Results 51 to 60 of about 2,208 (153)

An Axiomatic Approach to Mild Distributions

Axioms
The Banach Gelfand Triple (S0,L2,S0′) consists of the Feichtinger algebra S0(Rd) as a space of test functions, the dual space S0′(Rd), known as the space of mild distributions, and the intermediate Hilbert space L2(Rd). This Gelfand Triple is very useful
Hans G. Feichtinger
doaj   +1 more source

SPWVD‐YOLO11 Based Fault Diagnosis for Urban Rail Traction Motor Bearings Under Variable Operating Conditions

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
A bearing fault diagnosis method based on Smooth Pseudo‐Wigner‐Ville Distribution (SPWVD) and YOLO11 is proposed. The method firstly transforms one‐dimensional vibration signals into two‐dimensional feature maps containing time–frequency information through SPWVD, and then extracts and learns features from the feature maps through the YOLO11 deep ...
Hu Cao, Runfang Tong, Qian Wu, Xuhao Zhang, Bin Gou   +4 more
wiley   +1 more source

Hybrid CNN–Transformer Approach for Rotor Interturn Short‐Circuit Fault Detection in Doubly Fed Induction Generators at Synchronous Speed

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This paper proposes a hybrid deep learning method combining convolutional neural networks (CNNs) and transformer architectures for detecting rotor interturn short‐circuit (RITSC) faults in doubly fed induction generators (DFIGs), with a focus on the challenging near‐synchronous speed condition.
Sajad Khoshbakht, SeyedMohammad M. Moosavi, Sérgio M. A. Cruz   +2 more
wiley   +1 more source

Experimental and Mechanistic Study of Multi‐Stage Thermally Coupled Combustion of Trace Diesel and Natural Gas Under Wide Load Range

The Journal of Engineering, Volume 2025, Issue 1, January/December 2025.
This paper addresses the challenges encountered by heavy‐duty engines regarding high‐efficiency combustion across a broad load spectrum. It proposes a multi‐stage thermally coupled combustion strategy that integrates trace diesel ignition with quasi‐homogeneous combustion of natural gas.
Bo Wu, Qiong Xia, Yan Qu, Shan Jiang
wiley   +1 more source

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

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

Decoupling Machine and Operational Variances: A Spectral Attention Framework for Robust Few‐Shot Cross‐Machine Fault Diagnosis

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
Deploying intelligent fault diagnosis models in real‐world industrial settings is severely hampered by a trio of challenges: data scarcity, cross‐machine heterogeneity, and time‐varying operating conditions. Existing domain adaptation methods, which primarily align statistical distributions, often fail because they are physics‐agnostic and implicitly ...
Hao Wei, Chao He, Suyan Liu, Zefeng Song, Feiyu Lu, Young-Jin Cha   +5 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

Decoherence, Correlation, and Unstable Quantum States in Semiclassical Cosmology

, 1994
It is demonstrated that almost any S-matrix of quantum field theory in curved spaces posses an infinite set of complex poles (or branch cuts). These poles can be transformed into complex eigenvalues, the corresponding eigenvectors being Gamow vectors ...
A. Bohm, A. Gangui, A. Vilenkin, A. Vilenkin, B. Birrell, B. Birrell, B. L. Hu, B. L. Hu, E. C. G. Sudarshan, E. Calzetta, E. Calzetta, E. Calzetta, Fernando Lombardo, G. A. Gamow, H. Hochstadt, H. Reichenbach, I. Antoniou, I. Antoniou, I. Antoniou, J. Audretsch, J. Audretsch, J. Halliwell, J. Halliwell, J. P. Paz, L. Parker, L. Parker, M. C. Mackey, M. Castagnino, M. Castagnino, M. Castagnino, M. Castagnino, Mario Castagnino, N. N. Bogolubov, N. N. Lebedev, P. C. W. Davies, R. W. Zwanzig, R. W. Zwanzig, W. G. Unruh   +37 more
core   +1 more source