📄 bp神经网络的设计实例.mht
字号:
=CD=F8=C2=E7=D1=B5=C1=B7=BA=AF=CA=FD=D2=BB=C6=F0=CA=B9=D3=C3=A3=AC=B5=AB=CA=
=C7=B2=BB=CA=CA=BA=CF=CD=AC=D1=B5=C1=B7=CB=D9=B6=C8=B9=FD=BF=EC=B5=C4=CB=E3=
=B7=A8=C1=AA=BA=CF=CA=B9=D3=C3=A3=AC=B1=C8=C8=E7 trainlm=20
=
=BA=AF=CA=FD=A3=AC=CB=F9=D2=D4=B1=BE=C0=FD=D6=D0=CE=D2=C3=C7=B2=C9=D3=C3=D1=
=B5=C1=B7=CB=D9=B6=C8=CF=E0=B6=D4=BD=CF=C2=FD=B5=C4=B1=E4=D1=A7=CF=B0=CB=D9=
=C2=CA=CB=E3=B7=A8 traingdx =
=BA=AF=CA=FD=D7=F7=CE=AA=D1=B5=C1=B7=BA=AF=CA=FD=A1=A3<BR>=B1=BE=C0=FD=B5=
=C4 MATLAB=20
=B3=CC=D0=F2=C8=E7=CF=C2=A3=BA<BR>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
<BR>T =3D sin(2*pi*P)+0.1*randn(size(P)); <BR>% =
=BB=E6=D6=C6=D1=B5=C1=B7=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
% =
=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>% =B6=A8=D2=E5=D1=E9=D6=A4=D1=F9=B1=BE =
<BR>val.P =3D=20
=
[-0.975:0.05:0.975]; =20
% =
=D1=E9=D6=A4=D1=F9=B1=BE=B5=C4=CA=E4=C8=EB=CA=B8=C1=BF <BR>val.T =3D=20
=
sin(2*pi*val.P)+0.1*randn(size(val.P)); &nbs=
p; =20
% =
=D1=E9=D6=A4=D1=F9=B1=BE=B5=C4=C4=BF=B1=EA=CA=B8=C1=BF <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),[5,1],{'tansig','purelin'},'traingdx');=20
<BR>pause <BR>clc <BR>% =
=C9=E8=D6=C3=D1=B5=C1=B7=B2=CE=CA=FD <BR>net.trainParam.epochs=20
=3D 500; <BR>net =3D init(net); <BR>pause <BR>clc =
<BR>% =D1=B5=C1=B7=20
BP =CD=F8=C2=E7 =
<BR>[net,tr]=3Dtrain(net,P,T,[],[],val); <BR>pause <BR>clc=20
<BR>% =B6=D4 BP =
=CD=F8=C2=E7=BD=F8=D0=D0=B7=C2=D5=E6 <BR>A =3D sim(net,P); <BR>% =
=BC=C6=CB=E3=B7=C2=D5=E6=CE=F3=B2=EE=20
<BR>E =3D T - A; <BR>MSE=3Dmse(E) <BR>pause <BR>clc =
<BR>% =20
=
=BB=E6=D6=C6=B7=C2=D5=E6=C4=E2=BA=CF=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 </P>
=
<P>=CF=C2=C3=E6=B8=F8=B3=F6=C1=CB=CD=F8=C2=E7=B5=C4=C4=B3=B4=CE=D1=B5=C1=B7=
=BD=E1=B9=FB=A3=AC=BF=C9=BC=FB=A3=AC=B5=B1=D1=B5=C1=B7=D6=C1=B5=DA 136 =
=B2=BD=CA=B1=A3=AC=D1=B5=C1=B7=CC=E1=C7=B0=CD=A3=D6=B9=A3=AC=B4=CB=CA=B1=B5=
=C4=CD=F8=C2=E7=CE=F3=B2=EE=CE=AA=20
=
0.0102565=A1=A3=B8=F8=B3=F6=C1=CB=D1=B5=C1=B7=BA=F3=B5=C4=B7=C2=D5=E6=CA=FD=
=BE=DD=C4=E2=BA=CF=C7=FA=CF=DF=A3=AC=D0=A7=B9=FB=CA=C7=CF=E0=B5=B1=C2=FA=D2=
=E2=B5=C4=A1=A3=20
<BR>[net,tr]=3Dtrain(net,P,T,[],[],val); <BR>TRAINGDX, =
Epoch=20
0/500, MSE 0.504647/0, Gradient =
2.1201/1e-006<BR>TRAINGDX,=20
Epoch 25/500, MSE 0.163593/0, Gradient=20
0.384793/1e-006<BR>TRAINGDX, Epoch 50/500, MSE =
0.130259/0,=20
Gradient 0.158209/1e-006<BR>TRAINGDX, Epoch 75/500, =
MSE=20
0.086869/0, Gradient 0.0883479/1e-006<BR>TRAINGDX, =
Epoch=20
100/500, MSE 0.0492511/0, Gradient=20
0.0387894/1e-006<BR>TRAINGDX, Epoch 125/500, MSE =
0.0110016/0,=20
Gradient 0.017242/1e-006<BR>TRAINGDX, Epoch 136/500, =
MSE=20
0.0102565/0, Gradient 0.01203/1e-006<BR>TRAINGDX, =
Validation=20
stop.<BR><IMG alt=3D""=20
=
src=3D"http://homepage.scau.edu.cn/club/lixue/01c4/UploadFiles/2004862354=
36543.gif"=20
=
onload=3D"javascript:if(this.width>740)this.width=3D740"=20
border=3Dundefined></P>
