lingo建模语言与实例4

longde

目标与约束段
" e9 J3 a  K  @5 U1 Z9 A9 O集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
# A, M9 `- V, j/ F（计算段 (CALC ENDCALC)）
# e" A% p" |% ?5 DMODEL:
Title Location Problem;
sets:
& m1 E$ S0 U" K  C    demand/1..6/:a,b,d;
8 H0 L0 d  H9 E2 u& l4 u    supply/1..2/:x,y,e;
: j) [& r$ R3 T- j# [: G    link(demand,supply):c;
7 D$ p) F1 U2 R8 u. }! iendsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
1 m1 h' @1 g, P! Yb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
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););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
1 J/ w, z3 b9 B+ zEND