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   599篇
  免费   9篇
教育   500篇
科学研究   26篇
各国文化   7篇
体育   31篇
综合类   1篇
文化理论   16篇
信息传播   27篇
  2023年   2篇
  2022年   11篇
  2021年   13篇
  2020年   31篇
  2019年   37篇
  2018年   43篇
  2017年   48篇
  2016年   34篇
  2015年   31篇
  2014年   32篇
  2013年   143篇
  2012年   24篇
  2011年   12篇
  2010年   21篇
  2009年   16篇
  2008年   10篇
  2007年   7篇
  2006年   9篇
  2005年   7篇
  2004年   6篇
  2003年   8篇
  2002年   9篇
  2001年   4篇
  2000年   5篇
  1999年   1篇
  1998年   5篇
  1997年   1篇
  1996年   5篇
  1995年   2篇
  1994年   2篇
  1993年   3篇
  1992年   3篇
  1991年   4篇
  1990年   4篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1986年   2篇
  1985年   1篇
  1984年   1篇
  1982年   3篇
  1979年   1篇
  1978年   1篇
  1976年   1篇
  1964年   1篇
排序方式: 共有608条查询结果,搜索用时 15 毫秒
141.
Guidance has a role to play in helping older workers to lead meaningful and fruitful lives; inside, outside, on the edge of the labour market, or in voluntary work with examples from two very different European countries: Denmark and Spain. This paper aims to draw attention to older workers guidance from an economic policy approach. It will be demonstrated that there is a need for more policy making for older workers’ guidance in both countries.  相似文献   
142.
Tertiary Education and Management - The aim of this study is to compare the results of successful mergers in terms of ranking performance of the so called ‘world-class’ universities in...  相似文献   
143.
This article presents a study which aimed to explore the professional identity of early childhood teachers in Chile, applying a sociocultural approach. Relying on an exploratory qualitative design, data were collected through focus groups and photo-narratives. The findings show that these teachers understand that child-centred pedagogy is the pillar of their professional identity; that they perceive that this is under threat from the schoolification of early childhood education; and that they admit that their capacity to resist this tendency is limited to the classroom. These findings suggest that, having scarce resources available to negotiate their professional identity in their working context, early childhood teachers in Chile have a limited capacity for agency.  相似文献   
144.
A possible explanation for the numerous failures in the implementation and use of work-life balance (WLB) practices may relate to the fact that the majority of companies have introduced them without exploring the nature and extent of their founders’ or owners’ prior knowledge of WLB and WLB practices. This paper analyses the relationships between congenital learning and WLB culture and tries to identify whether WLB culture impacts on business performance through an empirical study of 229 small and medium-sized enterprises (SMEs) in the Spanish metal industry. Our findings show that in order to create positive attitudes toward WLB, managers need to create and support a learning process. These findings provide interesting insights into the drivers of organisational performance for SMEs that develop and support a WLB-supporting culture.  相似文献   
145.
This study tested a set of hypotheses derived from the model of academic achievement in mathematics of the Social Cognitive Career Theory in a sample of Argentinean middle school students. To this aim, 277 students (male and female; age: 13–15 years) were assessed using the following instruments: logical–mathematical self-efficacy scale, mathematics outcome expectations, mathematics performance goals, and mathematics ability test. All of these instruments had been adapted for use in Argentinean students. Academic achievement in mathematics (i.e., grades obtained on regular school exams) was the variable to be modeled through the path analysis technique. The analysis allowed identification of interrelations among the variables and identification of direct and indirect effects. Academic achievement in mathematics was partially explained by the model. Overall, the results support the theoretical postulates of Social Cognitive Career Theory.  相似文献   
146.
This work describes the genesis, articulation and consolidation from 2007 of a social network of b-learning (blended learning) in the UA (University of Alicante) (Spain), with the institutional backing of the Office of the Vice President for Education Technology and Innovation, and the momentum and advice of professor Angel Fidalgo (UNESCO (United Nations Educational, Scientific and Cultural Organization) chair for University of Management and Policy). The social network currently has more than 25 teachers, working on different work linkages with the university, implementing or intending to apply the teaching methodologyb-learning during the course 2007-2008 in a variety of courses and degrees. To do so, several resource centers (blogs, wikis, Wimba Create (before CourseGenie), etc.), and digital platforms (Virtual Campus of the UA, Moodle, etc.) are used.  相似文献   
147.
