Hilbert-黄变换中的核心程序EMD[Rilling版]，程序中附加了详细的中英文注释以及参考文献，可以让使用者对EMD的原理更加明确，并对HHT的理解和应用大有裨益。-EMD,originally programed by Rilling, is a core subroutine in the Hilbert-Huang Transform(HHT). This subroutine attaches a detailed notes and references both in English and Chinese. It will greatly benefits the users on the principle of EMD. Furthermore,it will help the users and schoolers much more during the application and research of HHT.