📄 bp神经网络的设计实例.mht
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<TD vAlign=3Dtop height=3D200>
<TABLE cellSpacing=3D0 cellPadding=3D10 align=3Dleft =
border=3D0>
<TBODY>
<TR>
<TD></TD></TR></TBODY></TABLE>
<P>
<P>
<P>
<P>
<P><BR>=C0=FD1 =
=B2=C9=D3=C3=B6=AF=C1=BF=CC=DD=B6=C8=CF=C2=BD=B5=CB=E3=B7=A8=D1=B5=C1=B7 =
BP=20
=
=CD=F8=C2=E7=A1=A3<BR>=D1=B5=C1=B7=D1=F9=B1=BE=B6=A8=D2=E5=C8=E7=CF=C2=A3=
=BA<BR>=CA=E4=C8=EB=CA=B8=C1=BF=CE=AA <BR> p =
=3D[-1 -2 3 =20
1 <BR> -1 1 5=20
=
-3]<BR>=C4=BF=B1=EA=CA=B8=C1=BF=CE=AA t =3D [-1 -1 1 =
1]</P>
<P>=BD=E2=A3=BA=B1=BE=C0=FD=B5=C4 MATLAB =
=B3=CC=D0=F2=C8=E7=CF=C2=A3=BA <BR><BR>close all <BR>clear <BR>echo on=20
<BR>clc <BR>% =
NEWFF=A1=AA=A1=AA=C9=FA=B3=C9=D2=BB=B8=F6=D0=C2=B5=C4=C7=B0=CF=F2=C9=F1=BE=
=AD=CD=F8=C2=E7 <BR>% TRAIN=A1=AA=A1=AA=B6=D4 BP =
=C9=F1=BE=AD=CD=F8=C2=E7=BD=F8=D0=D0=D1=B5=C1=B7=20
<BR>% SIM=A1=AA=A1=AA=B6=D4 BP =
=C9=F1=BE=AD=CD=F8=C2=E7=BD=F8=D0=D0=B7=C2=D5=E6=20
<BR>pause =20
<BR>% =C7=C3=C8=CE=D2=E2=BC=FC=BF=AA=CA=BC =
<BR>clc <BR>% =B6=A8=D2=E5=D1=B5=C1=B7=D1=F9=B1=BE <BR>% P =
=CE=AA=CA=E4=C8=EB=CA=B8=C1=BF=20
<BR>P=3D[-1, -2, =
3, =20
1; =
-1, =20
1, 5, -3];<BR>% T =
=CE=AA=C4=BF=B1=EA=CA=B8=C1=BF <BR>T=3D[-1, -1,=20
1, 1]; <BR>pause; <BR>clc <BR>% =
=B4=B4=BD=A8=D2=BB=B8=F6=D0=C2=B5=C4=C7=B0=CF=F2=C9=F1=BE=AD=CD=F8=C2=E7 =
=
<BR>net=3Dnewff(minmax(P),[3,1],{'tansig','purelin'},'traingdm')<BR>%&nbs=
p;=20
=
=B5=B1=C7=B0=CA=E4=C8=EB=B2=E3=C8=A8=D6=B5=BA=CD=E3=D0=D6=B5 =
<BR>inputWeights=3Dnet.IW{1,1} <BR>inputbias=3Dnet.b{1}=20
<BR>% =
=B5=B1=C7=B0=CD=F8=C2=E7=B2=E3=C8=A8=D6=B5=BA=CD=E3=D0=D6=B5 =
<BR>layerWeights=3Dnet.LW{2,1}=20
<BR>layerbias=3Dnet.b{2} <BR>pause <BR>clc <BR>% =
=C9=E8=D6=C3=D1=B5=C1=B7=B2=CE=CA=FD=20
<BR>net.trainParam.show =3D 50; <BR>net.trainParam.lr =
=3D 0.05;=20
<BR>net.trainParam.mc =3D 0.9; =
<BR>net.trainParam.epochs =3D 1000;=20
<BR>net.trainParam.goal =3D 1e-3; <BR>pause <BR>clc =