Background: Question‐answering systems (or QA Systems) stand as a new alternative for Information Retrieval Systems. Most users frequently need to retrieve specific information about a factual question to obtain a whole document. Objectives: The study evaluates the efficiency of QA systems as terminological sources for physicians, specialised translators and users in general. It assesses the performance of one open‐domain QA system, START, and one restricted‐domain QA system, MedQA. Method: The study collected two hundred definitional questions (What is…?), either general or specialised, from the health website WebMD. Sources used by the open‐domain QA system, START, and the restricted‐domain QA system, MedQA, were studied to retrieve answers, and later a range of evaluation measures (precision, Mean Reciprocal Rank, Total Reciprocal Rank, First Hit Success) were applied to mark the quality of answers. Results: It was established that both systems are useful in the retrieval of valid definitional healthcare information, with an acceptable degree of coherent and precise responses from both. The answers supplied by MedQA were more reliable that those of START in the sense that they came from specialised clinical or academic sources, most of them showing links to further research articles. Conclusions: Results obtained show the potential of this type of tool in the more general realm of information access, and the retrieval of health information. They may be considered a good, reliable and reasonably precise alternative in alleviating the information overload. Both QA systems can help professionals and users can obtain healthcare information.  相似文献   
148.
Spinal cord injury (SCI) derives in loss of bone mineral content (BMC) and bone mineral density (BMD). However, physical activity is an important determinant in bone mass acquisition, which is partially mediated through the lean mass (LM). The aim was to examine the effect of cardiorespiratory fitness (CRF) on BMD and BMC arms of adult males with SCI and able-bodied controls using the arm LM as a mediator variable. Thirty able-bodied men and thirty men with SCI participated. BMC and BMD were analysed by DXA, and indirect calorimetry was used to calculate VO2peak during a progressive arm-cranking test. When groups were divided by the amount of LM, the subgroup with highest LM had significantly higher arm BMC compared to the lowest LM subgroup (≤ 0.05) in both SCI and able-bodied groups. Moreover, same differences were found when confidence intervals were analysed. Only in the SCI group, arm LM mediated the relationship between bone mass and CRF at 30.9%, as indicated by the Sobel test (z = 2.17 and z = 2.04 for BMC and BMD, respectively). In conclusion, LM mediates the indirect association between CRF and bone health, specifically in the arms. This finding highlights the importance of having an adequate CRF for the maintenance of good bone health in SCI men.  相似文献   
149.
The aim of this study was to examine the kinematic activity profiles, cardiovascular responses and physical fitness of top-class football referees (n=11) during the FIFA Confederations Cup 2005. Computerised match-analyses (n=9) were performed with a two-dimensional photogrammetric video system, and the cardiovascular demand imposed on the referees (n=12) was measured using heart rate recordings. Total distance covered was 10,218, s=643 m of which 3531, s=510 m was covered at high intensities (>3.6 m.s(-1)). Both total distance covered (r2=0.59; P=0.02) and high-intensity activities (r2=0.44; P=0.05) were related to the distance covered by the ball in the same match. The referees ran at high speed 37% further (P=0.01) in the actual tournament than during under-17 top-level officiating. After the 5-min interval during which high-speed running peaked, in the following 5 min the performance was reduced by 19% (P=0.01) in relation to the mean of the game. Mean heart rate was 161, s=9 b.min(-1) (86, s=3% of maximal heart rate (HRmax)). Mean heart rate (expressed as percentage of HRmax) was related in part (r2=0.36; P<0.01) to the number of high-intensity activities performed in the same 5-min interval. The results of this study show that: (1) kinematic activity profiles of top-class referees can be influenced by the distance covered by the ball; (2) the amount of high-speed running (>5 m.s(-1)) best describes the physical performance of referees; (3) heart rate recording can be a useful tool to determine the most intense periods of a match and (4) the new fitness tests adopted by FIFA were poor predictors of match activities.  相似文献   
150.
Hispanic students' awareness of cultural, linguistic, and sociopolitical issues are influenced by their experiences in schools and affect their sense of identity. An examination of student discourse between bilingual gifted and bilingual general education students in an urban middle school is presented, with particular attention given to how participating bilingual students relate to each other, peers (in general and gifted education), teachers, administrators, families, and communities, and how they perceive themselves. A discussion of the core issues that emerged, including students' reawakening to their ethnic identity, differing rationales for using native language, and observed differences in self-perceptions between the gifted and general education bilingual Hispanic students is provided, along with results and implications for future research.  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