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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (8): 1256-1262    DOI: 10.1631/jzus.2007.A1256
Information Science     
Some nonlinear parameters of PP intervals of pulse main peaks
HAN Qing-peng, WANG Ping
School of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China
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Abstract  The PP intervals of pulse main peaks from healthy and unhealthy people (arrhythmia) have different nonlinear characteristics. In this paper, the extraction of PP intervals of pulse main peaks is achieved by picking up P peaks of pulse wave with wavelet transform. Furthermore, several nonlinear parameters (correlative dimensions, maximum Lyapunov exponents, complexity and approximate entropy) of the PP intervals of pulse main peaks extracted from normal and unhealthy pulse signals are calculated, with the results showing that these nonlinear parameters calculated from the main wave interval signals are helpful for analyzing human’s health state and diagnosing heart diseases.

Key words： Crack shell      Super-element      Pressure vessel     
Received: 11 December 2006     
CLC:  TN911.72  
  R318.04  
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HAN Qing-peng
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Cite this article:

HAN Qing-peng, WANG Ping. Some nonlinear parameters of PP intervals of pulse main peaks. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(8): 1256-1262.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A1256     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I8/1256

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