全文获取类型
收费全文 | 11612篇 |
免费 | 345篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1592篇 |
民族学 | 72篇 |
人才学 | 3篇 |
人口学 | 1041篇 |
丛书文集 | 74篇 |
教育普及 | 1篇 |
理论方法论 | 1192篇 |
综合类 | 231篇 |
社会学 | 6064篇 |
统计学 | 1689篇 |
出版年
2020年 | 167篇 |
2019年 | 281篇 |
2018年 | 290篇 |
2017年 | 410篇 |
2016年 | 294篇 |
2015年 | 221篇 |
2014年 | 287篇 |
2013年 | 1904篇 |
2012年 | 377篇 |
2011年 | 376篇 |
2010年 | 296篇 |
2009年 | 283篇 |
2008年 | 270篇 |
2007年 | 321篇 |
2006年 | 285篇 |
2005年 | 291篇 |
2004年 | 276篇 |
2003年 | 198篇 |
2002年 | 243篇 |
2001年 | 299篇 |
2000年 | 246篇 |
1999年 | 230篇 |
1998年 | 182篇 |
1997年 | 171篇 |
1996年 | 167篇 |
1995年 | 156篇 |
1994年 | 162篇 |
1993年 | 166篇 |
1992年 | 166篇 |
1991年 | 164篇 |
1990年 | 165篇 |
1989年 | 158篇 |
1988年 | 139篇 |
1987年 | 161篇 |
1986年 | 133篇 |
1985年 | 156篇 |
1984年 | 164篇 |
1983年 | 147篇 |
1982年 | 131篇 |
1981年 | 98篇 |
1980年 | 115篇 |
1979年 | 123篇 |
1978年 | 108篇 |
1977年 | 90篇 |
1976年 | 96篇 |
1975年 | 105篇 |
1974年 | 94篇 |
1973年 | 74篇 |
1972年 | 63篇 |
1971年 | 55篇 |
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
471.
Fostering participant engagement is a challenging but essential component of effective prevention programs. To better understand which factors influence engagement, this study examines several predictors of couple engagement in Family Foundations (FF), a preventive intervention for first-time parents shown to enhance parent mental health, couple relations, parenting quality, and child adjustment through age 3 years. FF consists of a series of classes delivered through childbirth education departments at local hospitals. Baseline data on socio-demographics, parent mental health, and couple relationship quality were examined as predictors of participants’ level of engagement in FF (n = 89 couples, 178 individuals). Sociodemographic variables such as parent gender, socioeconomic status, and age predicted program engagement to a limited extent. However, findings indicated that marital status was the best predictor of engagement. Discussion focuses on how findings can inform the development of practices that promote engagement, such as the use of targeted outreach efforts for individuals most at risk of disengagement. 相似文献
472.
Ellis B Alford A Yu P Xiong S Hill G Puckett M Mannix D Wells ME 《Evaluation and program planning》2012,35(2):287-292
A three-level growth-curve model was applied to estimate perceived impact growth trajectories, using multi-year data from project and school surveys on outcome and program implementation collected from 59 sites and approximately 1165 participating schools in the Safe Schools and Healthy Students Initiative. Primary interest is to determine whether and how project-level and school-level correlates affect schools’ perceptions of the Initiative's effectiveness over time when the effects of the pre-grant environmental conditions, grant operations, and near-term outcomes are considered. Coordination and service integration, comprehensive programs and activities for early childhood development, and change in school involvement were found to be significant predictors of school-perceived overall impact when the effect of poverty was considered. Partnership functioning, perceived importance of school resources, and school involvement were found to be significant predictors of school-perceived impact on substance use prevention when the effect of poverty was considered. 相似文献
473.
About 50?years ago, Efron noted some counterintuitive properties of the long-term behavior of contests involving dice. For instance, consider the 6-sided dice whose sides are labeled (4,4,4,4,0,0), (3,3,3,3,3,3), (6,6,2,2,2,2), and (5,5,5,1,1,1). Each die has a 2/3 probability of rolling a higher number than the next one in the list and the last has the same 2/3 probability of rolling a higher number than the first. The non-transitivity of games involving non-identical dice was popularized by Gardner (Sci Am, 223:110–114, 1970). Although Gardner and other authors have observed that non-transitive dice serve to illustrate the complexities of the theory of voting, it does not seem that much attention has been paid to the corresponding voting system. Our purpose in this article is to present this voting system and compare its properties with those of other voting systems. One of the most interesting properties is the fact that cancellation with respect to the Efron dice voting system can replace cancellation with respect to pairwise preferences in Young’s characterization of the social choice function associated with the Borda Count. 相似文献
474.
475.
Abstract Objective: This study aimed to understand the gaps in college students' knowledge regarding sexual health information. Participants: A sample of 242 participants enrolled in an introductory college course participated in this study in the Fall 2009 semester. Methods: Students participated in 1 of 2 brief interventions and wrote a response paper about their experience. The papers were analyzed using conventional content analysis for information that was new to participants by looking for key words that suggested learning took place. Results: The findings indicated that the majority of participants learned new information. Most learning occurred regarding sexually transmitted infections (ie, types, symptoms, prevalence, treatment, testing) and correct condom use. There were also demographic differences regarding reported new information. Conclusions: Findings can be used to develop future sex education programs for college students by providing college educators with an understanding of where students lack knowledge of sexual health. 相似文献
476.
477.
478.
This paper examines rural population ageing in the United States with a particular focus on the contrasting contexts in which older rural residents live. We compare the characteristics of the older population by rural versus urban residence, and explore challenges and opportunities associated with the ageing of rural baby boomers. The United States is a vast territory, and rural areas in the US are diverse regionally, in poverty and income, principal forms of employment, proximity to metropolitan areas, population size, density and composition, the history of change in these parameters, and a number of other factors that affect the ageing process. Hence, the diversity across rural areas is an important consideration in what affects the well being of rural elderly individuals, as well as the community-level impacts of rural ageing. Further, the characteristics of the older rural population help shape community and rural development outcomes for diverse rural communities. We use data from various US Census Bureau sources, and cite other studies to provide a demographic overview of ageing in the rural United States, and to analyze how this situation differs in varying socio-demographic and regional contexts. In the concluding section, we focus on policy implications associated with rural ageing. 相似文献
479.
Judith M. Brown 《Australian and New Zealand Journal of Family Therapy》2012,33(4):266-282
In the family therapy literature there is increasing interest in the dialogical approach, particularly as it becomes well‐grounded in psychotherapy research. One embodiment is ‘open dialogues’, which has developed over a 30‐year period in Western Lapland, Finland. This paper outlines my experience of visiting Keropudas Hospital in Tornio, Finland, the birthplace of open dialogues. It explores the seven theoretical principles of open dialogues, associated elements of clinical practice, and the therapist use of self. The author utilises these aspects to reflect on dialogical moments through words and images based on three conceptual themes, which illustrate the relevance of open dialogues for family therapy practitioners and their contexts. 相似文献
480.
Although studies document the health-enhancing effects of social engagement, they reveal little about the underlying mechanisms operating within specific organizational contexts. Limited attention is given to the role of inequality - particularly age and gender - in shaping either the organizations to which we belong or their consequences for our well-being. We address this issue by examining the Red Hat Society, a social organization for middle-aged and older women. Interviews with members (n=52) illustrate how age and gender inequality interact to shape the organization, which can be viewed as a gendered subculture of aging. Drawing on this framework, we discuss four processes through which participation generates benefits for older women involved in age- and gender-segregated organizations: enhancing social networks, countering invisibility, creating positive frames for aging experiences, and promoting youthful identities. 相似文献