全文获取类型
收费全文 | 222篇 |
免费 | 18篇 |
专业分类
管理学 | 23篇 |
民族学 | 1篇 |
人口学 | 15篇 |
理论方法论 | 36篇 |
综合类 | 1篇 |
社会学 | 137篇 |
统计学 | 27篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 16篇 |
2018年 | 10篇 |
2017年 | 16篇 |
2016年 | 17篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 46篇 |
2012年 | 10篇 |
2011年 | 13篇 |
2010年 | 8篇 |
2009年 | 6篇 |
2008年 | 11篇 |
2007年 | 8篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1997年 | 4篇 |
1996年 | 7篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1987年 | 1篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1974年 | 1篇 |
排序方式: 共有240条查询结果,搜索用时 375 毫秒
51.
52.
53.
We draw on Carl Rogers’ client‐centred therapy theory and the theoretical lens of positive work relationships to explain why and how positive regard can be a powerful source for the development of employees’ sense of vitality, job performance and organizational citizenship behaviours (OCBs). We theorize that when employees experience relationships characterized by a high level of regard with their co‐workers they are likely to develop a sense of vitality, which in turn results in enhanced job performance and OCBs. These relationships are examined in both experimental and field studies. The results of these multiple studies provide general support for the power of positive regard in augmenting a sense of vitality and enhancing both job performance and citizenship behaviours. 相似文献
54.
Online voting platforms have been introduced in some locations as the solution to the many barriers to political participation that disabled people continue to face. Reading the experiences of disabled student voters on university campuses alongside broader trends in electoral reform taking place in jurisdictions across Canada allows us to attend to the dangerous ways in which conversations around access have been limited through virtual solutions that encourage the physical absence of disabled voters. This article situates these absences alongside other categories of exclusion – including groups who are formally disenfranchised – and recalls many unstated values that are active in shaping citizenship cultures. Probing online voting through a critical disability angle, we present a critique of techno-fixes that builds upon broader notions of accessibility and inclusion. 相似文献
55.
An investigation into the two‐stage meta‐analytic copula modelling approach for evaluating time‐to‐event surrogate endpoints which comprise of one or more events of interest
下载免费PDF全文
![点击此处可从《Pharmaceutical statistics》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Clinical trials of experimental treatments must be designed with primary endpoints that directly measure clinical benefit for patients. In many disease areas, the recognised gold standard primary endpoint can take many years to mature, leading to challenges in the conduct and quality of clinical studies. There is increasing interest in using shorter‐term surrogate endpoints as substitutes for costly long‐term clinical trial endpoints; such surrogates need to be selected according to biological plausibility, as well as the ability to reliably predict the unobserved treatment effect on the long‐term endpoint. A number of statistical methods to evaluate this prediction have been proposed; this paper uses a simulation study to explore one such method in the context of time‐to‐event surrogates for a time‐to‐event true endpoint. This two‐stage meta‐analytic copula method has been extensively studied for time‐to‐event surrogate endpoints with one event of interest, but thus far has not been explored for the assessment of surrogates which have multiple events of interest, such as those incorporating information directly from the true clinical endpoint. We assess the sensitivity of the method to various factors including strength of association between endpoints, the quantity of data available, and the effect of censoring. In particular, we consider scenarios where there exist very little data on which to assess surrogacy. Results show that the two‐stage meta‐analytic copula method performs well under certain circumstances and could be considered useful in practice, but demonstrates limitations that may prevent universal use. 相似文献
56.
Marie Hukov Natalie Neumeyer Tobias Niebuhr Leonie Selk 《Scandinavian Journal of Statistics》2019,46(1):26-58
In this paper, an autoregressive time series model with conditional heteroscedasticity is considered, where both conditional mean and conditional variance function are modeled nonparametrically. Tests for the model assumption of independence of innovations from past time series values are suggested. Tests based on weighted L2‐distances of empirical characteristic functions are considered as well as a Cramér–von Mises‐type test. The asymptotic distributions under the null hypothesis of independence are derived, and the consistency against fixed alternatives is shown. A smooth autoregressive residual bootstrap procedure is suggested, and its performance is shown in a simulation study. 相似文献
57.
Sixty-one foster parents from a central Canadian province participated in a telephone interview that included the question: “What are the benefits of fostering children who have the same values, beliefs and traditions as you?” A total of 51 unique responses were obtained and grouped together by 13 foster parents. Multidimensional scaling and cluster analysis were used to analyze the grouping data. Foster parents described five themes: expand on held values, child feels secure, smooth transitions, low stress and more in common. There were similarities and differences between the perspectives of foster parents interviewed and the literature. Implications for future research are discussed. 相似文献
58.
U. Hassler 《Statistical Papers》1993,34(1):67-82
In Monte Carlo sudies we investigate unit root tests in line with Dickey/Fuller (1979). In case of positively autocorrelated
MA(1) residuals their experimental power is extremely poor. Next we compare different versions of periodogram regression suggested
in the literature. Their experimental behaviour is investigated with fractionally integrated processes. It is demonstrated
how unit root tests may be based on periodogram regression. There is simulation evidence that those tests may do better in
terms of power than the autoregressive tests, especially when testing ARMA(1,1) series against a linear time trend. 相似文献
59.
60.
Natalie L. Hill 《Child and Adolescent Social Work Journal》2008,25(6):451-467
Substance use prevention programs empowering individual adolescents to resist substance use through education and skills training
are crucial to reducing substance use within this population. However, existing programs of this type are designed primarily
for classroom use, and may not meet the needs of social workers intervening with adolescents outside classroom settings. A
literature review identified six programs that have demonstrated statistically significant reductions in substance use when
implemented outside the classroom. The current study describes these programs, identifies their common characteristics, and
draws on additional prevention research to outline recommendations for practitioners seeking to apply the field’s most current
knowledge base in community settings. 相似文献