孕产期胎儿心跳QRS波的提取，采用相关算法实现，比较有意义-Maternal fetal heartbeat QRS wave extraction, using the relevant algorithm, more meaningful

用KNN实现QRS波群的检测，使用MIT-BIH数据库，用MATLAB编程仿真-Achieve detection QRS complex using KNN method using MIT-BIH , simulation using MATLAB programming