摘要
通过词频分析和共词分析等方法,以中国知网(CNKI)数据库为数据源,对1995-2009年失效专利相关论文进行分析。采用多元统计方法中的因子分析、聚类分析、多维尺度分析等方法,分析我国现阶段失效专利研究的现状、热点及趋势。
Based on the data from CNKI, this paper analyses the academic papers about expired patents from 1995 to 2009 by means of word frequency analysis and co-word analysis and studies the status, the hot issues and the trend of the expired patent research with factor analysis, cluster analysis and multi-dimensional analisis.
出处
《图书情报研究》
2010年第3期33-36,46,共5页
Library and Information Studies
关键词
失效专利
词频分析
共词分析
多元统计方法
expired patent
word frequency analysis
co-word analysis
multi-statistical analysis
