全文获取类型
收费全文 | 2955篇 |
免费 | 127篇 |
专业分类
管理学 | 321篇 |
民族学 | 36篇 |
人才学 | 2篇 |
人口学 | 308篇 |
丛书文集 | 20篇 |
教育普及 | 1篇 |
理论方法论 | 322篇 |
综合类 | 31篇 |
社会学 | 1556篇 |
统计学 | 485篇 |
出版年
2023年 | 27篇 |
2022年 | 21篇 |
2021年 | 28篇 |
2020年 | 76篇 |
2019年 | 122篇 |
2018年 | 128篇 |
2017年 | 184篇 |
2016年 | 159篇 |
2015年 | 98篇 |
2014年 | 121篇 |
2013年 | 534篇 |
2012年 | 98篇 |
2011年 | 123篇 |
2010年 | 90篇 |
2009年 | 56篇 |
2008年 | 82篇 |
2007年 | 88篇 |
2006年 | 60篇 |
2005年 | 63篇 |
2004年 | 66篇 |
2003年 | 57篇 |
2002年 | 60篇 |
2001年 | 63篇 |
2000年 | 41篇 |
1999年 | 41篇 |
1998年 | 32篇 |
1997年 | 26篇 |
1996年 | 26篇 |
1995年 | 22篇 |
1994年 | 25篇 |
1993年 | 20篇 |
1992年 | 29篇 |
1991年 | 25篇 |
1990年 | 19篇 |
1989年 | 17篇 |
1988年 | 31篇 |
1987年 | 21篇 |
1986年 | 19篇 |
1985年 | 17篇 |
1984年 | 16篇 |
1983年 | 17篇 |
1982年 | 14篇 |
1981年 | 21篇 |
1980年 | 18篇 |
1979年 | 17篇 |
1978年 | 25篇 |
1977年 | 20篇 |
1976年 | 12篇 |
1975年 | 18篇 |
1968年 | 12篇 |
排序方式: 共有3082条查询结果,搜索用时 15 毫秒
51.
Myron P. Gutmann Kristine Witkowski Corey Colyer JoAnne McFarland O’Rourke James McNally 《Population research and policy review》2008,27(6):639-665
Spatially explicit data pose a series of opportunities and challenges for all the actors involved in providing data for long-term
preservation and secondary analysis—the data producer, the data archive, and the data user. We report on opportunities and
challenges for each of the three players, and then turn to a summary of current thinking about how best to prepare, archive,
disseminate, and make use of social science data that have spatially explicit identification. The core issue that runs through
the paper is the risk of the disclosure of the identity of respondents. If we know where they live, where they work, or where
they own property, it is possible to find out who they are. Those involved in collecting, archiving, and using data need to
be aware of the risks of disclosure and become familiar with best practices to avoid disclosures that will be harmful to respondents.
相似文献
Myron P. GutmannEmail: |
52.
This field study provides variables that can be used by practitioners as action levers and by future researchers as the basis for theoretical development. Conclusions from relevant literature and findings from interviews with interdisciplinary research management identified forty variables that were viewed as important to interdisciplinary research project success. After adjusting the data for reliability attenuation, these variables were further analyzed to identify the best prediction equation. The findings suggested that project age or the longevity of the project and open discussion of disagreements were the best predictors of performance. 相似文献
53.
Matthew Weinshenker 《Community, Work & Family》2016,19(4):396-413
This study assesses the impact of nonstandard employment schedules (shift work) on parenting among US fathers of young children in dual-earner couples. The outcomes examined include total caregiving, caregiving without the mother present, and the elements of father involvement proposed by Pleck: positive engagement, warmth, and control. Models with latent variables and with lagged dependent variables are estimated using three waves of nationally representative data from the Early Child Longitudinal Study – Birth Cohort. The results indicate that employment scheduling mainly shapes the context in which involvement takes place. Compared to dual-earner couples who are each employed during the day, fathers in couples in which at least one parent has a nonstandard schedule tend to care for their children more in the mother's absence. To a more limited extent, they also do more caregiving overall. These effects are most conclusively found when the father works during the day and the mother works during the evening, when the mother works during the day but the father works a night, split, rotating, or other shift, and when both parents have nonstandard schedules. Parental work schedules, however, have little impact on father involvement aside from care. 相似文献
54.
Matthew L. Cookman Jeffrey N. Weatherly 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2016,32(2):499-509
Previous research has shown that there are a number of risk factors for disordered and problem gambling, including an individual’s ethnicity and age. Endorsing gambling as an escape has also been shown to contribute to and maintain disordered gambling. The present study examined potential interactions between ethnicity and age as they relate to disordered gambling, as well as if ethnicity and age would be predictors of endorsing gambling as an escape. Three hundred fifteen adults from the United States completed measures relating to gambling. Participants were grouped into ethnic categories of Caucasian and non-Caucasian, and age groups of 18–25, 26–35, 36–55, and 56 years old and above. Non-Caucasians reported more gambling problems than Caucasians. A significant interaction was found between ethnicity and age for 36–55 year olds. Overall, participants were more likely to gamble for positive than negative reinforcement. However, only gambling as an escape was a significant predictor of disordered gambling. Implications and limitations are discussed with the thought that these results are informative to practitioners treating disordered gambling. 相似文献
55.
56.
