Scattering of waves within a nonhomogeneous layer above a reflecting surface

1979 ◽  
Vol 22 (6) ◽  
pp. 504-507 ◽  
Author(s):  
I. T. Bubukin
Keyword(s):  
Nonhomogeneous Layer ◽  
Reflecting Surface

DETERMINATION OF THE MINIMAL REFLECTING SURFACE POINTS NUMBER REQUIRED FOR ASSESSMENT OF LARGE-SIZE TRAN SFORMABLE ANTENNA PATTERN DEVIATION

2018 ◽  
Vol 19 (1) ◽  
pp. 66-75
Author(s):  
G.I. Kalabegashvili ◽  
◽  
E.V. Bikeev ◽  
M.G. Mathylenko ◽  
◽  
...  
Keyword(s):  
Antenna Pattern ◽  
Large Size ◽  
Pattern Deviation ◽  
Reflecting Surface

Active control of the scattered radiation with a reflecting surface

2019 ◽  
Vol 67 (3) ◽  
pp. 190-196
Author(s):  
Ning Han
Keyword(s):  
Control System ◽  
Active Control ◽  
Scattered Radiation ◽  
Sound Pressure ◽  
Sound Field ◽  
Control Area ◽  
Mirror Image ◽  
Three Dimension ◽  
Control Effect ◽  
Reflecting Surface

Based on a prediction method of the scattered sound pressure, an active control system was proposed in previous work for the three-dimension scattered radiation, where all the relevant simulations and experiments were implemented in three-dimensional free sound field. However, for practical applications, such as the anti-eavesdropping system or the stealth system for submarines, the sound field conditions are usually complex, and the most common case is the one with reflecting surface. It is questionable whether the previous control system is still effective in non-free sound field, or what improvements should be operated to ensure the control effect. In this article, based on the mirror image principle, two methods of calculating the control source strengths are proposed for the scattered radiation control, and numerical simulations with one-channel and multi-channel system are implemented to detect the corresponding control effect. It is seen that the local active control for the scattered radiation is still effective, and the reduction of the sound pressure level as well as the control area is extended with the increasement of the error sensors and control sources.

Soil and ecological division into districts of the Baikal region

2018 ◽  
Vol 940 (10) ◽  
pp. 54-64 ◽  
Author(s):  
I.A. Belozertseva ◽  
A.A. Sorokovoj
Keyword(s):  
Baikal Region ◽  
Soil Cover ◽  
Soil Formation ◽  
Forest Steppe ◽  
Leading Role ◽  
Soil Cover Structure ◽  
Reflecting Surface ◽  
Heat And Moisture ◽  
Made In

On the basis of long-term researches of soils in the territory of Russia and Mongolia soil and ecological division into districts of the Baikal region is carried out. At division into districts the whole set of an environment of soil formation was considered. On the map of soil and ecological division into districts 13 mountain, mid-mountain, low-mountain taiga, foothill, hollow-valley, forest-steppe and steppe provinces reflecting surface device originality as the ratio of balance of heat and moisture forming a basis to zoning is shown against the background of difficult orography are allocated. In total 42 districts on lithologic-geomorphological features are allocated. In formation of distinctions of a soil cover of these provinces the leading role is played by bioclimatic factors and inside them the lithologic-geomorphological ones. In the view of structural approach of the district they are considered as territories with a certain natural change of several types of the soil cover structure caused by features of a relief and the parent rock. The map is made in the MapInfo program. It is revealed that on ill-defined width zoning of soils the vertical one which has a greater influence on soils of this region is imposed. Soils of the Baikal region are not similar to the soils located at the same latitude of the flat European territory of Russia. Zone soils of this territory are specific and original.

Intelligent reflecting surface enhanced indoor terahertz communication systems

2020 ◽  
Vol 24 ◽  
pp. 100284 ◽  
Author(s):  
Xinying Ma ◽  
Zhi Chen ◽  
Wenjie Chen ◽  
Yaojia Chi ◽  
Zhuoxun Li ◽  
...  
Keyword(s):  
Communication Systems ◽  
Surface Enhanced ◽  
Terahertz Communication ◽  
Reflecting Surface

scholarly journals Weighted Sum Power Maximization for Intelligent Reflecting Surface Aided SWIPT

2020 ◽  
Vol 9 (5) ◽  
pp. 586-590 ◽  
Author(s):  
Qingqing Wu ◽  
Rui Zhang
Keyword(s):  
Weighted Sum ◽  
Power Maximization ◽  
Reflecting Surface

Double Intelligent Reflecting Surface for Secure Transmission with Inter-Surface Signal Reflection

2021 ◽  
pp. 1-1
Author(s):  
Limeng Dong ◽  
Hui-Ming Wang ◽  
Jiale Bai ◽  
Haitao Xiao
Keyword(s):  
Reflecting Surface ◽  
Secure Transmission

scholarly journals Robust Transmission Design for Intelligent Reflecting Surface Aided Secure Communication Systems with Imperfect Cascaded CSI

2020 ◽  
pp. 1-1
Author(s):  
Sheng Hong ◽  
Cunhua Pan ◽  
Hong Ren ◽  
Kezhi Wang ◽  
Kok Keong Chai ◽  
...  
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Transmission Design ◽  
Robust Transmission ◽  
Reflecting Surface

scholarly journals Intelligent Reflecting Surface Aided Vehicular Communications

2020 ◽  
Author(s):  
Dilin Dampahalage ◽  
K. B. Shashika Manosha ◽  
Nandana Rajatheva ◽  
Matti Latva-aho
Keyword(s):  
Vehicular Communications ◽  
Reflecting Surface

scholarly journals Enhancing Secrecy Performance for NOMA Systems with Intelligent Reflecting Surface: Analysis and Optimization

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Van Phu Tuan ◽  
Ic Pyo Hong
Keyword(s):  
Surface Analysis ◽  
Reflecting Surface
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