scholarly journals General parity-odd CMB bispectrum estimation

2014 ◽  
Vol 2014 (05) ◽  
pp. 008-008 ◽  
Author(s):  
Maresuke Shiraishi ◽  
Michele Liguori ◽  
James R. Fergusson
Keyword(s):  
Bispectrum Estimation

Performance of a parallel bispectrum estimation code

1991 ◽  
Author(s):  
Edward A. Carmona ◽  
Charles L. Matson
Keyword(s):  
Bispectrum Estimation

Application of Algorithm of Hidden Markov Model and High-Order Spectrum in Fault Diagnosis of Power Electronic Circuit

2012 ◽  
Vol 468-471 ◽  
pp. 488-491 ◽  
Author(s):  
Ren Wu Yan ◽  
Li Zhou ◽  
Zhan Ying Zhong
Keyword(s):  
Fault Diagnosis ◽  
Markov Model ◽  
Hidden Markov Model ◽  
Hidden Markov ◽  
Arma Model ◽  
High Order ◽  
Power Electronic ◽  
Electric Locomotive ◽  
Order Spectrum ◽  
Bispectrum Estimation

This paper presents a method of applying the discrete hidden markov model and high-order spectrum to fault diagnosis of power electronic circuit.With bispectrum analysis, an ARMA model parametric bispectrum estimation is presented for Fault feature extraction firstly,and then fault modes were trained and recognized by Discrete Hidden Markov Model. Finally, electric locomotive main converter of SS8 type is used as an example to illustrate the new approach of fault diagnosis. The experimental results show that the proposed method has a high correct rate.The correct rate of the proposed method is 100%in the case of no noise or 5% noise whicn is 16.11% and 23.79% higher respectively than that of DHMM and BP neural network methods. So the method has practical value.

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