Hrem Observations, Peels Analysis and Numerical Simulations of Au/Ni Mbe Multilayers

1993 ◽  
Vol 319 ◽  
Author(s):  
Pascale Bayle ◽  
T. Deutsch ◽  
B. Gilles ◽  
F. LancÇn ◽  
A. Marty ◽  
...  
Keyword(s):  
Image Processing ◽  
Structural Change ◽  
Numerical Simulations ◽  
Structural Evolution ◽  
Hrem Image ◽  
Chemical Profile

AbstractThe structural evolution of Au/Ni multilayers (with an increasing number of Ni monolayers (MLs)) has been investigated by HREM. As soon as the thickness of Ni becomes larger than 5 MLs, a structural change occurs which in fact has been predicted by numerical simulations. The deformation in the multilayer has been characterised by HREM image processing and has been related to the Ni profile. This profile has been compared to the chemical profile obtained by scanning PEELS analysis through the multilayer.

Holographic methods in X-ray crystallography. II. Detailed theory and connection to other methods of crystallography

1993 ◽  
Vol 49 (6) ◽  
pp. 853-866 ◽  
Author(s):  
A. Szöke
Keyword(s):  
Image Processing ◽  
Numerical Simulations ◽  
Reference Beam ◽  
X Ray Diffraction ◽  
Phase Information ◽  
Acta Cryst ◽  
X Ray ◽  
X Ray Crystallography ◽  
Mathematical Properties ◽  
The Waves

Equations are derived for finding an unknown part of the electron density in the unit cell of a crystal when part of the structure of its contents is already known. These equations are based on the similarity of the X-ray diffraction pattern to a hologram. The X-ray field scattered by the known part of the structure is identified as the holographic reference beam. It interferes with the waves scattered from the unknown part of the structure. The interference pattern contains phase information that can be exploited to recover fully the unknown part of the structure. This paper discusses mathematical properties of the resulting equations and some methods for their solution. A strong similarity to inverse problems of image processing is pointed out and connections to other known methods of X-ray crystallography are established. In paper III [Maalouf, Hoch, Stem, Szöke & Szöke (1993). Acta Cryst. A49, 866–871], some modest numerical simulations are presented.

scholarly journals Dual-Mode Memristor Synaptic Circuit Design and Application in Image Processing

2021 ◽  
Vol 9 ◽  
Author(s):  
Rui Wang ◽  
Zhicheng Mu ◽  
Hui Sun ◽  
Yuyue Wang
Keyword(s):  
Neural Network ◽  
Image Processing ◽  
Numerical Simulations ◽  
Circuit Design ◽  
Simple Structure ◽  
Edge Extraction ◽  
Dual Mode ◽  
Simulation Experiments ◽  
Precise Control ◽  
Synaptic Circuit

Memristor is a kind of synaptic element with nanometer size and continuously variable memristance. The bridge synaptic circuit constructed by the memristor has a simple structure and precise control. In practice, because of the non-linear characteristics of memristor, it is not easy to control synaptic circuit and errors in weights appear. Therefore, a novel memristor synaptic circuit is proposed in this paper, called the dual-mode memristor bridge synaptic neural network. The proposed method can make the weights more linear by controlling the input voltages and make the outputs more linear by using symmetrical positive and negative pulses. Therefore, the proposed synaptic circuit is easier to be controlled. In this paper, the numerical simulations are conducted and verify the feasibility. Furthermore, the simulation experiments are conducted for edge extraction of grayscale birds’ images in the airport for bird recognition applied for the bird repelling applications.

Measurement of coherency states of metal—ceramic interfaces by HREM image processing

1995 ◽  
Vol 150 (1) ◽  
pp. 77-87 ◽  
Author(s):  
G. Möbus ◽  
E. Schumann ◽  
G. Dehm ◽  
M. Rühle
Keyword(s):  
Image Processing ◽  
Hrem Image ◽  
Metal Ceramic ◽  
Ceramic Interfaces

Analysis of Mismatched Heterointerfaces by Combined HREM Image Processing and Modelling

2003 ◽  
Vol 94 (4) ◽  
pp. 358-367 ◽  
Author(s):  
G. Möbus ◽  
A. Levay ◽  
B. J. Inkson ◽  
M. J. Hÿtch ◽  
A. Trampert ◽  
...  
Keyword(s):  
Image Processing ◽  
Hrem Image
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