基于病毒傳播的網(wǎng)絡(luò)結(jié)構(gòu)優(yōu)化研究
[Abstract]:Virus transmission in the network is an important research direction in the complex network propagation dynamics. How to better suppress the virus transmission in the network has always been an important subject for scholars to explore. To study the evolutionary relationship between network structure and virus transmission is helpful to study the determinants of virus transmission inhibition at the network structure level. Based on the analysis of network structure measurement parameters, this paper designs a reasonable network structure optimization strategy, so as to effectively suppress the spread of virus in the network. This contribution is summarized as follows: 1. According to the inverse relation between the spectral radius of the network and the threshold of virus transmission, this paper improves the threshold of virus transmission by optimizing the network structure to reduce the spectral radius. According to the relationship between spectral radius and linearity correlation coefficient of the network, this paper designs the network heterogamy reconnection strategy to improve the virus transmission threshold of the network, at the same time, the real network is taken as the optimization object. The classical viral transmission model-SIS model is applied to verify the effectiveness of the heterozygote strategy proposed in this paper in the suppression of viral transmission. The simulation results show that the heterojunction strategy can reduce the spectral radius of the network and raise the propagation threshold, which has a good inhibitory effect on virus transmission. 2. According to the influence of network clustering coefficient on virus transmission, while considering the relationship between spectral radius and network closed loop, the edge rewriting strategy is designed to optimize the network structure to achieve the balance between increasing network clustering coefficient and increasing virus transmission threshold. In order to suppress the spread of virus in the network. At the same time, the classical virus propagation model was used to verify the effectiveness of the optimization strategy to suppress the virus transmission. The simulation results show that the network clustering coefficient can be improved and the spectral radius of the network can be reduced by using the disconnection and reconnection optimization strategy proposed in this chapter, which has a good inhibitory effect on virus propagation. 3. Considering the influence of modularity and spectral radius on virus propagation, and the characteristics of modularity in community networks, this paper designs an edge rewriting strategy to optimize network structure to achieve the purpose of increasing network modularity and raising virus transmission threshold. Thus effectively inhibit the spread of virus in the network. At the same time, the network before and after optimization is compared in the virus transmission model-SIS model. The experimental results show that the network optimized by the edge rewriting strategy designed in this paper can effectively suppress the transmission of the virus.
【學(xué)位授予單位】:南京郵電大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TP309.5;O157.5
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