Filters








6,465 Hits in 4.7 sec

Two-phase Flow Visualization Employing Gauss-Newton Method in Microchannel

Yonghong Liu, Mingyan Zu, Xiantao Wang, Je-Eun Choi
2013 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
Electrical resistance tomography (ERT), as an alternative technique to visualize multi-phase flows, has high temporal resolution for monitoring fast transient processes.  ...  Gauss-Newton method with adaptive threshold (GNAT) technique was presented to improve the spatial resolution of ERT images.  ...  There exist several categories of reconstruction algorithms for ERT, typically including non-iterative methods such as back projection method [10] , and iterative method (indirect method) with Jacobian  ... 
doi:10.12928/telkomnika.v11i4.1185 fatcat:trv3hfizo5gjfp644omdti6whe

Page 146 of Journal of Engineering Mathematics Vol. 51, Issue 2 [page]

2005 Journal of Engineering Mathematics  
Rubinacci, A new non-iterative inversion method for electrical resistance tomography. Inverse Problems 18 (2002) 1809-1829. G. Alessandrini, E. Rosset and J. K.  ...  Peng, Image reconstruction algorithms for electrical capacitance tomography. Meas. Sci. Technol. 14 (2003) R1-R13. D. Isaacson and M.  ... 

Application and processing of geophysical images for mapping faults

Donat Demanet, Eric Pirard, François Renardy, Denis Jongmans
2001 Computers & Geosciences  
In this paper, we applied two imaging methods (electrical and seismic refraction tomography) to this aim.  ...  Image analysis techniques (watershed divide line on gradient images) are applied to the tomography results to add objectivity to the interpretation.  ...  We also wish to thank the Royal Observatory of Belgium for its contribution.  ... 
doi:10.1016/s0098-3004(00)00156-4 fatcat:glp3h7esqnb7vmigx6qzyy622y

Resolution enhancement of electrical resistance tomography by iterative back projection method

Noriaki Ichijo, Shinsuke Matsuno, Taiji Sakai, Yoshikatsu Tochigi, Meguru Kaminoyama, Kazuhiko Nishi, Ryuta Misumi, So Nishiyama
2015 Journal of Visualization  
An iterative back projection method (i-BP) has been developed to improve the resolution of reconstructed images produced by electrical resistance tomography (ERT).  ...  This solution is based on an iterative calculation of the electrical fields and it is possible to reconstruct clearer images than those reconstructed by the conventional back projection method without  ...  For the iterative algorithm, an electrical calculation is implemented for the resistance field that was estimated by the back projection method.  ... 
doi:10.1007/s12650-015-0308-8 pmid:27110211 pmcid:PMC4830860 fatcat:2tffgzbu7beprp4fdu3hhfcbvy

An Influence of the Noise on the Imaging Algorithm in the Electrical Impedance Tomography

Hui Zhang, Li Wang, Yongjun Zhou, Peijie Zhang, Jixia Wu, Ying Li
2013 Open Journal of Biophysics  
Electrical impedance tomography (EIT) reconstructs the internal impedance distribution of the body from electrical measurements on body surface.  ...  The numerical results show that the MPSO-MNR algorithm can reconstruct the resistivity distribution within the certain iterations.  ...  Introduction Electrical impedance tomography (EIT) is a non-invasive imaging technique, which aims to reconstruct images of internal electrical property (conductivity, permittivity and permeability in  ... 
doi:10.4236/ojbiphy.2013.34027 fatcat:2wnjg2kptffnleu22utjmsyjjm

IMPEDANCE IMAGE RECONSTRUCTION WITH ARTIFICIAL NEURAL NETWORK IN ELECTRICAL IMPEDANCE TOMOGRAPHY

Beyhan Kilic
2019 European Journal of Technic  
The classic iterative image reconstruction algorithms have reconstruction errors. Accordingly, Electrical impedance tomography images suffer low accuracy.  ...  Electrical impedance tomography views the electrical properties of the objects by injecting current with surface electrodes and measuring voltages.  ...  Therefore an Iterative solution is inevitable. The most common non-linear method is Newton-Raphson.  ... 
doi:10.36222/ejt.650616 fatcat:m2ey2imbcbgnzakm2nfpczljwq

Electrical Tomography: a review of Configurations and Applications to Particulate Processes

Maria G. Rasteiro, Rui C. C. Silva, Fernando A. P. Garcia, Pedro M. Faia
2011 Kona : Powder and Particle  
Finally, the future challenges for electrical tomography will be addressed.  ...  Several non-invasive techniques of flow characterisation can be found in the literature, however, electrical tomography offers a vast field of possibilities due to its low cost, portability and, above  ...  Acknowledgments The authors are grateful for the financial support of FCT (Fundação para a Ciência e Tecnologia) to their project, contract PTDC/EQU-EQU/66670/2006.  ... 
doi:10.14356/kona.2011010 fatcat:j3fkuchzuvgfhicq7tdh67xryi

Numerical Simulation Study on the Detection of Weak Structural Plane of Rock Slope by Using 3D Electrical Resistivity Tomography

Xin Zhang
2016 Engineering  
Based on 3D electrical resistivity tomography, a model of rock slope with weak structure plane is established, and the characteristics of three-dimensional resistivity imaging of weak structure plane under  ...  The results show that the weak structural plane has a better reflection in 3D electrical resistivity tomography; the distribution of weak structural plane of 3D resistivity imaging can be roughly determined  ...  development of three-dimensional electrical resistivity tomography.  ... 
doi:10.4236/eng.2016.87041 fatcat:2ese34m3mfgndnvqwgpjkjkrzi

