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   120篇
  免费   4篇
管理学   19篇
人口学   12篇
理论方法论   7篇
综合类   6篇
社会学   55篇
统计学   25篇
  2022年   1篇
  2020年   2篇
  2019年   3篇
  2018年   5篇
  2017年   1篇
  2016年   2篇
  2015年   3篇
  2014年   2篇
  2013年   21篇
  2012年   5篇
  2011年   1篇
  2010年   2篇
  2009年   6篇
  2008年   5篇
  2007年   2篇
  2006年   4篇
  2005年   2篇
  2004年   5篇
  2003年   3篇
  2002年   3篇
  2001年   8篇
  2000年   3篇
  1999年   2篇
  1998年   1篇
  1997年   4篇
  1996年   3篇
  1995年   3篇
  1994年   1篇
  1993年   5篇
  1992年   2篇
  1991年   1篇
  1989年   1篇
  1986年   2篇
  1985年   3篇
  1983年   2篇
  1982年   1篇
  1977年   1篇
  1975年   2篇
  1970年   1篇
排序方式: 共有124条查询结果,搜索用时 15 毫秒
41.
Social support is widely seen as an integral component for coping with the stresses of everyday life. While there are various sources and types of support potentially available to young people, it is perhaps less obvious the extent to which young people differentially experience these sources and types. Anecdotal evidence suggests that context, culture and other factors unique to local life shape the many dimensions of social support for youth. In this paper, we seek to examine this research need in more detail by focusing on a broad range of factors shaping youth social support and youth well‐being. Drawing on mixed methods research, we examine social support evidence for adolescents in Florida, USA, and Offaly, Ireland. Through this research, we investigate how the connection between social support and well‐being bears out in these two different socio‐cultural contexts; second, we seek to understand whether types and sources of social support differ among youth in both countries; and what relationship exists between well‐being and types and sources of support. Comparing similar measures of social support across two distinct societal contexts allows us to determine similarities and differences, while also providing suggestions for application that can shape future programmes and policy.  相似文献   
42.
Bivariate uniform distributions with dependent components are readily derived by distribution function transformations of the components of non-uniform dependent continuous bivariate random variables (X,Y). Contour plots of joint density functions show the various, and varying, forms of dependence which can arise from different distributional forms for (X,Y) and aids the choice of bivariate uniform distributions as empirical models.  相似文献   
43.
Based on the Conservation of Resources theory, we used data from the National Survey of Midlife Development in the United States (MIDUS I, 1995–1996; N=1779) to estimate by covariance structure analysis the direct and indirect effects of work and family demands, resources, and support on psychological distress. In a new application of the theory, we estimated six within-role mediational pathways linking work-related predictors to psychological distress through work interfering with family (WIF) and family-related predictors to psychological distress through family interfering with work (FIW). Finally, in a departure from previous work–family research, we estimated six cross-role mediational pathways linking work-related predictors to psychological distress through FIW and family-related predictors to psychological distress through WIF. Ten of the 12 hypothesized mediational effects were significant and another was marginally significant, supporting the mediational role of work–family conflict within Conservation of Resources theory.  相似文献   
44.
Two studies examined the role of various fault attributions and other factors in children's anticipated response to hypothetical peers described as having an undesirable characteristic. The children were found to distinguish among various fault attributions (i.e., general, onset, and perpetuation; study 1), and they tended to agree more strongly that the peers were responsible for the perpetuation than the onset of these characteristics (studies 1 and 2). In study 1, perceiving an aggressive or overweight peer as similar to a friend and believing that the overweight peer will overcome this undesirable characteristic were found to be associated with a relatively favorable response to these peers. The more strongly the children agreed that (1) an aggressive peer is generally at fault for his/her undesirable characteristic (study 1) and (2) peers who are aggressive, overweight, shy, or a poor student are at fault for the onset of their undesirable characteristics (study 2), the less favorably they anticipated responding to these peers. Unexpectedly, attributing responsibility to forces ‘outside the peer's control’ (i.e., parents and biology) for his/her undesirable characteristic in study 2 was not found to be associated with a relatively favorable response to any peer with an undesirable characteristic.  相似文献   
45.
We introduce a class of small scale simulation models—‘prototypes'—which reproduce many of the known properties of maximum likelihood and related reconstruction methods used in emission tomography, and greatly simplify the development of new methods. We introduce an iterative Fisher-scoring algorithm and demonstrate, by use of the prototype models, its superior speed of convergence when compared with the standard EM algorithm.  相似文献   
46.
Many medical and biological studies involve response in the form of Poisson counts which can bemodelled using explanatory variables which also arise from count data. If the explanatory variables are observable without error (also as Poisson counts) we have a generalized linear model with a logarithmic link function and Poisson error structure. If,however, some of the explanatory variables are not directly observable, but arise with superimposed errors (again of Poisson form), the model is of a new type:a generalised linear functional Poisson model. In this paper,maximum likelihood estimates of the parameters of this model are determined along with the information matrix which (on noting its particular patterned form) is amenable to inversion in explicit form. Methods are proposed of an iterative type for computing estimates of the parameters and of their variational properties (e.g. standard errors) for this model, which also has application in other fields such as road traffic studies.  相似文献   
47.
This study tested a possible explanatory framework of the coping and adaptation of 159 academically able seventh graders by exploring their strengths and vulnerabilities in coping with their differences, their peer relationship styles, and their patterns of achievement motivation. All of the youth in this sample scored in the 97th percentile on grade-level standardized tests with one fourth scoring at the mean of college-bound seniors on the SAT, an above-grade-level test for this age group. The range of responses included a bifurcated distribution pattern of strengths and vulnerabilities in values related to achievement motivation and normal distribution patterns in coping with self and academic ability and peer relationship style. The findings support use of structured self-reports in obtaining academically able youths' perspectives on self-in-context and as a supplement in psychosocial assessment.  相似文献   
48.
49.
Tang & Barnett (1996) present some techniques for monitoring and controlling the dispersion of multivariate normal processes based on subgroup data. The current paper compares the proposed techniques and various competing procedures. Simulation results indicate that the proposed techniques are superior to existing procedures.  相似文献   
50.
This article investigates the impact of immigrant generation on students performance in college calculus courses and examines the extent to which the observed patterns corroborate or contradict various assimilation theories. It goes beyond past studies of the relationship between immigrant generation and mathematics achievement that focused primarily on middle and high school students and typically excluded foreign students. Our principal finding is that foreign students and the 1.25 generation earned the highest grades, on average, even after controlling for race/ethnicity and socioeconomic status. Our findings provide partial support for the immigrant advantage theory.  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