<BR>% =20
=B5=F7=D3=C3 TRAINGDM =CB=E3=B7=A8=D1=B5=C1=B7 BP =
=CD=F8=C2=E7 <BR>[net,tr]=3Dtrain(net,P,T); <BR>pause=20
<BR>clc <BR>% =B6=D4 BP =
=CD=F8=C2=E7=BD=F8=D0=D0=B7=C2=D5=E6 <BR>A =3D sim(net,P) <BR>% =20
=BC=C6=CB=E3=B7=C2=D5=E6=CE=F3=B2=EE <BR>E =3D T - A =
<BR>MSE=3Dmse(E) <BR>pause <BR>clc <BR>echo=20
off </P>
<P>=C0=FD2 =
=B2=C9=D3=C3=B1=B4=D2=B6=CB=B9=D5=FD=D4=F2=BB=AF=CB=E3=B7=A8=CC=E1=B8=DF =
BP =
=CD=F8=C2=E7=B5=C4=CD=C6=B9=E3=C4=DC=C1=A6=A1=A3=D4=DA=B1=BE=C0=FD=D6=D0=A3=
=AC=CE=D2=C3=C7=B2=C9=D3=C3=C1=BD=D6=D6=D1=B5=C1=B7=B7=BD=B7=A8=A3=AC=BC=B4=
L-M=20
=
=D3=C5=BB=AF=CB=E3=B7=A8=A3=A8trainlm=A3=A9=BA=CD=B1=B4=D2=B6=CB=B9=D5=FD=
=D4=F2=BB=AF=CB=E3=B7=A8=A3=A8trainbr=A3=A9=A3=AC=D3=C3=D2=D4=D1=B5=C1=B7=
BP=20
=
=CD=F8=C2=E7=A3=AC=CA=B9=C6=E4=C4=DC=B9=BB=C4=E2=BA=CF=C4=B3=D2=BB=B8=BD=BC=
=D3=D3=D0=B0=D7=D4=EB=C9=F9=B5=C4=D5=FD=CF=D2=D1=F9=B1=BE=CA=FD=BE=DD=A1=A3=
=C6=E4=D6=D0=A3=AC=D1=F9=B1=BE=CA=FD=BE=DD=BF=C9=D2=D4=B2=C9=D3=C3=C8=E7=CF=
=C2MATLAB =D3=EF=BE=E4=C9=FA=B3=C9=A3=BA =
<BR>=CA=E4=C8=EB=CA=B8=C1=BF=A3=BAP=20
=3D [-1:0.05:1]=A3=BB =
<BR>=C4=BF=B1=EA=CA=B8=C1=BF=A3=BArandn(=A1=AFseed=A1=AF,78341223)=A3=BB =
<BR>T =3D=20
sin(2*pi*P)+0.1*randn(size(P))=A3=BB =
<BR>=BD=E2=A3=BA=B1=BE=C0=FD=B5=C4 MATLAB =B3=CC=D0=F2=C8=E7=CF=C2=A3=BA =
</P>
<P>close all <BR>clear <BR>echo on <BR>clc <BR>%=20
=
NEWFF=A1=AA=A1=AA=C9=FA=B3=C9=D2=BB=B8=F6=D0=C2=B5=C4=C7=B0=CF=F2=C9=F1=BE=
=AD=CD=F8=C2=E7 <BR>% TRAIN=A1=AA=A1=AA=B6=D4 BP =
=C9=F1=BE=AD=CD=F8=C2=E7=BD=F8=D0=D0=D1=B5=C1=B7<BR>% =
SIM=A1=AA=A1=AA=B6=D4 BP=20
=C9=F1=BE=AD=CD=F8=C2=E7=BD=F8=D0=D0=B7=C2=D5=E6 =
<BR>pause =20
<BR>% =C7=C3=C8=CE=D2=E2=BC=FC=BF=AA=CA=BC =
<BR>clc <BR>% =B6=A8=D2=E5=D1=B5=C1=B7=D1=F9=B1=BE=CA=B8=C1=BF =
<BR>% P =CE=AA=CA=E4=C8=EB=CA=B8=C1=BF=20
<BR>P =3D [-1:0.05:1]; <BR>% T =
=CE=AA=C4=BF=B1=EA=CA=B8=C1=BF <BR>randn('seed',78341223);=20
T =3D sin(2*pi*P)+0.1*randn(size(P)); <BR>% =
