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   88915篇
  免费   1948篇
  国内免费   3篇
管理学   12134篇
民族学   525篇
人才学   25篇
人口学   6627篇
丛书文集   505篇
理论方法论   9326篇
综合类   2080篇
社会学   40952篇
统计学   18692篇
  2023年   506篇
  2021年   560篇
  2020年   1497篇
  2019年   2193篇
  2018年   2014篇
  2017年   3096篇
  2016年   2319篇
  2015年   2033篇
  2014年   2613篇
  2013年   18802篇
  2012年   2270篇
  2011年   2033篇
  2010年   1901篇
  2009年   2139篇
  2008年   1963篇
  2007年   1755篇
  2006年   2024篇
  2005年   2212篇
  2004年   2104篇
  2003年   1824篇
  2002年   1929篇
  2001年   1901篇
  2000年   1683篇
  1999年   1613篇
  1998年   1467篇
  1997年   1323篇
  1996年   1273篇
  1995年   1307篇
  1994年   1277篇
  1993年   1254篇
  1992年   1228篇
  1991年   1151篇
  1990年   1133篇
  1989年   977篇
  1988年   1077篇
  1987年   959篇
  1986年   847篇
  1985年   1019篇
  1984年   1091篇
  1983年   982篇
  1982年   907篇
  1981年   846篇
  1980年   794篇
  1979年   851篇
  1978年   753篇
  1977年   674篇
  1976年   642篇
  1975年   627篇
  1974年   499篇
  1973年   429篇
排序方式: 共有10000条查询结果,搜索用时 15 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