Review on Electrical Impedance Tomography: Artificial Intelligence Methods and its Applications

Talha Ali Khan, Sai Ho Ling
2019 Algorithms  
Electrical impedance tomography (EIT) has been a hot topic among researchers for the last 30 years. It is a new imaging method and has evolved over the last few decades.  ...  EIT contains no identified threats and as compared to magnetic resonance imaging (MRI) and computed tomography (CT) scans (imaging techniques), it is cheaper in cost as well.  ...  Lee et al. [19] PSO PSO is combined with the Gauss-Newton method to visualize the two-phase flow for the electrical resistance tomography.  ... 
doi:10.3390/a12050088 fatcat:xfx2axmz3jhqnbbtxrdvfeyb54

Static imaging of the electrical impedance tomography on cylinder physical phantom

Ruigang Liu, Feng Fu, Fusheng You, Xuetao Shi, Xiuzhen Dong, Feng Liu, Dong-Hoon Lee, Ricardo Lagoa, Sandeep Kumar
2015 Bio-medical materials and engineering  
Static imaging of the electrical impedance tomography can obtain the absolute electrical conductivity distribution at one section of the subject.  ...  A group of static images of conductivity distribution in the cylinder phantom are reconstructed by the modified Newton-Raphson algorithm with two kinds of regularization methods.  ...  . / Static imaging of the electrical impedance tomography on cylinder physical phantom R. Liu et al. / Static imaging of the electrical impedance tomography on cylinder physical phantom  ... 
doi:10.3233/bme-151436 pmid:26405899 fatcat:nhb62lgxzrhabmjnzzewphuau4

Investigation of the direct and indirect conductivity distribution image reconstruction algorithms in electrical tomography

Mykhaylo Dorozhovets, Anton Prygrodsky
2011 Proceedings of the 6th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems  
In this paper the two indirect conductivity distribution reconstruction algorithms in electrical tomography are presented.  ...  The first algorithm based on the previous resistivity reconstruction and the second one based on the usage of the inverse measured voltages.  ...  Usually the inverse problem (image reconstruction of a conductivity space distribution) of electrical tomography is strongly non-linear, so iteration reconstruction algorithms are used to solve it.  ... 
doi:10.1109/idaacs.2011.6072796 dblp:conf/idaacs/DorozhovetsP11 fatcat:ensuzqd7zbgztdvdittgryy4wq

Electronic hardware design of a low cost tactile sensor device for physical human-robot interactions

Ganna Pugach, Viacheslav Khomenko, Artem Melnyk, Alexandre Pitti, Patrick Henaff, Philippe Gaussier
2013 2013 IEEE XXXIII International Scientific Conference Electronics and Nanotechnology (ELNANO)  
Abstract-This paper proposes a low-cost system, based on the method of Electrical Impedance Tomography (EIT), for data acquisition from soft conductive fabric, for the purposes of designing of robots artificial  ...  A simple multiplexer/ demultiplexer circuit is used for retrieving the resistance field from the pair-wised electrodes which inject the electrical current and the electrodes which measure the output voltage  ...  The most popular method for image reconstruction is the Newton's iterative method [30] . B.  ... 
doi:10.1109/elnano.2013.6552033 fatcat:636rpuykljf4ldbbfnc5ace75u

Virtual electrical capacitance tomography sensor

Y Li, W Q Yang
2005 Journal of Physics, Conference Series  
Electrical capacitance tomography (ECT) is an effective technique for elucidating the distribution of dielectric materials inside closed pipes or vessels.  ...  This paper describes a virtual electrical capacitance tomography (VECT) system, which can simulate a range of sensor and hardware configurations and material distributions.  ...  Acknowledgement The authors would like to thank Dr Roger Waterfall for his help in preparing the paper.  ... 
doi:10.1088/1742-6596/15/1/031 fatcat:ebnv5euqlnhqjpuxusfs562zji

Electrical resistivity tomography (ERT) data for clay mineral mapping

Rungroj Arjwech, Pakawat Sriwangpon, Kittipong Somchat, Potpreecha Pondthai, Mark Everett
2020 Data in Brief  
Images for the resistivity survey are presented as 2D cross section of resistivity profile.  ...  The data were collected using the IRIS Syscal Pro Plus multi-electrode imaging system with internal switchbox and an array of 48 steel electrodes.  ...  Images for the resistivity survey are presented as cross section of resistivity profile.  ... 
doi:10.1016/j.dib.2020.105494 pmid:32322627 pmcid:PMC7163305 fatcat:46zbalmhvndytmjjrbllscgayq

Image Reconstruction for Solid Profile Measurement in ERT using Non-invasive Approach

Yasmin Abdul Wahab, Ruzairi Abdul Rahim, Mohd Hafiz Fazalul Rahiman, Leow Pei Ling, Suzanna Ridzuan Aw, Muhammad Jayasuman Pusppanathan, Mohd Fadzli Abd Shaib, Herlina Abdul Rahim, Elmy Johana Mohamad
2017 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
Image reconstruction software and its image reconstruction algorithm are an important step towards constructing a tomography system.  ...  The simulations and experiments results indicate that the sensitivity distribution of non-invasive ERT system can be applied in getting a tomogram of the medium of interest.  ...  Very special thanks go to Universiti Teknologi Malaysia, PROTOM research group for their generous support and cooperation, and UTM grant (M53) for funding this project.  ... 
doi:10.12928/telkomnika.v15i4.7234 fatcat:fcbwezrsqzfvphyqi5u3zhwf2m
« Previous Showing results 1 — 15 out of 6,465 results