BP神经网络用于函数拟合与模式识别，用于信号特征提取、信号消噪，相控阵天线的方向图（切比雪夫加权），多目标跟踪的粒子滤波器，matlab程序运行时导入数据文件作为输入参数。-BP neural network function fitting and pattern recognition, For feature extraction, signal de-noising, Phased array antenna pattern (Chebyshev weights), Multi-target tracking particle filter, Import data files as input parameters matlab program is running.