Results 51 to 60 of about 121 (87)

Enhanced Automated Condition Assessment of Induction Motor Bearings: A Novel Approach Using Matrix Pencil Mean Frequency Signal Processing and Multilayer Perceptron Neural Networks

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This figure summarises the proposed fault signature generation method. It provides a high‐level overview of the process, from data collection to signature generation. ABSTRACT Vibration signal analysis plays a vital role in the condition‐based preventive maintenance of induction motor by identifying early signs of motor issues, avoiding costly ...
Abderrzak Laib, Saida Dahmane, Yacine Terriche, Chun‐Lien Su, Hafiz Ahmed, Zakaria Chedjara   +5 more
wiley   +1 more source

Bootstrapping non‐stationary and irregular time series using singular spectral analysis

Journal of Time Series Analysis, Volume 46, Issue 1, Page 81-112, January 2025.
This article investigates the consequences of using Singular Spectral Analysis (SSA) to construct a time series bootstrap. The bootstrap replications are obtained via a SSA decomposition obtained using rescaled trajectories (RT‐SSA), a procedure that is particularly useful in the analysis of time series that exhibit nonlinear, non‐stationary and ...
Don S. Poskitt
wiley   +1 more source

On a Subfamily of Analytic Functions Associated With q‐Sălăgean Operator

Journal of Mathematics, Volume 2025, Issue 1, 2025.
In this article, we study a new subfamily of analytic functions associated with q‐Janowski function using q‐Sălăgean operator. We explore certain properties of the functions belonging to this new class which include sufficient condition, inclusion results, and coefficient estimate bounds for Fekete–Szegö functional. Several consequences of main results
Ihtesham Gul, Mohammed Ali Alamri, Khalida Inayat Noor, Saqib Hussain, Maslina Darus, Saima Noor, R. Sundareswaran   +6 more
wiley   +1 more source

Noncircular coherent signal direction of arrival estimation for coprime array: A subspace‐based interpolation approach

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2726-2736, December 2024.
Our study introduces a non‐circular coherent signal direction‐finding method that effectively addresses array aperture loss in mainstream direction of arrival (DOA) estimation algorithms. By utilising covariance matrix information and employing techniques such as eigenvalue decomposition and nuclear norm minimisation, our approach enhances ...
Zihan Shen, Hao Hu, Jiaqi Li, Xiaofei Zhang   +3 more
wiley   +1 more source

Multiplicative chaos measures from thick points of log‐correlated fields

Communications on Pure and Applied Mathematics, Volume 77, Issue 11, Page 4212-4286, November 2024.
Abstract We prove that multiplicative chaos measures can be constructed from extreme level sets or thick points of the underlying logarithmically correlated field. We develop a method which covers the whole subcritical phase and only requires asymptotics of suitable exponential moments for the field. As an application, we establish that these estimates
Janne Junnila, Gaultier Lambert, Christian Webb   +2 more
wiley   +1 more source

Hermitian–Toeplitz and Hankel determinants for Sakaguchi-type functions defined by a rational function

Ukrains’kyi Matematychnyi Zhurnal
UDC 517.5 We obtain the best possible estimates for the Hermitian–Toeplitz determinant of the third order for a class of starlike functions with respect to a symmetric point associated with a rational function. In addition, we determine the upper bounds for the third Hankel determinants.
Mucahit Buyankara, Murat Çağlar
openaire   +1 more source

On the Critical-Subcritical Moments of Moments of Random Characteristic Polynomials: A GMC Perspective. [PDF]

Commun Math Phys, 2022
Keating JP, Wong MD.
europepmc   +1 more source

Bounds on the second Hankel determinant and Toeplitz determinants of logarithmic coefficients for a class of analytic functions

New Zealand Journal of Mathematics
In this paper, we establish sharp initial bounds for the second Hankel determinant and the second Toeplitz determinant of logarithmic coefficients for the class $\mathcal{R}_{car}$, which consists of functions $f$ that satisfy a specific subordination relationship with a function in the open unit disk $\mathbb{D}$.
Varesha Sharma, Praveen Kumar Chaurasia
openaire   +1 more source

Bordered and Framed Toeplitz and Hankel Determinants with Applications to Integrable Probability

Bordered and framed Toeplitz/Hankel determinants have the same structure as Toeplitz/Hankel determinants except in small number of matrix rows and/or columns. We review these structured determinants and their connections to orthogonal polynomials, collecting well-known and perhaps less well-known results.
Gharakhloo, Roozbeh, Liechty, Karl
openaire   +2 more sources

Determinant formulas for finite Toeplitz plus Hankel matrices with rational symbols

In 1975 K. Michael Day produced an exact formula for the determinants of finite Toeplitz matrices whose symbols are rational. The answer is a sum that involves powers of the roots of the numerator of the symbol and whose coefficients depend on both the roots of the numerator and denominator.
Basor, Estelle, Morrison, Kent E.
openaire   +2 more sources