利用最小二乘法进行拟合多元非线性方程，语音信号的采集与处理，数字信号处理课设，基于分段非线性权重值的Pso算法。- Multivariate least squares fitting method of nonlinear equations, Acquisition and Processing of the speech signal, digital signal processing class-based, Based on piecewise nonlinear weight va