Results 51 to 60 of about 77,145 (154)

Spectral Decomposition of the Weinstein Laplacian and Its Application to the Associated Heat Transform

International Journal of Mathematics and Mathematical Sciences, Volume 2025, Issue 1, 2025.
For the Weinstein Laplacian considered on the Hilbert space which makes it a self‐adjoint operator, the Von Neumann spectral decomposition is given. As applications, a new integral representation for the Weinstein heat kernel is given. Also, it is proved that the spectrum of the semigroup associated with the Weinstein Laplacian is reduced to its ...
Abdelilah El Mourni, Nour Eddine Askour, Imane El Yazidi, Muhammad Ahsan   +3 more
wiley   +1 more source

Metal Painting by Plasma Jet

Advanced Materials Interfaces, Volume 11, Issue 25, September 3, 2024.
Highly adhesive electrically conductive metal track printed on dielectrics using atmospheric pressure plasma microjet through a rapid, single‐step process. Abstract Conducting metal interconnections are essential to link electronic components or multiple circuits for electronic device fabrication.
Francis Lockwood Estrin, Oliver S.J. Hagger, M. Emre Sener, Daren J. Caruana   +3 more
wiley   +1 more source

Axioms for the category of Hilbert spaces and linear contractions

Bulletin of the London Mathematical Society, Volume 56, Issue 4, Page 1532-1549, April 2024.
Abstract The category of Hilbert spaces and linear contractions is characterised by elementary categorical properties that do not refer to probabilities, complex numbers, norm, continuity, convexity or dimension.
Chris Heunen, Andre Kornell, Nesta van der Schaaf   +2 more
wiley   +1 more source

On the mean value of the energy for resonant states

, 2000
In this work we discuss possible definitions of the mean value of the energy for a resonant (Gamow) state. The mathematical and physical aspects of the formalism are reviewed.
Antoniou, Antoniou, Beggren, Berggren, Bohm, Bohm, Bohm, Bollini, Bollini, Castagnino, Castagnino, Curuchet, Fonda, Gadella, Gadella, Gadella, Gadella, Gamow, Gyarmati, Hasumi, Liotta, Lovas, M Gadella, Nakanishi, O Civitarese, Petroski, R.Id Betan, Sebastião e Silva, van Winter   +28 more
core   +1 more source

Rolling bearing weak fault detection using transient structure‐optimal VMD and adaptive group sparse coding

IET Science, Measurement &Technology, Volume 18, Issue 2, Page 86-102, March 2024.
The contributions of this paper are mainly reflected in: (1) A method for determining the modes number of VMD using SVS technology is proposed, which can effectively avoid the shortcomings of the optimization algorithm. (2) The TSM index is established to describe the transient structure of bearing fault signals, and the balance factor selection based ...
Xing Yuan, Hui Liu, Huijie Zhang
wiley   +1 more source

A p$p$‐adic approach to the existence of level‐raising congruences

Proceedings of the London Mathematical Society, Volume 128, Issue 2, February 2024.
Abstract We construct level‐raising congruences between p$p$‐ordinary automorphic representations, and apply this to the problem of symmetric power functoriality for Hilbert modular forms. In particular, we prove the existence of the nth$n\text{th}$ symmetric power lift of a Hilbert modular eigenform of regular weight for each odd integer n=1,3,⋯,25$n =
Jack A. Thorne
wiley   +1 more source

Hierarchical Deep Learning for Bearing Fault Detection in BLDC Motors Using Time‐Frequency Analysis

Journal of Electrical and Computer Engineering, Volume 2024, Issue 1, 2024.
This paper presents new hierarchical image‐based time‐frequency convolutional neural network (HTFICNN) for sorted bearing fault detection in brushless DC (BLDC) motors. The HTFICNN combines three different time‐frequency visualisation methods: scalogram, spectrogram, and Hilbert spectrum for the transformation of current and vibration signals into time‐
Ahmed K. Ali, Wathiq Rafa Abed, Antonio J. Marques Cardoso   +2 more
wiley   +1 more source

Effectiveness of Drive‐By Monitoring in Short‐Span Bridges: A Real‐Scale Experimental Evaluation

Structural Control and Health Monitoring, Volume 2024, Issue 1, 2024.
This paper experimentally assesses the efficacy of the indirect Structural Health Monitoring (iSHM) framework on a full‐scale short‐span bridge of nine meters long, using an instrumented vehicle with non‐negligible mass with respect to the mass of the bridge.
Kyriaki Gkoktsi, Flavio Bono, Daniel Tirelli, Andrea Del Grosso   +3 more
wiley   +1 more source

Rigged Hilbert Space Approach for Non-Hermite Systems with Positive Definite Metric

, 2022
We investigate Dirac's bra-ket formalism based on a rigged Hilbert space for a non-Hermite quantum system with a positive-definite metric. First, the rigged Hilbert space, characterized by positive-definite metric, is established.
Ohmori, Shousuke, Takahashi, Junichi
core  

Research on the Application of Variational Mode Decomposition Optimized by Snake Optimization Algorithm in Rolling Bearing Fault Diagnosis

Shock and Vibration, Volume 2024, Issue 1, 2024.
The rolling bearing is one of the commonly used mechanical components in rotating machinery, and its health directly affects the normal operation of equipment. However, the fault signal of rolling bearing is susceptible to noise interference, which makes it difficult to extract the fault characteristics of the rolling bearing and thus affects the ...
Houxin Ji, Ke Huang, Chaoquan Mo, Giorgio Dalpiaz   +3 more
wiley   +1 more source