中文说明：对于初学者具有参考意义，包括随机梯度算法，相对梯度算法，采用了小波去噪的思想，IDW距离反比加权方法，有PMUSIC 校正前和校正后的比较，基于kaiser窗的双谱线插值FFT谐波分析。
English Description：
Thought is of reference value for beginners, including the stochastic gradient algorithm, relative gradient algorithm, using wavelet denoising and IDW inverse distance weighted method, correction PMUSIC before and after correction of the comparison, based on Kaiser window double spectrum line interpolation FFT algorithm for harmonic analysis.