lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
5 P0 a! I7 v! u8 m! E初始段（INIT  ENDINIT）
( ^" O' p; t* n2 D9 i/ R（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
) e/ ]/ ?" J; Y$ h    supply/1..2/:x,y,e;
$ d5 B# V) h; {) d) G  W+ j4 O    link(demand,supply):c;
endsets
data:
- T* l. v: e  ?; {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=3,5,4,7,6,11; e=20,20;
3 b0 L  a! G/ G( t. Q" denddata
init:
x,y=5,1,2,7;
; O8 D) N9 C* g4 Xendinit
) u5 e! u! z6 G) [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););
7 @$ G- v6 T, V: j8 z/ ?+ e9 f@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END
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