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中国高影响力医学论文的医院排序报告
热度 1 zhpd55 2014-8-27 08:26
中国高影响力医学论文的医院排序报告 诸平 “ 中国高影响力医学论文的医院分布报告 ”是以论文被引总数进行排序,列出了前50家医院,但是如果按照篇均被引频次进行排序,结果则是另外一番情景,论文总数最后一名,被引次数排序第33的上海第二医科大学仁济医院名列榜首;论文总数排名第43,被引次数排序第15的北京积水潭医院篇均被引频次排序第二;复旦大学华山医院论文总数排序第18,被引总数排序第9,篇均被引频次排序第三,其他单位篇均被引频次排序结果见表1。 由图1可以看出,虽然总被引频次与论文数量有正比关系,但是,篇均被引频次与论文数量之间的关系不明显,在某种程度上有发表关系。所以使用篇均被引频次排序可能更为科学合理一些。 图1 论文总数与总被引频次以及篇均被引频次关系图 表1 篇均被引频次TOP50排序结果
个人分类: 新观察|3165 次阅读|2 个评论
国际合作被引高峰期可能会滞后10年
热度 2 zhpd55 2013-3-27 11:00
在博文“ 论文数量长9倍,平均被引名落孙山的原因何在? ”中,引用了汤森路透知识产权与科技研究主管乔纳森•亚当斯为英国《金融时报》的撰稿——“ 西方应将科学家派往中国 ”。其中谈到国际合作研究对被引频次的影响问题,并列举了英国作为例证。为了进一步了解中国大陆地区与英国、日本、美国以及英国的相关情况,我们通过 Scopus 数据库资料对其进行比较,结果如下: 1)年度发表论文数量的变化 图1年度发表论文数量的变化 2)篇均被引频次的变化 图2篇均被引频次的变化 3)篇均他引频次变化 图3篇均他引频次变化 4)国际合作度(论文中与国外合作研究成果所占比例/%) 图4国际合作度变化 5)H指标比较 图5H指标比较 6)国际合作与篇均它引频次的相关性 图6国际合作与篇均它引频次的相关性 从图6我们可以看出,国际合作研究的比例越高,相应的篇均他引频次就高。但是篇均他引频次的高峰期会滞后10年,无论是英国、美国、日本还是中国大陆地区(见图7)均有这种局势。在2003年之后,也有国际合作度越高,篇均他引频次越高的态势,但是相关性不甚明显,而2003年之前的篇均他引频次与国际合作度相对关系比较更紧密一些。 7)中国大陆地区国际合作与篇均他引的相关性(Since1996) 中国2003年的国际合作度为 20.051%,篇均他引频次为4.626,是1996-2011年之间篇均他引频次最高的一年。但是,2003-2005年之间国际合作度逐年下降,2005-2011年之间一直维持在15%左右(见图4)。如果按照乔纳森•亚当斯的观点,我们从现在起开始重视国际化合作研究,提高 国际合作度,争取在近几年内达到或者接近日本的国际化合作水平,那么我们大陆地区的被引频次的高峰期可能会在2023年左右才会出现。 图7中国大陆地区国际合作与篇均他引的相关性
个人分类: 新观察|3860 次阅读|3 个评论
化学领域世界百强人与我无缘
zhpd55 2011-4-8 08:28
2011年2月10日 Thomson Reuters 公布的Top 100 Chemists, 2000-2010排名榜,其中有华人,但是没有一位是来自CHINA(包括港澳台)的高校或者研究机构。本次公布的遴选结果,入围的基本条件是有50篇或者以上的论文,再按照篇均被引频次进行排序, 而不是按照论文发表期刊的影响因子或者发表论文数量的多少,衡量强人的评价指标显然可见,追求数量和以刊论文并非凑效 。百强人排行榜如下: Top 100 Chemists, 2000-2010, Ranked by Citation Impact (among those with 50 or more papers) Rank Scientists Papers Citations Impact 1 Charles M. LIEBER Harvard University 74 17,776 240.22 2 Omar M. YAGHI University of California Los Angeles 90 19,870 220.78 3 Michael O’KEEFFE Arizona State University 73 12,910 176.85 4 K. Barry SHARPLESS Scripps Research Institute 60 9,754 162.57 5 A. Paul ALIVISATOS University of California Berkeley 93 14,589 156.87 6 Richard E. SMALLEY† Formerly Rice University 60 9,217 153.62 7 Hongjie DAI Stanford University 88 12,768 145.09 8 Xiaogang PENG University of Arkansas 59 8,548 144.88 9 Valery V. FOKIN Scripps Research Institute 54 6,853 126.91 10 Peidong YANG University of California Berkeley 95 11,167 117.55 11 Benjamin LIST Max Planck Institute for Coal Research 81 8,808 108.74 12 Mark E. THOMPSON University of Southern California 53 5,394 101.77 13 Robert H HAUGE Rice University 55 5,566 101.20 14 Eric N. JACOBSEN Harvard University 81 7,985 98.58 15 Banglin CHEN University of Texas San Antonio 61 5,929 97.20 16 David W.C. MACMILLAN Princeton University 55 5,267 95.76 17 Mostafa EL-SAYED Georgia Institute of Technology 111 10,135 91.31 18 Ezio RIZZARDO Commonwealth Scientific And Industrial Research Organization (CSIRO), Australia 52 4,747 91.29 19 Michael S. STRANO Massachusetts Institute of Technology 54 4,843 89.69 20 Michael J. ZAWOROTKO University of South Florida 83 7,403 89.19 21 Dmitri V. TALAPIN University of Chicago 56 4,981 88.95 22 Ryoji NOYORI Nagoya University 62 5,486 88.48 23 Chad A. MIRKIN Northwestern University 233 20,505 88.00 24 Liberato MANNA Italian Institute of Technology 62 5,431 87.60 25 Richard P. VAN DUYNE Northwestern University 88 7,690 87.39 26 Robert H. GRUBBS California Institute of Technology 170 14,617 85.98 27 Carlos F. BARBAS Scripps Research Institute 