The e-mail network is a type of social network. This study analyzes user behavior in e-mail subject participation in organizations by using social network analysis. First, the Enron dataset and the position-related in...The e-mail network is a type of social network. This study analyzes user behavior in e-mail subject participation in organizations by using social network analysis. First, the Enron dataset and the position-related information of an employee are introduced, and methods for deletion of false data are presented. Next, the three-layer model(User, Subject, Keyword) is proposed for analysis of user behavior. Then, the proposed keyword selection algorithm based on a greedy approach, and the influence and propagation of an e-mail subject are defined. Finally, the e-mail user behavior is analyzed for the Enron organization. This study has considerable significance in subject recommendation and character recognition.展开更多
Purpose:To reveal the research hotpots and relationship among three research hot topics in b iomedicine,namely CRISPR,iPS(induced Pluripotent Stem)cell and Synthetic biology.Design/methodology/approach:We set up their...Purpose:To reveal the research hotpots and relationship among three research hot topics in b iomedicine,namely CRISPR,iPS(induced Pluripotent Stem)cell and Synthetic biology.Design/methodology/approach:We set up their keyword co-occurrence networks with using three indicators and information visualization for metric analysis.Findings:The results reveal the main research hotspots in the three topics are different,but the overlapping keywords in the three topics indicate that they are mutually integrated and interacted each other.Research limitations:All analyses use keywords,without any other forms.Practical implications:We try to find the information distribution and structure of these three hot topics for revealing their research status and interactions,and for promoting biomedical developments.Originality/value:We chose the core keywords in three research hot topics in biomedicine by using h-index.展开更多
为了解国内外土壤微生物的最新研究热点和发展趋势,借助Web of Science中SCI-EXPANDED数据库,利用VOSviewer、CiteSpace可视化分析软件等工具,对1990—2018年间发表的关于土壤微生物研究文献的国家、研究机构、期刊来源、主要研究内容...为了解国内外土壤微生物的最新研究热点和发展趋势,借助Web of Science中SCI-EXPANDED数据库,利用VOSviewer、CiteSpace可视化分析软件等工具,对1990—2018年间发表的关于土壤微生物研究文献的国家、研究机构、期刊来源、主要研究内容及关注热点进行计量分析。结果表明,该领域的中国发文量呈快速增长趋势,但总被引频次较低;美国的发文量、总被引频次均位于首位。中国科学院是重要的研究机构,其发文量、总被引频次均位于第一,但篇均被引频次较低。主要的期刊来源有Applied and Environmental Microbiology、Soil Biology&Biochemistry等。国内关键词共现网络形成较晚,但发展速度较快,表现出同国外研究热点趋同的发展趋势。国内外研究热点主要集中于土壤微生物参与土壤有机质分解、碳氮养分循环、对污染土壤的微生物降解和修复作用、环境条件变化对土壤微生物群落结构多样性的影响、植物-微生物相互作用机理等。本文对了解土壤微生物研究领域的发展态势具有一定参考价值。展开更多
[目的]分析我国循证中医护理发展现状以及存在的不足,为今后发展提供借鉴。[方法]通过检索中国知网数据库、维普数据库、万方数据知识服务平台、中国生物医学文献数据库、Web of Science、Cochrane Library关于循证中医护理的文献,利用...[目的]分析我国循证中医护理发展现状以及存在的不足,为今后发展提供借鉴。[方法]通过检索中国知网数据库、维普数据库、万方数据知识服务平台、中国生物医学文献数据库、Web of Science、Cochrane Library关于循证中医护理的文献,利用文献计量学方法、社会网络化分析、系统评价再评价等方法对纳入的文献进行多维度分析。[结果]共纳入109篇文献,通过分析获知我国循证中医护理研究相对较少,内容较局限,理论性研究多于实践性研究,机构合作欠缺,作者合作少,基金资助少,文献质量不高。[结论]循证中医护理发展仍处于初期发展阶段,应拓展研究的广度和深度,理论与实践共同发展,加强机构间的合作,加大基金投入,提高研究质量,以此推动中医护理的发展。展开更多
