全文获取类型
收费全文 | 7905篇 |
免费 | 158篇 |
专业分类
管理学 | 1187篇 |
民族学 | 27篇 |
人口学 | 765篇 |
丛书文集 | 26篇 |
理论方法论 | 592篇 |
综合类 | 105篇 |
社会学 | 3371篇 |
统计学 | 1990篇 |
出版年
2020年 | 117篇 |
2019年 | 151篇 |
2018年 | 217篇 |
2017年 | 272篇 |
2016年 | 189篇 |
2015年 | 131篇 |
2014年 | 190篇 |
2013年 | 1316篇 |
2012年 | 258篇 |
2011年 | 241篇 |
2010年 | 178篇 |
2009年 | 170篇 |
2008年 | 145篇 |
2007年 | 183篇 |
2006年 | 160篇 |
2005年 | 161篇 |
2004年 | 146篇 |
2003年 | 143篇 |
2002年 | 149篇 |
2001年 | 197篇 |
2000年 | 189篇 |
1999年 | 172篇 |
1998年 | 129篇 |
1997年 | 126篇 |
1996年 | 126篇 |
1995年 | 106篇 |
1994年 | 104篇 |
1993年 | 97篇 |
1992年 | 140篇 |
1991年 | 119篇 |
1990年 | 116篇 |
1989年 | 111篇 |
1988年 | 96篇 |
1987年 | 90篇 |
1986年 | 95篇 |
1985年 | 107篇 |
1984年 | 112篇 |
1983年 | 123篇 |
1982年 | 98篇 |
1981年 | 88篇 |
1980年 | 85篇 |
1979年 | 94篇 |
1978年 | 90篇 |
1977年 | 80篇 |
1976年 | 67篇 |
1975年 | 67篇 |
1974年 | 58篇 |
1973年 | 58篇 |
1972年 | 41篇 |
1971年 | 49篇 |
排序方式: 共有8063条查询结果,搜索用时 93 毫秒
181.
Robert G. Staudte 《统计学通讯:理论与方法》2017,46(7):3148-3163
Insight into measures of peakedness, heavy-tailedness, and kurtosis can be gained by studying Ruppert’s ratios of interquantile ranges. They are not only monotone in Horn’s measure of peakedness when applied to the central portion of the population, but also monotone in the practical tail-index of Morgenthaler and Tukey, when applied to the tails. Non-parametric confidence intervals are found for Ruppert’s ratios, and sample sizes required to obtain such intervals for a pre-specified relative width and level are provided. In addition, the empirical power of distribution-free tests for peakedness and bimodality are found for some symmetric distributions. 相似文献
182.
Rachel G. Lucas‐Thompson 《Journal of research on adolescence》2012,22(4):704-721
The goal of this study was to explore theoretically suggested but untested links between interparental conflict and stress physiology in late adolescence. A multi‐method study was conducted involving families (n = 42) who previously participated in the University California, Irvine site of the NICHD Study of Early Child Care and Youth Development; adolescents were 17½ years of age on average. Parent report and observer ratings of conflict, adolescent participation in a robust social‐evaluative stressor, and assessment of cortisol, cardiovascular, and emotional functioning were included. Marital conflict was associated with dampened physiological stress responses in adolescence but sensitized emotional responses, suggesting that conflict may be associated with problems integrating and coordinating emotional and physiological responses to stress. 相似文献
183.
Kimberley Kolb Ayre Colleen A. Caldwell Jonah Stinson Wayne G. Landis 《Risk analysis》2014,34(9):1589-1605
Introduction and spread of the parasite Myxobolus cerebralis, the causative agent of whirling disease, has contributed to the collapse of wild trout populations throughout the intermountain west. Of concern is the risk the disease may have on conservation and recovery of native cutthroat trout. We employed a Bayesian belief network to assess probability of whirling disease in Colorado River and Rio Grande cutthroat trout (Oncorhynchus clarkii pleuriticus and Oncorhynchus clarkii virginalis, respectively) within their current ranges in the southwest United States. Available habitat (as defined by gradient and elevation) for intermediate oligochaete worm host, Tubifex tubifex, exerted the greatest influence on the likelihood of infection, yet prevalence of stream barriers also affected the risk outcome. Management areas that had the highest likelihood of infected Colorado River cutthroat trout were in the eastern portion of their range, although the probability of infection was highest for populations in the southern, San Juan subbasin. Rio Grande cutthroat trout had a relatively low likelihood of infection, with populations in the southernmost Pecos management area predicted to be at greatest risk. The Bayesian risk assessment model predicted the likelihood of whirling disease infection from its principal transmission vector, fish movement, and suggested that barriers may be effective in reducing risk of exposure to native trout populations. Data gaps, especially with regard to location of spawning, highlighted the importance in developing monitoring plans that support future risk assessments and adaptive management for subspecies of cutthroat trout. 相似文献
184.
