Enlightened by the idea of AIC, this paper treats the data of the same group as samples of certain distribution. In this way, it determines the number of groups by seeking the asymptotically unbiased estimate of Kullback-Leibler information.

• 在AIC准则思想的启发下，将应该同属于一个分类的数据看作是在某一分布中抽取的样本，从而通过求Kullback-Leibler信息量的渐近无偏估计而达到确定类数与数据分类的目的。