Results 81 to 90 of about 11,364,385 (285)

Six-dimensional light-front Wigner distributions of the proton

European Physical Journal C: Particles and Fields
We investigate six-dimensional quark Wigner distributions of the proton in a light-front quark spectator-diquark model. Benefiting from the light-front boost-invariant longitudinal variable $$\tilde{z}$$ z ~ , these light-front Wigner distributions ...
Yirui Yang, Tianbo Liu, Bo-Qiang Ma
doaj   +1 more source

Phase-space description of the coherent state dynamics in a small one-dimensional system

Open Physics, 2016
The Wigner-Moyal approach is applied to investigate the dynamics of the Gaussian wave packet moving in a double-well potential in the ‘Mexican hat’ form.
Kaczor Urszula, Klimas Bogusław, Szydłowski Dominik, Wołoszyn Maciej, Spisak Bartłomiej J.   +4 more
doaj   +1 more source

Study on Time-frequency Imaging of Ultrasonic Detection with Phase Shifted Fiber Bragg Grating Sensing

Measurement Science Review, 2023
The influence of the wavelength difference between the laser source and the phase-shifted fiber Bragg grating (PS-FBG) on the intensity of the power demodulation system based on an adjustable laser source was studied experimentally, and the optimum of ...
Meng Lijun, Tan Xin, Yu Quanquan
doaj   +1 more source

Classification of Power Quality Disturbances Using Wigner-Ville Distribution and Deep Convolutional Neural Networks

IEEE Access, 2019
This paper proposes a hybrid approach combining Wigner-Ville distribution (WVD) with convolutional neural network (CNN) for power quality disturbance (PQD) classification.
Kewei Cai, W. Cao, L. Aarniovuori, Hongshuai Pang, Yuanshan Lin, Guofeng Li   +5 more
semanticscholar   +1 more source

Structural Properties of Yukawa One‐Component Plasmas Revisited

Contributions to Plasma Physics, EarlyView.
ABSTRACTYukawa one‐component plasmas are fully described in terms of the Coulomb coupling parameter Γ$$ \Gamma $$ and the screening parameter κ$$ \kappa $$. One of their remarkable properties is the existence of lines of constant effective coupling, Γeff(Γ,κ)$$ {\Gamma}_{\mathrm{eff}}\left(\Gamma, \kappa \right) $$, along which their short‐range ...
Daniels Krimans, Hanno Kählert
wiley   +1 more source

The Wigner Distribution

, 2010
In contrast to classical physics, the language of quantum mechanics involves operators and wave functions (or, more generally, density operators). However, in 1932, Wigner formulated quantum mechanics in terms of a distribution function $W(q,p)$, the marginals of which yield the correct quantum probabilities for $q$ and $p$ separately \cite{wigner ...
openaire   +2 more sources

A Comparative Study of Time-Frequency Representations for Fault Detection in Wind Turbine [PDF]

, 2011
To reduce the cost of wind energy, minimization and prediction of maintenance operations in wind turbine is of key importance. In variable speed turbine generator, advanced signal processing tools are required to detect and diagnose the generator faults ...
CHARPENTIER, Jean-Frederic, G. Barakat, EL BOUCHIKHI, EL HOUSSIN, BENBOUZID, Mohamed, BARAKAT, Georges, V. Choqueuse, Choqueuse, Vincent, V., J.F. Charpentier, El.H. Bouchikhi, M.E.H. Benbouzid, CHOQUEUSE, Vincent   +10 more
core   +1 more source

Kinetic Contribution to the Arbitrary Order Odd Frequency Moments of the Dynamic Structure Factor

Contributions to Plasma Physics, EarlyView.
ABSTRACT An exact expression is derived for the kinetic contribution to the odd (arbitrary order) frequency moments of the dynamic structure factor via a finite summation that features averages of even (all lower orders) powers of the momentum over the exact momentum distribution.
Panagiotis Tolias, Tobias Dornheim, Jan Vorberger   +2 more
wiley   +1 more source

Reweighting Scheme for the Calculation of Grand‐Canonical Expectation Values in Quantum Monte Carlo Simulations With a Fermion Sign Problem

Contributions to Plasma Physics, EarlyView.
ABSTRACT Ab initio path integral Monte Carlo (PIMC) simulations constitute the gold standard for the estimation of a broad range of equilibrium properties of a host of interacting quantum many‐body systems spanning a broad range of conditions from ultracold atoms to warm dense quantum plasmas.
Paul Hamann, Jan Vorberger, Tobias Dornheim   +2 more
wiley   +1 more source

Application of the Wigner distribution to monitoring cutting tool condition [PDF]

This thesis is about the application of the Wigner distribution to cutting tool monitoring and control. After reviewing traditional methods, a new method is proposed.
Zheng, Kougen
core