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   11287篇
  免费   422篇
  国内免费   173篇
教育   7546篇
科学研究   2137篇
各国文化   51篇
体育   613篇
综合类   479篇
文化理论   34篇
信息传播   1022篇
  2024年   9篇
  2023年   75篇
  2022年   246篇
  2021年   332篇
  2020年   380篇
  2019年   374篇
  2018年   380篇
  2017年   349篇
  2016年   373篇
  2015年   413篇
  2014年   753篇
  2013年   1113篇
  2012年   947篇
  2011年   886篇
  2010年   654篇
  2009年   522篇
  2008年   598篇
  2007年   687篇
  2006年   603篇
  2005年   524篇
  2004年   462篇
  2003年   399篇
  2002年   297篇
  2001年   222篇
  2000年   128篇
  1999年   48篇
  1998年   31篇
  1997年   24篇
  1996年   15篇
  1995年   7篇
  1994年   10篇
  1993年   8篇
  1992年   3篇
  1990年   1篇
  1989年   1篇
  1983年   1篇
  1979年   1篇
  1977年   1篇
  1976年   2篇
  1957年   3篇
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
1.
This editorial paper presents 11 papers related to the special issue proposed by UNICEF on the Education Response to COVID-19. The COVID-19 pandemic provoked an education emergency of unprecedented scale. At its onset in February 2020, school closures were announced in the worst-hit countries. At the peak of the crisis, 90 per cent of learners worldwide had had their education disrupted. Some learners, especially those from the most marginalised population groups, were put at risk of permanent dropout, provoking long-term and significant negative effects on children’s life-long wellbeing and the socio-economic development of their communities and countries. This special issue, which received contributions from UNICEF staff and various researchers, focuses on the impact of school closures, the effectiveness of remote learning solutions, equity implications, the mitigation of learning loss and notions around re-opening better. Different research perspectives and evidence is gathered to help strengthen policy considerations and future planning. The conclusion emphasizes building on the innovative solutions generated by the response to the crisis to make education systems more resilient, whilst also reinforcing the focus on equity and inclusion so that pre-existing disparities are not exacerbated in the future.  相似文献   
2.
3.
ABSTRACT

This article suggests that situations in which multiple research teams are convened under similar conditions present an opportunity to discover factors that lead to productive collaboration. It argues that social network analysis of research team outputs becomes more valuable when paired with data about research participant perceptions; and that any variables used as indicators of collaboration need to be calibrated using datasets from multiple studies with cross-team comparisons. The article provides an example of the kind of methodology needed to achieve this, describing a study with data from four research teams based at an Australian university campus, reporting their research performance over four years under conditions in which many variables were controlled and with results augmented by a survey of participant perceptions. Findings from the study indicate that there were exceptions to hypothesized associations between participant perceptions of collaboration and specific social network analysis measures over co-authorship data. The article suggests that, given the methodological challenges of studying research teams in the field, multiple datasets combining findings such as those in the present study are a path towards the development of indicators of productive higher education research collaboration.  相似文献   
4.
Although Affirmative Action policies have been enforced in many countries, their consequences are highly understudied, especially in the context of developing economies. Section 12(1)(c) of the Right to Education (RTE) Act enforced in 2009 is the first attempt to introduce affirmative action in primary schools in India. The act requires all private schools to reserve at least twenty five percent seats for children from economically weaker sections. To understand the effect of the act on i) social integration and ii) academic outcomes, we asked 1500 children (grades one to three) from four schools to answer friendship surveys and short tests in Mathematics and English. The schools in our sample vary considerably in constitution and were intentionally chosen to understand the impact of the act in different school settings. The friendship surveys show strong homophily i.e. non-RTE students cite other non-RTE students as friends, while RTE students chose to be friends primarily with other RTE students. Trends in test scores reveal that students admitted under the RTE quota score significantly lower than non-RTE students. However, RTE students who have a higher share of non-RTE friends have better test scores, suggesting that affirmative action may have a positive influence on learning outcomes for RTE children. Further we note that commitment from the school authorities and systematic monitoring and evaluation of the implementation of the act will go a long way in bringing out some of the benefits that this act was designed to achieve. Our findings have important policy implications with respect to ensuring proper implementation of the Section12(1)(c) of the RTE act in schools across the country.  相似文献   
5.
Data from China demonstrate that the effect of the number of siblings on education is restricted by many factors, such as children’s gender, urban or rural household registration, whether there is only one child, the birth order of children within the family, and parents’ status. Chinese families have significant preferences for the eldest son and the youngest son. Moreover, research based on the natural experiment and instrumental variable approach suggests that market-oriented reform of education has increased the cost of family education expenditures since China’s reform and opening up, which further aggravates the negative impact on education of having many siblings in an urban setting.  相似文献   
6.