<P><BR><BR> </P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P align=3Dcenter><FONT=20
=
color=3Dred><B>[1]</B></FONT></P></TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD colSpan=3D2>
<TABLE=20
style=3D"BORDER-TOP: #6687ba 1px solid; BORDER-BOTTOM: =
#6687ba 1px solid"=20
height=3D50 cellSpacing=3D5 cellPadding=3D0 width=3D"100%" =
border=3D0>
<TBODY>
<TR>
<TD>
<LI>=C9=CF=D2=BB=C6=AA=CE=C4=D5=C2=A3=BA <A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=BE=B6=CF=F2=BB=F9=BA=AF=CA=FD=CD=F8=
=C2=E7=C9=E8=BC=C6 =D7=F7 =
=D5=DF=A3=BAcac =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2004-7-28 =
1:45:45 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA4406"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D16">=BE=B6=CF=F2=BB=F9=BA=AF=CA=FD=CD=F8=C2=E7=C9=E8=BC=C6</A>=20
<BR>
<LI>=CF=C2=D2=BB=C6=AA=CE=C4=D5=C2=A3=BA =
=C3=BB=D3=D0=C1=CB </LI></TD></TR></TBODY></TABLE></TD></TR>
<TR class=3Dtdbg_leftall align=3Dright>
<TD colSpan=3D2>=A1=BE<A=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Comment.asp?A=
rticleID=3D60"=20
target=3D_blank>=B7=A2=B1=ED=C6=C0=C2=DB</A>=A1=BF=A1=BE<A=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/SendMail.asp?ArticleI=
D=3D60"=20
target=3D_blank>=B8=E6=CB=DF=BA=C3=D3=D1</A>=A1=BF=A1=BE<A=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Print.asp?Art=
icleID=3D60">=B4=F2=D3=A1=B4=CB=CE=C4</A>=A1=BF=A1=BE<A=20
=
href=3D"javascript:window.close();">=B9=D8=B1=D5=B4=B0=BF=DA</A>=A1=BF</T=
D></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" =
align=3Dcenter border=3D0>
<TBODY>
<TR>
<TD vAlign=3Dtop align=3Dmiddle height=3D13>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" =
align=3Dcenter=20
border=3D0>
<TBODY>
<TR>
<TD class=3Dtdbg_left2=20
height=3D13></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"99%" =
align=3Dcenter border=3D0>
<TBODY>
<TR>
<TD vAlign=3Dtop width=3D250>
<TABLE class=3Dborder height=3D"100%" cellSpacing=3D0 =
cellPadding=3D2=20
width=3D"100%" border=3D0>
<TBODY>
<TR class=3Dtitle>
<TD>
<DIV align=3Dcenter>
<TABLE class=3Dtdbg_rightall cellSpacing=3D0 =
cellPadding=3D0=20
width=3D"100%" border=3D0>
<TBODY>
<TR>
<TD class=3Dtitle_maintxt>
<DIV=20
=
align=3Dcenter><STRONG> =D7=EE=D0=C25=C6=AA=C8=C8=B5=E3=CE=C4=D5=C2<=
/STRONG></DIV></TD></TR></TBODY></TABLE></DIV></TD></TR>
<TR>
<TD vAlign=3Dtop height=3D120>
<TABLE height=3D"100%" cellSpacing=3D5 cellPadding=3D0 =
width=3D"100%"=20
border=3D0>
<TBODY>
<TR>
<TD vAlign=3Dtop>
<LI><A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=BC=D9=C8=E7=C8=C3=C4=E3=CE=C7=CF=C2=
=C8=A5[=D2=F4=C0=D6] =D7=F7 =
=D5=DF=A3=BA=D8=FD=C3=FB =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2005-2-16=
23:22:05 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA6551"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D92"=20
=
target=3D_blank>=BC=D9=C8=E7=C8=C3=C4=E3=CE=C7=CF=C2=C8=A5[=D2=F4=C0=D6]<=
/A>[<FONT=20
