Purpose:To analyze the diversity of citation distributions to publications in different research topics to investigate the accuracy of size-independent,rank-based indicators.The top percentile-based indicators are the...Purpose:To analyze the diversity of citation distributions to publications in different research topics to investigate the accuracy of size-independent,rank-based indicators.The top percentile-based indicators are the most common indicators of this type,and the evaluations of Japan are the most evident misjudgments.Design/methodology/approach:The distributions of citations to publications from countries and journals in several research topics were analyzed along with the corresponding global publications using histograms with logarithmic binning,double rank plots,and normal probability plots of log-transformed numbers of citations.Findings:Size-independent,top percentile-based indicators are accurate when the global ranks of local publications fit a power law,but deviations in the least cited papers are frequent in countries and occur in all journals with high impact factors.In these cases,a single indicator is misleading.Comparisons of the proportions of uncited papers are the best way to predict these deviations.Research limitations:This study is fundamentally analytical,and its results describe mathematical facts that are self-evident.Practical implications:Respectable institutions,such as the OECD,the European Commission,and the U.S.National Science Board,produce research country rankings and individual evaluations using size-independent percentile indicators that are misleading in many countries.These misleading evaluations should be discontinued because they can cause confusion among research policymakers and lead to incorrect research policies.Originality/value:Studies linking the lower tail of citation distribution,including uncited papers,to percentile research indicators have not been performed previously.The present results demonstrate that studies of this type are necessary to find reliable procedures for research assessments.展开更多
为揭示研究动态和启迪创新，将信息计量学研究引向深入。以《Journal of Informetrics》为样本，运用文献计量、内容分析等方法，从研究足迹和知识结构两个维度透视国际信息计量学近十年的发展脉络。研究表明：中、美、欧在科研产出上...为揭示研究动态和启迪创新，将信息计量学研究引向深入。以《Journal of Informetrics》为样本，运用文献计量、内容分析等方法，从研究足迹和知识结构两个维度透视国际信息计量学近十年的发展脉络。研究表明：中、美、欧在科研产出上呈“三足鼎立”之势，其中，比利时的天主教鲁汶大学和安特卫普大学以及中国的台湾大学的发文量排名前三；德国马普学会的博恩曼是发文最多的顶级专家，且在合作网络中居中心地位；知识基础由h- 指数及改进指标、引用测量及优化机制、科学学与科学管理等3 个知识集群构成；研究热点包括引文分析、h- 指数、影响因子、研究评价（绩效评估）等四大领域。展开更多
目的了解中国中医科学院1955年建院以来科技论文被SCIE收录情况,为今后科研发展战略规划的制定提供参考。方法以ISI Web of knowledgeSM检索平台上Science Citation Index Expanded及Journal Citation Reports数据库为依据,从论文数量...目的了解中国中医科学院1955年建院以来科技论文被SCIE收录情况,为今后科研发展战略规划的制定提供参考。方法以ISI Web of knowledgeSM检索平台上Science Citation Index Expanded及Journal Citation Reports数据库为依据,从论文数量、作者、所属机构发文数量、合作机构与合作国家(地区)、学科专业、基金资助机构、主要来源期刊及其引证数据、被引频次及施引国家(地区)等方面进行统计分析。结果 SCIE收录中国中医科学院科技论文共计510篇(含合著),全部发表于1980年以后,2006年以后发文数量快速增长,占发文总量的60%以上;涉及中、英、日3个语种,文献类型主要是期刊文献;核心作者大多是学科带头人;第一作者或通讯作者所属机构主要为中药研究所、西苑医院、广安门医院、针灸研究所及基础理论研究所;主要合作单位有北京大学、中国科学院、北京中医药大学等10余家;主要合作国家为日本及美国;研究领域主要集中在药理学与药剂学、全科医学与替代医学、药物化学等;在所有基金项目中,国家自然科学基金资助项目发表论文最多;载文核心期刊主要有20种;论文被引用率为54.7%,平均每篇被引4.07次。结论中国中医科学院SCIE科技论文数量在近5年内飞速增长,表明中国中医科学院科研实力与学术水平在不断提高,其学术国际影响力在逐年提升和扩大。展开更多
