插值与拟合，解方程，数据分析，分析了该信号的时域、频域、倒谱，循环谱等,雅克比迭代求解线性方程组课设。- Interpolation and fitting, solution of equations, data analysis, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Jacobi iteration for solving linear equations class-based.