Results 91 to 100 of about 3,062 (211)

Fundamentals of Deep‐Subwavelength Near‐Field Imaging With Hyperbolic Polaritons

Nanophotonics, Volume 15, Issue 8, 24 April 2026.
Hyperbolic polaritons enable deep‐subwavelength near‐field imaging. This work reveals the intrinsic resolution limit of polaritonic imaging by linking it to the linewidth of hyperbolic polariton beams. A negative‐refraction‐based strategy is proposed to achieve scale fidelity under appropriate thickness configurations and to mitigate geometrical ...
Tianran Yu, Zhenyang Cui, Sihao Xia, Zhiwei He, Huaping Wang, Lian Shen, Hongsheng Chen, Yingjie Wu   +7 more
wiley   +1 more source

Non‐Markovian Exceptional Points in Waveguide Quantum Electrodynamics

Advanced Quantum Technologies, Volume 9, Issue 4, April 2026.
Non‐Markovian waveguide‐QED systems exhibit dynamical transitions governed by exceptional points arising from retardation and interference. Giant atoms and spatially separated emitters display oscillatory relaxation and real zeros in the excited‐state amplitude at critical delay times.
Stefano Longhi
wiley   +1 more source

SVD Algorithm in the Application of the MIMO System Model Order Reduction

Journal of Harbin University of Science and Technology, 2017
For linear time invariant high-order system calculation and analysis model is difficult to directly，so we need to study on reduction of the model According to the basic theory of model order reduction Lyapunov equation model order solution to linear time
LU Fang-ming, ZHOU Lin
doaj   +1 more source

MATRIKS HANKEL [PDF]

, 2001
In this paper, we talk about Hankel Operator and Hankel Matrix. Operator Hg:F[z]z-1F[[z-1]] defined by Hg(f)=_(gf) is called the Hankel Operator.
Tjahjana, R. H. (R), Tjahjana, R. Heru
core  

Polynomial-exponential 2D data models, Hankel-block-Hankel matrices and zero-dimensional ideals

, 2011
Subspace-based methods are popular for analysis of two-dimensional data that can be modeled by sums of polynomially modulated exponential (or “polynomial-exponential”) functions.
Usevich, Konstantin
core  

Regularidade de operadores de Wiener-Hopf mais Hankel

, 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  

The Hankel matrix rank theorem revisited

, 2020
© 2017 Elsevier Inc. We give a new short proof of a version of a Hankel matrix rank theorem. That version expresses the rank of H by the smallest possible rank of an infinite Hankel matrix containing H.
Al'pin Y.
core  

RIS-Based DOA Estimation for Communication-Assisted Sensing Systems Under Hardware Impairments

IEEE Open Journal of Vehicular Technology
Reconfigurable intelligent surface (RIS)-based localization has received significant attention in wireless communication systems due to its potential for enabling non-line-of-sight (NLoS) wireless sensing.
Xue Zhang, Ngoc Phuc Le, Mohamed-Slim Alouini   +2 more
doaj   +1 more source

Super resolution DOA estimation with incomplete single snapshot data via matrix completion and compress sensing

MATEC Web of Conferences, 2018
A method of super resolution DOA estimation with incomplete single snapshot data via matrix completion (MC) and compress sensing (CS) is presented. First, the incomplete single snapshot data is reshaped into a low-rank Hankel matrix form and the complete
Zhang Dong, Zhang Qin, Song Baojun, Zheng Guimei, Zhang Yongshun   +4 more
doaj   +1 more source

Numerical Approach for the Frequency-Weighted Hankel-Norm Approximation

, 2001
We derive new projection formulas for the model reduction method based on the frequency-weighted Hankel norm approximation (FWHNA). These formulas extend the applicability of the FWHNA method to frequency weights expressed as antistable right/left ...
Varga, Andras
core