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function dx=fun5(t,x,a)     dx(1)=0.000088+((0.051253+1.74*x(1)+2981*x(1)^2)/(1+157*x(1)+8.8*x(1)^2+12.67*x(3)+0.05*x(3)^2+48.5*x(1)*x(3)))-0.198*x(1);
dx(2)=((0.014+259*x(1)+172*x(1)^2)/(1+157*x(1)+49*x(1)^2+25.133867*x(3)+0.0134*x(3)^2+1.17*x(1)*x(3)))-0.075*x(2);
dx(3)=0.324+((264*x(1)+763*x(1)^2+1.89*x(2)+358*x(2)^2)/(1+x(1)+0.055*x(1)^2+0.224*x(2)+0.3*x(2)^2+8.4*x(1)*x(2)))+0.133*x(4)+0.043*x(5)-1.538*x(3);
dx(4)=a*x(3)-0.1332*x(4);
dx(5)=0.0913*x(3)-0.04365*x(5);   
dx=[dx(1);dx(2);dx(3);dx(4);dx(5)];¼´È總¼þËùʾ£¬ÆäÖÐa µÄ±ä»¯·¶Î§ 0.99~1.077 ʱҪ»­³öx(4)ºÍa Ö®¼äµÄ·Ö²íͼ£¬³õʼֵ x0=[0.01;0.05;12.5;72;19]¡£
ÒÔÏÂÎҵijÌÐò£º a=0.99:0.001:1.075;
hold on
for j=1:length(a)   
    [t,x]=ode45('fun5',[0,8000],[0.01;0.05;12.5;72;19],[],a(j));
      plot(a(j),x(:,4))
    hold on
end
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xunyuqi

½ð³æ (ÕýʽдÊÖ)

ÎÒҲͬÇó´ËÎÊÌâ

¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
¾Ý˵ÓÐÆæµãµÄ»°ÐèÒªºöÂÔ£¬·ñÔòmatlab³ÌÐòÔËÐв»¹ýÈ¥£¬ÎÒÒ²Õý³îÈçºÎ»­ÄØ£¬Èç¹û½â¾öÁËÒ²Çë¸æÖªÎÒ£¬¶àл£¬Áí½«ÎÒµÄÎÊÌâÌùÉÏ
http://blog.sina.com.cn/s/blog_67454ac70100t3kh.html
2Â¥2011-04-17 00:32:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lzwhw2000

½ð³æ (³õÈëÎÄ̳)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
It's easy to get it!
3Â¥2013-02-02 23:07:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lzwhw2000

½ð³æ (³õÈëÎÄ̳)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
[t,x]=ode45('fun5',[0,8000],[0.01;0.05;12.5;72;19],[],a(j));
´íÁË
    [t,x]=ode45('fun5',[0,8000],[0.01;0.05;12.5;72;19],a(j));

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