Research On Multimodal Transport Optimization Of Modern Logistic System From The Perspective Of Synergetics

China has entered a new stage of development.Under the new development paradigm with domestic circulation being the mainstay and the two circulations reinforcing each other,logistics industry is transforming from traditional logistics to modern logistics,and has become an inevitable trend of logistics development.Logistics system is an organic whole to realize the intelligent management of material procurement,enterprise production and circulation environment.Multimodal transportation is an important form of modern logistics,and the optimization of multimodal transportation combination is the key technology to achieve the goal of reducing logistics cost and increasing efficiency;the emergence of new transportation technology,inventory mode and consumption format poses new challenges to the optimization of multimodal transportation combination.In this research,the issue of multimodal transport optimization in logistics system is selected as the research object,which is placed in the complex dynamic process of synergetic theory,to explore the activities of multimodal transport portfolio optimization,to build a multimodal transport portfolio optimization decision-making model with strong connectivity,high relevance and wide adaptability,and to explore how the elements,power and mode behind the multi-modal transport portfolio optimization decision-making affect the recognition of enterprise entities cognition,decision-making and action.This is of great theoretical significance to the enrichment and development of synergy theory and multimodal transport portfolio optimization,and is of practical significance to the realization of modern logistics industry reform,empowerment and quality improvement,reducing cost and efficiency,and ensuring the safety of people's livelihood.In this dissertation,based on the complexity of modern logistics multimodal transportation,such as production freight transportation,unmanned aerial vehicle(UAV)-Courier transportation,on the basis of mathematical modeling and simulation analysis method,the author analyzes the multimodal transportation combinatorial optimization problem by using the collaborative theory,and constructs the multi-factor coupling linkage optimization model,which solves the optimization decision-making problems of the multimodal transportation network in the links of material procurement,production and circulation.The specific research work is as follows:(1)The theoretical framework of multimodal transportation optimization and decision-making in logistics system is constructed.First,the dissertation deals with the connotation of logistics system and its characteristics in time,function,means of delivery,customer demand and transportation mode combination,and analyzes the advantages of multimodal transportation in saving transportation time,reducing logistics cost,personalized service and unified and clear responsibility.Second,it analyzes the synergy effect,servo principle and self-organization principle of synergy theory,and expounds the characteristics of multi-agent,initiative,coordination,responsibility and order of collaborative theory.Thirdly,the applicability of synergetic theory to the combinatorial optimization of multimodal transportation in logistics system is expounded.The research work above provides the research basis and analysis framework for the optimization of multimodal transportation in logistics system.Second,in terms of cooperative response,the total system cost of adaptive replenishment and response control strategy is better than that of real-time update strategy.(2)The synergetic optimization model of multi-modal transportation of procurement,production and circulation of logistics system is established respectively.One is the synergetic optimization decision-making problem of(production freight)intermodal transportation considering safety stock and information real-time updating,describing the synergetic optimization decision-making problem of production freight combined transportation considering real-time information updating,and constructs two optimal decision-making models of multimodal transportation without considering safety stock and considering safety stock.Thirdly,considering the synergetic optimization decision-making problem of the circulation link(UAV courier)of revenue sharing contract,the independent optimal decision-making model and the synergetic optimization model of UAV channel and courier channel are established respectively.The researches show that,first,with the updating of demand information,the multimodal transport carrier adopting the safety stock mode can improve the profits of the multimodal transport carrier and the supply network,while the multimodal transport carrier can effectively respond to the random demand through the safety stock model.Second,in terms of cooperative response,the total system cost of adaptive replenishment and response control strategy is better than that of real-time update strategy.Third,the uncertainty of delivery quantity increases,and the profit of UAV channel presents a downward trend;the proportion of "the last mile" delivery market allocation increases,and the optimal delivery quantity of UAV channel and the optimal order quantity of express channel increase at the same time;the expected profit of UAV channel and express channel can realize Pareto improved solutions through improved revenue sharing contract.(3)This author puts forward the collaborative decision-making and inspiration of multimodal transportation in the links of procurement,production and circulation of logistics system in the dissertation.This research solves the problem of synergetic optimization of multimodal transportation in the links of material procurement,production and circulation in logistics system,and provides decision-making reference for multimodal transportation optimization of logistics system.The results show that,firstly,considering the safety stock and real-time information sharing,the synergetic optimization decision-making model of the procurement link(production freight)can effectively respond to the random demand,so as to improve the profit.Second,the total cost of the adaptive replenishment and response control strategy is better than that of the real-time update strategy.Third,the introduction of improved two-way revenue sharing contract can realize the "last mile" UAV and courier "dual channel" terminal distribution collaborative optimization,and achieve Pareto improvement.Based on the synergetic theory in this dissertation,the author studies the optimization of multimodal transportation in logistics system,aiming to avoid the impact of the complex problems of modern logistics in the links of procurement,production and circulation on the improvement of quality and efficiency of logistics enterprises,and gives full play to the advantages of multimodal transport combination optimization,and tries to build a multifactor coupling and joint objective optimization model to solve the procurement-production-circulation,the multi-modal transportation combination optimization decision-making problem of multi-system coordination and total system optimal procurement(production freight),production(unmanned aerial vehicle manned system)and circulation(UAV courier)from three aspects of safety stock,order response and income distribution.The research of this dissertation can provide theoretical guidance and practical reference value for the study of multimodal transportation optimization of logistics system.