=BB=E6=D6=C6=D1=F9=B1=BE=CA=FD=BE=DD=B5=E3=20
<BR>plot(P,T,'+'); <BR>echo off <BR>hold on;=20
=
<BR>plot(P,sin(2*pi*P),':'); =20
<BR>% =
=BB=E6=D6=C6=B2=BB=BA=AC=D4=EB=C9=F9=B5=C4=D5=FD=CF=D2=C7=FA=CF=DF =
<BR>echo on <BR>clc <BR>pause <BR>clc=20
<BR>% =
=B4=B4=BD=A8=D2=BB=B8=F6=D0=C2=B5=C4=C7=B0=CF=F2=C9=F1=BE=AD=CD=F8=C2=E7 =
=
<BR>net=3Dnewff(minmax(P),[20,1],{'tansig','purelin'});=20
<BR>pause <BR>clc <BR>echo off =
<BR>clc<BR>disp('1. L-M=20
=D3=C5=BB=AF=CB=E3=B7=A8 TRAINLM'); disp('2. =
=B1=B4=D2=B6=CB=B9=D5=FD=D4=F2=BB=AF=CB=E3=B7=A8 TRAINBR');=20
=
<BR>choice=3Dinput('=C7=EB=D1=A1=D4=F1=D1=B5=C1=B7=CB=E3=B7=A8(1,2):'); =
<BR>figure(gcf);=20
=
<BR>if(choice=3D=3D1) &nbs=
p; =20
<BR> echo=20
on =20
<BR> =20
clc =20
<BR> % =B2=C9=D3=C3 L-M =
=D3=C5=BB=AF=CB=E3=B7=A8 TRAINLM=20
<BR> =20
=
net.trainFcn=3D'trainlm'; =
=20
<BR> =20
pause =20
<BR> =20
clc =20
<BR> % =20
=
=C9=E8=D6=C3=D1=B5=C1=B7=B2=CE=CA=FD &=
nbsp; =20
<BR> net.trainParam.epochs =3D=20
500; =20
<BR> net.trainParam.goal =3D=20
1e-6; =20
<BR> =20
=
net=3Dinit(net); =20
<BR> % =20
=
=D6=D8=D0=C2=B3=F5=CA=BC=BB=AF &=
nbsp; =20
<BR> =20
pause =20
<BR> =20
=
clc<BR>elseif(choice=3D=3D2) &nb=
sp;=20
<BR> echo=20
on =20
<BR> =20
clc =20
<BR> % =
=B2=C9=D3=C3=B1=B4=D2=B6=CB=B9=D5=FD=D4=F2=BB=AF=CB=E3=B7=A8=20
=
TRAINBR =20
<BR> =20
=
net.trainFcn=3D'trainbr'; =
=20
<BR> =20
pause =20
<BR> =20
clc =20
<BR> % =20
=
=C9=E8=D6=C3=D1=B5=C1=B7=B2=CE=CA=FD &=
nbsp; =20
<BR> net.trainParam.epochs =3D=20
500; =20
<BR> =20
=
randn('seed',192736547); =
<BR> net =3D=20
init(net); =20
<BR> % =20
=
=D6=D8=D0=C2=B3=F5=CA=BC=BB=AF &=
nbsp; =20
<BR> =20
pause =20
<BR> =20
clc =
<BR>end=20
<BR>% =
=B5=F7=D3=C3=CF=E0=D3=A6=CB=E3=B7=A8=D1=B5=C1=B7 BP =CD=F8=C2=E7 =
<BR>[net,tr]=3Dtrain(net,P,T);=20
<BR>pause <BR>clc <BR>% =B6=D4 BP =
=CD=F8=C2=E7=BD=F8=D0=D0=B7=C2=D5=E6 <BR>A =3D sim(net,P);=20
<BR>% =BC=C6=CB=E3=B7=C2=D5=E6=CE=F3=B2=EE <BR>E =
