中文摘要：

研究了基于Ramp-型需求及混合指数分布变质率的变质性物品的库存系统的订货策略问题。在假设物品的需求率为分段函数形式下,分别就库存系统起始条件为现货销售和预销售的情形建立了相应的库存模型,并给出了模型的最优库存策略。同时,对该库存模型的最优策略进行了数值算例检验,并对主要参数进行了灵敏度分析。

英文摘要：

In this paper,we study the inventory models for hybrid exponentially deteriorating items with ramp-type demand rate,assuming the demand rate being an exponential function under limited capacity.We first consider the model starting with spot-sale policy,and then the model starting with pre-sale policy.We propose an inventory replenishment policy for each inventory model,respectively.The results are illustrated with several numerical examples for both models.