Results 31 to 40 of about 35,710 (245)

Inverse coefficient problem for differential equation in partial derivatives of a fourth order in time with integral over-determination

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
Derivatives in time of higher order (more than two) arise in various fields such as acoustics, medical ultrasound, viscoelasticity and thermoelasticity.
M.J. Huntul, I. Tekin
doaj   +1 more source

Completeness of products of solutions and some inverse problems for PDE

open access: bronzeJournal of Differential Equations, 1991
AbstractIn this paper we give conditions which guarantee that products of solutions of partial differential equations Pu + au = 0 are complete in L2(Ω). HereP is a linear partial differential operator with constant coefficients and a is a function in L∞(Ω).
Victor Isakov
openalex   +3 more sources

Physics-Informed Neural Networks for Solving Forward and Inverse Problems in Complex Beam Systems [PDF]

open access: yesIEEE Transactions on Neural Networks and Learning Systems, 2023
This article proposes a new framework using physics-informed neural networks (PINNs) to simulate complex structural systems that consist of single and double beams based on Euler–Bernoulli and Timoshenko theories, where the double beams are connected ...
Taniya Kapoor   +3 more
semanticscholar   +1 more source

An efficient algorithm for some highly nonlinear fractional PDEs in mathematical physics. [PDF]

open access: yesPLoS ONE, 2014
In this paper, a fractional complex transform (FCT) is used to convert the given fractional partial differential equations (FPDEs) into corresponding partial differential equations (PDEs) and subsequently Reduced Differential Transform Method (RDTM) is ...
Jamshad Ahmad, Syed Tauseef Mohyud-Din
doaj   +1 more source

Modeling a Typical Non-Uniform Deformation of Materials Using Physics-Informed Deep Learning: Applications to Forward and Inverse Problems

open access: yesApplied Sciences, 2023
Numerical methods, such as finite element or finite difference, have been widely used in the past decades for modeling solid mechanics problems by solving partial differential equations (PDEs).
Yawen Deng   +5 more
doaj   +1 more source

On an inverse problem for a nonlinear third order in time partial differential equation

open access: yesResults in Applied Mathematics, 2022
In this article, first we convert an inverse problem of determining the unknown timewise terms of nonlinear third order in time partial differential equation (PDE) from knowledge of two boundary measurements to the auxiliary system of integral equations.
M.J. Huntul, I. Tekin
doaj   +1 more source

FDM data driven U-Net as a 2D Laplace PINN solver

open access: yesScientific Reports, 2023
Efficient solution of partial differential equations (PDEs) of physical laws is of interest for manifold applications in computer science and image analysis. However, conventional domain discretization techniques for numerical solving PDEs such as Finite
Anto Nivin Maria Antony   +2 more
doaj   +1 more source

Introduction to inverse problems for hyperbolic PDEs

open access: yes, 2023
These lecture notes were written for CIRM SMF School Spectral Theory, Control and Inverse Problems, November ...
Nursultanov, Medet, Oksanen, Lauri
openaire   +2 more sources

On some nonlinear fractional PDEs in physics

open access: yesBibechana, 2014
In this paper, we applied relatively new fractional complex transform (FCT) to convert the given fractional partial differential equations (FPDEs) into corresponding partial differential equations (PDEs) and Variational Iteration Method (VIM) is to find
Jamshad Ahmad, Syed Tauseef Mohyud-Din
doaj   +3 more sources

On inverse problems modeled by PDE’s [PDF]

open access: yesMatemática Contemporânea, 2000
We investigate the iterative methods proposed by Maz'ya and Kozlov (see [3], [4]) for solving ill-posed reconstruction problems modeled by PDE's. We consider linear time dependent problems of elliptic, hyperbolic and parabolic types. Each iteration of the analyzed methods consists on the solution of a well posed boundary (or initial) value problem. The
openaire   +4 more sources

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