Dynamics of a Filippov epidemic model with limited hospital beds
A Filippov epidemic model is proposed to explore the impact of capacity and limited resources of public health system on the control of epidemic diseases. The number of infected cases is chosen as an index to represent a threshold policy, that is, the capacity dependent treatment policy is implement...
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AIMS Press
2018-05-01
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| Series: | Mathematical Biosciences and Engineering |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/mbe.2018033 |
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| author | Aili Wang Yanni Xiao Huaiping Zhu |
| author_facet | Aili Wang Yanni Xiao Huaiping Zhu |
| author_sort | Aili Wang |
| collection | DOAJ |
| description | A Filippov epidemic model is proposed to explore the impact of capacity and limited resources of public health system on the control of epidemic diseases. The number of infected cases is chosen as an index to represent a threshold policy, that is, the capacity dependent treatment policy is implemented when the case number exceeds a critical level, and constant treatment rate is adopted otherwise. The proposed Filippov model exhibits various local sliding bifurcations, including boundary focus or node bifurcation, boundary saddle bifurcation and boundary saddle-node bifurcation, and global sliding bifurcations, including grazing bifurcation and sliding homoclinic bifurcation to pseudo-saddle. The impact of some key parameters including the threshold level on disease control is examined by numerical analysis. Our results suggest that strengthening the basic medical conditions, i.e. increasing the minimum treatment ratio, or enlarging the input of medical resources, i.e. increasing HBPR (i.e. hospital bed-population ratio) as well as the possibility and level of maximum treatment ratio, can help to contain the case number at a relatively low level when the basic reproduction number $R_0 \gt 1$. If $R_0 \lt 1$, implementing these strategies can help in eradicating the disease although the disease cannot always be eradicated due to the occurring of backward bifurcation in the system. |
| format | Article |
| id | doaj-art-5eb1d868c4f244ba96282ed74008bbc6 |
| institution | Kabale University |
| issn | 1551-0018 |
| language | English |
| publishDate | 2018-05-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Mathematical Biosciences and Engineering |
| spelling | doaj-art-5eb1d868c4f244ba96282ed74008bbc62025-01-24T02:40:50ZengAIMS PressMathematical Biosciences and Engineering1551-00182018-05-0115373976410.3934/mbe.2018033Dynamics of a Filippov epidemic model with limited hospital bedsAili WangYanni XiaoHuaiping ZhuA Filippov epidemic model is proposed to explore the impact of capacity and limited resources of public health system on the control of epidemic diseases. The number of infected cases is chosen as an index to represent a threshold policy, that is, the capacity dependent treatment policy is implemented when the case number exceeds a critical level, and constant treatment rate is adopted otherwise. The proposed Filippov model exhibits various local sliding bifurcations, including boundary focus or node bifurcation, boundary saddle bifurcation and boundary saddle-node bifurcation, and global sliding bifurcations, including grazing bifurcation and sliding homoclinic bifurcation to pseudo-saddle. The impact of some key parameters including the threshold level on disease control is examined by numerical analysis. Our results suggest that strengthening the basic medical conditions, i.e. increasing the minimum treatment ratio, or enlarging the input of medical resources, i.e. increasing HBPR (i.e. hospital bed-population ratio) as well as the possibility and level of maximum treatment ratio, can help to contain the case number at a relatively low level when the basic reproduction number $R_0 \gt 1$. If $R_0 \lt 1$, implementing these strategies can help in eradicating the disease although the disease cannot always be eradicated due to the occurring of backward bifurcation in the system.https://www.aimspress.com/article/doi/10.3934/mbe.2018033filippov systemlimited hospital bedssliding mode dynamicspseudo-equilibriumthreshold policysliding bifurcation |
| spellingShingle | Aili Wang Yanni Xiao Huaiping Zhu Dynamics of a Filippov epidemic model with limited hospital beds Mathematical Biosciences and Engineering filippov system limited hospital beds sliding mode dynamics pseudo-equilibrium threshold policy sliding bifurcation |
| title | Dynamics of a Filippov epidemic model with limited hospital beds |
| title_full | Dynamics of a Filippov epidemic model with limited hospital beds |
| title_fullStr | Dynamics of a Filippov epidemic model with limited hospital beds |
| title_full_unstemmed | Dynamics of a Filippov epidemic model with limited hospital beds |
| title_short | Dynamics of a Filippov epidemic model with limited hospital beds |
| title_sort | dynamics of a filippov epidemic model with limited hospital beds |
| topic | filippov system limited hospital beds sliding mode dynamics pseudo-equilibrium threshold policy sliding bifurcation |
| url | https://www.aimspress.com/article/doi/10.3934/mbe.2018033 |
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