中文摘要：

网上文件资源的共享与下载是当前网络用户的主要行为之一，而通过某些查询词进行搜索则是用户发现可下载资源的一个基本手段．该文提出了一种提取与筛选网上文件资源描述词语的方法，旨在为每一个文件资源找出一个关键词集合，使其尽可能地符合用户查询词集合．

英文摘要：

This paper describes a method for generating a set of keywords for a file, which is supposed to have strong similarity with the set of queries that a user most probably uses to search for the file. The generating procedure is presented and the algorithm is described in detail. Experiment is conducted to show the effectiveness of the method.