We consider bounded discrete time series. From its statistical feature, without any use of the Fourier transform, we find a suitable almost periodic function which approximates the corresponding time series in a local time interval.

翻译：我们考虑有界离散时间序列。基于其统计特征，在不使用傅里叶变换的情况下，我们找到了一个合适的几乎周期函数，该函数在局部时间区间内逼近相应的时间序列。