Results 21 to 30 of about 460,569 (242)

Influences of the state of ionospheric background on ionospheric heating effects

Annals of Geophysics, 2014
According to the well-performed ionospheric heating experiments at Arecibo in the low latitudes as well as at Tromsø in the high latitudes, the large-scale modification effects are simulated under an assumption of equivalent conditions, i.e., with the ...
Shuji Hao, Li Qingliang, Che haiqin, Yang Jutao, Yan Yubo, Wu Zhensen, Xu Zhenwen   +6 more
doaj   +1 more source

Weight Loss Function for the Cooperative Inversion of Atmospheric Duct Parameters

Atmosphere, 2022
Low-altitude atmospheric ducts are abnormal atmospheric phenomena in the troposphere, impacting the operation of microwave or ultrashort wave radio systems.
Jie Han, Jia-Ji Wu, Hong-Guang Wang, Qing-Lin Zhu, Li-Jun Zhang, Chao Zhang, Qian-Nan Wang, Hui Zhao   +7 more
doaj   +1 more source

A Classifying-Inversion Method of Offshore Atmospheric Duct Parameters Using AIS Data Based on Artificial Intelligence

Remote Sensing, 2022
Atmospheric duct parameters inversion is an important aspect of microwave-band radar and communication system performance evaluation. AIS (Automatic Identification System) is one of the signal sources used for atmospheric duct parameters inversion ...
Jie Han, Jiaji Wu, Lijun Zhang, Hongguang Wang, Qinglin Zhu, Chao Zhang, Hui Zhao, Shoubao Zhang   +7 more
doaj   +1 more source

Uncertainty propagation or box propagation

Mathematical and Computer Modelling, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Barrio, R., Rodríguez, M., Abad, A., Serrano, S.   +3 more
openaire   +2 more sources

Machine Learning-Based Estimation of foF2 and MUF(3000)F2 Using GNSS Ionospheric TEC Observations

Remote Sensing
This study developed machine learning models using different algorithms, including support vector machine (SVM), random forest (RF), and backpropagation neural network (BPNN), to estimate the critical frequency of the F2 layer (foF2) and the maximum ...
Yuhang Zhang, Ming Ou, Liang Chen, Yi Hao, Qinglin Zhu, Xiang Dong, Weimin Zhen   +6 more
doaj   +1 more source

Physical Model of D-Region Ionosphere and Preliminary Comparison with IRI and Data of MF Radar at Kunming

Atmosphere, 2023
Based on the ion continuity equation solved under chemical equilibrium, a physical model of the D-region ionosphere (60–90 km) is established. The model involves 145 ion chemical reactions and includes 23 kinds of positive ions, 11 kinds of negative ions,
Mengyan Zhu, Tong Xu, Shuji Sun, Chen Zhou, Yanli Hu, Shucan Ge, Na Li, Zhongxin Deng, Yuqiang Zhang, Xiaolei Liu   +9 more
doaj   +1 more source

Feasibility Study of Microwave Radiometer Neural Network Modeling Method Based on Reanalysis Data

Atmosphere
To address the challenge of microwave radiometer modeling in regions lacking radiosonde data, this study proposes a neural network retrieval method based on high-resolution the Final Reanalysis (FNL) reanalysis data and validates its feasibility.
Xuan Liu, Qinglin Zhu, Xiang Dong, Houcai Chen, Tingting Shu, Wenxin Wang, Bin Xu   +6 more
doaj   +1 more source

Study on the layered dusty plasma structures in the summer polar mesopause [PDF]

Annales Geophysicae, 2010
Traditional hydrodynamic equations are adopted to build a one-dimensional theoretical model to study the effect of gravity wave on layered dusty plasma structures formation and evolution near the polar summer mesospause region associated with polar ...
Hui Li, Jian Wu, Jun Wu, Zheng-Wen Xu, Bin Xu   +4 more
doaj   +1 more source

Localization of Multiple GNSS Interference Sources Based on Target Detection in C/N₀ Distribution Maps

Remote Sensing
The localization of multiple interference sources in Global Navigation Satellite Systems (GNSS) can be achieved using carrier-to-noise ratio (C/N0) information provided by GNSS receivers, such as those embedded in smartphones.
Qidong Chen, Rui Liu, Qiuzhen Yan, Yue Xu, Yang Liu, Xiao Huang, Ying Zhang   +6 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source