定义了矩阵变换的最佳周期概念，给出了猫映射的最佳周期性定理。
The best transform period was secondly defined, and the best periodicity theorem for cat map was given.
文中利用并元变换的不进位性质，给出了一种构造最佳周期互补二元序列偶族的新方法。
By taking advantage of the characters of dyadic theory, a new method for constructing families of perfect periodic complementary binary sequences pairs (PCSPF) is proposed.
跨断层测量的复测周期主要由观测精度和断层位移速度决定，二者合理匹配的周期就是最佳周期。
A repeated period of measurement across the fault is mainly determined by observation accuracy and rate of deformation. It is the best period for they to match reasonably.
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