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   3908篇
  免费   40篇
  国内免费   2篇
教育   2807篇
科学研究   565篇
各国文化   14篇
体育   128篇
综合类   8篇
文化理论   68篇
信息传播   360篇
  2024年   3篇
  2023年   15篇
  2022年   23篇
  2021年   35篇
  2020年   53篇
  2019年   71篇
  2018年   134篇
  2017年   177篇
  2016年   235篇
  2015年   151篇
  2014年   115篇
  2013年   238篇
  2012年   184篇
  2011年   204篇
  2010年   110篇
  2009年   53篇
  2008年   102篇
  2007年   73篇
  2006年   62篇
  2005年   700篇
  2004年   479篇
  2003年   314篇
  2002年   140篇
  2001年   68篇
  2000年   36篇
  1999年   33篇
  1998年   8篇
  1997年   6篇
  1996年   9篇
  1995年   12篇
  1994年   6篇
  1993年   3篇
  1992年   10篇
  1991年   3篇
  1990年   6篇
  1989年   5篇
  1988年   7篇
  1987年   7篇
  1986年   7篇
  1984年   4篇
  1981年   5篇
  1979年   4篇
  1978年   5篇
  1976年   4篇
  1975年   2篇
  1974年   4篇
  1968年   4篇
  1967年   2篇
  1956年   2篇
  1935年   2篇
排序方式: 共有3950条查询结果,搜索用时 15 毫秒
121.
The study's purpose was to identify the mediating role of intention and the stages of change (SOC) in physical activity (PA) over a 6-month period using two models (theory of planned behavior [TPB] and TPB/SOC). Participants were 143 adults with physical disabilities (70.68% response rate; M age = 46.03). The TPB constructs, SOC (time 1), and PA (time 2) were assessed using standardized self-report questionnaires. Based on path analyses, attitude had the highest effect on intention and SOC followed by perceived behavioral control within both well-fit models. The variance in PA explained by the first (TPB) and second (TPB/SOC) models was 16% and 28% respectively. In the just identified model of TPB/SOC, the direct effect of SOC on physical activity remained strong (gamma(soc.pa) = .45) and SOC approached full mediation through attitude. Health promotion interventions need to include both intention and behavior elements (SOC) reinforcing increased PA value and barrier elimination.  相似文献   
122.
123.
The overall purpose of this study was to create a model of positive youth development (PYD) through sport grounded in the extant qualitative literature. More specifically, the first objective was to review and evaluate qualitative studies of PYD in sport. The second objective was to analyze and synthesize findings from these studies. Following record identification and screening, 63 articles were retained for analysis. Meta-method analysis revealed strengths of studies were the use of multiple data collection and validity techniques, which produced high-quality data. Weaknesses were limited use of ‘named’ methodologies and inadequate reporting of sampling procedures. Philosophical perspectives were rarely reported, and theory was used sparingly. Results of an inductive meta-data analysis produced three categories: PYD climate (adult relationships, peer relationships, and parental involvement), life skills program focus (life skill building activities and transfer activities), and PYD outcomes (in personal, social, and physical domains). A model that distinguishes between implicit and explicit processes to PYD is presented.  相似文献   
124.
In many Western science systems, funding structures increasingly stimulate academic research to contribute to practical applications, but at the same time the rise of bibliometric performance assessments have strengthened the pressure on academics to conduct excellent basic research that can be published in scholarly literature. We analyze the interplay between these two developments in a set of three case studies of fields of chemistry in the Netherlands. First, we describe how the conditions under which academic chemists work have changed since 1975. Second, we investigate whether practical applications have become a source of credibility for individual researchers. Indeed, this turns out to be the case in catalysis, where connecting with industrial applications helps in many steps of the credibility cycle. Practical applications yield much less credibility in environmental chemistry, where application-oriented research agendas help to acquire funding, but not to publish prestigious papers or to earn peer recognition. In biochemistry practical applications hardly help in gaining credibility, as this field is still strongly oriented at fundamental questions. The differences between the fields can be explained by the presence or absence of powerful upstream end-users, who can afford to invest in academic research with promising long term benefits.  相似文献   
125.
126.
127.
128.
129.
The main function of agricultural extension is generally thought to be the transfer through nonformal educational means of practical knowledge to agriculture and the enhancement of rural development. Agricultural extension has received renewed attention in recent years from international development agencies and considerable discussion has ensued regarding the appropriate role for extension programmes. Much of the attention has been directed towards improving the functions of existing services. This article discusses the policy considerations of extension within the broader context of agricultural development goals and the overall direction of the country's development objectives and strategies. A framework is presented for analysing important characteristics of different extension development options. The issues raised are relevant to the larger concerns of adult education policy and the promotion of lifelong learning strategies within society. They include the relationship of sectoral goals and policies to broader national objectives, the audience the public sector should target, the role of the private sector, the structural arrangements best suited to meet certain objectives and the correct mixture and co‐ordination of various services and programmes.  相似文献   
130.
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