1) tetrahedral linear finite element
四面体线元
1.
Then the authors show that the tetrahedral linear finite element solution uh and the tetrahedral linear interpolation uI have superclose gradient for Poisson Equation and obtain the improved accuracy through Richardson extrapolation of the tetrahedral linear finite element solution uh.
改进三角元的积分恒等式,使之适用于拟一致四面体元,借此证明了泊松方程四面体线元梯度有超逼近现象,函数值Richardson外推可以提高精度。
2) elementary tetrahedron
元四面体
3) tetrahedral element
四面体单元
1.
Automatic generation algorithm of tetrahedral element mesh for considering movement free groundwater table;
潜水面变动的空间四面体单元网格自动生成方法
2.
With respect to the problem, a new 3-D FEM with tetrahedral element applied to t.
针对这一实际工作中遇到的问题,运用四面体单元的三维有限元数值方法对复杂条件下的电阻率异常进行了理论研究,文中选用了几例典型地质模型。
3.
By the introduction of element shape test operator,the shape quality of tetrahedral element is improved,and the thin tetrahedra are avoided in certain extent.
由于本文在单元提取算法中加入了单元形状测试算子,使得形成的四面体单元在形状质量上有所保证,在一定程度上避免了狭长单元的产
5) tetrahedral elements
四面体单元
1.
The method for evaluation of the unstructured grids is improved,and the Standard Deviation(STD) of dimensionless edges of tetrahedral elements is introduced for evaluating the mesh quality.
改进判断非结构化网格质量的方法,提出采用四面体单元无量纲棱长的标准差对网格质量进行评价。
2.
The sliver decomposition method is extended to deal with all kinds of isolated poor-quality tetrahedral elements generated by various meshing method for three-dimensional solids.
经过实例检验,本文提出的四面体单元网格优化算法健壮有效、易于实现,能够显著提高最差单元的质量。
6) Si-O tetrahedral units
Si-O四面体单元
补充资料:四面体
四面体
tetrahedron
四面体ltetr汕edn用;Terpa3皿p」 不全在同一平面上的四个点的集合构成的凸包,也可以说是这样一个立体图形,它具有四个三角形面,6条棱,6个顶点(在每个顶点上有三个棱相交).特别是,当6条棱相等时,为正四面体(代酗叮tetrahed-ron)—五种P肠to立体(凡tonic solids)之一如果正四面体的边长是“,则它的体积是 a3、厉 ‘‘一卫‘二几一澎0.1 179“j. 12一个四面体是一个三棱锥. 孕 BC3一3【补注】四面体也称为3单形(3·s】mplex).四面体的Seh巨flj符号(Sc城湘sylnbe】of a tetrahedron)是(3,3).
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