Lingo建模语言与实例4

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目标与约束段
集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
1 D. H$ u) \& M5 d- ~（计算段 (CALC ENDCALC)）
MODEL:
# G3 {0 |3 b4 W6 [. y. c1 ~7 RTitle Location Problem;
sets:
    demand/1..6/:a,b,d;
; {9 \! G3 t7 U1 p5 G+ ^2 U    supply/1..2/:x,y,e;
+ U5 R$ \7 ~; W  W! T    link(demand,supply):c;
endsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
* O( h! ]; Z" ?- v' cenddata
( ^+ h: y# b, uinit:
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));
% m' ]. @/ `0 w# W0 a7 O7 o@for(demand(i)sum(supply(j):c(i,j))=d(i););
! I, B0 f( ~' r/ A0 ~; T, X@for(supply(i)sum(demand(j):c(j,i))<=e(i););
; K9 K  l5 S9 F8 t0 Y6 uEND
& T5 T* i5 r# Y6 @& y9 U

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