No purchase is necessary for you to enter this competition. 你参加这一竞赛不用买任何东西。
Purchase model under uncertain needs can no longer meet the requirements of modern enterprise. Based on the perspective of supply-chain, the research on purchase model under random needs is necessary. 确定性需求下批量采购模型已经不能满足现代企业的要求,基于供应链的角度建立随机约束模型并深入研究已很有必要。