Results 61 to 70 of about 711,225 (168)

Human Excreta as a Stable and Important Source of Atmospheric Ammonia in the Megacity of Shanghai.

PLoS ONE, 2015
Although human excreta as a NH3 source has been recognized globally, this source has never been quantitatively determined in cities, hampering efforts to fully assess the causes of urban air pollution.
Yunhua Chang, Congrui Deng, Anthony J Dore, Guoshun Zhuang   +3 more
doaj   +1 more source

Analysis and avoidance method of 5G atmospheric duct interference

Dianxin kexue, 2022
Atmospheric duct effects can produce the remote interference, which will lead to serious problems of the network degradation.Firstly, a detailed analysis of the causes of 5G atmospheric duct interference was achieved through the system principle analysis.Then, a 5G atmospheric duct interference waveform identification algorithm was proposed.Finally ...
Tinglan WANG, Xingzheng LI, Yimin ZUO, Dongchen ZHANG   +3 more
openaire   +2 more sources

Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit

Journal of Combustion, 2020
This study investigates the continuous transition from flame-spreading to stabilized combustion near the blow-off limit in opposed forced flow by using expanding solid fuel duct that makes distribution of oxidizer velocity in the axial direction.
K. Komizu, Y. Saito, A. Tsuji, H. Nagata
doaj   +1 more source

A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation [PDF]

, 2009
The isotopic composition of molecular hydrogen (H₂) produced by photochemical oxidation of methane (CH₄) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H<sub>2 ...
Sub Atmospheric physics and chemistry, M. C. Krol, G. Pieterse, T. Röckmann, Krol, M.C., Pieterse, G., Afd Marine and Atmospheric Research, Marine and Atmospheric Research, Röckmann, T.   +8 more
core   +3 more sources

On the Possibility of Detecting Evaporation Ducts Through GNSS Reflectometry

Remote Sensing
An evaporation duct is a kind of atmospheric event with a refractive index exceeding the curvature of the Earth, which mostly exists on the ocean surface.
Fu Li, Yueqiang Sun, Xianyi Wang, Junming Xia, Feixiong Huang, Qifei Du, Weihua Bai, Zhuoyan Wang, Tongsheng Qiu   +8 more
doaj   +1 more source

A Note on the Distribution of Atmospherically Ducted Signal Power Near the Earth's Surface [PDF]

IEEE Transactions on Communications, 1982
Interference fields caused by low-level atmospheric ducts are of concern at UHF frequencies and above. This note develops a long-term median distribution of received signal power during ducting conditions from observations taken on a 175 km, 5 GHz path in New Jersey in 1966.
openaire   +2 more sources

Validation of Atmospheric Ducts Inversion Using Automatic Identification System Signals at Sea

IET Microwaves, Antennas & Propagation
In order to verify the feasibility of atmospheric duct inversion method using automatic identification system signal in the actual sea area, a sea experiment was carried out.
Wenlong Tang, Hui Hu, Shangfu Liu, Bin Tian   +3 more
doaj   +1 more source

A Reconstruction-Inversion Method of Atmospheric Duct Parameters Using ADS-B Signals Based on Autoencoder and ResNet18

IEEE Access
Low-altitude atmospheric ducts are anomalous atmospheric phenomena in the troposphere, significantly affecting the operation of microwave or ultrashort-wave radio systems.
Mian Wu, Yihao Xu, Yuqiang Zhang, Chen Zhou   +3 more
doaj   +1 more source

Detecting the sensitive area of evaporation duct and evaluating its impact on forecasts of electromagnetic propagation over the South China Sea

Frontiers in Marine Science
Evaporation ducts can significantly modify the atmospheric refractive index profile, leading to errors in electromagnetic (EM) propagation prediction, thereby affecting the reliability of maritime radio communication and radar detection.
Xinyue Zhang, Xinyue Zhang, Xuan Li, Xuan Li, Hao Zhang, Hao Zhang, Xiaolin Zhang   +6 more
doaj   +1 more source

Estimation of surface duct parameters using AIS data based on Bayesian inversion method

Frontiers in Marine Science
Automatic Identification System (AIS) operates within a very high frequency (VHF) maritime mobile band, which could be impacted by surface duct seriously.
Hong-Guang Wang, Li-Jun Zhang, Jie Han, Li-Feng Huang, Qing-Lin Zhu   +4 more
doaj   +1 more source