نتایج جستجو برای: rain erosion

تعداد نتایج: 47261  

Journal: :Revista Brasileira de Ciências Ambientais 2023

Several devices have been developed to assess soil losses by water erosion. However, they rarely the combined effects of raindrop impact and surface runoff together with vegetation cover on varying slopes. This study aimed design validate an equipment, laboratory scale, evaluate effect erosion undisturbed samples without plant cover, as well kinetic energy simulated rain resultant shear stress ...

Journal: :CoRR 2016
Wenhan Yang Robby T. Tan Jiashi Feng Jiaying Liu Zongming Guo Shuicheng Yan

In this paper, we address a rain removal problem from a single image, even in the presence of heavy rain and rain streak accumulation. Our core ideas lie in the new rain image models and a novel deep learning architecture. We first modify an existing model comprising a rain streak layer and a background layer, by adding a binary map that locates rain streak regions. Second, we create a new mode...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان فارس - دانشکده دندانپزشکی 1381

چکیده ندارد.

Journal: :Journal of offshore mechanics and Arctic engineering 2021

Abstract The presence of rain-induced leading edge erosion wind turbine blades (WTBs) necessitates the development models. One essential parameters for modeling is relative impact velocity between rain droplets and rotating blade. Based on this parameter, damage rate a WTB calculated to estimate expected lifetime. environmental conditions that govern parameter have site-specific variations, thu...

2002

• Background • Acid Rain & Cars • Acid Rain & Forests • Acid Rain & Health • Acid Rain & Water • Acid Rain in Europe • Acid Rain in US • Acid Rain Study The ecological effects of acid rain are most clearly seen in the aquatic, or water, environments, such as streams, lakes, and marshes. Acid rain flows to streams, lakes, and marshes after falling on forests, fields, buildings, and roads. Acid r...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2001
Hongping Liu V. Chandrasekar Eugenio Gorgucci

Detection of rain/no-rain condition on the ground is an important for application of radar rainfall algorithms. A radial basis function (RBF) neural network-based scheme for rain/no-rain determination on the ground using vertical profiles of radar data is described in this paper. Evaluation based on WSR-88D radar over central Florida indicates that rain/no-rain condition can be inferred fairly ...

Journal: :The Annals of occupational hygiene 2008
Taehyeung Kim Dong Ho Lee Kwangseog Ahn Hyunchul Ha Heechang Park Cheng Xu Piao Xiaoyu Li Jeoungyoon Seo

Gravity ventilators rely simply on air buoyancy to extract air and are widely used to exhaust air contaminants and heat from workplaces using minimal energy. They are designed to maximize the exhaust flow rate, but the rain penetration sometimes causes malfunctioning. In this study, the characteristics of rain penetration through a ventilator were examined as a preliminary study to develop a ve...

2010
Zhanqing Li Ruiyue Chen

Though warm rain from low-level liquid clouds contributes significantly to the global precipitation and water cycle, it has been missed or underestimated by satellite remote sensing techniques. IR techniques miss all warm rain because they rely on cloud top temperature. Over land, passive microwave techniques miss all warm rain because they rely on ice scattering at high frequency channel. Over...

2005
Animesh Maitra Kaustav Chakravarty

Measurements of rain attenuation over an earth-space path at Kolkata (22°34' N, 88°29' E), India, have been carried out since June 2004 by receiving a Ku-band signal from the satellite NSS-6 (geostationary at 95 E). The instantaneous attenuations are estimated from the point rain rates measured with an optical raingauge and using the Simple Attenuation Model (SAM). The estimated values closely ...

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