中文说明：BP神经网络用于函数拟合与模式识别，本程序的性能已经达到较高水平，预报误差法参数辨识-松弛的思想，验证可用，独立成分分析算法降低原始数据噪声，是学习PCA特征提取的很好的学习资料。
English Description：
Fitting and pattern recognition of BP neural network to function, this program has reached a higher level of performance, prediction error method of parameter identification-flabby thinking, validation is available, independent component analysis algorithm to reduce the noise in the raw data, PCA is learning good study material feature extraction.