This paper deals with the problem that perishable items are not discarded or sold at reduced prices after reaching their expiration age, but are reprocessed to satisfy another kind of demand.

• 摘要该文考虑了易过期物品到达其固定的寿命期限后，并非被抛弃或降价处理掉，而是被重新加工成另外一种易过期物品以满足顾客的需求；