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Q. M.</a>; <a href="/authors/furati.khaled-m" title="Author Profile">Furati, K. M.</a></div> <h2 class="title"> <strong>Identification and prediction of time-varying parameters of COVID-19 model: a data-driven deep learning approach.</strong> <i>(English)</i> <a class="label nowrap" href="/1483.92138">Zbl 1483.92138</a> </h2> <div class="source"> <a href="/serials/1585" title="Journal Profile">Int. J. Comput. Math.</a> <a href="/?q=in%3A477069" title="Articles in this Issue">98, No. 8, 1617-1632 (2021)</a>. </div> <div class="abstract">Summary: Data-driven deep learning provides efficient algorithms for parameter identification of epidemiology models. Unlike the constant parameters, the complexity of identifying time-varying parameters is largely increased. In this paper, a variant of physics-informed neural network is adopted to identify the time-varying parameters of the susceptible-infectious-recovered-deceased model for the spread of COVID-19 by fitting daily reported cases. The learned parameters are verified by utilizing an ordinary differential equation solver to compute the corresponding solutions of this compartmental model. The effective reproduction number based on these parameters is calculated. Long short-term memory neural network is employed to predict the future weekly time-varying parameters. The numerical simulations demonstrate that PINN combined with LSTM yields accurate and effective results.</div> <div class="clear"></div> <br> <div class="citations"><div class="clear"><a href="/?q=rf%3A7476635">Cited in <strong>5</strong> Documents</a></div></div> <div class="classification"> <h3>MSC:</h3> <table><tr> <td> <a class="mono" href="/classification/?q=cc%3A92D30" title="MSC2020">92D30</a> </td> <td class="space"> Epidemiology </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A68T07" title="MSC2020">68T07</a> </td> <td class="space"> Artificial neural networks and deep learning </td> </tr></table> </div><div class="keywords"> <h3>Keywords:</h3><a href="/?q=ut%3APINN">PINN</a>; <a href="/?q=ut%3ALSTM">LSTM</a>; <a href="/?q=ut%3ASIRD">SIRD</a>; <a href="/?q=ut%3ACOVID-19">COVID-19</a>; <a href="/?q=ut%3Adeep+neural+network">deep neural network</a></div> <div class="software"> <h3>Software:</h3><a href="/software/32456">DeepXDE</a>; <a href="/software/22205">Adam</a></div> <!-- Modal used to show zbmath metadata in different output formats--> <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;"> <!-- alert for connection errors etc --> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function"> <!-- Button trigger metadata modal --> <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1483.92138" data-ciurl="/ci/07476635" data-biburl="/bibtex/07476635.bib" data-amsurl="/amsrefs/07476635.bib" data-xmlurl="/xml/07476635.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07476635.pdf" title="Zbl 1483.92138 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1080/00207160.2021.1929942" aria-label="DOI for “Identification and prediction of time-varying parameters of COVID-19 model: a data-driven deep learning approach”" title="10.1080/00207160.2021.1929942">DOI</a> <a class="btn btn-default btn-xs" type="button" href="https://arxiv.org/abs/2103.09949"title="Note: arXiv document may differ from published version">arXiv</a> </div> <div class="sfx" style="float: right;"> </div> </div> <div class="references"> <h3>References:</h3> <table><tr> <td>[1]</td> <td class="space">Amari, S. I., Backpropagation and stochastic gradient descent method, Neurocomputing, 5, 185-196 (1993) &middot; <a href="/0782.68094" class="nowrap">Zbl 0782.68094</a></td> </tr><tr> <td>[2]</td> <td class="space">Carcione, J.M., Santos, J.E., Bagaini, C., and Ba, J., A simulation of a COVID-19 epidemic based on a deterministic SEIR model, preprint (2020). Available at arXiv:2004.03575.