当LP模型无限的时候,LINGO求出的函数值是什么意义?如下
max=Z1;
Z1=0.1x2+0.2x3+0.3x4+0.8x5;
x1+2x2+x4>200;
2x3+2x4+x5>200;
3x1+x2+2x3+3x5>200;
end
Model is unbounded
Variable Value Reduced Cost
Z1 170.0000 0.000000
X2 100.0000 0.000000
X3 0.000000 1.400000
X4 0.000000 1.350000
X5 200.0000 0.000000
X1 0.000000 0.5000000E-01
Row Slack or Surplus Dual Price
1 -0.1000000E+31 1.000000
2 0.000000 1.000000
3 0.000000 0.5000000E-01
4 0.000000 0.8000000
5 500.0000 0.000000