Multi-level Supplier Selection And Simulation Study Of Network Structure Risk Propagation

With the rapid development of social economy,the degree of complexity of supply chain is increasing,on the stability of the supply chain network has become an important part of supply chain management.The supplier network is focused on the local network production manufacturers,and subsystem belongs to the supply chain network.Because of complex supply chain network and a large scale,it is difficult and the risk analysis content analysis of macro,so this article mainly studies the local sub-network provider network of supply chain network.The supplier network has similar characteristics with the supply chain network,and it is also with the development of complexity of economic increasing,therefore it should be from a global perspective to study the complexity of the supplier network.This paper applies the theory of complex networks and establish a multi-vendor weighted network,and applies the relevant theory of the supplier network features analysis,on the basis of supplier selection and the establishment of network structure of scientific supplier network more stable.At the same time,maintain the stability of the supplier network not only considers the adjustment of network structure,but also to consider the relationship between nodes in the network of suppliers,fragile and spread mechanism between the connected node weights improved virus propagation model and in order to study on the supplier risk through the application of network nodes,to find out the impact of risk communication The key factors to develop more reasonable and scientific measures to deal with risks.By determining the supplier partner selection and risk coping strategies two and network relations from the perspective of network structure on the stability of supplier network research,and to improve its stability put forward scientific and effective strategies.The thesis consists of seven chapters,the first chapter is the introduction mainly on the background and significance of the introduction;the second chapter introduces the related theories;the third chapter is the supplier of the network into a weighted network;the fourth chapter is the problem of modeling and solving methods of multilevel suppliers;the fifth chapter is the theoretical research on the evolution mechanism of risk communication network of suppliers based on the structure;the sixth chapter is case analysis;the seventh chapter is summary and outlook.Firstly,this paper sort out the related theory content the relevant theories of supply chain risk,supply chain theory,the complexity of the complex network and the risk communication;secondly,the supplier network will be transformed into the weighted network based on the complex network theory related to establish a multi-supplier selection model;thirdly,the weights of edges between nodes of vulnerability and connected the spread of the virus into the node model,analysis the risk spreading mechanism;finally,the paper summarizes the research and Prospect of this study in the perspective of complex network,to achieve the global optimum of supplier network target,supplier selection model construction,find out the best supplier Combination optimization of supplier network structure;in addition,the spread of the virus vulnerability and edge weight improved general model using complex network nodes,the network supplier risk communication mechanism analysis,find out the key factors affecting the risk of transmission,relevant measures related to deal with the risk.The aim is to establish the optimal network structure and the development of risk defense strategies to enhance the stability and robustness of the network of suppliers.