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Search Results: 1 - 10 of 12748 matches for " assignment storage policy "
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Using Simulation to Object-Oriented Order Picking System
Ming- Feng Yang
Information Technology Journal , 2008,
Abstract: Simulation is one of the most frequently used techniques for production system study and design. Simulation created by an object-oriented program has the advantages of hierarchical structures, inheritance, polymorphism and object re-use. This study uses eM-plant, the standard object-oriented software to model the order picking system. Order picking is an essential operation and the major cost constituent of the distribution center. This study attempts to provide the warehouse manager with order picking and operation; examines several storage assignment policies and several sensitivity analyses. The simulation experiment results can offer reference bases for warehouse administrator decision-making.
Genetic Algorithm for Scattered Storage Assignment in Kiva Mobile Fulfillment System  [PDF]
Mengcheng Guan, Zhenping Li
American Journal of Operations Research (AJOR) , 2018, DOI: 10.4236/ajor.2018.86027
Abstract: Scattered storage means an item can be stored in multiple inventory bins. The scattered storage assignment problem based on association rules in Kiva mobile fulfillment system is investigated, which aims to decide the pods for each item to put on so as to minimize the number of pods to be moved when picking a batch of orders. This problem is formulated into an integer programming model. A genetic algorithm is developed to solve the large-sized problems. Computational experiments and comparison between the scattered storage strategy and random storage strategy are conducted to evaluate the performance of the model and algorithm.
Análise do armazenamento de milho no Brasil em um mercado de economia aberta
Guimar?es, Vania Di Addario;Barros, Geraldo Sant'Ana de Camargo;
Revista de Economia e Sociologia Rural , 2006, DOI: 10.1590/S0103-20032006000400007
Abstract: a dynamic rational expectation storage models was developed to represent the brazilian corn market in the late 90?s. in theses years the brazilian agricultural price policy changed from a buffer stock scheme to a producer price subsidy (prêmio para escoamento de produto - pep) and the brazilian market was open to international trade. the model was estimated through stochastic dynamic programming. the results show that with open markets, exports and imports play the role of shocks absorbers, played by storage in closed economies. results suggest that the producer price subsidy policy may lead the country to be an exporter, depending on the relative values between minimum price and export price at the cost of ever increasing government expenditures.
Design and Simulation of Storage Location Optimization Module in AS/RS Based on FLEXSIM
Guiliang Zhou,Lina Mao
International Journal of Intelligent Systems and Applications , 2010,
Abstract: This paper firstly points out the importance of the storage location optimization in Automated Storage and Retrieval Systems (AS/RS). Then it has analyzed the basic situation of the current storage location assignment strategy, and indicated the deficiency of the storage location selection under the current strategy. Afterwards, it has designed the storage location optimization module in AS/RS. And then it has constructed the mathematical model on the storage location assignment in AS/RS, and then optimized and solved it, performed instance simulation design and analysis on the storage location assignment by means of Flexsim. Finally, it has concluded that the storage location assignment model after optimization would solve the storage location assignment problem in AS/RS effectively and improve the loading-unloading efficiency, as will provide technical support for the enterprise to improve efficiency and reduce cost.
高密度敏捷配送系统货位分配模型
Distribution Model of High Density Agile Delivery System
 [PDF]

王冠峰, 于洋, 张强, 杨帅, 李翔
Instrumentation and Equipments (IaE) , 2015, DOI: 10.12677/IaE.2015.33011
Abstract: 由于传统的自动化立体仓库本身结构的特点,使其在出入库频率和空间利用率方面具有一定的限制。因此,研究设计一种实现敏捷配送的仓储配送系统,实现货物的自动前移和敏捷连续配送可以解决这样的问题。为了提高系统的出库效率,提出了一种针对高密度敏捷配送系统货位分配的改进方式,设置备货货道。论文主要分析高密度敏捷配送系统的货位分配问题,根据系统的特点建立货位分配的数学分配模型。结果表明,该模型极大地缩减了系统的出库操作时间,也缓解了出库高峰期的工作,使得客户的等待时间最小化。
There are certain limitations on the frequency of warehouse and space utilization rate because of the structure characteristics of traditional warehouse. Researching and designing a storage and distribution system which has high storage density, can forward the goods automatically and can move goods from storage continuously and briskly will solve such problem. In order to further improve the outbound efficiency of the system and save the total time, an improved method for storage location assignment of high density agile delivery system has been proposed to set stocking cargo passage. Storage location assignment of high density agile delivery system was analyzed, the principle of storage location assignment was determined, and the mathematical model for the storage location assignment was established. The result shows that such model greatly reduces operation time of warehouse system, and eases the peak of assignments work, and consequently the waiting time of the customer is minimised.
Development of an OLAP Based Fuzzy Logic System for Supporting Put Away Decision
C.H.Y.Lam,S.H.Chung,C.K.M.Lee,G.T.S.Ho
International Journal of Engineering Business Management , 2009,
Abstract: In today`s rapidly changing and globally volatile world, manufacturers pay strong efforts on conducting lean production, outsourcing their components, and management on the complex supply chain. Warehouse management plays a vital role to be a successful player in the any kinds of industry which put-away process is a key activity that brings significant influence and challenges to warehouse performance. In this dynamic operating environment, minimizing the operation mistakes and providing accurate real time inventory information to stakeholder become the basic requirements to be an order qualifier. An OLAP based intelligent system called Fuzzy Storage Assignment System (FSAS) is proposed to increase availability of decision support data and convert the human knowledge into system for tackling the storage location assignment problem (SLAP). To validate the feasibility of this proposed system, a prototype will be worked out for a third party logistics company.
