能够对一段数据进行med处理，对一段信号降噪进行降噪处理，减少噪声对信号的影响，使信号在之后的处理中其故障特征频率能更好地表现出来。(It can process a section of data with MED, reduce the noise of a section of signal, reduce the impact of noise on the signal, and make the fault characteristic frequency of the signal