ABSTRACT

Reformers in developing countries increasingly seek to raise education quality. Yet we know little about the politics of improving education. One significant and instructive case of reforms designed to boost education quality comes from Chile, where in 2016 the government enacted a sweeping reform of teaching careers. This paper first uses a quantitative analysis of appearances in the news to identify key stakeholders and then turns to process tracing to analyze how and when these stakeholders influenced reform dynamics. Comparatively, the Chilean case differs from similar reforms elsewhere in Latin America due to the absence of business, the strong role of policy networks, and the final negotiated settlement with the teacher union. Theoretically, the analysis confirms general theories that emphasize the roles of distributive politics and policy networks.  相似文献   
7.
This article discusses the rapid changes that have taken place in high-stakes examination policy in Turkey by situating the policy change in the larger debate around the transformation of the education system. A large body of literature has discussed ways in which policy changes in national examinations have interacted with the neoliberal and raced structures in education, thus contributing to the creation and reproduction of educational inequalities. This article contributes to this body of literature by discussing how changes in high-stakes examination systems have interacted with the neoliberal Islamization of education in Turkey and have contributed to the creation of new forms of inequalities. The article also demonstrates how the characteristics of policy change to high-stakes examinations can differ depending on the hegemonic power relations at play.  相似文献   
8.
《Sport Management Review》2020,23(2):315-329
In many countries, voluntary sports clubs are the main recipients of public subsidies regarding the provision of recreational sport, and the economically most important level of government is usually the local government (i.e. the municipalities). The purpose of this article is to examine whether and how municipal framework conditions matter for sports clubs. Inspired by previous studies, we examine the role of direct and indirect public subsidies as well as facility coverage. The authors conduct analyses on a general level (for all sports) and specifically for five sports (badminton, football, gymnastics, handball and swimming). The differentiation between sports allows us to examine how municipal framework conditions might be associated differently with density and participation across sports. In the statistical analyses, the authors apply data collected among all 98 Danish municipalities. The results show that the municipal levels of direct and indirect subsidies are weakly correlated with both the density of and participation in sports clubs, while stronger correlations can be identified with regard to facility coverage. The analyses for the five sports reveal that the supply of relevant facility types is – with few exceptions – positively correlated with sports club density and participation levels within each sport. Thus, facility coverage seems to play a more important role for sports clubs than the levels of indirect and particularly direct subsidies.  相似文献   
9.
身体活动与健康促进是公共卫生及运动科学领域研究的重点方向之一。个体一日24 h由睡眠、久坐及各种强度的身体活动组成,已有研究多从单一维度探讨这些行为对健康的影响,忽视了身体活动、久坐、睡眠等行为之间的内在联系及对健康结果的综合影响,可能使相应行为与健康效应间的关联产生偏差。时间使用流行病学研究方法的引入克服了这一不足。以“时间分配”作为切入点,综述国际学术界关于身体活动、久坐和睡眠行为对健康影响的研究现状,并系统阐述了等时替代研究方法、活动-平衡模型、时间使用流行病学的发展及其研究框架。基于此,展望了时间使用流行病学相关理论在身体活动研究领域的应用前景:1、开发新式测量工具并完善数据收集和分析方法;2、建立有关时间使用模式的综合评价体系;3、制订我国大众人群的活动-平衡时间分配推荐指南方案。  相似文献   
10.
晋升锦标赛下,官员在有限任期内存在晋升预期差异,由此导致的短视行为的变化可能对创新产出造成影响。然而现有文献并未从官员晋升动机视角深入研究城市创新的制度动因,也未曾厘清官员任期等政治体制对创新活动的具体影响机制。本文利用2004—2016年285个城市的面板数据,通过多元统计回归分析,实证检验了官员任期如何通过经济增长目标影响城市创新的机制路径,并从土地财政、环境治理视角提出了新机制路径。研究发现:(1)相对于市长,市委书记任期对城市创新的影响更大,且呈现出显著的倒U型关系;(2)市委书记的更替显著抑制了城市创新水平的提升;(3)机制分析发现,市委书记的任期通过动态影响经济增长目标制定,土地财政依赖以及环境治理水平进而对城市创新产生影响。譬如当经济增长目标越高,官员越倾向于采用短视的扩张策略刺激经济,进而减少对创新活动的投入;(4)异质性分析发现在市场化条件较好,东部以及城市规模较大的地区,市委书记任期对创新的U型特征仍然显著。本文建议政府在推进财政分权体制改革时,应采用因地制宜的推进方式,将“有效市场”与“有为政府”更好地结合起来。本文研究结论丰富了晋升锦标赛理论的经验证据,有助于理...  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