首页 | 本学科首页   官方微博 | 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   248篇
  免费   4篇
  国内免费   19篇
教育   68篇
科学研究   84篇
各国文化   1篇
体育   1篇
综合类   7篇
文化理论   2篇
信息传播   108篇
  2023年   4篇
  2022年   5篇
  2021年   4篇
  2020年   3篇
  2019年   13篇
  2018年   18篇
  2017年   8篇
  2016年   7篇
  2015年   9篇
  2014年   12篇
  2013年   32篇
  2012年   14篇
  2011年   12篇
  2010年   16篇
  2009年   13篇
  2008年   11篇
  2007年   19篇
  2006年   16篇
  2005年   19篇
  2004年   10篇
  2003年   8篇
  2002年   4篇
  2001年   3篇
  2000年   1篇
  1999年   3篇
  1994年   1篇
  1993年   1篇
  1992年   2篇
  1990年   1篇
  1989年   2篇
排序方式: 共有271条查询结果,搜索用时 15 毫秒
1.
当代中国立法必须反映先进生产力的发展要求。本文在广泛收集资料,借鉴理论成果,了解立法现状的基础上,力求对社会经济领域的立法进行全面、客观、辩证的认识和分析,预测发展趋势,并针对现实立法中存在的问题提出一些建设性的构想,以期在已有理论成果的基础上实现创新,推动立法的现实发展。  相似文献   
2.
走向文本的历史档案数字整理:历史追溯与时代转型(下)   总被引:1,自引:0,他引:1  
数字人文是现代信息生态下解决历史档案因数量庞大以致人力无法逐件式地深入文本内容的因应之道。它对于历史档案整理的根本性影响,是推动时代转型并助力建立历史档案数字整理新范式。历史档案数字整理是层累地生成的数字文本系统。它由四个层次的数字文本组成,即文本阅读的基底层、元数据搭建的桥梁层、文本内数据化的加工层,以及数据分析和可视化的知识发现层,其中第二、三个层次的元数据、标记与注释等数据的结构化整理是实现知识发现的关键。"集成""互动"与"追问"是历史档案数字整理的核心理念。  相似文献   
3.
开放存取运动给传统学术出版业带来极大的冲击和挑战。对开放存取运动兴起的原因作了深入的分析,认为一是出版商对学术期刊出版的垄断和暴利经营,二是图书馆购买能力下降,三是信息技术的运用使学术期刊出版和传播的成本大为降低,四是现有的学术信息传播方式与研究人员的初衷相背离。  相似文献   
4.
文章介绍了英语学术界流行的若干论著体例,包括MLA、APA、Chicago、Vancouver、Harvard、Oxford等体例,指出英语学术界的学术规范体系对于中文学术规范体系的建立具有很强的借鉴意义。应在遵循基本规范的前提下保持各学科领域体例的相对自由和独立,积极发挥学术团体在规范制订中的作用,在强调规范约束力的同时加强对作者与编者的教育与指导,早日建立起中文学术界科学合理的学术规范体系。  相似文献   
5.
Academic libraries are increasingly seeking ways to demonstrate their impact on student learning. Acknowledgments - formal statements of indebtedness – in graduate theses and dissertations provide a rather unexplored area for demonstrating impact of the academic library on student learning. This study uses quantitative and qualitative methods to characterize acknowledgments of the Texas A&M University Libraries (TAMU Libraries) in theses and dissertations, both overall and for three disciplines specifically: civil engineering, geography, and history. This study also searched for mentions of the TAMU Libraries throughout the entire body of theses and dissertations. Overall, acknowledgments to the TAMU Libraries in theses and dissertations were less than 1%, though acknowledgments were found in all three disciplines with over a quarter of the history theses and dissertations containing an acknowledgment to libraries. There was no statistically significant difference found between the numbers of acknowledgments in theses versus dissertations. Acknowledgments to the TAMU Libraries were found in the theses and dissertations of 28 different departments. Mentions to the TAMU Libraries – not necessarily a formal acknowledgment – were found throughout the text of theses and dissertations with most concentrated in the acknowledgment, method, and bibliography sections.  相似文献   
6.
