BACKGROUND Hepatitis C virus(HCV)poses a significant quandary about public health.It is challenging to study the literature in a particular discipline comprehensively today.One solution is bibliometric analysis,which ...BACKGROUND Hepatitis C virus(HCV)poses a significant quandary about public health.It is challenging to study the literature in a particular discipline comprehensively today.One solution is bibliometric analysis,which is often used to track the attributes and evolutionary trajectories of scientific outputs.AIM To examine the 35-year scientific evolution of articles focused on HCV.METHODS This study examined the 35-year scientific evolution of articles focused on HCV.Our study utilized the Web of Science database.The study encompassed a total of 11930 articles.RESULTS Regarding the cumulative count of articles,the leading countries are the United States,Japan,and Italy.Rice CM is the author with the highest recorded H-index and G-index values.The journal with the highest recorded H-index and G-index values is the Journal of Virology.The Journal of Viral Hepatitis contributed 10.94%of the articles,whereas the Journal of Virology published 9.68%.According to the strategic diagram,the keywords most frequently used in 2020-2022 are HCV,epidemiology,and sofosbuvir.CONCLUSION This study provides valuable information about 40 years of academic knowledge on HCV.展开更多
Purpose: The purpose of this study is to modernize previous work on science overlay maps by updating the underlying citation matrix, generating new clusters of scientific disciplines, enhancing visualizations, and pr...Purpose: The purpose of this study is to modernize previous work on science overlay maps by updating the underlying citation matrix, generating new clusters of scientific disciplines, enhancing visualizations, and providing more accessible means for analysts to generate their own maps Design/methodology/approach: We use the combined set of 2015 Journal Citation Reports for the Science Citation Index (n of journals = 8,778) and the Social Sciences Citation Index (n = 3,212) for a total of 11,365 journals. The set of Web of Science Categories in the Science Citation Index and the Social Sciences Citation Index increased from 224 in 2010 to 227 in 2015. Using dedicated software, a matrix of 227 × 227 cells is generated on the basis of whole-number citation counting. We normalize this matrix using the cosine function. We first develop the citing-side, cosine-normalized map using 2015 data and VOSviewer visualization with default parameter values. A routine for making overlays on the basis of the map ("wc 15.exe") is available at http://www.leydesdorff.net/wc 15/index.htm. Findings: Findings appear in the form of visuals throughout the manuscript. In Figures 1 9 we provide basemaps of science and science overlay maps for a number of companies, universities, and technologies. Research limitations: As Web of Science Categories change and/or are updated so is the need to update the routine