Results 51 to 60 of about 1,285,093 (191)

Using a modified DNDC biogeochemical model to optimize field management of a multi-crop (cotton, wheat, and maize) system: a site-scale case study in northern China [PDF]

Biogeosciences, 2019
It is still a severe challenge to optimize the field management practices for a multi-crop system when simultaneously aiming at yield sustainability and minimum negative impacts on climate as well as atmosphere and water quality.
W. Zhang, C. Liu, X. Zheng, X. Zheng, K. Wang, F. Cui, F. Cui, R. Wang, S. Li, S. Li, Z. Yao, J. Zhu   +11 more
doaj   +1 more source

Boundary layer control for airships [PDF]

, 1975
An investigation is summarized of the aerodynamic principle of boundary layer control for nonrigid LTA craft. The project included a wind tunnel test on a BLC body of revolution at zero angle of attack.
Pake, F. A., Pipitone, S. J.
core   +1 more source

The monsoon effect on energy and carbon exchange processes over a highland lake in the southwest of China [PDF]

Atmospheric Chemistry and Physics, 2018
Erhai Lake is a subtropical highland shallow lake on the southeast margin of the Tibetan Plateau, which is influenced by both South Asian and East Asian summer monsoons.
Q. Du, H. Liu, H. Liu, L. Xu, Y. Liu, Y. Liu, L. Wang   +6 more
doaj   +1 more source

A Novel Ultra-Short-Term PV Power Forecasting Method Based on a Temporal Attention-Variable Parallel Fusion Encoder Network

Energies
Accurate photovoltaic (PV) power forecasting is critical for the stable operation of power systems. Existing methods rely solely on historical data, which significantly decline in forecasting accuracy at 3–4 h ahead.
Jinman Zhang, Zengbao Zhao, Rongmei Guo, Xue Hu, Tonghui Qu, Chang Ge, Jie Yan   +6 more
doaj   +1 more source

Vertically resolved characteristics of air pollution during two severe winter haze episodes in urban Beijing, China [PDF]

Atmospheric Chemistry and Physics, 2018
We conducted the first real-time continuous vertical measurements of particle extinction (bext), gaseous NO2, and black carbon (BC) from ground level to 260 m during two severe winter haze episodes at an urban site in Beijing, China.
Q. Wang, Y. Sun, Y. Sun, Y. Sun, W. Xu, W. Xu, W. Du, W. Du, L. Zhou, G. Tang, C. Chen, X. Cheng, X. Zhao, D. Ji, T. Han, T. Han, Z. Wang, J. Li, Z. Wang, Z. Wang, Z. Wang   +20 more
doaj   +1 more source

On optical imaging through aircraft turbulent boundary layers [PDF]

, 1980
Optical resolution quality as affected by aircraft turbulent boundary layers is analyzed. Wind-tunnel data was analyzed to obtained the variation of boundary layer turbulence scale length and mass density rms fluctuations with Mach number.
Sutton, G. W.
core   +1 more source

Characteristics and Source Apportionment of Metallic Elements in PM_2.5 at Urban and Suburban Sites in Beijing: Implication of Emission Reduction

Atmosphere, 2019
To gain insights into the impacts of emission reduction measures on the characteristics and sources of trace elements during the 2014 Asia-Pacific Economic Cooperation (APEC) summit, PM2.5 samples were simultaneously collected from an urban site and a ...
Miaoling Li, Zirui Liu, Jing Chen, Xiaojuan Huang, Jingyun Liu, Yuzhu Xie, Bo Hu, Zhongjun Xu, Yuanxun Zhang, Yuesi Wang   +9 more
doaj   +1 more source

Boundary layer emission in luminous LMXBs

, 2005
We show that aperiodic and quasiperiodic variability of bright LMXBs - atoll and Z- sources, on ~sec - msec time scales is caused primarily by variations of the boundary layer luminosity.
Gilfanov, M., Revnivtsev, M.
core   +1 more source

PM2.5 Characteristics and Regional Transport Contribution in Five Cities in Southern North China Plain, During 2013–2015

Atmosphere, 2018
PM2.5 data from major cities in the southern North China Plain during 2013–2015 were comprehensively analyzed relative to variation features, meteorology effects, and regional transport contributions.
Lili Wang, Wenjie Li, Yang Sun, Minghui Tao, Jinyuan Xin, Tao Song, Xingru Li, Nan Zhang, Kang Ying, Yuesi Wang   +9 more
doaj   +1 more source

Boundary Layer

, 2022
AbstractThe Prandtl’s equations for laminar boundary layer are obtained via dimensional analysis. The case of the flat plate is treated as a suitable example for the development of the boundary layer on a simple geometry. Various thicknesses are introduced. The integration of Prandtl’s equation across the boundary layer produces the von Kármán integral
openaire   +1 more source