For information extraction, information filtering and suchlike Web application, we need segment this kind of original Web page into several appropriate information blocks as the preprocessing.

对于信息抽取、信息过滤等应用，需要首先将原始页面中分割为若干合适的信息块以便于后续的处理。

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As the rapidly growing information on Web, information filtering techniques have been more and more widely used.

随着互联网上信息的迅速增长，信息过滤技术得到越来越广泛的应用。

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URL classification is the base technology of search engine, URL filtering, web information management, so it becomes more and more important.

网页分类是搜索引擎、网页过滤、网络信息管理的技术基础，因此对网页分类的研究越来越重要。

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One part of Google is busy creating indexes of online information while at the same time filtering out "spam, " which in this context means Web sites whose only function is to make money off the fact you land on them, without providing any sort of "value-added" information in the process.

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