Results 31 to 40 of about 1,759 (181)
BFGS method based variable projection approach for image restoration
IET Image Processing, 2021 In this paper, a variable projection approach based on the BFGS (Broyden–Fletcher–Goldfarb–Shanno) method for image reconstruction problems is proposed, which is an alternative to the common alternating minimisation scheme.
Qiong‐Ying Chen +4 more
doaj +1 more source
Maximum Entropy Approach to Massive Graph Spectrum Learning with Applications
Algorithms, 2022 We propose an alternative maximum entropy approach to learning the spectra of massive graphs. In contrast to state-of-the-art Lanczos algorithm for spectral density estimation and applications thereof, our approach does not require kernel smoothing.
Diego Granziol +5 more
doaj +1 more source
Few‐Photon Fluorescence From Ultracold Bosons in an Optical Cavity
Contributions to Plasma Physics, EarlyView.ABSTRACT Within a cavity quantum electrodynamics framework, we analyse the fluorescent spectrum of ultracold bosons in resonant and second‐harmonic generation (SHG) regimes. Two settings are considered: (i) (few) bosons in an optical lattice and (ii) a trapped two‐component dilute Bose–Einstein condensate (2BEC) within the Bogoliubov scheme.
Megha Gopalakrishna +2 more
wiley +1 more source
A Variant of the Inverted Lanczos Method
BIT Numerical Mathematics, 2001 In this note we study a variant of the inverted Lanczos method which computes eigenvalue approximates of a symmetric matrix A from the projection to a Krylov space of A method at least as long as reorthogonalization is not required. The method is applied to the problem of determining the smallest eigenvalue of a symmetric Toeplitz matrix.
openaire +1 more source
The Radau--Lanczos Method for Matrix Functions
SIAM Journal on Matrix Analysis and Applications, 2017 © SIAM. Deposited by shareyourpaper.org and openaccessbutton.org. We've taken reasonable steps to ensure this content doesn't violate copyright. However, if you think it does you can request a takedown by emailing help@openaccessbutton.org.
Andreas Frommer +3 more
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Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.Abstract Purpose To compare quadriceps tendon (QT) and hamstring tendon (HT) autografts regarding isometric thigh muscle strength, surface electromyography (sEMG) activity and clinical outcomes following anterior cruciate ligament reconstruction (ACLR).
Benjamin Forquignon +8 more
wiley +1 more source
Tridiagonal Hamiltonians modeling the density of states of the double-scaled SYK model
Journal of High Energy PhysicsBy analyzing the global density of states (DOS) in the Double-Scaled Sachdev-Ye-Kitaev (DSSYK) model, we construct a finite-dimensional Hamiltonian that replicates this DOS.
Pratik Nandy
doaj +1 more source
Modal analysis of a small vertical axis wind turbine (Type DARRIEUS) [PDF]
INCAS Bulletin, 2012 This paper reports a brief study on free vibration analysis for determining parameters such as natural frequencies and mode shapes for vertical axis wind turbines (VAWT) for an urban application.
Ion NILA +3 more
doaj +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.Total autumn precipitation in eastern Spain remains stable between 1950 and 2024, masking a substantial internal redistribution between ordinary and extreme rainfall. While torrential precipitation (Rp95) increases and ordinary precipitation (Ro) decreases, the extreme contribution index (Cext) shows a significant positive trend and a structural shift ...
Eduardo A. Agosta +3 more
wiley +1 more source
Journal of Oral Pathology &Medicine, EarlyView.ABSTRACT Background Actinic cheilitis (AC) is a potentially malignant oral disorder linked to lip squamous cell carcinoma (LSCC). Clinical diagnosis is hindered by lesion heterogeneity. While AI tools have shown promise in oral lesion detection and diagnosis, image segmentation remains underexplored. This study developed and externally validated a deep
Vitor Simbalista Teixeira Soares +16 more
wiley +1 more source