全文获取类型
收费全文 | 660篇 |
免费 | 18篇 |
专业分类
管理学 | 50篇 |
民族学 | 7篇 |
人口学 | 41篇 |
理论方法论 | 101篇 |
综合类 | 1篇 |
社会学 | 406篇 |
统计学 | 72篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 18篇 |
2019年 | 23篇 |
2018年 | 27篇 |
2017年 | 33篇 |
2016年 | 29篇 |
2015年 | 17篇 |
2014年 | 20篇 |
2013年 | 126篇 |
2012年 | 21篇 |
2011年 | 24篇 |
2010年 | 8篇 |
2009年 | 9篇 |
2008年 | 16篇 |
2007年 | 19篇 |
2006年 | 15篇 |
2005年 | 11篇 |
2004年 | 26篇 |
2003年 | 7篇 |
2002年 | 15篇 |
2001年 | 14篇 |
2000年 | 11篇 |
1999年 | 14篇 |
1998年 | 16篇 |
1997年 | 9篇 |
1996年 | 11篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 6篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 4篇 |
1989年 | 9篇 |
1988年 | 8篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1978年 | 8篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1973年 | 4篇 |
1969年 | 3篇 |
1966年 | 3篇 |
排序方式: 共有678条查询结果,搜索用时 15 毫秒
71.
In robust parameter design, variance effects and mean effects in a factorial experiment are modelled simultaneously. If variance effects are present in a model, correlations are induced among the naive estimators of the mean effects. A simple normal quantile plot of the mean effects may be misleading because the mean effects are no longer iid under the null hypothesis that they are zero. Adjusted quantiles are computed for the case when one variance effect is significant and examples of 8-run and 16-run fractional factorial designs are examined in detail. We find that the usual normal quantiles are similar to adjusted quantiles for all but the largest and smallest ordered effects for which they are conservative. Graphically, the qualitative difference between the two sets of quantiles is negligible (even in the presence of large variance effects) and we conclude that normal probability plots are robust in the presence of variance effects. 相似文献
72.
73.
74.
Polynomial spline regression models of low degree have proved useful in modeling responses from designed experiments in science and engineering when simple polynomial models are inadequate. Where there is uncertainty in the number and location of the knots, or breakpoints, of the spline, then designs that minimize the systematic errors resulting from model misspecification may be appropriate. This paper gives a method for constructing such all‐bias designs for a single variable spline when the distinct knots in the assumed and true models come from some specified set. A class of designs is defined in terms of the inter‐knot intervals and sufficient conditions are obtained for a design within this class to be all‐bias under linear, quadratic and cubic spline models. An example of the construction of all‐bias designs is given. 相似文献
75.
This paper considers the effects of the presence of eqmi-correlation between observations in a k-way factorial experiment, A technique to provide unbiased F-tests is also constructed. 相似文献
76.
This article studies optimal taxation in a general equilibrium macroeconomic model with endogenous entry. We compare the constant elasticity of substitution (CES) model to three alternative demand structures: oligopolistic competition in prices, oligopolistic competition in quantities, and translog preferences. Our economy is characterized by two distortions: a labor distortion due to the misalignment of markups on goods and leisure, and an entry distortion due to the misalignment of the consumer surplus effect and the profit destruction effect of entry. The two distortions interact in determining the wedge between the market‐driven and optimal level of product diversity. We show how optimal labor and entry taxes depend on the prevailing demand structure, the nature and size of entry costs, and the degree of substitutability between goods. (JEL E22, E61, E62) 相似文献
77.
Dara Seybold Byron Calhoun Denise Burgess Tammi Lewis Kelly Gilbert Angie Casto 《Journal of social work practice in the addictions》2014,14(3):239-249
The objective of this article is not to present a scientific or systematic study, but to provide an initial framework for designing a training workshop to enhance health practitioners’ (nurses, social workers, physicians, etc.) knowledge regarding substance abuse treatment and to decrease their bias toward substance-abusing women, particularly pregnant women in rural communities. We incorporated the 4 Transdisciplinary Foundations from the Substance Abuse and Mental Health Services Administration Competencies Model, with specific competencies targeted that related to provider bias. After the conference, 52 of the 70 participants completed a questionnaire to self-assess knowledge level and confidence in skill related to substance abuse management. Participant mean scores were statistically significantly higher following the conference than 1 week prior (p < .001) in the area of “gender difference with substance abuse,” moving from an average of 2.6 to 4.5 on a 5-point Likert scale. Our conference was successful in increasing attendees’ knowledge about gender difference and substance abuse among pregnant patients. 相似文献
78.
Carol Lewis 《Social Work Education》2013,32(6):577-587
This paper examines the needs of new and future social work researchers in the light of the overall aims of this particular project. The author is an aspiring ‘new’ researcher and will examine her own personal experience, to date, of being part of a postgraduate research programme in order to clarify how we might best ensure that the next generation of researchers can contribute to the strategy which is being developed. The paper reviews the author's experience of research training to test its adequacy in preparing the next generation to meet the demands required and in consideration of current professional develop ments around social work and social care. The paper will also consider who will be the members of this next generation and how the future agenda for the profession might potentially contribute to the development of a sound professional knowledge base and also influence the wider social science debate. The conclusions of this paper will draw together a number of key issues that have been highlighted so far and give a perspective on these which links values, knowledge and skills in ways which might usefully promote further debate and constructive resolution. 相似文献
79.
Basic characteristics of an assemble-to-order environment make effective master scheduling extremely difficult. Limited resource capacities and dynamic customer end-item demand contribute to the complexity of the master production scheduling problem. To gain flexibility and responsiveness within this system, the master production schedule (MPS) focuses at the component level. This research proposes a master scheduling technique for manufactured components which combines a multiobjective capacitated multi-item/multi-stage lot-sizing model with an interactive multiple objective optimization solution procedure. To evaluate the model's performance as a realistic and practical master scheduling tool, this study focuses on the National Cash Register (NCR) electronics manufacturing facility in Columbia, South Carolina. 相似文献
80.
Lucy Resnyansky 《Journal of ethnic and migration studies》2016,42(12):2049-2066
Population mobility, globalisation, and the Internet contribute to the change of immigration patterns and the emergence of new kinds of identities and integration strategies. It is necessary to re-examine the heuristic significance of this field's key concepts in order to ensure that relevant and theoretically sound knowledge consistently informs integration policies, measures, and programmes. This paper focuses on the concepts of language and maintains that a narrow-utilitarian approach to the issue of language and integration may thrive due to uncritical acceptance of an instrumentalist view on language as a means of communication and/or a social marker together with an essentialist concept of identity that stems from the sociolinguistic tradition. However, this conceptual framework does not correspond to the complexity of the integration process in a contemporary society. The present paper aims to contribute to the field of language and immigrant integration via outlining an alternative approach to language grounded in the ideas of Humboldt, Potebnja, and Vygotsky (language as a creative force, a worldview, and a mediating tool) and discussing its potential for addressing the issue of integration in contemporary conditions. 相似文献