凡事要有目标、有计划、要努力

        Information retrieval is a computer science subfield whose goal is to find all documents relevant to a user query in a given collection of documents. As such, information retrieval should real

1 Introduction        The World WideWeb contains an enormous amount of information, but it can be exceedinglydicult for users to locate resources that are both high in quality and relevant to theirin

NutchNutch 是一个刚刚诞生开放源代码(open-source)的web搜索引擎。在它的主页有中文详细的说明。 http://nutch.sourceforge.net/docs/zh/about.htmlLuceneApache Lucene是一个开放源程序的搜寻器引擎，利用它可以轻易地为Java软件加入全文搜寻功能。Lucene的最主要工作是替文件的每一个字作索引，索引让搜寻的效率比传