Results 71 to 80 of about 293,197 (180)

Uncertainty Quantification and Global Sensitivity Analysis for Radio Wave Propagation in Evaporation Duct

Remote Sensing
Accurate prediction of radio wave propagation in evaporation ducts is critical for radar systems but faces significant environmental uncertainties. This study presents an uncertainty quantification and global sensitivity analysis framework comparing ...
Mingjian Li, Liguo Liu
doaj   +1 more source

Analytical modelling of sound transmission in a lined duct

, 2013
The focus of this thesis is on the prediction of sound attenuation through a lined duct, based on a mathematical model. Ducts with a single section as well as multi-segmented sections are discussed. The duct of interest has a rectangular cross-section as
Ramli, Nabilah binti
core   +1 more source

On the Evaporation Duct for Inhomogeneous Conditions in Coastal Regions

Journal of Applied Meteorology and Climatology, 2007
Abstract Evaporation ducts are ubiquitous phenomena over the oceans, and they are responsible for much of the over-the-horizon propagation occurring with millimeter and microwave radars. The height of the evaporation duct depends on meteorological parameters, most notably air and water temperature and relative humidity.
openaire   +1 more source

Implications of anomalous propagation in the evaporation duct for radars at X and Ku band

, 2003
The radio refractive index of the atmosphere is governed by the combination of atmospheric temperature, pressure and humidity. Over oceans, humidity gradients can cause an effect known as the evaporation duct.
Kerans, Andrew J., Woods, Graham S., Hermann, John A., Kulessa, Andy S.   +3 more
core   +1 more source

Exploration of Convergence Point Characteristics in Near-Sea-Surface Wireless Power Transfer

Applied Sciences
This study investigates the enhancement of long-distance microwave wireless power transfer (WPT) performance by utilizing naturally formed evaporation ducts near the sea surface.
Jinyi Hui, Hongguang Wang, Chunliang Liu, Wen Ding   +3 more
doaj   +1 more source

Technicl analysis of a combined juice concentration process involving osmotic evaporation, membrane distillation and direct contact evaporation [PDF]

, 2013
CO2 and water fluxes were measured in membrane distillation and membrane distillation combined with osmotic evaporation. Direct contact evaporation was carried out using water and NaCl solution with the aim of comparing the efficiency of heat exchange ...
Favaro, Enrico
core  

Observations of anomalous over the horizon microwave radio propagation inside the tropical maritime evaporation duct in North Queensland, Australia. Part Two: some anomalous and as yet unexplained events

, 2004
In part one of this paper we presented a series of results that agreed extremely well with current thinking on propagation within the evaporation duct and duct formation.
Kerans, Andrew, Woods, G.S., Woods, Graham, Kerans, A.J.   +3 more
core   +1 more source

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

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   +1 more source