Study On Optimization Of Logistics Distribution System Of Forest By-products

With the fast development of information technique and internet, e-business makes influence on diverse aspects of economic life more and more. Facing with e-business logistics of forest by-products, it has become a vital problem that how to make decisions on the location of logistic distribution centers, demand assignment and route selection, transporting mode, and the establishment of highly-efficient distributing system for the purpose of reducing the cost of distribution and improve service quality to a higher level. Therefore, this research has a high theoretical and practical value.Firstly, the appraisal model and location model of the logistics distribution center of forest by-products are concerned in the thesis. According to the features and requirement of the logistics distribution center of forest by-products, hybrid distribution center location model which is based on service-cost and the location model of the scattered distribution center relyed on time-cost are established. As for the features of multi-variable with0-1and the constraint condition of scattered distribution center, the heuristic algorithm based on decomposition-filtration is adopted in the thesis to solve the problem. While considering uncertainty and the large number of client node of the hybrid distribution center location model, the simulated annealing is adopted to solve the problem. So the fuzzy appraisal model of the logistics distribution center with multi-hierarchy and multi-criterion is established in the thesis, and the weight of criterion of the model is calculated distribution with proportion, while the calculation of fuzzy appraisal value and expected value help to get the weight of sub-index. What's more, the weight of sub-index and the weight of criterion consist of the weight of appraisal index of location scheme under the corresponding criterion. In order to make decisions, the optimal scheme should be formulated through coordinated analysis, in terms of the result of quantitative and qualitative analysis.Secondly, the optimization of vehicle dispatch is studied in chapter four. In order to meet the personalized and diversified requirement of customers, the vehicle scheduling problems with time-windows is divided into two categories:the vehicle scheduling problems with soft time-windows and that with time-windows, according to the service level of the enterprise management and the limited resources of enterprises. In the thesis, the hybrid genetic algorithm based on the Sweep algorithm and operators PMX is designed to solve the vehicle scheduling problems with hard time-windows. By comparing the experimental data, it shows that the hybrid genetic algorithm designed in this thesis is...