Results 81 to 90 of about 13,243 (227)
Rethinking Atmospheric Turbulence Mitigation
CoRR, 2019 State-of-the-art atmospheric turbulence image restoration methods utilize standard image processing tools such as optical flow, lucky region and blind deconvolution to restore the images. While promising results have been reported over the past decade, many of the methods are agnostic to the physical model that generates the distortion.
Nicholas Chimitt +3 more
openaire +2 more sources
Vanishing enstrophy dissipation in two-dimensional Navier--Stokes turbulence in the inviscid limit
, 2006 Batchelor (Phys. Fluids, vol. 12, 1969, p. 233) developed a theory of two-dimensional turbulence based on the assumption that the dissipation of enstrophy (mean-square vorticity) tends to a finite non-zero constant in the limit of infinite Reynolds ...
Tran, Chuong Van +1 more
core +1 more source
Observations of Turbulence in Free Atmosphere by Balloon-Borne Sensors
Sensors, 2018 In recent years, Thorpe analysis has been used to retrieve the characteristics of turbulence in free atmosphere from balloon-borne sensor data. However, previous studies have mainly focused on the mid-high latitude region, and this method is still rarely
Lesong Zhou, Zheng Sheng, Qixiang Liao
doaj +1 more source
Turbulence Imaging Simulation Based on Electrically Tunable Polymer Dispersed Liquid Crystals Cell
Medžiagotyra, 2019 In this study, the scattering properties of polymer dispersed liquid crystals (PDLC) and its optical features for use in turbulence image simulation are presented.
Hui LI +4 more
doaj +1 more source
Scaling properties of velocity and temperature spectra above the surface friction layer in a convective atmospheric boundary layer [PDF]
, 2007 We report velocity and temperature spectra measured at nine levels from 1.42 meters up to 25.7 m over a smooth playa in Western Utah. Data are from highly convective conditions when the magnitude of the Obukhov length (our proxy for the depth of the ...
Clement, R. J. +5 more
core +1 more source
Laser guide stars and turbulence profiling for extremely large telescopes [PDF]
, 2006 The next generation of ground based telescopes, the so-called extremely large telescopes, will offer a significant leap in sensitivity and resolution compared to current telescopes. They also present a range of technical challenges.
Butterley, Timothy
core
The General Circulation of the Tropical Atmosphere and Climate Changes [PDF]
, 2012 I examine the general circulation of the tropical atmosphere and climate changes. First, the response of the zonal surface temperature gradients and zonally asymmetric tropical overturning circulations (Walker circulations) to substantial changes in the ...
Merlis, Timothy Moore
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On the estimation of atmospheric turbulence layers for AO systems [PDF]
In current and next generation of ground telescopes, Adaptive Optics (AO) are employed to overcome the detrimental effects induced by the presence of atmospheric turbulence, that strongly affects the quality of data transmission and therefore limits ...
Cenedese, Angelo +2 more
core
工程科学与技术, 2014 :The key issue of atmosphere turbulence simulation is how to generate multi-layer turbulence phase screen with high precision. Classical spectral inversion method needs to take up lots of computer resources.In this case, it leads to impossible parallel ...
孙治, 秦小林, 冯勇
doaj
, 1959 Some characteristics of turbulence near the ground can begin to be interpreted There is yet little information about others (even near the ground) such as spectra measured along the vertical lines, or cross spectra between two variables. Further, results of turbulence characteristics over water are few and confusing, and no information exists about the
openaire +3 more sources