全文获取类型
收费全文 | 3564篇 |
免费 | 470篇 |
国内免费 | 26篇 |
专业分类
管理学 | 22篇 |
劳动科学 | 1篇 |
民族学 | 11篇 |
人口学 | 254篇 |
丛书文集 | 166篇 |
理论方法论 | 1022篇 |
综合类 | 867篇 |
社会学 | 1684篇 |
统计学 | 33篇 |
出版年
2024年 | 15篇 |
2023年 | 95篇 |
2022年 | 27篇 |
2021年 | 82篇 |
2020年 | 114篇 |
2019年 | 185篇 |
2018年 | 179篇 |
2017年 | 215篇 |
2016年 | 174篇 |
2015年 | 154篇 |
2014年 | 177篇 |
2013年 | 701篇 |
2012年 | 149篇 |
2011年 | 148篇 |
2010年 | 125篇 |
2009年 | 149篇 |
2008年 | 148篇 |
2007年 | 159篇 |
2006年 | 140篇 |
2005年 | 147篇 |
2004年 | 141篇 |
2003年 | 128篇 |
2002年 | 121篇 |
2001年 | 112篇 |
2000年 | 73篇 |
1999年 | 45篇 |
1998年 | 30篇 |
1997年 | 31篇 |
1996年 | 31篇 |
1995年 | 23篇 |
1994年 | 7篇 |
1993年 | 9篇 |
1992年 | 14篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1982年 | 1篇 |
排序方式: 共有4060条查询结果,搜索用时 15 毫秒
101.
102.
Nil Kamal Hazra 《统计学通讯:理论与方法》2017,46(19):9842-9858
Stochastic orders are very useful tools to compare the lifetimes of two systems. Optimum lifetime of a series (resp. parallel) system with general standby component(s) depends on the allocation strategy of standby component(s) into the system. Here, we discuss three different models of one or more standby components. In each model, we compare different series (resp. parallel) systems (which are formed through different allocation strategies of standby component(s)) with respect to the usual stochastic order and the stochastic precedence order. The results related to the cold as well as the hot standby models are obtained as particular cases of the results discussed in this article because the model considered here is a general one. 相似文献
103.
The older the bolder: Does relative age among peers influence children’s preference for competition?
Having been relatively old at school tends to have a long lasting positive effect on professional achievement, in particular in competitive environments (sports, politics). We investigate the roots of this pattern and study whether the relative age position of children at school plays a role in shaping their preference for competition. We run a controlled experiment in high schools across two states in Australia. Our participants are students who are the very oldest or very youngest in their classroom. We elicit their preference for competition using the Niederle and Vesterlund (2007) task and find evidence of an effect of relative age. This effect is concentrated on male students. We find no differences in self-confidence, and risk attitudes between relatively old and young students. These results suggest that the observed pattern may come from pure preference for competition. 相似文献
104.
Multi-sectoral programs that involve stakeholders in agriculture, nutrition and health care are essential for responding to nutrition problems such as vitamin A deficiency among pregnant and lactating women and their infants in many poor areas of lower income countries. Yet planning such multi-sectoral programs and designing appropriate evaluations, to respond to different disciplinary cultures of evidence, remain a challenge. We describe the context, program development process, and evaluation design of the Mama SASHA project (Sweetpotato Action for Security and Health in Africa) which promoted production and consumption of a bio-fortified, orange-fleshed sweetpotato (OFSP). In planning the program we drew upon information from needs assessments, stakeholder consultations, and a first round of the implementation evaluation of a pilot project. The multi-disciplinary team worked with partner organizations to develop a program theory of change and an impact pathway which identified aspects of the program that would be monitored and established evaluation methods. Responding to the growing demand for greater rigour in impact evaluations, we carried out quasi-experimental allocation by health facility catchment area, repeat village surveys for assessment of change in intervention and control areas, and longitudinal tracking of individual mother-child pairs. Mid-course corrections in program implementation were informed by program monitoring, regular feedback from implementers and partners’ meetings. To assess economic efficiency and provide evidence for scaling we collected data on resources used and project expenses. Managing the multi-sectoral program and the mixed methods evaluation involved bargaining and trade-offs that were deemed essential to respond to the array of stakeholders, program funders and disciplines involved. 相似文献
105.