we provide. Also, to apply the routine we provide users need access to the Web of Science. Practical implications: Visualization of science overlay maps is now more accurate and true to the 2015 Journal Citation Reports than was the case with the previous version of the routine advanced in our paper.Originality/value: The routine we advance allows users to visualize science overlay maps in VOSviewer using data from more recent Journal Citation Reports.展开更多
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. More in-depth analyses of each specialty would be more revealing by incorporating additional methods such as citation context analysis and studies of other aspects of scholarly publications.Practical implications: The underlying analytic process of science mapping serves many practical needs, notably bibliometric mapping, knowledge domain visualization, and visualization of scientific literature. In order to master such a complex process of science mapping, researchers often need to develop a diverse set of skills and knowledge that may span multiple disciplines. The approach demonstrated in this article provides a generic method for conducting a systematic review.Originality/value: Incorporating the evolutionary stages of a specialty into the visual analytic study of a research domain is innovative. It provides a systematic methodology for researchers to achieve a good understanding of how scientific fields evolve, to recognize potentially insightful patterns from visually encoded signs, and to synthesize various information so as to capture the state of the art of the domain.展开更多
The Western Yunnan Earthquake Predication Test Site set up jointly by the China Earthquake Administration,the National Science Foundation Commission of America,and United States Geological Survey has played an importa...The Western Yunnan Earthquake Predication Test Site set up jointly by the China Earthquake Administration,the National Science Foundation Commission of America,and United States Geological Survey has played an important role in development of early earthquake research work in China. Due to various objective reasons, most of the predicted targets in the earthquake prediction test site have not been achieved,and the development has been hindered. In recent years, the experiment site has been reconsidered,and renamed the "Earthquake Science Experimental Site". Combined with the current development of seismology and the practical needs of disaster prevention and mitigation,we propose adding the "Underground Cloud Map"as the new direction of the experimental site. Using highly repeatable, environmentally friendly and safe airgun sources,we could send constant seismic signals,which realizes continuous monitoring of subsurface velocity changes. Utilizing the high-resolution 3-D crustal structure from ambient noise tomography,we could obtain 4-D (3-D space+1-D time) images of subsurface structures, which we termed the "Underground Cloud Map". The"Underground Cloud Map" can reflect underground velocity and stress changes,providing new means for the earthquake monitoring forecast nationwide,which promotes the conversion of experience-based earthquake prediction to physics-based prediction.展开更多
