▍1. 窗函数 功率谱
说明: 通过窗函数滑动计算信号的功率谱,原处理为脑电各频段信号,可以更改用于其他。并提供了一个信号文件(The power spectrum of the signal is calculated by sliding the window function. The original processing is EEG signal of each frequency band, which can be changed for other applications)