首页 | 官方网站   微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   212篇
  免费   14篇
文化教育   226篇
  2022年   1篇
  2021年   4篇
  2020年   8篇
  2019年   2篇
  2018年   5篇
  2017年   17篇
  2016年   14篇
  2015年   8篇
  2014年   17篇
  2013年   19篇
  2012年   8篇
  2011年   29篇
  2010年   6篇
  2009年   9篇
  2008年   7篇
  2007年   8篇
  2006年   15篇
  2005年   10篇
  2004年   12篇
  2003年   10篇
  2002年   4篇
  2001年   6篇
  2000年   5篇
  1999年   1篇
  1998年   1篇
排序方式: 共有226条查询结果,搜索用时 15 毫秒
91.
This paper provides information on a research project undertaken at the University of Arkansas in Fayetteville to study publications by the campus researchers with an emphasis on the STEM (agricultural sciences, physical science, biological sciences, engineering and mathematics, etc.) disciplines at the macro level for a 3-year period. The overall objective of the study was to provide evidence-based data of periodical use to assist with collection decisions and to identify collection strengths at the university level. We used the Web of Knowledge database (Science Citation Index, Social Science Citation Index, and Arts and Humanities Citation Index) to identify the periodical literature in which our researchers published and those that they cite in their publications. We also determined the extent to which our researchers are publishing in and citing periodicals from the Elsevier, Wiley, and IEEE journal packages. A methodology for extracting citations from Web of Knowledge into an Excel spreadsheet is also provided.  相似文献   
92.
An initial discussion of Scopus and its development was published in volume 49, number 3 of The Serials Librarian. This article updates readers on the continuing progress in its development, including the integration of research performance measurement tools, Web and patent references, and other additions that have been made from the fall of 2005 through September 2007. Additionally, this article details the strides made regarding content covered within Scopus, including the addition of seven million archive records in early 2007 and the agreement with ProQuest to link through to its arts and humanities selection through Scopus.  相似文献   
93.
《期刊图书馆员》2013,64(3-4):259-265
SUMMARY

This session presented several case studies of libraries facing challenges following a decision to move materials to an off-site storage facility. The presenters described the entire process of moving materials to an off-site location: from planning and selecting materials to organizing the collection off-site, with an emphasis on the unique problems created by serials. All three presenters shared strategies and decision-making methods with the audience.  相似文献   
94.
国外信息用户研究的文献计量分析   总被引:2,自引:0,他引:2  
文章应用文献计量学的方法对1999-2008年国外关于信息用户的研究论文,从年代分布、著者及合著情况、期刊分布及主题分布四个方面进行分析,并重点剖析了论文的主题特征,归纳国外信息用户研究领域的热点问题及其发展规律,以揭示国外信息用户研究的现状和发展趋势,为我国信息用户研究提供借鉴。  相似文献   
95.
以CNKI中相关文献的统计数据作为基础,对2002-2008年我国图书馆核心价值研究方面的论文进行了统计,从文献计量的角度对研究的整体状况进行了分析,并从图书馆核心价值的概念、意义、内容等方面做了综述。在此基础上,鉴于图书馆所具有的社会属性,提出图书馆核心价值是图书馆这一整体参与到的社会分工的观点。  相似文献   
96.
97.
A utility patent application may result in two citable documents: a published patent application (PPA) and a patent if the application is granted. Most analytic works consider only citations to the patent and ignore those to the PPA. This study gathers more than 270,000 U.S. utility patents granted in 2014 and their PPAs, and compares their citation counts up to 2018. Statistics show that citations to patents, on the average, account for less than 50 % of those to the patents and their PPAs combined together, indicating a significant underestimation to the value or impact of the patents. The degree of depreciation is worse when the time gaps between patents and their PPAs are longer, as the PPAs not only have accumulated citations for a longer period, but also individually, concurrently, and continuously receive citations after the patent is granted. This study further applies Main Path Analysis to a conventional citation network involving only citations to the patents and another network augmented with those to the PPAs, using empirical data from United States Patent and Trademark Office (USPTO) Cancer Moonshot Patent Data. The main path derived from the augmented network is almost entirely different from that of the conventional network.  相似文献   
98.
数据库的报道时差分析   总被引:1,自引:0,他引:1  
根据《中文核心期刊要目总览》(2000年第三版),针对其收录的中华医学系列期刊42种,分别利用4种与医学相关的国内有名的数据库《中国生物医学文献光盘数据库》(CBM)、《中文生物医学期刊文献数据库》(CMCC)、《中文科技期刊全文数据库》(VIP)和《中国学术期刊网全文数据库》(CNKI),分析数据库收录的这42种期刊的报道时差。结果发现中文数据库的报道时差较大,这应引起有关部门足够的重视。  相似文献   
99.
哈尔滨医科大学学术论文产出力与影响力研究报告   总被引:10,自引:0,他引:10  
利用CBMdisc、MEDLINE、CSCD等数据库,对哈尔滨医科大学发表的学术论文及被引证情况等进行产出力与影响力的文献计量学研究,旨在为科研管理部门提供科研绩效评价理论依据,并试图得出其对院校科研管理和科研水平产生积极推动作用的结论。  相似文献   
100.
文献计量学在科研评价中的应用进展   总被引:21,自引:1,他引:20  
从文献计量学在科研评价中的应用历史、实践和前景展望等方面综述了科研评价的文献计量学应用进展。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号