中文摘要：

长尾理论自2004年提出以来,就受到各个领域学者的关注。为了解长尾理论研究的发文现状、主题演变、核心内容以及研究热点,文章在对长尾理论研究文献的年度发文量、发文机构、发文作者进行统计分析的基础上,利用知识图谱方法构建了2011-2015年长尾理论研究文献的主题词聚类图、主题词突现图和主题词发展时序图。分析结果显示：长尾理论研究可以划分为迅速发展期、平稳发展期和兴趣渐衰期三个发展阶段;并形成传统商业应用和互联网拓展应用两大聚类,多数突现词在2005年出现。发展时序图显示从传统商业应用第一类聚类向互联网拓展应用第二类聚类过渡的发展过程。

英文摘要：

Since long tail theory was put forward fields. In order to understand the research status, in 2004, it has been concerned by the scholars in various theme evolutions, core research contents and hot topics of long tail theory, this paper makes a statistical analysis of long tail theory research literature, including annual volume of publications, issuing institutions, and posting authors. After that the paper constructs keywords clustering diagram, highlight word map and the development time sequence diagraph of 201! -2015 using the method of mapping knowledge. The analysis results show that the research of long tail theory can be divided into the developing stages of rapid development period, stable development period and interest fading period. The theory was applied in both traditional business and Internet extention, and two clusters formed, while most of burst terms appeared in 2005. Sequence diagram of development indicates the transversion from the first cluster of applications in traditional business to the second cluster of Internet extertions.