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）
, b7 _+ ]/ w' s1 G& Q（计算段 (CALC ENDCALC)）
MODEL:
, _" }* h) `; W$ T( G% RTitle Location Problem;
& m( K5 C7 E6 wsets:
: Y9 @0 l& f& E9 c: p    demand/1..6/:a,b,d;
0 U7 U6 u$ \% H2 l( L- W) T    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
1 ^; A, `  W- W4 ^& Z7 C9 q) @9 mb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
  w2 R; Z( v# w' B1 Dinit:
9 {3 Y! Y7 V  S  W% C9 v9 Ex,y=5,1,2,7;
endinit
% Y# }4 h  F/ z6 G3 }3 R+ @min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
  n/ ~2 {$ p9 R@for(demand(i)sum(supply(j):c(i,j))=d(i););
7 w5 e5 l/ _9 Y5 }) O# W@for(supply(i)sum(demand(j):c(j,i))<=e(i););
2 a" q( P( w" v$ R/ MEND
! i6 u+ \& R* d; q; e/ [- ^9 H
8 _7 V, T: C5 _5 m2 r! r0 e9 A) T' ^