Purpose:This paper introduces an analysis framework for tracking the evolution of research topics at the selected topics level,covering a research topic’s evolution trend,evolution path and its content changes over t...Purpose:This paper introduces an analysis framework for tracking the evolution of research topics at the selected topics level,covering a research topic’s evolution trend,evolution path and its content changes over time.Design/methodology/approach:After the topics were recovered by the author-topic model,we first built the keyword-topic co-occurrence network to track the dynamics of topic trends.Then a single-mode network was constructed with each node representing a topic and edge indicating the relationship between topics.It was used to illustrate the evolution path and content changes of research topics.A case study was conducted on the digital library research in China to verify the effectiveness of the analysis framework.Findings:The experimental results show that this analysis framework can be used to track evolution of research topics at a micro level and using social network analysis method can help understand research topics’evolution paths and content changes with the passage of time.Research limitations:Using the analysis framework will produce limited results when examining unstructured data such as social media data.In addition,the effectiveness of the framework introduced in this paper needs to be verified with more research topics in information science and in more scientific fields.Practical implications:This analysis framework can help scholars and researchers map research topics’evolution process and gain insights into how a field’s topics have evolved over time.Originality/value:Tbe analysis framework used in this study can help reveal more micro evolution details.The index to measure topic association strength defined in this paper reflects both similarity and dissimilarity between topics,which belps better understand research topics’evolution paths and content changes.展开更多
现有融合词语义和词空间结构的主题挖掘方法往往忽略了词空间结构中的高阶结构信息,阻碍了主题挖掘准确度的进一步提升。因此,该文提出一种基于高阶结构和语义融合的主题挖掘模型hssTM(Topic Mining based on high-order structures and...现有融合词语义和词空间结构的主题挖掘方法往往忽略了词空间结构中的高阶结构信息,阻碍了主题挖掘准确度的进一步提升。因此,该文提出一种基于高阶结构和语义融合的主题挖掘模型hssTM(Topic Mining based on high-order structures and semantics)。hssTM利用词嵌入技术获得词向量,通过“词共现”关系构建词网络,并通过挖掘词网络的高阶结构重构词网络,运用Graph Convolutional Network(GCN)与Autoencoder(AE)从重构后的词网络结构及词向量中学习表征词主题归属的隐向量。与现有4种主题挖掘模型对比的结果表明,所提hssTM模型在平均余弦相似性上提升了21%~300%,在平均欧氏距离上提升了12%~81%。展开更多
摘要Purpose:This paper introduces an analysis framework for tracking the evolution of research topics at the selected topics level,covering a research topic’s evolution trend,evolution path and its content changes over time.Design/methodology/approach:After the topics were recovered by the author-topic model,we first built the keyword-topic co-occurrence network to track the dynamics of topic trends.Then a single-mode network was constructed with each node representing a topic and edge indicating the relationship between topics.It was used to illustrate the evolution path and content changes of research topics.A case study was conducted on the digital library research in China to verify the effectiveness of the analysis framework.Findings:The experimental results show that this analysis framework can be used to track evolution of research topics at a micro level and using social network analysis method can help understand research topics’evolution paths and content changes with the passage of time.Research limitations:Using the analysis framework will produce limited results when examining unstructured data such as social media data.In addition,the effectiveness of the framework introduced in this paper needs to be verified with more research topics in information science and in more scientific fields.Practical implications:This analysis framework can help scholars and researchers map research topics’evolution process and gain insights into how a field’s topics have evolved over time.Originality/value:Tbe analysis framework used in this study can help reveal more micro evolution details.The index to measure topic association strength defined in this paper reflects both similarity and dissimilarity between topics,which belps better understand research topics’evolution paths and content changes.
摘要现有融合词语义和词空间结构的主题挖掘方法往往忽略了词空间结构中的高阶结构信息,阻碍了主题挖掘准确度的进一步提升。因此,该文提出一种基于高阶结构和语义融合的主题挖掘模型hssTM(Topic Mining based on high-order structures and semantics)。hssTM利用词嵌入技术获得词向量,通过“词共现”关系构建词网络,并通过挖掘词网络的高阶结构重构词网络,运用Graph Convolutional Network(GCN)与Autoencoder(AE)从重构后的词网络结构及词向量中学习表征词主题归属的隐向量。与现有4种主题挖掘模型对比的结果表明,所提hssTM模型在平均余弦相似性上提升了21%~300%,在平均欧氏距离上提升了12%~81%。