采用的是自顶向下划分，再由下向上归并的递归过程，实现此过程，被分类数据规模充分小条件设为16，即当数据规模小于等于16时。-Uses a top-down, broken down by the bottom-up merging of the recursive process to achieve this process, is sufficiently small-scale conditions of disaggregated data set to 16, that is, when the data size is less than equal to 16 .