为全面了解安全科学领域的研究发展,为相关人员提供重要的参考价值,采用了中国知网及Web of Science国内外数据库作为数据来源,利用可视化软件CiteSpace,对2010—2019年国内外安全科学领域的5种主要核心期刊文献进行整理并绘制知识图谱...为全面了解安全科学领域的研究发展,为相关人员提供重要的参考价值,采用了中国知网及Web of Science国内外数据库作为数据来源,利用可视化软件CiteSpace,对2010—2019年国内外安全科学领域的5种主要核心期刊文献进行整理并绘制知识图谱,分别从载文特点与研究主题、热点变化与演进趋势进行多维度对比分析。结果表明:①国内安全科学领域期刊载文量呈现增长趋势。②安全科学领域国内外研究偏好有所不同,国内期刊文献偏向于安全科学理论研究层次,国外期刊文献则更多地偏向于工程实践与行为人安全的分析与结合。③国内外安全科学领域演进趋势基本一致,演进趋势与计算机集成应用联系日益密切,多学科融合发展成为热点方向。展开更多
中国当下边疆旅游、乡村旅游与旅游扶贫的快速发展亟待理论支撑。社区生态旅游(CBET)聚焦于欠发达地区的生物多样性保护和可持续发展,在国际社会已形成相对成熟、不断进化的知识领域。以Web of Science中1991—2014年484篇相关文献为研...中国当下边疆旅游、乡村旅游与旅游扶贫的快速发展亟待理论支撑。社区生态旅游(CBET)聚焦于欠发达地区的生物多样性保护和可持续发展,在国际社会已形成相对成熟、不断进化的知识领域。以Web of Science中1991—2014年484篇相关文献为研究对象,运用文献计量工具CiteSpace Ⅲ绘制文献共被引和关键词共现网络知识图谱,重点考察转折点、高突现及高被引文献,厘清CBET的发展脉络、热点与趋势。研究发现:(1)CBET研究可分3阶段,即1991—1998年的萌芽期、1999—2007年的蓄势期及2008—2014年的发展期;(2)CBET研究涉及多个学科,生态-环境学是开拓与推动者,休闲-旅游学是实践引领者,社会-人类学是人本主义关怀的彰显者;(3)CBET25年发展历程中研究区域、对象、主体、热点、路径、方法不断演进,学科多元化、涉益方多维化研究趋势突出。质疑中求索的科学精神、本土化经验的理论提升是对中国未来CBET研究的两点重要启示。展开更多
为全面把握国际E-Science领域的研究主体、理论基础和发展趋势,以Web of Science数据库中13年来E-Science领域的研究论文作为分析对象,首先对研究文献进行计量分析,然后借助CiteSpace可视化软件分析国际E-Science领域的学科领域、研究...为全面把握国际E-Science领域的研究主体、理论基础和发展趋势,以Web of Science数据库中13年来E-Science领域的研究论文作为分析对象,首先对研究文献进行计量分析,然后借助CiteSpace可视化软件分析国际E-Science领域的学科领域、研究力量和代表作者,运用文献共被引分析剖析支撑该领域发展的关键文献分布,运用共词聚类分析揭示该领域的热点前沿和动态演进过程。展开更多
社会化媒体是一种新型在线媒体,发现并研究其中的社区有利于揭示社会化媒体环境下信息传播与共享的特点和规律。该文基于Web of Science检索得到的文献数据,使用CiteSpace、SATI、UCINET等科学知识图谱软件,从共被引文献、关键词及突现...社会化媒体是一种新型在线媒体,发现并研究其中的社区有利于揭示社会化媒体环境下信息传播与共享的特点和规律。该文基于Web of Science检索得到的文献数据,使用CiteSpace、SATI、UCINET等科学知识图谱软件,从共被引文献、关键词及突现词等角度构建了社会化媒体环境下有关社区发现的科学知识图谱,并对该领域的研究现状、知识演进过程、研究热点和研究前沿进行了可视化分析。展开更多
背景:基于主题文献的计量学和可视化分析对了解绝经后骨质疏松症研究基础与前沿尤为重要。目的:对近20年绝经后骨质疏松研究的高被引SCI论文进行文献计量、引证和可视化分析。方法:对Web of Science(WoS)中SCI-EXPANDED收录的2003-2022...背景:基于主题文献的计量学和可视化分析对了解绝经后骨质疏松症研究基础与前沿尤为重要。目的:对近20年绝经后骨质疏松研究的高被引SCI论文进行文献计量、引证和可视化分析。方法:对Web of Science(WoS)中SCI-EXPANDED收录的2003-2022年发表的前100篇高被引绝经后骨质疏松研究论文进行文献计量,用CiteSpace软件进行可视化分析。结果与结论:前100篇高被引论文在WoS核心合集中总被引量为67377次,每篇论文的年平均引用量为49.17次。绝经后骨质疏松研究主要涉及医学、工程技术、生物学和多学科等领域,小类学科则以内分泌学与代谢、医学:内科为主。国际上形成了稳定密切的核心合作网络关系,美国、加利福尼亚大学系统、Cummings,Steven R分别是高被引论文发文最多的国家、科研机构和作者。绝经后骨质疏松研究前沿主要涉及了钙剂、维生素D的补充治疗与骨折风险,双膦酸盐类药物治疗绝经后骨质疏松的临床研究,非典型股骨骨折,绝经后骨质疏松的新药临床研究与序贯治疗,骨折风险的预测指标,骨质疏松性椎体压缩骨折的中长期随访,基因多态性和遗传因素,绝经后骨质疏松临床实践指南的制定和更新等方面。大型的队列研究、高质量随机对照试验、系统综述和荟萃分析、临床实践指南是推动绝经后骨质疏松临床研究发展的巨大引擎。中国应在上述研究领域加大投入,以提高国际影响力。展开更多
社会化标签兴起后,其与本体的关联研究越来越受到国内外研究者的关注。基于Web of Science的检索数据,使用CiteSpace软件,从作者及国家、共被引文献及突现词等角度对本体与社会化标签关联研究的现状进行可视化分析。从研究人员及国家来...社会化标签兴起后,其与本体的关联研究越来越受到国内外研究者的关注。基于Web of Science的检索数据,使用CiteSpace软件,从作者及国家、共被引文献及突现词等角度对本体与社会化标签关联研究的现状进行可视化分析。从研究人员及国家来看,研究人员的合作程度较高,但是团体间的合作较少,另外,美国、德国、中国和澳大利亚的研究较多,且研究较早;从研究热点的发展来看,本体和社会化标签的关联研究由其与知识共享、与语义网及元数据的研究转变而来。在2008年后产生了多个研究热点,其中研究得最多的是用户生成内容、标签本体和标签推荐。展开更多
