| With the rapid development of China's pharmaceutical industry,the medical cold chain logistics industry also presents a new development trend.However,there are some problems such as behindhand logistics technologies,lack of traceability mechanisms and waste of logistics resources.On the one hand,it causes high distribution costs,low distribution efficiency and low customer satisfaction for medical cold chain logistics enterprises,and on the other hand,it also leads to the problem that the safety issues for cold chain medicine distribution can't be effectively guaranteed.This thesis studies on the distribution issues in medical cold chain logistics,in order to reduce the distribution costs of medical cold chain logistics enterprises,improve the distribution efficiency of medical cold chain logistics,improve customer satisfaction,and ensure the safety for cold chain medicine distribution to a certain extent.The specific work of this thesis is as follows:(1)Considering the customer's delivery time window constraints,a soft time window-based medical cold chain logistics distribution path optimization model is established.Based on the dynamic fusion of immune algorithm and ant colony optimization and partial improvement of ant colony optimization,an improved ant colony optimization is proposed.Secondly,the improved ant colony optimization is introduced to solve the model to obtain the optimal distribution path solution.Simulation results show the feasibility of the model and the effectiveness of the improved ant colony algorithm,which can effectively reduce the distribution cost of medical cold chain logistics enterprises,improve the distribution efficiency of medical cold chain logistics and customer satisfaction.(2)On the basis of constructing the joint distribution alliance of medical cold chain logistics,the optimization model and cost allocation model are established.Based on the joint distribution network of medical cold chain logistics,a medical cold chain logistics distribution path optimization model is established.Secondly,a medical cold chain logistics cost sharing model based on joint distribution is proposed,and the Raiffa solution considering risk factors is introduced to solve it.The simulation results show the rationality of the model and the feasibility of the joint distribution mode of medical cold chain logistics. |
