lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
* X" Y, x1 ?3 P! Y8 o" K（计算段 (CALC ENDCALC)）
MODEL:
, J+ s2 Z3 c1 FTitle Location Problem;
2 b2 G- G" x8 G4 x. Qsets:
4 Z; o) }& R! H8 i2 ~    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
( n' q+ V9 w+ d    link(demand,supply):c;
endsets
7 z' V9 O( c; ]8 ~' Rdata:
2 x1 B2 ?2 s2 R3 da=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;
enddata
$ ~  N: O! E/ t5 ?% zinit:
; s) x4 |6 ~- Ox,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););
( D/ }$ y1 v+ T9 j, {' Q@for(supply(i)sum(demand(j):c(j,i))<=e(i););
; r- S  u) z' U% I- gEND

  r. V4 U/ ?3 [8 }0 b