为全面分析绵羊繁殖周期的研究现状及变化趋势,本文采用文献计量学统计方法,分析Web of Science数据库中1936—2022年有关绵羊繁殖周期研究的4732篇文献,主要内容包括:被引文献、机构、作者、关键词、研究内容等,并使用CiteSpace 6.1 R...为全面分析绵羊繁殖周期的研究现状及变化趋势,本文采用文献计量学统计方法,分析Web of Science数据库中1936—2022年有关绵羊繁殖周期研究的4732篇文献,主要内容包括:被引文献、机构、作者、关键词、研究内容等,并使用CiteSpace 6.1 R6软件绘制网络知识图谱。结果:近年来国外绵羊繁殖周期相关发文量略有增长,我国对其关注度不断提高,相关领域科研支持大幅度提升;绵羊繁殖周期相关成果被引频次逐年增加,且与发文量成正比,各国之间有关科研领域交流正在不断增强;美国、英国、澳大利亚等国家对绵羊繁殖周期研究的成果较多,我国在该领域投入仍存在很大差距;针对主要机构及作者进行分析表明,机构、作者间的关联线比较密集;高频被引文献分析发现,绵羊繁殖周期的研究与营养需求和生理调节二者之间的关系密切;对关键词检索进行分析表明,与绵羊繁殖周期研究相关的高频热点词汇共有25个,在不同时间段,有一部分词汇会重复出现。通过以上分析,有利于加深研究前沿及成果的相互借鉴,提高绵羊养殖的效益产出,为提高我国绵羊繁殖性能提供参考和理论依据。展开更多
以Web of Science的SCI-E数据库1986年—2015年收录的8 917篇蚯蚓相关论文为研究对象,分析了蚯蚓研究的时间、领域及机构分布,并利用信息可视化软件Cite Space绘制关键词共现图谱和文献共被引图谱,探测高突现度关键词,分析了近30年蚯蚓...以Web of Science的SCI-E数据库1986年—2015年收录的8 917篇蚯蚓相关论文为研究对象,分析了蚯蚓研究的时间、领域及机构分布,并利用信息可视化软件Cite Space绘制关键词共现图谱和文献共被引图谱,探测高突现度关键词,分析了近30年蚯蚓研究领域的知识基础、研究热点和研究前沿等。展开更多
【目的】梳理国际上SWAT(Soil and Water Assessment Tool)模型研究进展,揭示SWAT模型研究发展趋势。【方法】汇总分析WebofScience(WOS)核心合集数据库中1994—2022年间与SWAT模型的相关论文,采用VOSviewer、Cite Space和基于R语言的Bi...【目的】梳理国际上SWAT(Soil and Water Assessment Tool)模型研究进展,揭示SWAT模型研究发展趋势。【方法】汇总分析WebofScience(WOS)核心合集数据库中1994—2022年间与SWAT模型的相关论文,采用VOSviewer、Cite Space和基于R语言的Biblioshiny3种文献计量工具对文献计量分析。从发文量、发文期刊、研究机构和作者影响力、高被引文献、关键词和主题演化等多个角度分析了SWAT模型的受关注程度、知识基础和研究前沿。【结果】(1)1994—2022年间SWAT模型研究领域论文共有3496篇,2006年后与该研究主题相关论文数量快速增长,2008年以来中国发文量迅速增长,在2019年超过了美国,成为全球SWAT模型研究发文量最多的国家。(2)SWAT模型研究的主要发文期刊有《JOURNAL OF HYDROLOGY》《HYDROLOGICAL PROCESSES》《WATER》等。最具影响力的国外发文作者是美国的SRINIVASAN R和ARNOLD J G,国内发文作者是沈珍瑶、陈磊、欧阳威等。(3)北京师范大学、德克萨斯农工大学、中国科学院大学、河海大学、武汉大学等是SWAT模型的重要研究机构。各国及各研究机构之间对于SWAT模型的研究密切合作,极大地推动了这一领域全球化发展。(4)SWAT模型应用研究领域主要集中在水资源、环境科学与生态学等学科。(5)SWAT模型研究的热点主要聚焦于径流模拟、土地利用和气候变化对水文过程影响的评估、土壤侵蚀、污染负荷等方面。【结论】未来SWAT的研究也面临着诸多挑战,讨论SWAT模型参数率定以及模型不确定性、不同流域尺度对于模型构建的影响、SWAT模型的改进、考虑多种应用情景下的模型耦合、气候变化和人类活动对水资源的影响将成为未来SWAT模型的研究重点。展开更多
文摘BACKGROUND Hepatitis C virus(HCV)poses a significant quandary about public health.It is challenging to study the literature in a particular discipline comprehensively today.One solution is bibliometric analysis,which is often used to track the attributes and evolutionary trajectories of scientific outputs.AIM To examine the 35-year scientific evolution of articles focused on HCV.METHODS This study examined the 35-year scientific evolution of articles focused on HCV.Our study utilized the Web of Science database.The study encompassed a total of 11930 articles.RESULTS Regarding the cumulative count of articles,the leading countries are the United States,Japan,and Italy.Rice CM is the author with the highest recorded H-index and G-index values.The journal with the highest recorded H-index and G-index values is the Journal of Virology.The Journal of Viral Hepatitis contributed 10.94%of the articles,whereas the Journal of Virology published 9.68%.According to the strategic diagram,the keywords most frequently used in 2020-2022 are HCV,epidemiology,and sofosbuvir.CONCLUSION This study provides valuable information about 40 years of academic knowledge on HCV.
