【摘要】 XML信息检索中,提高检索准确率的有效途径就是基于反馈机制的用户查询扩展。根据反馈机制的不同,文章对国内外研究XML查询扩展的文献进行了分类分析,重点分析、比较了几篇有影响文献的扩展方法和实验结果。在深入分析的基础上提出了当前研究中存在的几点不足,并对未来的研究工作作出了一些简单的预测和展望。更多还原

【Abstract】 In Information Retrieval, query expansion based on feedback can improve precision effectively. According to the Differences of feedback mechanism the paper analyzes much literature about XML query expansion, and mainly focuses on the expansion methods and the experimental results. Lastly, the paper proposes some deficiencies existed in the current study, and makes simple prediction for the future.更多还原