说明：  采用镜像延拓方法以解决EMD分解过程中存在的端点效应问题，经过实际测试，较传统EMD方法可有效解决端点效应问题。
(The mirror extension method is used to solve the end effect problem in the EMD decomposition process. After practical testing, the endpoint effect problem can be effectively solved by the traditional EMD method.)