ECG信号处理获得各种features，包括P和T波的参数，该程序使用的数据来自mit database 如果要执行该程序，要修改ECG 信号的源文件目录-ECG signal processing to obtain a variety of features, including the P and T-wave parameters, the program uses data from mit database

利用bp神经网络的方法来实现ecg信号st段的模式识别。-The use of bp neural network approach to the realization of ecg signal st paragraph of pattern recognition.