lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
/ J: V# V/ b& T6 ^3 x' A数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
2 e+ _8 W5 v1 v+ v' A& T（计算段 (CALC ENDCALC)）
( ?, i3 b2 G* T, U+ y( ]MODEL:
( m& ]2 Q) Y! t7 w9 o3 U" _Title Location Problem;
sets:
    demand/1..6/:a,b,d;
5 D$ Y% y0 n9 C# x8 e7 _) e+ J$ ]5 d) m    supply/1..2/:x,y,e;
# U4 K" m* F7 x" P6 s    link(demand,supply):c;
$ `  H$ D& x* C: w0 L1 \! tendsets
data:
$ Y  i: H: g5 c( j) _a=1.25,8.75,0.5,5.75,3,7.25;
: H! z8 l; {6 @2 Ub=1.25,0.75,4.75,5,6.5,7.75;
% v( _' b% T+ i  K+ Z9 h% vd=3,5,4,7,6,11; e=20,20;
1 P0 k% A* ~! @* fenddata
init:
) `% V) r0 f" a, B: l% yx,y=5,1,2,7;
endinit
( `" N' x& A+ Y8 h  ymin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
8 x4 X" z! s; ^3 c@for(demand(i)sum(supply(j):c(i,j))=d(i););
; I" p' ^( Y& v) C7 Y@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END