中文摘要：

供应商给予临时价格折扣、并针对采购商的临时订货给予优惠的延期支付条件；同时考虑到采购商的自身需求即为终端需求并对价格敏感，由于考虑需求量变化的同时考虑到时间因素，因此需求率实际上发生了改变。在这样的背景下，采购商在价格变化时刻面临两种选择：以低价购进大量货物或者放弃这个机会。本文以EOQ模型单位产品成本为参考，从成本节约最大的角度出发，分析了采购商临时订货量的确定过程，并用数例分析了参数变化对最优订货以及成本节约情况的影响。

英文摘要：

The optimal replenishment with permissible delay in payment （DIP） and varying demand rate under temporary price discounts is considered in the paper. In reality, temporary price discounts are prevalent as a promotion method in marketing. And the supplier may permit the buyer to postpone the payment for items in order to encourage him to order much more. Because the demand rate of the buyer may be influenced by price after it is discounted, the order policy will be different from determined demand as studied in previous literatures. When price changes, the buyer can choose between placing an temporary order and no ordering. Based on the maximization of the difference of costs of these two strategies, the optimal temporary order policy is obtained, and a numerical study is presented to illustrate the analysis.