=3D T - A; <BR>MSE=3Dmse(E) <BR>pause=20
<BR>clc <BR>% =
=BB=E6=D6=C6=C6=A5=C5=E4=BD=E1=B9=FB=C7=FA=CF=DF <BR>close all;=20
<BR>plot(P,A,P,T,'+',P,sin(2*pi*P),':'); <BR>pause;=20
=
<BR>clc =20
<BR>echo off<BR></P>
=
<P>=CD=A8=B9=FD=B2=C9=D3=C3=C1=BD=D6=D6=B2=BB=CD=AC=B5=C4=D1=B5=C1=B7=CB=E3=
=B7=A8=A3=AC=CE=D2=C3=C7=BF=C9=D2=D4=B5=C3=B5=BD=C8=E7=CD=BC =
1=BA=CD=CD=BC=20
=
2=CB=F9=CA=BE=B5=C4=C1=BD=D6=D6=C4=E2=BA=CF=BD=E1=B9=FB=A1=A3=CD=BC=D6=D0=
=B5=C4=CA=B5=CF=DF=B1=ED=CA=BE=C4=E2=BA=CF=C7=FA=CF=DF=A3=AC=D0=E9=CF=DF=B4=
=FA=B1=ED=B2=BB=BA=AC=B0=D7=D4=EB=C9=F9=B5=C4=D5=FD=CF=D2=C7=FA=CF=DF=A3=AC=
=A1=B0=A3=AB=A1=B1=B5=E3=CE=AA=BA=AC=D3=D0=B0=D7=D4=EB=C9=F9=B5=C4=D5=FD=CF=
=D2=D1=F9=B1=BE=CA=FD=BE=DD=B5=E3=A1=A3=CF=D4=C8=BB=A3=AC=BE=AD=20
trainlm =
=BA=AF=CA=FD=D1=B5=C1=B7=BA=F3=B5=C4=C9=F1=BE=AD=CD=F8=C2=E7=B6=D4=D1=F9=B1=
=BE=CA=FD=BE=DD=B5=E3=CA=B5=CF=D6=C1=CB=A1=B0=B9=FD=B6=C8=C6=A5=C5=E4=A1=B1=
=A3=AC=B6=F8=BE=AD trainbr=20
=
=BA=AF=CA=FD=D1=B5=C1=B7=B5=C4=C9=F1=BE=AD=CD=F8=C2=E7=B6=D4=D4=EB=C9=F9=B2=
=BB=C3=F4=B8=D0=A3=AC=BE=DF=D3=D0=BD=CF=BA=C3=B5=C4=CD=C6=B9=E3=C4=DC=C1=A6=
=A1=A3<BR><IMG alt=3D""=20
=
src=3D"http://homepage.scau.edu.cn/club/lixue/01c4/UploadFiles/2004862354=
22921.gif"=20
=
onload=3D"javascript:if(this.width>740)this.width=3D740"=20
=
border=3Dundefined><BR>=D6=B5=B5=C3=D6=B8=B3=F6=B5=C4=CA=C7=A3=AC=D4=DA=C0=
=FB=D3=C3 trainbr =BA=AF=CA=FD=D1=B5=C1=B7 BP=20
=
=CD=F8=C2=E7=CA=B1=A3=AC=C8=F4=D1=B5=C1=B7=BD=E1=B9=FB=CA=D5=C1=B2=A3=AC=CD=
=A8=B3=A3=BB=E1=B8=F8=B3=F6=CC=E1=CA=BE=D0=C5=CF=A2=A1=B0Maximum =
MU =20
=
reached=A1=B1=A1=A3=B4=CB=CD=E2=A3=AC=D3=C3=BB=A7=BB=B9=BF=C9=D2=D4=B8=F9=
=BE=DD SSE =BA=CD SSW =
=B5=C4=B4=F3=D0=A1=B1=E4=BB=AF=C7=E9=BF=F6=C0=B4=C5=D0=B6=CF=D1=B5=C1=B7=CA=
=C7=B7=F1=CA=D5=C1=B2=A3=BA=B5=B1 SSE =BA=CD SSW=20
=
=B5=C4=D6=B5=D4=DA=BE=AD=B9=FD=C8=F4=B8=C9=B2=BD=B5=FC=B4=FA=BA=F3=B4=A6=D3=
=DA=BA=E3=D6=B5=CA=B1=A3=AC=D4=F2=CD=A8=B3=A3=CB=B5=C3=F7=CD=F8=C2=E7=D1=B5=
