计算机与现代化

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一类时滞网络病毒传播模型的Hopf分支

  

  1. 1.武汉市妇女儿童医疗保健中心信息科,湖北武汉430014;2.湖北医药学院网络中心,湖北十堰442000
  • 收稿日期:2016-02-17 出版日期:2016-11-15 发布日期:2016-11-23
  • 作者简介:宋磊(1976-),男,湖北武汉人,武汉市妇女儿童医疗保健中心信息科工程师,本科,研究方向:网络信息安全。
  • 基金资助:
    湖北医药学院研究生启动基金资助项目(2011QDZR-24)

Hopf Bifurcation of Delayed Computer Virus Propagation Model

  1. 1. Information Department of Wuhan Women and Children’s Health Center, Wuhan 430014, China; 
    2.Network Center of Hubei University of Medicine, Shiyan 442000, China
  • Received:2016-02-17 Online:2016-11-15 Published:2016-11-23

摘要: 考虑到杀毒软件查杀病毒需要一定的时间周期,以及免疫主机对网络病毒的临时免疫力,本文基于SIQR网络病毒传播模型提出一类时滞SIQRS网络病毒传播模型。以杀毒软件查杀病毒需要一定的时间周期时滞为分支参数,通过分析相应特征方程根的分布,得到模型有病毒平衡点局部渐近稳定和产生Hopf分支的充分条件。给出一个仿真示例,对理论分析结果的正确性进行了验证。

关键词: 时滞, Hopf分支, SIQRS模型, 稳定性

Abstract: Considering that anti-virus software needs a period to clean viruses and there is a temporary immunity for the recovered computers, a delayed computer virus propagation model based on the SIQR computer virus propagation model is proposed. Sufficient conditions for local stability of the positive equilibrium and occurrence of a Hopf bifurcation are obtained by regarding the delay as a bifurcation parameter and analyzing the distribution of the roots of the associated characteristic equation. Finally, a numerical simulation example is carried out to support the theoretical predictions. 

Key words:  delay, Hopf bifurcation, SIQRS model, stability

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