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Physics-informed neural networks for multiscale hyperbolic models for the spatial spread of infectious diseases

Abstract

When investigating epidemic dynamics, the model parameters, necessary for understanding the phenomenon and to simulate forecast scenarios, require a delicate calibration phase, often made even more challenging by the scarcity and uncertainty of observed data reported by official sources.In this context, we proposed to employ physics informed neural networks (PINNs) to infer parameters for epidemic models. Yet, in many circumstances, the spatial propagation of an infectious disease is characterized by movements of individuals at different scales governed by multiscale differential models. Therefore, a direct application of PINNs generally leads to poor results due to the multiscale nature of the differential model in the loss function of the neural network. To allow the neural network to operate uniformly with respect to the small scales we must guarantee the asymptotic preservation (AP) property in the loss function. To this aim, we introduce a new class of AP neural networks (AP-PINNs) for multiscale hyperbolic transport models of epidemic spread. A series of numerical tests confirm the validity of the proposed approach.


Biography
Dr. Xueyu Zhu is an Assistant Professor with the Department of Mathematics, University of Iowa. He is also affiliated with an interdisciplinary Ph.D. Program in applied mathematical and computational sciences. He received the Ph.D. degree in applied mathematics from Brown University, Providence, RI, USA, in 2013. His research interests include Numerical analysis, scientific computation, uncertainty quantification, model reduction, high-performance computing, and scientific machine learning.