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）
8 n5 F1 U7 `: r' ^初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
' [( x: I1 o! u2 p, nMODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
    link(demand,supply):c;
: C3 F5 c; h+ j! G# g# vendsets
/ q) B( B* s# g/ Ydata:
a=1.25,8.75,0.5,5.75,3,7.25;
" F8 G; i2 R% [b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
7 e6 i  @! H# `3 jinit:
x,y=5,1,2,7;
, r9 f# Z' s  r/ Vendinit
# y! `9 G5 I* {8 R6 F! Tmin=@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););
9 o; [/ D/ |& H& i: QEND

/ [2 v* D9 b9 D: t