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   91596篇
  免费   1977篇
  国内免费   18篇
管理学   12329篇
民族学   553篇
人才学   25篇
人口学   6892篇
丛书文集   603篇
理论方法论   9417篇
综合类   2675篇
社会学   42326篇
统计学   18771篇
  2023年   509篇
  2021年   574篇
  2020年   1517篇
  2019年   2199篇
  2018年   2076篇
  2017年   3162篇
  2016年   2371篇
  2015年   2055篇
  2014年   2643篇
  2013年   18879篇
  2012年   2440篇
  2011年   2242篇
  2010年   2054篇
  2009年   2236篇
  2008年   2138篇
  2007年   1954篇
  2006年   2183篇
  2005年   2350篇
  2004年   2165篇
  2003年   1879篇
  2002年   1992篇
  2001年   1996篇
  2000年   1766篇
  1999年   1677篇
  1998年   1491篇
  1997年   1327篇
  1996年   1289篇
  1995年   1317篇
  1994年   1288篇
  1993年   1269篇
  1992年   1257篇
  1991年   1195篇
  1990年   1174篇
  1989年   1023篇
  1988年   1122篇
  1987年   990篇
  1986年   888篇
  1985年   1063篇
  1984年   1120篇
  1983年   1002篇
  1982年   934篇
  1981年   860篇
  1980年   798篇
  1979年   860篇
  1978年   758篇
  1977年   682篇
  1976年   649篇
  1975年   632篇
  1974年   516篇
  1973年   433篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
A study sample of 162 six‐month‐old children was selected from a larger sample of 346 infants on the basis of parents' report of their infants' temperament and a laboratory assessment of temperament. Infants were classified as easily frustrated and less easily frustrated and compared on a number of emotion regulation, physiology, and temperament measures. Results indicated that male and female infants were equally likely to be classified as frustrated and less easily frustrated; however, male infants were less able to regulate physiologically. Easily frustrated infants used different emotion regulation strategies and were observed to be less attentive and more active than less easily frustrated infants when observed in the laboratory. These infants were also characterized by their parents as more active, less attentive, and more distressed to novelty. Infants classified as easily frustrated were more reactive physiologically and less able to regulate physiological reactivity than their less easily frustrated counterparts. It is hypothesized that this cluster of characteristics may constitute a unique temperamental type that may have implications for other types of behavioral functioning. Limitations of the study are that observations are based on a single brief assessment of the infant, modest effect sizes were found, and the study is cross‐sectional.  相似文献   
22.
The product of two independent or dependent scalar normal variables, sums of products, sample covariances, and general bilinear forms are considered. Their distributions are shown to belong to a class called generalized Laplacian. A growth-decay mechanism is also shown to produce such a generalized Laplacian. Sets of necessary and sufficient conditions are derived for bilinear forms to belong to this class. As a generalization, the distributions of rectangular matrices associated with multivariate normal random vectors are also discussed.  相似文献   
23.
24.
25.
26.
27.
28.
The authors examined the impact of sense of coherence on the career thought processes of a sample of college students. A. Antonovsky (1987) defined sense of coherence as the global orientation that the world is comprehensible, manageable, and meaningful. Study participants completed the Sense of Coherence Scale (A. Antonovsky, 1987) and the Career Thoughts Inventory (CTI; J. P. Sampson, G. W. Peterson, J. G. Lenz, R. C. Reardon, & D. E. Saunders, 1996). Multivariate tests indicated a medium relationship between sense of coherence and CTI Total and subscale scores; sense of coherence accounted for 14% of the variance. Univariate tests also indicated a medium relationship between sense of coherence and each subscale.  相似文献   
29.
30.
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