Symmetry operation and lattice vibration in cubic crystal

立方晶体的 对称 操作与晶格振动

The symmetry operation on a set algebra P ( x ) is induced mapping by doubly mapping on X ;

集合代数P（X）上的 对称 运算都是X上的对合映射所导出的映射；

On the basis of symmetry and tiling theories the study is separated into two parts : surface subdivision and property operation of components .

针对七述现象，本文选取二维表面作为研究对象，以数学中的 对称 性及平面铺砌等相关理论为基础，将二维表面的形式问题分解为两个层级进行研究：表面细分和单元组件属性 操作。

In the model of one machine infinite-bus system the symmetry of the dynamic stability of pump storage machines under generator and pump operation conditions is proved in this paper based on the dynamic stability analysis .

以单机无穷大系统为对象，采用考虑阻尼绕组作用的动态稳定分析模型，对 抽水蓄能电机在发电工况和抽水 工况下的动态稳定性进行分析。

A quick and safe encryption arithmetic of symmetry is proposed which has the same arithmetic in encryption and decryption without arithmetic logical operation .

给出了一种加密速度快，安全性高，加密算法和解密算法相同，且不需进行算术逻辑 运算等特点的 对称加密算法。

The order-preserving doubly mapping on a Boolean algebra equivalents to symmetry operation ;

布尔代数上保序对合映射与 对称 运算等价；

Three dimensional orientation face bow was used to evaluate the symmetry of facial shape in the time of 4-6 months after operation .

术后4～6个月，用三维定位面弓对面部软组织外形进行测量，观察患者面形是否 对称。

A 3-D cycle symmetry finite elment model of the low-pressure turbine rotor with connecting bolts is built . The press and relax force on the connecting bolts under various operation conditions are computed by commercial FEA software .

采用商用有限元软件建立了螺栓连接转子结构三维循环 对称有限元计算模型，计算了发动机各个 功率下连接螺栓的压紧力/松弛力。

All symmetry operation and generating operation of the point groups were listed and their group multiplication table of maximal proper point group 10 22 was filled in .

填写出了最大的固有点群 1022的群乘表。

As well as all symmetry operation were derived the point groups could be obtained .

全部 对称 操作确定了，点群也就确定了。

By using stereographic projection of each point group all symmetry operation and generating operation of the point groups are listed and group multiplication table of maximal proper point group 822 is filled in .

运用八方晶系各点群的极赤投影图，列出了各点群的所有 对称 操作；填出了固有点群822的群乘表。

This paper discusses the relations between the symmetry operation on lattices and the order-preserving doubly mapping .

本文讨论了格上 对称 运算和保序对合映射之间的关系。

In octagonal coordinate system defined by us the matrixes of the point groups symmetry operation are derived .

运用坐标变换和群论在自定义的八方坐标系中，推导出八方晶系点群所有 对称 操作的矩阵。

A Detecting Method for Small Moving Targets Based on Symmetry Difference Operation

基于 图像 对称差分 运算的运动小目标检测方法

Phase component method is abc phase coordinate calculation it does not require symmetry network parameters and meet the needs of power system operation .

相分量法是按abc相坐标进行计算，它不要求网络参数 对称且能满足系统 运行的需要。

The Symmetry of the Dynamic Stability of Pump Storage Machines under Generator and Pump Operation Conditions

抽水蓄能电机发电与抽水 工况动态稳定性的 对称 性

Results the height of the two eyes lid was nearly symmetry after operation the effect of rectifing katotropia was satisfactory .

结果 术后双眼睑高度基本 对称，下斜视矫正效果良好。