Approximate evaluation of the wave propagation parameters of MF TL communication systems for mine tunnels using image theory

2014 ◽  
Vol 28 (4) ◽  
pp. 515-530 ◽  
Author(s):  
J.A. Brandão Faria
Keyword(s):  
Wave Propagation ◽  
Communication Systems ◽  
Image Theory ◽  
Approximate Evaluation ◽  
Propagation Parameters ◽  
Mine Tunnels

Electromagnetic wave propagation and inequalities for moments of chord lengths

2004 ◽  
Vol 36 (04) ◽  
pp. 987-995 ◽  
Author(s):  
Jan Hansen ◽  
Matthias Reitzner
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Wireless Communication ◽  
Uniform Distribution ◽  
Surface Area ◽  
Convex Domain ◽  
Communication Systems ◽  
Electromagnetic Wave Propagation ◽  
Wireless Communication Systems ◽  
Received Power

In a convex domain K in ℝ d , a transmitter and a receiver are placed at random according to the uniform distribution. The statistics of the power received by the receiver is an important quantity for the design of wireless communication systems. Bounds for the moments of the received power are given, which depend only on the volume and the surface area of the convex domain.

Calculation of wave propagation parameters in generalized media

2012 ◽  
Vol 54 (12) ◽  
pp. 2731-2736 ◽  
Author(s):  
Fernando Obelleiro ◽  
José M. Taboada ◽  
Marta G. Araújo
Keyword(s):  
Wave Propagation ◽  
Propagation Parameters

Impact of Rough Wall Surface on Electromagnetic Wave Propagation Characteristics in Mine Tunnels

2011 ◽  
Vol 301-303 ◽  
pp. 1417-1421
Author(s):  
Shan Hua Yao ◽  
Xian Liang Wu
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Coal Mine ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Rough Wall ◽  
Wall Surface ◽  
Propagation Characteristics ◽  
Waves Propagation ◽  
Mine Tunnels

In this paper ,the mine tunnels is regard as wave-guide which contains kinds of un-beneficial medium, we have study the formulas of electromagnetic waves propagation attenuation and roughness attenuation, the relations between propagation attenuation and roughness and frequency were simulated. The results show that the influence of propagation attenuation in lower frequency is more obvious, and roughness attenuation is increased rapidly as roughness of coal mine tunnels increasing. But tilted attenuation is stronger than roughness attenuation as propagation frequency increasing.

Reference Base to Ensure Uniformity in Measurements of Ultrasound Wave Propagation Parameters in Solids in Far Eastern Branch VNIIFTRI

NDT World ◽  
2017 ◽  
pp. 26-29
Author(s):  
Базылев ◽  
Petr Bazylev ◽  
Крумгольц ◽  
Igor Krumgolc ◽  
Луговой ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Ultrasound Wave ◽  
Reference Base ◽  
Propagation Parameters ◽  
Far Eastern

Effect of surface roughness on wave propagation parameters

Géotechnique ◽  
1998 ◽  
Vol 48 (1) ◽  
pp. 129-136 ◽  
Author(s):  
C. Santamarina ◽  
G. Cascante
Keyword(s):  
Surface Roughness ◽  
Wave Propagation ◽  
Propagation Parameters ◽  
Effect Of Surface
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