Results 81 to 90 of about 1,581,020 (197)

Finite Biorthogonal Polynomials Suggested by the Finite Orthogonal Polynomials Mnp,qx$$ {M}_n^{\left(p,q\right)}(x) $$

Mathematical Methods in the Applied Sciences, Volume 49, Issue 11, Page 12524-12538, 30 July 2026.
ABSTRACT Constructing a biorthogonal structure from scratch, that is, defining a biorthogonal pair is quite tough. Because here the orthogonality must be established between two different sets. There are four known univariate biorthogonal polynomial sets, suggested by Laguerre, Jacobi, Hermite and Szegő‐Hermite polynomials, in the literature.
Esra Güldoğan Lekesiz
wiley   +1 more source

Multichannel Hankel Matrix Completion Through Nonconvex Optimization

IEEE Journal of Selected Topics in Signal Processing, 2018
This paper studies the multichannel missing data recovery problem when the measurements are generated by a dynamical system. A new model, termed multichannel low-rank Hankel matrices, is proposed to characterize the intrinsic low-dimensional structures in multichannel time series.
Shuai Zhang 0015, Yingshuai Hao, Meng Wang 0003, Joe H. Chow   +3 more
openaire   +1 more source

Nonlinear input-normal realizations based on the differential eigenstructure of hankel operators [PDF]

, 2005
This paper investigates the differential eigenstructure of Hankel operators for nonlinear systems. First, it is proven that the variational system and the Hamiltonian extension with extended input and output spaces can be interpreted as the Gâteaux ...
Fujimoto, K.,, Scherpen, J. M. A., Fujimoto, K., Scherpen, J. M. A.,   +3 more
core   +2 more sources

Overcoming Computational Bottlenecks in Quantum Hydrodynamics: A Volume‐Based Integral Formalism for Spherical Nanoparticles

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
Numerical modeling of mesoscopic material response models that capture the quantum dynamics of electrons does not have to come with discouraging computational bottlenecks. The main message is that through a shift in perspective in modeling toward integral equation methods and exploiting symmetry‐based arguments, it is possible to capture complicated ...
Christos Mystilidis, Christos Tserkezis, Guy A. E. Vandenbosch, N. Asger Mortensen, Xuezhi Zheng   +4 more
wiley   +1 more source

Photonic Doping of Epsilon‐Near‐Zero Bragg Microcavities

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
Photonic doping of an epsilon‐near‐zero (ENZ) Bragg microcavity at optical frequencies induces strong magnetic responses from dielectric inclusions, enabling intense field localization, Purcell enhancement, and tunable hybrid Bragg–Mie modes. The platform supports perfect magnetic conductor and epsilon‐and‐mu‐near‐zero regimes, offering opportunities ...
Ali Panahpour, Jussi Kelavuori, Mikko Huttunen   +2 more
wiley   +1 more source

Subspace-Based SNR Estimation for Underwater Acoustic Communications

IEEE Access
This paper proposes a signal-to-noise power ratio (SNR) estimation method for underwater acoustic environments that combines Hankel matrix transformation, singular value decomposition (SVD), and a Gaussian mixture model (GMM).
Kibum Kim, Sooin Kim, Yongcheol Kim, Hojun Lee   +3 more
doaj   +1 more source

In Situ pH Determination Using 1H‐MRS Acetate Chemical Shift for Noninvasive Postmortem Examinations

NMR in Biomedicine, Volume 39, Issue 7, July 2026.
The chemical‐shift difference between acetate and myo‐inositol measured by MRS enables estimation of pH in the acidic range. Noninvasive pH assessment in forensic investigations is demonstrated in 58 cases and validated by measurements in extracted tissue.
Sabina Frese, Dominic Gascho, Michael J. Thali, Sebastian Kozerke, Niklaus Zoelch   +4 more
wiley   +1 more source

Regularidade de operadores de Wiener-Hopf mais Hankel [PDF]

, 2011
Doutoramento em MatemáticaIn this thesis we consider Wiener-Hopf-Hankel operators with Fourier symbols in the class of almost periodic, semi-almost periodic and piecewise almost periodic functions.
Silva, Anabela de Sousa e
core  

Residual Water Suppression in MRS Using HLSVD With Automatic Component Selection Strategy

NMR in Biomedicine, Volume 39, Issue 7, July 2026.
Residual water signals in magnetic resonance spectroscopy distort baselines and hinder metabolite quantification. We propose an automatic residual water removal method using HLSVD with the metric, termed as residual water to metabolite variance ratio (RWVR), to guide component selection.
Yi‐Ru Lin, Zheng‐De Hong, Shang‐Yueh Tsai   +2 more
wiley   +1 more source

Construction of the nearest nonnegative Hankel matrix for a prescribed eigenpair

Numerical Algorithms
We study the problem of determining whether a prescribed eigenpair $(λ,x)$ can be made an exact eigenpair of a nonnegative Hankel matrix through the smallest possible structured perturbation. The task reduces to check the feasibility of a set of linear constraints that encode both the Hankel structure and entrywise nonnegativity.
Prince Kanhya, Udit Raj
openaire   +3 more sources