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   28575篇
  免费   511篇
管理学   3717篇
民族学   195篇
人才学   6篇
人口学   4015篇
丛书文集   109篇
教育普及   2篇
理论方法论   2205篇
现状及发展   1篇
综合类   515篇
社会学   13563篇
统计学   4758篇
  2023年   93篇
  2022年   78篇
  2021年   93篇
  2020年   286篇
  2019年   460篇
  2018年   2029篇
  2017年   2234篇
  2016年   1479篇
  2015年   392篇
  2014年   474篇
  2013年   3176篇
  2012年   971篇
  2011年   1673篇
  2010年   1459篇
  2009年   1187篇
  2008年   1279篇
  2007年   1461篇
  2006年   471篇
  2005年   641篇
  2004年   661篇
  2003年   601篇
  2002年   474篇
  2001年   482篇
  2000年   403篇
  1999年   404篇
  1998年   314篇
  1997年   286篇
  1996年   319篇
  1995年   273篇
  1994年   261篇
  1993年   253篇
  1992年   291篇
  1991年   294篇
  1990年   266篇
  1989年   260篇
  1988年   261篇
  1987年   232篇
  1986年   221篇
  1985年   249篇
  1984年   239篇
  1983年   240篇
  1982年   181篇
  1981年   160篇
  1980年   174篇
  1979年   174篇
  1978年   142篇
  1977年   141篇
  1976年   125篇
  1975年   120篇
  1974年   98篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
943.
944.
945.
946.
Increasing obesity among Americans is a serious issue in the US, especially in the pediatric and young adult population. We use a longitudinal design to examine the relationship between childhood poverty/welfare receipt and obesity onset and continuity from adolescence into young adulthood using three waves of the National Longitudinal Study of Adolescent Health. We include multiple measures of disadvantage that co-occur with poverty and model potential mediating mechanisms within a life course framework. We find a significant effect of poverty/welfare receipt in childhood on obesity outcomes for females, but not for males. However, other measures of socioeconomic disadvantage such as neighborhood poverty, and low parental education are related to obesity in both males and females. Poverty may impact female obesity through the mediating effects of physical activity, inadequate sleep, skipping breakfast and certain forms of parental monitoring, while race is an important confounder of poverty’s influence. This paper highlights the important influence of poverty and other aspects of social disadvantage on obesity outcomes during this critical transition to adulthood. Implications of this research include physical activity and parenting interventions for low-income youth. In addition, governmental efforts should be made to increase physical activity opportunities in poor neighborhoods.
Hedwig LeeEmail:
  相似文献   
947.
A restrictive population policy led to almost doubling the number of newborns from one year to another in Romania in the 1960s. Twenty years later, this large generation (of women) enters a marriage market with few eligible older mates, in a society where marriage is a must. In this article, I analyze this social experiment within the broader frame of the marriage squeeze/two sex models. Using various data from censuses and surveys, I argue that the marriage market is flexible even when is confronted with disproportionately large cohorts. If the social pressure toward marriage is strong, the marriage rates do not necessarily fall, but the mating age patterns change.
Cristina BradatanEmail:
  相似文献   
948.
In this article, a new indicator designed to capture the multidimensionality of the social health of the French regions is put to the test. Drawing on regional data for 2004, this indicator of social health (ISH) sheds new light on the social performance of the French regions. The worst performers are the highly urbanised regions, whereas others, such as Limousin, turn out to perform well in social terms. Two or three regions remain stuck at the bottom of the table regardless of the indicator used. Nord-Pas-de-Calais and Languedoc-Roussillon, which bring up the rear in terms of gross disposable income (GDI) and gross domestic product (GDP) per capita, also record very mediocre scores for social health as measured by our ISH.
Florence Jany-CatriceEmail:
  相似文献   
949.
Partial Order Theory has been recently more and more employed in applied science to overcome the intrinsic disadvantage hidden in aggregation, if a multiple attribute system is available. Despite its numerous positive features, there are many practical cases where the interpretation of the partial order can be rather troublesome. In these cases the analysis of underlying dimensions could be useful to uncover particular data structures. The paper shows a way of addressing the problem with the help of an actual case study, which deals with European opinions on services of general interest. In particular, a partial order of countries is firstly provided and then a method to detect dimensions is discussed and applied. The analysis stems directly from the Partially Order Set (poset) and Lattice theory with particular references to dimension theory and Formal Concept Analysis. The study is eventually able to pinpoint role and relevance of different attributes characterizing EU countries which are used to define the partial order.
Rainer BrüggemannEmail:
  相似文献   
950.
Using data from the first two rounds of the European Social Survey, we examine the link between income, reference income and life satisfaction across Western Europe. We find that whilst there is a strong positive relationship between income and life satisfaction, reference or comparison income exerts a strong negative influence. Interestingly, our results confirm the importance of personal values and beliefs not only as predictors of subjective well-being, but also as mitigating factors in the relationship between income, reference income and life satisfaction. While our findings provide additional empirical support for the relative utility hypothesis, they are also consistent with Rojas’ (J Econ Psychol 28:1–14, 2007) Conceptual-Referent-Theory (CRT), which is based on the premise that the salience of income and comparison income depends on one’s intrinsic values and personal beliefs.
Yannis GeorgellisEmail:
  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