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   1283篇
  免费   27篇
教育   927篇
科学研究   54篇
各国文化   28篇
体育   155篇
文化理论   8篇
信息传播   138篇
  2023年   8篇
  2022年   10篇
  2021年   19篇
  2020年   46篇
  2019年   58篇
  2018年   79篇
  2017年   69篇
  2016年   73篇
  2015年   44篇
  2014年   47篇
  2013年   302篇
  2012年   37篇
  2011年   41篇
  2010年   30篇
  2009年   30篇
  2008年   35篇
  2007年   27篇
  2006年   26篇
  2005年   25篇
  2004年   34篇
  2003年   23篇
  2002年   19篇
  2001年   9篇
  2000年   16篇
  1999年   13篇
  1998年   2篇
  1997年   16篇
  1996年   10篇
  1995年   9篇
  1994年   11篇
  1993年   9篇
  1992年   11篇
  1991年   12篇
  1990年   8篇
  1989年   9篇
  1988年   10篇
  1987年   8篇
  1986年   7篇
  1985年   14篇
  1984年   5篇
  1983年   9篇
  1982年   6篇
  1981年   5篇
  1980年   4篇
  1979年   5篇
  1978年   5篇
  1977年   2篇
  1976年   5篇
  1973年   2篇
  1971年   3篇
排序方式: 共有1310条查询结果,搜索用时 17 毫秒
181.
Along with other cultural organizations, newspapers, through waves of digital disruption, have become subject to a dominant narrative of crisis. But newspapers have long participated in change. A constructivist approach, qualified by consideration of media materiality, draws attention to diverse but essential processes of innovation around them. We see a contraflow of migration from digital to print, opening up a shared media space; bonding strategies are bringing multimedia to ink on paper, while bridging via boundary objects such as QR (Quick Response) codes are connecting the two. Among other initiatives, development of automation of news production and experiments with transparency are further evidence of an active embrace of change by newspapers that calls into question the discourse on their demise. This analysis inductively develops a nuanced account of the role of the newspaper as an object and as an institution. It suggests a hybrid, multifaceted, enduring presence of print in the complex media ecology of the future.  相似文献   
182.
Bridge pressure flow scour at clear water threshold condition is studied theoretically and experimentally. The flume experiments reveal that the measured scour profiles under a bridge are more or less 2-dimensional; all the measured scour profiles can be described by two similarity equations, where the horizontal distance is scaled by the deck width while the local scour by the maximum scour depth; the maximum scour position is located just under the bridge about 15% deck width from the downstream deck edge; the scour begins at about one deck width upstream the bridge while the deposition occurs at about 2.5 deck widths downstream the bridge; and the maximum scour depth decreases with increas-ing sediment size, but increases with deck inundation. The theoretical analysis shows that: bridge scour can be divided into three cases, i.e. downstream unsubmerged, partially submerged, and totally submerged. For downstream unsubmerged flows, the maximum bridge scour depth is an open-channel problem where the conventional methods in terms of critical velocity or bed shear stress can be applied; for partially and totally submerged flows, the equilibrium maximum scour depth can be described by a scour and an inundation similarity number, which has been confirmed by experiments with two decks and two sediment sizes. For application, a design and field evaluation procedure with examples is presented, including the maximum scour depth and scour profile.  相似文献   
183.
Homeless parents of young children face many stressors that erode their self-esteem. This article articulates these stressors and how they negatively impact homeless parents and their children. Strategies for helping parents empower themselves and their children are explained.  相似文献   
184.
Executive functioning (EF) refers to higher order thought processes considered foundational for problem-solving. EF has both ‘cool’ cognitive and ‘hot’ emotional components. This study asks: (a) what are the relative contributions of ‘hot’ and ‘cool’ EF to children's academic achievement? (b) What are the relative contributions of ‘hot’ and ‘cool’ EF to learning-related classroom behaviors and observed engagement? (c) Do learning-related classroom behaviors and observed engagement account for the relation between EF and achievement? For a sample of 173 kindergarteners, cool EF predicted math achievement, learning-related classroom behaviors, and observed engagement. Hot EF did not predict any achievement or behavior outcomes when examined concurrently with cool EF. Children's classroom behavior did not account for the relation between cool EF and math achievement, suggesting cool EF and math performance are directly associated.  相似文献   
185.
