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发表于 2005-9-5 07:25:49
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< >此外,若加入01变量,可只修改对b(i)的约束条件即可。</P>
< >程序如下:</P>
< >model:<BR>sets:<BR>!增加con为b(i)的取值范围;<BR>ai/1..10/:a,con;<BR>bi/1..5/:b;<BR>!增加0-1变量;<BR>flag(bi,ai):f;<BR>endsets<BR><a href="mailtmin=@sum(bi(i) sum(ai(j) if(j" target="_blank" >min=@sum(bi(i) sum(ai(j):@if(j</A> #eq# b(i),a(j),0)));<BR>@for(ai(i):a(i)=i);<BR><a href="mailt!@for(bi(i):@bnd(1,b(i),10" target="_blank" >!@for(bi(i):@bnd(1,b(i),10</A>));<BR><a href="mailt!@for(bi(i):@gin(b(i" target="_blank" >!@for(bi(i):@gin(b(i</A>)));<BR>!用下面4句取代上面两句对b(i)的约束即可;<BR>@for(ai(i):con(i)=i);<BR>@for(bi(i):@sum(ai(j):f(i,j))=1);<BR>@for(bi(i):b(i)=@sum(ai(j):con(j)*f(i,j)));<BR>@for(flag:@bin(f));<BR>end</P>
<P>运行结果是5。虽然正确,但是b(1)居然取2。</P>
<P>晕~</P> |
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