中文说明：
利用emd分解轴承振动信号，并通过改进阈值函数来筛选IMF分量，最后对分量做包络分析，诊断出故障类型。
English Description：
Using the emd decomposition of bearing vibration signals, and through improved threshold function to filter the IMF component, finally, the component analysis of the envelope, diagnose the fault type.