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   1335篇
  免费   24篇
  国内免费   1篇
教育   989篇
科学研究   98篇
各国文化   19篇
体育   99篇
综合类   1篇
文化理论   11篇
信息传播   143篇
  2022年   10篇
  2021年   17篇
  2020年   27篇
  2019年   33篇
  2018年   56篇
  2017年   47篇
  2016年   52篇
  2015年   22篇
  2014年   33篇
  2013年   298篇
  2012年   32篇
  2011年   38篇
  2010年   24篇
  2009年   22篇
  2008年   37篇
  2007年   31篇
  2006年   30篇
  2005年   17篇
  2004年   28篇
  2003年   22篇
  2002年   25篇
  2001年   13篇
  2000年   26篇
  1999年   22篇
  1998年   14篇
  1997年   18篇
  1996年   16篇
  1995年   21篇
  1994年   22篇
  1993年   15篇
  1992年   16篇
  1991年   17篇
  1990年   16篇
  1989年   13篇
  1988年   11篇
  1987年   8篇
  1986年   13篇
  1985年   13篇
  1984年   15篇
  1983年   15篇
  1982年   11篇
  1981年   13篇
  1980年   6篇
  1978年   8篇
  1976年   8篇
  1975年   5篇
  1970年   7篇
  1927年   6篇
  1923年   6篇
  1921年   4篇
排序方式: 共有1360条查询结果,搜索用时 250 毫秒
71.
72.
73.
74.
75.
76.
77.
Abstract

This issue is the second of a special PRIMUS two-part issue collecting articles on undergraduate research from experienced faculty mentors. We offer it as a valuable resource for faculty leading undergraduate research programs. This issue presents a collection of papers offering advice on a variety of specific topics important for leaders of undergraduate research programs. Issues of finding and designing appropriate and accessible research projects, assessing undergraduate research, and publicizing it in the media are addressed.  相似文献   
78.
New important battle-outcome-prediction conditions are developed for combat between two homogeneous military forces modelled by variable-coefficient Lanchester-type equations for area fire. Such conditions are very significant in modern operations research for developing important insights into the dynamics of combat. However, similar differential-equation models do arise in other fields of science and technology such as mathematical ecology and epidemiology, and consequently our new mathematical results may also find application there. These new important “simple approximate” battle-outcome-prediction conditions depend on not only the combat-attrition model but also the battle-termination model, and they are developed for two different types of battle-termination conditions (fixed-force-level-breakpoint battles and fixed-force-ratio-breakpoint battles). They are sufficient (but not necessary) to determine the outcome of battle without having to explicitly compute the force-level trajectories, and a generalization of Lanchester’s famous linear law to variable-coefficient combat is involved in their development. Certain integrability properties of the Lanchester attrition-rate coefficients figure prominently in these results, and an important physical interpretation (relating to logistics considerations) is given for these properties.  相似文献   
79.
This paper presents findings from a three-year, qualitative study of teachers enrolled in a Masters of Teacher Leadership program. Researchers sought to understand the ways teachers’ beliefs about and understandings of teacher leadership were affected by their participation in a formal teacher leadership program, as well as the kinds of actions they took up as a result of this participation. Data indicate three significant ways participants’ work as teacher leaders was developed and enhanced, including: (a) identifying and amplifying their professional voice, (b) deepening and extending their voice as they plan, and (c) reframing their work/shift responsibility through constructing widening circles of influence and impact. Authors identify implications of their research for growing teacher leaders, school improvement and change, changing school culture, enhancing student engagement, and building new structures.  相似文献   
80.
Although progress has been made, greater efforts are needed to promote faculty diversity at the college and university levels, especially in STEM fields. Thus, it is important to elucidate best practices both for increasing awareness of diversity issues pertaining to higher education and for implementing change. This article focuses on the outcomes of a diversity workshop for college and university faculty hosted by the West Virginia Higher Education Policy Commission, Division of Science and Research. More specifically, it elucidates how participation in the workshop translated into practice at the faculty participants’ home institutions.  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