Results 71 to 80 of about 11,051,325 (215)

Regularized Joint Reconstruction and Slab Combination for Accelerated Three‐Dimensional Multi‐Slab Diffusion‐Weighted Imaging Using Multi‐Scale Energy Models

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2321-2335, November 2026.
ABSTRACT Purpose To jointly reconstruct high‐resolution diffusion‐weighted volumes and eliminate slab‐boundary artifacts while preserving fine anatomical detail from undersampled 3D multi‐slab k‐space acquisitions. Methods A bilinear forward model was formulated to describe the 3D multi‐slab acquisition, treating the image volume and slab excitation ...
Reza Ghorbani, Jyothi Rikhab Chand, Chu‐Yu Lee, Mathews Jacob, Merry Mani   +4 more
wiley   +1 more source

Fractional Tikhonov regularization for linear discrete ill-posed problems [PDF]

, 2011
Tikhonov regularization is one of the most popular methods for solving linear systems of equations or linear least-squares problems with a severely ill-conditioned matrix A. This method replaces the given problem by a penalized least-squares problem. The
Reichel, L., Michiel E. Hochstenbach, Hochstenbach, ME Michiel, Hochstenbach, M.E., Reichel, L Lothar, Lothar Reichel   +5 more
core   +2 more sources

Research on Dynamic Load Identification Based on Explicit Wilson-θ and Improved Regularization Algorithm

Shock and Vibration, 2019
In the research of dynamic load identification, the method of obtaining kernel function matrix is usually rather cumbersome. To solve this problem, an explicit dynamic load identification algorithm based on the Wilson-θ (DLIAEW) method is proposed to ...
Yuchuan Fan, Chunyu Zhao, Hongye Yu
doaj   +1 more source

Sylvester Tikhonov-regularization methods in image restoration

Journal of Computational and Applied Mathematics, 2007
The authors consider large-scale linear discrete ill posed problems where the right-hand side contains noise. In order to control the effect of the noise on the solution, regularization techniques such as Tikhonov are needed. In many applications the coefficient matrix is given as a Kronecker product of two matrices and then the Tikhonov regularization
Bouhamidi, A., Jbilou, K.
openaire   +1 more source

Inter‐Shot Motion Correction of Segmented 3D‐GRASE ASL Perfusion Imaging With Self‐Navigation and CAIPI

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1557-1571, October 2026.
ABSTRACT Purpose Segmented 3D Gradient and Spin Echo (GRASE) is commonly used in Arterial Spin Labeling (ASL) perfusion imaging. However, it is vulnerable to inter‐shot motion, leading to subtraction errors that cannot be corrected. We developed a retrospective self‐navigated inter‐shot motion correction method for segmented 3D‐GRASE ASL imaging with ...
Minhao Hu, Frederik J. Lange, Peter Jezzard, Joseph G. Woods, Mark Chiew, Thomas W. Okell   +5 more
wiley   +1 more source

Multidirectional Subspace Expansion for One-Parameter and Multiparameter Tikhonov Regularization [PDF]

, 2016
Tikhonov regularization is a popular method to approximate solutions of linear discrete ill-posed problems when the observed or measured data is contaminated by noise.
Michiel E. Hochstenbach, Hochstenbach, M.E., Hochstenbach, ME Michiel, Ian N. Zwaan, Zwaan, I.N., Zwaan, IN Ian   +5 more
core   +4 more sources

First Results of Atmospheric Composition Retrieval using IASI-METOP and AIRS-AQUA Data [PDF]

, 2009
Regularization methods for the inversion of infrared nadir sounding observations are currently investigated. An iterative Runge-Kutta type method for nonlinear ill-posed problems has been implemented and its performance has been studied using synthetic ...
Doicu, Adrian, Hoffmann, Peter, Gimeno-Garcia, Sebastian, Schreier, Franz, Szopa, Michal, Boeckmann, Christine   +5 more
core  

Humins‐Derived Hard Carbon as a Low‐Cost Material for Sodium‐Ion Battery Anodes

Battery Energy, Volume 5, Issue 5, September 2026.
Humins are oxygen‐rich polymeric residues with high carbon content and inherent porosity. In this study, humins‐derived hard carbon is evaluated as an anode material for sodium‐ion batteries, demonstrating promising reversible specific sodiation capacity, 270 mA h g − 1 $270\,{\text{mA h g}}^{-1}$ at 0.1C, with stable cycling up to 500 cycles and ...
Ravindra K. Bhardwaj, Adarsh Kumar, Steven M. Rowland, Abhijit Dutta, Ashutosh Mittal, Bertrand J. Tremolet de Villers   +5 more
wiley   +1 more source

Primenenie metoda regulyarizatsii Tikhonova dlya opredeleniya ostatochnykh napryazheniy

Structural Mechanics of Engineering Constructions and Buildings, 2009
Application of the Tikhonov Regularization for residual stresses determination Fimkin A.I. The problem of determining the technological residual stresses in the volume of railway rails is considered.
ALEKSANDR IVANOVICh FIMKIN
doaj  

Tikhonov regularization method for identifying the space-dependent source for time-fractional diffusion equation on a columnar symmetric domain

Advances in Difference Equations, 2020
In this paper, we deal with the inverse problem of identifying the unknown source of time-fractional diffusion equation on a columnar symmetric domain. This problem is ill-posed.
Fan Yang, Pan Zhang, Xiao-Xiao Li, Xin-Yi Ma   +3 more
doaj   +1 more source