【摘要】 目前困扰查询扩展的主要问题是主题漂移.为了降低主题漂移对查询扩展优化的影响,提出了一种基于任务上下文信息的查询扩展方法,旨在通过任务上下文中的信息来选择合适的查询扩展词添加到查询中,使得查询的结果更加精确.实验结果表明,该方法有效降低了主题漂移对查询扩展精度的影响.更多还原

【Abstract】 Topic drift phenomenon is the main problem of the query expansion optimization.To solve the problem,a query expansion method based on task context is proposed.It aims to improve the precision of query expansion by adding appropriate words chosen from task context.Experiments show that this method can get more relevant search results than other methods.更多还原