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   26683篇
  免费   329篇
  国内免费   14篇
教育   18997篇
科学研究   2400篇
各国文化   250篇
体育   2348篇
综合类   7篇
文化理论   289篇
信息传播   2735篇
  2021年   233篇
  2020年   359篇
  2019年   539篇
  2018年   1303篇
  2017年   1269篇
  2016年   1084篇
  2015年   452篇
  2014年   542篇
  2013年   4243篇
  2012年   556篇
  2011年   823篇
  2010年   670篇
  2009年   566篇
  2008年   659篇
  2007年   718篇
  2006年   416篇
  2005年   428篇
  2004年   522篇
  2003年   386篇
  2002年   346篇
  2001年   460篇
  2000年   525篇
  1999年   434篇
  1998年   255篇
  1997年   261篇
  1996年   306篇
  1995年   244篇
  1994年   257篇
  1993年   220篇
  1992年   349篇
  1991年   367篇
  1990年   339篇
  1989年   365篇
  1988年   337篇
  1987年   325篇
  1986年   325篇
  1985年   370篇
  1984年   292篇
  1983年   303篇
  1982年   239篇
  1981年   246篇
  1980年   259篇
  1979年   349篇
  1978年   258篇
  1977年   238篇
  1976年   200篇
  1975年   181篇
  1974年   182篇
  1973年   176篇
  1971年   174篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
The growth of archival studies programs has prompted archival scholars to establish an international network for supporting collaborative research, curriculum development, and pedagogy. Doctoral education is key to the sustainability of such programs and the continuation of the network over time. We carried out longitudinal research to survey the population of doctoral students attending one or more Archival Education and Research Institutes (AERI), an annual meeting first held in 2009. Building on prior research on graduate archival education, we gathered demographic and qualitative data about doctoral students specializing in archival studies who are based in several countries including the USA. We sought to assess attendee motivations, guide conference planning, and help advance overall AERI objectives. Our study provides a baseline understanding of the disciplinary backgrounds, research directions, and specific professional development activities that doctoral students in archival studies pursued around the globe from 2013 to 2015. This paper argues that doctoral education should continue to be a particular subject of archival research and indicates how archival students’ range of academic interests is diversifying and strengthening the scholarly community.  相似文献   
152.
Against the backdrop of Spain’s Transparency Act, this article discusses the presence or otherwise of a series of document types, proposed as management-related transparency indicators, on 61 (8 national and 53 provincial) historic archive websites. Although examples of good practice were identified, the information provided was found to be scant, in particular as regards lines of action, organisational objectives and yearly reports. The information most commonly provided on the websites included the collection classification chart, service use regulations and citizen charters. The inference drawn was that archives, so intently focused on their role in the application of the Act by the organisations they serve, neglect their own administrative obligations in respect of its provisions. The recommendation is that as government-funded and subsidised public service institutions, historic archives should exercise transparency by furnishing the information stipulated in the Act on their websites.  相似文献   
153.
154.
155.
This article considers the dynamics and specifics of training highly qualified scientific staff (philosophy doctors and doctors of sciences) in the field of information security and data protection in a 10-year period of 2004–2013 in basic research specialties as classified by the Higher Attestation Commission (VAC) of the Ministry of Education and Science of the Russian Federation.  相似文献   
156.
157.
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks.  相似文献   
158.
Editorial     
B. Sury 《Resonance》2017,22(5):431-432
  相似文献   
159.
160.
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