Acoustic surveillance based on Higher-order Local Auto-Correlation

2011 ◽  
Author(s):  
Akira Sasou
Keyword(s):  
Higher Order ◽  
Auto Correlation ◽  
Acoustic Surveillance

Hotspot detection using image pattern recognition based on higher-order local auto-correlation

2011 ◽  
Author(s):  
Shimon Maeda ◽  
Tetsuaki Matsunawa ◽  
Ryuji Ogawa ◽  
Hirotaka Ichikawa ◽  
Kazuhiro Takahata ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Higher Order ◽  
Hotspot Detection ◽  
Auto Correlation ◽  
Image Pattern

scholarly journals Applying Non-Steady-State Photo-Emf Technique to Detection of Higher Order Auto Correlation Functions of Ultrashort Optical Pulses

2012 ◽  
Vol 10 (2) ◽  
Author(s):  
P. Moreno Zarate ◽  
Alexandre S. Shcherbakov ◽  
Svetlana Mansurova
Keyword(s):  
Steady State ◽  
Correlation Functions ◽  
Higher Order ◽  
Optical Pulses ◽  
Detection Scheme ◽  
Advantages And Disadvantages ◽  
Ultrashort Optical Pulses ◽  
Auto Correlation ◽  
Emf Technique ◽  
Electro Motive Force

Here we examine a new application of the adaptive detectors based on non-steady-state photo-electro-motive force effect for the detection of higher order  correlation functions, aiming the estimation of the parameters of ultra short optical pulses arranged in high-repetition trains. For this purpose three beam interferometer scheme with two signal beams modulated at different frequencies is proposed. Theoretical analysis of non-steady-state photo-EMF current generated by light distribution formed by superposition of three waves is performed and the possibility to detect simultaneously second and higher order correlation  function is demonstrated.  Potential advantages and disadvantages of such detection scheme for measuring the higher order auto-correlations functions are discussed.

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