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Please predict whether this patent is acceptable.PATENT ABSTRACT: A method and system for classifying input data arrived one by one in time, is provided including: a) respectively training a group of classifiers with a predetermined number with recent or previous input data whose real classes are obtained as learning samples, wherein a number of the recent input data are increased progressively in reverse chronological order; b) selecting the classifier having the highest accuracy on the recent input data from the group of classifiers based on recent classifying results of the group of classifiers; and c) classifying current input data using the selected classifier.