The fuzzy classification of the solar cycle and the prediction for the 22nd solar cycle

Details The fuzzy classification of the solar cycle and the prediction for the 22nd solar cycle The fuzzy classification of the solar cycle and the prediction for the 22nd solar cycle

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985chjss...5..237h&link_type=abstract

Chinese Journal of Space Science, vol. 5, Oct. 1985, p. 237-244. In Chinese, with abstract in English.

Physics

Fuzzy Sets, Prediction Analysis Techniques, Solar Cycles, Classifications, Cluster Analysis

Scientific paper

In this paper, on the basis of fuzzy set theory, the classification and the prediction of solar cycles are discussed. By using the method of fuzzy cluster analysis, a prediction for the 22nd solar cycle has been made. The results are as follows: the length of the declining time for the 21st cycle is eight or nine years; the beginning time for the 22nd cycle is the year 1987 or 1988; the first minimum of the year's mean value of the relative number is 4.3; the length of the ascending duration for the 22nd cycle is four years; the maximum of the year's mean value of the relative number is 118.9; and the length of the declining duration for the 22nd cycle is 6.5 or eight years.

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