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Bilevel optimization constitutes a specific class of problems where optimization is done at two nested levels — upper (leader) and lower (follower). The two levels are coupled by the requirement of optimality at lower level for each upper level solution. A number of real life problems in engineering, logistics, economics, transportation etc. need to be modeled as bilevel optimization problems due...
Storage assignment policy will directly affect the order-picking efficiency and logistics cost in an automated warehouse. Based on the traditional storage assignment policies which are focused on the storage frequency, we take workload balance into consideration and propose two new storage assignment policies for the automated warehouse. By analyzing and calculating, it is discovered that new storage...
Several factors must usually be taken into account when deciding the design of a supply chain network. In most cases, the economic impact and the resulting service quality are the most common. In this sense, one of the strategies with a big impact in both factors is which inventory centralization level is the most appropriate. High decentralization levels usually provides a better service but with...
In this paper, the demand characteristics of shampoo products with B2C e-commerce environment are firstly analyzed. The issue that retailers provide customers with temporary price discount, and suppliers also offer temporary price discount for retailers is researched. Considering the influence of customers order lead time and payment terms on inventory costs, and then inventory control model is set...
This paper proposes Chaotic Adaptive Particle Swarm Optimisation (CAPSO) algorithm to solve Cubic Cost Economic Dispatch (CCED) problem. A Chaotic Local Search operator (CLS) is introduced in the proposed algorithm to avoid premature convergence. The basic strategy of the proposed algorithm is combining PSO with Adaptive Inertia Weight Factor (AIWF) and CLS, in which PSO with AIWF is applied to perform...
This paper discusses the production of Zhejiang Foreign Trade lean distribution network problems, and proposed a theoretical model to streamline the distribution network of foreign distribution network optimization. Goal is to reduce costs and meet customer needs. The article validates the model by statistical data. Finally, the distribution network is proposed to improve Zhejiang foreign trade.
Currently China is promoting the strategic restructuring of coal enterprises and coal resources have been integrated to some degree. However, with the integration of coal resources, the integration of coal logistics resources is also imminent. This paper proposes to build a four-gradient coal logistics network and particularly deals with the critical problem of selecting the location of coal regional...
This paper determines two solutions of Emergency resource distribution, according to the scene of disaster and the supplier distribution of emergency resource, the types and quantities of the inventory resource. The first one is the single save point - multi-disaster points integer programming model which offers three cases to determine the optimization distribution solution, and uses optimization...
With the constant change of marketing condition, i.e., the variation of market share, shifting customer needs or supply channel et al. lead enterprise group to optimize their logistics system as needed. After the analysis of nowadays enterprise group's logistics characters such as the value chain integration, the integration of purchase & logistics management, the need for advanced logistics system...
Supply Chain Management (SCM) is now an important strategy for companies to gain competitiveness. However, the cost is still the key factor to face. This paper proposes a novel approach to create an optimal logistic plan in SCM with failures such that the required total capacity for logistics is minimum while the reliability retains the highest. Since the globalized economics changes very fast, the...
The port city has promoted the development and optimization of the regional industrial structure with its unique basic resources through agglomeration effect, synergistic effect and the self-increasing effect of the city. And accordingly, the port city has become the mainstay of the regional economic development. Firstly, the paper has illustrated the research background. Then it has carried out macroscopic...
The management of solid waste has received wide attention from economic, environmental and academic because of the complex nature of these services. Technical and economic problems emerge in part because of rising demand due to income, population growth, a rising level of urbanization, and a decline of suitable disposal sites. These problems challenge researchers to search for more efficient solid...
Focusing on the problems of the supply chain of current automobile sales corporations, such as the single sales chain, lack of a consolidated information platform, lack of the concepts of strategic cooperation league, etc. This paper finds out how to construct the optimized two-way supply chain model for the auto sales corporations through the perspective of logistics, information flow, fund flow...
Enterprise resource planning (ERP) system provides a comprehensive integrated solution for enterprise informationization construction; the actual worker custom think this kind of comprehensive integrated solution already is the optimizes method of the enterprise flow and a few scholars study the issue from the view of optimization so far. This article proposes the stock control models from the perspective...
Enterprise Resource Planning system (ERP) provide a comprehensive integrated solution for enterprise informative construction , the practical worker used to think that kind of comprehensive integrated solution already was the optimizes method of the enterprise flow. Therefore, until so far there is no one studying that issue from the perspective of optimized model. For mechanical manufacturing industry...
For the status of regional logistics system layout optimization and the current limitations of the method, considered its main factors and related model, this paper studied the regional logistics system layout characteristics, and comprehensive analysis and evaluation have been done on the factors which may exert impact on service range division with AHP and comprehensive fuzzy evaluation. Those factors...
The optimization of economy-logistics system can create enormous economic benefit, which is a common problem in port cities. This paper puts forward a method to evaluate the harmonious status of economy-logistics system by means of factor analysis and fuzzy mathematics. Then the paper provides a case study of Dalian city. The results indicate that the harmonious development of economy-logistics system...
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