Results 11 to 20 of about 1,162 (172)

Impact of Typhoon on Evaporation Duct in the Northwest Pacific Ocean

IEEE Access, 2019
Evaporation duct is a layer above the ocean surface due to the inherent humidity inversion at the air-sea boundary layer. The formation of the duct depends on meteorological factors near the ocean surface and is affected by weather process above the ...
Yixin Yang, Yang Shi, Kunde Yang
exaly   +3 more sources

XGB Model : Research on Evaporation Duct Height Prediction Based on XGBoost Algorithm [PDF]

Radioengineering, 2020
Evaporation duct is a specific atmospheric structure at sea, which has an important influence on the propagation path of electromagnetic waves (EW).
W. P. Zhao, J. Li, J. Zhao, D. Zhao, J. Lu, X. Wang   +5 more
doaj   +3 more sources

A Multi-Dimensional Deep-Learning-Based Evaporation Duct Height Prediction Model Derived from MAGIC Data

Remote Sensing, 2022
The evaporation duct height (EDH) can reflect the main characteristics of the near-surface meteorological environment, which is essential for designing a communication system under this propagation mechanism. This study proposes an EDH prediction network
Cheng Yang, Jian Wang, Yafei Shi
exaly   +3 more sources

Analysis and Research on Chaotic Dynamics of Evaporation Duct Height Time Series with Multiple Time Scales

Atmosphere, 2022
The evaporation duct is a particular type of atmospheric structure that always appears on the open ocean. Predicting the evaporation duct height (EDH) accurately and in a timely manner is of great significance for the practical application of marine ...

exaly   +3 more sources

A New Diagnostic Model and Improved Prediction Algorithm for the Heights of Evaporation Ducts

Frontiers in Earth Science, 2020
This paper develops a new method for the diagnosis and prediction of the evaporation duct heights on the sea, which has certain reference significance for the study of the evaporation ducts.
Yanbo Mai, Zheng Sheng, Zheng Sheng, Hanqing Shi, Chaolei Li, Lihang Liu, Qixiang Liao, Wei Zhang, Shudao Zhou, Shudao Zhou   +9 more
doaj   +2 more sources

Variability of Silver Fir Needle (Abies alba Mill.) Anatomical Features in the Southeast Europe Natural Populations [PDF]

Plants
The survival of marginal/peripheral silver fir (Abies alba Mill.) populations in the broader region of Southeast Europe is endangered due to climate change and population decline. This study aimed to determine the level and pattern of variability for the
Vladan Popović, Aleksandar Lučić, Ljubinko Rakonjac, Aleksandar Vemić, Sanja Jovanović, Biljana M. Nikolić, Danijela Miljković   +6 more
doaj   +2 more sources

Anomalies and Recovery of Evaporation Ducts Induced by Typhoons in the Northwest Pacific

Geophysical Research Letters
Despite widespread attention on tropical cyclone (TC)‐induced cold wakes, the dynamic recovery of evaporation duct height (EDH) post‐typhoon remains unclear.
Xuhang Li, Xiaoping Cheng, Jiayuan Zhang, Jianfang Fei, Xiaogang Huang   +4 more
doaj   +2 more sources

EDH-STNet: An Evaporation Duct Height Spatiotemporal Prediction Model Based on Swin-Unet Integrating Multiple Environmental Information Sources

Remote Sensing
Given the significant spatial non-uniformity of marine evaporation ducts, accurately predicting the regional distribution of evaporation duct height (EDH) is crucial for ensuring the stable operation of radio systems.
Yiwen Wei, Lixin Guo, Guo Xiangming
exaly   +3 more sources

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

Remote 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

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

Remote 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, Cheng-Guo Liu, Hong-Guang Wang, Qing-Lin Zhu, Li-Jun Zhang, Jie Han, Yu-Sheng Zhang, Qian-Nan Wang   +7 more
doaj   +1 more source