triangular pyramid

For the two-dimensional problem, it can generate triangular element meshes and quadrilateral element mesh; for the three-dimensional problem, it can provide a grid cell including the tetrahedron, hexahedron, pyramid, wedge-shaped body and hybrid grids.

对于二维问题，可生成三角形单元网格和四边形单元网格；对于三维问题，提供的网格单元包括四面体、六面体、棱锥、楔形体及杂交网格等。

At last, the cases of three dimensional surrounding sound systems with cube array and triangular pyramid array models by using these formulas are illustrated for example in this paper.

文中导出了正方排列和正三角梭锥（正四面体）排列两种型式的三维（立体）声系统作为这组公式应用之例。

Test and study of buckling on the space truss composed triangular pyramid of Hebei Sports Hall

河北省体育馆三角锥网架方案的压杆稳定性能试验研究

In this paper two new cone vertex orbits, which are circle and arc and regular triangular pyramid lines, have been proposed and their complete conditions for exact reconstruction have been obtained.

我们提出了圆加垂直弧段及三棱锥的三棱线这两种新的锥顶轨迹，并研究了以其进行精确重建所需的完全性条件。

On the process of image segmentation, visual attention architecture is imported, the maritime noises are filtered successfully by building pyramid structure and making low-pass inversed triangular filter of small mask iteratively.

在感兴趣区域分割阶段，引入视觉注意力机制，通过构造金字塔结构以及迭代的小尺寸倒三角低通模板运算成功地滤除了海面波浪噪声。

Spherical Triangle Graphic Methods Based on the Relation of Spherical Triangle and Triangular Pyramid

基于球面三角与三棱锥关联的球面三角图解法