, Volume 88, Issue 1, pp 133–144 | Cite as

Co-word analysis of the trends in stem cells field based on subject heading weighting

  • Xin Ying An
  • Qing Qiang WuEmail author


In this paper, co-word analysis is used to analyze the evolvement in stem cell field. Articles in the stem cell journals are downloaded from PubMed for analysis. Terms selection is one of the most important steps in co-word analysis, so the useless and the general subject headings are removed firstly, and then the major subject headings and minor subject headings are weighted respectively. Then, improved information entropy is exploited to select the subject headings with the experts consulting. Hierarchical cluster analysis is used to cluster the subject headings and the strategic diagram is formed to analyze the evolutionary trends in the stem cell field.


Subject heading weighting Co-word analysis Strategic diagram Information entropy Research front 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  1. 1.Institute of Medical InformationChinese Academy of Medical SciencesBeijingPeople’s Republic of China
  2. 2.School of SoftwareXiamen UniversityXiamen, FujianPeople’s Republic of China

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