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ÕâÊÇÎÒµÄMÎļþ£¬»Í¼×ÜÊÇ˵ά¶È²»Ïàͬ£¬ÇëÇóÖ¸µã function test9 global v global r [v,r]=meshgrid(1:1:20); sol=dde23(@ddex1de,[v,r],[1,1,1],[100,1000]); mesh(v,r,sol.y(1)); function dydt = ddex1de(t,y,Z) % Differential equations function for DDEX1. ylag1 = Z(:,1); ylag2 = Z(:,2); s=160;d=0.01;k=0.001;d2=0.03;gama=0.02;v=0.03; d3=0.1; dydt =[s-d*y(1)-k*y(1).*y(2); k*0.02*ylag1(1).*ylag1(2)-d2*y(2)-gama*y(2).*y(3); v*ylag2(2).*ylag2(3)./(ylag2(3)+1)-d3*y(3)]; |
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meatball1982
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2Â¥2013-11-11 12:36:33
wanglaiwang
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3Â¥2013-11-12 12:21:49














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