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   8550篇
  免费   94篇
  国内免费   3篇
教育   6018篇
科学研究   1026篇
各国文化   79篇
体育   516篇
综合类   2篇
文化理论   61篇
信息传播   945篇
  2021年   70篇
  2020年   87篇
  2019年   149篇
  2018年   201篇
  2017年   170篇
  2016年   170篇
  2015年   110篇
  2014年   151篇
  2013年   1612篇
  2012年   159篇
  2011年   160篇
  2010年   138篇
  2009年   140篇
  2008年   153篇
  2007年   128篇
  2006年   141篇
  2005年   117篇
  2004年   141篇
  2003年   103篇
  2002年   107篇
  2001年   132篇
  2000年   132篇
  1999年   117篇
  1998年   79篇
  1997年   82篇
  1996年   93篇
  1995年   74篇
  1994年   70篇
  1993年   107篇
  1992年   126篇
  1991年   127篇
  1990年   125篇
  1989年   115篇
  1988年   103篇
  1987年   126篇
  1986年   109篇
  1985年   126篇
  1984年   111篇
  1983年   118篇
  1982年   114篇
  1981年   104篇
  1980年   98篇
  1979年   123篇
  1978年   115篇
  1977年   102篇
  1976年   91篇
  1975年   66篇
  1974年   85篇
  1973年   85篇
  1971年   66篇
排序方式: 共有8647条查询结果,搜索用时 15 毫秒
991.
In this longitudinal study, individual differences in security of attachment at 18 months and effective autonomous functioning at age 2 years were related to the dimensions of ego-control and ego-resiliency at age 4--5 years. The kindergarten or nursery school teachers of 26 children completed California Child Q-Sorts. The children were also given a short form of the Block's laboratory battery (Banta's curiosity box, level of aspiration, motor impulse control delay of gratification, the Shure and Spivack Preschool Interpersonal Problem-solving Test, and the Lowenfeld mosaics). Following the Blocks, composited ego-resiliency and ego-control scores were derived from each data set. Children earlier classified as securely attached were, as predicted, significantly higher on ego-resiliency on both laboratory and Q-sort composites. They were also higher than anxiously attached infants on 3 independent measures of curiosity. An independently composited index of competence from 2-year tool-using measures also correlated significantly with later resiliency, as did 2-year measures of mothers' support and quality of assistance. The data provide initial links between the infant's quality of attachment, the toddler's effectiveness in a problem-solving situation, and competence during the preschool years.  相似文献   
992.
993.
This study investigated the understanding of science process skills (SPS) of 329 science teachers from 52 primary schools selected by random sampling. The understanding of SPS was measured in terms of conceptual and operational aspects of SPS using an instrument called the Science Process Skills Questionnaire (SPSQ) with a Cronbach’s alpha reliability of 0.88. The findings showed that the teachers’ conceptual understanding of SPS was much weaker than their practical application of SPS. The teachers’ understanding of SPS differed by their teaching qualifications but not so much by their teaching experience. Emphasis needs to be given to both conceptual and operational understanding of SPS during pre-service and in-service teacher education to enable science teachers to use the skills and implement inquiry-based lessons in schools.  相似文献   
994.
This article is a summary and comparison of accreditation standards in marriage and family counseling and therapy by two accreditation bodies.  相似文献   
995.
996.
997.
The authors model the class size and teaching load decisions of academic departments in terms of a departmental utility function. Utility is postulated to be asymmetric around class size and teaching load norms, and variables for curricular structure, disciplinary domain, and institutional type are taken into account. Maximization of the utility function produces decision rules for the number of sections to be offered for each course, and hence the faculty's overall teaching load. A nonlinear estimator is developed for the decision rules' parameters and applied to data from four liberal arts colleges and two research universities. Results are consistent with theories about faculty discretionary time and with expectations about the effects of curricular structure on class size. The paper concludes with a discussion about the effects of enrollment uncertainty on faculty load decisions.  相似文献   
998.
999.
This study addresses the health of young children and how to safely and effectively care for children with diarrhea in the home and in early child care settings. A baseline survey showed the prevalence of oral rehydration solution (ORS) usage at last diarrhea bout to be low. An educational workshop was developed to train parents and child care professionals on how to properly manage young children with diarrhea and reduce the risk of diarrhea spread at home and in early childhood settings. Specific intervention activities are discussed and program activities, including specially designed materials for mixing homemade ORS are described. A comparison of pre- and postintervention data indicates substantial gains in knowledge among both urban and rural populations. Implications of research findings are discussed along with suggestions for future research.  相似文献   
1000.
In this paper we describe how progressive download and adaptive streaming can be combined into a simple and efficient streaming framework. Based on the MPEG-4 file format (MP4) we use HTTP for transport and argue that these two components are sufficient for specifying an open streaming architecture. The client selects appropriate chunks from the MP4 file to be transferred based on (1) the header information (i.e. the “moov” box) in the first part of the file and (2) his observation of network throughput. The framework is completely client driven which allows for better server scalability and reduces signalling overhead. We discuss architecture and implementation issues such as complexity, interoperability and scalability and compare to 3GPP PSS Rel-6 adaptive streaming when appropriate. Measurements from a simple MP4/HTTP streaming client are presented showing that appropriate chunks are selected such that increased reliability is achieved.  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