Purpose： We present a systematic review of the literature concerning major aspects of science mapping to serve two primary purposes： First, to demonstrate the use of a science mapping approach to perform the review ...Purpose： We present a systematic review of the literature concerning major aspects of science mapping to serve two primary purposes： First, to demonstrate the use of a science mapping approach to perform the review so that researchers may apply the procedure to the review of a scientific domain of their own interest, and second, to identify major areas of research activities concerning science mapping, intellectual milestones in the development of key specialties, evolutionary stages of major specialties involved, and the dynamics of transitions from one specialty to another.Design/methodology/approach： We first introduce a theoretical framework of the evolution of a scientific specialty. Then we demonstrate a generic search strategy that can be used to construct a representative dataset of bibliographic records of a domain of research. Next, progressively synthesized co-citation networks are constructed and visualized to aid visual analytic studies of the domain＇s structural and dynamic patterns and trends. Finally, trajectories of citations made by particular types of authors and articles are presented to illustrate the predictive potential of the analytic approach.Findings： The evolution of the science mapping research involves the development of a number of interrelated specialties. Four major specialties are discussed in detail in terms of four evolutionary stages： conceptualization, tool construction, application, and codification. Underlying connections between major specialties are also explored. The predictive analysis demonstrates citations trajectories of potentially transformative contributions.Research limitations： The systematic review is primarily guided by citation patterns in the dataset retrieved from the literature. The scope of the data is limited by the source of the retrieval, i.e. the Web of Science, and the composite query used. An iterative query refinement is possible if one would like to improve the data quality, although the current approach serves our purpose adequately.展开更多
本文通过检索Web of Science中有关大数据的论文,采用文献计量分析法、可视化分析法和内容分析法等对文献进行梳理,分析了该领域的研究现状和发展趋势,并从大数据基本理论、大数据存储与分析处理技术和大数据应用研究三个角度说明当前...本文通过检索Web of Science中有关大数据的论文,采用文献计量分析法、可视化分析法和内容分析法等对文献进行梳理,分析了该领域的研究现状和发展趋势,并从大数据基本理论、大数据存储与分析处理技术和大数据应用研究三个角度说明当前研究热点,对未来研究进行展望。展开更多
土壤是人类赖以生存的主要资源之一。土壤污染特别是重金属污染已经成为全球面临的一个亟待解决的问题。为了深入了解土壤重金属污染研究的全球状况和前沿动态,比较客观地反映相关国家在该领域的科学能力和科学影响,采用ISIWebofKnowle...土壤是人类赖以生存的主要资源之一。土壤污染特别是重金属污染已经成为全球面临的一个亟待解决的问题。为了深入了解土壤重金属污染研究的全球状况和前沿动态,比较客观地反映相关国家在该领域的科学能力和科学影响,采用ISIWebofKnowledge的WebofScience引文数据库,选用普通检索方式,以土壤重金属污染作为主题检索词,对1990～2008年之间该库收录的相关文献进行了计量分析。结果表明,美国土壤重金属污染发文量领先于其他国家,占全部发文量的15%;国际上发文量居前10位的期刊平均影响因子为2.608,最主要的期刊有Environmental Pollution、Science of the Total Environmental和Water Air and Soil Pollution;中国科学院、浙江大学和香港浸会大学的土壤重金属污染发文量在中国位居前3位。展开更多
为深入了解土壤环境中多环芳烃研究的全球状况和前沿动态,客观反映相关国家、机构和个人在该领域的科学能力和影响,采用ISI Web of Knowledge的Web of Science引文数据库,对1900—2014年间该库收录的土壤环境中多环芳烃研究领域的相关...为深入了解土壤环境中多环芳烃研究的全球状况和前沿动态,客观反映相关国家、机构和个人在该领域的科学能力和影响,采用ISI Web of Knowledge的Web of Science引文数据库,对1900—2014年间该库收录的土壤环境中多环芳烃研究领域的相关文献进行了计量分析。结果表明,该领域全球发文量总体呈持续快速上升趋势,美国的发文量、总被引频次和H指数均居榜首,中国的发文量和总被引频次居次席,但篇均被引频次明显偏低;中国科学院和英国兰卡斯特大学的发文量和H指数居研究机构的前两位,篇均被引频次排名最高的研究机构是美国马萨诸塞大学;英国兰卡斯特大学的Jones K C等两位学者发文量和H指数最高,北达克科特大学Hawthorne S B的篇均被引频次最高,国内学者中北京大学的陶澍和浙江大学的朱利中最有影响力;该领域的主要期刊有Environmental Science&Technology、Chemosphere和Environmental Pollution等;该领域的研究热点多集中于土壤环境中多环芳烃的降解及生物修复、多环芳烃在各介质中的溶解与吸附、以及多环芳烃的源解析等方向,"中国"相关研究在近5年中占重要地位。展开更多
以美国科学情报研究所(ISI)开发的基于Web的Web of Science网络数据库为数据源基础,对1993-2004年间SCI和SSCI收录的数字图书馆研究论文的情况,从论文的发表时间分布、期刊分布、被引频次分布、作者分布四个方面进行了统计与分析,初步...以美国科学情报研究所(ISI)开发的基于Web的Web of Science网络数据库为数据源基础,对1993-2004年间SCI和SSCI收录的数字图书馆研究论文的情况,从论文的发表时间分布、期刊分布、被引频次分布、作者分布四个方面进行了统计与分析,初步确定了数字图书馆领域的核心期刊、经典文献和核心作者。展开更多