=C1=B7=CA=D5=C1=B2=A3=AC=B4=CB=CA=B1=BF=C9=D2=D4=CD=A3=D6=B9=D1=B5=C1=B7=A1=
=A3=B9=DB=B2=ECtrainbr =BA=AF=CA=FD=D1=B5=C1=B7 BP=20
=
=CD=F8=C2=E7=B5=C4=CE=F3=B2=EE=B1=E4=BB=AF=C7=FA=CF=DF,=BF=C9=BC=FB=A3=AC=
=B5=B1=D1=B5=C1=B7=B5=FC=B4=FA=D6=C1 320 =
=B2=BD=CA=B1=A3=AC=CD=F8=C2=E7=D1=B5=C1=B7=CA=D5=C1=B2=A3=AC=B4=CB=CA=B1 =
SSE =BA=CD SSW=20
=
=BE=F9=CE=AA=BA=E3=D6=B5=A3=AC=B5=B1=C7=B0=D3=D0=D0=A7=CD=F8=C2=E7=B5=C4=B2=
=CE=CA=FD=A3=A8=D3=D0=D0=A7=C8=A8=D6=B5=BA=CD=E3=D0=D6=B5=A3=A9=B8=F6=CA=FD=
=CE=AA 11.7973=A1=A3 </P>
<P>=C0=FD3 =
=B2=C9=D3=C3=A1=B0=CC=E1=C7=B0=CD=A3=D6=B9=A1=B1=B7=BD=B7=A8=CC=E1=B8=DF =
BP =
=CD=F8=C2=E7=B5=C4=CD=C6=B9=E3=C4=DC=C1=A6=A1=A3=B6=D4=D3=DA=BA=CD=C0=FD =
2=CF=E0=CD=AC=B5=C4=CE=CA=CC=E2=A3=AC=D4=DA=B1=BE=C0=FD=D6=D0=CE=D2=C3=C7=
=BD=AB=B2=C9=D3=C3=D1=B5=C1=B7=BA=AF=CA=FD=20
traingdx =
=BA=CD=A1=B0=CC=E1=C7=B0=CD=A3=D6=B9=A1=B1=CF=E0=BD=E1=BA=CF=B5=C4=B7=BD=B7=
=A8=C0=B4=D1=B5=C1=B7 BP =CD=F8=C2=E7=A3=AC=D2=D4=CC=E1=B8=DF BP =
=CD=F8=C2=E7=B5=C4=CD=C6=B9=E3=C4=DC=C1=A6=A1=A3 </P>
=
<P>=BD=E2=A3=BA=D4=DA=C0=FB=D3=C3=A1=B0=CC=E1=C7=B0=CD=A3=D6=B9=A1=B1=B7=BD=
=B7=A8=CA=B1=A3=AC=CA=D7=CF=C8=D3=A6=B7=D6=B1=F0=B6=A8=D2=E5=D1=B5=C1=B7=D1=
=F9=B1=BE=A1=A2=D1=E9=D6=A4=D1=F9=B1=BE=BB=F2=B2=E2=CA=D4=D1=F9=B1=BE=A3=AC=
=C6=E4=D6=D0=A3=AC=D1=E9=D6=A4=D1=F9=B1=BE=CA=C7=B1=D8=B2=BB=BF=C9=C9=D9=B5=
=C4=A1=A3=D4=DA=B1=BE=C0=FD=D6=D0=A3=AC=CE=D2=C3=C7=D6=BB=B6=A8=D2=E5=B2=A2=
=CA=B9=D3=C3=D1=E9=D6=A4=D1=F9=B1=BE=A3=AC=BC=B4=D3=D0=20
=
<BR>=D1=E9=D6=A4=D1=F9=B1=BE=CA=E4=C8=EB=CA=B8=C1=BF=A3=BAval.P =3D =
[-0.975:.05:0.975] =
<BR>=D1=E9=D6=A4=D1=F9=B1=BE=C4=BF=B1=EA=CA=B8=C1=BF=A3=BAval.T =3D=20
sin(2*pi*val.P)+0.1*randn(size(val.P))=20
=
<BR>=D6=B5=B5=C3=D7=A2=D2=E2=B5=C4=CA=C7=A3=AC=BE=A1=B9=DC=A1=B0=CC=E1=C7=
=B0=CD=A3=D6=B9=A1=B1=B7=BD=B7=A8=BF=C9=D2=D4=BA=CD=C8=CE=BA=CE=D2=BB=D6=D6=
BP=20
=
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