</td> </tr><tr> <td>[3]</td> <td class="space">Chen, Y. C.; Lu, P. E.; Chang, C. S.; Liu, T. H., A time-dependent SIR model for COVID-19 with undetectable infected persons, IEEE Trans. Netw. Sci. Eng., 7, 3279-3294 (2020)</td> </tr><tr> <td>[4]</td> <td class="space">Cybenko, G., Approximation by superpositions of a sigmoidal function, Math. Control Signals Syst, 2, 303-314 (1989) &middot; <a href="/0679.94019" class="nowrap">Zbl 0679.94019</a></td> </tr><tr> <td>[5]</td> <td class="space">Fan, H.; Jiang, M.; Xu, L.; Zhu, H.; Cheng, J.; Jiang, J., Comparison of long short term memory networks and the hydrological model in runoff simulation, Water, 12, 175 (2020)</td> </tr><tr> <td>[6]</td> <td class="space">Ferrari, L., Gerardi, G., Manzi, G., Micheletti, A., Nicolussi, F., and Salini, S., Modelling provincial COVID-19 epidemic data in Italy using an adjusted time-dependent SIRD model, preprint (2020). Available at arXiv:2005.12170.</td> </tr><tr> <td>[7]</td> <td class="space">Goodfellow, I.; Bengio, Y.; Courville, A., Deep Learning (2016), Cambridge: MIT Press &middot; <a href="/1373.68009" class="nowrap">Zbl 1373.68009</a></td> </tr><tr> <td>[8]</td> <td class="space">Gray, D. L.; Michel, A. N., A training algorithm for binary feedforward neural networks, IEEE Trans. Neural Netw., 3, 176-194 (1992)</td> </tr><tr> <td>[9]</td> <td class="space">T.A.M. Group, The COVID tracking project, preprint (2020). Available at https://covidtracking.com/data/download.</td> </tr><tr> <td>[10]</td> <td class="space">Guanghong, D.; Chang, L.; Jianqiu, G.; Ling, W.; Ke, C.; Di, Z., SARS epidemical forecast research in mathematical model, Chin. Sci. Bull., 49, 2332-2338 (2004) &middot; <a href="/1072.92042" class="nowrap">Zbl 1072.92042</a></td> </tr><tr> <td>[11]</td> <td class="space">Hatchett, R. J.; Mecher, C. E.; Lipsitch, M., Public health interventions and epidemic intensity during the 1918 influenza pandemic, Proc. Natl. Acad. Sci., 104, 7582-7587 (2007)</td> </tr><tr> <td>[12]</td> <td class="space">Hochreiter, S.; Schmidhuber, J., Long short-term memory, Neural Comput., 9, 1735-1780 (1997)</td> </tr><tr> <td>[13]</td> <td class="space">Jo, H., Son, H., Jung, S.Y., and Hwang, H.J., Analysis of COVID-19 spread in South Korea using the SIR model with time-dependent parameters and deep learning, preprint (2020). Available at medRxiv.</td> </tr><tr> <td>[14]</td> <td class="space">Kergassner, A., Burkhardt, C., Lippold, D., Nistler, S., Kergassner, M., Steinmann, P., Budday, D., and Budday, S., Meso-scale modeling of COVID-19 spatio-temporal outbreak dynamics in Germany, preprint (2020). Available at medRxiv. &middot; <a href="/1465.92059" class="nowrap">Zbl 1465.92059</a></td> </tr><tr> <td>[15]</td> <td class="space">Kermack, W. O.; McKendrick, A. G., A contribution to the mathematical theory of epidemics, Proc. R. Soc. Lond. A, 115, 700-721 (1927) &middot; <a href="/53.0517.01" class="nowrap">JFM 53.0517.01</a></td> </tr><tr> <td>[16]</td> <td class="space">Kingma, D.P. and Ba, J., Adam: A method for stochastic optimization, preprint (2017). Available at arXiv:1412.6980v9.