Mutual-correlation function of laser radiation transmitted by a multimode fiber lightguide

1987 ◽  
Vol 47 (3) ◽  
pp. 881-884
Author(s):  
I. S. Volkov ◽  
A. V. Volyar ◽  
L. M. Kuchikyan ◽  
M. E. Kondakov ◽  
V. N. Savchenko
Keyword(s):  
Correlation Function ◽  
Laser Radiation ◽  
Multimode Fiber ◽  
Mutual Correlation ◽  
Mutual Correlation Function ◽  
Fiber Lightguide

scholarly journals Synthesis of Signals with Zero Width of Autocorrelation Function

2018 ◽  
Vol 7 (4.36) ◽  
pp. 37
Author(s):  
A.P. Velichko ◽  
S.F. Mirsaitov ◽  
A.B. Snedkov ◽  
P.O. Shishkov P.O. Shishkov
Keyword(s):  
Correlation Function ◽  
High Resolution ◽  
Autocorrelation Function ◽  
Probe Pulse ◽  
Pulse Propagation ◽  
Chirp Signal ◽  
Mutual Correlation ◽  
Mutual Correlation Function ◽  
Small Width ◽  
Long Duration

This article presents examples of  probing functions construction with a small width of autocorrelation function (a noise-like signal, a chirp signal) of long duration, which allows to obtain a reflectivity profile along a high resolution path. Attention is drawn to the fact that space in the process of probe pulse propagation returns to the receiver in an almost mutual correlation function of reflectivity and probe pulse. This approach opens up new possibilities for filtering signals and recognizing targets with appropriate selection and changing shape of the probe pulse right during measurements.

Implementation of a photonic crystal fiber lightguide and generation of broad-band laser radiation in it

2003 ◽  
Vol 70 (8) ◽  
pp. 612
Author(s):  
K. V. Dukel'skii ◽  
Yu. N. Kondrat'ev ◽  
G. T. Petrovskii ◽  
A. V. Khokhlov ◽  
A. M. Zheltikov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Broad Band ◽  
Crystal Fiber ◽  
Fiber Lightguide

Fiber lightguide catheter for laser radiation

1985 ◽  
Vol 19 (5) ◽  
pp. 159-161
Author(s):  
V. V. Grigor'yants ◽  
V. A. Korolev
Keyword(s):  
Laser Radiation ◽  
Fiber Lightguide

Phase conjugation of XeCl laser radiation in a multimode fiber waveguide

1990 ◽  
Vol 20 (3) ◽  
pp. 276-277 ◽  
Author(s):  
S S Alimpiev ◽  
V S Bukreev ◽  
Sergei K Vartapetov ◽  
I V Veselovskiĭ ◽  
Evgenii M Dianov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Phase Conjugation ◽  
Xecl Laser ◽  
Multimode Fiber ◽  
Fiber Waveguide

A New Automatic Seamless Image Stitching Algorithm Based on the Gray Value of Edges

2014 ◽  
Vol 496-500 ◽  
pp. 2241-2245
Author(s):  
Jian Li Cao ◽  
Li Xu ◽  
Shan Shan Guo ◽  
De Xiang Ding
Keyword(s):  
Computer Vision ◽  
Pattern Recognition ◽  
Computer Simulation ◽  
Correlation Function ◽  
Image Stitching ◽  
Mutual Correlation ◽  
Absolute Value ◽  
Least Absolute Value ◽  
Characteristic Value ◽  
Image Edge

The automatic seamless image stitching technology is a new problem in the field of computer vision and pattern recognition. This paper brings forward a new seamless image stitching algorithm based on the mutual correlation which combines the least absolute value method with the gray value information. The gray characteristic value on the image edge is obtained and the minimum of correlation function is regarded as the matching points to realize image stitching, the effect of which in computer simulation is good.

scholarly journals Results of experimental studies of a tractor equipped with an elastic-damping mechanism when aggregated with a seeder

2021 ◽  
Vol 1 (4) ◽  
pp. 33-44
Author(s):  
S.E. Senkevich ◽  
◽  
Ye.N. Ilchenko ◽  
I.S. Alekseyev ◽  
◽  
...  
Keyword(s):  
Correlation Function ◽  
Spectral Density ◽  
Power Transmission ◽  
Initial Period ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Propagation Time ◽  
Negative Consequences ◽  
Mutual Correlation ◽  
Shaft Line

One of the significant factors influencing the operation of the tractor is the unsteady load that occurs when starting off, during the initial period of acceleration and deceleration. The elastic-damping mechanisms are used to reduce the negative consequences of such loads. Scientists still develop and study their application. In this article, the analysis of the cross correlation function and the analysis of the mutual spectral density of two processes were carried out. The analyzed process-es were the engine crankshaft speed and the drive wheel speed. This analysis shows the change in the speed of the passing load frequencies along the shaft line of the traction class 1.4 wheeled trac-tor power transmission, where an elastic-damping mechanism is installed. The studies were carried out for the operating conditions of a tractor with a seeder. The purpose of the study was to deter-mine the effect of the elastic-damping mechanism installed in the power transmission of a tractor on its operation with a trailed seeder. In the general case, the object of research is the functioning of a tractor of traction class 1.4 process, which is located in a unit with a seeder. Analysis of the mutual correlation function of the two processes showed a change in the speed of the passing load frequen-cies along the shaft line. The ratio of the propagation time of the disturbance signal in the experi-mental tractor in relation to the production version along the shaft line when aggregating the tractor with the seeder decreases by 40.1%. The analysis of the mutual spectral density shows a shift in the frequency of disturbing influences in relation to the serial version and a decrease in their value when the tractor is aggregated with a seeder by 33.3%. The value of the mutual spectral density is lower in the experimental version of the tractor, which may mean that the elastic-damping mechanism, as an element of the power transmission, absorbs part of the load fluctuations and reduces their propagation speed along the shaft line.

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