Notice of Retraction: The Research and Application of a Novel Time Domain Hybrid Method for EMI Analysis of Lumped Circuits in a Shielded Device

2016 ◽  
Vol 58 (4) ◽  
pp. 964-970 ◽  
Author(s):  
Zhihong Ye ◽  
Cheng Liao ◽  
Xiangzheng Xiong ◽  
Min Zhang
Keyword(s):  
Hybrid Method ◽  
Time Domain ◽  
Lumped Circuits

Optimized Mooring Line Simulation Using a Hybrid Method Time Domain Scheme

2014 ◽  
Author(s):  
Niels Hørbye Christiansen ◽  
Per Erlend Torbergsen Voie ◽  
Jan Høgsberg ◽  
Nils Sødahl
Keyword(s):  
Hybrid Method ◽  
Time Domain ◽  
Computation Time ◽  
Mooring Line ◽  
Mooring Lines ◽  
Fem Model ◽  
Input Variables ◽  
The Time Domain ◽  
The Cost ◽  
Short Time

Dynamic analyses of slender marine structures are computationally expensive. Recently it has been shown how a hybrid method which combines FEM models and artificial neural networks (ANN) can be used to reduce the computation time spend on the time domain simulations associated with fatigue analysis of mooring lines by two orders of magnitude. The present study shows how an ANN trained to perform nonlinear dynamic response simulation can be optimized using a method known as optimal brain damage (OBD) and thereby be used to rank the importance of all analysis input. Both the training and the optimization of the ANN are based on one short time domain simulation sequence generated by a FEM model of the structure. This means that it is possible to evaluate the importance of input parameters based on this single simulation only. The method is tested on a numerical model of mooring lines on a floating off-shore installation. It is shown that it is possible to estimate the cost of ignoring one or more input variables in an analysis.

A time-domain hybrid method combining the finite-difference and physical-optics methods

1999 ◽  
Vol 21 (2) ◽  
pp. 82-88 ◽  
Author(s):  
F. Le Bolzer ◽  
R. Gillard ◽  
J. Citerne ◽  
V. Fouad Hanna ◽  
M. F. Wong
Keyword(s):  
Finite Difference ◽  
Hybrid Method ◽  
Time Domain ◽  
Physical Optics
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