数学方法是部分子空间法，包括最小二乘法、SVM、神经网络、1_k近邻法,基于kaiser窗的双谱线插值FFT谐波分析。- Mathematics is part of the subspace, Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Dual-line interpolation FFT harmonic analysis kaiser windows.