Boundary-processing-technique in EMD method and Hilbert transform

被引：85

作者：

DENG Yongjun WANG Wei QIAN Chengchun WANG Zhong DAI DejunNetwork Center Ocean University of Qingdao Qingdao China ^{[266003
]}

Physical Oceanography Laboratory Ocean Universily of Qingdao Qingdao China ^{[266003
]}

机构：

来源：

Chinese Science Bulletin | 2001年 / 11期

关键词：

EMD method; neural network; Hilbert spectrum;

D O I：

暂无

中图分类号：

O177.6 [积分变换及算子演算];

学科分类号：

070104 ;

摘要：

<正>By virtue of neural network, a series of signals is extended forward and backward, as a result, two additional maxima and two additional minima are obtained at both ends of the original data set, with which the EMD decomposition can be exactly achieved with cubic spline interpolation. Meanwhile, by using of neural network every IMF component can also be extended forward and backward, which effectively restrains the end effect, thus the veracious Hilbert spectra are achieved. Verifications of the sample signals and the actual surface elevation of sea waves show that the present extension method is relatively accurate.

引用

页码：954 / 961

页数：8