Lingo建模语言与实例4

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目标与约束段
+ ^7 k& }7 [- B2 R' B# `: @7 X9 V集合段（SETS    ENDSETS）
/ W; s8 u5 c$ k7 N3 `" E  h+ P数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
! D! z* @4 t7 ~0 }9 x- C2 JTitle Location Problem;
sets:
& m3 S4 `" ^$ ~. j+ M    demand/1..6/:a,b,d;
" @0 O2 B" F9 V$ ~% b& j/ V    supply/1..2/:x,y,e;
    link(demand,supply):c;
endsets
data:
* m- X& d8 q5 za=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;
enddata
init:
x,y=5,1,2,7;
endinit
! i2 ^' e4 m! e! f3 }" T4 S/ Fmin=@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););
% U& I% G" _9 o# F# Y@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END

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好