Lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
6 f& e' {" v5 H) `数据段（DATA   ENDDATA）
9 l/ `& N6 ?# K9 ?0 B; N& A% k2 ]( E初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
1 f6 `% \* E2 H! [9 i8 e5 ?9 o    demand/1..6/:a,b,d;
1 I% n0 m! G6 \2 C3 q2 [9 j# Q. |/ W; ]' I    supply/1..2/:x,y,e;
% U/ U5 ^- V# a$ e3 N    link(demand,supply):c;
( h% |+ Y4 x/ t0 c. R# v5 l8 Sendsets
data:
! B' g  p2 ?  k$ D3 ?+ Ya=1.25,8.75,0.5,5.75,3,7.25;
. X4 G4 @* q" @b=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;
: R/ m( w8 c# uendinit
min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
' _1 b9 _8 T2 n6 z$ Z/ F' t@for(demand(i)sum(supply(j):c(i,j))=d(i););
2 V- {2 i3 E  b; K9 S: [4 j1 o@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
. G# t" e: d( G# o

longde

好