Results 101 to 110 of about 16,328 (286)

ParamNet: A Physics‐Guided Deep Learning Framework for Intelligent Self‐Inversion of Vacuum Optical Levitation Systems

Advanced Intelligent Systems, EarlyView.
A physics‐guided deep learning framework, ParamNet, is introduced for the intelligent self‐inversion of vacuum optical tweezers. By fuzing dual‐branch time–frequency features with physical dynamical constraints, it achieves high‐accuracy calibration of trap parameters from short‐window, low‐frequency trajectories, outperforming traditional methods ...
Qi Zheng, Wenfeng Fan, Feng Li, Jian Wu, Wei Quan   +4 more
wiley   +1 more source

Existence and Stability of Ulam–Hyers and Generalized Ulam–Hyers for the Generalized Langevin–Sturm–Liouville Equation Involving Generalized Liouville–Caputo Type

Journal of Mathematics
This paper focuses on investigating the existence, uniqueness, and stability of Ulam–Hyers (U-H) and generalized Ulam–Hyers (G-U-H) solutions for the generalized Langevin–Sturm–Liouville equation, which involves generalized Liouville–Caputo derivatives ...
Muthaiah Subramanian, Bundit Unyong, Muath Awadalla   +2 more
doaj   +1 more source

Lattice Boltzmann-Langevin Equations

, 1993
Intrinsic fluctuations around the solution of the lattice Boltzmann equation are described or modeled by addition of a white Gaussian noise source. For stationary states a fluctuation-dissipation theorem relates the variance of the fluctuations to the linearized Boltzmann collision operator and the pair correlation function.
Dufty, J.W., Ernst, M.H.
openaire   +3 more sources

Boltzmann-Langevin Equation [PDF]

, 1976
We have studied that the Fox-Uhlenbeck Ansatz, which expresses how the correlation function of random force is related to the collision operator, can be derived from Mori theory which is a microscopic theory of the Boltzmann-Langevin equation with its ...
福山, 豊
core  

Surface Charges Guided Quasi‐TEM‐mode Microwave Propagation along Dielectric Nanowire

Advanced Physics Research, EarlyView.
According to Maxwell's equations, a single‐conductor transmission line cannot allow TEM‐mode electromagnetic wave propagation, however, this is based upon the assumption that dielectric material is isolated from the environment. In practice, surface electrostatic charges widely existed in nano‐materials with large surface‐to‐volume ratio.
BoYan Xu, Kaibo Zhang, Haojie Gao, Zhiyuan Gao, Kai Wang, Lihuan Zhao, Qi Yang, Bifeng Cui   +7 more
wiley   +1 more source

Assessing the suitability of the Langevin equation for analyzing measured data through downsampling

Journal of Physics: Complexity
The measured time series from complex systems are renowned for their complex stochastic behavior, characterized by random fluctuations stemming from external influences and nonlinear interactions.
Pyei Phyo Lin, Matthias Wächter, Joachim Peinke, M Reza Rahimi Tabar   +3 more
doaj   +1 more source

On the generalised Langevin equation for simulated annealing [PDF]

, 2020
In this paper, we consider the generalised (higher order) Langevin equation for the purpose of simulated annealing and optimisation of nonconvex functions.
Pavliotis, Grigorios A, Kantas, Nikolas, Chak, Martin   +2 more
core  

Langevin equation for systems with a preferred spatial direction [PDF]

, 2016
In this paper, we generalize the theory of Brownian motion and the Onsager–Machlup theory of fluctuations for spatially symmetric systems to equilibrium and nonequilibrium steady-state systems with a preferred spatial direction, due to an external force.
Belousov, Roman, Rondoni, Lamberto, Cohen, E. G. D., Cohen, E.G.D.   +3 more
core   +1 more source

Quantum Heat Current in Terahertz‐Driven Phonon Systems

Advanced Physics Research, EarlyView.
We develop a quantum mechanical description of ultrafast thermodynamics on the example of a laser‐excited phonon mode. We show that the resulting quantum heat current exhibits non‐Markovian dynamics, which can be controlled by the pulse length. ABSTRACT The advent of high‐intensity ultrafast laser pulses has opened new opportunities for controlling and
Yulong Qiao, R. Matthias Geilhufe
wiley   +1 more source

Stochastic cloaking: Concealing a region from diffusive particles

Physical Review Research
We introduce “stochastic cloaking,” where a region of space is concealed from an ensemble of diffusing particles whose individual trajectories are governed by a stochastic (Langevin) equation.
Connor Roberts, Ziluo Zhang, Helder Rojas, Stefano Bo, Carlos Escudero, Sébastien Guenneau, Gunnar Pruessner   +6 more
doaj   +1 more source