去除在心电信号采集过程中混入的肌电干扰 、工频干扰、基线漂移等噪声信号,避免噪声对心电信号特征点的识别和提取造成误判漏判。-Removal of mind into the process of signal acquisition of the EMG interference, frequency interference, baseline drift and other noise signals, to avoid noise on the ECG characteristic p