CAM, with long history and huge amount of research developed so far. We present and describe a tessellation algorithm suitable for visualization purposes in either offline or online ...
Safko, Martin
core  

Watertight trimmed NURBS

open access: yes, 2008
This paper addresses the long-standing problem of the unavoidable gaps that arise when expressing the intersection of two NURBS surfaces using conventional trimmed-NURBS representation. The solution converts each trimmed NURBS into an untrimmed T-Spline,
Ipson, Heather   +11 more
core   +1 more source

格利森制弧齿锥齿轮的齿面曲率特性研究

open access: yesJixie chuandong, 2009
According to spiral bevel gear machining process,the discrete points’ three-dimensional coordinates of Gleason spiral bevel gear tooth surface is calculated through the method of computer simulation.
李大伟, 苏智剑
doaj  

A Hybrid Fractal-NURBS Model for Characterizing Material-Specific Mechanical Surface Contact

open access: yesMachines
The reliability of mechanical systems hinges on analyzing the actual surface-to-surface contact area, which critically influences dynamic behavior, friction, material performance, and thermal dissipation. Uneven surfaces lead to incomplete contact, where
Leilei Zhang   +4 more
doaj   +1 more source

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