lingo建模语言与实例4

longde

目标与约束段
" [! j8 b/ ^  j- o集合段（SETS    ENDSETS）
6 r  B& R# ^% j* |& E6 i数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
* k1 x1 k, ]9 A( ~  F( _3 E（计算段 (CALC ENDCALC)）
MODEL:
& W3 t% ~8 D' L, gTitle Location Problem;
+ `9 [& X. q$ O# a3 usets:
2 z3 H3 Z# w4 A* I4 a" r7 e    demand/1..6/:a,b,d;
; F6 g1 C7 S- E+ c  W    supply/1..2/:x,y,e;
    link(demand,supply):c;
4 N8 Y+ N: b' j: {" _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. h  h; @: _& {7 {! s; K  Ad=3,5,4,7,6,11; e=20,20;
( n  F# ]4 {0 M: l$ L/ n5 i+ lenddata
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););
: s9 l# r% f( w* H1 e+ }' Z0 ~1 l@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
$ X, E$ e/ P( ]  _& R% m