Definition of the Instantaneous Frequency of an Electroencephalogram Using the Hilbert Transform
Issue:
Volume 4, Issue 5, October 2016
Pages:
43-50
Received:
11 July 2016
Accepted:
5 August 2016
Published:
31 August 2016
Abstract: Application of methods of signal processing used in radioengineering for electroencephalograms (EEG) provides to increase the information content of the analysis and medical diagnostic quality. In this paper the method of EEG analysis based on the Hilbert transform are considered. Comparing results analysis with the Fourier transform (FT) and wavelet transform (WT) is carried out. Using the Hilbert transform for calculations, the analysis data on the informative parameters of EEG of healthy persons and those of epileptic patients were obtained. The calculated time dependences of the total phase and instantaneous frequency are presented on the diagrams. It is shown that application of the Hilbert transform provides an evident and simple interpretation of EEG diagnostics results. The phase-frequency method of EEG analysis gives an opportunity to track the dynamics of EEG change, to numerically characterize the duration and variation of the basic physiological rhythms, and, also, to observe the frequency change in time within the limits of each rhythm.
Abstract: Application of methods of signal processing used in radioengineering for electroencephalograms (EEG) provides to increase the information content of the analysis and medical diagnostic quality. In this paper the method of EEG analysis based on the Hilbert transform are considered. Comparing results analysis with the Fourier transform (FT) and wavel...
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Identification of a Novel Coxsackievirus A16 Strain Isolated from the Clinic HFMD Sample in Hubei Province in 2010
Tingting Xu,
Weixia Wang,
Songya Lyu
Issue:
Volume 4, Issue 5, October 2016
Pages:
51-58
Received:
25 August 2016
Accepted:
26 September 2016
Published:
15 October 2016
Abstract: Enterovirus 71 (EV71) and Coxsackievirus A16 (CoxA16) are two major pathogens of Hand, foot and mouth disease (HFMD) that epidemic periodically among children and cause deaths occasionally. There is no effective vaccine or drug for HFMD to date. Here the whole genome of a clinic virus isolate GDV126（China Center for Type Culture Collection, CCTCC）of HFMD was sequenced in Hubei 2010. Phylogenetic analysis demonstrates that the virus belongs to CoxA16. Both phylogenetic and recombination analysis of GDV126 showed that the GDV126 was a recombinant strain of CoxA16. In addition, GDV126 had different cell tropism from EV71. This work demonstrated the genetic variations and evolution of the HFMD pathogens and implicated complication to prevent the disease.
Abstract: Enterovirus 71 (EV71) and Coxsackievirus A16 (CoxA16) are two major pathogens of Hand, foot and mouth disease (HFMD) that epidemic periodically among children and cause deaths occasionally. There is no effective vaccine or drug for HFMD to date. Here the whole genome of a clinic virus isolate GDV126（China Center for Type Culture Collection, CCTCC）o...
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Globally Attractive of a Ratio-Dependent Lotka-Volterra Predator-Prey Model with Feedback Control
Changyou Wang,
Hao Liu,
Shuang Pan,
Xiaolin Su,
Rui Li
Issue:
Volume 4, Issue 5, October 2016
Pages:
59-66
Received:
15 September 2016
Accepted:
27 September 2016
Published:
19 October 2016
Abstract: By constructing suitable Lyapunov function and developing some new analysis techniques, a Lotka-Volterra predator-prey system with ratio-dependent functional responses and feedback controls is studied and a sufficient condition which guarantees the globally attractive of positive solution for the predator-prey model is obtained. Moreover, the numerical simulation to the system is given to illustrate our results.
Abstract: By constructing suitable Lyapunov function and developing some new analysis techniques, a Lotka-Volterra predator-prey system with ratio-dependent functional responses and feedback controls is studied and a sufficient condition which guarantees the globally attractive of positive solution for the predator-prey model is obtained. Moreover, the numer...
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