lingo建模语言与实例4

longde

目标与约束段
' T8 e, }3 O! A2 r集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
2 D4 }0 o7 A" E' [2 A$ L6 MTitle Location Problem;
$ C& q0 D! Y8 t6 ?7 f/ c( d! Ssets:
) y  z% A3 f& j' G    demand/1..6/:a,b,d;
) {6 S- S" L% e* P    supply/1..2/:x,y,e;
( I$ T1 {; `" ?4 ?    link(demand,supply):c;
) N5 I& E  f+ [/ a. b) I4 y6 Mendsets
& D# x4 j& D/ U) v7 c' Vdata:
a=1.25,8.75,0.5,5.75,3,7.25;
! j* W/ |- s& W) p" Ib=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
" }$ g5 P8 y( yenddata
init:
x,y=5,1,2,7;
endinit
. y( M. V6 {6 Z: \/ N& f# Y: Lmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
. q7 C8 i: l" ~9 ]@for(demand(i)sum(supply(j):c(i,j))=d(i););
# S% [! U1 d6 U@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
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