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   295633篇
  免费   11836篇
  国内免费   2559篇
管理学   30252篇
劳动科学   171篇
民族学   3244篇
人才学   70篇
人口学   14013篇
丛书文集   22716篇
理论方法论   18787篇
综合类   135461篇
社会学   57427篇
统计学   27887篇
  2024年   656篇
  2023年   2385篇
  2022年   5215篇
  2021年   6806篇
  2020年   6388篇
  2019年   6217篇
  2018年   6893篇
  2017年   9114篇
  2016年   6989篇
  2015年   7326篇
  2014年   11316篇
  2013年   27345篇
  2012年   16529篇
  2011年   18493篇
  2010年   18389篇
  2009年   18539篇
  2008年   19160篇
  2007年   19439篇
  2006年   18339篇
  2005年   16030篇
  2004年   11427篇
  2003年   8139篇
  2002年   8457篇
  2001年   7619篇
  2000年   4776篇
  1999年   3030篇
  1998年   2121篇
  1997年   1826篇
  1996年   1693篇
  1995年   1509篇
  1994年   1427篇
  1993年   1182篇
  1992年   1230篇
  1991年   1120篇
  1990年   1084篇
  1989年   922篇
  1988年   901篇
  1987年   810篇
  1986年   753篇
  1985年   838篇
  1984年   829篇
  1983年   780篇
  1982年   666篇
  1981年   607篇
  1980年   530篇
  1979年   579篇
  1978年   509篇
  1977年   426篇
  1976年   421篇
  1975年   389篇
排序方式: 共有10000条查询结果,搜索用时 390 毫秒
991.
This article defines and describes the Calgary Family Intervention Model (CFIM). CFIM is an organizing framework conceptualizing the intersect between a particular domain (i.e., cognitive, affective, or behavioral) of family functioning and a specific intervention offered by a health professional. Examples and discussion of interventions such as storying the illness experience, encouraging respite, and asking interventive questions are presented. CFIM is one way that health professionals can conceptualize about change.  相似文献   
992.
Abstract This paper examines rural/urban differences and trends in mental health during the farm crisis of the 1980s in a large panel sample from a midwestern state. A community research perspective, which attributes differences to life styles, culture, and community context, is contrasted with an economic stress perspective, which focuses on individual differences in economic circumstances as determinants of rural-urban differences in mental health. Survey samples from 1981, 1986, and 1989 are used to examine differences among seven categories of community type. Multiple regression analysis of the trend and panel data provide support for both the individual economic distress and community context models.  相似文献   
993.
Efficient contracts set incentives through the assignment of rights and profit shares., Although efficient contracts have been used to explain the nature of the firm, the use of contractual rights in specific business contracts is relatively unexplored. We analyze contractual rights in franchise systems, in particular the right to add franchisees. An exclusive territory assigned to an initial franchisee is not an immutable guarantee, but rather a starting point for subsequent renegotiation in the franchise relationship. Exclusivity is therefore profitable when franchisee efforts are critical to the venture. A sample of franchise contracts reveals evidence consistent with the model's prediction.  相似文献   
994.
995.
996.
997.
In this article, we conduct a textual analysis of Edith Wharton's 1911 novel, Ethan Frome . We offer three readings. The first presents Wharton's account of illness through a framework developed foru decades later by Talcott Parsons. Wharton's sick role was less medico-centric than Parsons; it emphasized the importance of class, gender and community in defining and legitimizing the sick role. Our second reading explores the socially constructed nature of roles in illness. The sick role as portrayed by Wharton is not the social fact later conceived by Parsons, but a social construct with no determinate reference beyond that which the local community is willing to grant it. Our third reading examines the social context, particularly the power relations, within which this story of illness has been constructed.  相似文献   
998.
999.
1000.
Many studies have provided evidence that, in birds, inexperienced breeders have a lower probability of breeding successfully. This is often explained by lack of skills and knowledge, and sometimes late laying dates in the first breeding attempt. There is growing evidence that in many species with deferred reproduction, some prebreeders attend breeding places, acquire territories and form pairs. Several behavioural tactics assumed to be associated with territory acquisition have been described in different species. These tactics may influence the probability of recruiting in the breeding segment of the population, age of first breeding, and reproductive success in the first breeding attempt. Here we addressed the influence of behaviour ('squatting') during the prebreeding period on demographic parameters (survival and recruitment probability) in a long-lived colonial seabird species: the kittiwake. We also investigated the influence of behaviour on reproductive trajectory. Squatters have a higher survival and recruitment probability, and a higher probability of breeding successfully in the first breeding attempt in all age-classes where this category is represented. The influence of behaviour is mainly expressed in the first reproduction. However, there is a relationship between breeding success in the first occasion and subsequent occasions. The influence of breeding success in the first breeding attempt on the rest of the trajectory may indirectly reflect the influence of behaviour on breeding success in the first occasion. The shape of the reproductive trajectory is influenced by behaviour and age of first breeding. There is substantial individual variation from the mean reproductive trajectory, which is accounted for by heterogeneity in performance among individuals in the first attempt, but there is no evidence of individual heterogeneity in the rate of change over time in performance in subsequent breeding occasions  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