Research On Multi-Objective Route Optimization Of Collaborative Distribution Of Cold Chain Logistics

With the rapid development of science and technology in our country,people’s living standard has gradually improved,and the requirement of the freshness degree of food is more and more high.More and more people begin to pay attention to the quality and distribution efficiency of fresh agricultural products,and cold chain transportation is an important link.Fresh agricultural products are prone to corruption and deterioration in the process of distribution.Therefore,reasonable planning of cold chain logistics distribution route can ensure the freshness of products,reduce the distribution cost of enterprises,and ensure the time requirements of customers.It is an important way to improve the service ability of cold chain logistics enterprises and improve the market competitiveness.At the same time,collaborative distribution mode can also reduce unnecessary long-distance transportation,and achieve social benefits such as easing traffic and protecting the environment.Based on the current situation of cold chain logistics market of fresh agricultural products and the characteristics of fresh agricultural products,this paper focuses on the analysis of cold chain logistics under constant speed and time-varying speed collaborative distribution multi-objective path optimization problem.This paper takes cold chain logistics as the research object and collaborative distribution route optimization as the research focus.The multi-objective route optimization problem of collaborative distribution of cold chain logistics is deeply studied.This paper first expounds the research background and significance,and then reviews the related literature at home and abroad,and discusses the advantages and disadvantages of the existing research.Again,the research methods and contents of this paper are proposed,and the possible innovation points and technical roadmap of this paper are given.Then,according to the problems studied in this paper,cold chain logistics,collaborative distribution and multi-objective optimization and other related theoretical basis are introduced.Finally,when discussing the multi-objective route optimization problem of collaborative distribution of cold chain logistics,this paper divides the problem into two sub-problems: multi-objective route optimization of collaborative distribution of cold chain logistics at constant speed and multi-objective route optimization of collaborative distribution of cold chain logistics at time varying speed.Aiming at the multi-objective route optimization problem of cold chain logistics collaborative distribution under constant speed.In the first step,the collaborative distribution route optimization model is established.In the second step,based on the collaborative distribution route optimization model,a multi-objective route optimization model for collaborative distribution of cold chain logistics is constructed without considering the time-varying velocity.In the third step,NSGA-Ⅱ algorithm is designed.In the fourth step,through algorithmic programming,a numerical example is solved to obtain the results and analyze them.Aiming at the multi-objective route optimization problem of cold chain logistics collaborative distribution under time-varying velocity.Firstly,the vehicle speed function of continuous variation is established.Secondly,based on the collaborative distribution route optimization model,a multi-objective route optimization model of collaborative distribution of cold chain logistics is constructed with considering time-varying velocity.Again,the multi-objective genetic algorithm is designed.Finally,an example is solved using algorithmic programming,and the obtained results are analyzed.The results show that the model constructed and the algorithm designed in this paper are accurate and feasible.Each sub-problem can be solved by solving examples to obtain the route optimization scheme of cold chain logistics collaborative distribution.The research results can provide theoretical support for the rational formulation of cold chain logistics collaborative distribution route optimization scheme.The model and algorithm in this paper are helpful for the distribution center to reasonably develop the optimization scheme of cold chain logistics collaborative distribution route.The proposed scheme can reduce the total distribution cost as much as possible while improving customer satisfaction.In addition,collaborative distribution also reduces unnecessary long-distance transportation and relieves traffic pressure,which has certain practical significance.