Study On Center Location And Route Optimization Of Regional Logistics Network

With the rapid development of the socialist market economy, logistics as "the third profit source" has taken increasing influence in economic activity for the business community even whole society and has become an important area of competition among enterprises. Regional logistics as an important component of modern logistics system, has an important guiding role in promoting regional economic development. The development of regional economic integration, to promote the increasing of intra-regional and inter-regional logistics, information flow, capital flow and business flow and other flow gradually, intra-regional and inter-regional competition increase among enterprises or different entities. How to speed up regional logistics network optimization and upgrading, thus contributing to sustained, healthy and stable development of the regional economy as an important element of current research.In March 2009, the state council of China enacted logistics adjustment and revitalized the planning and explicitly pointed out:The international financial crisis on the real economy in China has caused great impact, and logistics industry as the important service industry, but also influenced by the financial crisis. All regions and departments should do well the work of optimizing the distribution logistics. At the same time, logistics infrastructure ability is inadequate, and has not set up rational layout, smoothly linking, ability, high efficiency and convenient fully comprehensive transportation system. The regional logistics network planning ability should to be strengthened. So, for the regional logistics network research is not only strengthen regional competition, speed up the top priority of the regional development, and it is to deal with the international financial crisis, enhance the competitiveness of national economy effective measures.Regional logistics network optimization problems usually start from the regional logistics demand analysis and the regional logistics network-level division, on the basis of that selecting the center of the regional logistics network, and finally to the regional logistics network route optimization. Therefore, this paper mainly studied the regional logistics network optimization problem in four aspects:the regional logistics demand forecasting, the regional logistics network-level division, the regional logistics network center location, the regional logistics network route optimization. (1) The regional logistics demand forecasting. Among the demand forecasting models, select the gray prediction model suitable for the area of logistics, detailed derivation of the model was analyzed and found that there are two flaws, improved methods were put forward for the problems to improve the gray prediction precision of the model.The improved gray prediction model was used in this paper, predicted regional logistics development of Liaoning Province in the next few years.By analyzing the predictive value of regional logistics demand, we can see the regional logistics will has developed rapidly of Liaoning Province in the coming years, through the numerical solution, obtained regional logistics future growth factor of Liaoning Province, the coefficient has an important role in optimization of regional logistics center.(2)Division of the regional logistics network-level research in a comprehensive comparison of various clustering methods and select the principal factor analysis, by clustering the different regions of Liaoning Province regional logistics network level has been divided.Division showed that the formation of Liaoning Province, a major regional logistics four levels, namely, Shenyang is the center of the regional logistics radiation circle, along the coast of Dalian as the center of international logistics zone, the western Liaoning Jinzhou logistics center circle and Liaoning provinces radiation logistics and distribution with small towns. Different logistics development in the radiation circle is not the same, and their characteristics are very different, The area of each circle of radiation should be a detailed analysis of its regional logistics development, exceed and features to create a regional logistics. Regional logistics network-level division also has a significant role of the logistics center location in the later chapters, which is a macro view of the number of clusters into a regional logistics, There are great reference value in determining the number of the reginal logistics network center.(3) Site selection study of regional logistics network center. Site selection of regional logistics network is an important part of network optimization, this paper based on the principle of minimum regional logistics costs, established a site selection model of regional logistics for solving the model is mainly carried by K-means algorithm, in using this method before it was improved to optimize the solution method.Choose Liaoning Province regional logistics as the object of empirical analysis, for different areas of Liaoning Province, the special nature of the development of logistics, this paper presents unit normalized model,roadway model, traffic demand forecasting model and the weighted model for the regional logistics, and in these four models based on the proposed road network accoding to the real regional logistics network optimization model.In the algorithm, this paper combines the advantages of the shortest path algorithm and gravity center method, the clustering algorithm was applied to logistics and distribution improvements, proposed to solve the problem of regional logistics network optimization of new algorithms. Innovative models and algorithms are proposed for the reginal logistics only.(4) Studies of route optimization on the regional logistics network. Regional logistics route optimization is a key part of the overall regional logistics optimization of this paper, a detailed analysis of the VRP line optimization theory and algorithm design, came to the line optimization problem to solve regional logistics ideas and methods, Select the part of the regional logistics nodes in the regional logistics route optimization for the empirical analysis.