tetrahedron

The valence-band offsets of such systems are calculated by frozen potential method and their Joint density of states has been computed by tetrahedron method.(在此基础上，用冻结势方法计算了该超晶格系统的价带带阶；用四面体方法计算了该系统的联合态密度。)

So, this forms a tetrahedron, which forms the sp3 hybrid orbitals.(这就形成了一个四面体，它是由sp3杂化轨道形成的。)

The main structure unit of clay minerals contains silicon-oxygen tetrahedron and aluminium-oxygen octahedron.(其主要结构单元是硅一氧四面体和铝一氧八面体。)

The utility model relates to a tetrahedron triangle module toy which is formed by at least six tetrahedron triangle modules in a jointing combination way.(四面三角体模块玩具由至少六个四面三角体模块连体组合而成。)

The algorithm first construct a progressive mesh based on the source mesh and change the mesh into the simplest form, tetrahedron.(算法首先对原始三角网格构造一个累进网格，把三角网格简化成最简单的形式，四面体。)

In all of these complexes, the coordination geometry aroud copper (I) is best described as pseudo-tetrahedron.(此类配合物中，铜(I)原子的构型均为畸变的四面体构型。)

The internal structure of silica has a pyramid(tetrahedron) unit.(硅的内部结构是一个四面体。)

This is the website for the Tetrahedron Information System.(这是四面体信息系统的网站。)

This improved MT algorithm use standard tetrahedron as the initialized mesh unit instead of the tetrahedron dividing from the hexahedron.(该改进的MT算法用标准的正四面体单元取代传统的正六面体单元分割成的四面体单元作为MT算法的网格初始化单元。)

This paper presents the principle of secondary orientating by approximate tetrahedron for the first time.(本文在国内外首次提出并创建了近正四面体法二次定位原理。)