Question

lingo求解非线性规划

model:
sets:
d/1..12/:x,y,k;
endsets

max=@sum(d(i):x(i)*y(i));

@for(d:@gin(x));
@for(d:@mod(x,5)=0);

x(12)>=20;
y(1)>=13;

k(i)=@sum(d(j) | j#le#i : y(j));
@for(d(i) : (x(i)*x(i)/4+k(i)*k(i))<=325*325);

end

错在哪啊！各位高手帮忙看看啊！提示是
model is ill defined！

Answer 1

model:
sets:
d/1..12/:x,y,k;
endsets

max=@sum(d(i):x(i)*y(i));

@for(d:@gin(x));
@for(d:@mod(x,5)=0);

x(12)>=20;
y(1)>=13;

@for(d(i):k(i)=@sum(d(j) | j#le#i : y(j)));
@for(d(i) : (x(i)*x(i)/4+k(i)*k(i))<=325*325);

end