对非相关文献知识发现中初始文本集结构的试验研究

Experimental Research on the Structure of the Original Collection in Disjoint Literature-Based Discovery

本文尝试分析在非相关文献知识发现中，标题对文摘的替代效果，标题和MeSH提供的信息内容与文摘提供的信息内容的近似度，标题与文摘提供的信息内容与MeSH字段提供的信息内容的近似度。通过统计各字段所有词的词频．从高频词的数量、分布及变化趋势等定量的方面，以及具体高频词和语义类型等定性方面对各字段进行对比分析。结果表明标题对文摘有很好的替代效果，标题与MeSH结合对文摘的替代效果较标题与文摘结合对MeSH的替代效果要好。

The authors explore the effect of title instead of abstract, the similarity among title, MeSH and abstract providing the information content of literatures in disjoint-literature based discovery. The experimental research methods include statistics of words numbers and their frequency in three fields. Then this paper analyzes the distribution and changing trend of shared or unique high frequency terms of the three fields, and specific high frequency terms and their semantic types. The results show that title can substitute abstract, the combination of title and MeSH can substitute abstract, the combination of title and abstract can substitute MESH, hut the effect of the former is better than that of the latter.