Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cha%26a..11..186l&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 11, Issue 3, p. 186-190.
Astronomy and Astrophysics
Astrophysics
Sun, Solar Active Regions And Flares, Fuzzy Set Analysis
Scientific paper
We selected 400 sample solar active regions of 1980, each containing the following data: sunspot type, total spot area, magnetic field type, maximum field intensity, peculiar structures, radio flux at 3 cm, and radio flux ratio between 3 cm and 10 cm. These quantities define a generalized vector for each sample point. We applied a fuzzy set analysis, which resulted in 14 types of active regions.
On the basis of fuzzy classification, we make a fuzzy prediction (whether there will be a flare of Class 1 or over on the day following each of the 12 mid-month days of 1981). The result proved to be encouraging.
Li Wangrong
Liu Xu-Zhao
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