This study investigated variation in students’ behavioral engagement across mathematics classes in China and the United States. Student behavioral engagement was examined along with two aspects of the classroom (group size and teacher instructions given about classroom behavior). Video observational data were collected and coded over 1051 time intervals in 35-minute mathematics sessions in Chinese classrooms (n = 8) and comparable American classrooms (n = 7). Latent growth analyses revealed that overall, behavioral engagement declined over time, although the drop-off was dramatically sharper in American classrooms relative to Chinese classrooms. In addition, larger group size and the timing of teacher instructions (given before versus after the behavior) were significantly associated with increased engagement. This study revealed compelling cultural differences as well as patterns in student and teacher behaviors associated with students engaging in on-task behaviors in the classroom. Implications for ways to promote effective classroom behavior are discussed.  相似文献   
186.
This paper discusses the fundamentals of Differential Scanning Calorimetry (DSC) including functions and outputs of a Differential Scanning Calorimeter along with common uses in academia and industry.  相似文献   
187.
Problem-based learning and the development of metacognition   总被引:1,自引:0,他引:1  
This study samples first year undergraduates from two programmes at a Hong Kong University (N = 66). One programme uses an entirely problem-based approach to learning and teaching, whilst the other uses more traditional methods. Using the Learning and Study Strategies Inventory (LASSI) as a measure of student perceptions of their thinking, or metacognition it explores differences in metacognitive development between each group of students between the beginning and end of their first year in each programme. The paper argues that, in addition to the formal learning context, everyday challenges emerging from the additional new social contexts provided by problem-based curricula provide fertile environments for the development of metacognition because whilst the highest ‘meta-level’ of cognition is usually not implicated when we receive an outside task and when the task solution is known, the meta-level does tend to be consulted when things go wrong or when the situation is new. In other words, when we are faced with finding solutions to a problem whether posed by the teacher as part of a problem-based curriculum or a new social environment, we are more likely to develop generic, as well as subject specific skills.  相似文献   
188.
189.
A recent evaluation of the new North Carolina Virtual Public School (NCVPS) in the USA revealed numerous expectations for virtual school teachers from secondary students. Specifically, students expected their teachers to actually teach rather than moderate a course shell, supplement course shells with content and projects that illustrate relevance, provide for both content and peer interaction, and respond to questions and provide feedback quickly. The data suggest a possible content‐related interaction where a limited course shell can be bolstered by a proactive teacher, but potentially flounder among teachers who do not expect or know how to supplement an online course. Data further suggest a potential communication‐related interaction where increased opportunities for student–student and student–teacher interaction could potentially decrease the actual or perceived need for individualized attention that is particularly challenging for virtual teachers to provide. These results can be used to establish teacher expectations and design professional development experiences that prepare teachers to undertake divergent roles unique to online instruction.  相似文献   
190.
Effects of Exposure to Part-time Faculty on Community College Transfer   总被引:1,自引:0,他引:1  
Over the past several decades, one of the most significant changes in the delivery of postsecondary education involves the dramatic increase in the use of contingent or part-time faculty. Although the increased use of part-time faculty within higher education makes sense from an administrative point of view, its use does not come without criticism. With community colleges representing a more convenient, affordable, and flexible educational option for a number of students, particularly those from disadvantaged backgrounds, examining how exposure to part-time faculty relates to students’ academic goals represents an important area of inquiry. This study draws from social and human capital frameworks and uses hierarchical generalized linear modeling (HGLM) to examine how exposure to part-time faculty relates to community college students’ likelihood of transferring to a four-year college or university. Findings suggest that students tend to be significantly less likely to transfer as their exposure to part-time faculty increases.  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