文章摘要

何琳,黄水清,徐彩琴.基于重要句群检索性能比较研究[J].中国图书馆学报,2009,35(4):
基于重要句群检索性能比较研究
Comparative Research on Retrieval Effectiveness Based on Important Sentence Groups
  
DOI：
中文关键词: 重要句群,检索性能,检索评价,文献检索,比较研究
英文关键词: Important sentence groups,Retrieval effectiveness,Retrieval evaluation,Document retrieval,Comparative study
基金项目:
作者单位
何琳 南京农业大学信息管理系 南京 210095 
黄水清 南京农业大学信息管理系 南京 210095 
徐彩琴 南京农业大学信息管理系 南京 210095 
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中文摘要:
      重要句群是指最能表达文献主题的若干句子的集合，客观性强、生成效率高，可在利用自动文摘成果的基础上基于重要句群进行检索。在对句子进行预处理、文献语词权重计算以及句子权重计算后生成重要句群。利用基于向量模型的方法以及构建检索式和检索提问分别对基于文摘、重要句群和全文的检索性能进行对比分析。实验结果表明，基于重要句群的检索性能总体优于作者文摘，但是低于全文，可以将重要句群作为后台数据或搜索引擎的摘要等。句子级别的文本处理对提升文本检索效果的作用不大，而把文本处理提升至上下文的语义级别是可能的有效方法。图1。表4。参考文献9。
英文摘要:
Important sentence groups are sets of several sentences. It is objective with a high generating efficiency. We can retrieval based on them using results of automatic abstraction. Important sentence groups can be generated after pretreating sentences, weighting literature words and sentences. The paper compares and analysizes abstracts retrieval effectiveness with sentence groups and full text making use of VSM and constructing search strategy and questions. It concludes the result that the effectiveness of sentence group is better than abstract, worse than full text, which can be used as backstage database or abstract of search engine. However, text processing of sentences level doesnt play a significant role on promoting text retrieval effectiveness. Paragraph retrieval may be a useful approach to improve the effective way. 1 fig. 4 tabs. 9 refs.
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