95 8,029 84.52 28 James R. HEATH California Institute of Technology 69 5,830 84.49 29 Moungi G. BAWENDI Massachusetts Institute of Technology 52 4,364 83.92 30 David A. CASE Rutgers University 60 5,007 83.45 31 Shouheng SUN Brown University 84 6,970 82.98 32 Catherine J. MURPHY University of Illinois Urbana-Campaign 69 5,717 82.86 33 M. G. FINN Scripps Research Institute 76 6,286 82.71 34 Stephen L. BUCHWALD Massachusetts Institute of Technology 169 13,941 82.49 35 Younan XIA Washington University St. Louis 161 13,120 81.49 36 Stuart L. SCHREIBER Harvard University 66 5,369 81.35 37 Taeghwan HYEON Seoul National University 82 6,587 80.33 38 George M. WHITESIDES Harvard University 228 18,237 79.99 39 Ryong RYOO Korea Advanced Institute of Science and Technology 77 6,057 78.66 40 Michael F. RUBNER Massachusetts Institute of Technology 51 4,004 78.51 41 Xiangfeng DUAN University of California Los Angeles 64 5,022 78.47 42 Michael GRTZEL Swiss Federal Institute of Technology Lausanne 187 14,602 78.09 43 Gregory C. FU Massachusetts Institute of Technology 111 8,384 75.53 44 Horst WELLER University of Hamburg 73 5,428 74.36 45 Joan F. BRENNECKE University of Notre Dame 65 4,827 74.26 46 Kenneth R. SEDDON Queen’s University Belfast 94 6,916 73.57 47 Alan J. HEEGER University of California Santa Barbara 66 4,758 72.09 48 Andreas MANZ Korea Institute of Science and Technology - Europe 70 5,030 71.86 49 Hua Chun ZENG National University of Singapore 53 3,673 69.30 50 Suprakas Sinha RAY Council for Scientific and Industrial Research (CSIR), South Africa 50 3,411 68.22 51 Mikhail E. ITKIS University of California Riverside 60 4,069 67.82 52 Osamu TERASAKI Stockholm University 92 6,198 67.37 53 Shaik M. ZAKEERUDDIN Swiss Federal Institute of Technology Lausanne 63 4,204 66.73 54 Wenbin LIN University of North Carolina Chapel Hill 104 6,930 66.63 55 Yadong YIN University of California Riverside 57 3,787 66.44 56 John R. YATES Scripps Research Institute 86 5,696 66.23 57 Samuel I. STUPP Northwestern University 62 4,073 65.69 58 Prashant V. KAMAT University of Notre Dame 99 6,426 64.91 59 John D. HOLBREY Queen’s University Belfast 63 4,016 63.75 60 Jens K. NRSKOV Technical University of Denmark 122 7,736 63.41 61 Yugang SUN Argonne National Laboratory 93 5,896 63.40 62 Evgeny KATZ Clarkson University 97 6,147 63.37 63 Craig J. HAWKER University of California Santa Barbara 141 8,893 63.07 64 Christian SRRE Versailles Saint-Quentin-en-Yvelines University 72 4,517 62.74 65 Richard H FRIEND University of Cambridge 74 4,642 62.73 66 Jean M. J. FRCHET University of California Berkeley 209 12,985 62.13 67 James M. TOUR Rice University 134 8,325 62.13 68 Robert C. HADDON University of California Riverside 84 5,191 61.80 69 Peter J. STANG University of Utah 103 6,356 61.71 70 Nicholas A. KOTOV University of Michigan 78 4,809 61.65 71 F. Dean TOSTE University of California Berkeley 84 5,163 61.46 72 Michal KRUK City University of New York 54 3,315 61.39 73 Didier ASTRUC University Bordeaux I 114 6,883 60.38 74 Michael GIERSIG Free University of Berlin 55 3,310 60.18 75 George C. SCHATZ Northwestern University 202 12,116 59.98 76 Harold G. CRAIGHEAD Cornell University 51 3,042 59.65 77 Keith FAGNOU† University of Ottawa 63 3,747 59.48 78 Milan MRKSICH University of Chicago 54 3,168 58.67 79 Alois FRSTNER Max Planck Institute for Coal Research 151 8,858 58.66 80 Karl Anker JRGENSEN