文章基本信息

标题：A time-delay COVID-19 propagation model considering supply chain transmission and hierarchical quarantine rate
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作者：Fangfang Yang ; Zizhen Zhang
期刊名称：Advances in Difference Equations
印刷版ISSN：1687-1839
电子版ISSN：1687-1847
出版年度：2021
卷号：2021
期号：1
页码：1
DOI：10.1186/s13662-021-03342-8
出版社：Hindawi Publishing Corporation
摘要：In this manuscript, we investigate a novel Susceptible–Exposed–Infected–Quarantined–Recovered (SEIQR) COVID-19 propagation model with two delays, and we also consider supply chain transmission and hierarchical quarantine rate in this model. Firstly, we analyze the existence of an equilibrium, including a virus-free equilibrium and a virus-existence equilibrium. Then local stability and the occurrence of Hopf bifurcation have been researched by thinking of time delay as the bifurcation parameter. Besides, we calculate direction and stability of the Hopf bifurcation. Finally, we carry out some numerical simulations to prove the validity of theoretical results.
关键词：Delays ; Supply chain transmission ; Hierachical quarantine rate ; Bifurcation ; Stability ; SEIQR COVID-19 virus propagation model