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shenqiang111

½ð³æ (СÓÐÃûÆø)

[ÇóÖú] ¹òÇó°ïÖú£ºmatlab³£Î¢·Ö·½³Ì»­Í¼Çó½â

ÈçºÎÔËÓÃMatlab¶Ô³£Î¢·Ö·½³Ì£ºdx/dt=x*(1-x)*(-16*x^2+16*x-3)½øÐл­Í¼Ä£Ä⣬¸ù¾ÝÄ£ÐͼÙÉèÇó½â£¬µ±³õʼֵ0 function xprim=xprim4(x,t)
xprim= x*(1-x)*(-16*x^2+16*x-3);

[t,x]=ode45('xprim4',[0 1],0.25);
plot(t,x);
xlabel('t');
ylabel('x x(0)=0.2');


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ÐűËÄÏɽ

ľ³æ (ÖøÃûдÊÖ)

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shenqiang111(½ð±Ò+5): ¸Ðл¥Ö÷µÄÖ¸½Ì£¬²»ÖªÂ¥Ö÷ÄÜ·ñ¸øÓè¾ßÌåÖ¸µ¼ÄØ£¬±ÈÈçÄúËù˵µÄ»ý·ÖÐÎʽ£¬Ð»Ð»Â¥Ö÷¡£ 2011-09-26 00:09:13
spc08(½ð±Ò+1): ¸ÐлӦÖú 2011-09-26 08:33:29
ÉèÖÃÉÏÏÂÏÞ
CODE:
if x<0
   x=0;
else if x>1
       x=1
     end
end

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2Â¥2011-09-25 23:29:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

change0618

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

·½ÕÉ´óʦ

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
shenqiang111(½ð±Ò+5): лл¥Ö÷µÄÖ¸½Ì£¬¶Ô±¾È˺ÜÓаïÖú£¬²»Öª¸øÄã·¢µÄÏûÏ¢ÄúÊÇ·ñÊÕµ½²¢¸øÓèÒ»¶¨µÄ½âÊͰ¡£¡Ð»Ð»Äú£¡ 2011-09-26 00:10:07
spc08(½ð±Ò+1): ¸ÐлӦÖú 2011-09-26 08:33:36
CODE:
[t,x]=ode45('xprim4',[0 10],0.2);
plot(t,x);
xlabel('t');
ylabel('x x(0)=0.2');

function xprim=xprim4(t,x)
xprim= x*(1-x)*(-16*x^2+16*x-3);

3Â¥2011-09-25 23:35:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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