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   4697篇
  免费   199篇
  国内免费   4篇
教育   2814篇
科学研究   497篇
各国文化   40篇
体育   222篇
综合类   2篇
文化理论   79篇
信息传播   1246篇
  2024年   2篇
  2023年   9篇
  2022年   19篇
  2021年   23篇
  2020年   49篇
  2019年   83篇
  2018年   152篇
  2017年   195篇
  2016年   301篇
  2015年   184篇
  2014年   100篇
  2013年   426篇
  2012年   104篇
  2011年   164篇
  2010年   73篇
  2009年   59篇
  2008年   88篇
  2007年   151篇
  2006年   102篇
  2005年   775篇
  2004年   592篇
  2003年   299篇
  2002年   102篇
  2001年   81篇
  2000年   18篇
  1999年   52篇
  1998年   93篇
  1997年   80篇
  1996年   80篇
  1995年   67篇
  1994年   86篇
  1993年   90篇
  1992年   61篇
  1991年   11篇
  1990年   37篇
  1989年   9篇
  1988年   10篇
  1987年   8篇
  1986年   5篇
  1985年   7篇
  1984年   14篇
  1983年   8篇
  1982年   6篇
  1980年   5篇
  1979年   3篇
  1978年   5篇
  1977年   2篇
  1967年   3篇
  1962年   1篇
  1955年   1篇
排序方式: 共有4900条查询结果,搜索用时 203 毫秒
1.
Post-war growth of higher education has attracted the interest of national governments. They are properly concerned with higher education's contribution to economic success and equity, and the efficient and effective use of public funds. They can intervene by means of legislation (which is unwieldy), exhortation (which is ineffective), or funding incentives. Funding councils must operate within a social and political context which determines the balance between planning and the market, central and local direction, public and private funding. They have only four strategies to choose from: deficiency-, formula-, contract-, and core-funding. The first was nearly fatal; the last is the preferred option for the future.
There are two issues: the merging of the two funding councils (PCFC and UFC), and the ending of the binary system. The first could produce a welcome single guiding intelligence for UK higher education, and economies of scale. The second raises the question of the funding of fundamental research. The merging of PCFC and UFC and the reorganisation of research-funding is a two-headed nettle. It must be grasped soon.  相似文献   
2.
Crowdfunding – or creatively presenting a case for funding to like-minded individuals – is becoming an effective development strategy for academic libraries. The crowdfunding projects described offer multiple approaches to consider, from an adventure-themed video to embracing polka music to entice donors to give. Social media, used in conjunction with the web and well-established email communication formed the basis of successful project promotion. Developing a robust communication plan ahead of campaign launch is critical for success. Thanking donors for their transformational gifts and follow up communication describing the impact of their participation six months later raises friends for the library potentially for many years to come. With proper planning, an active and enthusiastic committee and effective donor stewardship, crowdfunding campaigns will help libraries raise funds to support strategic initiatives.  相似文献   
3.
This paper characterizes the methodological foundations of national standardization in the Russian Federation, in particular in the library and information field. The activities of Technical Standardization Committee 191 Scientific and Technical Information, Librarianship, and Publishing are reported.  相似文献   
4.
The basic properties of the blockchain technology are discussed to allow informed decisions on its selection and use in scientific and information activities. Specific examples are given and the efficiency of this technology is analyzed.  相似文献   
5.
This paper explores the information nature of culture. It is represented as an extragenetic and nonorganizational information process and system. Information is regarded as a universal property of matter that is essentially associated with development processes and realizes various forms and ways of storage and circulation at various development stages of global evolution. The socio-cultural principle of exogenous accumulation, transmission, and transformation of information is analyzed in the context of the continuing growth of the information content of material systems on the superhighway of global-universal evolution. It is noted that the information concept of culture evolves into a new area of cultural studies, that is information and cultural studies, advancing our understanding of the nature of culture and cultural genesis.  相似文献   
6.
This study examined whether persuasive health messages embedded in shooter games have broad or targeted effects on players’ willingness to engage in risk behaviors (N = 145). Participants presented with in-game health messages discouraging alcohol-impaired driving of motor vehicles showed reduced willingness to drink alcohol and to operate both motor and nonmotor vehicles, compared to those in a no-message gaming control condition. There were no spillover effects on willingness to smoke cigarettes or marijuana, thus implying targeted persuasive effects. In addition, players experiencing high instead of low cognitive load showed decreased postexperiment willingness to drink and operate nonmotor vehicles, thus suggesting that playing a game under high cognitive load can influence players’ attitudes. The findings replicate previous research and further expand on knowledge-activation and thought-disruption mechanisms underlying the persuasiveness of health messages.  相似文献   
7.
Automatic detection of source code plagiarism is an important research field for both the commercial software industry and within the research community. Existing methods of plagiarism detection primarily involve exhaustive pairwise document comparison, which does not scale well for large software collections. To achieve scalability, we approach the problem from an information retrieval (IR) perspective. We retrieve a ranked list of candidate documents in response to a pseudo-query representation constructed from each source code document in the collection. The challenge in source code document retrieval is that the standard bag-of-words (BoW) representation model for such documents is likely to result in many false positives being retrieved, because of the use of identical programming language specific constructs and keywords. To address this problem, we make use of an abstract syntax tree (AST) representation of the source code documents. While the IR approach is efficient, it is essentially unsupervised in nature. To further improve its effectiveness, we apply a supervised classifier (pre-trained with features extracted from sample plagiarized source code pairs) on the top ranked retrieved documents. We report experiments on the SOCO-2014 dataset comprising 12K Java source files with almost 1M lines of code. Our experiments confirm that the AST based approach produces significantly better retrieval effectiveness than a standard BoW representation, i.e., the AST based approach is able to identify a higher number of plagiarized source code documents at top ranks in response to a query source code document. The supervised classifier, trained on features extracted from sample plagiarized source code pairs, is shown to effectively filter and thus further improve the ranked list of retrieved candidate plagiarized documents.  相似文献   
8.
9.
10.
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