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v =


28.786359708932167 - 0.000000000000449i
-0.056673985902386 - 0.000000000229294i
-0.000315349578379 + 0.000000000229743i
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4Â¥: Originally posted by tgvictor99 at 2013-07-05 11:12:48
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dutudou: ½ð±Ò+5, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ÕæÐĸÐл°¡£¡£¡£¡ 2013-07-05 11:37:40
¶ÔÓÚÄã×òÌìµÄÄǸö·½³Ì£¬ÊǵäÐ͵ķÇÏßÐÔ·½³Ì£¬ÎÒÐÞ¸ÄÁ˳ÌÐò£¬ÓÃfsolveº¯ÊýÀ´½â£¬³ÌÐòÔÚÏÂÃæ¡£ÏÈн¨Ò»¸ömÎļþ£¬ÔÙ°ÑÒÔÏÂÈ«²¿³ÌÐòÖ±½Ó¸´ÖƽømÎļþÖУ¬ÔËÐм´¿É£¬²»ÒªÔÚÖ÷´°¿ÚÖÐÔËÐУ¬ÓÃmÎļþÀ´Ð´³ÌÐò£¬±ÈÖ±½ÓÔÚÖ÷´°¿ÚÖвÙ×÷·½±ã£¬Ò²ËãÊÇÒ»ÖÖºÃϰ¹ß°É¡£
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function solution_nonl
clear all;clc
global aa bb tt pp

%-------------¸ù¾Ý¼ÆËã½á¹û£¬Ð޸ĵü´ú³õÖµ------------------------------------
xx0=[1];  %µü´ú³õÖµ£¬Èç¹û¼ÆËã½á¹û²»·ûºÏʵ¼Ê£¬¿ÉÐ޸ģ¬Ò»°ãÓÉpV=nRT¸ø³ö³õʼµÄV£¬ÕâÀïÎÒÖ±½ÓÈ¡1ÁË
t =[350.1500 348.9500 347.1500 345.4500 342.3500 340.7500 338.9500];
p =[101.3300 101.3300 101.3300 101.3300 101.3300 101.3300 101.3300 101.3300];
a =[0.9098 0.9365 0.9763 1.0223 1.0549 1.0968 1.1340 1.1773];
b =[0.0573 0.0565 0.0551 0.0535 0.0523 0.0507 0.0491 0.0470];
v=[];
for n=1:7
aa=a(n);
bb=b(n);
tt=t(n);
pp=p(n);
x(n)=fsolve(@nonlin,xx0);
end
disp(x)

function f= nonlin(x)
global aa bb tt pp
f=8.314*tt/(x-bb)-aa/(x*(x+bb))-pp;

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28.7864   28.6871   28.5380   28.3969   28.1413   28.0084   27.8591
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28.786359708135375  28.687090969223252  28.537987804689500  28.396887298198173  28.141321545916146  28.008427048788107  27.859124010004489
MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
3Â¥2013-07-05 09:25:44
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tgvictor99

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