目录
摘要 II
关键词 II
Abstract. III
引言
引言 1
一、文献综述 1
二、数据来源与研究方法 2
（一）数据来源 2
（二）研究方法 3
1.标题词汇复杂度 3
（1）Herdans C 3
（2）ZScore 3
2.关键词词频统计 3
3.突变检测 4
4.关键词时间线图谱 4
三、结果与分析 4
（一）外部特征变化情况 4
1.论文年份分布 4
2.主要发文国家 5
3.主要发文机构 7
4.主要来源期刊 8
（二）内容特征变化情况 11
1.论文标题词汇复杂度 11
2.研究热点 12
3.学科研究趋势分析 13
4.国家研究主题演变 19
（1）美国 19
（2）中国 21
（3）中美间比较 24
四、研究结论 24
致谢 25
参考文献 25
ESI学科高被引论文特征的动态变化研究
摘 要
学科高被引论文的研究内容一定程度上代表了本领域研究的关键问题，科研人员通过跟踪学科高被引论文可以及时从侧面了解本学科的研究重点。目前高被引论文研究正成为国内外的关注热点，文章对其特征进行分析，以期为未来研究提供帮助。文章选取3期ESI生物学与生物化学、环境科学与生态学、分子生物学与遗传学领域的高被引论文为研究对象，首先对其从年份分布、发文国家、发文机构、来源期刊、标题词汇复杂度角度进行统计，分析全球高被引论文特征的动态变化现象，然后借助CiteSpace关键词词频统计、突变检测、时间线图谱等功能，分析学科研究热点及趋势。结果表明，生物学与生物化学、环境科学与生态学、分子生物学与遗传学领域全球高被引论文发展稳定，主要发文国家、主要发文机构、主要来源期刊、论文标题词汇复杂度变化不大，研究热点更新频繁。通过比较中美两国研究主题的演变，可以发现美国在各领域 *51今日免费论文网|www.51jrft.com +Q: ^351916072* 
都处于国际领先地位，中国的论文质量与其他国家相比仍然存在差距。
ANALYSIS ON THE DYNAMIC CHANGES OF CHARACTERISTICS OF HIGHLY CITED PAPERS BASED ON ESI
ABSTRACT
The research content of the highly cited papers represent the key issues in this field to some extent, and the researchers can understand the focus of the field from the side in time by tracking the highly cited papers. Highly cited paper is one of the hot topics of current domestic and international attention.The paper analyzes its characteristics in order to provide help for future research. The paper studies on some dynamic changes of characteristics of the global highly cited papers of biology&biochemistry, environment/ecology and molecular biology&genetics field based on three period data of ESI. The data are analyzed from the aspects of published time, research country, publishing institution, source journal and the vocabulary complexity of titles. The methods of keyword frequency statistics, burst detection and timeline in CiteSpace are used to analyse the research hotspots and research trends. The result shows that global highly cited papers in these fields are steadily developing. The major research countries, publishing institutions, source journals and the vocabulary complexity of titles have little change. The research hotspots of different countries are frequently updated. By comparing the evolution of research topics between China and the United States, the result shows that the United States is in the top position in the world of biology&biochemistry, environment/ecology and molecular biology&genetics field, and there is still a significant quality gap in published papers between China and other countries.

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