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Chinese Journal of Management Science ›› 2023, Vol. 31 ›› Issue (12): 203-214.doi: 10.16381/j.cnki.issn1003-207x.2022.0461

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Green Vehicle Routing Model and Its Solution Algorithm in Cold-chain Logistics Distribution

Xian-cheng ZHOU1,2,Tao-ying JIANG2,Cai-hong HE3(),Li WANG1,Yang LV1   

  1. 1.School of Intelligent Engineering and Intelligent Manufacturing,Hunan University of Technology and Business,Changsha 410205,China
    2.School of Advanced Interdisciplinary Studies,Hunan University of Technology and Business,Changsha 410205,China
    3.School of Accounting,Hunan University of Technology and Business,Changsha 410205,China
  • Received:2022-03-07 Revised:2022-06-30 Online:2023-12-15 Published:2024-01-06
  • Contact: Cai-hong HE E-mail:hecaihong1991@163.com

Abstract:

In recent years, fresh food e-commerce in China has developed rapidly, with a significantly growing demand for cold-chain logistics distribution. In order to promote energy conservation and emission reduction in cold-chain logistics, the Green Vehicle Routing Problem in Cold-chain Logistics Distribution (GVRPCLD) has attracted increasing attention from both academia and industry. The GVRPCLD discussed in this paper involves set constraints, including (1) distribution center locations, (2) capacity-constrained homogeneous refrigerated vehicles, (3) customers’ number, locations, demands, time windows, service times, and (4) a low temperature kept in the cabin during distribution. The optimal vehicle routing plan is expected to realize the dual goals of total cost minimization and customer satisfaction maximization. Specifically, there are five types of costs that are included in the total cost, which are vehicle usage cost, deterioration cost, cooling cost, fuel consumption and carbon emission cost, and piecewise penalty costs for earliness and tardiness of deliveries. In the design, a freshness decay function is firstly applied to calculate the deterioration cost during distribution. Based on the comprehensive mode emission model (CMEM), the measurement functions of fuel consumption and carbon emission are determined, with the consideration of the influence of vehicle load, speed, low temperature and other factors on fuel consumption and carbon emission rate. Then, a customer satisfaction function is established according to the relationship between delivery time and customer satisfaction. Finally, a dual-objective GVRPCLD optimization model is constructed. In order to solve the GVRPCLD model, a hybrid algorithm (VNSNSGA-II) is designed in this paper, which is based on the Non-dominated Sorting Genetic Algorithm II (NSGA-II) and the Variable Neighborhood Search (VNS). The basic idea of the algorithm can be described as follows. Firstly, the VNS is used to optimize some chromosomes in the population to expand the solution space. Secondly, the NSGA-II is performed to obtain non-dominated sorting and crowding degree. Thirdly, based on the individual's rank and crowding distance, the top 50% of chromosomes are obtained and retained as new parent population. Finally, the Pareto-optimal set is obtained by iteration. The simulation results show the following. For one thing, the GVRPCLD model can achieve multi-objective optimization among logistics cost, deterioration cost, fuel consumption and carbon emissions, and customer satisfaction. Furthermore, it is found that logistics cost is negatively correlated with customer satisfaction, indicating that the delivery plan makers can choose different delivery options according to their preference. Last but not least, the proposed VNSNSGA-II is tested, and it is confirmed that the algorithm can contribute to a Pareto-optimal set.

Key words: cold-chain logistics distribution, green vehicle routing problem, NSGA-II, variable neighborhood search

CLC Number: