音频信号的分帧，fft，相关性分析。自己编的，可生成图像。其中也加了注释- Sub-frame of the audio signal, fft, correlation analysis

Hurst指数相关算法,具体描述了相关算法的求解和描述中。-Hurst exponent correlation algorithm, described in detail the correlation algorithm for solving and descr iption.