Lingo建模语言与实例4

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目标与约束段
集合段（SETS    ENDSETS）
* ], I6 [) y+ A8 C& l数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
% B$ b; l& C! @. o# K  U4 uTitle Location Problem;
" c/ g% J" Z- m9 X2 q# \  Asets:
. t: S% C+ E2 a    demand/1..6/:a,b,d;
    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
- J# j, h) J) sb=1.25,0.75,4.75,5,6.5,7.75;
; [( v4 L4 G' N! S" I2 O: {% ed=3,5,4,7,6,11; e=20,20;
enddata
8 Z  R& \2 e; c. r$ m) k7 J! k! s: |init:
x,y=5,1,2,7;
+ r7 O; E; E. ~9 b5 E9 \" J- Bendinit
' p" [2 x- D: H5 b; Q1 ]9 `7 }6 {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););
END

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好
5 @4 S% r# L4 r% Y; o: r' K