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In order to balance the number of outbound and inbound tasks of each aisle and improve the working efficiency of the multi-tier shuttle system, three principles of storage location assignment were put forward: the principle of minimum correlation degree, the principle of equalization of product items and the principle of equalization of tasks, which were expected to be followed when storing products...
Applying Flexsim system simulation software to build the simulation model of logistics sorting system. Before the introduction of automatic sorting equipment and technology in the sorting system, through the establishment of the Flexsim simulation model to simulate, analyze and evaluate the design scheme.
As the importance of logistics automation system has increased, researches on related fields such as logistics transportation, city logistics, automation, efficiency, environment friendly technology and unmanned technology have been actively carried out. In order to promote such logistics automation, a huge amount of facilities are invested. Therefore, careful examination of the system is required...
This article describes the development of a Distributed Manufacturing Systems (DMS) simulation platform. Current technological environments leave no space to faulty and un-optimized manufacturing processes. Being able to prevent these processes is crucial to keep manufacturing systems up-to-date and running smoothly. To ensure it, one can use a variety of methods, such as simulation. The simulation...
This paper studies the content of logistics planning simulation. It designs the process and procedure of planning simulation from three aspects, such as discrete event, service object and logistics field work. Discrete event simulation algorithm and service object simulation algorithm are presented. Then it proposes to reconstruct the logistics business process and optimize the existing logistics...
Cluster analysis is important in scientific and industrial fields. In this study, we proposed a novel chaotic biogeography-based optimization (CBBO) method, and applied it in centroid-based clustering methods. The results over three types of simulation data showed that this proposed CBBO method gave better performance than chaotic particle swarm optimization, genetic algorithm, firefly algorithm,...
On the basis of traditional A* algorithm, considered the limitation of qualitative factors, the model of the cost function about the AGV path optimization is added veer times and forward direction, and the algorithm is applied to picking AGV path optimization in the E-commerce logistics. Experimental results show that the improved A* algorithm comparing with traditional A* algorithm has better optimization...
This paper presents a comparison of two logistic systems including an intermediate platform for the collection and delivery of containers with the maritime container terminals in Le Havre Port area. The first one uses a conventional operational organization of a set of rail shuttles. The second one SFM (‘Service Ferroviaire Modulaire’: modular rail service) is based on the first but with teleoperated...
Deshopping is rapidly turning into a modern day scourge for the retailers worldwide due to its prevalence and regularity. The presence of flexible return policies have made retail return management a real challenging issue for both the present and the future. In this study, we propose and develop a multi-agent simulation model for deshopper behavior in a single shop context. The background, theoretical...
To achieve a high logistical performance, adjustments in production structure are inevitable. The impact of structural changes however remains unclear. To investigate the effects of changes concerning production structure on logistical targets, the use of simulation models is possible. In this paper, we propose an approach for dynamically generating simulation models of production structures using...
Early discharge of patients is frequently used as means to control the ratio of rejected incoming patients due to a full Intensive Care Unit. These patient discharge decisions are discussed in the medical literature but few mathematical works have included them in their models. Recently, pioneering works modeled these decisions and obtained different bed-control policies. The so-called cautious policy...
Physical Distribution is a bottleneck in E-commerce and reverse logistics has become a bottleneck restricting the development of e-commerce. This paper constructs the distribution system in E-commerce logistics based on gridding management, via the comparison analysis between grid and non-grid distribution system in E-commerce logistics through computer simulation, verifies the grid used in e-commerce...
Cargo transportation is one of the most important topics in today's fast growing and globalized logistics sector. Ecommerce activities make valuable contributions to cargo and logistics sectors. In this study, technological transfer center of a cargo company in Turkey that consists of infeeds, outfeeds, reject line and a sorter system was considered. The main problem is the imbalance between the expected...
Vehicle to grid technologies (V2G) utilize the batteries in electric vehicles (EV) to provide ancillary services to the electric power grid. In order to maintain a 60-hertz frequency in the electric grid, there exists a wholesale market for frequency regulation (FR), a specific type of ancillary service. This paper examines V2G technology for providing FR, while focusing on the effect FR service has...
The emergence of advanced communication technology has created opportunities to improve transportation in supply chains across the globe. In this paper the main contributors to inefficiencies in present road transportation chains are identified. The paper goes on to describe approaches taken by stakeholders to improve their operational efficiency. A simulation based approach to investigating the impact...
In this paper, we studied the statistical features of user posting behavior in microblog. The number of statuses exhibits a double power-law distribution and there is strong positive correlation between the number of forwarding and comments. According to the empirical analysis of user behavior in both group level and individual level respectively, we find the interval distribution of user posting...
This paper demonstrates a new approach in solving problems with capacity issues within a cement factory in Libya using the Witness simulation package that enables the development of discrete and continuous simulation model to simulate these processes. The model aims to support the implementation of management systems in Supply Chain Management and the introduction of Just-In-Time systems. In order...
In the past, logistics used to be a core function of production and trading companies but many of them started to outsource at least parts of their logistics functions to specialized logistics service providers in terms of logistics contracts. With this, sophisticated business models such as value added logistics service providers evolved which concentrate on tasks of planning, coordination and monitoring...
The paper describes deployment experience of a decision support system for planning fuel supplies within a network of gas stations, which is based on simulation, multiagent and expert modeling. Authors focus on various methods used in decision support system BPsim.DSS. Mainly the system is used by logistical management and planning departments. The system implement such features as forecasting next...
In this paper, we propose a double image encryption method based on the reciprocal-orthogonal parametric (Rap) transform and chaotic maps. In this method, a complex-valued image is constructed by two secret real-valued images, one as amplitude and the other as phase. In addition, two chaotic random phase masks are generated using two non-independent chaotic maps; one mask is multiplied by the resulting...
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