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   151122篇
  免费   2508篇
  国内免费   973篇
教育   101231篇
科学研究   19417篇
各国文化   2149篇
体育   11427篇
综合类   1500篇
文化理论   1216篇
信息传播   17663篇
  2022年   806篇
  2021年   1879篇
  2020年   2299篇
  2019年   2858篇
  2018年   3423篇
  2017年   3802篇
  2016年   3785篇
  2015年   3285篇
  2014年   4575篇
  2013年   29126篇
  2012年   4423篇
  2011年   5133篇
  2010年   4444篇
  2009年   4527篇
  2008年   4331篇
  2007年   4418篇
  2006年   4545篇
  2005年   4104篇
  2004年   3874篇
  2003年   3215篇
  2002年   3018篇
  2001年   2784篇
  2000年   2176篇
  1999年   2104篇
  1998年   1800篇
  1997年   1809篇
  1996年   1898篇
  1995年   1609篇
  1994年   1587篇
  1993年   1558篇
  1992年   1599篇
  1991年   1478篇
  1990年   1480篇
  1989年   1404篇
  1988年   1259篇
  1987年   1152篇
  1986年   1189篇
  1985年   1457篇
  1984年   1330篇
  1983年   1307篇
  1982年   1255篇
  1981年   1174篇
  1980年   1167篇
  1979年   1270篇
  1978年   1217篇
  1977年   1129篇
  1976年   1009篇
  1975年   814篇
  1974年   816篇
  1973年   783篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Working memory training improves children's cognitive performance on untrained tasks; however, little is known about the underlying neural mechanisms. This was investigated in 32 typically developing children aged 10–14 years (19 girls and 13 boys) using a randomized controlled design and multi-modal magnetic resonance imaging (Devon, UK; 2015–2016). Training improved working memory performance and increased intrinsic functional connectivity between the bilateral intraparietal sulci. Furthermore, improvements in working memory were associated with greater recruitment of the left middle frontal gyrus on a complex span task. Repeated engagement of fronto-parietal regions during training may increase their activity and functional connectivity over time, affording greater working memory performance. The plausibility of generalizable cognitive benefits from a neurobiological perspective and implications for neurodevelopmental theory are discussed.  相似文献   
2.
Early childhood is a sensitive period for learning and social skill development. The maturation of cerebral regions underlying social processing lays the foundation for later social-emotional competence. This study explored myelin changes in social brain regions and their association with changes in parent-rated social-emotional development in a cohort of 129 children (64 females, 0–36 months, 77 White). Results reveal a steep increase in myelination throughout the social brain in the first 3 years of life that is significantly associated with social-emotional development scores. These findings add knowledge to the emerging picture of social brain development by describing neural underpinnings of human social behavior. They can contribute to identifying age-/stage-appropriate early life factors in this developmental domain.  相似文献   
3.
As medical programs place increasing importance on competency-based training and surgical simulations for residents, anatomy laboratories, and body donation programs find themselves in a position of adapting to changing demands. To better assess the demand for “life-like” cadaveric specimens and evaluate the possible impacts that competency-based medical education could have upon the body donation program of McGill University, Canada, the authors tracked, over the course of the last 10 years, the number of soft-embalmed specimens, along with the number of teaching sessions and the residents enrolled in competency-based programs that are using cadaveric material. The results reveal that the number of soft-embalmed specimens used within residency training increased from 5 in 2009 to 35 in 2019, representing an increase from 6% of bodies to 36.5% of the total number of body donors embalmed in this institution. Correspondingly, the number of annual teaching sessions for residents increased from 19 in 2012 to 116 in 2019. These increases in teaching are correlated with increasing number of residents enrolled in competency-based programs over the last 3 years (Pearson r ranging from 0.9705 to 0.9903, and R2 ranging from 0.9418 to 0.9808). Those results suggest that the new skill-centered curricula which require residents to perform specific tasks within realistic settings, exhibit a growing demand for “life-like” cadaveric specimens. Institutions’ body donation programs must, therefore, adapt to those greater need for cadaveric specimens, which presents many challenges, ranging from the logistical to the ethical.  相似文献   
4.
Research in Higher Education - Given the significant need to increase and diversify graduate enrollments within computing fields, it is vital to understand what shapes students’ pathways to...  相似文献   
5.
文化功能也就是"出之于人,归之于人",江口土家族"金钱杆"起于秦末时期的西楚霸王,形于族人生产生活实践中。经过研究发现,"金钱杆"是具有彰显土家族文化的独特符号、"常"与"非常"之间转换的独特节点、教化孩童的重要载体以及增强体质的独特途径的少数民族传统体育活动。本研究主要探求"金钱杆"发展逻辑,旨在为"金钱杆"的传承和发展提供有益的指导。  相似文献   
6.
7.
Abstract

Supporting global health priorities through the development of robust health science librarianship partnerships is of significant importance. Increased demand for synthesizing evidence-based information, collating quality resources, and increasing research productivity to improve human health requires integration of library and information science skills and expertise. The Health Sciences Library (HSL) at the University of North Carolina at Chapel Hill (UNC), exists to be an indispensable partner in health information and knowledge, teaching and learning, and research. As global efforts at UNC expanded, the HSL sought to ensure that our global engagement strategy and integration were aligned with campus priorities and partner needs. The HSL created a global research partnership plan: identify resources that improve efficiency, increase access to information, build in-country capacity and expertise—all while strengthening collaborations across multiple countries. Creating a meaningful and sustainable engagement strategy was central to envisioning our path forward and can be used as a framework for consideration by librarians in similar settings.  相似文献   
8.
[目的/意义] 以"科学人讲坛"在"新媒体+科学文化内容"方面的有序推进为主要案例,论述新媒体技术在图书馆科学文化传播活动中的具体应用,找到专业图书馆科学文化传播工作优势及发展方向。[方法/过程] 梳理"科学人讲坛"讲座内容、推送渠道及观看数据,通过数据分析影响科学文化传播效果的主要因素。[结果/结论] 新媒体及时、灵活、强互动等特性在科学文化传播工作中起到了良好的效果。图书馆的服务意识、丰富馆藏及科学人文精神与新媒体技术优势的结合,使科学文化传播工作中公众的参与兴趣得到了极大提升,拉近了科学与公众间的距离,提高了科学文化传播效果。  相似文献   
9.
  • Scientific publication has been a key part of the scientific method since the inception of Philosophical Transactions in 1665.
  • The scientific publications industry has grown exponentially along with science, incorporating technological innovations along the way, and adapting journal processes and practices to changing needs of science as it matured.
  • Of all the technological innovations over more than 300 years, the move to online journals may be the most significant, making open access to content practical for the first time.
  • The open‐access movement is disrupting the economics of journal publishing, which is hoped will make the industry more competitive: the ability of the publications industry to adapt to open access will be a measure of its resilience.
  • The demand for articles published in reputable journals continues to grow as readers trust the credibility of peer reviewed journal articles, and good authors value the prestige of publishing in the best journals.
  • It is difficult to predict what new functionalities may be included in articles of the future or what additional services publishers and editors will provide, but there is every reason to believe that scientific journal articles are here to stay.
  相似文献   
10.
静电实验是高中物理教学中的难点,实验易受漏电影响,成功率低。本文介绍了如何利用生活中常见的低成本材料,创造性地设计出研究静电平衡下导体电荷分布规律的演示仪器,并将其成功地运用到光电效应实验中,实验操作简单、安全,实验现象直观、明显,在教学中取得了非常好的教学效果。  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