Alzheimer’s disease is the most common cause of dementia.It is an increasingly serious global health problem and has a significant impact on individuals and society.However,the precise cause of Alzheimer’s disease i...Alzheimer’s disease is the most common cause of dementia.It is an increasingly serious global health problem and has a significant impact on individuals and society.However,the precise cause of Alzheimer’s disease is still unknown.In this study,11,748 Web-of-Science-indexed manuscripts regarding Alzheimer’s disease,all published from 2015 to 2019,and their 693,938 references were analyzed.A document co-citation network map was drawn using CiteSpace software.Research frontiers and development trends were determined by retrieving subject headings with apparent changing word frequency trends,which can be used to forecast future research developments in Alzheimer’s disease.展开更多
文摘Purpose： We present a systematic review of the literature concerning major aspects of science mapping to serve two primary purposes： First, to demonstrate the use of a science mapping approach to perform the review so that researchers may apply the procedure to the review of a scientific domain of their own interest, and second, to identify major areas of research activities concerning science mapping, intellectual milestones in the development of key specialties, evolutionary stages of major specialties involved, and the dynamics of transitions from one specialty to another.Design/methodology/approach： We first introduce a theoretical framework of the evolution of a scientific specialty. Then we demonstrate a generic search strategy that can be used to construct a representative dataset of bibliographic records of a domain of research. Next, progressively synthesized co-citation networks are constructed and visualized to aid visual analytic studies of the domain＇s structural and dynamic patterns and trends. Finally, trajectories of citations made by particular types of authors and articles are presented to illustrate the predictive potential of the analytic approach.Findings： The evolution of the science mapping research involves the development of a number of interrelated specialties. Four major specialties are discussed in detail in terms of four evolutionary stages： conceptualization, tool construction, application, and codification. Underlying connections between major specialties are also explored. The predictive analysis demonstrates citations trajectories of potentially transformative contributions.Research limitations： The systematic review is primarily guided by citation patterns in the dataset retrieved from the literature. The scope of the data is limited by the source of the retrieval, i.e. the Web of Science, and the composite query used. An iterative query refinement is possible if one would like to improve the data quality, although the current approach serves our purpose adequately.
文摘土壤是人类赖以生存的主要资源之一。土壤污染特别是重金属污染已经成为全球面临的一个亟待解决的问题。为了深入了解土壤重金属污染研究的全球状况和前沿动态,比较客观地反映相关国家在该领域的科学能力和科学影响,采用ISIWebofKnowledge的WebofScience引文数据库,选用普通检索方式,以土壤重金属污染作为主题检索词,对1990～2008年之间该库收录的相关文献进行了计量分析。结果表明,美国土壤重金属污染发文量领先于其他国家,占全部发文量的15%;国际上发文量居前10位的期刊平均影响因子为2.608,最主要的期刊有Environmental Pollution、Science of the Total Environmental和Water Air and Soil Pollution;中国科学院、浙江大学和香港浸会大学的土壤重金属污染发文量在中国位居前3位。
文摘为深入了解土壤环境中多环芳烃研究的全球状况和前沿动态,客观反映相关国家、机构和个人在该领域的科学能力和影响,采用ISI Web of Knowledge的Web of Science引文数据库,对1900—2014年间该库收录的土壤环境中多环芳烃研究领域的相关文献进行了计量分析。结果表明,该领域全球发文量总体呈持续快速上升趋势,美国的发文量、总被引频次和H指数均居榜首,中国的发文量和总被引频次居次席,但篇均被引频次明显偏低;中国科学院和英国兰卡斯特大学的发文量和H指数居研究机构的前两位,篇均被引频次排名最高的研究机构是美国马萨诸塞大学;英国兰卡斯特大学的Jones K C等两位学者发文量和H指数最高,北达克科特大学Hawthorne S B的篇均被引频次最高,国内学者中北京大学的陶澍和浙江大学的朱利中最有影响力;该领域的主要期刊有Environmental Science&Technology、Chemosphere和Environmental Pollution等;该领域的研究热点多集中于土壤环境中多环芳烃的降解及生物修复、多环芳烃在各介质中的溶解与吸附、以及多环芳烃的源解析等方向,"中国"相关研究在近5年中占重要地位。
文摘以美国科学情报研究所(ISI)开发的基于Web的Web of Science网络数据库为数据源基础,对1993-2004年间SCI和SSCI收录的数字图书馆研究论文的情况,从论文的发表时间分布、期刊分布、被引频次分布、作者分布四个方面进行了统计与分析,初步确定了数字图书馆领域的核心期刊、经典文献和核心作者。
文摘Alzheimer’s disease is the most common cause of dementia.It is an increasingly serious global health problem and has a significant impact on individuals and society.However,the precise cause of Alzheimer’s disease is still unknown.In this study,11,748 Web-of-Science-indexed manuscripts regarding Alzheimer’s disease,all published from 2015 to 2019,and their 693,938 references were analyzed.A document co-citation network map was drawn using CiteSpace software.Research frontiers and development trends were determined by retrieving subject headings with apparent changing word frequency trends,which can be used to forecast future research developments in Alzheimer’s disease.
