Conception Hierarchy Tree classifiers which is a statistical approach have played an important role in Attribute-Oriented Induction.

其中概念层次树作为一种统计类的数据分类方法在面向属性的归纳分类方法中起着重要作用。

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First, the paper defines the conception of value chain governance. And analysis four types of governance model:hierarchy, arm's length market, quasi hierarchy and network.

本文首先界定了价值链治理的概念，分析了价值链层级型、市场型、网络型、半层级型治理模式的特点。

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This paper is focused on the conception and hierarchy of flexibility and self-reflection as well as the approach to realize the flexibility.

就DSS的灵活性、自适应性的层次概念及其实现方法予以探讨。

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