基于Web of Science数据库,对国际天然橡胶文献进行科学计量分析,追踪和揭示该领域的新兴趋势。结果表明:该领域形成了3个主要新兴趋势,即天然橡胶纳米复合材料中石墨烯/氧化石墨烯/碳纳米管的应用及其性能的提升;土地利用变化-热带雨...基于Web of Science数据库,对国际天然橡胶文献进行科学计量分析,追踪和揭示该领域的新兴趋势。结果表明:该领域形成了3个主要新兴趋势,即天然橡胶纳米复合材料中石墨烯/氧化石墨烯/碳纳米管的应用及其性能的提升;土地利用变化-热带雨林开垦为橡胶林对生态、水文和经济效应等的影响;外界刺激诱导表达的橡胶树胶乳中关键基因鉴定。突现性检测发现,绿色可持续科技、遥感和地质学是当前活跃的学科类别,高突现关键词"石墨烯"、"纳米管"、"种植园"、"光谱学"、"土地利用"和"基因表达"等也揭示了与主要新兴趋势的一致性。展开更多
文摘Purpose:To analyze the diversity of citation distributions to publications in different research topics to investigate the accuracy of size-independent,rank-based indicators.The top percentile-based indicators are the most common indicators of this type,and the evaluations of Japan are the most evident misjudgments.Design/methodology/approach:The distributions of citations to publications from countries and journals in several research topics were analyzed along with the corresponding global publications using histograms with logarithmic binning,double rank plots,and normal probability plots of log-transformed numbers of citations.Findings:Size-independent,top percentile-based indicators are accurate when the global ranks of local publications fit a power law,but deviations in the least cited papers are frequent in countries and occur in all journals with high impact factors.In these cases,a single indicator is misleading.Comparisons of the proportions of uncited papers are the best way to predict these deviations.Research limitations:This study is fundamentally analytical,and its results describe mathematical facts that are self-evident.Practical implications:Respectable institutions,such as the OECD,the European Commission,and the U.S.National Science Board,produce research country rankings and individual evaluations using size-independent percentile indicators that are misleading in many countries.These misleading evaluations should be discontinued because they can cause confusion among research policymakers and lead to incorrect research policies.Originality/value:Studies linking the lower tail of citation distribution,including uncited papers,to percentile research indicators have not been performed previously.The present results demonstrate that studies of this type are necessary to find reliable procedures for research assessments.
文摘目的了解中国中医科学院1955年建院以来科技论文被SCIE收录情况,为今后科研发展战略规划的制定提供参考。方法以ISI Web of knowledgeSM检索平台上Science Citation Index Expanded及Journal Citation Reports数据库为依据,从论文数量、作者、所属机构发文数量、合作机构与合作国家(地区)、学科专业、基金资助机构、主要来源期刊及其引证数据、被引频次及施引国家(地区)等方面进行统计分析。结果 SCIE收录中国中医科学院科技论文共计510篇(含合著),全部发表于1980年以后,2006年以后发文数量快速增长,占发文总量的60%以上;涉及中、英、日3个语种,文献类型主要是期刊文献;核心作者大多是学科带头人;第一作者或通讯作者所属机构主要为中药研究所、西苑医院、广安门医院、针灸研究所及基础理论研究所;主要合作单位有北京大学、中国科学院、北京中医药大学等10余家;主要合作国家为日本及美国;研究领域主要集中在药理学与药剂学、全科医学与替代医学、药物化学等;在所有基金项目中,国家自然科学基金资助项目发表论文最多;载文核心期刊主要有20种;论文被引用率为54.7%,平均每篇被引4.07次。结论中国中医科学院SCIE科技论文数量在近5年内飞速增长,表明中国中医科学院科研实力与学术水平在不断提高,其学术国际影响力在逐年提升和扩大。
文摘基于Web of Science数据库,对国际天然橡胶文献进行科学计量分析,追踪和揭示该领域的新兴趋势。结果表明:该领域形成了3个主要新兴趋势,即天然橡胶纳米复合材料中石墨烯/氧化石墨烯/碳纳米管的应用及其性能的提升;土地利用变化-热带雨林开垦为橡胶林对生态、水文和经济效应等的影响;外界刺激诱导表达的橡胶树胶乳中关键基因鉴定。突现性检测发现,绿色可持续科技、遥感和地质学是当前活跃的学科类别,高突现关键词"石墨烯"、"纳米管"、"种植园"、"光谱学"、"土地利用"和"基因表达"等也揭示了与主要新兴趋势的一致性。
