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  • 大小: 976KB
    文件類型: .rar
    金幣: 1
    下載: 0 次
    發(fā)布日期: 2021-01-11
  • 語言: Matlab
  • 標(biāo)簽: hht??emd??

資源簡介

用于經(jīng)驗(yàn)?zāi)B(tài)分解的matlab程序,這個版本的代碼比較簡單,容易看懂。

資源截圖

代碼片段和文件信息

function?imf?=?emd(x)
%?Empiricial?Mode?Decomposition?(Hilbert-Huang?Transform)
%?imf?=?emd(x)
%?Func?:?findpeaks

x???=?transpose(x(:));
imf?=?[];
while?~ismonotonic(x)
???x1?=?x;
???sd?=?Inf;
???while?(sd?>?0.1)?|?~isimf(x1)
??????s1?=?getspline(x1);
??????s2?=?-getspline(-x1);
??????x2?=?x1-(s1+s2)/2;
??????
??????sd?=?sum((x1-x2).^2)/sum(x1.^2);
??????x1?=?x2;
???end
???
???imf{end+1}?=?x1;
???x??????????=?x-x1;
end
imf{end+1}?=?x;

%?FUNCTIONS

function?u?=?ismonotonic(x)

u1?=?length(findpeaks(x))*length(findpeaks(-x));
if?u1?>?0?u?=?0;
else??????u?=?1;?end

function?u?=?isimf(x)

N??=?length(x);
u1?=?sum(x(1:N-1).*x(2:N)?u2?=?length(findpeaks(x))+length(findpeaks(-x));
if?abs(u1-u2)?>?1?u?=?0;
else??????????????u?=?1;?end

function?s

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????893??2008-03-13?11:49??plot_hht\emd.m

?????文件????????146??2007-08-26?00:42??plot_hht\findpeaks.m

?????文件?????958087??2007-01-25?14:59??plot_hht\HHT.pdf

?????文件?????102892??2007-04-28?15:57??plot_hht\Hum.wav

?????文件????????965??2008-04-24?13:36??plot_hht\plot_hht.m

?????目錄??????????0??2010-04-16?00:31??plot_hht

-----------?---------??----------?-----??----

??????????????1062983????????????????????6


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