A tutorial on inverse problems for anomalous diffusion processes

B Jin, W Rundell - Inverse problems, 2015 - iopscience.iop.org
Over the last two decades, anomalous diffusion processes in which the mean squares
variance grows slower or faster than that in a Gaussian process have found many …

fPINNs: Fractional physics-informed neural networks

G Pang, L Lu, GE Karniadakis - SIAM Journal on Scientific Computing, 2019 - SIAM
Physics-informed neural networks (PINNs), introduced in M. Raissi, P. Perdikaris, and G.
Karniadakis, J. Comput. Phys., 378 (2019), pp. 686--707, are effective in solving integer …

An analysis of the L1 scheme for the subdiffusion equation with nonsmooth data

B Jin, R Lazarov, Z Zhou - IMA Journal of Numerical Analysis, 2016 - academic.oup.com
The subdiffusion equation with a Caputo fractional derivative of order in time arises in a wide
variety of practical applications, and it is often adopted to model anomalous subdiffusion …

[HTML][HTML] The Galerkin finite element method for a multi-term time-fractional diffusion equation

B Jin, R Lazarov, Y Liu, Z Zhou - Journal of Computational Physics, 2015 - Elsevier
We consider the initial/boundary value problem for a diffusion equation involving multiple
time-fractional derivatives on a bounded convex polyhedral domain. We analyze a space …

Two fully discrete schemes for fractional diffusion and diffusion-wave equations with nonsmooth data

B Jin, R Lazarov, Z Zhou - SIAM journal on scientific computing, 2016 - SIAM
We consider initial/boundary value problems for the subdiffusion and diffusion-wave
equations involving a Caputo fractional derivative in time. We develop two fully discrete …

Simultaneous inversion for the space-dependent diffusion coefficient and the fractional order in the time-fractional diffusion equation

G Li, D Zhang, X Jia, M Yamamoto - Inverse Problems, 2013 - iopscience.iop.org
This paper deals with an inverse problem of simultaneously identifying the space-dependent
diffusion coefficient and the fractional order in the 1D time-fractional diffusion equation with …

A modified quasi-boundary value method for an inverse source problem of the time-fractional diffusion equation

T Wei, J Wang - Applied Numerical Mathematics, 2014 - Elsevier
In this paper, we consider an inverse source problem for a time-fractional diffusion equation
with variable coefficients in a general bounded domain. That is to determine a space …

Error analysis of semidiscrete finite element methods for inhomogeneous time-fractional diffusion

B Jin, R Lazarov, J Pasciak… - IMA Journal of Numerical …, 2015 - academic.oup.com
We consider the initial-boundary value problem for an inhomogeneous time-fractional
diffusion equation with a homogeneous Dirichlet boundary condition, a vanishing initial data …

[HTML][HTML] Inverse source problem for a time-fractional diffusion equation with nonlocal boundary conditions

MI Ismailov, M Çiçek - Applied Mathematical Modelling, 2016 - Elsevier
In this paper, an inverse problem of determining a time-dependent source term in a one-
dimensional time-fractional diffusion equation from the energy measurement is studied. This …

[PDF][PDF] Determination of a source term for a time fractional diffusion equation with an integral type over-determining condition

TS Aleroev, M Kirane, SA Malik - Electronic Journal of …, 2013 - ejde.math.txstate.edu
We consider a linear heat equation involving a fractional derivative in time, with a nonlocal
boundary condition. We determine a source term independent of the space variable, and the …