本文是快速折叠算法的算法描述，快速折叠算法用于检测隐含在数据中的周期性，在周期性检测上类似于FFT，常用在天文学中对脉冲星的探测。-This article describes the fast folding algorithm is an algorithm, fast folding algorithm for detecting hidden periodicity in the data, periodic testing is similar to the FFT, commonly