Results 131 to 140 of about 293,197 (180)

Application of Laser Technology in Evaporation Duct Detection

Applied Mechanics and Materials, 2011
Aiming at how to detect evaporation duct environment accurately in real time, method of detecting atmospheric duct by using laser technique was put forward. From the model of air refractive index of radar band, theoretical relationship between laser scattering properties of aerosol over the ocean and vertical change characteristics of the air humidity ...
Le Dong Wang, Jian Gan Wang, Tao Liu
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Research on the Microwave Propagation in the Evaporation Duct with Obstacles

Advanced Materials Research, 2011
The influence of the microwave propagation in the evaporation duct is studied by solving wide angle parabolic equation using Fast-Fourier transform method. Then, the result under smooth surface is compared with the simple and complex obstacle on the surface. It is shown that the propagation loss of electromagnetic wave will increase in evaporation duct
Guang Cheng Li, Li Xin Guo, Tian Tian Zhang   +2 more
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A Simulated and Experimental Analysis of Evaporation Duct Effects on Microwave Communications in the Irish Sea

IEEE Transactions on Antennas and Propagation, 2022
This paper presents a simulated and experimental analysis of the effects of the evaporation duct on microwave propagation in the Irish Sea. The evaporation duct is a phenomenon that occurs almost permanently over all the world’s oceans and allows ...
Luke Robinson, Thomas Newe, Daniel Toal
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Evaporation-Induced Clogging of an Artificial Sweat Duct

ACS Applied Materials & Interfaces, 2020
Metal-based antiperspirants have been in use for centuries; however, there is an increasing consumer demand for a metal-free alternative that works effectively. Here, we develop an artificial sweat duct rig and demonstrate an alternative, metal-free approach to antiperspiration.
Venkata Yashasvi Lolla, Pranav Shukla, Stevan D. Jones, Jonathan B. Boreyko   +3 more
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Model of evaporation duct

2018 Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology (USBEREIT), 2018
This paper investigates the phenomenon of an evaporation duct and the possibility of waves to propagate inside it. This phenomenon arises as a result of permittivity gradient in the space above the water surface. The model representing the evaporation duct as a multi-layer structure is suggested.
Denis Serebriakov, Renat Abdullin
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Evaporation Duct Refractivity Profile

2006 IEEE Antennas and Propagation Society International Symposium, 2006
This paper discusses the principles of evaporation duct refractivity profile estimation using bulk meteorological measurements. Four prevailing models among a number of developed ones were examined. Simulation results were compared with direct refractometric measurements.
Iu. Levadnyi, V. Ivanov
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Simulation of the effects of evaporation ducts on maritime wireless communication

Wireless Networks, 2021
This paper describes a tool created to simulate the effects of evaporation ducts on wireless communication networks which are close to the sea surface. The tool is an extension of the ns-3 network simulator and implements two propagation loss models: Two Ray, which models reflection effects; and Three Ray, which models the effects of both reflection ...
Victor Santos Cruz, Flávio Assis 0001, Leizer Schnitman   +2 more
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Statistical assessment of evaporation duct propagation

IEEE Transactions on Antennas and Propagation, 1990
Over-the-horizon propagation from 0.6 to 18 GHz is presented in the form of accumulated frequency distributions of path loss, showing the comparisons between theory and two measurement programs. The path-loss theory is based on waveguide solutions for a family of refractivity/height profiles characterized by evaporation duct height in the range of 1 to
H. Hitney, R. Vieth
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Evaporation Duct Refractivity Profile Models

2006 European Microwave Conference, 2006
Four most prevailing models for evaporation duct refractivity profile calculation based on the Monin-Obukhov similarity theory have been examined. The results of computations have been compared with the experimental data obtained by us during two marine expeditions.
Iu. Levadnyi, V. Ivanov, V. Shalyapin
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Uncertainty quantification of propagation in evaporation ducting

2016 URSI International Symposium on Electromagnetic Theory (EMTS), 2016
The Fourier split-step method is used for solving parabolic equations in, for example, computational electromagnetics. In this paper we develop a spectral based Fourier split-step method that will take a limited degree of information with regard to the refractive index of the atmosphere into account.
M. Enstedt, N. Wellander
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