文摘Purpose: The purpose of this study is to modernize previous work on science overlay maps by updating the underlying citation matrix, generating new clusters of scientific disciplines, enhancing visualizations, and providing more accessible means for analysts to generate their own maps Design/methodology/approach: We use the combined set of 2015 Journal Citation Reports for the Science Citation Index (n of journals = 8,778) and the Social Sciences Citation Index (n = 3,212) for a total of 11,365 journals. The set of Web of Science Categories in the Science Citation Index and the Social Sciences Citation Index increased from 224 in 2010 to 227 in 2015. Using dedicated software, a matrix of 227 × 227 cells is generated on the basis of whole-number citation counting. We normalize this matrix using the cosine function. We first develop the citing-side, cosine-normalized map using 2015 data and VOSviewer visualization with default parameter values. A routine for making overlays on the basis of the map ("wc 15.exe") is available at http://www.leydesdorff.net/wc 15/index.htm. Findings: Findings appear in the form of visuals throughout the manuscript. In Figures 1 9 we provide basemaps of science and science overlay maps for a number of companies, universities, and technologies. Research limitations: As Web of Science Categories change and/or are updated so is the need to update the routine we provide. Also, to apply the routine we provide users need access to the Web of Science. Practical implications: Visualization of science overlay maps is now more accurate and true to the 2015 Journal Citation Reports than was the case with the previous version of the routine advanced in our paper.Originality/value: The routine we advance allows users to visualize science overlay maps in VOSviewer using data from more recent Journal Citation Reports.
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. More in-depth analyses of each specialty would be more revealing by incorporating additional methods such as citation context analysis and studies of other aspects of scholarly publications.Practical implications: The underlying analytic process of science mapping serves many practical needs, notably bibliometric mapping, knowledge domain visualization, and visualization of scientific literature. In order to master such a complex process of science mapping, researchers often need to develop a diverse set of skills and knowledge that may span multiple disciplines. The approach demonstrated in this article provides a generic method for conducting a systematic review.Originality/value: Incorporating the evolutionary stages of a specialty into the visual analytic study of a research domain is innovative. It provides a systematic methodology for researchers to achieve a good understanding of how scientific fields evolve, to recognize potentially insightful patterns from visually encoded signs, and to synthesize various information so as to capture the state of the art of the domain.
基金sponsored by the National Natural Science Foundation of China(Grant Nos.41790463 and 41674058)
文摘The Western Yunnan Earthquake Predication Test Site set up jointly by the China Earthquake Administration,the National Science Foundation Commission of America,and United States Geological Survey has played an important role in development of early earthquake research work in China. Due to various objective reasons, most of the predicted targets in the earthquake prediction test site have not been achieved,and the development has been hindered. In recent years, the experiment site has been reconsidered,and renamed the "Earthquake Science Experimental Site". Combined with the current development of seismology and the practical needs of disaster prevention and mitigation,we propose adding the "Underground Cloud Map"as the new direction of the experimental site. Using highly repeatable, environmentally friendly and safe airgun sources,we could send constant seismic signals,which realizes continuous monitoring of subsurface velocity changes. Utilizing the high-resolution 3-D crustal structure from ambient noise tomography,we could obtain 4-D (3-D space+1-D time) images of subsurface structures, which we termed the "Underground Cloud Map". The"Underground Cloud Map" can reflect underground velocity and stress changes,providing new means for the earthquake monitoring forecast nationwide,which promotes the conversion of experience-based earthquake prediction to physics-based prediction.