基金sponsored by the National Natural Science Foundation of China under grant number No.61100008,61201084the China Postdoctoral Science Foundation under Grant No.2013M541346+3 种基金Heilongiiang Postdoctoral Special Fund(Postdoctoral Youth Talent Program)under Grant No.LBH-TZ0504Heilongjiang Postdoctoral Fund under Grant No.LBH-Z13058the Natural Science Foundation of Heilongjiang Province of China under Grant No.QC2015076The Fundamental Research Funds for the Central Universities of China under grant number HEUCF100602
文摘The e-mail network is a type of social network. This study analyzes user behavior in e-mail subject participation in organizations by using social network analysis. First, the Enron dataset and the position-related information of an employee are introduced, and methods for deletion of false data are presented. Next, the three-layer model(User, Subject, Keyword) is proposed for analysis of user behavior. Then, the proposed keyword selection algorithm based on a greedy approach, and the influence and propagation of an e-mail subject are defined. Finally, the e-mail user behavior is analyzed for the Enron organization. This study has considerable significance in subject recommendation and character recognition.
基金the National Natural Science Foundation of China Grant 71673131 for financial support
文摘Purpose:To reveal the research hotpots and relationship among three research hot topics in b iomedicine,namely CRISPR,iPS(induced Pluripotent Stem)cell and Synthetic biology.Design/methodology/approach:We set up their keyword co-occurrence networks with using three indicators and information visualization for metric analysis.Findings:The results reveal the main research hotspots in the three topics are different,but the overlapping keywords in the three topics indicate that they are mutually integrated and interacted each other.Research limitations:All analyses use keywords,without any other forms.Practical implications:We try to find the information distribution and structure of these three hot topics for revealing their research status and interactions,and for promoting biomedical developments.Originality/value:We chose the core keywords in three research hot topics in biomedicine by using h-index.
文摘为了解国内外土壤微生物的最新研究热点和发展趋势,借助Web of Science中SCI-EXPANDED数据库,利用VOSviewer、CiteSpace可视化分析软件等工具,对1990—2018年间发表的关于土壤微生物研究文献的国家、研究机构、期刊来源、主要研究内容及关注热点进行计量分析。结果表明,该领域的中国发文量呈快速增长趋势,但总被引频次较低;美国的发文量、总被引频次均位于首位。中国科学院是重要的研究机构,其发文量、总被引频次均位于第一,但篇均被引频次较低。主要的期刊来源有Applied and Environmental Microbiology、Soil Biology&Biochemistry等。国内关键词共现网络形成较晚,但发展速度较快,表现出同国外研究热点趋同的发展趋势。国内外研究热点主要集中于土壤微生物参与土壤有机质分解、碳氮养分循环、对污染土壤的微生物降解和修复作用、环境条件变化对土壤微生物群落结构多样性的影响、植物-微生物相互作用机理等。本文对了解土壤微生物研究领域的发展态势具有一定参考价值。
文摘[目的]分析我国循证中医护理发展现状以及存在的不足,为今后发展提供借鉴。[方法]通过检索中国知网数据库、维普数据库、万方数据知识服务平台、中国生物医学文献数据库、Web of Science、Cochrane Library关于循证中医护理的文献,利用文献计量学方法、社会网络化分析、系统评价再评价等方法对纳入的文献进行多维度分析。[结果]共纳入109篇文献,通过分析获知我国循证中医护理研究相对较少,内容较局限,理论性研究多于实践性研究,机构合作欠缺,作者合作少,基金资助少,文献质量不高。[结论]循证中医护理发展仍处于初期发展阶段,应拓展研究的广度和深度,理论与实践共同发展,加强机构间的合作,加大基金投入,提高研究质量,以此推动中医护理的发展。