Fuzzy statistic and comprehensive evaluating study for activity characterization of the active region

In this paper, the theory and method of the fuzzy mathematics are used to p robe the connection between the activity of the active region and character ization of the sunspot groups, to build the subordinating function accordin g to the relationship between them and to evaluate comprehensively the acti vity of the active region on the solar disk. The precise prediction of acti vity of the active regions has been obtained by data reduction and analysis . The predicting accuracy is higher than 95%. Forecast results indicate tha t the method of the fuzzy comprehensive evaluation is a good one for the so lar activity prediction.