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   93427篇
  免费   2005篇
  国内免费   3篇
管理学   12556篇
民族学   573篇
人才学   26篇
人口学   7289篇
丛书文集   538篇
教育普及   2篇
理论方法论   9576篇
现状及发展   1篇
综合类   2197篇
社会学   43625篇
统计学   19052篇
  2023年   522篇
  2021年   581篇
  2020年   1543篇
  2019年   2250篇
  2018年   2178篇
  2017年   3246篇
  2016年   2460篇
  2015年   2074篇
  2014年   2665篇
  2013年   18995篇
  2012年   2545篇
  2011年   2305篇
  2010年   2051篇
  2009年   2261篇
  2008年   2182篇
  2007年   1965篇
  2006年   2164篇
  2005年   2379篇
  2004年   2247篇
  2003年   1946篇
  2002年   2050篇
  2001年   2060篇
  2000年   1824篇
  1999年   1715篇
  1998年   1516篇
  1997年   1370篇
  1996年   1323篇
  1995年   1344篇
  1994年   1332篇
  1993年   1301篇
  1992年   1311篇
  1991年   1240篇
  1990年   1210篇
  1989年   1046篇
  1988年   1132篇
  1987年   1009篇
  1986年   919篇
  1985年   1086篇
  1984年   1142篇
  1983年   1026篇
  1982年   951篇
  1981年   868篇
  1980年   826篇
  1979年   875篇
  1978年   778篇
  1977年   720篇
  1976年   661篇
  1975年   648篇
  1974年   524篇
  1973年   443篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
The historical relationship between the electoral college and controversial U.S. presidential elections, specifically with respect to conflict, is examined. The elections of 1800, 1824, 1860, 1876, 1888, 1968, and 2000 are examined. Aside from the 2000 election, there has been essentially no conflict in American history due to the electoral college. The constitutional structure and thinking behind the form of the electoral college is given, with emphasis on the federal aspects of the structure. The current movement to abolish the electoral college in favor of direct popular vote is depicted, along with the arguments against making that change. The conclusion is that we as a nation are far better off to retain the status quo than to make the called-for change.  相似文献   
22.
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   
23.
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   
24.
25.
26.
27.
28.
29.
30.
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   
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