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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:
- x1 H# ?/ L4 a3 [6 m4 }9 ^约束条件是在上面的Table里面直接输入最大最小值吧。3 @5 a6 m* `+ C: p& f
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).
# V! Y* ~4 G  _9 T0 d+ j/ k+ e" G9 \3 X& C
Maximum 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)." P' Q8 _+ ~' h7 {; b
下面的Equation栏里面应该写入目标函数吧。/ j& r" Q# g- m: H* g$ U' {+ I6 m& M
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 # G- @/ a0 m$ h7 [* r: U% n: m* m( f
不等式都是在条件里面如. y! F& `5 C/ R9 E% W" w- E8 f
if (DelTankSize >= 6000 && DeliveryTimes < 60)
) V5 \0 A. b' M* d4 `$ z2 i0 VReject = 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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