A process method that only the ascendable circumstances of SPRSQ are considered and the delinable circumstances of SPRSQ are shielded, is used to calculate the best K value.

• 采用了一种“将SPR-SQ减小的情况屏蔽，只考虑SPRSQ增加的情况”的处理方法，来实现最佳聚类个数K的选择。