Results 61 to 70 of about 975,265 (377)
Combustion and performance characteristics of SI engine with bioethanol blended fuels
International Journal of Energy Research, Volume 46, Issue 15, Page 24454-24464, December 2022., 2022 Summary The combustion characteristics of single‐cylinder spark‐ignition (SI) engines with bioethanol blended fuels have been investigated experimentally. It is known that bioethanol (alcohol‐based fuel) offers a range of advantages to be considered as a fuel for SI engines.
Bhaskar Paluri, Dipal Patel
wiley +1 more source
Photonics, 2022 Analytical expressions for the cross-spectral density matrix of a partially coherent twisted Laguerre-Gaussian pulsed (PCTLGP) beam in anisotropic atmospheric turbulence are derived based on the extended Huygens–Fresnel principle.
Ying Xu, Yonggen Xu, Tiejun Wang
doaj +1 more source
Optics Express, 2018 A novel joint atmospheric turbulence (AT) detection and adaptive demodulation technique based on convolutional neural network (CNN) are proposed for the OAM-based free-space optical (FSO) communication.
Jin Li +4 more
semanticscholar +1 more source
Frontiers in Physics, 2023 Although free-space optical communication (FSOC) is a promising means of high data rate satellite-to-ground communication, beam distortion caused by atmospheric optical turbulence remains a major challenge for its engineering applications.
Yalin Li +10 more
doaj +1 more source
Statistics of turbulence profile at Cerro Tololo [PDF]
Mon.Not.Roy.Astron.Soc. 340 (2003) 52, 2002 Results of 3-month continuous monitoring of turbulence profile and seeing at Cerro Tololo (Chile) in May-July 2002 are presented. Some 28000 low-resolution profiles were measured by a new MASS single-star turbulence monitor, accompanied by seeing data from DIMM. The median seeing was 0.95 arcseconds.
arxiv +1 more source
The Atmospheric Boundary Layer and the “Gray Zone” of Turbulence: A Critical Review
Journal of Geophysical Research: Atmospheres, 2020 Recent increases in computing power mean that atmospheric models for numerical weather prediction are now able to operate at grid spacings of the order of a few hundred meters, comparable to the dominant turbulence length scales in the atmospheric ...
Rachel Honnert +9 more
semanticscholar +1 more source
Restoration of atmospheric turbulence-distorted images via RPCA and quasiconformal maps [PDF]
Inverse Problems, 2017 We address the problem of restoring a high-quality image from an observed image sequence strongly distorted by atmospheric turbulence. A novel algorithm is proposed in this paper to reduce geometric distortion as well as space-and-time-varying blur due ...
Chun Pong Lau, Y. Lai, L. Lui
semanticscholar +1 more source
Atmospheric Turbulence-Controlled Cryptosystems
IEEE Photonics Journal, 2021 To overcome the limitations of QKD, post-quantum cryptography, and computational security-based cryptography protocols in this paper, an atmospheric turbulence-controlled cryptosystem is proposed.
Ivan B. Djordjevic
doaj +1 more source
Robust propagation of pin-like optical beam through atmospheric turbulence
APL Photonics, 2019 We design and demonstrate what we called shape-preserving “optical pin beams” (OPBs) that possess stable wavefronts against diffraction and ambient turbulence during free-space long distance propagation.
Ze Zhang +9 more
semanticscholar +1 more source
Atmospheric turbulence profiling with multi-aperture scintillation of a Shack-Hartmann sensor [PDF]
, 2021 Adaptive optics (AO) systems using tomographic estimation of three-dimensional structure of atmospheric turbulence requires vertical atmospheric turbulence profile, which describes turbulence strength as a function of altitude as a prior information. We propose a novel method to reconstruct the profile by applying Multi Aperture Scintillation Sensor ...
arxiv +1 more source