Single-shot cross-correlation system for longitudinal imaging in biological tissues

2002 ◽  
Author(s):  
Emmanuel Abraham ◽  
Edouard Bordenave ◽  
Noriaki Tsurumachi ◽  
Gediminas Jonusauskas ◽  
Jean Oberle ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Biological Tissues ◽  
Single Shot ◽  
Correlation System ◽  
Longitudinal Imaging

Single-shot correlation system for longitudinal imaging in biological tissues

2002 ◽  
Vol 208 (4-6) ◽  
pp. 275-283 ◽  
Author(s):  
E. Bordenave ◽  
E. Abraham ◽  
G. Jonusauskas ◽  
J. Oberlé ◽  
C. Rullière
Keyword(s):  
Biological Tissues ◽  
Single Shot ◽  
Correlation System ◽  
Longitudinal Imaging

scholarly journals Longitudinal imaging in biological tissues with a single laser shot correlation system

2002 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
E. Bordenave ◽  
E. Abraham ◽  
G. Jonusauskas ◽  
J. Oberlé ◽  
C. Rullière
Keyword(s):  
Biological Tissues ◽  
Laser Shot ◽  
Single Laser ◽  
Correlation System ◽  
Longitudinal Imaging

scholarly journals LOW-FREQUENCY NOISE MEASUREMENTS OF IR PHOTODETECTORS WITH VOLTAGE CROSS CORRELATION SYSTEM

Measurement ◽  
2021 ◽  
pp. 109867
Author(s):  
Krzysztof ACHTENBERG ◽  
Janusz MIKOŁAJCZYK ◽  
Carmine CIOFI ◽  
Graziella SCANDURRA ◽  
Krystian MICHALCZEWSKI ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Ir Photodetectors ◽  
Noise Measurements ◽  
Correlation System

Diffraction grating single-shot correlation system for measurement of picosecond laser pulses

2010 ◽  
Vol 8 (11) ◽  
pp. 153-156
Author(s):  
张福领 Fuling Zhang ◽  
欧阳小平 Xiaoping Ouyang ◽  
孙美智 Meizhi Sun ◽  
毕群玉 Qunyu Bi ◽  
谢兴龙 Xinglong Xie ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Single Shot ◽  
Picosecond Laser Pulses ◽  
Correlation System

X-ray pulse preserving single-shot optical cross-correlation method for improved experimental temporal resolution

2012 ◽  
Vol 100 (12) ◽  
pp. 121108 ◽  
Author(s):  
M. Beye ◽  
O. Krupin ◽  
G. Hays ◽  
A. H. Reid ◽  
D. Rupp ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
Cross Correlation ◽  
Correlation Method ◽  
Single Shot ◽  
X Ray

Impulse Processing Algorithm for Random Source Signals of Roadheaders That Is Based on Compound Interferometry

2021 ◽  
Vol 26 (1) ◽  
pp. 13-24
Author(s):  
Shenglin Li ◽  
Pingsong Zhang ◽  
Chaoqiang Xi
Keyword(s):  
Time Delay ◽  
Cross Correlation ◽  
Production Equipment ◽  
Random Signal ◽  
Single Shot ◽  
Random Source ◽  
Subsequent Processing ◽  
Reference Trace ◽  
Source Signals ◽  
Delay Information

The boom-type roadheader is the main equipment for realizing the mechanization of coal drifting in coal mines, and it is an indispensable production equipment in major coal-producing countries. Substantial vibrations are generated during the operation of a roadheader; these vibrations carry substantial energy and, thus, can be regarded as a potential source and used for seismic advance detection purposes in mine drifts. Compared with a conventional exploration source, a roadheader source produces a complex continuous random signal. The shape of a seismic wavelet is uncertain and its duration is relatively long; thus, it must be processed into a conventional pulse signal before it can be used for subsequent processing and analysis. Therefore, based on the advantages of seismic interferometry in random signal processing, two seismic interference techniques, namely, deconvolution and cross-correlation, are introduced for constructing a compound interference algorithm. On the basis of a theoretically derived formula, a random signal impulse processing experiment is conducted using field-acquired source signals from a roadheader; this approach resolves the problem that cross-correlation alone cannot yield ideal results. Hence, a feasible algorithm for the impulse processing of a random signal, namely, the compound interference algorithm, is proposed. The algorithm deconvolves each seismic trace to obtain the reference trace and other receiver traces after compressing the wavelet. Then, the reference trace and each receiver trace are cross-correlated, and the wavelet time delay information of each correlated wavelet pulse, namely, the wavelet time delay information of the receiver trace relative to the reference trace, is obtained. Accordingly, the direct wave and reflected waves are recognized. To evaluate the performance of the algorithm, an algorithm application experiment is conducted for another group of random source signals that were collected by a roadheader under different coal drift conditions. Again, the algorithm processing results are consistent with the single-shot record characteristics of an explosive source. Consequently, the proposed algorithm can satisfy the requirements for engineering exploration and analysis. A comprehensive analysis further demonstrates that the compound interference algorithm is both feasible and effective and that the processed seismic signals can be used for subsequent processing and interpretation.

Longitudinal imaging in biological tissues by use of femtosecond optical echography

2003 ◽  
Author(s):  
Emmanuel Abraham ◽  
Edouard Bordenave ◽  
Gedas Jonusauskas ◽  
Jean Oberlé ◽  
Claude Rullière
Keyword(s):  
Biological Tissues ◽  
Longitudinal Imaging
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