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   9920篇
  免费   121篇
  国内免费   10篇
教育   6903篇
科学研究   1205篇
各国文化   67篇
体育   696篇
综合类   6篇
文化理论   69篇
信息传播   1105篇
  2022年   58篇
  2021年   122篇
  2020年   162篇
  2019年   216篇
  2018年   359篇
  2017年   344篇
  2016年   330篇
  2015年   201篇
  2014年   325篇
  2013年   1687篇
  2012年   261篇
  2011年   284篇
  2010年   234篇
  2009年   219篇
  2008年   266篇
  2007年   221篇
  2006年   204篇
  2005年   192篇
  2004年   212篇
  2003年   159篇
  2002年   160篇
  2001年   215篇
  2000年   227篇
  1999年   200篇
  1998年   116篇
  1997年   138篇
  1996年   119篇
  1995年   88篇
  1994年   107篇
  1993年   76篇
  1992年   172篇
  1991年   139篇
  1990年   131篇
  1989年   153篇
  1988年   137篇
  1987年   108篇
  1986年   112篇
  1985年   120篇
  1984年   87篇
  1983年   99篇
  1982年   69篇
  1981年   78篇
  1980年   65篇
  1979年   107篇
  1978年   71篇
  1977年   67篇
  1976年   59篇
  1975年   52篇
  1974年   63篇
  1973年   57篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
51.
Libraries have been the key to preserving culture and historic legacy for centuries. One such treasure cataloged in The Pennsylvania State University (Penn State) Libraries is a collection of over 33,000 Sanborn? Fire Insurance Maps. Originally kept safe in metal drawers, the library has embarked on a journey to digitize this abundance of information, combine it with other media such as photographs, and make it accessible through a web interface. Inspired by these efforts, we accessed this information and took it to the next level. Using state of the art 3D modeling and immersive technologies, we created a historic 3D model and immersive experiences of Penn State, exemplarily for the 1922 campus. The resulting experiences can be accessed through the web but also through head mounted displays (HMDs) and mobile phones in combination with VR viewers such as the Google Cardboard. Additionally, they can be used anywhere in the world or on the campus itself as a way to enable remote and in situ experiences and learning. Immersive experiences let us connect to the past, the present and the future, and as such offer value to digital cultural heritage efforts.  相似文献   
52.
53.
ABSTRACT

This article explores the experiences of a group of established academic staff in New Zealand and the UK, as they undertake a doctorate in their home institutions. Our interest is in how individuals negotiate this dual status from a cultural-historical activity theory (CHAT) stance that explores how rules, tools, community and divisions of labour, and interacting activity systems, shape doctoral experiences. The focus in this article, having analysed their detailed narrative accounts, is on how academics experience three interdependent activity systems: those surrounding the thesis, the institutional context, and the home-life spheres. Issues related to time, workload and supervision issues, variability in collegial support and impact on personal priorities and time emerged. There is a range of particularities – from easy access to resources/supervisors to inflexible institutional regulations – applicable to this group of doctoral candidates. Negotiating life as an academic with concurrent doctoral candidature provides positive outcomes in terms of teaching, research confidence and general personal and professional development. However, a range of difficulties can also be encountered, particularly in relation to personal and professional relationships, and workload management.  相似文献   
54.
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   
55.
The authors examined the relationship between stress, adaptive coping, and life satisfaction among college students who reported having a friend or family member with eating disorder symptomatology. A hierarchical regression confirmed the study's hypotheses. Higher stress was linked with less life satisfaction. After stress was controlled, plan coping had a beneficial influence on life satisfaction. College counselors can use these findings when choosing interventions for clients who are close to someone with an eating disorder.  相似文献   
56.
This article analyses the student assessment procedures of 12 universities in the UK, the Netherlands and the Czech Republic with respect to their alignment with the European standards and guidelines on the quality of assessing higher education students (European Standards and Guidelines for Quality Assurance [ESG] 1.3). Based on qualitative methodology combining document review with semi-structured interviews, the analysis has yielded three major results. First, the assessment procedures of the UK universities studied indicate the highest alignment with the ESG 1.3 when compared to the Czech institutions, with the Dutch universities occupying the middle ground. Second, a preference for summative assessment to account for pressures of massification can be observed at institutions in all three countries. Third, it is argued that contrary to some (ministerial) expectations, the influence of the ESG on institutions seems to be insignificant, due to unawareness of the ESG 1.3 at all of the UK and Dutch universities analysed and only moderate knowledge of ESG 1.3 in the Czech case. For this reason, there seems to be a need for communicating the ESG to higher education institutions rather than revising the scope of the ESG as envisaged in the 2012 Bologna policy document (Bucharest Communiqué).  相似文献   
57.
58.
59.
60.
Neuroanatomy education is a challenging field which could benefit from modern innovations, such as augmented reality (AR) applications. This study investigates the differences on test scores, cognitive load, and motivation after neuroanatomy learning using AR applications or using cross-sections of the brain. Prior to two practical assignments, a pretest (extended matching questions, double-choice questions and a test on cross-sectional anatomy) and a mental rotation test (MRT) were completed. Sex and MRT scores were used to stratify students over the two groups. The two practical assignments were designed to study (1) general brain anatomy and (2) subcortical structures. Subsequently, participants completed a posttest similar to the pretest and a motivational questionnaire. Finally, a focus group interview was conducted to appraise participants’ perceptions. Medical and biomedical students (n = 31); 19 males (61.3%) and 12 females (38.7%), mean age 19.2 ± 1.7 years participated in this experiment. Students who worked with cross-sections (n = 16) showed significantly more improvement on test scores than students who worked with GreyMapp-AR (P = 0.035) (n = 15). Further analysis showed that this difference was primarily caused by significant improvement on the cross-sectional questions. Students in the cross-section group, moreover, experienced a significantly higher germane (P = 0.009) and extraneous cognitive load (P = 0.016) than students in the GreyMapp-AR group. No significant differences were found in motivational scores. To conclude, this study suggests that AR applications can play a role in future anatomy education as an add-on educational tool, especially in learning three-dimensional relations of anatomical structures.  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