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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:
9 q# K+ b) L% W约束条件是在上面的Table里面直接输入最大最小值吧。9 U; P4 X% p7 B: Q& c" R; B
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).+ _! @9 B, Q. N/ z: B2 ^  b

! k  X; U5 x3 |5 R* rMaximum 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).& S) R* d& r# O0 K1 i
下面的Equation栏里面应该写入目标函数吧。' u" r4 U, D* L% r9 _4 e
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
: s( Y" V- M) Z8 \不等式都是在条件里面如5 B+ Y' l4 n' [+ G7 Z/ _$ o& T
if (DelTankSize >= 6000 && DeliveryTimes < 60)6 W, t6 U- j3 M" W" H: S
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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