concept hierarchy

• 概念层次

concept hierarchy的用法和样例：

例句

1. Successful utilization of domain knowledge in this phase requires extending basic data mining algorithms to deal with relational data to concept hierarchies.
   在模式发现阶段领域知识的成功应用还需要数据挖掘算法来执行从关系数据到概念层次的处理。