Results 71 to 80 of about 21,769 (265)

Error estimates between SGD with momentum and underdamped Langevin diffusion

CoRR
Stochastic gradient descent with momentum is a popular variant of stochastic gradient descent, which has recently been reported to have a close relationship with the underdamped Langevin diffusion. In this paper, we establish a quantitative error estimate between them in the 1-Wasserstein and total variation distances.
Guillin, Arnaud, Wang, Yu, Xu, Lihu, Yang, Haoran   +3 more
openaire   +3 more sources

Bioinspired Adaptive Surfaces for Intelligent Liquid Manipulation: Progressing From Passive and Active to Hybrid Strategies

Advanced Materials, EarlyView.
This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao, Yiyuan Zhang, Liqiu Wang, Alan C. H. Tsang   +3 more
wiley   +1 more source

Evolution of OLED Lamination Technology With Development of Display Form Factors

Advanced Materials Technologies, EarlyView.
This review evaluates the evolution of organic light‐emitting diode (OLED) lamination technologies alongside advancing display form factors. It contrasts optically clear adhesives and resins, highlighting uniformity control for rigid screens, bubble‐free optimization for bended architectures, and visible‐light curing for foldable layers.
Kwan‐Young Han, Ji‐Hoon Park
wiley   +1 more source

Countergradient Momentum Transport in Clear Convective Atmospheric Boundary Layers

Journal of Advances in Modeling Earth Systems
The vertical profiles of the wind speed and direction in atmospheric boundary layers are strongly controlled by turbulence. Most global weather forecast and climate models parameterize the vertical transport of horizontal momentum by turbulent eddies by ...
Stephan R. deRoode, Fredrik Jansson, Lydia Mak, Louise Nuijens   +3 more
doaj   +1 more source

Cosmic ray momentum diffusion in the presence of nonlinear Alfvén waves [PDF]

Nonlinear Processes in Geophysics, 1996
The relation between the spatial diffusion coefficient along the magnetic field, kII, and the momentum diffusion coefficient, Dp, for relativistic cosmic ray particles is modelled using Monte Carlo simulations. Wave fields
G. Michałek, M. Ostrowsky
doaj  

A generalized formulation of the dynamic Smagorinsky model

Meteorologische Zeitschrift, 2017
A generalized formulation of the Dynamic Smagorinsky Model (DSM) is proposed as a versatile turbulent momentum diffusion scheme for Large-Eddy Simulations.
Urs Schaefer-Rolffs
doaj   +1 more source

Rotating Fluorescent Nanodiamond Assemblies With Focused Laguerre–Gaussian Beams

Advanced Optical Materials, EarlyView.
Self‐assembled fluorescent nanodiamond clusters are optically trapped and driven into controlled two‐dimensional rotation with Laguerre–Gaussian beams. With localized optical excitation, optically detected magnetic resonance spectra are collected at defined points along the orbit in a uniform external magnetic field.
Adam Stewart, Anthony J. El‐Helou, Ying Zhu, David McGloin, David A. Simpson, Peter J. Reece   +5 more
wiley   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Effects of uncertainties in universal functions, roughness length, and displacement height on the calculation of surface layer fluxes

Meteorologische Zeitschrift, 2000
A sensitivity analysis of the turbulent momentum and sensible heat fluxes as functions of wind speed and temperature gradients in the surface layer was made on the basis of Monin-Obukhov similarity theory.
Tamás Weidinger, Joseph Pinto, László Horváth   +2 more
doaj   +1 more source

Fluid dynamics of charm quarks from heavy to light-ion collisions [PDF]

EPJ Web of Conferences
Heavy quarks are powerful tools to characterize the quark-gluon plasma (QGP) produced in relativistic nuclear collisions. By exploiting a mapping between transport theory and hydrodynamics, we developed a fluiddynamic description of heavy-quark diffusion
Capellino Federica, Dubla Andrea, Facen Rossana, Floerchinger Stefan, Grossi Eduardo, Kirchner Andreas, Masciocchi Silvia   +6 more
doaj   +1 more source