</td> </tr><tr> <td>[17]</td> <td class="space">Lin, Q.; Zhao, S.; Gao, D.; Lou, Y.; Yang, S.; Musa, S. S.; Wang, M. H.; Cai, Y.; Wang, W.; Yang, L.; He, D., A conceptual model for the outbreak of coronavirus disease 2019 (COVID-19) in Wuhan, China with individual reaction and governmental action, Int. J. Infect. Dis., 93, 211-216 (2020)</td> </tr><tr> <td>[18]</td> <td class="space">Liu, Z.; Magal, P.; Seydi, O.; Webb, G., Predicting the cumulative number of cases for the COVID-19 epidemic in China from early data, Math. Biosci. Eng., 17, 3040-3051 (2020) &middot; <a href="/1467.92215" class="nowrap">Zbl 1467.92215</a></td> </tr><tr> <td>[19]</td> <td class="space">Lu, L., Meng, X., Mao, Z., and Karniadakis, G.E., DeepXDE: A deep learning library for solving differential equations, preprint (2020). Available at arXiv:1907.04502v2. &middot; <a href="/1459.65002" class="nowrap">Zbl 1459.65002</a></td> </tr><tr> <td>[20]</td> <td class="space">Magri, L. and Doan, N.A.K., First-principles machine learning modelling of COVID-19, preprint (2020). Available at arXiv:2004.09478.</td> </tr><tr> <td>[21]</td> <td class="space">Raissi, M.; Ramezani, N.; Seshaiyer, P., On parameter estimation approaches for predicting disease transmission through optimization, deep learning and statistical inference methods, Lett. Biomath., 6, 1-26 (2019)</td> </tr><tr> <td>[22]</td> <td class="space">Raissi, M.; Perdikaris, P.; Karniadakis, G. E., Physics-informed neural networks: A deep learning framework for solving forward and inverse problems involving nonlinear partial differential equations, J. Comput. Phys., 378, 686-707 (2019) &middot; <a href="/1415.68175" class="nowrap">Zbl 1415.68175</a></td> </tr><tr> <td>[23]</td> <td class="space">Rafiq, M.; Macías-Díaz, J.; Raza, A.; Ahmed, N., Design of a nonlinear model for the propagation of COVID-19 and its efficient nonstandard computational implementation, Appl. Math. Model., 89, 1835-1846 (2021) &middot; <a href="/1481.92158" class="nowrap">Zbl 1481.92158</a></td> </tr><tr> <td>[24]</td> <td class="space">Ridenhour, B.; Kowalik, J. M.; Shay, D. K., Unraveling \(####\): Considerations for public health applications, Am. J. Public Health, 108, S445-S454 (2018)</td> </tr><tr> <td>[25]</td> <td class="space">Shahid, F.; Zameer, A.; Muneeb, M., Predictions for COVID-19 with deep learning models of LSTM, GRU and Bi-LSTM, Chaos Solitons Fractals, 140 (2020)</td> </tr><tr> <td>[26]</td> <td class="space">Shi, Y., Stochastic dynamic model of SARS spreading, Chin. Sci. Bull., 48, 1287-1292 (2003)</td> </tr><tr> <td>[27]</td> <td class="space">Shin, Y., Darbon, J., and Karniadakis, G.E., On the convergence of physics informed neural networks for linear second-order elliptic and parabolic type pdes, preprint (2020). Available at arXiv:2004.01806. &middot; <a href="/1473.65349" class="nowrap">Zbl 1473.65349</a></td> </tr><tr> <td>[28]</td> <td class="space">Sowole, S. O.; Sangare, D.; Ibrahim, A. A.; Paul, I. A., On the existence, uniqueness, stability of solution and numerical simulations of a mathematical model for measles disease, Int. J. Adv. Math., 4, 84-111 (2019)</td> </tr><tr> <td>[29]</td> <td class="space">van den Driessche, P., Reproduction numbers of infectious disease models, Infect. Dis. Model., 2, 288-303 (2017)</td> </tr><tr> <td>[30]</td> <td class="space">Wang, J.; McMichael, A. J.; Meng, B.; Becker, N. G.; Han, W.; Glass, K.; Wu, J.; Liu, X.; Liu, J.; Li, X.; Zheng, X., Spatial dynamics of an epidemic of severe acute respiratory syndrome in an urban area, Bull. World Health Organ., 84, 965-968 (2006)</td> </tr><tr> <td>[31]</td> <td class="space">Wang, H.; Wang, Z.; Dong, Y.; Chang, R.; Xu, C.; Yu, X.; Zhang, S.; Tsamlag, L.; Shang, M.; Huang, J.; Wang, Y., Phase-adjusted estimation of the number of coronavirus disease 2019 cases in Wuhan, China, Cell. Discov., 6, 1-8 (2020)</td> </tr><tr> <td>[32]</td> <td class="space">World Health Organizaiton, Rolling updates on coronavirus disease (COVID-19), preprint (2020). Available at https://www.who.int/emergencies/diseases/novel-coronavirus-2019/events-as-they-happen (accessed 31 July 2020).