用群论方法给出了一种具有特殊本征对称性的四阶张量在各点群晶体中的形式，并将其应用于声光散射转动效应的研究，获得了有意义的结果。
The form of a four-rank tensor with the particular intrinsic symmetry for a variety of crystal symmetry is given by the use of the group theory method.
以二阶张量为损伤变量，推导了依赖于损伤变量的弹性模量表达式，利用一个等价状态，建立损伤岩体的本构关系。
Then the expression of damage-dependent elasticity tensor is deduced and the constitutive equations of damaged rock are built by using an equivalent state.
本交给出了惯量张量用其三个主要不变量表示的特征方程，为求特征值提供了一种代数方程解法；
This paper presents the eigen equation of inertial tensor expressed by the three principal invariants, which is an algebra-equation solution to calculate eigen value;
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