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   2231篇
  免费   46篇
  国内免费   1篇
教育   1821篇
科学研究   69篇
各国文化   22篇
体育   88篇
综合类   1篇
文化理论   15篇
信息传播   262篇
  2023年   11篇
  2022年   15篇
  2021年   20篇
  2020年   38篇
  2019年   55篇
  2018年   64篇
  2017年   75篇
  2016年   75篇
  2015年   43篇
  2014年   66篇
  2013年   522篇
  2012年   54篇
  2011年   56篇
  2010年   48篇
  2009年   49篇
  2008年   62篇
  2007年   52篇
  2006年   55篇
  2005年   49篇
  2004年   45篇
  2003年   27篇
  2002年   33篇
  2001年   35篇
  2000年   40篇
  1999年   29篇
  1998年   19篇
  1997年   30篇
  1996年   26篇
  1995年   33篇
  1994年   28篇
  1993年   34篇
  1992年   29篇
  1991年   33篇
  1990年   29篇
  1989年   23篇
  1988年   25篇
  1987年   27篇
  1986年   18篇
  1985年   23篇
  1984年   19篇
  1983年   23篇
  1982年   24篇
  1981年   25篇
  1980年   22篇
  1979年   22篇
  1978年   16篇
  1977年   15篇
  1976年   21篇
  1974年   11篇
  1972年   11篇
排序方式: 共有2278条查询结果,搜索用时 31 毫秒
61.
Youth on the street: Abuse and neglect in the eighties   总被引:2,自引:0,他引:2  
This paper discusses the findings of a study of runaways and homeless youth who were interviewed on the street the last week of every month on five week nights from late afternoon until 2 a.m. over a period of one year. The data derived from 489 interviews provided some interesting insights. Two distinct groups emerged from the analysis, generating a tentative hypothesis that the true "runners" tend to leave their homes with the intention of not returning and thus their runs are extended; the second group, designated "in and outers," use the run as a temporary coping mechanism. Their runs tend to be impulsive and of short duration. The study found that runaways (in particular the runners) are at great risk of being drawn into illegal activities. Major factors affecting this risk are distance from home and length of time on the run. A significant proportion of the youth interviewed had run from substitute care arrangements, and a disturbing implication emerging from the research is that adolescents in our society suffer from systemic abuse and neglect. One outcome of this piece of research was the opening of a safe house for early runners in January 1987. The operation of the house includes careful compilation of data to further advance understanding of the runaway population and its needs.  相似文献   
62.
Texts     
Made in America: Immigrant Students in Our Public Schools. Laurie Olsen, New York: The New Press, 1997, 276 pages, $25.00 (hardcover), ISBN 1–5658–4400–9, and $14.95 (softcover), ISBN 1–5658–4471–8.

The Power of Their Ideas: Lessons for America From a Small School in Harlem. Deborah Meier, Boston: Beacon Press, 1995, 190 pages, $12.00 (softcover). ISBN 0–8070–3111–9.

Yesterday, Today & Tomorrow: Meeting the Challenge of Our Multicultural America & Beyond. Paul D. Christiansen and Michelle Young, San Francisco: Gaddo Gap Press, 1996, 376 pages, $29.95 (softcover). ISBN 1–8801–9218–7.  相似文献   
63.
64.
65.
66.
The classical criteria for controllability and observability are given a tensorial formulation which is then extended into Boolean form directly related to a digraph interpretation of system structure. This is examined in detail with particular reference to group theoretic aspects, invariant properties under transformation, the term rank test and the existence of zero eigenvalues.Within this framework the structural design concepts of potential controllability and observability are presented in generalised terms.  相似文献   
67.
The graph theoretic aspects of controllability and observability are examined and related to the tensorial formulation of Part I of the paper. Particular emphasis is given to the significance of the system digraph decomposition and the relevance of this to certain system algebraic properties of interest in control theory.  相似文献   
68.
This project was designed to provide a retrospective analysis of the parent training literature during the last decade. Eighteen journals with behavioral psychology, clinical/counseling psychology, school psychology, and special education emphases were selected for review. Data related to the number of articles published in each journal, year of article publication, referral problem, and contributing institution were collected. Results indicate that behavioral journals published the most empirically based parent training articles (66%), followed by clinical/counseling psychology (26%), special education (6%), and school psychology (3%) journals. Parents with noncompliant, handicapped, or abused/neglected children comprised the majority (58%) of research participants. Suggestions for involving school psychologists in parent training research and broadening the focus of parent training to include preventive, as well as remedial, efforts are presented.  相似文献   
69.
70.
The very short time now available in higher education institutions for the coverage of subject‐specific content in PGCE courses gives problems in ensuring adequate time for effective workshop safety training, especially for those students who will be responsible for the management of pupils in resistant materials workshops. The schedule prescribed by the National Association of Advisers and Inspectors in Design and Technology (NAAIDT) provides a recognised base for the content of such courses. This paper examines the theoretical issues involved, weighs conflicting demands and describes one solution found workable under the current NAAIDT scheme.  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