文摘为全面了解安全科学领域的研究发展,为相关人员提供重要的参考价值,采用了中国知网及Web of Science国内外数据库作为数据来源,利用可视化软件CiteSpace,对2010—2019年国内外安全科学领域的5种主要核心期刊文献进行整理并绘制知识图谱,分别从载文特点与研究主题、热点变化与演进趋势进行多维度对比分析。结果表明:①国内安全科学领域期刊载文量呈现增长趋势。②安全科学领域国内外研究偏好有所不同,国内期刊文献偏向于安全科学理论研究层次,国外期刊文献则更多地偏向于工程实践与行为人安全的分析与结合。③国内外安全科学领域演进趋势基本一致,演进趋势与计算机集成应用联系日益密切,多学科融合发展成为热点方向。
文摘中国当下边疆旅游、乡村旅游与旅游扶贫的快速发展亟待理论支撑。社区生态旅游(CBET)聚焦于欠发达地区的生物多样性保护和可持续发展,在国际社会已形成相对成熟、不断进化的知识领域。以Web of Science中1991—2014年484篇相关文献为研究对象,运用文献计量工具CiteSpace Ⅲ绘制文献共被引和关键词共现网络知识图谱,重点考察转折点、高突现及高被引文献,厘清CBET的发展脉络、热点与趋势。研究发现:(1)CBET研究可分3阶段,即1991—1998年的萌芽期、1999—2007年的蓄势期及2008—2014年的发展期;(2)CBET研究涉及多个学科,生态-环境学是开拓与推动者,休闲-旅游学是实践引领者,社会-人类学是人本主义关怀的彰显者;(3)CBET25年发展历程中研究区域、对象、主体、热点、路径、方法不断演进,学科多元化、涉益方多维化研究趋势突出。质疑中求索的科学精神、本土化经验的理论提升是对中国未来CBET研究的两点重要启示。
文摘为全面把握国际E-Science领域的研究主体、理论基础和发展趋势,以Web of Science数据库中13年来E-Science领域的研究论文作为分析对象,首先对研究文献进行计量分析,然后借助CiteSpace可视化软件分析国际E-Science领域的学科领域、研究力量和代表作者,运用文献共被引分析剖析支撑该领域发展的关键文献分布,运用共词聚类分析揭示该领域的热点前沿和动态演进过程。
文摘社会化媒体是一种新型在线媒体,发现并研究其中的社区有利于揭示社会化媒体环境下信息传播与共享的特点和规律。该文基于Web of Science检索得到的文献数据,使用CiteSpace、SATI、UCINET等科学知识图谱软件,从共被引文献、关键词及突现词等角度构建了社会化媒体环境下有关社区发现的科学知识图谱,并对该领域的研究现状、知识演进过程、研究热点和研究前沿进行了可视化分析。
文摘背景:基于主题文献的计量学和可视化分析对了解绝经后骨质疏松症研究基础与前沿尤为重要。目的:对近20年绝经后骨质疏松研究的高被引SCI论文进行文献计量、引证和可视化分析。方法:对Web of Science(WoS)中SCI-EXPANDED收录的2003-2022年发表的前100篇高被引绝经后骨质疏松研究论文进行文献计量,用CiteSpace软件进行可视化分析。结果与结论:前100篇高被引论文在WoS核心合集中总被引量为67377次,每篇论文的年平均引用量为49.17次。绝经后骨质疏松研究主要涉及医学、工程技术、生物学和多学科等领域,小类学科则以内分泌学与代谢、医学:内科为主。国际上形成了稳定密切的核心合作网络关系,美国、加利福尼亚大学系统、Cummings,Steven R分别是高被引论文发文最多的国家、科研机构和作者。绝经后骨质疏松研究前沿主要涉及了钙剂、维生素D的补充治疗与骨折风险,双膦酸盐类药物治疗绝经后骨质疏松的临床研究,非典型股骨骨折,绝经后骨质疏松的新药临床研究与序贯治疗,骨折风险的预测指标,骨质疏松性椎体压缩骨折的中长期随访,基因多态性和遗传因素,绝经后骨质疏松临床实践指南的制定和更新等方面。大型的队列研究、高质量随机对照试验、系统综述和荟萃分析、临床实践指南是推动绝经后骨质疏松临床研究发展的巨大引擎。中国应在上述研究领域加大投入,以提高国际影响力。
