tetrahedral theory

With respect to the problem, a new 3-D FEM with tetrahedral element applied to the theory study of resistivity anomaly under complicated conditions is presented in this paper, and several typical geological models are selected.

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。

In this paper, a new approach to judge molecular configuration of complex for transition elements by VSEPR theory is put forward on the basis of molecular orbit theory. Its application to octahedral field and tetrahedral field are introduced in detail.

在分子轨道理论的基础上，提出一种应用VSEPR理论判断过渡元素配合物分子构型的方法，并对其在八面体场、四面体场中的应用进行了详细的探讨。