关键词: 供应商网络, 有向加权网络, 脆弱性评价, 风险传播, 供应链

Abstract: To research the risk evolution mechanism of multi-level supplier network,the supplier network was transformed into a directed weighted network.On this basis,the node vulnerability was taken as an important factor to evaluate itself cure rate and the edge weights among nodes were also taken as an important factor to influence the propagation rate,so as to improve the traditional epidemic model to make it more suitable for the network of suppliers.The risk transmission rate and itself cure rate of enterprises were analyzed by simulation,and the key points of risk management would be find out to adjust the network structure,so that the damage of the network risk could be reduced effectively.

Key words: supplier networks, directed weighted networks, vulnerability assessment, risk propagation, supply chains