scholarly journals Methodologies for validating ray-based forward model using finite element method in ultrasonic array data simulation

2018 ◽  
Author(s):  
Jie Zhang ◽  
Andrew Nixon ◽  
Tom Barber ◽  
Nicolas Budyn ◽  
Rhodri Bevan ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Forward Model ◽  
Data Simulation ◽  
Array Data ◽  
Ultrasonic Array ◽  
Element Method

scholarly journals Extended Finite Element Method with Simplified Spherical Harmonics Approximation for the Forward Model of Optical Molecular Imaging

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Wei Li ◽  
Huangjian Yi ◽  
Qitan Zhang ◽  
Duofang Chen ◽  
Jimin Liang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Molecular Imaging ◽  
Spherical Harmonics ◽  
Extended Finite Element Method ◽  
Forward Model ◽  
Internal Boundary ◽  
Extended Finite Element ◽  
Optical Molecular Imaging ◽  
Element Method

An extended finite element method (XFEM) for the forward model of 3D optical molecular imaging is developed with simplified spherical harmonics approximation (SPN). In XFEM scheme ofSPNequations, the signed distance function is employed to accurately represent the internal tissue boundary, and then it is used to construct the enriched basis function of the finite element scheme. Therefore, the finite element calculation can be carried out without the time-consuming internal boundary mesh generation. Moreover, the required overly fine mesh conforming to the complex tissue boundary which leads to excess time cost can be avoided. XFEM conveniences its application to tissues with complex internal structure and improves the computational efficiency. Phantom and digital mouse experiments were carried out to validate the efficiency of the proposed method. Compared with standard finite element method and classical Monte Carlo (MC) method, the validation results show the merits and potential of the XFEM for optical imaging.

Simulation of the ultrasonic array response from real branched cracks using an efficient finite element method

2014 ◽  
Author(s):  
Maria V. Felice ◽  
Alexander Velichko ◽  
Paul D. Wilcox ◽  
Tim J. Barden ◽  
Tony K. Dunhill
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Ultrasonic Array ◽  
Element Method

scholarly journals Forward Model of Electrical Impedance GeoTomography with Point Electrode Model Based on Mixed Finite Element Method: MATLAB Programming Notes

2017 ◽  
Author(s):  
Agah D. Garnadi ◽  
Corinna Bahriawati
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electrical Impedance ◽  
Mixed Finite Element ◽  
Mixed Finite Element Method ◽  
Field Vector ◽  
Forward Model ◽  
Matlab Implementation ◽  
Matlab Programming ◽  
Element Method

We address the need of forward model of electrical impedance geotomography using Mixed Finite Element Method.We use the mixed finite-element method with the standard P1- P0 pair for triangular decompositions for calculating model responses, which makes it possible to compute both the electric potential and the electric field vector economically. For MATLAB implementation, the routine available is easy to modify without hasle.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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