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ÔÚmatlabÀïÃæ£¬ÓÃÓÚ¹éÒ»»¯µÄ·½·¨¹²ÓÐÈýÖÖ:
£¨1£©premnmx¡¢postmnmx¡¢tramnmx
£¨2£©prestd¡¢poststd¡¢trastd
£¨3£©ÊÇÓÃmatlabÓïÑÔ×Ô¼º±à³Ì¡£
premnmxÖ¸µÄÊǹéÒ»µ½[£­1 1],prestd¹éÒ»µ½µ¥Î»·½²îºÍÁã¾ùÖµ¡££¨3£©¹ØÓÚ×Ô¼º±à³ÌÒ»°ãÊǹéÒ»µ½[0.1  0.9] ¡£¾ßÌåÓ÷¨¼ûÏÂÃæÊµÀý¡£
ΪʲôҪÓùéÒ»»¯ÄØ£¿Ê×ÏÈÏÈ˵һ¸ö¸ÅÄ½Ð×öÆæÒìÑù±¾Êý¾Ý£¬ËùÎ½ÆæÒìÑù±¾Êý¾ÝÊý¾ÝÖ¸µÄÊÇÏà¶ÔÓÚÆäËûÊäÈëÑù±¾Ìرð´ó»òÌØ±ðСµÄÑù±¾Ê¸Á¿¡£
ÏÂÃæ¾ÙÀý£º
m=[0.11 0.15 0.32 0.45 30;
      0.13 0.24 0.27 0.25 45];
ÆäÖеĵÚÎåÁÐÊý¾ÝÏà¶ÔÓÚÆäËû4ÁÐÊý¾Ý¾Í¿ÉÒÔ³ÉÎªÆæÒìÑù±¾Êý¾Ý£¨ÏÂÃæËù˵µÄÍøÂç¾ùÖµbp£©¡£ÆæÒìÑù±¾Êý¾Ý´æÔÚËùÒýÆðµÄÍøÂçѵÁ·Ê±¼äÔö¼Ó£¬²¢¿ÉÄÜÒýÆðÍøÂçÎÞ·¨ÊÕÁ²£¬ËùÒÔ¶ÔÓÚѵÁ·Ñù±¾´æÔÚÆæÒìÑù±¾Êý¾ÝµÄÊý¾Ý¼¯ÔÚѵÁ·Ö®Ç°£¬×îºÃÏȽøÐιéÒ»»¯£¬Èô²»´æÔÚÆæÒìÑù±¾Êý¾Ý£¬Ôò²»ÐèÒªÊÂÏȹéÒ»»¯¡£
¾ßÌå¾ÙÀý£º
close all
clear
echo on
clc
%BP½¨Ä£
%ԭʼÊý¾Ý¹éÒ»»¯
m_data=[1047.92 1047.83 0.39 0.39 1.0 3500 5075;
    1047.83 1047.68 0.39 0.40  1.0 3452 4912;
    1047.68 1047.52  0.40  0.41 1.0  3404 4749;
    1047.52  1047.27  0.41  0.42 1.0  3356 4586;
    1047.27  1047.41 0.42 0.43  1.0  3308  4423;
    1046.73  1046.74 1.70 1.80 0.75  2733  2465;
    1046.74  1046.82  1.80  1.78 0.75  2419 2185;
    1046.82 1046.73  1.78  1.75  0.75 2105  1905;
    1046.73  1046.48 1.75 1.85 0.70 1791  1625;
    1046.48  1046.03  1.85  1.82  0.70 1477 1345;
    1046.03 1045.33 1.82 1.68  0.70  1163  1065;
    1045.33  1044.95  1.68  1.71 0.70  849  785;
    1044.95  1045.21 1.71  1.72  0.70  533  508;
    1045.21 1045.64  1.72  1.70 0.70 567  526;
    1045.64 1045.44 1.70  1.69  0.70  601  544;
    1045.44 1045.78  1.69  1.69 0.70  635  562;
    1045.78 1046.20  1.69  1.52 0.75  667  580];
%¶¨ÒåÍøÂçÊäÈëpºÍÆÚÍûÊä³öt
pause
clc
p1=m_data(:,1:5);
t1=m_data(:,6:7);
p=p1';t=t1';
[pn,minp,maxp,tn,mint,maxt]=premnmx(p,t)
%ÉèÖÃÍøÂçÒþµ¥ÔªµÄÉñ¾­ÔªÊý(5~30ÑéÖ¤ºó5¸ö×îºÃ£©
n=5;
%½¨Á¢ÏàÓ¦µÄBPÍøÂç
pause
clc
net=newff(minmax(pn),[n,2],{'tansig','purelin'},'traingdm');
inputWeights=net.IW{1,1};
inputbias=net.b{1};
layerWeights=net.IW{1,1};
layerbias=net.b{2};
pause
clc
% ѵÁ·ÍøÂç
net.trainParam.show=50;
net.trainParam.lr=0.05;
net.trainParam.mc=0.9;
net.trainParam.epochs=200000;
net.trainParam.goal=1e-3;
pause
clc
%µ÷ÓÃTRAINGDMË㷨ѵÁ·BPÍøÂç
net=train(net,pn,tn);
%¶ÔBPÍøÂç½øÐзÂÕæ
A=sim(net,pn);
E=A-tn;
M=sse(E)
N=mse(E)
pause
clc
p2=[1046.20 1046.05 1.52 1.538 0.75;
    1046.05 1046.85 1.538 1.510 0.75;
    1046.85 1046.60 1.510 1.408 0.75;
    1046.60 1046.77 1.408 1.403 0.75;
    1046.77 1047.18 1.403 1.319 0.75];
p2=p2';
p2n=tramnmx(p2,minp,maxp);
a2n=sim(net,p2n);
a2=postmnmx(a2n,mint,maxt)
echo off
pause
clc
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pm=max(abs(p(i,: ))); p(i,: )=p(i,: )/pm;
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for i=1:27
p(i,: )=(p(i,: )-min(p(i,: )))/(max(p(i,: ))-min(p(i,: )));
end ¿ÉÒÔ¹éÒ»µ½0 1 Ö®¼ä
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[y1,PS] = mapminmax(x1). ÆäÖÐx1 ÊÇÐèÒª¹éÒ»µÄ¾ØÕó y1Êǽá¹û
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y2 = mapminmax('apply',x2,PS)
µ±ÐèÒª°Ñ¹éÒ»µÄÊý¾Ý»¹Ô­Ê±£¬¿ÉÒÔÓÃÒÔÏÂÃüÁî
x1_again = mapminmax('reverse',y1,PS)


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[ Last edited by yingzhilian on 2009-6-9 at 20:55 ]
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