scholarly journals Fine Three‐Dimensional VHF Lightning Mapping Using Waveform Cross‐Correlation TOA Method

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Bo Liu ◽  
Lihua Shi ◽  
Shi Qiu ◽  
Hengyi Liu ◽  
Wansheng Dong ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Three Dimensional ◽  
Waveform Cross Correlation

Three-Dimensional Microsphere Tracking Using Off-Focus Images Based on Cross-Correlation Matching Algorithm

2015 ◽  
Vol 35 (2) ◽  
pp. 0212002
Author(s):  
谢湘军 Xie Xiangjun ◽  
雷海 Lei Hai ◽  
常新宇 Chang Xinyu ◽  
曾雅楠 Zeng Yanan ◽  
胡晓东 Hu Xiaodong ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Three Dimensional ◽  
Matching Algorithm ◽  
Correlation Matching

Application of cross-correlation algorithm in moving target range-gated three-dimensional laser active imaging

2016 ◽  
Vol 45 (6) ◽  
pp. 0617003
Author(s):  
范有臣 Fan Youchen ◽  
赵洪利 Zhao Hongli ◽  
孙华燕 Sun Huayan ◽  
郭惠超 Guo Huichao ◽  
赵延仲 Zhao Yanzhong
Keyword(s):  
Cross Correlation ◽  
Three Dimensional ◽  
Target Range ◽  
Moving Target ◽  
Correlation Algorithm ◽  
Active Imaging

Use of Waveform Cross Correlation to Reconstruct the Aftershock Sequence of the August 14, 2016, Sakhalin Earthquake

2019 ◽  
Vol 55 (5) ◽  
pp. 544-558
Author(s):  
I. O. Kitov ◽  
S. B. Turuntaev ◽  
A. V. Konovalov ◽  
A. A. Stepnov ◽  
V. V. Pupatenko
Keyword(s):  
Cross Correlation ◽  
Aftershock Sequence ◽  
Waveform Cross Correlation

Measurement of Three Dimensional Position of Particles by Single CCD Image Including Lens Aberration

2003 ◽  
Author(s):  
Hironobu Ueki ◽  
Masahiro Ishida ◽  
Daisaku Sakaguchi ◽  
Manabu Tokumoto
Keyword(s):  
Correlation Coefficient ◽  
Optical System ◽  
Cross Correlation ◽  
Particle Image ◽  
Three Dimensional ◽  
Transformation Function ◽  
Flow Measurements ◽  
Measuring Volume ◽  
Ccd Sensor ◽  
Ccd Image

A new technique using a single CCD image through a lens system with large aberration is proposed in the present study for measurement of the three dimensional position of particles, in which a thick laser light source and a forward-scattering light from particles are processed. This optical system could be very compact and applicable to various flow measurements. The particle image detected by a CCD sensor is distorted in the present system due to lens aberrations. A transformation function of the optical system, which is the relationship between the reference particle with unit luminosity in the measuring volume and the corresponding distorted particle image detected by a CCD sensor through symmetric-convex lenses, is constructed theoretically based on the image formation optics of small particles. In order to obtain a high accuracy in the measurement, it is important to remove the background noise and the light intensity non-uniformity in the measuring volume from the CCD particle image by using a low-pass filtering technique based on the FFT analysis. By calculating the cross-correlation coefficient between the measured particle image and the data base images prepared by the above transformation function, the three dimensional position of the particle is determined as the position at which the largest cross-correlation coefficient is obtained. It is verified experimentally that this compact measuring system is useful for measurement of the three dimensional position of the particle with a good accuracy.

Cross-correlation functions in two-dimensional and three-dimensional colloidal crystals

2001 ◽  
Vol 115 (23) ◽  
pp. 10945-10954 ◽  
Author(s):  
Yuichi N. Ohshima ◽  
Koushi E. Hatakeyam ◽  
Motoi Satake ◽  
Yumi Homma ◽  
Ryosuke Washidzu ◽  
...  
Keyword(s):  
Correlation Functions ◽  
Cross Correlation ◽  
Three Dimensional ◽  
Colloidal Crystals ◽  
Two Dimensional

Comprehensive analysis of the March 7, 2019 Somogyszob, Hungary earthquake cluster

2020 ◽  
Author(s):  
Zoltán Wéber ◽  
Barbara Czecze ◽  
Zoltán Gráczer ◽  
Bálint Süle ◽  
Gyöngyvér Szanyi ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Main Shock ◽  
Moment Tensor ◽  
Thrust Fault ◽  
Comprehensive Analysis ◽  
Waveform Cross Correlation ◽  
Event Location ◽  
Earthquake Cluster ◽  
The Moment ◽  
Fault Mechanism

<div>A magnitude ML 4.0 earthquake struck southwest Hungary on March 7, 2019. The earthquake was reported to be felt in some 53 localities with maximum intensity V on the EMS scale. The earthquake was preceded by four foreshocks and followed by four aftershocks. The hypoDD solutions using differential travel times from waveform cross-correlation show significant improvements in event location. We were able to determine the moment tensor solutions for the main shock and one of the foreshocks and aftershocks, each representing thrust fault mechanism with a horizontal P-axis pointing towards N-NE. The obtained moment magnitudes range from Mw 1.5 to 3.8 with source radii between 100 and 500 m. The stress drop spans from 12 to 19 bars.</div><div> <div> <div> </div> </div> </div>

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