In 2008 Meier and Conkling first tested Google Scholar's coverage of the engineering literature against citations gathered from the Compendex database. Since that time, other studies have used the same methodology and found improvement in Google Scholar's coverage. This study uses engineering dissertations from Proquest Dissertations & Theses to create a data set of citations for the comparison of fee-based databases, Compendex and Scopus, against Google Scholar. From 1950 to 2017 Google Scholar outperformed both Compendex and Scopus in discoverability of citations in nine engineering subjects. These results have implications for collection management and information literacy program planning for librarians.  相似文献   
7.
Bibliometric methods for the analysis of highly specialized subjects are increasingly investigated and debated. Information and assessments well-focused at the specialty level can help make important decisions in research and innovation policy. This paper presents a novel method to approximate the specialty to which a given publication record belongs. The method partially combines sets of key values for four publication data fields: source, title, authors and references. The approach is founded in concepts defining research disciplines and scholarly communication, and in empirically observed regularities in publication data. The resulting specialty approximation consists of publications associated to the investigated publication record via key values for at least three of the four data fields. This paper describes the method and illustrates it with an application to publication records of individual scientists. The illustration also successfully tests the focus of the specialty approximation in terms of its ability to connect and help identify peers. Potential tracks for further investigation include analyses involving other kinds of specialized publication records, studies for a broader range of specialties, and exploration of the potential for diverse applications in research and research policy context.  相似文献   
8.
Citation averages, and Impact Factors (IFs) in particular, are sensitive to sample size. Here, we apply the Central Limit Theorem to IFs to understand their scale-dependent behavior. For a journal of n randomly selected papers from a population of all papers, we expect from the Theorem that its IF fluctuates around the population average μ, and spans a range of values proportional to σ/n, where σ2 is the variance of the population's citation distribution. The 1/n dependence has profound implications for IF rankings: The larger a journal, the narrower the range around μ where its IF lies. IF rankings therefore allocate an unfair advantage to smaller journals in the high IF ranks, and to larger journals in the low IF ranks. As a result, we expect a scale-dependent stratification of journals in IF rankings, whereby small journals occupy the top, middle, and bottom ranks; mid-sized journals occupy the middle ranks; and very large journals have IFs that asymptotically approach μ. We obtain qualitative and quantitative confirmation of these predictions by analyzing (i) the complete set of 166,498 IF & journal-size data pairs in the 1997–2016 Journal Citation Reports of Clarivate Analytics, (ii) the top-cited portion of 276,000 physics papers published in 2014–2015, and (iii) the citation distributions of an arbitrarily sampled list of physics journals. We conclude that the Central Limit Theorem is a good predictor of the IF range of actual journals, while sustained deviations from its predictions are a mark of true, non-random, citation impact. IF rankings are thus misleading unless one compares like-sized journals or adjusts for these effects. We propose the Φ index, a rescaled IF that accounts for size effects, and which can be readily generalized to account also for different citation practices across research fields. Our methodology applies to other citation averages that are used to compare research fields, university departments or countries in various types of rankings.  相似文献   
9.
标记事务影响着学者们对思考与写作系统的采纳使用。程序性标记和表示性标记会阻碍这一进程的发展,描述性标记则通过简化机械性任务,让学者们将注意力集中于内容上的做法,以加快这一进程。  相似文献   
10.
马歇尔计划并不仅仅限于以促进自由贸易和恢复生产为核心的经济援助,它的主管机构经济合作署还十分重视以美国企业文化影响欧洲企业的经营方式。经济合作署资助大量英国生产考察队赴美国企业实地观察,这些专业考察队在对美国相关部门先进的生产和管理方式有了一定了解后,通过发布考察队报告、举办论坛等方式向本国传播美国的生产技术和管理模式。经济合作署实际上是希望通过这些考察队来展示美国的生产技术、管理经验和经营理念,并采用美国经验来解决西欧企业生产中面临的问题。可是,美国的生产方式和管理经验并不一定具有普世性,在推行上难以达到所期望的目标。  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