Stephanie G. Schartel Dunn Gwendelyn S. Nisbett 《Atlantic journal of communication》2017,25(3):197-206
Fandom and psychological reactance theory, a framework for understanding reactions to messages perceived to limit an individual’s freedom to choose freely, are used to examine the influence of sports celebrities. An experiment was conducted (n = 283) to examine the impact of source similarity and controlling language use on reactance levels and message evaluations. Findings suggest that sources perceived to be similar generated less reactance than dissimilar sources. Similar source messages were also linked to greater potential for information-seeking behavior. High- versus low-controlling language use was examined in conjunction with similarity; low-controlling language was found to generate the least reactance regardless of source similarity. Implications for the use of celebrity advocacy in marketing and public relations are discussed. 相似文献
185.
186.
J. J. Roest G. H. P. Van der Helm G. J. J. M. Stams 《Child and Adolescent Social Work Journal》2016,33(5):455-468
This study investigated the longitudinal relation between therapeutic alliance and treatment motivation in a sample of 174 adolescents receiving residential treatment in the Netherlands. Structural equation modeling with a cross-lagged panel design was used to examine the relation between therapeutic alliance and treatment motivation up to 9 months of treatment. Results revealed that autoregressive associations between initial therapeutic alliance and alliance at subsequent time points were significant, whereas for treatment motivation a significant association was found after 6 months, but not after 9 months. Results also showed that a higher level of therapeutic alliance after 3 months was predictive of a higher level of treatment motivation after 6 months. Furthermore, a higher level of therapeutic alliance after 6 months was predictive of a higher level of treatment motivation after 9 months. Implications for research and clinical practice are discussed. 相似文献
187.
Hans Skott-Myhre Brad McDonald Kathleen S. G. Skott-Myhre 《Journal of Progressive Human Services》2017,28(3):164-178
In this article, we trace the rise of neoliberalism and its impacts on the historical role of human services within the academy and the community. We ask whether we can re-think and re-envision a 21st century academy rooted in the material actualities of daily living and connected in very real ways to the struggles of those Human Services was designed to serve. Finally, we propose that Human Services could have a significant role to play in developing new modes of value that could lead to new modes of thought and new avenues of praxis. 相似文献
188.
To understand outcomes for Pacific peoples in New Zealand we need to further our psychological knowledge of the relationship between Pacific identity and wellbeing. We map the hierarchical organization of Pacific identity and wellbeing using a novel top-down factor analytic approach applied to the Pacific Identity and Wellbeing Scale (PIWBS; N = 586). Analyses indicated that Pacific identity experiences were organized within two broad dimensions reflecting Identity Engagement and Cultural Wellbeing. Critically, our analysis showed that Religious Centrality and Embeddedness emerged jointly from these dual broad domains. Religious identification provides a bridging link between identity and wellbeing for Pacific peoples. Identifying the relationships of Pacific identity and wellbeing factors, and how religious identification emerges jointly from these two broad domains, provides valuable information in how the Pacific self may be cognitively organized and may assist in future research directions in this area. We assert that this general statistical model provides broad conceptual insights into how Pacific peoples experience their identity and culture, and how this relates to various social indicators of health and wellbeing at a broad, theoretical level. In particular, we offer a conceptual analysis of possible insights from our hierarchical model of identity and wellbeing for understanding Pacific suicide in New Zealand. 相似文献
189.
Richard G. Spencer Benjamin D. Cortese Vanessa A. Lukas Nancy Pleshko 《The American statistician》2017,71(1):81-87
In a wide variety of biomedical and clinical research studies, sample statistics from diagnostic marker measurements are presented as a means of distinguishing between two populations, such as with and without disease. Intuitively, a larger difference between the mean values of a marker for the two populations, and a smaller spread of values within each population, should lead to more reliable classification rules based on this marker. We formalize this intuitive notion by deriving practical, new, closed-form expressions for the sensitivity and specificity of three different discriminant tests defined in terms of the sample means and standard deviations of diagnostic marker measurements. The three discriminant tests evaluated are based, respectively, on the Euclidean distance and the Mahalanobis distance between means, and a likelihood ratio analysis. Expressions for the effects of measurement error are also presented. Our final expressions assume that the diagnostic markers follow independent normal distributions for the two populations, although it will be clear that other known distributions may be similarly analyzed. We then discuss applications drawn from the medical literature, although the formalism is clearly not restricted to that application. 相似文献
190.