Research On Cold Chain Low-carbon Distribution Path Selection Of Fresh Agricultural Products Under Time-Varying Road Network

In order to seize market share and reduce costs and increase efficiency,fresh agricultural product distribution companies are striving to improve the efficiency of cold chain distribution and reduce the total cost of distribution.Consumers are paying more and more attention to the quality of fresh agricultural products,and urban residents increasingly require The demand for improving the urban traffic environment is becoming stronger.Fresh agricultural product distribution companies can only better meet market demand if they strive to improve their cold chain distribution levels.Therefore,thesis studies the closed-loop cold chain distribution path planning of fresh agricultural products in a time-varying road network.The thesis first summarizes the relevant theories of the research topic,based on the theoretical analysis of the timevarying characteristics of the urban road network,divides the delivery time into several time periods,designs the calculation method of the vehicle travel time in different time periods,and according to the different carbon emission composition,Different carbon emission calculation formulas are used to calculate the carbon emission cost of the entire distribution process;secondly,factors such as vehicle capacity limitation,customer demand,time window,service time,etc.are comprehensively considered,and the cost of vehicle transportation,the cost of damage to fresh agricultural products,and the The sum of the refrigeration cost of fresh agricultural products is regarded as the economic cost of distribution,the carbon emission cost is regarded as the environmental cost,the goal is to minimize the sum of the economic cost of distribution and the environmental cost,and customer satisfaction and time penalty costs are used as constraints to build a cold chain of fresh agricultural products.TDVRP mathematical model of carbon distribution,and then according to the characteristics of the model constructed in this paper,the algorithm and parameters of the model solution in this paper are determined,and the genetic algorithm for the model solution is designed.Finally,the actual cold chain distribution information of fresh agricultural products from a distribution center in Zhengzhou is used as a simulation simulation The experimental data,through MATLAB software,calculated and analyzed the objective function value under the objective function value of the model constructed in the paper under the situation of six different speeds(three different static speeds and three different time-varying strengths),which effectively verified This article considers the superiority of time variation and the rationality of the model constructed in the thesis.Cold chain distribution companies consider time-varying factors and carbon emission factors when planning routes,which can not only improve customer satisfaction and reduce environmental pollution caused by carbon emissions,but also save the economic cost of the company’s distribution.The research of the thesis enriches the theory of cold chain distribution of fresh agricultural products,is conducive to promoting cold chain logistics enterprises to establish management concepts that are more in line with the development of lowcarbon economy,and provides method references for realizing the low-carbon distribution path planning of cold chain logistics of fresh agricultural products.Environmental pollution and maximizing customer satisfaction,while saving economic costs,have important practical guiding significance.