现代信号处理中谱估计在matlab中的使用，用于图像处理的独立分量分析，pwm整流器的建模仿真，BP神经网络用于函数拟合与模式识别，复化三点Gauss-lengend公式求pi。- Modern signal processing used in the spectral estimation in matlab, Independent component analysis for image processing, Modeling and simulation pwm rectifier BP neural network function fitting and pattern recognition, Complex of three-point Gauss-lengend the Formula pi.