Theoretical and Experimental Study of the Backscattering Cross Section of an Infinite Ribbon

1960 ◽  
Vol 31 (12) ◽  
pp. 2261-2266 ◽  
Author(s):  
Michael S. Macrakis
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Backscattering Cross Section

Backscattering Analysis of Cylinder Shaped Scatterer in Vegetation Medium: Comparison Between Theories

2020 ◽  
Vol 2 (1) ◽  
pp. 15-18
Author(s):  
Syabeela Syahali ◽  
Ewe Hong Tat ◽  
Gobi Vetharatnam ◽  
Li-Jun Jiang ◽  
Hamsalekha A Kumaresan
Keyword(s):  
Numerical Solution ◽  
Cross Section ◽  
Traditional Method ◽  
Microwave Remote Sensing ◽  
Solution Model ◽  
Complex Nature ◽  
Good Match ◽  
Equivalent Source ◽  
Backscattering Cross Section ◽  
Method Model

This paper analyses the backscattering cross section of a cylinder both using traditional method model and a new numerical solution model, namely Relaxed Hierarchical Equivalent Source Algorithm (RHESA). The purpose of this study is to investigate the prospect of incorporating numerical solution model into volume scattering calculation, to be applied into microwave remote sensing in vegetation area. Results show a good match, suggesting that RHESA may be suitable to be used to model the more complex nature of vegetation medium.

Experimental study of breaking wave loads on elevated pile cap with rectangular cross-section

2021 ◽  
Vol 227 ◽  
pp. 108878
Author(s):  
Jie Hong ◽  
Kai Wei ◽  
Zhonghui Shen ◽  
Bo Xu ◽  
Shunquan Qin
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Breaking Wave ◽  
Wave Loads ◽  
Pile Cap

Kelvin and V-like Ship Wakes Affected by Surfactants

2001 ◽  
Vol 45 (02) ◽  
pp. 150-163
Author(s):  
Gregory Zilman ◽  
Touvia Miloh
Keyword(s):  
Cross Section ◽  
Single Layer ◽  
Ship Wake ◽  
Backscattering Cross Section ◽  
Alternative Approach ◽  
Ship Wakes ◽  
Half Angle ◽  
Radar Backscattering ◽  
The Green Function ◽  
Theoretical Results

Synthetic aperture radar (SAR) ship wake images in light wind and calm sea conditions frequently appear in the form of a bright V with a half-angle of 2 to 3 deg. Sophisticated and conflicting explanations of this phenomenon, based on the Bragg scattering mechanism, have been proposed. There is a belief that the narrow V-wake is not a part of the Kelvin wake. An alternative approach, which is not generally accepted, suggests that short divergent Kelvin waves may contribute to the V-wake imaging although these waves are mixed with unsteady surface waves generated by the ship-induced turbulence. Ship-generated divergent waves contaminated by surfactants and their radar backscattering cross section are studied. The hull of the ship is represented by a single layer of hydrodynamic singularities. The Green function of a point source moving below a free surface covered by surfactants is derived. A closed-form asymptotic solution for the far ship wave wake is obtained. It is used to calculate analytically the corresponding radar backscattering cross section. The radiative, viscous, and surfactant-induced decay of the V-wake brightness along the V-arms is discussed. The theoretical results are compared against available experimental data.

scholarly journals EXPERIMENTAL STUDY ON RC BEAM SPECIMENS WITH CFRP ROD/MESH EMBEDDED AND INCREASING THICKNESS OF THE CROSS SECTION

2020 ◽  
Vol 73 (1) ◽  
pp. 348-354
Author(s):  
Shohei UEMURA ◽  
Kiyoshi MURAKAMI ◽  
Ayumi SATOH ◽  
Seiichiro YAMAUCHI
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Rc Beam ◽  
The Cross

scholarly journals Формирование и деформация капель жидкости в микроканалах

2020 ◽  
Vol 46 (15) ◽  
pp. 18
Author(s):  
Ф.В. Роньшин ◽  
Ю.А. Дементьев ◽  
Е.А. Чиннов
Keyword(s):  
Experimental Study ◽  
Flow Regime ◽  
Cross Section ◽  
Weber Number ◽  
Rectangular Cross Section ◽  
Critical Value ◽  
Drop Formation ◽  
Liquid Bridges ◽  
Liquid Moving ◽  
Side Walls

An experimental study of drop formation in narrow horizontal microchannels with rectangular cross section and a height from 50 to 150 micrometers was performed. It is shown that in these channels there is a new flow regime when drops moving along the microchannel, which are vertical liquid bridges. Three mechanisms of the formation of such drops are distinguished: the formation directly near the liquid nozzle, the separation of droplets from the liquid moving along the side walls of the channel, and due to the destruction of strongly deformed drops and horizontal liquid bridges. It was found that the deformation of drops increases with an increase in the Weber number. It is shown that when the first critical value of the Weber number is reached, the drops begin to deform, and when the second Weber number is reached, they break.

Experimental Study of Emission Cross Section Spectra and Microchip Laser Spectra of Nd∶GdVO4 and Nd∶YVO4 Crystals

2017 ◽  
Vol 44 (11) ◽  
pp. 1101004 ◽  
Author(s):  
蔡美伶 Cai Meiling ◽  
胡 淼 Hu Miao ◽  
戴 荣 Dai Rong ◽  
陈 松 Chen Song ◽  
李齐良 Li Qiliang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Emission Cross Section ◽  
Microchip Laser

Experimental study of the energy dependence of the total cross section for the 6He + natSi and 9Li + natSi reactions

2017 ◽  
Vol 48 (6) ◽  
pp. 922-926 ◽  
Author(s):  
Yu. G. Sobolev ◽  
Yu. E. Penionzhkevich ◽  
D. Aznabaev ◽  
E. V. Zemlyanaya ◽  
M. P. Ivanov ◽  
...  
Keyword(s):  
Experimental Study ◽  
Total Cross Section ◽  
Energy Dependence ◽  
Cross Section
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