Statistics
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001acasn..42..375d&link_type=abstract
Acta Astronomica Sinica, vol.42, no.4, p. 375-381
Statistics
1
Statistics, Fuzzy Comprehensive Evaluation, Classification Of Cmes, Statistics, Fuzzy Comprehensive Evaluation, Classification Of Cmes
Scientific paper
It is widely accepted that the properties of Coronal Mass Ejections (CMEs) depend strongly on their structure. So in the study of solar-terrestrial events, it is very important to classify different morphological CMEs according to intensity. The method of fuzzy comprehensive evaluation, can be applied to the quantitative research of the intensity classification of CMEs. In the application of this method, it is usually required that some factors, CMEs' speed, span, mass and kinetic energy, which were obtained in previous statistic, be selected to form the set of factors. According to the set of factors, membership functions are determined. By data reduction, three CME intensity categories such as strong, middle and weak are obtained. The relative intensity of different morphological CMEs can be also obtained according to the value of membership. The analysis of results shows that the method of fuzzy comprehensive evaluation is better than the method of traditional statistics.
Dai Yafei
Tang Y.-H.
Zong Wei-Guo
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