Results 41 to 50 of about 5,632,119 (202)

Application of inversion methods in solving ill-posed problems for magnetic parameter identification of steel hull vessel

open access: yes, 2011
Recovery of magnetic target parameters from magnetic sensor measurements has attracted wide interests and found many practical applications. However, difficulties present in identifying the permanent magnetization due to the complications of ...
Yagola A.G.   +2 more
core   +1 more source

A coupled complex boundary expanding compacts method for inverse source problems

open access: yes, 2019
In this paper, we consider an inverse source problem for elliptic partial differential equations with both Dirichlet and Neumann boundary conditions. The unknown source term is to be determined by additional boundary data. This problem is ill-posed since
Gulliksson, Mårten,   +3 more
core   +1 more source

Iterative Regularization in Nonparametric Instrumental Regression [PDF]

open access: yes
We consider the nonparametric regression model with an additive error that is correlated with the explanatory variables. We suppose the existence of instrumental variables that are considered in this model for the identification and the estimation of the
Van Bellegem, Sébastien   +2 more
core   +2 more sources

METHOD OF TRAINING EXAMPLES IN SOLVING INVERSE ILL-POSED PROBLEMS OF SPECTROSCOPY [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
Subject of Study.The paper deals with further development of the method of computational experiments for solving ill-posed problems, e.g., the inverse spectroscopy problem.
V. S. Sizikov, A. V. Stepanov
doaj   +1 more source

Solving ill-posed control problems by stabilized finite element methods: an alternative to Tikhonov regularization [PDF]

open access: yes, 2018
Tikhonov regularization is one of the most commonly used methods for the regularization of ill-posed problems. In the setting of finite element solutions of elliptic partial differential control problems, Tikhonov regularization amounts to adding ...
Hansbo, P   +12 more
core   +1 more source

On a Two-Step Algorithm for Hierarchical Fixed Point Problems and Variational Inequalities

open access: yesJournal of Inequalities and Applications, 2009
A common method in solving ill-posed problems is to substitute the original problem by a family of well-posed (i.e., with a unique solution) regularized problems.
Filomena Cianciaruso   +3 more
doaj   +2 more sources

Projection Methods for Ill-Posed Problems Revisited [PDF]

open access: yesComputational Methods in Applied Mathematics, 2015
Abstract We consider the discretization of least-squares problems for linear ill-posed operator equations in Hilbert spaces. The main subject of this article concerns conditions for convergence of the associated discretized minimum-norm least-squares solution to the exact solution using exact attainable data.
openaire   +3 more sources

Optimal regularization method for ill-posed Cauchy problems

open access: yesElectronic Journal of Differential Equations, 2006
The goal of this paper is to give an optimal regularization method for an ill-posed Cauchy problem associated with an unbounded linear operator in a Hilbert space.
Nadjib Boussetila, Faouzia Rebbani
doaj  

An entropic Landweber method for linear ill-posed problems [PDF]

open access: yes, 2019
The aim of this paper is to investigate the use of a Landweber-type method involving the Shannon entropy for the regularization of linear ill-posed problems.
Benning, M   +5 more
core   +1 more source

On the Optimality of Methods for Ill-Posed Problems

open access: yesZeitschrift für Analysis und ihre Anwendungen, 1987
The optimality of a class of regularization methods for linear ill-posed problems is investigated. The general results are applied to Lavrentjew’s and Tikhonov’s methods and to a class of iteration methods and their continuous versions.
openaire   +2 more sources

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