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   5006篇
  免费   171篇
  国内免费   110篇
教育   3702篇
科学研究   696篇
各国文化   4篇
体育   168篇
综合类   308篇
文化理论   2篇
信息传播   407篇
  2024年   1篇
  2023年   40篇
  2022年   85篇
  2021年   112篇
  2020年   156篇
  2019年   171篇
  2018年   94篇
  2017年   111篇
  2016年   97篇
  2015年   152篇
  2014年   391篇
  2013年   559篇
  2012年   428篇
  2011年   382篇
  2010年   268篇
  2009年   276篇
  2008年   321篇
  2007年   322篇
  2006年   289篇
  2005年   272篇
  2004年   207篇
  2003年   172篇
  2002年   121篇
  2001年   110篇
  2000年   63篇
  1999年   25篇
  1998年   18篇
  1997年   13篇
  1996年   8篇
  1995年   8篇
  1994年   7篇
  1993年   2篇
  1992年   4篇
  1991年   1篇
  1988年   1篇
排序方式: 共有5287条查询结果,搜索用时 31 毫秒
81.
经济法的利益观是社会利益观,社会利益是经济法产生和存在的天然基石;经济法以社会利益为本位是为了更好地保护和实现个人利益,以充分体现经济法的人文关怀;经济法为社会利益的实现提供了制度保障,即市场规制法律制度、宏观经济调控法律制度、社会分配法律制度和经济公益诉讼制度。  相似文献   
82.
This paper takes as a case study an undergraduate field class from a UK university to rural Uganda. It describes and evaluates the use of video diaries as a tool for investigating the process of transformative learning in the context of education for sustainability. The applicability of threshold concept theory to this learning is investigated. Results show the video diary technique to be much more successful in capturing the development of student learning than written diaries. Despite some practical difficulties, rich data were generated. Analysis demonstrated that learning met three of the five criteria for threshold concepts: the learning was transformative, integrative and troublesome. Further research could test whether the learning in this case study met the threshold concept criterion of irreversibility. Further elaboration of the theoretical relationship between threshold concepts, transformative learning and education for sustainability is also needed. It is concluded that the video diary method is potentially transferable to other educational research contexts and may be particularly suitable for researching learning in threshold spaces.  相似文献   
83.
84.
Depth maps are used for synthesis virtual view in free-viewpoint television (FTV) systems.When depth maps are derived using existing depth estimation methods,the depth distortions will cause undesirable artifacts in the synthesized views.To solve this problem,a 3D video quality model base depth maps (D-3DV) for virtual view synthesis and depth map coding in the FTV applications is proposed.First,the relationships between distortions in coded depth map and rendered view are derived.Then,a precisely 3DV quali...  相似文献   
85.
Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.  相似文献   
86.
罪刑法定原则是现代刑法的根基。它是对罪刑擅断主义的彻底否定。这一原则自资产阶级启蒙思想家提出至今,已成为不同社会制度的世界各国刑法中最普遍、最重要的一项原则,甚至成为国际人权公约的内容,成为一种国际化趋势。我国的罪刑法定原则是在摈弃了类推制度之后于1997年新刑法中正式以立法形式予以确认的。其价值内涵和内在要求,在新刑法中得到了较为全面、系统的体现,是我国社会主义民主法制建设的重大进步。  相似文献   
87.
This paper aims to gain insight into language production and academic language of 4- and 5-year-old students and their teachers in the course of a teacher intervention during kindergarten science education. The study is based on videotaped classroom observations, and specifically focuses on the academic language use of students (Nintervention = 18, Ncontrols = 26) and teachers (Nintervention = 5, Ncontrols = 5). The results suggest that this general teacher intervention yields interesting changes in language use and production. Patterns of change over time confirm the idiosyncratic and non-linear nature of these changes. Science lessons represent an appropriate context in which to acquaint students with academic language, which can be used as a basis to build upon more sophisticated language skills.  相似文献   
88.
儿童的逻辑不同于成人世界中的概念性逻辑。儿童的逻辑汇入了并充盈着鲜明而强烈的感性色彩和浪漫主义审美意蕴的诗性精神。诗性的逻辑是展现儿童精神之特质的基本表达形式,也为人类理性精神插上了想像的翅膀。  相似文献   
89.
This study evaluated the classification accuracy of a second grade oral reading fluency curriculum‐based measure (R‐CBM) in predicting third grade state test performance. It also compared the long‐term classification accuracy of local and publisher‐recommended R‐CBM cut scores. Participants were 266 students who were divided into a calibration sample (n = 170) and two cross‐validation samples (n = 46; n = 50), respectively. Using calibration sample data, local fall, winter, and spring R‐CBM cut scores for predicting students’ state test performance were developed using three methods: discriminant analysis (DA), logistic regression (LR), and receiver operating characteristic curve analysis (ROC). The classification accuracy of local and publisher‐recommended cut scores was evaluated across subsamples. Only DA and ROC produced cut scores that maintained adequate sensitivity (≥.70) across cohorts; however, LR and publisher‐recommended scores had higher levels of specificity and overall correct classification. Implications for developing local cut scores are discussed.  相似文献   
90.
本文介绍了网络入侵检测系统的基本功能。在对目前研究的入侵检测系统的分类、性能分析、技术分析的基础上,提出了一个针对网络入侵的综合解决方案,同时探讨了入侵检测系统的发展方向。  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