针对应急物资品种固定、出入库随机性强、周期多且不固定等特点,提出了单品种多周期库存最佳经济模型的构建方法.在考虑初期的库存水平的基础上,寻找最佳订货时机的库存量临界点,以此确定周期内的订货量,并通过理论推导和数值实例验证了模型的经济性和可行性.模型可为应急物资储备管理单位优化库存管理提供理论依据.“,”Regarding the intrinsic features of emergency materials,i.e.,fixed variety,strong randomness of the in-storage and the out-storage,and being held for multiple periods of time but not regularly,we propose an optimal inventory model for single and multiple periods.The model analyzes the critical storage point at an optimal moment,which determines the order quality.Theoretical derivation and numerical examples illustrate the economy and efficiency of the model.The result supplies a theoretical basis for warehouse management of reserved emergency materials.