wangm23456 发表于 2016-12-19 15:15

用R的ceemd函数分解信号，得到的第一和最后一个IMF相同？

   七个IMF的前20个值如下，残余函数几乎为0，第一个IMF和最后一个完全一样。不知道为什么。


[,1]          [,2]          [,3]          [,4]          [,5]          [,6]          [,7]
    -3.423640e-03 -1.189538e-03 -1.224514e+034.470904e+02 -2.469753e+031436.9549933 -3.423640e-03
   1.020824e-023.269026e-04 -1.193871e+034.400586e+02 -2.495631e+031439.05333751.020824e-02
    -6.194500e-038.111029e-05 -1.163941e+034.341490e+02 -2.522167e+031441.5392642 -6.194500e-03
   2.167765e-03 -1.621989e-04 -1.134774e+034.293545e+02 -2.549361e+031444.41438072.167765e-03
   3.405377e-03 -7.588378e-04 -1.106321e+034.256524e+02 -2.577208e+031447.67775123.405377e-03
    -5.517728e-03 -1.218106e-03 -1.078553e+034.230140e+02 -2.605702e+031451.3263108 -5.517728e-03
    -8.357739e-044.646384e-07 -1.051471e+034.214092e+02 -2.634835e+031455.3557060 -8.357739e-04
   4.537997e-03 -2.019064e-04 -1.025024e+034.207977e+02 -2.664599e+031459.76135424.537997e-03
    -6.638468e-03 -5.282546e-04 -9.991529e+024.211327e+02 -2.694985e+031464.5384297 -6.638468e-03
2.136079e-031.626735e-03 -9.738575e+024.223685e+02 -2.725982e+031469.68111882.136079e-03
6.698798e-032.128007e-03 -9.490625e+024.244511e+02 -2.757579e+031475.18337166.698798e-03
-7.370895e-03 -1.628806e-03 -9.247054e+024.273254e+02 -2.789760e+031481.0388390 -7.370895e-03
-2.241024e-03 -3.590230e-03 -9.007795e+024.309302e+02 -2.822508e+031487.2399838 -2.241024e-03
1.006928e-03 -1.009333e-03 -8.772082e+024.351972e+02 -2.855808e+031493.77896671.006928e-03
-1.174564e-031.096100e-03 -8.539236e+024.400579e+02 -2.889641e+031500.6479306 -1.174564e-03
1.140058e-037.214645e-04 -8.308759e+024.454437e+02 -2.923992e+031507.83899631.140058e-03
-3.359846e-04 -8.848640e-04 -8.079951e+024.512756e+02 -2.958836e+031515.3442738 -3.359846e-04
-2.093071e-03 -5.641414e-04 -7.852329e+024.574800e+02 -2.994149e+031523.1558861 -2.093071e-03
1.025948e-021.425530e-03 -7.625493e+024.639840e+02 -3.029904e+031531.26596001.025948e-02
-7.106975e-038.434857e-04 -7.398367e+024.707086e+02 -3.066076e+031539.6666365 -7.106975e-03


wangm23456 发表于 2016-12-19 15:29

R的hht包

wangm23456 发表于 2016-12-19 15:42

白噪声幅值0.05，每个IMF计算100次

wangm23456 发表于 2016-12-19 15:42

白噪声幅值0.05，每个IMF计算100次

Apologize 发表于 2016-12-20 08:37

emd工具箱您有吗

wangm23456 发表于 2016-12-20 18:30

Apologize 发表于 2016-12-20 08:37
emd工具箱您有吗

没有

Apologize 发表于 2016-12-23 09:24

wangm23456 发表于 2016-12-20 18:30
没有

好吧谢谢

归零 发表于 2019-3-14 21:57

http://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CJFQ&dbname=CJFDLAST2017&filename=WSJC201709001&v=MTQxMDI3QmJiRzRIOWJNcG85RlpZUjhlWDFMdXhZUzdEaDFUM3FUcldNMUZyQ1VSTE9mWk9kckZDamhWTHZQTWo=
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