Study On Optimization Of Vehicle Distribution Routing Of Cold-chain Logistics For Fresh Agricultural Products

Fresh agricultural products have the particularity of perishable,so in the distribution process on the time,the environment and other demanding,coupled with the modern society of people more and more concerned about the quality of the product,the freshness of the product requirements are getting higher and higher,cold-chain logistics distribution is paid more and more attention.Reasonable arrangement of cold chain logistics distribution path,not only can reduce the delivery time of fresh products,save delivery mileage,but also can reduce the delivery process of cargo damage and energy loss,save delivery costs,the most important thing is to ensure the quality of fresh agricultural products,increase customer satisfaction with the distribution service and satisfaction.This paper first analyzes the current situation of cold chain logistics and path optimization at domestic and abroad and the shortcomings of their research,discusses the relevant theories of cold chain logistics and vehicle routing problems;Secondly,fully consider the perishable characteristics of fresh agricultural products as well as the necessary conditions in the distribution process,the distribution costs were analyzed in detail.The cost of distribution in this paper have five parts,there are fixed cost,transportation cost,cargo cost,penalty cost and energy cost.Through the reasonable assumption,the optimization model of the cold chain logistics vehicle distribution route with the minimum total cost of distribution is taken as the objective function.In this paper,the ant colony optimization is used to solve the model.In the design of the algorithm model,the ant colony optimization is improved,the distribution cost and the transfer probability are linked,and the roulette selection strategy and the maximum and minimum ant colony optimization are introduced to realize the solution of the model.Finally,using the case analysis,using MATLAB software to write the algorithm program,the results verify the rationality and feasibility of the model.