Volume 39 Issue 5
May  2013
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Han Liyan, Cai Mingsheng, Yin Liboet al. Approximation by normal distribution with covering width based EM estimation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(5): 655-659. (in Chinese)
Citation: Han Liyan, Cai Mingsheng, Yin Liboet al. Approximation by normal distribution with covering width based EM estimation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(5): 655-659. (in Chinese)

Approximation by normal distribution with covering width based EM estimation

  • Received Date: 22 Mar 2013
  • Rev Recd Date: 14 May 2013
  • Publish Date: 31 May 2013
  • Based on the comparison and analysis on existingnon-normal distributions, the approximation method by using mixture normal distributions was proposed. For overcoming the order determination difficultyin maximum likelihood estimation based expectation maximization (EM) algorithm, the maximalcovering width principle (MCWP) for order determining was designed. The experiment result supports the feasibility of the method. It shows that the fitting by MCWP has the advantage of the Akaike information criterion. In calculating the covering width, it is necessary to adjust the maximum mean and the minimum mean by the standard deviationbased weights.

     

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