Study On Location Selection And Route Comprehensive Optimization Of Two-stage Cold Chain Logistics System

The logistics industry,a key component of e-commerce,has seen a dramatic growth in recent years due to the enlargement of e-commerce scope and the enhancement of modern transportation capacity.Influenced by the increasing requirements for food safety and service quality,people’s demand for cold chain logistics is increasing,and its proportion in logistics distribution is also increasing.Our government ardently encourages the utilization of new energy vehicles to reduce greenhouse gas emissions in transportation,distribution,and other activities,in order to effectively address the continuous rise in total greenhouse gas emissions caused by high energy consumption and high emissions of cold chain logistics.Two of the most critical issues in the classic logistics system model are the location-distribution problem(LAP)and the vehicle routing problem(VRP).However,in the LAP model,only the location of facilities and the distribution of goods are considered,but the vehicle routing is less considered;In the VRP model,although the focus is on the itinerant visits of vehicles between various customer points,there is little analysis of the location of facilities,which makes it possible to further optimize the cost of the entire logistics system.This paper investigates the effect of new energy vehicles on cold-chain distribution decision-making,proposing a two-level location-path comprehensive optimization model for cold-chain logistics systems that theoretically supports reasonable decisions and boosts profits.The cold chain logistics industry’s current state of development,the emergence of new energy vehicles,and the two-level logistics system are all discussed in this article.It discusses the significance and necessity of selecting the topic of location and path optimization for the two-level cold chain logistics system.This paper proposes a primary research content and technical route by summarizing and commenting on relevant research both domestically and abroad.Subsequently,it introduces the core concepts and theories of cold chain logistics,such as new energy vehicles,two-level logistics location-path optimization,etc.,in relation to the location-path optimization problem of two-level cold chain logistics systems.This paper proposes a two-level cold-chain logistics location-route optimization model,taking into account constraints such as vehicle capacity,mileage,delivery time,etc.,and constructing the optimal objective function of cold-chain logistics distribution cost.Subsequently,after a comprehensive comparative analysis,the ant colony algorithm is improved and used to solve the model.After analyzing Company A’s operational data and scenario,this paper concludes the model’s realization and solution with MATLAB software.The optimal distribution strategy and cost of Company A are determined,and the practical application of this model is confirmed,furnishing enterprises with a basis for reasonable material flow system planning.