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   90594篇
  免费   1996篇
  国内免费   4篇
管理学   12263篇
民族学   537篇
人才学   25篇
人口学   6897篇
丛书文集   520篇
理论方法论   9471篇
综合类   2112篇
社会学   41971篇
统计学   18798篇
  2023年   515篇
  2021年   569篇
  2020年   1537篇
  2019年   2224篇
  2018年   2097篇
  2017年   3172篇
  2016年   2392篇
  2015年   2068篇
  2014年   2663篇
  2013年   18958篇
  2012年   2326篇
  2011年   2123篇
  2010年   1942篇
  2009年   2180篇
  2008年   2023篇
  2007年   1836篇
  2006年   2084篇
  2005年   2264篇
  2004年   2158篇
  2003年   1863篇
  2002年   1980篇
  2001年   1951篇
  2000年   1745篇
  1999年   1656篇
  1998年   1494篇
  1997年   1345篇
  1996年   1290篇
  1995年   1305篇
  1994年   1285篇
  1993年   1273篇
  1992年   1252篇
  1991年   1188篇
  1990年   1157篇
  1989年   1021篇
  1988年   1080篇
  1987年   977篇
  1986年   861篇
  1985年   1045篇
  1984年   1097篇
  1983年   994篇
  1982年   916篇
  1981年   844篇
  1980年   804篇
  1979年   851篇
  1978年   761篇
  1977年   685篇
  1976年   649篇
  1975年   625篇
  1974年   518篇
  1973年   423篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
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   
22.
23.
24.
25.
26.
27.
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   
28.
29.
30.
Abstract In recent years, church burnings in the South have attracted a great deal of attention. Many commentators have charged that they are a product of strained race relations throughout the South, and particularly of severe racial tensions in Southern rural areas. In this study we evaluate these claims. We begin by mapping the spatial coordinates of recorded church burnings from 1990 to 1997, and find that church arsons indeed are concentrated in the South. Church burnings, however, are a more urban phenomenon than popular media accounts would suggest. Our analysis then explores the influence of contextual factors (population and locale, racial composition and inequality, so‐cioeconomic conditions, local religious ecology, and patterns of reported crime) on church burnings in counties located in the study region. Logistic regression models confirm that church arsons are most likely to occur in small metropolitan statistical areas (MSAs) and non‐MSA counties containing a city of at least 10,000 residents. Church burnings also are especially likely in counties with a higher percentage of black residents, a larger number of churches relative to the rest of the state, and a higher arson rate. We conclude by discussing the implications of these findings for future research and public policy.  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