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   93399篇
  免费   2034篇
  国内免费   6篇
管理学   12750篇
民族学   573篇
人才学   31篇
人口学   7069篇
丛书文集   536篇
教育普及   3篇
理论方法论   9779篇
综合类   2141篇
社会学   43503篇
统计学   19054篇
  2023年   530篇
  2021年   595篇
  2020年   1555篇
  2019年   2291篇
  2018年   2163篇
  2017年   3231篇
  2016年   2475篇
  2015年   2109篇
  2014年   2697篇
  2013年   19190篇
  2012年   2415篇
  2011年   2258篇
  2010年   2029篇
  2009年   2257篇
  2008年   2116篇
  2007年   1942篇
  2006年   2163篇
  2005年   2382篇
  2004年   2217篇
  2003年   1955篇
  2002年   2047篇
  2001年   2031篇
  2000年   1843篇
  1999年   1738篇
  1998年   1531篇
  1997年   1377篇
  1996年   1348篇
  1995年   1348篇
  1994年   1336篇
  1993年   1310篇
  1992年   1313篇
  1991年   1218篇
  1990年   1190篇
  1989年   1046篇
  1988年   1128篇
  1987年   1017篇
  1986年   894篇
  1985年   1075篇
  1984年   1145篇
  1983年   1016篇
  1982年   945篇
  1981年   867篇
  1980年   829篇
  1979年   895篇
  1978年   782篇
  1977年   706篇
  1976年   664篇
  1975年   647篇
  1974年   530篇
  1973年   448篇
排序方式: 共有10000条查询结果,搜索用时 0 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