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如何从大规模数据库中发掘深层次的知识和信息，而不仅仅是那些从传统数据库查询方法所获得的平凡内容，这方面的研究正受到越来越多的关注．作为一门独立于应用的研究课题，它已成为众多研究领域的热点内容，已经有相当多的应用报道并取得了丰硕的成果．本文试就数据采掘和知识发现的各方面内容：如采掘过程、方法、算法和应用等，作一个完整的回顾，文章也讨论了这一领域未来的工作和挑战．
How to discover deep knowledge and information from large-scale databases is not only the ordinary content obtained from the traditional database query methods, but more and more attention is being paid to the research. As a research subject independent of the application, it has become a hot topic in many fields of research. There have been quite a lot of applications reported and achieved fruitful results. This article examines various aspects of data mining and knowledge discovery: a complete review of mining processes, methods, algorithms, and applications, and discusses the future work and challenges in this area.