Assignment Model for Charging of Thermal Energy Storage by Electric Chillers Using Zero-one Programming Approach
Adzuieen Nordin,Mohd Amin Abd Majid
Asian Journal of Scientific Research , 2013,
Abstract: Thermal Energy Storage (TES) system is commonly installed at District Cooling plant for storing of chilled water (CHW). The stored CHW is used to support requirement of chilled water during day time. Charging of the TES tank by the electrical chillers (EC) is done during off-peak hours. For the case of TES tank at Universiti Teknologi PETRONAS, the charging of TES tank is done from 6 p.m. to 6 am. To ensure optimum TES charging, the operations of EC need to adhere to an optimum scheduling strategy. To address this requirement, an assignment model using transportation model is proposed. The model is formulated as a zero-one programming model. Spreadsheet is used for solving the model. Results from analysis indicate that maximum production of chilled water depends on the generating capacity of the EC. Results from three case studies indicate that all EC were operated at below rated capacity. Based on the weekly data, the maximum operated capacities of EC1, EC2, EC3 and EC4 are 308, 288, 295 and 270 RT, respectively. This is below rated capacity 325 RT of the EC. The outcome is that TES is not charged to full capacity during off peak period. From the sensitivity analysis using the proposed model, TES could be fully charged during the off peak period. An example, if three of EC are operated to full capacities for specified off peak period, TES could be fully charged. The model could be useful for the UTP District Cooling plant to schedule EC for charging of TES during off peak hours.
Proposed Heuristic Method for Solving Assignment Problems  [PDF]
S. K. Amponsah, D. Otoo, S. Salhi, E. Quayson
American Journal of Operations Research (AJOR) , 2016, DOI: 10.4236/ajor.2016.66040
Abstract: Assignment of jobs to workers, contract to contractors undergoing a bidding process, assigning nurses to duty post, or time tabling for teachers in school and many more have become a growing concern to both management and sector leaders alike. Hungarian algorithm has been the most successful tool for solving such problems. The authors have proposed a heuristic method for solving assignment problems with less computing time in comparison with Hungarian algorithm that gives comparable results with an added advantage of easy implementation. The proposed heuristic method is used to compute some bench mark problems.
一种高效的具有属性撤销的访问控制协议
An access control protocol with efficient revocation in cloud storage

张键红,赵旭冰
福州大学学报(自然科学版) , 2015, DOI: 10.7631/issn.1000-2243.2015.06.0753
Abstract: 采用外包计算技术构造一种基于密文策略的属性加密数据访问控制方法,具有高效的属性撤销功能,可以减少用户的计算量和通信量. 其最大特点是将解密秘钥分为两部分,一部分发送给云服务器,另一部分发送给用户,使得云服务器可以帮助用户解密密文,减少了用户计算量,也减少了用户和云服务器的通信量.
We construct an attribute-based encryption protocol. The protocol has the property of efficient attribute revocation,the program cloud reduce the amount of computing and communication. The secret key is divided into two parts,one part is sent to the cloud server,the other part is sent to the user. It transfers the most amount of computation to the cloud server,and reduces the amount of computation of users
Public support for neonatal screening for Pompe disease, a broad-phenotype condition
Stephanie Weinreich, Tessel Rigter, Carla van El, Wybo Dondorp, Pieter Kostense, Ans T van der Ploeg, Arnold JJ Reuser, Martina Cornel, Marloes Hagemans
Orphanet Journal of Rare Diseases , 2012, DOI: 10.1186/1750-1172-7-15
Abstract: A consumer panel (neutral group) and (parents of) patients with Pompe disease (Pompe group) were sent information and a questionnaire. Responses were analyzed of 555 neutral and 58 Pompe-experienced informants who had demonstrated sufficient understanding.87% of the neutral group and 88% of the Pompe group supported the introduction of screening (95% CI of difference -10 to 7%). The groups were similar in their moral reasoning about screening and acceptance of false positives, but the Pompe-experienced group expected greater benefit from neonatal detection of late-onset disease. Multivariate regression analysis controlling for demographics confirmed that approval of the introduction of screening was independent of having (a child with) Pompe disease. Furthermore, respondents with university education, regardless of whether they have (a child with) Pompe disease, were more likely to be reluctant about the introduction of screening than those with less education, OR for approval 0.29 (95% CI 0.18 to 0.49, p < 0.001).This survey suggests a rather high level of support for newborn screening for Pompe disease, not only among those who have personal experience of the disease but also among the general public in the Netherlands. Optional screening on the basis of informed parental consent is probably unrealistic, underlining the need for new guidelines to help policymakers in their consideration of newborn screening for broad phenotype conditions.New treatments as well as high-throughput and multiplex screening methods are stimulating policymakers and legislators to consider adding new diseases to blood-based neonatal screening panels. An internationally accepted goal of neonatal screening is benefit for the neonate [1]. Lately, neonatal screening policy discussion is also addressing the value of genetic knowledge for family members besides the infant [2] and the value of a predictive diagnosis without the (immediate) possibility or need for intervention [3]. Several lysos
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