Results 81 to 90 of about 26,525 (190)

Relations between the orthogonal matrix polynomials on [a, b], Dyukarev-Stieltjes parameters, and Schur complements

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.
doaj   +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., Chugunov V.N., Ikramov Kh.D.   +2 more
doaj   +1 more source

Eigenvalue asymptotics for a class of multi-variable Hankel matrices

Concrete Operators, 2023
A one-variable Hankel matrix Ha{H}_{a} is an infinite matrix Ha=[a(i+j)]i,j≥0{H}_{a}={\left[a\left(i+j)]}_{i,j\ge 0}. Similarly, for any d≥2d\ge 2, a dd-variable Hankel matrix is defined as Ha=[a(i+j)]{H}_{{\bf{a}}}=\left[{\bf{a}}\left({\bf{i}}+{\bf{j}})]
Tantalakis Christos Panagiotis
doaj   +1 more source

Tackling High Dimensionality in QSP: Guiding Model Order Reduction With Index Analysis

CPT: Pharmacometrics &Systems Pharmacology, Volume 15, Issue 2, February 2026.
ABSTRACT Quantitative systems pharmacology (QSP) models offer a useful platform to integrate drug pharmacology with knowledge about biological mechanisms across multiple scales and data sources into a unified quantitative framework. This makes them invaluable to address many relevant questions in drug research and development.
Johannes Tillil, Wilhelm Huisinga, Jane Knöchel   +2 more
wiley   +1 more source

Iron Overload Mediates the Differential Cell Fate of Astrocytes from Neurons and Its Regulatory Mechanisms in Ischemic Stroke

Advanced Science, Volume 13, Issue 4, 19 January 2026.
Upon ischemia/reperfusion‐induced iron overload condition, neurons and astrocytes exhibit similar oxidative stress changes but opposite alterations in endogenous antioxidant defense mechanisms, leading to divergent ferroptotic outcomes. The iron deposition and neuronal loss are increased within the perilesional cortex of stroke patients ...
Yi Guo, Yue Wang, Yong Ni, Bin Bo, Jinzhi He, Yongming Zhu, Aiping Qin, Xianyong Zhou, Huaping Du, Yuan Liu, Tianyao Wang, Yudu Li, Yibo Zhao, Zengai Chen, Zhipei Liang, Yao Li, Yuan Xu, Huiling Zhang   +17 more
wiley   +1 more source

Polynomial computation of Hankel singular values [PDF]

, 1992
A revised and improved version of a polynomial algorithm is presented. It was published by N.J. Young (1990) for the computation of the singular values and vectors of the Hankel operator defined by a linear time-invariant system with a rotational ...
Kwakernaak, Huibert
core   +1 more source

Iterative Eigenvalue Decomposition of Hankel Matrix: An EMD Like Tool

Journal of the Franklin Institute, 2022
<p>The decomposition of a multicomponent non-stationary signal is helpful in obtaining its time-frequency distribution (TFD). In this paper, a novel empirical mode decomposition (EMD) like eigenvalue decomposition of Hankel matrix (EVDHM) technique is proposed, which extracts the mono-component signal iteratively.
Vivek Kumar Singh, Ram Bilas Pachori
openaire   +1 more source

Reproducibility of Metabolic Mapping Using 2D Multi‐Slice Short‐TE and GABA‐Edited Spin‐Echo MRSI at 3T in a Single Protocol

NMR in Biomedicine, Volume 39, Issue 1, January 2026.
Short‐TE MRSI at 3T enables reproducible metabolic mapping for tNAA, tCr, tCho, mI, and Glx; however, GABA+ mapping with edited MRSI remains challenging due to susceptibility to intermittent subject motion. Although 96% of regions from the short‐TE MRSI met quality control for major metabolites for at least one visit, only 82.5% of voxels of the GABA ...
Helge J. Zöllner, Dillip K. Senapati, İpek Özdemir, Kimberly L. Chan, Georg Oeltzschner, Doris D. M. Lin, Peter B. Barker   +6 more
wiley   +1 more source

Hankel Tensors: Associated Hankel Matrices and Vandermonde Decomposition

, 2014
Hankel tensors arise from applications such as signal processing. In this paper, we make an initial study on Hankel tensors. For each Hankel tensor, we associate it with a Hankel matrix and a higher order two-dimensional symmetric tensor, which we call ...
Qi, Liqun
core  

Gradient Scheme Optimization for PRESS‐Localized Edited MRS Using Weighted Pathway Suppression

NMR in Biomedicine, Volume 39, Issue 1, January 2026.
This study presents an optimized DOTCOPS‐based gradient scheme for PRESS‐localized edited MRS that integrates a volume‐based likelihood model to prioritize suppression of unwanted coherence transfer pathways. Using a dual‐penalty genetic algorithm, the scheme achieved a 197% increase in k‐space crushing efficiency and significantly reduced out‐of‐voxel
Gizeaddis L. Simegn, Zahra Shams, Saipavitra Murali‐Manohar, Dunja Simicic, Abdelrahman Gad, Yulu Song, Vivek Yedavalli, Christopher W. Davies‐Jenkins, Aaron T. Gudmundson, Helge J. Zöllner, Georg Oeltzschner, Richard A. E. Edden   +11 more
wiley   +1 more source