Results 101 to 110 of about 24,593 (203)
Tikhonov regularization of a second order dynamical system with Hessian driven damping. [PDF]
Math Program, 2021 Boţ RI, Csetnek ER, László SC.
europepmc +1 more source
X‐ray waveguide optics at GINIX/P10 PETRA III: recent progress and future directions
Journal of Synchrotron Radiation, Volume 33, Issue 2, Page 298-313, March 2026.X‐ray waveguide optics enable spatial and coherence filtering of a nano‐focused synchrotron beam and provide tailored illumination wavefronts for holographic imaging. Progress in fabrication, characterization and advanced waveguide interferometers can enhance holographic imaging.Here we report on recent progress in X‐ray waveguide optics for full‐field
Tim Salditt +8 more
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International Journal for Numerical Methods in Engineering, Volume 127, Issue 4, 28 February 2026.ABSTRACT Wave propagation effects such as resonance and interference effects complicate the design of many acoustic devices, particularly when the dimensions of the device are in the order of the operating wavelength. At the same time, these complications also offer an opportunity for numerical optimization schemes to outperform designs achieved using ...
Martin Berggren +4 more
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JWST Discovers the Vertical Structure of Uranus' Ionosphere
Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.Abstract On 19 January 2025, the James Webb Space Telescope (JWST) program # $\mathrm{\#}$5073 observed Uranus for almost a full rotation with NIRSpec. We present the first ever vertical ionospheric profiles of H3+ ${\mathrm{H}}_{3}^{+}$ temperature, volumetric density and total emission.
Paola I. Tiranti +7 more
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Determination of the Distribution of the Relaxation Times from Dielectric Spectra
Nonlinear Analysis, 2004 The dielectric susceptibility measurements are usually interpreted in terms of the relaxation times of various dynamical processes. Using the simple examples of the simulated spectra it is shown how the distribution of these relaxation times can be ...
J. Macutkevic, J. Banys, A. Matulis
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Finite element method for solving nonlinear inverse diffusion problem
پژوهشهای ریاضی, 2021 In this paper, a numerical method based on the finite element method and the least square scheme with the Tikhonov regularization method for nonlinear inverse diffusion problem is presented.
Hamed Zeidabadi +2 more
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Smoothing Approximations for Least Squares Minimization with L1-Norm Regularization Functional
International Journal of Analysis and Applications, 2021 The paper considers the problem of least squares minimization with L1-norm regularization functional. It investigates various smoothing approximations for the L1-norm functional. It considers Quadratic, Sigmoid and Cubic Hermite functionals.
Henrietta Nkansah +2 more
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Nonstationary lterated Tikhonov Regularization
, 1996 A convergence rate is established for nonstationary iterated Tikhonov regularization, applied to ill-posed problems involving closed, densely defined linear operators, under general conditions on the iteration parameters. lt is also shown that an order-optimal accuracy is attained when a certain a posteriori stopping rule is used to determine the ...
Hanke, Martin, Groetsch, C.W.
openaire
Boundary Value ProblemsThis research studies the inverse boundary value problem for fractional elliptic equation of Tricomi–Gellerstedt–Keldysh type and obtains a condition stability result.
Xiao Zhang
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Regularización de Tikhonov para estimar los parámetros de un modelo de un horno de arco
Tecnura, 2013 In this paper, we present a methodology for estimating the parameters of a model for an electrical arc furnace by using Tikhonov regularization. Tikhonov regularization is one of the most widely employed methods for regularization. The model proposed for
Jesser James Marulanda Durango +3 more
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