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需求及回收品数量和时间的不确定性,导致制造-再制造系统的库存管理非常困难.为控制库存尽可能位于某一合理区间内,在假设库存水平变化由无负跳跃Lévy过程描述条件下,利用更新过程和鞅理论,构建了系统期望折扣总费用模型,并采用交叉熵法确定最优的生产速率和调整阈值.最后,通过仿真实验分析了回收品、需求和系统参数对最优控制策略和期望折扣费用的影响.
Uncertainty over the quantity and timing of requirements and returns, resulting in very difficult inventory management of the manufacturing-remanufacturing system To control inventory as much as possible within a reasonable range, suppose the change in inventory levels is described by the non-negative jump Lévy process , The renewal process and the martingale theory are used to build a model of the expected total cost of the system and the cross entropy method is used to determine the optimal production rate and the adjustment threshold.Finally, through simulation experiments, the optimal control The impact of policies and expectations on discounts.