对16导联脑电信号进行预处理，设计陷波器去除50Hz工频，采用低通滤波及求和平均两种方法去除伪迹，同时作出16导联脑电信号预处理后的频谱图-On the 16-lead EEG preprocessing, design notch filter to remove 50Hz frequency, low-pass filtering and summation of the average two ways to remove artifacts, while making 16-lead EEG spectrum after pretreatment