全文获取类型
收费全文 | 994篇 |
免费 | 47篇 |
专业分类
管理学 | 153篇 |
民族学 | 16篇 |
人口学 | 109篇 |
理论方法论 | 94篇 |
综合类 | 16篇 |
社会学 | 469篇 |
统计学 | 184篇 |
出版年
2023年 | 24篇 |
2022年 | 7篇 |
2021年 | 6篇 |
2020年 | 32篇 |
2019年 | 38篇 |
2018年 | 55篇 |
2017年 | 84篇 |
2016年 | 61篇 |
2015年 | 48篇 |
2014年 | 54篇 |
2013年 | 192篇 |
2012年 | 51篇 |
2011年 | 43篇 |
2010年 | 49篇 |
2009年 | 30篇 |
2008年 | 35篇 |
2007年 | 20篇 |
2006年 | 31篇 |
2005年 | 22篇 |
2004年 | 10篇 |
2003年 | 10篇 |
2002年 | 9篇 |
2001年 | 10篇 |
2000年 | 17篇 |
1999年 | 9篇 |
1998年 | 10篇 |
1997年 | 10篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 3篇 |
1985年 | 3篇 |
1984年 | 4篇 |
1983年 | 1篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有1041条查询结果,搜索用时 78 毫秒
231.
232.
Agnes Leu Marianne Frech Hannah Wepf Joe Sempik Stephen Joseph Laura Helbling Urs Moser Saul Becker Corinna Jung 《Children & Society》2019,33(1):53-67
An online survey of children in school grades 4–9 (mostly aged 10–15) was conducted in order to determine the prevalence of young carers in Switzerland using a 2‐stage stratified sampling approach. 4082 respondents were drawn from 230 schools. A total of 3991 respondents were included in the analysis and of these 307 (7.7%) were identified as young carers. The population estimate of prevalence was 7.9 per cent. This suggests that there are around 38 400 young carers in school grades 4–9 in Switzerland. Extrapolating to the 9–16 age group gives a figure of almost 51 500. 相似文献
233.
234.
The growth rate of the gross domestic product (GDP) usually carries heteroscedasticity, asymmetry and fat-tails. In this study three important and significantly heteroscedastic GDP series are examined. A Normal, normal-mixture, normal-asymmetric Laplace distribution and a Student's t-Asymmetric Laplace (TAL) distribution mixture are considered for distributional fit comparison of GDP growth series after removing heteroscedasticity. The parameters of the distributions have been estimated using maximum likelihood method. Based on the results of different accuracy measures, goodness-of-fit tests and plots, we find out that in the case of asymmetric, heteroscedastic and highly leptokurtic data the TAL-distribution fits better than the alternatives. In the case of asymmetric, heteroscedastic but less leptokurtic data the NM fit is superior. Furthermore, a simulation study has been carried out to obtain standard errors for the estimated parameters. The results of this study might be used in e.g. density forecasting of GDP growth series or to compare different economies. 相似文献
235.
Marie‐Josée J. Mangen Michael B. Batz Annemarie Käsbohrer Tine Hald J. Glenn Morris Jr. Michael Taylor Arie H. Havelaar 《Risk analysis》2010,30(5):782-797
To address the persistent problems of foodborne and zoonotic disease, public health officials worldwide face difficult choices about how to best allocate limited resources and target interventions to reduce morbidity and mortality. Data‐driven approaches to informing these decisions have been developed in a number of countries. Integrated comparative frameworks generally share three methodological components: estimating incidence of acute illnesses, chronic sequelae, and mortality; attributing pathogen‐specific illnesses to foods; and calculating integrated measures of disease burden such as cost of illness, willingness to pay, and health‐adjusted life years (HALYs). To discuss the similarities and differences in these approaches, to seek consensus on principles, and to improve international collaboration, the E.U. MED‐VET‐NET and the U.S.‐based Food Safety Research Consortium organized an international conference convened in Berlin, Germany, on July 19–21, 2006. This article draws in part on the deliberations of the conference and discusses general principles, data needs, methodological issues and challenges, and future research needs pertinent to objective data‐driven analyses and their potential use for priority setting of foodborne and zoonotic pathogens in public health policy. 相似文献
236.
Drawing on qualitative interviews with drug addicts in Copenhagen, Denmark, this article offers a phenomenological reading of a methadone maintenance program. The program is set within the principles of harm reduction, meaning that its aim is not to cure the participants’ addiction but to keep them stable on substitution medicine and slow the deterioration of their lives. We analyze the program’s implications for participants’ sense of agency and constraint and for their orientations toward the past, present, and future. A major concern is with the program as a last resort policy that challenges neoliberal ideals of self‐governance and self‐development. While the program increases the participants’ sense of stability by providing them with methadone and by allowing them to better address their economic, housing, and other needs of everyday life, it also represents a context of physical, emotional, and social dependence. The interviews cast the program as a paradox that simultaneously increases participants’ sense of stability and vulnerability. In essence, the Danish methadone program has the effect of both helping the participants by reducing the drug‐related harm in their lives and of fostering conditions of inferiorization and enduring nonbecoming. 相似文献
237.
Mikko Jääskeläinen 《国际管理评论杂志》2012,14(4):444-463
This paper reviews and synthesizes the extant literature on venture capital syndication. By considering the questions of how, why and when syndication affects the performance of venture capitalist (VC) firms and their portfolio ventures, a schematic structure of the syndication literature is formed and areas for further research are identified. The results of the review show that, while the venture‐level aspects are relatively well understood, the current literature lacks an understanding of how and why syndication affects the performance of VC firms. This suggests that more attention should be directed towards syndication as a component of the overall strategy of VC firms. 相似文献
238.
Kerstin Vännman 《统计学通讯:理论与方法》2013,42(8):2049-2072
Vannman has earlier studied a class of capability indices, containing the indices C p , C pk , C pm and C pmk , when the tolerances are symmetric. We study the properties of this class when the tolerances are asymmetric and suggest a new enlargened class of indices. Under the assumption of normality an explicit form of the distribution of the new class of the estimated indices is provided. Numerical investigations are made to explore the behavior of the estimators of the indices for different values of the parameters. Based on the estimator a decision rule that can be used to determine whether the process can be considered capable or not is provided and suitable criteria for choosing an index from the family are suggested. 相似文献
239.
240.
Friedman's test is a widely used rank-based alternative to the analysis of variance (ANOVA) F-test for identifying treatment differences in a randomized complete block design. Many texts provide incomplete or misleading information about when Friedman's test may be appropriately applied. We discuss the assumptions needed for the test and common misconceptions. We show via simulation that when the variance or skew of the treatment distributions differ, application of Friedman's test to detect differences in treatment location can result in Type I error probabilities larger than the nominal α, and even when α is unaffected, the power of the test can be less than expected. 相似文献