1) a trihedral angle
三面角
2) trilobal section
三角截面
1.
Development of 167 dtex/38 f trilobal section bright soft package textured yarn;
167 dtex/38 f三角截面极亮松筒加弹丝开发
3) triangle face
三角面
1.
The solid is the polyhedron composed by the triangle faces.
在此结构中,实体为由三角面组成的多面体。
4) spherical trigonometry
球面三角
1.
The angle with the plumb line could be determined by the deviation of the vertical with spherical trigonometry.
发射点偏差对弹道导弹射击所引起的偏差可归结为垂线、法线与地心矢径的夹角不同和瞄准方位的不同,利用球面三角知识通过垂线偏差求出垂线与地心矢径的夹角,在诸元计算软件中适当修改一下诸元计算方法,使发射坐标系与标准发射坐标系完全重合,可以完全修正垂线偏差的影响,从而可以大大提高弹道导弹的射击精度。
2.
An axonometric drawing theory to draw an affine picture starting from two given affine picture is studied in affine coordinate system by spherical trigonometry, and three conditions are given out, one is the condition of drawing orthographic projection starting from two given affine picture, the other is the condition of drawing orthographic projection starting from.
用 3 个仿射图的投射方向构成 1 个仿射坐标系,同时也构成 1 个三棱锥,在此仿射坐标系中用球面三角重新研究由两个仿射图求第 3 个仿射图的投影作图理论 ——平行线束法。
3.
Based on the theories of spherical trigonometry and theoretical knowledge about projection,this paper introduces two ways(the calculation and diagrammatic representation)of finding the shortest path in a flying range and the conditions to ensure a plane to fly in this path.
根据球面三角理论和投影理论知识 ,用计算和图示两种方法给出了求解航程中最短路径和保证飞机在此路径中航行的条件 。
5) triangular facet
三角面片
1.
The STL(Stereolithography) file represent a solid model as a collection of triangular facets.
在STL文件中,实体表面的所有三角面片被无序地列出,不存在任何拓扑信息。
2.
According to geometrical information of the triangular facets and the slicing thickness,the times of traversing the triangular facets are reduced by using grouping matrix method.
根据STL模型中三角面片的几何信息和切片厚度,通过建立分组矩阵,减小了三角面片遍历的次数;通过构建三角面片之间的局部动态拓扑关系,减小了切片平面与三角面片的求交计算次数;并根据切片过程中大部分三角面片的毗邻关系不发生改变这一事实,提出了动态拓扑重构的算法,减小了切片过程中三角面片毗邻关系的查找次数,从而提高了切片算法的整体效率。
3.
A uniform treatment method for extracting the intersection chains and loops is used when the two intersecting triangular facets are coplanar.
针对传统STL模型布尔运算计算精度不高的问题,采用六元组结构记录相交三角面片的交线段,将相交三角面片分为4种情况,依据STL模型中三角面片的拓扑关系,采用递归搜索交线段记录的方法提取出交线链和交线环,对于共面的相交三角面片,采取统一处理方法提取交线链和交线环。
6) trigonal plane
三角平面
补充资料：三面角
有三个面的多面角。三面角的任意两个面角的和大于第三个面角。三面角的三个二面角的和大于二个直角，小于六个直角。三个面角都是直角的三面角称为直三面角。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条