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浙江大学学报(理学版)  2022, Vol. 49 Issue (2): 159-169    DOI: 10.3785/j.issn.1008-9497.2022.02.004
数学与计算机科学     
一类具有媒体效应和追踪隔离的SIQR时滞传染病模型
张钰倩(),张太雷(),侯雯珊,宋学力
长安大学 理学院,陕西 西安 710064
A delayed SIQR epidemic model with media effect and tracking quarantine
Yuqian ZHANG(),Tailei ZHANG(),Wenshan HOU,Xueli SONG
School of Science,Chang'an University,Xi'an 710064,China
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摘要:

建立了一类具有媒体效应和追踪隔离的SIQR时滞传染病模型,给出了模型的基本再生数R0,并从稳定性、持久性和分支角度对该模型进行了理论分析和数值模拟。研究结果表明,由媒体报道产生的时滞τ在各影响因子的临界值处出现Hopf分支。当τ固定时,随着媒体的广泛报道,易感者对疾病信息认识的偏差程度δ不断增加,模型由周期性振荡转为平衡;随着有效接触率最大削减作用β0β00的不断增加,模型又由平衡状态转为周期性振荡。还研究了δβ0β00以及被追踪隔离者相关信息的媒体报道准确率σ对传染病发展的影响。结果表明,媒体对传染病信息的广泛报道以及提高报道信息的准确率可降低疾病传播,有利于控制传染病。

关键词: 媒体报道追踪隔离SIQR时滞模型稳定性Hopf分支    
Abstract:

In this paper, a delayed SIQR epidemic model with media effect and tracking quarantine is established, the basic reproduction number R0 of the model is given. The model is analyzed theoretically and simulated numerically from the perspective of stability, persistence and bifurcation. The results show that Hopf bifurcations occur when the delay τ generated by media reports passes through a sequence of critical values. When τ is fixed, As the degree of deviation δ of susceptible persons' understanding of disease information under media reports increases continuously, the model will change from periodic oscillation to equilibrium point. With the increase of β0 and β00, the maximum reduction effect of media reports on the effective contact rate, the model will change from equilibrium to periodic oscillation. Finally, the influence of different δ,β0,β00 and δ which denotes the accuracy of media reports on the relevant information of the quarantined persons on the development of infectious diseases is studied. The results suggest that it is beneficial for the media to widely report the information of infectious diseases and improve the information accuracy so as to reduce the spread of infectious diseases and effectively control the outbreak of infectious diseases.

Key words: media coverage    tracking isolation    a delayed SIQR epidemic model    stability    Hopf bifurcation
收稿日期: 2021-06-08 出版日期: 2022-03-22
CLC:  O 175  
基金资助: 陕西省自然科学基础研究计划项目(2022JM-023)
通讯作者: 张太雷     E-mail: yuqianzhang2020@126.com;tlzhang@chd.edu.cn
作者简介: 张钰倩(1996—),ORCID:https://orcid.org/0000-0002-1606-467X,女,硕士研究生,主要从事生物数学研究,E-mail:yuqianzhang2020@126.com.
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引用本文:

张钰倩,张太雷,侯雯珊,宋学力. 一类具有媒体效应和追踪隔离的SIQR时滞传染病模型[J]. 浙江大学学报(理学版), 2022, 49(2): 159-169.

Yuqian ZHANG,Tailei ZHANG,Wenshan HOU,Xueli SONG. A delayed SIQR epidemic model with media effect and tracking quarantine. Journal of Zhejiang University (Science Edition), 2022, 49(2): 159-169.

链接本文:

https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2022.02.004        https://www.zjujournals.com/sci/CN/Y2022/V49/I2/159

图1  模型1仓室示意
图2  当τ=10.5时地方病平衡点E*=(1.683 0,0.210 8)局部渐近稳定
图3  当τ=10.5时E*局部渐近稳定的相位图
图4  当τ=12.5时式(2)出现分支周期解
图5  当τ=12.5时E*的相位图
图6  式(2)中易感者和感染者相对于τ的分支图
图7  式(2)中易感者和感染者相对于δ的分支图
图8  式(2)中易感者和感染者相对于β0和β00的分支图
图9  参数β0对I(t)的影响
图10  参数β00对I(t)的影响
图11  参数δ对I(t)的影响
图12  参数σ对I(t)的影响
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