lingo建模语言与实例4

longde

目标与约束段
0 {  {" O* ]% d集合段（SETS    ENDSETS）
8 R& q9 G; O7 C* E数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
5 b- w8 f' f) W) r' c( ^. Q7 ^4 ~MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
: n! H$ J. p3 z" p, ]    supply/1..2/:x,y,e;
    link(demand,supply):c;
/ E' z& M; t- q- V+ D% C: Eendsets
data:
) h4 O+ V$ V/ Fa=1.25,8.75,0.5,5.75,3,7.25;
' J+ f7 V4 q' F: rb=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;
/ |+ `, n! [7 x' d+ y& lendinit
9 q0 p" ^- Y8 M0 Wmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
5 A, y4 i/ v! ^* h@for(demand(i)sum(supply(j):c(i,j))=d(i););
/ b0 D% x2 N& Y@for(supply(i)sum(demand(j):c(j,i))<=e(i););
; ~% l( S; G, E8 sEND
6 ?2 E$ n( t, J% S1 N* y1 P