Results 11 to 20 of about 222 (98)

Time Asymmetric Quantum Mechanics

Symmetry, Integrability and Geometry: Methods and Applications, 2011
The meaning of time asymmetry in quantum physics is discussed. On the basis of a mathematical theorem, the Stone-von Neumann theorem, the solutions of the dynamical equations, the Schrödinger equation (1) for states or the Heisenberg equation (6a) for ...
Arno R. Bohm, Manuel Gadella, Piotr Kielanowski   +2 more
doaj   +1 more source

Learning Metric Fields for Fast Low‐Distortion Mesh Parameterizations

Computer Graphics Forum, Volume 44, Issue 2, May 2025.
Abstract We present a fast and robust method for computing an injective parameterization with low isometric distortion for disk‐like triangular meshes. Harmonic function‐based methods, with their rich mathematical foundation, are widely used. Harmonic maps are particularly valuable for ensuring injectivity under certain boundary conditions. In addition,
G. Fargion, O. Weber
wiley   +1 more source

Arithmetic Satake compactifications and algebraic Drinfeld modular forms

Journal of the London Mathematical Society, Volume 111, Issue 4, April 2025.
Abstract In this article, we construct the arithmetic Satake compactification of the Drinfeld moduli schemes of arbitrary rank over the ring of integers of any global function field away from the level structure, and show that the universal family extends uniquely to a generalized Drinfeld module over the compactification.
Urs Hartl, Chia‐Fu Yu
wiley   +1 more source

Measures and operators associated with Parseval distribution frames

Frontiers in Physics
Continuing the study by Tschinke et al. (2019), we examine further aspects of distribution frames (namely, Gel’fand and Parseval), particularly regarding those that are more relevant for applications in quantum physics.
Camillo Trapani, Francesco Tschinke
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

Method of intermediate problems in the Fröhlich polaron model

Condensed Matter Physics, 2009
Method of intermediate problems in the theory of linear semi-bounded self-adjoint operators on rigged Hilbert space was applied to the investigation of the ground state energy of the Fröhlich polaron model. It was shown that various infinite sequences of
A.V. Soldatov
doaj   +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

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

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