小波包分析提取振动信号中的特征频率，利用自然梯度算法，有详细的注释。- Wavelet packet analysis to extract vibration signal characteristic frequency, Use of natural gradient algorithm, There are detailed notes.

具有丰富的参数选项,采用累计贡献率的方法，大学数值分析算法。- It has a wealth of parameter options, The method of cumulative contribution rate University of numerical analysis algorithms.