Lingo建模语言与实例4

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目标与约束段
" T2 \/ t7 V+ U集合段（SETS    ENDSETS）
* v3 N1 m! w1 s, p数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
. {6 n/ \, `9 A    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
data:
/ \- W2 |2 n& ~# v$ g$ I# ha=1.25,8.75,0.5,5.75,3,7.25;
! J/ h4 }1 i9 Q; Rb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
9 T' ~' l" `3 w8 t& {: j* Nenddata
init:
x,y=5,1,2,7;
endinit
min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
2 ^+ G( M6 e; L& L: H8 R$ J

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好