中文说明：用于信号特征提取、信号消噪，抑制载波型差分相位调制，有较好的参考价值，旋转机械二维全息谱计算的实用例程，重要参数的提取，代码里有很完整的注释和解释。
English Description：
For signal feature extraction and denoising, suppressed carrier difference phase modulation, good references, calculation of two-dimensional holospectrum in rotating machinery and practical routines, extraction of important parameters, code has very complete the comment and explanation.