基于复杂网络理论的乳制品供应链动力学行为及鲁棒性研究
[Abstract]:With the improvement of living standard and purchasing power, the demand for dairy products is increasing. However, in recent years, the quality of dairy products has often seriously damaged the interests of consumers, prompting more attention focused on the safety and reliability of dairy products. The risk of dairy supply chain is an important factor that leads to quality problems in dairy products. Strengthening the supply chain management of dairy products can effectively prevent the occurrence of quality problems. Therefore, it is of great practical significance to study the complex network risk propagation and stability of dairy supply chain. The main research contents of this paper are as follows: firstly, the classic supply chain network is analyzed, and the model and characteristics of dairy supply chain are introduced, combined with the common structure of supply chain and the structural characteristics of dairy supply chain. The evolutionary model of dairy supply chain complex network is established, and the dynamic evolution process of dairy product supply chain complex network with time is obtained by Matlab simulation. The degree distribution of dairy product supply chain complex network is solved by evolutionary model algorithm. Cluster coefficient and average path length, combined with Zhejiang Beingmei Company dairy supply chain empirical verification. The simulation results show that the evolution of dairy supply chain complex network which can add edge, add point, remove edge at any time has smaller average path length, larger clustering coefficient, and the distribution of network degree tends to power law distribution. It has the relevant characteristics of "scale-free" network. In the dairy supply chain, the key node enterprises which are closely connected with the upstream and downstream are more likely to obtain new connections, and as the main focus of the dairy supply chain complex network, the key node enterprises can directly affect the overall evolution of the network. Secondly, the complex network dynamics behavior of dairy supply chain is studied, and the risk factors in each link of dairy supply chain are analyzed, and the risk factors are abstracted into a certain level node infection as a risk node. Considering the transfer of risk between the order and the order of the model, the risk diffusion dynamics model of the dairy supply chain complex network is established, and the probability expression that every node infection becomes the risk node is obtained. With the change of the risk diffusion coefficient and the minimum number of infected nodes, the change of the probability of the fourth order network becoming the risk node is analyzed, and the characteristics of the complex network structure of the dairy supply chain are deepened from the perspective of the hierarchy. Finally, the robustness of dairy supply chain complex network is studied, and a robust analysis algorithm of dairy supply chain complex network is proposed. This paper analyzes the robustness of dairy supply chain complex network under random attack and deliberate attack, studies the relationship between the network failure and the number of attack nodes, and then puts forward the countermeasures to prevent the dairy supply chain complex network failure. Finally, combining with the empirical calculation of Zhejiang Beingmei Company's dairy supply chain, the characteristics of network robustness are analyzed to provide suggestions for ensuring the safety and stability of dairy supply chain, and then to ensure the quality of dairy products.
【学位授予单位】:北京交通大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:O157.5
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