According to the properties of partition and merging, the hierarchy relation among condition classification, reduction and core is studied.
在对分类与归并性质充分研究的基础上，探讨了条件分类、约简与核的层次关系。
In data mining with Attribute-Oriented generalization (AOG), attribute reduction and concept generalization can not part from concept hierarchy.
在面向属性归纳(AOG)的数据挖掘中，属性归约及概念归纳都离不开概念层次。
In data mining with Attribute-Oriented generalization (AOG), attribute reduction and concept generalization can not part from concept hierarchy.
在面向属性归纳(AOG)的数据挖掘中，属性归约及概念归纳都离不开概念层次。
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