数学建模社区-数学中国
标题:
lingo建模语言与实例4
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作者:
longde
时间:
2015-7-22 15:24
标题:
lingo建模语言与实例4
目标与约束段
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集合段（SETS ENDSETS）
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数据段（DATA ENDDATA）
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初始段（INIT ENDINIT）
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（计算段 (CALC ENDCALC)）
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MODEL:
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Title Location Problem;
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sets:
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demand/1..6/:a,b,d;
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supply/1..2/:x,y,e;
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link(demand,supply):c;
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endsets
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data:
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a=1.25,8.75,0.5,5.75,3,7.25;
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b=1.25,0.75,4.75,5,6.5,7.75;
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d=3,5,4,7,6,11; e=20,20;
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enddata
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init:
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x,y=5,1,2,7;
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endinit
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min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
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@for(demand(i)
sum(supply(j):c(i,j))=d(i););
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@for(supply(i)
sum(demand(j):c(j,i))<=e(i););
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END
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sum(supply(j):c(i,j))=d(i);); sum(demand(j):c(j,i))<=e(i););& X$ N4 u; x+ D0 z$ N