color=3Dred>6551</FONT>]<BR>
<LI><A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=CA=FD=C4=A3=BE=BA=C8=FC=D6=D0=BD=A8=
=BA=C3=CA=FD=D1=A7=C4=A3=D0=CD=D6=AE=D1=D0=BE=BF =D7=F7 =
=D5=DF=A3=BA=D8=FD=C3=FB =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2004-8-25=
0:30:28 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA12201"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D91"=20
=
target=3D_blank>=CA=FD=C4=A3=BE=BA=C8=FC=D6=D0=BD=A8=BA=C3=CA=FD=D1=A7=C4=
=A3=D0=CD=D6=AE=A1=AD</A>[<FONT=20
color=3Dred>12201</FONT>]<BR>
<LI><A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=
=D0=C2=CA=D6=BD=CC=B3=CC(1)--=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=CA=C7=CA=
=B2=C3=B4? =D7=F7 =
=D5=DF=A3=BA=D8=FD=C3=FB =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2004-8-25=
0:29:08 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA9920"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D90"=20
=
target=3D_blank>=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=D0=C2=CA=D6=BD=CC=B3=
=CC(1)-=A1=AD</A>[<FONT=20
color=3Dred>9920</FONT>]<BR>
<LI><A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=
=D0=C2=CA=D6=BD=CC=B3=CC(2)--=BD=A8=C4=A3=D6=D0=B5=C4=B7=D6=B9=A4=D3=EB=BA=
=CF=D7=F7 =D7=F7 =
=D5=DF=A3=BA=D8=FD=C3=FB =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2004-8-25=
0:28:29 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA8295"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D89"=20
=
target=3D_blank>=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=D0=C2=CA=D6=BD=CC=B3=
=CC(2)-=A1=AD</A>[<FONT=20
color=3Dred>8295</FONT>]<BR>
<LI><A=20
=
title=3D"=CE=C4=D5=C2=B1=EA=CC=E2=A3=BA=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=
=D0=C2=CA=D6=BD=CC=B3=CC(=CD=E2=B4=AB)--=C0=FB=D3=C3=BA=C3Word =D7=
=F7 =
=D5=DF=A3=BA=D8=FD=C3=FB =B8=FC=D0=C2=CA=B1=BC=E4=A3=BA2004-8-25=
0:26:51 =B5=E3=BB=F7=B4=CE=CA=FD=A3=BA7929"=20
=
href=3D"http://homepage.scau.edu.cn/club/lixue/01c4/Article_Show.asp?Arti=
cleID=3D88"=20
=
target=3D_blank>=CA=FD=D1=A7=BD=A8=C4=A3=BE=BA=C8=FC=D0=C2=CA=D6=BD=CC=B3=
=CC(=CD=E2=B4=AB=A1=AD</A>[<FONT=20
=
color=3Dred>7929</FONT>]<BR></LI></TD></TR></TBODY></TABLE></TD></TR></TB=
ODY></TABLE></TD>
<TD vAlign=3Dtop width=3D5> </TD>
<TD vAlign=3Dtop width=3D250>
<TABLE class=3Dborder height=3D"100%" cellSpacing=3D0 =
cellPadding=3D2=20
width=3D"100%" border=3D0>
<TBODY>
<TR class=3Dtitle>
<TD>
<DIV align=3Dcenter>
<TABLE class=3Dtdbg_rightall cellSpacing=3D0 =
cellPadding=3D0=20
width=3D"100%" border=3D0>
<TBODY>
<TR>
<TD class=3Dtitle_maintxt>
<DIV=20
=
align=3Dcenter><STRONG> =D7=EE=D0=C25=C6=AA=CD=C6=BC=F6=CE=C4=D5=C2<=
/STRONG></DIV></TD></TR></TBODY></TABLE></DIV></TD></TR>
<TR>
<TD vAlign=3Dtop height=3D120>
<TABLE height=3D"100%" cellSpacing=3D5 cellPadding=3D0 =
width=3D"100%"=20
border=3D0>
<TBODY>
<TR>
<TD vAlign=3Dtop>
<LI><A=20
=
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -