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   1502篇
  免费   29篇
  国内免费   1篇
教育   1030篇
科学研究   72篇
各国文化   13篇
体育   233篇
综合类   1篇
文化理论   15篇
信息传播   168篇
  2023年   9篇
  2022年   10篇
  2021年   15篇
  2020年   35篇
  2019年   63篇
  2018年   58篇
  2017年   57篇
  2016年   69篇
  2015年   48篇
  2014年   46篇
  2013年   368篇
  2012年   34篇
  2011年   47篇
  2010年   37篇
  2009年   30篇
  2008年   39篇
  2007年   54篇
  2006年   33篇
  2005年   20篇
  2004年   20篇
  2003年   20篇
  2002年   26篇
  2001年   17篇
  2000年   27篇
  1999年   21篇
  1998年   11篇
  1997年   7篇
  1996年   11篇
  1995年   7篇
  1994年   12篇
  1993年   16篇
  1992年   13篇
  1991年   14篇
  1990年   10篇
  1989年   11篇
  1988年   10篇
  1987年   8篇
  1986年   15篇
  1985年   12篇
  1984年   12篇
  1983年   16篇
  1982年   16篇
  1981年   15篇
  1980年   6篇
  1979年   8篇
  1978年   7篇
  1977年   8篇
  1975年   11篇
  1973年   8篇
  1972年   5篇
排序方式: 共有1532条查询结果,搜索用时 15 毫秒
91.
This paper presents the bibliometric characteristics of 32 biomedical open access journals published by Academic Journals and International Research Journals – the two Nigerian publishers in Jeffery Beall's list of 23 predatory open access publishers in 2012. Data about the journals and the authors of their articles were collected from the websites of the publishers, Google Scholar and Web of Science. As at December 2012, the journals had together produced a total of 5,601 papers written by 5,599 authors, and received 12,596 citations. Authors from Asia accounted for 56.79% of the publications; those from Africa wrote 28.35% while Europe contributed 7.78%. Authors from Africa accounted for 18.25% of the citations these journals received, and this is about one‐third the number of citations by authors in Asia (54.62%). At country level, India ranks first in the top 10 citer countries, while Nigeria, the host country of the journals, ranked eighth. More in‐depth studies are required to develop further information about the journals such as how much scientific information the journals contain, as well as the science literacy of the authors and the editorial.  相似文献   
92.
For individuals with strong work identities, the decision to retire can be particularly challenging. For academic physicians, retirement is an important personal decision that also has far-reaching implications for the healthcare system. This is because academic physicians are responsible for producing the research from which key medical decisions are made, for training future healthcare providers, and for providing specialized care for patients. For this study, we conducted focus groups with academic physicians from a large research university in Canada and then performed inductive thematic analyses to examine perceptions and concerns about later life career transitions. This study highlights tensions between professional experiences for the next generation of physicians and individual struggles with personal identity. Findings suggest improvements to institutional programs that support flexible, agentive, and respectful retirement transitions will not only be beneficial but necessary as medical and university systems continue to grapple with issues of balanced recruitment and succession.  相似文献   
93.
The authors provide a robust framework for using rhetorical foundations to teach multimodality in technical communication, describing a pedagogical approach wherein students consider the rhetorical canons—invention, arrangement, style, delivery, and memory—when developing texts beyond print. Students learn to assess their own work, reflecting on how each canon contributed to the rhetorical effectiveness of their multimodal projects. The authors argue for using the canons as a rhetorical foundation for helping students understand technical communication in the digital age.  相似文献   
94.
95.
We conducted a content analysis of generic qualitative counseling dissertations (GQR; N = 70), examining their methodological justifications, coherence, and trustworthiness. Dissertations authors often presented vague methodological justifications. Findings have implications for constructing methodological justifications, integrating relevant literature, and awareness of how GQR compares to other qualitative methodologies.  相似文献   
96.
Studies show that spatial interventions lead to improvements in mathematics. However, outcomes vary based on whether physical manipulatives (embodied action) are used during training. This study compares the effects of embodied and non-embodied spatial interventions on spatial and mathematics outcomes. The study has a randomized, controlled, pre-post, follow-up, training design (N = 182; mean age 8 years; 49% female; 83.5% White). We show that both embodied and non-embodied spatial training approaches improve spatial skills compared to control. However, we conclude that embodied spatial training using physical manipulatives leads to larger, more consistent gains in mathematics and greater depth of spatial processing than non-embodied training. These findings highlight the potential of spatial activities, particularly those that use physical materials, for improving children's mathematics skills.  相似文献   
97.
98.
This paper advances the ongoing discussion of methods for predicting movie box office revenues with two contributions to the methodology and an out-of-sample test of the model. The first innovation is the development of a two-stage model using publicly available pre-release indicators to predict (1) initial week and (2) subsequent run box office revenues. To incorporate the experience-good nature of movies, the second stage is estimated by incorporating a proxy variable for box office success during the first week relative to predicted first week success. The second contribution is an empirical test of De Vany and Walls’ (J Econ Dyn Control 28:1035–1057, 2004) finding that the distribution of movie revenues has “heavy tails” and follows a non-Gaussian stable distribution with infinite variance. We estimate the two-stage model of a movie’s box office success on all general release movies in 1 year with both the Gaussian and stable distribution with heavy tails and infinite variance and find no evidence for the stable distribution in either stage of the estimation. This two-stage model is validated by comparing all general release movies in 3 future years (out-of-sample data) to the model’s predictions.  相似文献   
99.
100.
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