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   732篇
  免费   13篇
  国内免费   8篇
教育   436篇
科学研究   88篇
各国文化   28篇
体育   117篇
综合类   13篇
文化理论   3篇
信息传播   68篇
  2023年   4篇
  2022年   5篇
  2021年   18篇
  2020年   23篇
  2019年   37篇
  2018年   43篇
  2017年   35篇
  2016年   31篇
  2015年   29篇
  2014年   20篇
  2013年   122篇
  2012年   31篇
  2011年   33篇
  2010年   31篇
  2009年   27篇
  2008年   24篇
  2007年   30篇
  2006年   19篇
  2005年   22篇
  2004年   13篇
  2003年   27篇
  2002年   29篇
  2001年   19篇
  2000年   15篇
  1999年   3篇
  1998年   4篇
  1997年   3篇
  1996年   5篇
  1995年   2篇
  1994年   3篇
  1992年   2篇
  1991年   3篇
  1989年   3篇
  1988年   2篇
  1985年   3篇
  1984年   4篇
  1983年   4篇
  1981年   1篇
  1980年   2篇
  1979年   3篇
  1978年   1篇
  1977年   4篇
  1976年   2篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
  1963年   2篇
  1957年   1篇
  1955年   1篇
  1875年   1篇
排序方式: 共有753条查询结果,搜索用时 873 毫秒
81.
This research examines the impact of lecturer-student exchange (student-LMX) on engagement, course satisfaction, achievement, and intention to leave university prematurely for 363 students in one Australian university. Survey and grade point average (GPA) data were collected from domestic undergraduate first- and second-year students and analysed using structural equation modelling. The results indicated that student’s levels of engagement and course satisfaction fully mediated the relationship between student-LMX and intention to leave university, when demographic and socio-economic factors were controlled for. In an era when low student engagement and attrition is often attributed to individual demographic factors, and lecturers are under increasing threat of being replaced by technology, this research offers compelling evidence regarding the role of lecturer-student relationships in enhancing tertiary student outcomes.  相似文献   
82.
核能的计算是原子物理的重要内容和高考的热点问题,有关其计算的几种方法,现归纳如下:(1)根据质量亏损计算,步骤如下:  相似文献   
83.
Studying on the increasing temperature in IT-SOFC: Effect of heat sources   总被引:1,自引:1,他引:1  
The dimensions and the materials type limit the performance of fuel cell. The increase of the temperature in electrodes and electrolyte of the cell,is due to the over potential of activation (transfer of load),the over potential Ohmic (resistance of polarization),the over potential of reaction (heat released by the chemical reaction) and the over potential of diffusion. In this paper,we studied the thermo-electrical performance of an intermediate temperature solid oxide fuel cell (IT-SOFC) with electrode supported. The aim of this work is to study this increasing temperature of a single cell of an IT-SOFC under the influence of the following parameters: heat sources,functioning temperature and voltages of the cell,geometric configuration and materials type. The equation of energy in one dimension is numerically resolved by using the method of finite volumes. A computing program (FORTRAN) is developed locally for this purpose in order to obtain fields of temperature in every element of the cell.  相似文献   
84.
INTRODUCTIONThemotionoftheflowinarotatingcurvedpipeisafundamentalproblem ,whosesolutionhaspotentialapplicationsingasturbines ,elec tricgenerators ,electricmotorsandsomeequip mentsusedinseparationprocesses.Itisimpor tanttoknowtheflowstructurecharacteristic…  相似文献   
85.
“发展”是目前语文教学中普遍使用的术语,要正确理解它,既要学习传统教学发展理论,又要学习现代教学发展理论。小学语文教学的发展目标就是发展学生的语言能力、思想、情感及审美能力、思维能力,使他们掌握学习方法,养成良好的学习习惯。  相似文献   
86.
Pigeons were trained on a discrete-trial delayed reinforcement procedure with respect to one response key that was periodically illuminated. In some conditions, a second response key, or a tone, both previously paired with reinforcement, was interpolated in the delay-of-reinforcement interval. In comparison to a control condition with neither stimulus in the delay interval, the interpolated stimulus attenuated (blocked) the amount of responding that was maintained by the delayed reinforcement contingency. The degree of blocking was unaffected by whether the interpolated stimulus was the tone or keylight, in spite of the fact that the keylight evoked responding and the tone did not. A second study showed that the blocking effects involved the response-reinforcer association in that blocking occurred when the delayed reinforcement was response-dependent but did not occur when reinforcement was response-independent. The results thus show that response-reinforcer associations are affected by informational variables in the same manner as has been shown for stimulus-reinforcer associations. They also demonstrate that preexisting stimulus-reinforcer associations can block response-reinforcer associations, thus suggesting that both types of association depend upon the same associative process.  相似文献   
87.
Science & Education - A thorough understanding of the concept of the nature of science (NOS) is essential to the development of scientific literacy among students, as it provides the students...  相似文献   
88.
氯化亚汞声光器件换能器五层结构设计   总被引:2,自引:1,他引:2  
提出用环氧树脂聚合物作为缓冲层 ,设计氯化亚汞声光器件的换能器。从器件的布喇格带宽出发 ,设计了五层结构的换能器 ,计算了以Ag为电极 ,ln或pb粘接层时 ,其五层的各自厚度 ,并确保了换能器倍频程带宽  相似文献   
89.
Community colleges in Tennessee, either directly or indirectly, experienced unprecedented change as a result of Tennessee Promise. The present study explored how student support service administrators at three community colleges responded to organizational change as a result of the Tennessee Promise legislation. Investigators selected community colleges for the multi-site case study because the legislative impact would be actualized by the preparations made to serve incoming Promise recipients. The delivery of orientation services framed organizational change because the service staff facilitate connections and provide information to incoming students. Challenges like a shifting population, ill-equipped infrastructure, inadequate remediation support, heightened interest for social engagement opportunities, misinformation, and unmet fiscal needs left administrators seeking coherence through the change process. Investigators found community college administrators react to change similarly. Administrators acknowledged change as continuous, created a culture of innovation among stakeholders, and were not afraid to fail as responses to the organizational change phenomenon.  相似文献   
90.
The authors examined the peer feedback exchanged in 2 supervision groups of counselors‐in‐training (CITs). CITs generated 169 statements grouped into 10 clusters representing 5 regions of peer feedback: counselor focus and engagement, insight‐oriented skills, exploratory skills, therapeutic alliance, and intervention activities. Both positive and corrective peer feedback was exchanged on topics ranging from counselor performance skills to case conceptualization.  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