%?clear;?
%?clc;?
%?P=[-1?-1?2?2?4;0?5?0?5?7];?T=[-1?-1?1?1?-1];???%利用minmax函數(shù)求輸入樣本范圍?
%?net?=?newff（minmax（P）[81]{‘tansig‘‘purelin‘}‘trainrp‘）;???%5?隱含層神經(jīng)元個(gè)數(shù)
%?net.trainParam.show=50;
%?net.trainParam.lr=0.05;?
%?net.trainParam.epochs=300;
%?net.trainParam.goal=1e-5;?
%?[nettr]=train（netPT）;?
%?net.iw{11}%隱層權(quán)值?
%?net.b{1}%隱層閾值??
%?net.lw{21}%輸出層權(quán)值?
%?net.b{2}%輸出層閾值???
%?sim（netP）?
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%BP網(wǎng)絡(luò)的第一階段學(xué)習(xí)期（訓(xùn)練加權(quán)系數(shù)wki，wij）
%初始化
lr=0.05;err_goal=0.001;?????%lr為學(xué)習(xí)速率；err_goal為期望誤差最小值
max_epoch=10000;a=0.9;??????%max_epoch為訓(xùn)練的最大次數(shù)；a為慣性系數(shù)?
Oi=0;Ok=0;??????????????????%置隱含層和輸出層各神經(jīng)元輸出初值為0
%提供兩組訓(xùn)練集和目標(biāo)值（3輸入，2輸出）
X=[1?1;-1?-1;1?1];T=[1?1;1?1];
%初始化wki，wij（M為輸入節(jié)點(diǎn)j的數(shù)量；q為隱含層節(jié)點(diǎn)i的數(shù)量；L為輸出節(jié)點(diǎn)k的數(shù)量）
[MN]=size（X）;q=8;[LN]=size（T）;?%N為訓(xùn)練集對(duì)數(shù)量
wij=rand（qM）;wki=rand（Lq）;
wij0=zeros（size（wij））;wki0=zeros（size（wki））;
for?epoch=1:max_epoch
????%計(jì)算隱含層各神經(jīng)元的輸出
????NETi=wij*X;
????for?j=1:N
????????for?i=1:q
????????????Oi（ij）=2/（1+exp（-NETi（ij）））-1;
????????end
????end
????%計(jì)算輸出層各神經(jīng)元輸出
????NETk=wki*Oi;
????for?i=1:N
????????for?k=1:L
????????????Ok（ki）=2/（1+exp（-NETk（ki）））-1;
????????end
????end
????%計(jì)算誤差函數(shù)
????E=（（T-Ok）‘*（T-Ok））/2;
????if（E????%調(diào)整輸出層加權(quán)系數(shù)
????deltak=Ok.*（1-Ok）.*（T-Ok）;
????w=wki;
????wki=wki+lr*deltak*Oi‘+a*（wki-wki0）;
????wki0=w;
????%調(diào)整隱含層加權(quán)系數(shù)
????deltai=Oi.*（1-Oi）.*（deltak‘*wki）‘;
????w=wij;
????wij=wij+lr*deltai*X‘+a*（wij-wij0）;
????wij0=w;
end
epoch???????????????%顯示計(jì)算次數(shù)
%BP網(wǎng)絡(luò)的第二階段工作期（根據(jù)訓(xùn)練好的wki，wij和給定的輸入計(jì)算輸出）
X1=X;???????????????%給定輸入
%計(jì)算隱含層各神經(jīng)元輸出
NETi=wij*X1;
for?j=1:N
????for?i=1:q
????????Oi（ij）=2/（1+exp（-NETi（ij）））-1;
????end
end
%計(jì)算輸出層各神經(jīng)元的輸出
NETk=wki*Oi;
for?i=1:N
????for?k=1:L
????????Ok（ki）=2/（1+exp（-NETk（ki）））-1;
????end
end
Ok??????????????????%顯示網(wǎng)絡(luò)輸出層的輸出

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

?????文件???????2145??2016-03-14?15:33??EMD\BPnetwork.m

?????文件???????1081??2016-03-07?20:16??EMD\emd.m

?????文件????????206??2016-03-07?20:17??EMD\FFTAnalysis.m

?????文件????????909??2016-03-07?20:15??EMD\findpeaks.m

?????文件????????235??2016-03-07?20:17??EMD\HilbertAnalysis.m

?????文件???????1688??2016-03-07?20:16??EMD\plot_hht.m

?????文件???????1180??2016-03-14?14:40??EMD\test.m

?????目錄??????????0??2016-03-24?15:08??EMD

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

?????????????????7444????????????????????8