随着数据库中数据量越来越大，建立高效的、适用于大型数据库系统的分类算法已成为数据挖掘的一个挑战性问题。

With the larger and larger amount of data, it becomes a challenging problem to find an efficiency classification algorithm that adapts to large database.

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为了使特殊教育数据库系统具有较为理想的检索功能，本系统采用了分面分类技术、后控检索技术、超链接技术。

For enriching the database system of special education with ideal retrieval function, the facet classification, post controlled retrieval and hyper chaining techniques are employed.

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