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dx/dt=x*(k*sin(w*t)-3.5*x+0.5*x(t-0.1)+0.5*x(t-0.2)+0.05*y(t-0.3)+0.05*y(t-0.4))
dy/dt=y*(l*sin(u*t)-4*y+0.6*y(t-0.2)+0.6*y(t-0.1)+0.05*x(t-0.4)+0.05*x(t-0.2))
t          x          y
1999      0.4839    1.5139
2000      4.674     4.1868
2001      1.0501    2.555
2002      2.3323    0.5724
2003      3.1562    3.5341
2004      17.2848   12.5552
2005      51.8524   6.4077
2006      79.8377   15.2467
2007      146.9956  25.2808
2008      314.96778 59.1078
2009      390.5913  96.31
2010      509.5823  91.86
2011      694.2673  83.17
2012      719.47706 76.4728

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1Â¥: Originally posted by ¹âÓëàÅ at 2015-12-25 13:48:12
dx/dt=x*(k*sin(w*t)-3.5*x+0.5*x(t-0.1)+0.5*x(t-0.2)+0.05*y(t-0.3)+0.05*y(t-0.4))
dy/dt=y*(l*sin(u*t)-4*y+0.6*y(t-0.2)+0.6*y(t-0.1)+0.05*x(t-0.4)+0.05*x(t-0.2))
t          x          y
1999      0.483 ...

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2Â¥2015-12-25 13:52:51
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3Â¥2015-12-26 10:54:07
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