Research On Multimodal Transport Service Composition Considering Carbon Emissions

The rapid development of economy and trade makes the logistics become more and more important in the national economy.The optimal allocation of logistics resources is not only an important way to improve logistics operation efficiency,but also has become an effective approach to improve the social competitiveness.As an important form of optimal allocation of logistics resources,logistics service composition can exert the advantages of various logistics resources and obtain the best composition of logistics resources to meet the needs of users.Under "the Belt and Road" initiative,multimodal transport has obtained more and more attention.As a typical form of logistics services composition,multimodal transpo rt can fully exert the advantages of various transport forms to reduce logistics costs,and to improve logistics efficiency through composition,and to obtain the best transport composition to meet the constraints.Therefore,this thesis studies the related methods of multimodal transport service composition considering carbon emissions,and presents the optimal transport route and transportation options,on the basis of fully understanding of the process of multimodal transport.Starting with the characteristics of the logistics field,this thesis establishes a conceptual model of the cloud logistics service mode,and analyzes the process of cloud logistics service composition.After that,th is thesis establishes the QoS attribute set of logistics service,and puts forward the QoS application framework of logistics service;proposes the calculation method of carbon emissions in trunk and transit transportation process;analyzes the multimodal transport process,abstracts the multimodal transport service composition process;proposes the measurement method of logistics service QoS attributes,and also establishes a multimodal transport service composition model.And then,this thesis puts forward a fuzzy weight determination method combining subjectivity and objectivity.The subjective weights of user are calculated by using triangular fuzzy numbers,and fuzzy objective analytic hierarchy process is proposed to calculate the objective weight of experts and historical users in the field of logistics at the same time.In order to fully respect the subjective opinion of user,a combination of weight calculation method is proposed,through which the importance among user,logistics experts and historical users can be weighted,and a reasonable weight value will be p roduced.Finally,a multimodal transport service transport network map is built and partial real data is collected through websites and softwares,after which the related service composition case is solved by adopting the Genetic Algorithms.The optimal transport routes and multimodal transport mode will be obtained immediately after that,and multimodal transport development proposals can also be acquired after analyzing the results.Given that multimodal transport has become an important transport mode,reasonable composition of multimodal transport services can make full use of various transport modes,thus achieving the goal of rational use of logistics resources.Meanwhile,the awareness of environmental protection can also be raised,and the carbon emissions during multimodal transport can be reduced,to some degree,considering the factors of carbon emissions.