One of the standard variable selection procedures in multiple linear regression is to use a penalisation technique in least‐squares (LS) analysis. In this setting, many different types of penalties have been introduced to achieve variable selection. It is well known that LS analysis is sensitive to outliers, and consequently outliers can present serious problems for the classical variable selection procedures. Since rank‐based procedures have desirable robustness properties compared to LS procedures, we propose a rank‐based adaptive lasso‐type penalised regression estimator and a corresponding variable selection procedure for linear regression models. The proposed estimator and variable selection procedure are robust against outliers in both response and predictor space. Furthermore, since rank regression can yield unstable estimators in the presence of multicollinearity, in order to provide inference that is robust against multicollinearity, we adjust the penalty term in the adaptive lasso function by incorporating the standard errors of the rank estimator. The theoretical properties of the proposed procedures are established and their performances are investigated by means of simulations. Finally, the estimator and variable selection procedure are applied to the Plasma Beta‐Carotene Level data set. 相似文献
57.
We are trapped in two divergent worlds when it comes to global views on homosexuality. There is the liberal world epitomized by Spain and other nations, where homosexuality is increasingly accepted; gays and lesbians are claiming their human rights; and laws are changing to codify that transformation. The second is the extremely anti-gay world symbolized by Africa, the Middle East and parts of Asia, where attitudes are favorable to criminalization. This research explains the “African Gap” in attitudes toward homosexuality in a comparative analysis of six African nations and Argentina and Canada, South and North America's most liberal nations on gay rights. Using Pew's 2015 Spring Global Attitudes Survey data, we find that the major variables have essentially similar effects on opinion in any context. Africa's distinction is explained by its comparatively higher levels of factors such as religion, morality dogma, and low socioeconomic status that generally retard support for homosexuality, at the same time of lower levels of factors such as education, urbanization, and personal liberty that increase gay support. Africa's extreme anti-gay outlook is mutable. Two social forces will facilitate this softening: expansion of liberalizing agents such as education and urbanization, and repositioning away from “traditionalism” toward modernism emphasizing individualism, civil rights, and personal liberties. 相似文献
58.
The current study tests the association between a composite measure of unsafe sex and sharing syringes for drug use with six of the more common lifetime traumatic/stressful events in 421 community mental health clients with severe mental illness (SMI) while controlling for psychiatric symptoms and related problems. A small but significant proportion of respondents said they had injected drugs with a shared needle in their lifetime (30, 7.2%), and a much larger proportion of respondents had engaged in unprotected sex (165, 39.2%). Unprotected sex and needle sharing were significantly correlated (Spearman’s rho = .20, p < .01). Frequency of lifetime traumatic events that occurred at least once was reported by one third to three quarters of clients depending on type of trauma. Regression analysis revealed that substance abuse and lifetime homelessness were significantly correlated with health risk behaviors. Practitioners need to be continuously vigilant to comorbid substance use and the housing needs of people with SMI. Limitations of the study include its cross-sectional design. 相似文献
59.
This qualitative content analysis of online documents compiled from the North American Animal Liberation Front (ALF), Earth Liberation Kollective (ELK) and Grassroots Ontario Animal Liberation (GOAL) network websites and Facebook pages explores how activism within the Radical Animal Liberation Movement (RALM) intersects with other social movements. While most literature to date traces the RALM’s (dis)junctures with other forms of social justice activism through analyses of their broad ideological assumptions, or the views of renowned RALM scholars, this research provides authentic insights into the voices of Canadian, American and Mexican activists as they are represented in documents they author themselves. Like activists in anarchistic, anti-capitalist, immigrant rights, Indigenous, prison abolition, prisoner support and radical feminist movements, those in the RALM critique capitalism, colonialism, hierarchy, racism, sexism, state power and the prison industrial complex. Our research calls into question the existing narratives that depict the RALM as an extremist, single-issue movement oblivious to all other forms of social inequality, injustice, marginalization and oppression. Rather, RALM activists are building alliances with other radical social movements to achieve the common goal of ending both human and animal suffering and exploitation. 相似文献
60.
Robert J. Mitkus David B. King Mark O. Walderhaug Richard A. Forshee 《Risk analysis》2014,34(4):735-750
The use of thimerosal preservative in childhood vaccines has been largely eliminated over the past decade in the United States because vaccines have been reformulated in single‐dose vials that do not require preservative. An exception is the inactivated influenza vaccines, which are formulated in both multidose vials requiring preservative and preservative‐free single‐dose vials. As part of an ongoing evaluation by USFDA of the safety of biologics throughout their lifecycle, the infant body burden of mercury following scheduled exposures to thimerosal preservative in inactivated influenza vaccines in the United States was estimated and compared to the infant body burden of mercury following daily exposures to dietary methylmercury at the reference dose established by the USEPA. Body burdens were estimated using kinetic parameters derived from experiments conducted in infant monkeys that were exposed episodically to thimerosal or MeHg at identical doses. We found that the body burden of mercury (AUC) in infants (including low birth weight) over the first 4.5 years of life following yearly exposures to thimerosal was two orders of magnitude lower than that estimated for exposures to the lowest regulatory threshold for MeHg over the same time period. In addition, peak body burdens of mercury following episodic exposures to thimerosal in this worst‐case analysis did not exceed the corresponding safe body burden of mercury from methylmercury at any time, even for low‐birth‐weight infants. Our pharmacokinetic analysis supports the acknowledged safety of thimerosal when used as a preservative at current levels in certain multidose infant vaccines in the United States. 相似文献