[图书][B] An introduction to the mathematical theory of inverse problems

A Kirsch - 2011 - Springer
2 Introduction that the law of formation has been found. The corresponding direct problem is
to evaluate the sequence (an) given the law of formation. It is clear that such inverse …

Morozov's discrepancy principle for Tikhonov-type functionals with nonlinear operators

SW Anzengruber, R Ramlau - Inverse Problems, 2009 - iopscience.iop.org
In this paper we deal with Morozov's discrepancy principle as an a posteriori parameter
choice rule for Tikhonov regularization with general convex penalty terms Ψ for nonlinear …

A Tikhonov-based projection iteration for nonlinear ill-posed problems with sparsity constraints

R Ramlau, G Teschke - Numerische Mathematik, 2006 - Springer
In this paper, we consider nonlinear inverse problems where the solution is assumed to
have a sparse expansion with respect to a preassigned basis or frame. We develop a …

Mass and aerodynamic imbalance estimates of wind turbines

J Niebsch, R Ramlau, TT Nguyen - Energies, 2010 - mdpi.com
Due to its effect on the operation time of wind turbines, rotor imbalances of a wind turbine
have to be detected early enough. We present a method that determines inhomogeneous …

[图书][B] Inverse problems: Basics, theory and applications in geophysics

M Richter - 2021 - books.google.com
This textbook is an introduction to the subject of inverse problems with an emphasis on
practical solution methods and applications from geophysics. The treatment is …

TIGRA—an iterative algorithm for regularizing nonlinear ill-posed problems

R Ramlau - Inverse Problems, 2003 - iopscience.iop.org
We report on a new iterative method for regularizing a nonlinear operator equation in Hilbert
spaces. The proposed TIGRA algorithm is a combination of Tikhonov regularization and a …

Imbalance estimation without test masses for wind turbines

R Ramlau, J Niebsch - 2009 - asmedigitalcollection.asme.org
Rotor imbalances of a wind turbine can cause severe damage of the turbine or its
components and thus reduce the lifespan and security of the turbine significantly. At present …

Numerical differentiation by the polynomial-exponential basis

PM Nguyen, TT Le, LH Nguyen… - Journal of Applied and …, 2023 - Springer
Our objective is to calculate the derivatives of data corrupted by noise. This is a challenging
task as even small amounts of noise can result in significant errors in the computation. This …

Structure-guided gravity inversion for layered density modeling with an application in the Chezhen Depression, Bohai Bay Basin

J Liu, J Zhang - Geophysics, 2022 - library.seg.org
Gravity inversion, as a static potential field inversion, has inherent ambiguity with low vertical
resolution. To reduce the nonuniqueness of the inversion, it is necessary to impose the a …

Sliding mode control of mechanical systems actuated by shape memory alloy

H Ashrafiuon, VR Jala - 2009 - asmedigitalcollection.asme.org
This paper presents a model-based sliding mode control law for mechanical systems, which
use shape memory alloys (SMAs) as actuators. The systems under consideration are …