D-S证据理论数据融合，BP神经网络用于函数拟合与模式识别，预报误差法参数辨识-松弛的思想，是学习PCA特征提取的很好的学习资料，模拟数据分析处理的过程，有均匀线阵的CRB曲线。- D-S evidence theory data fusion, BP neural network function fitting and pattern recognition, Prediction Error Method for Parameter Identification- the idea of relaxation, Is a good learning materials to learn PCA feature extraction, Analog data analysis processing, There ULA CRB curve.