Aarhus University 152 8,893 58.51 81 Rustem F. ISMAGILOV University of Chicago 59 3,437 58.25 82 Richard A. FIESNER Columbia University 98 5,697 58.13 83 Jairton DUPONT Federal University of Rio Grande do Sul 120 6,964 58.03 84 John F. HARTWIG University of Illinois Urbana-Campaign 167 9,638 57.71 85 Robert LANGER Massachusetts Institute of Technology 98 5,632 57.47 86 Mark E. DAVIS California Institute of Technology 66 3,791 57.44 87 Manos MAVRIKAKIS University of Wisconsin Madison 56 3,205 57.23 88 Adi EISENBERG McGill University 65 3,720 57.23 89 Maurice BROOKHART University of North Carolina Chapel Hill 87 4,978 57.22 90 Amir H. HOVEYDA Boston College 122 6,967 57.11 91 Charles R. MARTIN University of Florida 58 3,312 57.10 92 Alexander ZAPF University of Rostock 60 3,407 56.78 93 Jeffrey R. LONG University of California Berkeley 98 5,563 56.77 94 Neil R. CHAMPNESS University of Nottingham 86 4,877 56.71 95 Naomi J. HALAS Rice University 73 4,131 56.59 96 Abraham NITZAN Tel Aviv University 51 2,879 56.45 97 Charles L. BROOKS University of Michigan 67 3,778 56.39 98 Helmut CLFEN Max Planck Institute of Colloids and Interfaces 82 4,595 56.04 99 Jérme CORNIL University of Mons 65 3,640 56.00 100 Geoffrey W. COATES Cornell University 90 5,029 55.88 † = deceased SOURCE: Essential Science Indicators SM from Thomson Reuters , January 1, 2000 – October 31, 2010
个人分类: 新观察|4973 次阅读|0 个评论
化学:中国对于亚太区贡献最大
zhpd55 2011-4-2 08:45
根据汤姆逊-路透( Thomson Reuters )2011年3月27日公布的统计结果,亚太地区2000年元月至2010年12月底在国际重要期刊(即ISI Web of Knowledge数据库的收录期刊 )中发表化学论文在3000篇以上地区或国家中,中国(含港澳台)的发表论文总数名列第一,总数为201537篇,其中台湾省为20041篇,被引频次总数最多的也是中国,累计被引1432348篇次,但是篇均被引频次最高的是新加坡,篇均被引12.83次,全球排名第12;其次是澳大利亚,篇均被引12.44次,全球排名16;日本在亚太地区位于第三,篇均被引11.78次,全球排名19;前三甲篇均被引频次均超过全球篇均被引频次(11.19次/篇)。中国篇均7.11次,全球排名在30名之后,但是台湾省的篇均被引频次远高于大陆(包括港澳地区),台湾省为9.32次/篇,位于全球第26名;而大陆(包括港澳地区)只有6.86次/篇,全球排名49。 在过去30年之间(1981-2010),亚太地区的化学论文数量翻了一番多,从1981年占全球总数的19%上升到2010年的43%,在此期间,中国大陆(包括港澳地区)的贡献巨大,从1981年占全球总数的0.3%,到2010年年底已经超过20%,令人遗憾的就是数量的增长速度与质量的提高幅度有些不对称,篇均被引频次就是最好的例子。 详细统计结果见下面汤姆逊-路透( Thomson Reuters )的报道: Ranking of Asia-Pacific Nationsor Regionsin Chemistry, 2000-2010 Ranked by citation impact, among those publishing 3,000 or more papers. A-P Rank World Rank Region Papers Citations Citations Per Paper 1 12 Singapore 7,596 97,454 12.83 2 16 Australia 19,131 237,923 12.44 3 19 Japan 115,760 1,363,434 11.78 * * WORLD 1,197,020 13,394,419 11.19 4 23 New Zealand 3,257 34,755 10.67 5 24 South Korea 36,557 360,424 9.86 6 26 Taiwan 20,041 186,746 9.32 7 37 Thailand 3,955 27,730 7.01 8 38 India 64,903 451,536 6.96 9 39 China 181,496 1,245,602 6.86 10 45 Malaysia 5,365 22,461 4.19 SOURCE: Thomson Reuters Essential Science Indicators SM database, January 1, 2000 - December 31, 2010. The Asia-Pacific region has become the dominant producer of research papers in chemistry. The region now contributes some 43% of those published in the internationally influential journals indexed by Thomson Reuters. While the Asia-Pacific world share in the field has more than doubled in the past three decades (up from 19% in 1981), the world shares in chemistry for the European Union and for the United States have dropped significantly since the mid-1990s and now stand at 32% and 18%, respectively. Much of the Asia-Pacific region’s dramatic rise can be attributed to China, whose output in chemistry increased from a world share of .3% in 1981 to just over 20% now. While