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.(在此基礎(chǔ)上，用凍結(jié)勢方法計算了該超晶格系統(tǒng)的價帶帶階；用四面體方法計算了該系統(tǒng)的聯(lián)合態(tài)密度。)

So, this forms a tetrahedron, which forms the sp3 hybrid orbitals.(這就形成了一個四面體，它是由sp3雜化軌道形成的。)

The main structure unit of clay minerals contains silicon-oxygen tetrahedron and aluminium-oxygen octahedron.(其主要結(jié)構(gòu)單元是硅一氧四面體和鋁一氧八面體。)

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.(四面三角體模塊玩具由至少六個四面三角體模塊連體組合而成。)

The algorithm first construct a progressive mesh based on the source mesh and change the mesh into the simplest form, tetrahedron.(算法首先對原始三角網(wǎng)格構(gòu)造一個累進網(wǎng)格，把三角網(wǎng)格簡化成最簡單的形式，四面體。)

In all of these complexes, the coordination geometry aroud copper (I) is best described as pseudo-tetrahedron.(此類配合物中，銅(I)原子的構(gòu)型均為畸變的四面體構(gòu)型。)

The internal structure of silica has a pyramid(tetrahedron) unit.(硅的內(nèi)部結(jié)構(gòu)是一個四面體。)

This is the website for the Tetrahedron Information System.(這是四面體信息系統(tǒng)的網(wǎng)站。)

This improved MT algorithm use standard tetrahedron as the initialized mesh unit instead of the tetrahedron dividing from the hexahedron.(該改進的MT算法用標(biāo)準(zhǔn)的正四面體單元取代傳統(tǒng)的正六面體單元分割成的四面體單元作為MT算法的網(wǎng)格初始化單元。)

This paper presents the principle of secondary orientating by approximate tetrahedron for the first time.(本文在國內(nèi)外首次提出并創(chuàng)建了近正四面體法二次定位原理。)