In the knowledge economy time, enterprise's competitive power manifests in its knowledge superiority, therefore the knowledge management is also raised the agenda.

知识经济时代，企业的竞争力体现在其知识优势上，因此知识管理也被提上议事日程。

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Rough Sets theory has great superiority in Data Preprocessing because of its particular expression of knowledge, as well as it makes an effective means of knowledge Discovery in Database.

粗糙集理论由于其独特的知识表示方法在数据预处理方面有着得天独厚的优势，同时也成为数据库中知识发现的有效手段。

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This article discusses the definition and the superiority of the knowledge management, and puts the emphases on the policy of the knowledge management in knowledge economy.

本文从知识管理的含义出发，探讨了知识管理的优势，着重讨论了知识经济条件下实施知识管理的策略。

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