Results 91 to 100 of about 17,342 (259)
Corner-cutting subdivision scheme for quadrilateral meshes(四边形网格的削角细分)
Zhejiang Daxue xuebao. Lixue ban, 2004 提出了一种四边形网格的削角细分方法(Corner-Cutting Subdivision Scheme).每细分一次，四边形网格数目增加为原来的两倍，两次细分结果相当于一次二分对偶细分(Binary Dual Subdivision）和一个旋转.细分算法釆用线性细分加平滑的形式，具体地讲平滑是釆用两次重复平均的方法，因此其生成曲面具有C1连续性.而且由于这种细分方法对网格几何操作简单，所得网格数据量增长相对缓慢，更适合于3D图像重构及网络传输等应用领域..
WANGJian-wei(王建卫) +2 more
doaj +1 more source
On the approximation in the smoothed finite element method (SFEM)
, 2009 This letter aims at resolving the issues raised in the recent short communication [1] and answered by [2] by proposing a systematic approximation scheme based on non-mapped shape functions, which both allows to fully exploit the unique advantages of the ...
Bordas +14 more
core +1 more source
On Optimal Bilinear Quadrilateral Meshes [PDF]
, 2000 The novelty of this work is in presenting interesting error properties of two types of asymptotically ''optimal'' quadrilateral meshes for bilinear approximation. The first type of mesh has an error equidistributing property where the maximum interpolation error is asymptotically the same over all elements.
openaire +2 more sources
Advanced Energy Materials, EarlyView.Multiscale perspectives on how excess charges in soft lead halide perovskites induce operational instability in photovoltaic devices are presented. Localized carriers formed under thermodynamic non‐equilibrium states modify atomistic interactions and drive lattice distortions, accelerating device degradation.
Joo‐Hong Lee +6 more
wiley +1 more source
Advanced Intelligent Discovery, EarlyView.We discovered novel materials with giant dielectric constants by combining first‐principles phonon calculations and machine learning. Screening 525 perovskites identified six candidates. RbNbO3 was synthesized under pressure and showed ε ≈ 800–1000. This validates our framework as a powerful tool for high‐performance dielectric materials discovery.
Hiroki Moriwake +9 more
wiley +1 more source
A curvature theory for discrete surfaces based on mesh parallelity
, 2009 We consider a general theory of curvatures of discrete surfaces equipped with edgewise parallel Gauss images, and where mean and Gaussian curvatures of faces are derived from the faces' areas and mixed areas.
Bobenko, Alexander I. +2 more
core +4 more sources
MathematicsIsogeometric 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
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Delaunay triangulation and computational fluid dynamics meshes [PDF]
In aerospace computational fluid dynamics (CFD) calculations, the Delaunay triangulation of suitable quadrilateral meshes can lead to unsuitable triangulated meshes.
Mount, David M., Posenau, Mary-Anne K.
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E3S Web of Conferences, 2018 Zero-Inertia (ZI) models are used in overland flow simulation due to their mathematical simplicity, compared to more complex formulations such as Shallow Water (SW) models.
Fernández-Pato Javier +2 more
doaj +1 more source
Multigrid solution of the Navier-Stokes equations on triangular meshes [PDF]
A Navier-Stokes algorithm for use on unstructured triangular meshes is presented. Spatial discretization of the governing equations is achieved using a finite element Galerkin approximation, which can be shown to be equivalent to a finite volume ...
Jameson, Antony +2 more
core +1 more source