Results 41 to 50 of about 29,247 (265)

Unified Representation of Curves and Surfaces

open access: yesMathematics, 2021
In conventional modeling, shared control points can be employed to realize a unified representation for an object consisting of only curves or only surfaces touching one another.
Aizeng Wang, Gang Zhao, Chuan He
doaj   +1 more source

Isogeometric FEM-BEM coupled structural-acoustic analysis of shells using subdivision surfaces [PDF]

open access: yes, 2018
We introduce a coupled finite and boundary element formulation for acoustic scattering analysis over thin shell structures. A triangular Loop subdivision surface discretisation is used for both geometry and analysis fields.
Cirak, Fehmi   +3 more
core   +3 more sources

Interpolação por splines cúbicos paramétricos no Maple para a segmentação do contorno do ventrículo esquerdo humano

open access: yesREMAT, 2016
O coração humano é dividido em quatro câmaras: átrio direito, ventrículo direito, átrio esquerdo e ventrículo esquerdo. Através de um incrível processo de sincronia elas recebem e impulsionam o sangue para ser oxigenado e para levar oxigênio a todas as ...
José Sérgio Domingues
doaj   +3 more sources

Isogeometric treatment of large deformation contact and debonding problems with T-splines: a review

open access: yesCurved and Layered Structures, 2015
Within a setting where the isogeometric analysis (IGA) has been successful at bringing two different research fields together, i.e. Computer Aided Design (CAD) and numerical analysis, T-spline IGA is applied in this work to frictionless contact and mode ...
Dimitri Rossana
doaj   +1 more source

Niche partitioning as a mechanism for locally high species diversity within a geographically limited genus of blastoid. [PDF]

open access: yesPLoS ONE, 2018
Deltoblastus batheri and Deltoblastus delta occur concurrently in many Permian deposits from Timor. Closely related sister species living in direct proximity without alteration in feeding habit would be in direct violation of Lotka-Volterra dynamics ...
Ryan FitzGerald Morgan
doaj   +1 more source

Local T-spline surface skinning

open access: yesThe Visual Computer, 2012
Skinning or lofting remains a challenging problem in computer graphics and free-form surface design. Although it was addressed by many researchers, no sufficiently general solution has been proposed yet. In the interpolating approach, the incompatibility of the input NURBS curves are solved by knot insertion.
Nasri, Ahmad.   +2 more
openaire   +2 more sources

Automatic Generation of T-Splines with Extraordinary Points Based on Domain Decomposition of Quadrilateral Patches

open access: yesMathematics
Isogeometric analysis (IGA) is a numerical methodology for solving differential equations by employing basis functions that preserve the exact geometry of the domain. This approach is based on a class of mathematical functions known as NURBS (Non-Uniform
João Carlos L. Peixoto   +2 more
doaj   +1 more source

Five-Axis Tool Path Generation of Injection Mold Represented by T-Spline Surface

open access: yesAdvances in Polymer Technology, 2020
Injection molding is widely used in industries to produce polymeric products. At present, compound NURBS surfaces are commonly used to represent freeform surfaces in mold models.
Ce Shang   +5 more
doaj   +1 more source

An isogeometric finite element formulation for phase transitions on deforming surfaces [PDF]

open access: yes, 2019
This paper presents a general theory and isogeometric finite element implementation for studying mass conserving phase transitions on deforming surfaces.
Hughes, Thomas J. R.   +5 more
core   +3 more sources

Adaptive refinement of hierarchical T-splines [PDF]

open access: yesComputer Methods in Applied Mechanics and Engineering, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, L., de Borst, R.
openaire   +3 more sources

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