Results 51 to 60 of about 427,210 (205)

On the Limiting Distribution of the Spectra of Random Block Matrices

Mathematics
The behavior of the spectra of symmetric block-type random matrices with symmetric blocks of high dimensionality is considered in this paper. Under minimal conditions regarding the distributions of matrix block elements (Lindeberg conditions), the ...
Alexander N. Tikhomirov
doaj   +1 more source

Cross‐Entropy of Power Spectral Density Function: A Modal Identification Framework

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 12, Page 3012-3028, 10 October 2026.
ABSTRACT The power spectral density (PSD) function of measured structural response contains a significant amount of information, including the modal parameters (natural frequencies, damping ratios). Output‐only system identification or modal identification technique can be used for extracting such modal parameters from the measured response or its ...
Su‐Hong Kim, Jae‐Seung Hwang, Dae‐Kun Kwon, Ahsan Kareem   +3 more
wiley   +1 more source

Operadores de Hankel [PDF]

, 2006
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Matemática e Computação CientíficaNesta dissertação, estudaremos o Teorema de Nehari, nosso principal resultado, que ...
Freitas, Daiane Silva de
core  

Bidiagonal Factorizations of Filbert and Lilbert Matrices

Axioms
Extensions of Filbert and Lilbert matrices are addressed in this work. They are reciprocal Hankel matrices based on Fibonacci and Lucas numbers, respectively, and both are related to Hilbert matrices.
Yasmina Khiar, Esmeralda Mainar, Juan Manuel Peña, Eduardo Royo-Amondarain, Beatriz Rubio   +4 more
doaj   +1 more source

Multiple‐TE Based Blood–Brain‐Barrier Water Exchange Time Measurement Using a TE‐Resolved 3D TSE Stack‐Of‐Spirals Readout

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1629-1644, October 2026.
ABSTRACT Purpose To develop a slice‐wise blurring‐free and densely sampled TE‐resolved multiple‐TE (mTE) ASL sequence (TASL) for measuring blood–brain barrier (BBB) water exchange time. Methods A 3D TSE spiral‐readout pCASL sequence was modified to enable TE‐resolved acquisition.
Bo Li, Yiran Li, Xiao Liang, Amnah Mahroo, Manuel Taso, Marta Vidorreta Díaz de Cerio, Lucas Lemos Franco, Yulin Chang, María Asunción Fernández Seara, Matthias Günther, John A. Detre, Ze Wang   +11 more
wiley   +1 more source

Recursive Delta-Operator-Based Subspace Identification with Fixed Data Size

Complexity, 2023
This paper proposes a recursive delta-operator-based subspace identification method with fixed data size. The majority of existing subspace identification methods are constrained to discrete-time systems because of the disparity in Hankel matrices ...
Miao Yu, Wanli Wang, Youyi Wang, Liang Liu   +3 more
doaj   +1 more source

Probing Strong Coupling in Core–Shell Nanoparticles With Fast Electron Beams

physica status solidi (a), Volume 223, Issue 17, 9 September 2026.
An exact analytic formalism for evaluating electron‐energy loss and cathodoluminescence probabilities for core–shell nanoparticles explored by electron‐beam spectroscopies is derived. The formalism is exploited to understand strong exciton–plasmon and exciton–Mie mode coupling in nanophotonic architectures.
Annika Brandt, Christos Tserkezis, Carsten Rockstuhl, P. Elli Stamatopoulou   +3 more
wiley   +1 more source

Multiple Bound States in the Continuum in Deep‐Subwavelength Nonlocal Polar Dielectric Nanoparticles

Nanophotonics, Volume 15, Issue 15, 13 August 2026.
Spatial dispersion in polar‐dielectric core–shell nanoparticles enable multiple deep‐subwavelength bound states in the continuum through longitudinal‐transverse hybrid modes. By suppressing radiative damping at finite geometrical parameters, these nonlocality‐induced BICs provide a compact platform for high Q light confinement, enhanced light–matter ...
Man Lin, Ye Zhang, Xiaofeng Xu, Fengchuan Xu, Yunqiao Yin, Jie Luo, Lei Gao   +6 more
wiley   +1 more source

Some Propositions on Generalized Nevanlinna Functions of the Class Nk

Advances in Mathematical Physics, 2014
Some propositions on the generalized Nevanlinna functions are derived. We indicate mainly that (1) the negative inertia index of a Hermitian generalized Loewner matrix generated by a generalized Nevanlinna function in the class Nκ does not exceed κ. This
Yan-Ping Song, Hui-Feng Hao, Yong-Jian Hu, Gong-Ning Chen   +3 more
doaj   +1 more source

Low Density Parity Check Codes Constructed from Hankel Matrices

Journal of Telecommunications and Information Technology, 2018
In this paper, a new technique for constructing low density parity check codes based on the Hankel matrix and circulant permutation matrices is proposed. The new codes are exempt of any cycle of length 4.
Mohammed Amine Tehami
doaj   +1 more source