Question

用lingo语言如何表达 ∑Xkit=1,t属于T，T=(1,2,3..,30),k=(1,2,..20),i=(1,2,..6)

Answer 1

这样子就行了，你看看：
sets:
t_c/1..6/: c;
t_k/1..3/: k;
t_z(t_c, t_c): z;
t_y(t_c, t_k): y;
t_x(t_c, t_c, t_k): x;
endsets

max = @sum(t_y(I, J): y(I, J)*c(I));
!min = @sum(t_x(I, J, M): x(I, J, M)*z(I, M));

@sum(t_x(I, J, M): x(I, J, M)) = @sum(t_y(I, J): y(I, J));

@for(t_x: @bin(x));
@for(t_y: @bin(y));

data:
c = 50 80 30 55 35 20;
z = 1 8 12 14 10 16
8 1 6 18 16 16
12 18 1.5 12 6 4
16 14 4 1 16 12
18 16 10 4 2 2
16 18 4 12 2 2;
enddata