Complex network propagation effect based on SIRS model and research on the necessity of smart city credit system construction

In this paper, we first consider one of the interconnected enterprises in the economy as nodes in a complex network. Based on the SIRS risk contagion model, we describe the transmission process of credit risk between enterprises after the bursting of the stock market with the contagion process, and clarify their diffusion mechanism and effect. The propagation effect of SIRS model in complex network is simulated and analyzed. The results show that when the risk contagion intensity exceeds a certain threshold and the proportion of infected enterprises in the economy exceeds a certain level, it will inevitably lead to the insecurity of the whole economy. In most cases, the policy intervention of the regulatory authorities is necessary. If the crisis is allowed to infect, it is likely to induce the financial risk of the whole system; The construction of smart city credit system can use big data to solve the problem of information island, promote the co construction and sharing of data resources, assist the regulators to effectively prevent and block the transmission of credit risk, and nip the risk in the bud, so as to maintain social stability and economic security.