Research on cascading failure of complex system and its virus propation

The research of the cascading failure and the spread of the disease belong to two separate fields. However, in practice, there are many mutual effects between two processes each other. This paper first introduces some basic concepts of complex networks, and analyzes the application of cascading failure model and several typical virus transmission models. Then, based on a spreading model, the interaction of the models between the virus propagation and the cascading failure is established. Furthermore, the dynamic process of the node state and their interaction is analyzed for the interaction model. According to the dynamic process, the qualitative analysis and quantitative analysis are both carried out. Finally, the proportion on the different states of the nodes in the network is simulated and analyzed based on the equilibrium of the virus spreading when the cascading failure is over. The effectiveness and practicability of the model is verified by comparing the simulation value with the theoretical value. The work provides a guideline for designing and improving the security of the network system in real life.