</td> </tr><tr> <td>[33]</td> <td class="space">Worldometers, COVID-19 coronavirus pandemic, preprint (2020). Available at https://www.worldometers.info/coronavirus/?#countries.</td> </tr><tr> <td>[34]</td> <td class="space">Yang, Z.; Zeng, Z.; Wang, K.; Wong, S.-S.; Liang, W.; Zanin, M.; Liu, P.; Cao, X.; Gao, Z.; Mai, Z.; Liang, J.; Liu, X.; Li, S.; Li, Y.; Ye, F.; Guan, W.; Yang, Y.; Li, F.; Luo, S.; Xie, Y.; Liu, B.; Wang, Z.; Zhang, S.; Wang, Y.; Zhong, N.; He, J., Modified SEIR and AI prediction of the epidemics trend of COVID-19 in China under public health interventions, J. Thorac. Dis., 12, 165-174 (2020)</td> </tr><tr> <td>[35]</td> <td class="space">Zeroual, A.; Harrou, F.; Dairi, A.; Sun, Y., Deep learning methods for forecasting COVID-19 time-series data: A comparative study, Chaos Solitons Fractals, 140 (2020)</td> </tr></table> <div class="reference_disclaimer"> This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH&nbsp;Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching. </div> </div></article> </div></div> </div> </div> <div class="clearfix"></div> </div> </div> <div id="foot"><div class="copyright"> &copy; 2025 <a target="fiz" href="https://www.fiz-karlsruhe.de/en">FIZ Karlsruhe GmbH</a> <a href="/privacy-policy/">Privacy Policy</a> <a href="/legal-notices/">Legal Notices</a> <a href="/terms-conditions/">Terms &amp; Conditions</a> <div class="info"> <ul class="nav"> <li class="mastodon"> <a href="https://mathstodon.xyz/@zbMATH" target="_blank" class="no-new-tab-icon"> <img src="/static/mastodon.png" title="zbMATH at Mathstodon (opens in new tab)" alt="Mastodon logo"> </a> </li> </ul> </div> </div> <div class="clearfix" style="height: 0px;"></div> </div> </div> <script src="https://static.zbmath.org/contrib/jquery/1.9.1/jquery.min.js"></script> <script src="https://static.zbmath.org/contrib/jquery-caret/1.5.2/jquery.caret.min.js"></script> <script src="/static/js/jquery-ui-1.10.1.custom.min.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap/v3.3.7zb1/js/bootstrap.min.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap-lightbox/v0.7.0/bootstrap-lightbox.min.js"></script> <script src="https://static.zbmath.org/contrib/retina/unknown/retina.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap-select/v1.13.14/js/bootstrap-select.min.js"></script> <script> var SCRIPT_ROOT = ""; </script> <script src="/static/scripts.js?v=20240926"> </script> <script src="https://static.zbmath.org/contrib/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ "HTML-CSS": { preferredFont: "TeX", availableFonts: [ "STIX", "TeX" ], linebreaks: { automatic: true }, EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50) }, tex2jax: { processEscapes: true, ignoreClass: "tex2jax_ignore|dno" }, TeX: { Macros: { Aut: "\\operatorname{Aut}", Hom: "\\operatorname{Hom}" }, noUndefined: { attributes: { mathcolor: "#039", //"red", mathbackground: "white", //"#FFEEEE", mathsize: "90%" } } }, messageStyle: "none" }); </script> <script type="text/javascript"> $(document).ready(function() { $("#MathInput").stop(true, true).keyup(function() { $.ajax({ url: "/mwsq/", type: "POST", data: { query : $("#MathInput").val() }, dataType: "text" }) .done(function(xml) { $("#MathPreview").html(xml); $(window).resize(); }); }); var press = jQuery.Event("keyup"); press.ctrlKey = false; press.which = 40; $("#MathInput").trigger(press); }); </script> <div id="new_tab_icon" style="display: none">&nbsp;<span class="glyphicon glyphicon-new-window" aria-hidden="true"></span><span class="sr-only">(opens in new tab)</span></div> </body> </html>

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