Numerical determination of diffraction, slope-, and multiple-diffraction coefficients of impedance wedges by the method of parabolic equation: Space waves

1995 ◽  
Vol 43 (12) ◽  
pp. 1429-1435 ◽  
Author(s):  
Ning Yan Zhu ◽  
F.M. Landstorfer
Keyword(s):  
Parabolic Equation ◽  
Numerical Determination ◽  
Multiple Diffraction ◽  
Diffraction Coefficients

Symmetry breaking in convergent-beam diffraction

1989 ◽  
Vol 47 ◽  
pp. 480-481
Author(s):  
D.J. Eaglesham
Keyword(s):  
Symmetry Breaking ◽  
Point Group ◽  
X Ray Diffraction ◽  
Multiple Diffraction ◽  
Space Groups ◽  
Atomic Displacements ◽  
Small Probe ◽  
Phase Sensitive ◽  
Convergent Beam

Convergent Beam Electron Diffraction is now almost routinely used in the determination of the point- and space-groups of crystalline samples. In addition to its small-probe capability, CBED is also postulated to be more sensitive than X-ray diffraction in determining crystal symmetries. Multiple diffraction is phase-sensitive, so that the distinction between centro- and non-centro-symmetric space groups should be trivial in CBED: in addition, the stronger scattering of electrons may give a general increase in sensitivity to small atomic displacements. However, the sensitivity of CBED symmetry to the crystal point group has rarely been quantified, and CBED is also subject to symmetry-breaking due to local strains and inhomogeneities. The purpose of this paper is to classify the various types of symmetry-breaking, present calculations of the sensitivity, and illustrate symmetry-breaking by surface strains.CBED symmetry determinations usually proceed by determining the diffraction group along various zone axes, and hence finding the point group. The diffraction group can be found using either the intensity distribution in the discs

Experimental and Numerical Determination of Micropropulsion Device Efficiencies at Low Reynolds Numbers

2004 ◽  
Author(s):  
Andrew D. Ketsdever ◽  
Michael T. Clabough ◽  
Sergey F. Gimelshein ◽  
Alina Alexeenko
Keyword(s):  
Reynolds Numbers ◽  
Numerical Determination ◽  
Low Reynolds Numbers ◽  
Low Reynolds

scholarly journals Experimental and numerical determination of the optimum configuration of a parabolic wave extinction system for flumes

2021 ◽  
Vol 238 ◽  
pp. 109748
Author(s):  
U. Izquierdo ◽  
L. Galera-Calero ◽  
I. Albaina ◽  
A. Vázquez ◽  
G.A. Esteban ◽  
...  
Keyword(s):  
Numerical Determination ◽  
Optimum Configuration

On the determination of the right-hand side in a parabolic equation

2012 ◽  
Vol 62 (11) ◽  
pp. 1672-1683 ◽  
Author(s):  
A. Ashyralyev ◽  
A.S. Erdogan ◽  
O. Demirdag
Keyword(s):  
Parabolic Equation ◽  
Right Hand ◽  
The Right

Experimental and Numerical Determination of Roll Forming Loads

2013 ◽  
Vol 85 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Peter Groche ◽  
Christian Mueller ◽  
Tilman Traub ◽  
Katja Butterweck
Keyword(s):  
Roll Forming ◽  
Numerical Determination
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