Results 101 to 110 of about 7,882 (230)
A multigrid for image deblurring with Tikhonov regularization [PDF]
Numerical Linear Algebra with Applications, 2005 AbstractIn the resolution of certain image deblurring problems with given boundary conditions we obtain two‐level structured linear systems. In the case of shift‐invariant point spread function with Dirichlet (zero) boundary conditions, the blurring matrices are block Toeplitz matrices with Toeplitz blocks. If the periodic boundary conditions are used,
openaire +2 more sources
Quantitative Diffusion and T2 Mapping Using RF‐Modulated Phase‐Based Gradient Echo Imaging
Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 49-65, July 2026.ABSTRACT Purpose To introduce and evaluate the feasibility of a novel RF‐phase modulated gradient echo (GRE) method for quantitative diffusion MRI, aimed at mitigating geometric distortion and enabling high‐resolution 3D quantitative diffusion/T2 mapping as a complementary alternative to conventional DWI.
Daiki Tamada +4 more
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Identification and estimation by penalization in nonparametric instrumental regression [PDF]
The nonparametric estimation of a regression function x from conditional moment restrictions involving instrumental variables is considered. The rate of convergence of penalized estimators is studied in the case where x is not identified from the ...
FLORENS, Jean-Pierre +2 more
core
Seeing Through Scattering With Computational Advances: A Review
Advanced Photonics Research, Volume 7, Issue 6, June 2026.In scattering media, light scrambles into random speckles and impedes our vision. Unlocking hidden information enables breakthroughs to see behind the opaqueness, inspiring applications in imaging, communication, and encryption. Unlike clear media such as clear water and air, a scattering medium is inhomogeneous, in which propagating photons are ...
Huanhao Li +4 more
wiley +1 more source
Advanced Science, Volume 13, Issue 31, 4 June 2026.Geometry and connectivity are complementary structures, which have demonstrated their ability to represent the brain's functional activity. This study evaluates geometric and connectome eigenmodes as biologically informed constraints for EEG source localization.
Pok Him Siu +6 more
wiley +1 more source
Ecography, Volume 2026, Issue 6, June 2026.The transferability of single or joint species distribution models ((j)SDMs) depends on their ability to predict beyond the observed environmental range and to remain consistent despite shifts in biotic interactions. Transfer accuracy may be improved by recent advances in the application of deep learning that provide greater flexibility and potentially
Marco Basile +44 more
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Influence of the Tikhonov Regularization Parameter on the Accuracy of the Inverse Problem in Electrocardiography. [PDF]
Sensors (Basel), 2023 Wang T, Karel J, Bonizzi P, Peeters RLM.
europepmc +1 more source
Recent advances in organic broad‐spectrum photodetection materials and devices
InfoMat, Volume 8, Issue 6, June 2026.This review systematically outlines the evolution of organic photodetectors from fullerene‐based to advanced non‐fullerene acceptors, highlighting how molecular engineering (e.g., D–A, quinoidal, and A‐D‐A′‐D‐A architectures) extends spectral response into the short‐wave infrared region.
Yilin Zhao +3 more
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Numerical Methods for Ill-Posed, Linear Problems [PDF]
, 1975 A means of assessing the effectiveness of methods used in the numerical solution of various linear ill-posed problems is outlined. Two methods: Tikhonov' s method of regularization and the quasireversibility method of Lattès and Lions are appraised from ...
Stevens, Thomas
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Computation of distribution of relaxation times by Tikhonov regularization for Li ion batteries: usage of L-curve method. [PDF]
Sci Rep, 2021 Paul T, Chi PW, Wu PM, Wu MK.
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