JOURNAL OF NATURAL RESOURCES ›› 2021, Vol. 36 ›› Issue (9): 2193-2204.

• Theoretical Exploration on Territorial Space Security •

### Optimization of network structural resilience of territory development zones based on propagation simulation

LIN Ying-zi(), PENG Chong(), WANG Bao-qiang

1. School of Architecture and Urban Planning, Huazhong University of Science and Technology, Urbanization Engineering Technology Research Center of Hubei Province, Wuhan 430074, China
• Received:2020-06-22 Revised:2020-11-06 Online:2021-09-28 Published:2021-09-15
• Contact: PENG Chong E-mail:linyingzi@hust.edu.cn;pengchong@hust.edu.cn

Abstract:

Propagation simulation is an important way to recognize the resilience of network structure from a dynamic perspective. Exploring the relationship between the difference in network structure and the state of network propagation is of great significance to the improvement of network structure resilience and the optimization of territory development space. This paper constructs four typical urban network models: nearest neighbor network, small world network, scale-free network and random network. Using complex network theory and SIS virus propagation model, MATLAB and Gephi are used to simulate infectious diseases, and the four types of networks are analyzed. The variation characteristics of infection quantity and infection time under the difference of network shape, node scale and degree value, and the influence mechanism are discussed. The results showed that: (1) From the perspective of overall characteristics, the difference in network structure affects the strength of network propagation. The heterogeneity value distribution, highly local clustering, and short path length of irregular network will expand the scale of infection and shorten the time of infection. (2) From the perspective of decomposition characteristics, scale is not the core factor affecting network communication. High degree of urban network with power law distribution is the risk of regional and urban suppression of negative transmission. (3) From the perspective of spatio-temporal characteristics, heterogeneous network and regular network have the dual characteristics of robustness and fragility. The advantages of heterogeneous network in peacetime and the advantages of regular network in epidemic time should be fully developed through network switching. Based on this, the resilience optimization strategy of land development space network structure is proposed from the regional and urban levels.