Controlled millimeter-wave experiments and numerical simulations on the enhanced backscattering from one-dimensional very rough surfaces

Radio Science ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 533-548 ◽  
Author(s):  
Phillip Phu ◽  
Akira Ishimaru ◽  
Yasuo Kuga
Keyword(s):  
Numerical Simulations ◽  
Millimeter Wave ◽  
Rough Surfaces ◽  
One Dimensional ◽  
Enhanced Backscattering

scholarly journals Parabolic bursting, spike-adding, dips and slices in a minimal model

2019 ◽  
Vol 14 (4) ◽  
pp. 406
Author(s):  
Mathieu Desroches ◽  
Jean-Pierre Francoise ◽  
Martin Krupa
Keyword(s):  
Qualitative Analysis ◽  
Numerical Simulations ◽  
Phase Portrait ◽  
Minimal Model ◽  
Bifurcation Theory ◽  
Minimal System ◽  
Dimensional System ◽  
Slow Flow ◽  
Van Der Pol ◽  
One Dimensional

A minimal system for parabolic bursting, whose associated slow flow is integrable, is presented and studied both from the viewpoint of bifurcation theory of slow-fast systems, of the qualitative analysis of its phase portrait and of numerical simulations. We focus the analysis on the spike-adding phenomenon. After a reduction to a periodically forced one-dimensional system, we uncover the link with the dips and slices first discussed by J.E. Littlewood in his famous articles on the periodically forced van der Pol system.

Submillimeter And Millimeter Wave ESR Measurements Of The S=1/2 One Dimensional Zigzag Chain MCuP2O7 (M=Sr, Pb)

2006 ◽  
Author(s):  
K. Shiraki ◽  
M. Yoshida ◽  
S. Okubo ◽  
H. Ohta ◽  
M. Sakamoto ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Zigzag Chain ◽  
One Dimensional

Influence of the in-plan distribution of asperities on the normal contact of periodically rough surfaces

2016 ◽  
Vol 230 (9) ◽  
pp. 1382-1391
Author(s):  
K Houanoh ◽  
H-P Yin ◽  
J Cesbron ◽  
Q-C He
Keyword(s):  
Numerical Simulations ◽  
Half Space ◽  
Contact Area ◽  
Rough Surfaces ◽  
Elastic Half Space ◽  
Real Contact Area ◽  
Normal Contact ◽  
Real Contact ◽  
Full Contact ◽  
Rigid Surfaces

The present work aims to analyze the influence of the in-plan distribution of asperities on the contact between periodically rough surfaces. Square pattern and hexagonal pattern rigid surfaces are considered. Their contact with an elastic half-space is analyzed by numerical simulations. Three surfaces are generated with identical asperities periodically distributed in a plan according to different patterns. It follows from numerical results that when the load and the real contact area are small, the asperities act almost independently. However, the interaction between close asperities increases with the load becomes intensified and has a significant effect on the contact area when the situation is close to full contact.

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