title: Wavelet approach in noise enhancement of balance control.
abstract: To analyze the dynamic characteristics of the postural sway measurements, the curves of the velocity and acceleration of the postural sway measurements were used.
  
  
  METHODS
  The curves of smoothed velocity and acceleration were got through the filter of Haar wavelet packet decomposing function.
  
  
  RESULTS
  At the increasing of age, the velocity and acceleration of the postural sway measurements are increasing, but they decrease when the noise are introduced.
  
  
  CONCLUSIONS
  For those non-stochastic signals of certain physical explanation, the context method is suitable for analyzing the status of dynamic system.
authors.affiliation: Department of Computer Science, Biomedical Engineering College, Capital University of Medical Sciences, Beijing 100054, China (E-mail address: eduhelp@163.com).
authors.forename: Ping
authors.initials: P
authors.lastname: Zhou