The change of hit record set affects re call ratio and pertinency ratio greatly in the computer information retrieval.In this paper,the regularity of hit record set in the computer information retriev al is studied in...The change of hit record set affects re call ratio and pertinency ratio greatly in the computer information retrieval.In this paper,the regularity of hit record set in the computer information retriev al is studied in theory and in practice.It’s found both in the specific retriev al examples that the hit record set may remain unchanged,decrease,increase or be the combination of them with the increase or decrease of the retrieval facets in queries.It provides an essential basis for the research on the relations betwee n recall ratio and pertinency ratio.展开更多
本文从从文献计量的角度出发,在比较有代表性的Web Of Science数据库中进行检索,得到符合本文研究要求的数据。之后结合Citespace、VOSViewer等可视化工具,从发文数量、高被引文献、期刊的引证关系、关键词共现、作者共现等角度,对采集...本文从从文献计量的角度出发,在比较有代表性的Web Of Science数据库中进行检索,得到符合本文研究要求的数据。之后结合Citespace、VOSViewer等可视化工具,从发文数量、高被引文献、期刊的引证关系、关键词共现、作者共现等角度,对采集到的样本题录分析,从而得到国外计算情报学领域的发展情况。研究发现,年度统计的发文数量持续走高,高被引文献涉及到诸多领域,期刊的引证关系随着时间的增长涉及到的领域越来越多,研究热点与社会环境的发展有着密切的联系,说明计算情报学与社会发展之间有较高的契合度但是合著群体之间的交流较少,需要进一步加强。展开更多
文摘The change of hit record set affects re call ratio and pertinency ratio greatly in the computer information retrieval.In this paper,the regularity of hit record set in the computer information retriev al is studied in theory and in practice.It’s found both in the specific retriev al examples that the hit record set may remain unchanged,decrease,increase or be the combination of them with the increase or decrease of the retrieval facets in queries.It provides an essential basis for the research on the relations betwee n recall ratio and pertinency ratio.
文摘本文从从文献计量的角度出发,在比较有代表性的Web Of Science数据库中进行检索,得到符合本文研究要求的数据。之后结合Citespace、VOSViewer等可视化工具,从发文数量、高被引文献、期刊的引证关系、关键词共现、作者共现等角度,对采集到的样本题录分析,从而得到国外计算情报学领域的发展情况。研究发现,年度统计的发文数量持续走高,高被引文献涉及到诸多领域,期刊的引证关系随着时间的增长涉及到的领域越来越多,研究热点与社会环境的发展有着密切的联系,说明计算情报学与社会发展之间有较高的契合度但是合著群体之间的交流较少,需要进一步加强。