文摘社会化标签兴起后,其与本体的关联研究越来越受到国内外研究者的关注。基于Web of Science的检索数据,使用CiteSpace软件,从作者及国家、共被引文献及突现词等角度对本体与社会化标签关联研究的现状进行可视化分析。从研究人员及国家来看,研究人员的合作程度较高,但是团体间的合作较少,另外,美国、德国、中国和澳大利亚的研究较多,且研究较早;从研究热点的发展来看,本体和社会化标签的关联研究由其与知识共享、与语义网及元数据的研究转变而来。在2008年后产生了多个研究热点,其中研究得最多的是用户生成内容、标签本体和标签推荐。
文摘为全面分析绵羊繁殖周期的研究现状及变化趋势,本文采用文献计量学统计方法,分析Web of Science数据库中1936—2022年有关绵羊繁殖周期研究的4732篇文献,主要内容包括:被引文献、机构、作者、关键词、研究内容等,并使用CiteSpace 6.1 R6软件绘制网络知识图谱。结果:近年来国外绵羊繁殖周期相关发文量略有增长,我国对其关注度不断提高,相关领域科研支持大幅度提升;绵羊繁殖周期相关成果被引频次逐年增加,且与发文量成正比,各国之间有关科研领域交流正在不断增强;美国、英国、澳大利亚等国家对绵羊繁殖周期研究的成果较多,我国在该领域投入仍存在很大差距;针对主要机构及作者进行分析表明,机构、作者间的关联线比较密集;高频被引文献分析发现,绵羊繁殖周期的研究与营养需求和生理调节二者之间的关系密切;对关键词检索进行分析表明,与绵羊繁殖周期研究相关的高频热点词汇共有25个,在不同时间段,有一部分词汇会重复出现。通过以上分析,有利于加深研究前沿及成果的相互借鉴,提高绵羊养殖的效益产出,为提高我国绵羊繁殖性能提供参考和理论依据。
文摘以Web of Science的SCI-E数据库1986年—2015年收录的8 917篇蚯蚓相关论文为研究对象,分析了蚯蚓研究的时间、领域及机构分布,并利用信息可视化软件Cite Space绘制关键词共现图谱和文献共被引图谱,探测高突现度关键词,分析了近30年蚯蚓研究领域的知识基础、研究热点和研究前沿等。
文摘【目的】梳理国际上SWAT(Soil and Water Assessment Tool)模型研究进展,揭示SWAT模型研究发展趋势。【方法】汇总分析WebofScience(WOS)核心合集数据库中1994—2022年间与SWAT模型的相关论文,采用VOSviewer、Cite Space和基于R语言的Biblioshiny3种文献计量工具对文献计量分析。从发文量、发文期刊、研究机构和作者影响力、高被引文献、关键词和主题演化等多个角度分析了SWAT模型的受关注程度、知识基础和研究前沿。【结果】(1)1994—2022年间SWAT模型研究领域论文共有3496篇,2006年后与该研究主题相关论文数量快速增长,2008年以来中国发文量迅速增长,在2019年超过了美国,成为全球SWAT模型研究发文量最多的国家。(2)SWAT模型研究的主要发文期刊有《JOURNAL OF HYDROLOGY》《HYDROLOGICAL PROCESSES》《WATER》等。最具影响力的国外发文作者是美国的SRINIVASAN R和ARNOLD J G,国内发文作者是沈珍瑶、陈磊、欧阳威等。(3)北京师范大学、德克萨斯农工大学、中国科学院大学、河海大学、武汉大学等是SWAT模型的重要研究机构。各国及各研究机构之间对于SWAT模型的研究密切合作,极大地推动了这一领域全球化发展。(4)SWAT模型应用研究领域主要集中在水资源、环境科学与生态学等学科。(5)SWAT模型研究的热点主要聚焦于径流模拟、土地利用和气候变化对水文过程影响的评估、土壤侵蚀、污染负荷等方面。【结论】未来SWAT的研究也面临着诸多挑战,讨论SWAT模型参数率定以及模型不确定性、不同流域尺度对于模型构建的影响、SWAT模型的改进、考虑多种应用情景下的模型耦合、气候变化和人类活动对水资源的影响将成为未来SWAT模型的研究重点。