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   90913篇
  免费   1986篇
  国内免费   5篇
管理学   12389篇
民族学   538篇
人才学   26篇
人口学   6850篇
丛书文集   522篇
理论方法论   9442篇
综合类   2122篇
社会学   42072篇
统计学   18943篇
  2023年   517篇
  2021年   570篇
  2020年   1514篇
  2019年   2231篇
  2018年   2086篇
  2017年   3166篇
  2016年   2399篇
  2015年   2060篇
  2014年   2653篇
  2013年   19035篇
  2012年   2337篇
  2011年   2111篇
  2010年   1955篇
  2009年   2202篇
  2008年   2065篇
  2007年   1860篇
  2006年   2124篇
  2005年   2291篇
  2004年   2148篇
  2003年   1903篇
  2002年   2010篇
  2001年   1943篇
  2000年   1727篇
  1999年   1657篇
  1998年   1487篇
  1997年   1348篇
  1996年   1298篇
  1995年   1306篇
  1994年   1280篇
  1993年   1273篇
  1992年   1245篇
  1991年   1179篇
  1990年   1151篇
  1989年   1009篇
  1988年   1093篇
  1987年   973篇
  1986年   854篇
  1985年   1029篇
  1984年   1115篇
  1983年   983篇
  1982年   937篇
  1981年   853篇
  1980年   808篇
  1979年   851篇
  1978年   761篇
  1977年   695篇
  1976年   654篇
  1975年   626篇
  1974年   509篇
  1973年   436篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Concurrent and longitudinal associations between peer crowd affiliation and internalized distress were examined in a sample of 246 youth (148 girls, 98 boys). Children completed measures of depression, social anxiety, loneliness, and self‐esteem when they were in grades 4 to 6 (Time 1), and again 6 years later during adolescence (grades 10 – 12; Time 2). At Time 2, adolescents also reported their self‐concept and their identification with reputation‐based peer crowds, including Populars, Jocks, Brains, Burnouts, Non‐Conformists, and None/Average crowds. Results indicated that adolescents' report of peer crowd affiliation was concurrently associated with self‐concept and levels of internalizing distress. Follow‐back analyses of internalizing trajectories revealed that Populars/Jocks had experienced significant declines in internalizing distress across development, whereas Brains exhibited some increases in internalizing distress between childhood and adolescence.  相似文献   
62.
63.
The hypothesis that irritability and contingency detection are negatively correlated was examined in thirty‐one 6‐month‐old infants. Observation and maternal report‐based assessments of irritability were correlated with both a criterion score and a continuous score of contingency detection. Results indicated that greater irritability in infants was associated with lower contingency detection scores. Discussion focuses on identifying processes by which the 2 constructs may be associated.  相似文献   
64.
Editorial     
Ohne Zusammenfassung
Editorial
  相似文献   
65.
66.
67.
Recent research has demonstrated that Democrats and Republicansare divided along religious lines–98) confirm that thelink between religiosity and Republican Party identificationis stronger among younger than older voters.  相似文献   
68.
69.
We study experimentally a standard four-player Hotelling location game with a uniform density of consumers and inelastic demand. The pure strategy Nash equilibrium configuration consists of two firms located at one quarter of the "linear city," and the other two at three quarters. We do not observe convergence to such an equilibrium. In our experimental data we find three clusters. Besides the direct proximity of the two equilibrium locations, this concerns the focal midpoint. Moreover, we observe that whereas this midpoint appears to become more notable over time, other focal points fade away. We explain how these observations are related to best-response dynamics, and to the fact that the players rely on best-responses in particular when they are close to the equilibrium configuration.  相似文献   
70.
TOOLS OR TOYS? THE IMPACT OF HIGH TECHNOLOGY ON SCHOLARLY PRODUCTIVITY   总被引:1,自引:0,他引:1  
We examine the impact of communication technology on scholarly productivity by considering patterns of coauthored economics articles. Using articles in three major economics journals from 1970–79 and 1992–96, we find (1) sharp growth from distant coauthorships (authors not in the same metropolitan area prior to publication), as the theory predicts, and, contrary to theory, (2) lower productivity of distant than close-coauthored works and no decline in their relative disadvantage. These findings are reconciled by noting that high technology has aspects of a consumer good. The relative productivity of solo-authored articles has decreased, perhaps explaining the secular increase in coauthorship.  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