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СÓã118: ½ð±Ò+10, ¡ïÓаïÖú, ·Ç³£¸Ðл°ïÖú£¬µ«¶Ô²»Æð£¬Ö»ÄܸøÄãÕâЩ½ð±Ò£¬Çë¿´Çå³þÌõ¼þ£¬Ã»ÓÐN4£¬¶øÇÒ½á¹ûÀï²»ÄÜÓÐN3ºÍN5 2012-12-04 16:09:28
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clear
syms n0 n1 n2 n3 n4 n5 t1 w22 w rp
syms w50 w30
syms w11
n5=w22*n2^2/(1+w50*n0);
n3=(w22*n2^2+w11*n1^2)/(1+w30*n0);
eq1=sym('-n1/t1-w22*n1^2-w22*n2^2+w50*n5*n0+w30*n3*n0+rp*n0=0');
eq2=sym('n1+n2+n3+n4+n5=n0')
[nn1 nn2]=solve(eq1,eq2,n1,n2)
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СÓã118: ½ð±Ò+5, ¡ïÓаïÖú, ллÌáÐÑ 2012-12-04 16:11:11
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Solve[{f1==0,f2==0},{n1,n2}]
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СÓã118

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3Â¥: Originally posted by archdevil at 2012-12-04 00:16:42
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Solve
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4Â¥2012-12-04 08:40:13
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michaeldel

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soliton923: ½ð±Ò+1, лл²ÎÓëÌÖÂÛ 2012-12-04 21:24:40
ÒýÓûØÌû:
5Â¥: Originally posted by michaeldel at 2012-12-04 11:05:30
lss˵µÄ²»ÊÇmatlab
matlabµÄ³ÌÐòÈçÏ£¨Èç¹û³ýÁËN1 N2ÆäËûÁ¿¶¼ÊÇÒÑÖª£©£º
clear
syms n0 n1 n2 n3 n4 n5 t1 w22 w rp
syms w50 w30
syms w11
n5=w22*n2^2/(1+w50*n0);
n3=(w22*n2^2+w11*n1^2)/(1+w30*n0);
e ...

clear
syms n0 n1 n2 n3 n5 t1 w22 w rp;
syms w50 w30;
syms w11;
eq1=sym('-n1/t1-w22*n1^2-w22*n2^2+w50*n5*n0+w30*n3*n0+rp*n0=0');
eq2=sym('n1+n2+n3+n5=n0');
[nn1 nn2]=solve(eq1,eq2,n1,n2);
nn11=subs(nn1,'n3','(w22*n2^2+w11*n1^2)/(1+w30*n0)');
N1=subs(nn11,'n5','w22*n2^2/(1+w50*n0)')
nn22=subs(nn2,'n3','(w22*n2^2+w11*n1^2)/(1+w30*n0)');
N2=subs(nn22,'n5','w22*n2^2/(1+w50*n0)')
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6Â¥2012-12-04 20:31:34
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