中文说明： 针对EMD方法的不足,是本科毕设的题目，BP神经网络用于函数拟合与模式识别，解耦，恢复原信号，处理信号的时频分析，计算多重分形非趋势波动分析。
English Description：
BP neural network is used for function fitting and pattern recognition, decoupling, recovering original signal, processing time-frequency analysis of signal, calculating multifractal non trend fluctuation analysis.