Results 91 to 100 of about 25,959 (202)
Direction-of-Arrival Estimation in Coprime Array Using the ESPRIT-Based Method
Sensors, 2019 Coprime arrays have shown potential advantages for direction-of-arrival (DOA) estimation by increasing the number of degrees-of-freedom in the difference coarray domain with fewer physical sensors.
Zhen Meng, Weidong Zhou
doaj +1 more source
The Spectra of Large Toeplitz Band Matrices with a Randomly Perturbed Entry [PDF]
, 2001 This report is concerned with the union $sp_{\Omega}^{(j,k)}T_{n}(a)$ of all possible spectra that may emerge when perturbing a large $n \times n$ Toeplitz band matrix $T_{n}(a)$ in the $(j,k)$ site by a number randomly chosen from some set $\Omega$. The
Boettcher, A. +2 more
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Every Matrix is a Product of Toeplitz Matrices [PDF]
Foundations of Computational Mathematics, 2015 18 ...
Ye, Ke, Lim, Lek-Heng
openaire +3 more sources
Journal of Sleep Research, Volume 35, Issue 1, February 2026.ABSTRACT This study investigates the impact of extensive visual procedural training on the temporal organisation of sleep spindles in healthy young adults. We selected 39 participants aged 16–20 and employed high‐density electroencephalography to assess spindle characteristics during two full nights of sleep, with daytime practising in a contour ...
Patrícia Gerván +4 more
wiley +1 more source
Advanced Engineering Research, 2015 The simplest topological properties of the approximate spectrum, namely the connectivity of its complement in the complex plane, are studied. A numerical verification of the lower bounds for the maximum number of the connected components of the limitary ...
Svetlana A. Zolotykh
doaj +1 more source
Around multivariate Schmidt-Spitzer theorem
, 2013 Given an arbitrary complex-valued infinite matrix A and a positive integer n we introduce a naturally associated polynomial basis B_A of C[x0...xn]. We discuss some properties of the locus of common zeros of all polynomials in B_A having a given degree m;
Alexandersson, Per, Shapiro, Boris
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Journal of Forecasting, Volume 45, Issue 1, Page 316-334, January 2026.ABSTRACT In this paper, we study models for stochastic seasonality and compare the well‐known SARIMA models to Seasonal Autoregressive Unit Root Moving Average (SARUMA) models. SARUMA models assume that the polynomial of the stationarizing differencing operator has roots on the unit circle at some seasonal frequencies, while SARIMA models impose roots ...
Evangelos E. Ioannidis +1 more
wiley +1 more source
The asymptotic spectra of banded Toeplitz and quasi-Toeplitz matrices [PDF]
Toeplitz matrices occur in many mathematical, as well as, scientific and engineering investigations. This paper considers the spectra of banded Toeplitz and quasi-Toeplitz matrices with emphasis on non-normal matrices of arbitrarily large order and ...
Beam, Richard M., Warming, Robert F.
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Steady‐State Spread Bounds for Graph Diffusion via Laplacian Regularisation in Networked Systems
IET Networks, Volume 15, Issue 1, January/December 2026.We study how an engineered initial pattern on a fixed network blurs under linear diffusion and provide a steady‐state upper bound on the resulting deviation. The bound cleanly separates an unavoidable floor set by network connectivity and diffusion strength from a design‐controlled term that shrinks when the initial pattern is smoothed with a graph ...
Ardavan Rahimian
wiley +1 more source
A Note On the Rank of the Optimal Matrix in Symmetric Toeplitz Matrix Completion Problem
, 2019 We consider the symmetric Toeplitz matrix completion problem, whose matrix under consideration possesses specific row and column structures. This problem, which has wide application in diverse areas, is well-known to be computationally NP-hard. This note
Xu, Xihong Yan Jiahao Guo Yi
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