中文说明：
EMD或者LMD的能量密度与其平均周期的乘积K值，当K值发生较大变化的时候，证实该分量为白噪声，可以剔除，将剩下的分量进行重构，达到去噪的目的。
English Description：
The product K value of the energy density of EMD or LMD and its average period. When the K value changes greatly, it is confirmed that the component is white noise, which can be eliminated, and the remaining components can be reconstructed to achieve the purpose of denoising.