Results 81 to 90 of about 26,670 (208)
Robust and Efficient Harmonics Denoising in Large Dataset Based on Random SVD and Soft Thresholding
IEEE Access, 2019 The Hankel matrix of harmonic signals has the important low-rank property, based on which the principal components (or the eigenvectors) extracted from the matrix by singular value decomposition (SVD) could be applied for harmonic signal denoising ...
Yu Yang, Jian Rao
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Structured Nuclear Norm Matrix Completion: Guaranteeing Exact Recovery via Block‐Column Scaling
Numerical Linear Algebra with Applications, Volume 32, Issue 4, August 2025.ABSTRACT The goal of low‐rank matrix completion is to minimize the rank of a matrix while adhering to the constraint that known (non‐missing) elements are fixed in the approximation. Minimizing rank is a difficult, non‐convex, NP‐hard problem, often addressed by substituting rank with the nuclear norm to achieve a convex relaxation.
Konstantin Usevich +3 more
wiley +1 more source
On the spectral properties of real antitridiagonal Hankel matrices
Special Matrices, 2022 In this article, we express the eigenvalues of real antitridiagonal Hankel matrices as the zeros of given rational functions. We still derive eigenvectors for these structured matrices at the expense of prescribed eigenvalues.
Lita da Silva João
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Rapid quantitative MRI at 46 mT: Accelerated T1 and T2 mapping with low‐rank reconstructions
Magnetic Resonance in Medicine, Volume 94, Issue 1, Page 119-133, July 2025.Abstract Purpose To evaluate accelerated T1‐ and T2‐mapping techniques for ultra–low‐field MRI using low‐rank reconstruction methods. Methods Two low‐rank–based algorithms, image‐based locally low‐rank (LLR) and k‐space–based structured low‐rank (SLR), were implemented to accelerate T1 and T2 mapping on a 46 mT Halbach MRI scanner.
Yiming Dong +5 more
wiley +1 more source
Hankel and Toeplitz operators: continuous and discrete representations
, 2016 We find a relation guaranteeing that Hankel operators realized in the space of sequences $\ell^2 ({\Bbb Z}_{+}) $ and in the space of functions $L^2 ({\Bbb R}_{+}) $ are unitarily equivalent.
Yafaev, D. R.
core +3 more sources
Spanning Multi‐Asset Payoffs With ReLUs
Mathematical Finance, Volume 35, Issue 3, Page 682-707, July 2025.ABSTRACT We propose a distributional formulation of the spanning problem of a multi‐asset payoff by vanilla basket options. This problem is shown to have a unique solution if and only if the payoff function is even and absolutely homogeneous, and we establish a Fourier‐based formula to calculate the solution.
Sébastien Bossu +2 more
wiley +1 more source
Unitary automorphisms of the space of Toeplitz-plus-Hankel matrices
Special Matrices, 2015 Our motivation was a paper of 1991 indicating three special unitary matrices that map Hermitian Toeplitz matrices by similarity into real Toeplitz-plus-Hankel matrices.
Abdikalykov A.K. +2 more
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Special Matrices, 2017 We obtain explicit interrelations between new Dyukarev-Stieltjes matrix parameters and orthogonal matrix polynomials on a finite interval [a, b], as well as the Schur complements of the block Hankel matrices constructed through the moments of the ...
Choque-Rivero A.E.
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State space model realization using step response data of MIMO system with input delays for model predictive control [PDF]
Acta Periodica Technologica, 2019 This paper discusses state space realization algorithm from general multiple input multiple output (MIMO) step response data with or without input delays.
Jimoh Mohammed T., Dan’Isa Ado
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Medical Physics, Volume 52, Issue 6, Page 3557-3569, June 2025.Abstract Background Microwave breast hyperthermia is a noninvasive treatment method for breast cancer that utilizes microwave energy (ME) sources to raise tissue temperatures above 42∘C$^{\circ }{\rm C}$, inducing tumor cell necrosis. The efficiency of ME deposition depends on the electric field magnitude and tissue conductivity, with antenna phase and
Burak Acar, Tuba Yilmaz, Ali Yapar
wiley +1 more source