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   4783篇
  免费   190篇
管理学   705篇
民族学   33篇
人才学   1篇
人口学   442篇
丛书文集   38篇
理论方法论   503篇
综合类   41篇
社会学   2589篇
统计学   621篇
  2023年   30篇
  2022年   23篇
  2021年   40篇
  2020年   93篇
  2019年   124篇
  2018年   148篇
  2017年   203篇
  2016年   178篇
  2015年   123篇
  2014年   141篇
  2013年   764篇
  2012年   187篇
  2011年   180篇
  2010年   120篇
  2009年   144篇
  2008年   144篇
  2007年   128篇
  2006年   136篇
  2005年   136篇
  2004年   144篇
  2003年   127篇
  2002年   131篇
  2001年   126篇
  2000年   108篇
  1999年   85篇
  1998年   70篇
  1997年   64篇
  1996年   80篇
  1995年   57篇
  1994年   58篇
  1993年   73篇
  1992年   63篇
  1991年   65篇
  1990年   54篇
  1989年   37篇
  1988年   41篇
  1987年   36篇
  1986年   36篇
  1985年   48篇
  1984年   52篇
  1983年   38篇
  1982年   46篇
  1981年   28篇
  1980年   36篇
  1979年   33篇
  1978年   21篇
  1977年   33篇
  1976年   22篇
  1975年   24篇
  1974年   26篇
排序方式: 共有4973条查询结果,搜索用时 456 毫秒
181.
This article uses privileged families who hire Independent Educational Consultants (IECs) as an instance to examine how privileged parents collaborate with individuals whom they consider educational experts to support their children in the college race. We argue that advantaged parents' anxieties about their children have created a market for IECs who provide expert advice in order to mitigate the uncertainties that these parents experience and to manage various goals that they want to achieve at an important turning point in their children's lives. Drawing primarily on interviews with parents who work with IECs, we introduce the concept of “collaborative cultivation” to analyze the processes whereby advantaged parents rely on the expertise and expert status of private counselors to cope with their and their children's vulnerability in the college race while at the same time preparing their children for the unknown future. The parental method of “concerted cultivation” reveals how elite parents rely on individuals they perceive as experts to establish “bridges” between their own social worlds and the academic worlds that appear to beyond their control. This bridging labor points to the myriad cultural beliefs enacted to justify the child‐rearing goals that privileged parents wish to accomplish by working with IECs.  相似文献   
182.
Abstract

This article investigates the development and application of key performance indicators for global product development. Two in-depth, longitudinal case studies with multinational Danish manufacturing companies were conducted, and highlight how key performance indicators, typically used for collocated, cross-functional product development, do not provide the predictive insight required to avoid the additional risks encountered in the global product development environment. Grounded in the case study results and building on established methodologies in performance measurement literature, a framework was developed and validated in two additional Danish companies to support project managers to develop: preventive indicators, which support the avoidance of identified risks, and outcome indicators, which support the measurement towards the attainment of project objectives. The study is unique as it is one of the very few longitudinal studies of engineering design activities in a global context, providing the in-depth contextual understanding towards key risks and their influence on performance; an important step to support researchers and practitioners with the development of preventive measures.  相似文献   
183.
Employees' expected contributions can be incongruent with those of their leader. We examine the congruence effect of leaders' and employees' expected contributions on job satisfaction. Results of cross-level polynomial regressions on 947 employees and 224 leaders support the congruence effect. When expected contributions are congruent, employees are more satisfied with their job. Our findings suggest that employees enjoy high challenges, as long as these challenges are in harmony with the expected contributions of their leaders. Employees are less satisfied with their jobs both when their expected contributions were higher than their leaders' and when their expected contributions were lower than those of their leaders. Beyond the relevance of having high expected contributions, the findings highlight the crucial role played by the congruence of expected contributions of leaders and employees.  相似文献   
184.
This paper critically scrutinizes the key success factors and tools described in the partnering literature by exploring how they are implemented in a public–private partnering collaboration. In addition to this the paper investigates to what extent these tools facilitate the relationship between the parties in a partnering process. The empirical data consist of two longitudinal case studies. Both cases are large and complex urban development projects in the Swedish water and sewage industry. The results from the cases were ambiguous and positive; as well, some negative outcomes were present. Further, the processes were in both cases far from easy and it required a lot of effort from the parties in the collaboration to make the collaboration work and establish a culture based on trust, especially higher up in the organization. As could be expected, the reality is thus far more complex and cumbersome than previous studies indicate.  相似文献   
185.
