Results 81 to 90 of about 3,866 (190)
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
Finite‐Block Polynomial and Volterra Structure in Reservoir Computing
Numerical Linear Algebra with Applications, Volume 33, Issue 4, August 2026.ABSTRACT Reservoir computing is analyzed through the algebraic structure generated by finite‐width reservoirs on fixed input blocks. For linear and quadratic logistic activations, the induced input‐to‐state map admits an exact finite Volterra representation, yielding an explicit characterization of the associated hypothesis class.
Alfio Borzì
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Water Resources Research, Volume 62, Issue 8, August 2026.Abstract Tidal influences are rarely considered in parameter estimation procedures for coastal groundwater flow models. Yet, considering tides adds to the already high computational burden associated with such models due to the presence of density‐dependent flow.
Patrick Haehnel +3 more
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Water Resources Research, Volume 62, Issue 8, August 2026.Abstract Airborne electromagnetic (AEM) surveys offer rapid, cost‐effective subsurface imaging, yet converting their electrical resistivity (ER) models into physically meaningful hydraulic property fields for groundwater models remains a challenge. We develop and demonstrate a data‐driven workflow for an unconsolidated sedimentary aquifer system in ...
Leland Scantlebury, Thomas Harter
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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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Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.Abstract Full waveform inversion (FWI) reconstructs subsurface models by minimizing the mismatch between observed and simulated seismic data. However, the strong nonlinearity of the inversion problem makes gradient‐based optimization highly sensitive to inaccurate initial models and incomplete observational data.
Ning Wang +3 more
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Geocarto InternationalTo systematically and thoroughly analyze the sensitivity and reliability of the MSBAS regularization for the estimation of surface deformation over a mine in combination with an application example, this study processed 101 Sentinel-1A/B SAR images ...
Qiuxiang Tao +5 more
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Song Familiarity Relies on Evidence Accumulation
Psychophysiology, Volume 63, Issue 8, August 2026.ABSTRACT Familiarity judgments are thought to involve evidence accumulation, a decision‐making process in which information is gathered over time until a threshold is reached. Previous work has identified a scalp‐recorded signature of evidence accumulation called the central‐parietal positivity (CPP).
Jared R. Girard +2 more
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Tikhonov regularization of a second order dynamical system with Hessian driven damping. [PDF]
Math Program, 2021 Boţ RI, Csetnek ER, László SC.
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Surface and Boundary Corrections in Peridynamics Using Optimized Nodal Influence Weights
International Journal for Numerical Methods in Engineering, Volume 127, Issue 14, 30 July 2026.ABSTRACT Peridynamics (PD), similarly to some other nonlocal continuum theories, exhibits truncated interaction horizons near free surfaces, cracks, and voids in bounded domains. This loss of neighbors causes artificial surface effects and inconsistencies in the derivative and energy operators that persist under discretization refinement, limiting PD ...
Arman Shojaei +5 more
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