Research Of The Optimization Model And Algorithm For Highway Express Enterprise Network

Highway Express shows vigor and vitality as a new industriy, with China's rapid economic development. Various types of enterprises express the rapid development, and network optimization is crucial to the development of highway express enterprises. In this paper, we optimize the allocation of network center planning, the network's optimal operation routes, the network codes' layout and the enterprise network business development of a quantitative study from a specific practice.In this paper, the express enterprises' network planning and optimization consist of two phases: the location of the distribution center and the optimization of the express network operation. First, we optimize the distribution center site in-depth study on the basis of the actual business processes. According flows of the goods in distribution center cities are large and their vehicles are often loaded fully, it is not considered in the planning of Express distribution center that other cities with little flow which tried to process network traffic with the operating characteristics. But we studied the random service system, and we established a network positioning of the mathematical model for the express distribution center. Based on genetic algorithm and screening of candidates for the distribution center, a prospective distribution center is set; Then, access to every distribution center, we set up different networks business development levels in all areas under the program , optimize the vehicle routing and select the best network setup. Finally, based on the center location and optimal routes we identified the best distribution center and network nodes' layout and setup the best business development level.In the process of optimizing the operation of the network, this paper presents a critical generalized cost to construct the network optimization objective function, a generalized key cost / business model, and a genetic algorithm was used to solve the set-delivery, many vehicle-models and the not fixed number of vehicles' optimization problems. A generalized key cost / lowest turnover premise that the best routes, and the setting up of the networks node layout and business programs.In addition, the express genetic algorithms were designed with the actual characteristics, and the corresponding computer program module was prepared. Based on a actual enterprise network optimization, we use the algorithms and procedures for the verification for the module. Results show that the algorithm is efficient and practical module. Vehicles' routing optimization in particular, for a full account of the practical aspects of the process, shows that the heuristic algorithm is designed to be modular and procedures, the alignment of program costs can be reduced effectively and be improved efficiency. This paper consists of a two-stage approach which distribution center site planning as the upper floors of the whole network optimization decision, and the network operation optimization as the bottom foundation. Therefore, the whole express network optimization is a pioneering optimization study.