China takes the spotlight in terms of increased output in chemistry, within the Asia-Pacific region it is Singapore that excels in research impact, as measured by average citations to its chemistry papers. The table above lists the Asia-Pacific nations that published at least 3,000 papers in chemistry journals during 2000-2010, and ranks these nations or regionby citations per paper. This weighted measure allows for the analysis of large and smaller producers together. Despite its relatively small production, Singapore tops the ranking. At 12.83 citations per paper, Singapore’s papers were cited at a level 15% above the world average of 11.19. That also earned Singapore a rank of 12th globally. During 2000-2010, Singapore published 100 chemistry papers that qualified as highly cited, meaning that for their field and year of publication they ranked in the top 1% by total citations. Of the 100, the National University of Singapore (NUS) published 64, the Nanyang Technological University (NTU) published 29, and the Agency for Science, Technology and Research (A*STAR) research institutes, including the Institute of Bioengineering and Nanotechnology, the Institute of Microelectronics, and the Institute of Materials Research and Engineering, published 23 (the total of these surpass 100 owing to co-authorship). The establishment of the A*STAR research institutes and the production of these 100 highly cited papers undoubtedly did much to increase the citation impact of Singapore in chemistry from 7% below world average at the beginning of the decade to 24% above world average currently. For this analysis, data were extracted from the Essential Science Indicators database of Thomson Reuters. This database, currently covering the period January 2000 through December 2010, surveys only articles (original research reports and review articles) in journals indexed by Thomson Reuters. Articles are assigned to a field based on the journals in which they were published and Thomson Reuters journal-to-field scheme. Papers published in multidisciplinary journals such as Nature and Science are assigned to fields on an article-by-article basis. Both articles tabulated and citation counts to those articles are for the period indicated. For articles with multiple authors from different nations or regions, each nation or region receives full, not fractional, publication and citation credit. See Essential Science Indicators SM from Thomson Reuters for more information. http://sciencewatch.com/dr/sci/11/mar27-11_1D/ This item also appeared in the Times Higher Education magazine.
个人分类: 新观察|2066 次阅读|0 个评论
10年SCI论文之变有提升,篇均被引频次未进前20
zhpd55 2011-1-29 09:55
Thomson Reuters 公司公布了 2000 年元月到 2010 年 8 月底( 10 年零 8 个月)世界 100 多个国家和地区各个领域被 SCI 数据库收录在万篇以上的 统计结果 , 我国论文数量数量已经由 1999- 2009 年之间的第 5 位提 升 至第 4 位,在美国、日本、德国之后;被 引总数由 1999-2009 年之间的第 9 位提升至第 8 位,篇均被引频次由 1999-2009 年之间的 5.24 提升至 5.87 ,但是,按照篇均被引频次排名,未进前 20 名;同时较台湾地区的篇均被引频次( 6.88 )依然有 1.01 之差。因此我们在看到成绩的同时,更应该看到我们的差距,看到我们存在的不足,看到我们高被引论文和高被引作者的匮乏,十年之变列入表 1.2000-2010 年的 Thomson Reuters 公司统计结果见 http://sciencewatch.com/dr/cou/2010/10decALL/ 表 1 10 年 SCI 论文之变 时间段 论文总数 / 篇 被引总数 / 次 篇均被引数 / 次 篇均最高被引频次 1998-2008,08,31 573486 2646085 4.61 14.85 ( SWITZERLAND ) 1999-2009,08,31 649689 3404466 5.24 15.73 ( SWITZERLAND ) 2000-2010,08,31 719971 4227779 5.87 16.62 ( SWITZERLAND )
个人分类: SCI|4100 次阅读|0 个评论

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