mode: 定义41以及与之相 6发点8收点运输问题; 关的产量记号 sets warehouses/wh 1.wh6/: capacity, vendors/v1, v8/: demand links(warehouses, vendors): cost 定义派生集及 volume endsets 其属性cx min=@sum (links: cost volume @for( vendors小) @sum(warehouses() z=∑∑cx volume(,))=demand()) @for(warehouses( ∑x=d,=1,2,;8 @sum(vendors(J) i=1 volume(,))<=capacity );8 ∑ i=1,2,6 J=1model: !6发点8收点运输问题; sets: warehouses/wh1..wh6/: capacity; vendors/v1..v8/: demand; links(warehouses,vendors): cost, volume; endsets min=@sum(links: cost*volume); @for(vendors(J): @sum(warehouses(I): volume(I,J))=demand(J)); @for(warehouses(I): @sum(vendors(J): volume(I,J))<=capacity(I)); 定义Ai以及与之相 关的产量记号 Bj dj 定义派生集及 其属性cij, xij ij i j ij Z c x = = = 6 1 8 1 min , 1,2, ,8 6 1  = =  = x d j j i i j , 1,2, ,6 8 1   =  = x y i i j i j