Hybrid neural-network FEM approximation of diffusion coefficient in elliptic and parabolic problems
In this work we investigate the numerical identification of the diffusion coefficient in elliptic
and parabolic problems using neural networks (NNs). The numerical scheme is based on …
and parabolic problems using neural networks (NNs). The numerical scheme is based on …
Convergence rates of Tikhonov regularizations for elliptic and parabolic inverse radiativity problems
We shall study in this paper the convergence rates of the Tikhonov regularized solutions for
the recovery of the radiativities in elliptic and parabolic systems in general dimensional …
the recovery of the radiativities in elliptic and parabolic systems in general dimensional …
Learning river water quality models by l1-weighted regularization
D Nho Hào, D Xuan Hiep… - IMA Journal of Applied …, 2024 - academic.oup.com
We investigate the problem of learning a water quality model (BOD-DO model) from given
data. Assuming that all parameters in the model are constants, we reformulate the problem …
data. Assuming that all parameters in the model are constants, we reformulate the problem …
A theoretical study for RTE-based parameter identification problems
J Tang, W Han, B Han - Inverse Problems, 2013 - iopscience.iop.org
This paper provides a theoretical study of reconstructing absorption and scattering
coefficients based on the radiative transport equation (RTE) by using the total variation …
coefficients based on the radiative transport equation (RTE) by using the total variation …
[HTML][HTML] Descent gradient methods for nonsmooth minimization problems in ill-posed problems
Descent gradient methods are the most frequently used algorithms for computing
regularizers of inverse problems. They are either directly applied to the discrepancy term …
regularizers of inverse problems. They are either directly applied to the discrepancy term …
Convergence rates for total variation regularization of coefficient identification problems in elliptic equations II
We investigate the convergence rates for total variation regularization of the problem of
identifying (i) the coefficient q in the Neumann problem for the elliptic equation− div (q∇ u) …
identifying (i) the coefficient q in the Neumann problem for the elliptic equation− div (q∇ u) …
An inverse boundary value problem for a second order elliptic equation in a rectangle
YT Mehraliyev, F Kanca - Mathematical Modelling and Analysis, 2014 - Taylor & Francis
In this paper, the inverse problem of finding a coefficient in a second order elliptic equation
is investigated. The conditions for the existence and uniqueness of the classical solution of …
is investigated. The conditions for the existence and uniqueness of the classical solution of …
Matrix coefficient identification in an elliptic equation with the convex energy functional method
In this paper we study the inverse problem of identifying the diffusion matrix in an elliptic
PDE from measurements. The convex energy functional method with Tikhonov …
PDE from measurements. The convex energy functional method with Tikhonov …
Convergence rates of Tikhonov regularizations for parameter identification in a parabolic-elliptic system
D Jiang, H Feng, J Zou - Inverse Problems, 2012 - iopscience.iop.org
We shall study the convergence rates of the Tikhonov regularizations for the identification of
the diffusivity q (x) in a parabolic–elliptic system. The H 1 regularization and a mixed L p–H 1 …
the diffusivity q (x) in a parabolic–elliptic system. The H 1 regularization and a mixed L p–H 1 …
Finite element approximation of source term identification with TV-regularization
In this paper we investigate the problem of recovering the source f in the elliptic system from
an observation z of the state u on a part of the boundary, where the functions and j are given …
an observation z of the state u on a part of the boundary, where the functions and j are given …