本文对电力系统分析计算中的对称分量法进行了评述，并与相坐标法进行比较。
The widely used symmetrical coordinates method for power system analysis is reviewed and com-pared with the direct phase coordinates method.
通过合理地选择坐标轴，使对称连杆曲线的离散数据满足共轭对称性。
By properly setting the coordinate axis, the discrete data of a symmetric coupler curve are made to satisfy the conjugate symmetry.
利用SH散射的对称性和多极坐标方法构造了问题的位移解。
The displacement solution is constructed by applying the symmetry of scattering of SH-wave and the method of multi-polar coordinate system.
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