共查询到19条相似文献,搜索用时 171 毫秒
1.
将SDIRP分解为基于直接配送的随机库存-路径问题的库存子问题和基于车辆路径问题的路径问子题,并设计了一个基于(s,S)库存策略和修正C-W节约法的启发式算法,最后,通过相应的数值算例验证了算法的有效性. 相似文献
2.
库存路径问题(IRP)是车辆路径问题和库存管理问题的结合,对供应商优化库存管理、车辆路线和交货计划,提供集成的物流解决方案具有重要意义。首先对VMI模式下库存路径问题的背景及分类进行综合分析,对引入该问题基础版本的精确算法及启发式算法的相关研究进行系统归纳梳理。针对基础版本外的随机库存路径问题,从有限计划范围和无限计划范围对相关算法的研究文献进行分类总结。最后结合问题发展趋势,对动态随机库存路径问题的研究成果进行归纳,指出IRP问题及算法将向着更加复杂的扩展层面发展。 相似文献
3.
4.
5.
针对逆向物流中的多品种库存问题,建立了基于利润最大化的供应链多级库存模型,并提出了启发式算法求解.最后通过给出算例,验证了模型的实用性. 相似文献
6.
7.
8.
在长期的工程项目物资管理建设中,承包商和供应商在物资库存管理方面具有一定联系。文章分析了传统工程项目物资库存管理存在的弊端,结合供应链的库存管理模式,并基于供应链的库存管理模式提出适合于工程项目物资库存管理的两种模式来解决工程项目物资库存管理中的问题。 相似文献
9.
10.
针对生鲜产品零售商的订货策略制定不当导致库存成本较高的问题,充分考虑零售商库存限制因素及成本控制中的各类因素,通过设计强化学习四元组(环境状态观测、智能体行动、状态迁移、报酬),构建了一个A-C算法的生鲜产品库存成本控制模型。实验结果表明,当库存的相关成本,订货提前期一致的情况下,采用基于AC算法模型的订货策略能够有效降低零售商的生鲜库存成本。 相似文献
11.
12.
文章站在零售商的角度,通过分析需求离散随机库存控制过程中的碳排放因素,设计出基于碳排放成本的随机库存控制模型,对低碳供应链中库存控制的要素进行了分析,并通过算例来说明该模型。模型有利于进一步提升供应链的核心竞争力,推动低碳供应链管理的深入研究。 相似文献
13.
对传统的需求连续随机库存模型进行改进,考虑变质商品的库存模型的建立,采用数学微积分方法进行求解,得到简洁的库存模型公式。并通过实例分析论证了改进模型的可行性与广泛的适用性。 相似文献
14.
将马新安(2000)在定常需求的条件下,建立的一个向多个有能力约束的供应商采购的库存模型扩展到了随机需求条件,并给出了模型的算法。 相似文献
15.
石油企业物资管理问题及对策研究 总被引:2,自引:0,他引:2
本文分析了石油企业物资管理的问题,剖析了产生超储的原因,着重关注了存储模型在石油行业的应用情况。然后依据油田实际情况.以ABC控制法和运筹学原理为理论基础,将需求为连续型的随机存储模型运用于油田材料库存管理中,就完善材料库存管理进行了探索性研究。 相似文献
16.
17.
Optimal structure of joint inventory-pricing management with dual suppliers and different lead times
《管理科学学报(英文)》2021,6(1):1-24
We consider a joint inventory-pricing control problem in a single-product, periodic-review, dual-supplier inventory system. The two suppliers have different lead times. One expedited supplier offers instantaneous replenishment, and one regular supplier requires an L-period lead time for delivery. The supply quantity is stochastic and the demand is price-dependent. For the expedited inventory replenishment, we characterize the optimal policy as a state-dependent almost-threshold policy by extending the stochastically linear in mid-point to a multidimensional setting. To investigate the optimal regular inventory replenishment and pricing policy, we propose the notions of partially stochastic translation (PST) and increasing partially stochastic translation (IPST), which help in obtaining the antimultimodularity preservation in dynamic programming problems. We provide properties, sufficient conditions, and examples for PST and IPST functions. By applying PST and IPST, we obtain the antimultimodularity of the profit functions. The antimultimodular profit functions ensure that the optimal regular ordering quantity and the optimal price are monotone in the current inventory level and outstanding order quantities. Moreover, we reveal that as the time interval increases, the effects of previous outstanding orders on the optimal regular ordering and pricing decisions are decreasing and increasing, respectively. PST and IPST also enable us to further characterize the optimal expedited ordering quantity as decreasing in the inventory level. However, the optimal expedited ordering quantity can be non-monotone with respect to the outstanding order quantities, as shown in the example. 相似文献
18.
The problem of option hedging in the presence of proportional transaction costs can be formulated as a singular stochastic control problem. Hodges and Neuberger [1989. Optimal replication of contingent claims under transactions costs. Review of Futures Markets 8, 222–239] introduced an approach that is based on maximization of the expected utility of terminal wealth. We develop a new algorithm to solve the corresponding singular stochastic control problem and introduce a new approach to option hedging which is closer in spirit to the pathwise replication of Black and Scholes [1973. The pricing of options and corporate liabilities. Journal of Political Economy 81, 637–654]. This new approach is based on minimization of a Black–Scholes-type measure of pathwise risk, defined in terms of a market delta, subject to an upper bound on the hedging cost. We provide an efficient backward induction algorithm for the problem of cost-constrained risk minimization, whose associated singular stochastic control problem is shown to be equivalent to an optimal stopping problem. This algorithm is then modified to solve the singular stochastic control problem associated with utility maximization, which cannot be reduced to an optimal stopping problem. We propose to choose an optimal parameter (risk-aversion coefficient or Lagrange multiplier) in either approach by minimizing the mean squared hedging error and demonstrate that with this “best” choice of the parameter, both approaches have similar performance. We also discuss the different notions of risk in both approaches and propose a volatility adjustment for the risk-minimization approach, which is analogous to that introduced by Zakamouline [2006. European option pricing and hedging with both fixed and proportional transaction costs. Journal of Economic Dynamics and Control 30, 1–25] for the utility maximization approach, thereby providing a unified treatment of both approaches. 相似文献
19.
在考虑到提前期和服务水平的情况下,针对随机需求下的安全库存问题,从定量的角度分析和研究企业应如何设置安全库存,以达到安全库存水平最优,最后以企业实际数据作出算例分析。 相似文献