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[ÇóÖú] matlab BPÉñ¾­ÍøÂ罨ÔìÈçÏ£¬Ô¤²âʱ£¬Ô¤²âÖµ·´¹éÒ»»¯±¨´í£¬Çó´óÉñÖ¸½Ì£¡£¡£¡£¡£¡

data=xlsread('Book1.xlsx','sheet1');%¶ÁÈ¡±í¸ñÖеÄÊý¾Ý
input=data(:,1:3);%½«Ç°ÈýÁÐ×÷ΪÊäÈë
output=data(:,4:6);%ºóÈýÁÐ×÷ΪÊä³ö
[pn,minp,maxp,tn,mint,maxt]=premnmx(input,output);
inputdata=pn';
outputdata=tn';
net=newff(minmax(inputdata),[18,3],{'tansig','purelin'},'trainlm');%½¨Á¢BPÉñ¾­ÍøÂç
net.trainParam.show=50;%ʱ¼äÉèÖÃ
net.trainParam.lr=0.01;%ѧϰÂÊ
net.trainParam.epochs=10000;%ѧϰ²½³¤
net.trainParam.goal=0.000001;%¾«¶È
[net,tr]=train(net,inputdata,outputdata);%ѵÁ·
data=xlsread('Book1.xlsx','sheet2');%¶ÁÈ¡±í¸ñÖеÄÊý¾Ý
P_test=data(:,1:3);%¶ÁȡǰÈýÁÐ
[p2n,minp,maxp]=premnmx(P_test);
intputdata=p2n';
T_test=sim(net,intputdata);%·ÂտģÄâ
test_T=postmnmx(T_test,mint,maxt);
v=net.iw{1,1};%Òþ²ãȨֵ
theta1=net.b{1};%Òþ²ããÐÖµ
w=net.lw{2,1};%Êä³ö²ãȨֵ
theta2=net.b{2};%Êä³ö²ããÐÖµ
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