This study investigated the relationships between types of activity and quality of life (QOL) for older men and women at different ages. Based on cross-sectional data that included 220 community-dwelling elderly persons aged 65 and older in southern Taiwan, the results showed that the participation rates in many activities declined with age for both genders. Social activity and solitary leisure activity were significantly associated with QOL for old-old men, but not for young-old men. Only social activity was significantly associated with QOL for young-old women, but there was no significant association between any activity and QOL for old-old women. 相似文献
106.
107.
The current study examined associations between mothers’ behavioral profiles during mother‐child conflict interactions and their children's social skills. This person‐centered approach classified 181 mothers according to their levels of emotional responsiveness, intrusiveness, negativity, and engagement facilitation behaviors during an eight‐minute conflict discussion task with their child. Three distinct classes of mothers were identified using latent profile analysis: sensitive/engaged, moderately sensitive/engaged, and insensitive/disengaged. An analysis of covariance indicated that children of mothers in the sensitive/engaged group had significantly higher social skills than children of mothers in the moderately sensitive/engaged and insensitive/disengaged groups. Results suggest that mother‐child conflict interactions may benefit children's social development when mothers facilitate their children's participation in a highly sensitive manner. 相似文献
108.
Juan Manuel Moreno-Manso Mª Elena García-Baamonde Eloísa Guerrero-Barona Mª José Godoy-Merino Macarena Blázquez-Alonso Pablo González-Rico 《Journal of youth studies》2016,19(6):821-835
This research work analyses the emotional intelligence (EI) and the social cognitive attitudes and strategies in adolescents between 12 and 17 years of age in residential care. The aim of the work is to identify those aspects that hinder their socio-emotional competence, requiring a more urgent intervention. We explore the presence of significant differences between the variables under study according to gender and age range (12–14 and 15–17) and we analyse the relationship between the dimensions of their EI and their social competence. The results show a lack of EI in these adolescents, with all three dimensions being affected: emotional attention, clarity of feelings and emotional repair. As for social competence, it can be seen that the adolescents are characterised by a lack of confidence and firmness in their interactions. Worthy of note is the impulsive cognitive style, as are the rigidity of thought and the tendency towards social mistrust and suspicion. There are many difficulties concerning the strategies for resolving social problems. This research highlights the need to design training programmes for the residential care centres that will favour their socio-emotional development. 相似文献
109.
Riikka Kotanen 《Children & Society》2018,32(2):110-120
This study explores perceptions of parent to child violence, the arguments for imposing legal regulation, and the intended objectives of the legislative process that led to a ban in Finland in 1983. This qualitative policy analysis examines policy documents alongside expert interviews with professional on the legislative process. The example of Finland shows that a significant change in attitudes and decreased levels of violence towards children can be achieved without the threat of legal punishment, even without specific intervention policies. However, the study emphasises the importance of establishing clear practices alongside altering legislation which has been inadequate in Finland. 相似文献
110.
A Route to Safety: Using Bus Boarding Data to Identify Roles for Transport Providers within Contextual Safeguarding Systems 下载免费PDF全文
During adolescence, risk to young people's safety shifts from familial to community contexts. Contextual safeguarding has emerged in response to this dynamic; by providing a conceptual framework through which to incorporate extra‐familial contexts (and those who manage them) into traditionally family focused child protection systems. This paper uses Geographic Information System mapping techniques to explore the extent to which bus boarding data could be used to: target protective interventions in public spaces; evidence routes where young people may be vulnerable; and build local area problem profiles. In doing so it provides foundational evidence for including transport providers in contextual safeguarding systems. 相似文献