This study examines the relationship between premarital childbearing and the timing of women's entry into their first marriage in sub‐Saharan Africa. The study shows that African women who have a premarital birth generally experience later transitions to marriage than do their childless peers. Although the birth of a child precipitates a quicker transition to marriage initially, unmarried mothers, on average, marry at older ages than their childless peers and remain single for between 2 and 14 years. Evidence from a subsample of countries confirms that the time between having a child and first marriage has lengthened slightly in some countries; however, this reflects mainly the overall trend toward later marriage, rather than a further bifurcation of the marital trajectories of mothers versus childless women. The study raises policy concerns about the welfare of Africa's single mothers and their children.  相似文献   
186.
The purpose of this exploratory study was to expand upon previous literatures in public relations power, and fill the need for more scholarship regarding practitioners’ perceptions of social media work, power, and gender. Findings from a survey of PRSA members showed that there is a gendered difference in power perception between males and females regardless of their PR roles or level of experience, but social media expertise was perceived equally between both genders. We argue that while social media expertise may serve to reduce a gendered power divide in public relations, continued critical exploration of social media and gender inequality is necessary.  相似文献   
187.
Youth experience increased surveillance by and involuntary contact with police officers compared with other age groups. Studies that explore the experiences of youth during these encounters are scant and focus on youth with criminal histories. This research aims to explore the experiences of college-attending youth between 18 and 24 years old in two southern states. The study was designed and conducted according to the tenets of interpretative phenomenological analysis (IPA). Twelve Black youth were recruited and interviewed between April 2015 and April 2016. Three superordinate themes (and subthemes) were identified: (1) negative feelings towards the police; (2) precarity of police encounters (subthemes: police as a threat to welfare; it could be me; steps to follow during police encounters; behavior is irrelevant) and; (3) police response is part of structural racism (subthemes: racism is everywhere; media contributes to racism). The importance of these findings for social work practice and research will be discussed.  相似文献   
188.
Various approaches to personalisation are well-established in the UK social care sector and are now starting to ‘travel’ to other sectors. In this paper we report findings from an evaluation of a pilot to test elements of personalisation in the management of offenders in probation services within the English criminal justice system. Following a review of evidence from social care, three different approaches to personalised-practice were developed and tested on a small-scale in three separate sites. The evaluation finds that all three approaches were implemented reasonably successfully, but challenges were identified including that personalised approaches are more time-consuming, that staff need support to exercise professional discretion and that balancing greater choice with managing criminogenic risk requires new ways of conceptualising the relationship between case manager and service user. Overall, ‘deeper’ approaches to personalisation, such as co-production, will take time to emerge. This paper makes two important contributions to the debate on personalisation in public services. First, it addresses the question of how transferable the concept of personalisation is from the social care sector to other sectors in the UK, in this case the criminal justice system. Secondly, it outlines a methodology for developing and evaluating personalisation pilots, prior to a wider roll-out.  相似文献   
189.
On pseudo-values for regression analysis in competing risks models   总被引:2,自引:2,他引:0  
For regression on state and transition probabilities in multi-state models Andersen et al. (Biometrika 90:15–27, 2003) propose a technique based on jackknife pseudo-values. In this article we analyze the pseudo-values suggested for competing risks models and prove some conjectures regarding their asymptotics (Klein and Andersen, Biometrics 61:223–229, 2005). The key is a second order von Mises expansion of the Aalen-Johansen estimator which yields an appropriate representation of the pseudo-values. The method is illustrated with data from a clinical study on total joint replacement. In the application we consider for comparison the estimates obtained with the Fine and Gray approach (J Am Stat Assoc 94:496–509, 1999) and also time-dependent solutions of pseudo-value regression equations.  相似文献   
190.
This paper considers estimation and prediction in the Aalen additive hazards model in the case where the covariate vector is high-dimensional such as gene expression measurements. Some form of dimension reduction of the covariate space is needed to obtain useful statistical analyses. We study the partial least squares regression method. It turns out that it is naturally adapted to this setting via the so-called Krylov sequence. The resulting PLS estimator is shown to be consistent provided that the number of terms included is taken to be equal to the number of relevant components in the regression model. A standard PLS algorithm can also be constructed, but it turns out that the resulting predictor can only be related to the original covariates via time-dependent coefficients. The methods are applied to a breast cancer data set with gene expression recordings and to the well known primary biliary cirrhosis clinical data.  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