Results 31 to 40 of about 40,549 (156)

ON THE METHOD FOR RECONSTRUCTING THE BOUNDARY CONDITION FOR PARABOLIC LINEAR EQUATIONS

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020
Background. A problem of determination of unknown boundary condition often appears in different fields of physics and technical sciences in cases when direct measuring of field characteristics at some part of the boundary is difficult or even ...
I. V. Boykov, V. A. Ryazantsev
doaj   +1 more source

Three-dimensional modeling of temporal field by radial and finite-differential methods for solving the problems of seismology

Геофизический журнал, 2019
Three-dimensional modeling of temporal field allows reconstructing the kinamatics of wave processes observed in the Earth during seismic studies and determine in such a way spatial position into it of the studied objects.
V.N. Pilipenko, A.O. Verpakhovskaya
doaj   +1 more source

Dynamic inverse problem in a weakly laterally inhomogeneous medium [PDF]

, 2005
An inverse problem of wave propagation into a weakly laterally inhomogeneous medium occupying a half-space is considered in the acoustic approximation. The half-space consists of an upper layer and a semi-infinite bottom separated with an interface.
Blagovestchenskii, A. S., Kurylev, Y., Zalipaev, V.   +2 more
core   +2 more sources

A numerical method for efficient 3D inversions using Richards equation

, 2017
Fluid flow in the vadose zone is governed by Richards equation; it is parameterized by hydraulic conductivity, which is a nonlinear function of pressure head.
Cockett, Rowan, Haber, Eldad, Heagy, Lindsey J.   +2 more
core   +1 more source

A hybridizable discontinuous Galerkin method for electromagnetics with a view on subsurface applications

, 2019
Two Hybridizable Discontinuous Galerkin (HDG) schemes for the solution of Maxwell's equations in the time domain are presented. The first method is based on an electromagnetic diffusion equation, while the second is based on Faraday's and Maxwell--Amp ...
Berardocco, Luca, Gravemeier, Volker, Kronbichler, Martin   +2 more
core   +1 more source

Some Examples Of Inverse Problems In Geophysics

, 1998
Publication in the conference proceedings of EUSIPCO, Rhodes, Greece ...
Lavielle, Marc, Marquez, David
openaire   +1 more source

Seismic Wave Propagation Simulation With Quantum Computing

Journal of Geophysical Research: Machine Learning and Computation
Nowadays, the utilization of quantum computing is on the rise, with its applications extending across numerous fields. This new computing paradigm is likely to inject fresh blood into the development of multiple disciplines.
Xixiang Wen, Yanfei Wang
doaj   +1 more source

Physics‐Informed Deep Learning for Forward and Inverse Modeling of Inplane Crustal Deformation

Journal of Geophysical Research: Machine Learning and Computation
Methods for modeling crustal deformation related to earthquakes and plate motions have been developed to incorporate complex crustal structures and multi‐fidelity observations.
Tomohisa Okazaki, Kazuro Hirahara, Takeo Ito, Masayuki Kano, Naonori Ueda   +4 more
doaj   +1 more source

Estimating Nuisance Parameters in Inverse Problems

, 2012
Many inverse problems include nuisance parameters which, while not of direct interest, are required to recover primary parameters. Structure present in these problems allows efficient optimization strategies - a well known example is variable projection,
Aleksandr Y Aravkin, Aravkin A Y, Aravkin A Y Styer M Moratto Z Nefian A Broxton M, Bunks C, Fahrmeir L, Golub G H, Horesh L, Lange K L, Nelder J A, Osborne M R, Petersen K B, Rockafellar R T, Schmidt M Van Den Berg E Friedlander M P Murphy K, Seber G A F, Tarantola A, Tarantola A, Tristan van Leeuwen, Venables W N   +17 more
core   +1 more source

Combinatoric-Variational Approach to Solving Inverse Problems in Geophysics Within the Framework of the Discrete Potential Theory. Complex Geological Environment

Russian Journal of Earth Sciences
Variational-combinatoric approach is used when solving linear and nonlinear inverse problems of geophysics within the framework of discrete potential. The acquired data about physical fields and their sources are of discrete character.
Stepanova Inna, Kolotov Igor
doaj   +1 more source