We consider arbitrary bounded discrete time series. From its statistical feature, without any use of the Fourier transform, we find an almost periodic function which suitably characterizes the corresponding time series.

翻译：我们考虑任意有界离散时间序列。从其统计特征出发，无需使用傅里叶变换，即可找到一种适合刻画相应时间序列的几乎周期函数。