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[交流] 关于优化工具中约束条件的表达

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发表于 2009-5-21 16:44:46 | 显示全部楼层 |阅读模式
EXTEND中的优化工具中的约束条件如果是含有>=或者<=的数学式子,该如何表示?
发表于 2009-5-21 20:36:24 | 显示全部楼层
个人想法:* L( Z# X* q, X0 k4 C
约束条件是在上面的Table里面直接输入最大最小值吧。% z+ x  B% O  N# ]0 L
Minimum Limit: Table Column 5: The minimum value that this variable can be set to by the Optimizer block. If it is entered without a decimal point, it can only assume integer values. Do not enter limits for variables that are used as results from the model (i.e. Exited from an Exit block).7 }  m9 T+ G2 g& K% j9 K+ @

: b; g# d' J7 @! o( tMaximum Limit: Table Column 6: The maximum value that this variable can be set to by the Optimizer block. If it is entered without a decimal point, it can only assume integer values. Do not enter limits for variables that are used as results from the model (i.e. Exited from an Exit block).
  P5 L3 R% W9 H; }- |3 d6 h下面的Equation栏里面应该写入目标函数吧。4 u6 _3 r; f- E$ P  a2 T& S
MaxProfit (MiniCost)= Var0 + Var1 + Var2;
发表于 2009-5-22 16:37:01 | 显示全部楼层
哦,搞错了,抱歉 " j+ Q: l6 x$ ^$ Z( |$ N: A) I; M
不等式都是在条件里面如
& Q# _5 P( z/ g( k, uif (DelTankSize >= 6000 && DeliveryTimes < 60)
- u3 M) J+ v: `Reject = TRUE;  //  你的意思是这个地方是不等式的情况吗?手册里好像没有这样的说明。
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