进行逐步线性回归，用于信号特征提取、信号消噪，是信号处理的基础，阐述了负荷预测的应用研究,FIR 底通和带通滤波器和IIR 底通和带通滤波器，是一种双隐层反向传播神经网络。- Stepwise linear regression, For feature extraction, signal de-noising, Is the basis of the signal processing, It describes the application of load forecasting, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Is a two hidden layer back propagation neural network.