Results 21 to 30 of about 293,197 (180)

Experimental Analysis of Atmospheric Ducts and Navigation Radar Over-the-Horizon Detection

open access: yesRemote Sensing, 2022
Since the height of sea detection radar antenna and ship targets is relatively low, it is generally believed that its over-the-horizon detection is mainly caused by the evaporation duct at sea.
Li-Feng Huang   +7 more
doaj   +1 more source

A Comparison of the Machine Learning Algorithm for Evaporation Duct Estimation

open access: yesRadioengineering, 2013
In this research, a comparison of the relevance vector machine (RVM), least square support vector machine (LSSVM) and the radial basis function neural network (RBFNN) for evaporation duct estimation are presented.
C. Yang
doaj   +1 more source

NWPP-EDH: Numerical weather prediction products evaporation duct regional prediction model

open access: yesFrontiers in Earth Science, 2023
The evaporation duct is a special atmospheric stratification that can affect the propagation path of electromagnetic waves at sea, thus it is crucial for the ability of the radio communication systems.
Xingyu Chai   +5 more
doaj   +1 more source

Atmospheric Ducts and Their Electromagnetic Propagation Characteristics in the Northwestern South China Sea

open access: yesRemote Sensing, 2023
The propagation of electromagnetic waves beyond the line of sight can be caused by atmospheric ducts, which are significant concerns in the fields of radar and communication.
Ning Yang, Debin Su, Tao Wang
doaj   +1 more source

Performance analysis of code division multiplexing communication under evaporation duct environment

open access: yesFrontiers in Signal Processing, 2022
The evaporation duct is an effective means for realizing non-line-of-sight (NLOS) wireless transmission over the sea. However, the effects of marine weather conditions on electromagnetic propagation have rarely been studied.
Wenjing Liu   +4 more
doaj   +1 more source

Evaporation characteristics during decompression of liquified CO2 from a conical-shaped vessel

open access: yesResults in Engineering, 2021
Safe transport of pressurized CO2 requires a profound knowledge of the processes' effect during the phase transition on catastrophic failure of a tanker filled with liquid CO2.
Osama M. Ibrahim   +3 more
doaj   +1 more source

MACHINE LEARNING APPROACH FOR EVAPORATION DUCT NOWCAST [PDF]

open access: yes, 2021
The Evaporation Duct Height (EDH) and Strength (EDS) are properties of the evaporation duct that affects electromagnetic (EM) signal propagation close to the air-sea interface.
Yanez, Josue F.
core   +2 more sources

Optimization design of duct fan and evaporator module in refrigeration system with heat exchange and fan power

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2021
Since the evaporator system has been wildly applied in industry, its operating performance needs to be optimized to reduce energy consumption. Considering the evaporator, duct and fan as basic module, the matching relationship of these components must be
Qingdi KE   +4 more
doaj   +1 more source

Long-term over-the-horizon microwave channel measurements and statistical analysis in evaporation ducts over the Yellow Sea

open access: yesFrontiers in Marine Science, 2023
Maritime high-speed over-the-horizon wireless communication is realizable through evaporation ducts. Detailed measurement, analysis, and modeling of duct channels are essential for application of this communication technique.
Shuwen Wang   +21 more
doaj   +1 more source

A New Model of the Oceanic Evaporation Duct [PDF]

open access: yesJournal of Applied Meteorology, 1997
Failure to consider anomalous propagation of microwave radiation in the troposphere may result in erroneous meteorological radar measurements. The most commonly occurring anomalous propagation phenomenon over the ocean is the evaporation duct. The height of this duct is dependent on atmospheric variables and is a major input to microwave propagation ...
Steven M. Babin   +2 more
openaire   +1 more source

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