我所建的模型为：min=0.7854*(3.333*x3^2+14.9334*x3-43.0934)-1.508*x1*(x6^2+x7^2)+7.4777*(x6^3+x7^3)+0.7854*(x4*x6^2+x5*x7^2);
27*x1^(-1)*x2^(-2)*x3^2<=1;
397.5*x1^(-1)*x2^(-2)*x3^(-2)<=1;
1.93*x4^3*x2^(-1)*x3^(-1)*x6^(-4)<=1;
1.93*x5^3*x2^(-1)*x3^(-1)*x7^(-4)<=1;
(110*x5^3)^(-1)*((745*x2^(-1)*x3^(-1)*x4)^2+16.9*10^6)^(0.5)<=1;
(85*x7^3)^(-1)*((745*x2^(-1)*x3^(-1)*x5)^2+157.5*10^6)^(0.5)<=1;
x2*x3<=40;
(1.5*x6+1.9)*x4^(-1)<=1;
x1*x2^(-1)<=12;
5<=x1*x2^(-1);
(1.1*x7+1.7)*x5^(-1)<=1;
2.6<=x1;x1<=3.6;0.7<=x2;x2<=0.8;17<=x3;x3<=28;7.3<=x4;x4<=8.3;7.3<=x5;x5<=8.3;
2.9<=x6;x6<=3.9;5<=x7;x7<=5.5;
我自己用lingo9.0破解版得不到最优解，运行结果出现：Unexpected Jacobian overflow.Contact
lindo systems for patch availability(1).在网上，有人得到最优解，并且用的是9.0版本。希望大家能帮忙！诚盼速回！
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