Results 11 to 20 of about 900,122 (234)
Investigation of the effects of cloud attenuation on satellite communication systems [PDF]
, 2012 The aim of this project is to investigate the attenuation due to clouds at 20- 50GHz; to develop an accurate long-term prediction model of cloud attenuation applicable to slant-path links and evaluate the impact of cloud attenuation dynamics on the ...
Alawadi, Tareq A.
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Low attenuation microwave waveguides [PDF]
, 1974 PhDAn investigation of the dispersion and attenuation characteristics of cylindrical structures supporting guided electromagnetic waves with low attenuation is described.
Al-Hariri, Ali Mohammed Bakir
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Time-lapse seismic attenuation as a tool for monitoring hydrocarbons and CO2 in geological materials [PDF]
, 2011 Both laboratory experiments and theoretical models have shown seismic attenuation to be sensitive to various petrophysical properties of rock and pore fluids, making attenuation a potentially useful time-lapse attribute to measure and interpret through ...
Blanchard, Thomas David
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The influence law of concrete aggregate particle size on acoustic emission wave attenuation
Scientific Reports, 2021 Elastic waves have different attenuation laws when propagating in various materials, which is one of the important challenges in the application of non-destructive testing methods, such as acoustic emission (AE) technology in geotechnical engineering ...
Xin Wu +3 more
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Energies, 2022 In seismic exploration, obtaining accurate bandwidth of the reflected signal is essential for determining seismic resolution. A portion of the stored energy is attenuated during signal propagation, narrowing the received seismic signal bandwidth ...
Bohan Zhang, Huazhong Wang
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Validation of OSEM algorithm for attenuation correction in cardiac SPECT studies [PDF]
, 2005 Photon attenuation is believed to be one of the major causes of artefacts in cardiac SPECT studies and therefore should be corrected to improve the specificity of cardiac SPECT imaging for the detection of coronary artery disease.
Alenezi, Ahmed M
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Prediction and control of sound propagation in turbofan engine bypass ducts [PDF]
, 2007 This thesis contains original research into the propagation of sound in acoustically lined ductswith flow. The motivation for this work is the requirement to predict the sound attenuation ofacoustic liners in the bypass duct of modern turbofan ...
Brooks, Christopher James
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Gong-kuang zidonghuaThe design, planning, and optimization of mining communication systems, personnel and vehicle positioning, wireless video, and wireless sensing systems such as 5G, 5.5G, WiFi 6, WiFi 7, UWB, and ZigBee require analysis of electromagnetic wave propagation
SUN Jiping, PENG Ming
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INFRASOUND WAVE GENERATED BY THE TUNGUSKA CELESTIAL BODY: AMPLITUDE DEPENDENCE ON DISTANCE
Radio Physics and Radio Astronomy, 2018 Purpose: The study is concerned with the features of variations in the amplitude of infrasound wave propagating through the terrestrial atmosphere at global-scale distances.
L. F. Chernogor, N. B. Shevelev
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Numerical simulation of wave propagation in 2-D fractured media : scattering attenuation at different stages of the growth of a fracture population [PDF]
, 2007 In this paper, we systematically examine the multiple scattering process of seismic waves at consecutive stages of the evolution of 2-D fracture population. Synthetic seismograms are computed using the pseudo-spectral method for elastic wave propagation,
Main, I.G. +7 more
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