Research On Modeling Method And Application Of Coal Terminal Logistics System Based On Agent

As the transit place for coal,coal terminal plays an important role in the development of global economy and trade.At the same time,the researches on coal terminal logistics system include multi-level and multi-type problems,such as plane layout,process design,operation management strategy formulation,etc.More and more scholars are committed to using system simulation technology to study it,it's very urgent to explore a modeling and simulation method of strong reusability and good scalability,which is suitable for different types of coal terminal logistics systems.The researches in this thesis are carried out under this background,on the basis of general character abstract analysis of internal and external compositions in the coal terminal logistics system,combining with agent theory,discrete event dynamic system theory and system simulation technology,a modeling method of coal terminal logistics system based on multi-agent is proposed and applied to case study.The main research results obtained are as follows:(1)On the basis of clarifying the compositions and hierarchical relationships in the transition and export coal terminal logistics system,the system plane layout,operating equipment and process,input and environment are analyzed in depth,the general character analysis of system is carried out.Combining with agent theory,the agents of coal terminal logistics system are divided,and the function of each agent is further analyzed,which lays the foundation for the later study.(2)Under the guidance of multi-agent system architecture and modeling method,on the basis of classification and function of agent in coal terminal logistics system,the structural models of various agent sub-systems are established,various agents are formalized described by multi-group,and the overall structural models of the different types of coal terminal logistics system are constructed respectively.The interaction and cooperation mechanisms of multi-agent systems are further studied.(3)From the user's point of view,the requirements and the feasibility of platform development about coal terminal logistics system model based on multi-agent are analyzed deeply.The modeling basic unit,WCL language and functions,module packaging and interaction interfaces are sequentially described.And then through Visual C++ and modeling platform Witness,the blackboard model is used for communication to establish the system model.Finally,formulas indicate the statistical parameters of the model,and the validity of the model is verified.(4)Taking a practical coal terminal as the research object,the method above is applied to establish the corresponding simulation model.To meet the research needs,different plane and process layout schemes are optimized,and different yard storage strategies are evaluated.Qualitative and quantitative analysis methods are combined to verify the engineering value of the modeling method.This thesis has developed a coal terminal logistics system simulation model library based on multi-agent,which not only enriches the modeling methods of the coal terminal logistics system,but also provides a reference and decision basis for the planning design and operation management of the coal terminal logistics system well,it has strong academic significance and engineering value.