全文获取类型
收费全文 | 1484篇 |
免费 | 26篇 |
国内免费 | 1篇 |
专业分类
教育 | 1083篇 |
科学研究 | 115篇 |
各国文化 | 21篇 |
体育 | 111篇 |
综合类 | 1篇 |
文化理论 | 15篇 |
信息传播 | 165篇 |
出版年
2022年 | 11篇 |
2021年 | 18篇 |
2020年 | 28篇 |
2019年 | 35篇 |
2018年 | 55篇 |
2017年 | 51篇 |
2016年 | 61篇 |
2015年 | 29篇 |
2014年 | 35篇 |
2013年 | 341篇 |
2012年 | 33篇 |
2011年 | 44篇 |
2010年 | 26篇 |
2009年 | 29篇 |
2008年 | 34篇 |
2007年 | 36篇 |
2006年 | 38篇 |
2005年 | 18篇 |
2004年 | 25篇 |
2003年 | 21篇 |
2002年 | 19篇 |
2001年 | 14篇 |
2000年 | 29篇 |
1999年 | 23篇 |
1998年 | 15篇 |
1997年 | 21篇 |
1996年 | 20篇 |
1995年 | 21篇 |
1994年 | 24篇 |
1993年 | 19篇 |
1992年 | 20篇 |
1991年 | 18篇 |
1990年 | 17篇 |
1989年 | 15篇 |
1988年 | 9篇 |
1987年 | 9篇 |
1986年 | 9篇 |
1985年 | 13篇 |
1984年 | 20篇 |
1983年 | 15篇 |
1982年 | 14篇 |
1981年 | 16篇 |
1980年 | 9篇 |
1978年 | 12篇 |
1976年 | 9篇 |
1975年 | 6篇 |
1972年 | 6篇 |
1970年 | 6篇 |
1927年 | 6篇 |
1923年 | 6篇 |
排序方式: 共有1511条查询结果,搜索用时 15 毫秒
31.
32.
Janice Taylor GordonAuthor Vitae 《Journal of The Franklin Institute》2002,339(3):321-333
The Franklin Institute, Philadelphia, Pennsylvania awarded the 2001 Benjamin Franklin Medal in Life Science to Judah Folkman for his founding of the field of angiogenesis research and demonstration that angiogenesis is a necessary factor in the conversion of abnormal cells to malignant tumors. 相似文献
33.
Kohlberg's (1966) hypothesis that the attainment of gender constancy motivates children to attend to gender norms was reevaluated by examining these links in relation to age. Ninety-four 3- to 7-year-old children were interviewed to assess whether and how constancy mediates age-related changes in gender-related beliefs. As expected, results indicated a general pattern of an increase in stereotype knowledge, the importance and positive evaluation of one's own gender category, and rigidity of beliefs between the ages of 3 and 5. Moreover, the stability phase, rather than full constancy, mediated some of these relations. After age 5, rigidity generally decreased with age, with relations primarily mediated by consistency. 相似文献
34.
OBJECTIVE: Much research has been done to examine the long-term effects of being victimized by sexual, physical, and/or emotional abuse in childhood, but much less research has focused on the impact of childhood neglect experiences. This study examines the role that childhood neglect has on adult women's involvement in HIV-related risky behaviors. METHODS: The data come from a study of 250 "at risk" women living in the Atlanta, GA metropolitan area, most of whom were African American. Data were collected in face-to-face interviews between 1997 and 2000. Multiple regression was used to explore the relationship between childhood neglect experiences, self-esteem, attitudes toward condom use, and involvement in HIV-related risky behaviors. RESULTS: Overall, the model tested received strong support by the study data. Childhood neglect led to reduced self-esteem. Neglect was associated with worsened attitudes toward condom use and women who experienced childhood neglect also reported more involvement in HIV risk behaviors. CONCLUSIONS: HIV intervention programs ought to target women who have experienced childhood neglect, as neglect experiences have adverse impacts upon their self-esteem, condom-related attitudes, and HIV risk behavior practices in adulthood. 相似文献
35.
Individual, family, and neighborhood factors distinguish resilient from non-resilient maltreated children: a cumulative stressors model 总被引:2,自引:0,他引:2
OBJECTIVE: Children who are physically maltreated are at risk of a range of adverse outcomes in childhood and adulthood, but some children who are maltreated manage to function well despite their history of adversity. Which individual, family, and neighborhood characteristics distinguish resilient from non-resilient maltreated children? Do children's individual strengths promote resilience even when children are exposed to multiple family and neighborhood stressors (cumulative stressors model)? METHODS: Data were from the Environmental Risk Longitudinal Study which describes a nationally representative sample of 1,116 twin pairs and their families. Families were home-visited when the twins were 5 and 7 years old, and teachers provided information about children's behavior at school. Interviewers rated the likelihood that children had been maltreated based on mothers' reports of harm to the child and child welfare involvement with the family. RESULTS: Resilient children were those who engaged in normative levels of antisocial behavior despite having been maltreated. Boys (but not girls) who had above-average intelligence and whose parents had relatively few symptoms of antisocial personality were more likely to be resilient versus non-resilient to maltreatment. Children whose parents had substance use problems and who lived in relatively high crime neighborhoods that were low on social cohesion and informal social control were less likely to be resilient versus non-resilient to maltreatment. Consistent with a cumulative stressors model of children's adaptation, individual strengths distinguished resilient from non-resilient children under conditions of low, but not high, family and neighborhood stress. CONCLUSION: These findings suggest that for children residing in multi-problem families, personal resources may not be sufficient to promote their adaptive functioning. 相似文献
36.
37.
38.
This study examined the effects of race of examiner and type of reinforcement upon the WISC-R performance of lower-class black children. A total of 120 black males were selected and assigned to either a white or black examiner to form two groups. Within each group, children were given no reinforcement, tangible reinforcement, traditional social reinforcement, or culturally relevant social reinforcement after each correct response. Children given tangible rewards, regardless of race of examiner, obtained significantly higher scores than did children given no reinforcement or children given traditional social reinforcement. Also, children given culturally relevant social reinforcement by a black examiner obtained significantly higher scores than did children given culturally relevant reinforcement by the white examiner. 相似文献
39.
Using data on the ‘career’ paths of one thousand ‘leading scientists’ from 1450 to 1900, what is conventionally called the
‘rise of modern science’ is mapped as a changing geography of scientific practice in urban networks. Four distinctive networks
of scientific practice are identified. A primate network centred on Padua and central and northern Italy in the sixteenth
century expands across the Alps to become a polycentric network in the seventeenth century, which in turn dissipates into
a weak polycentric network in the eighteenth century. The nineteenth century marks a huge change of scale as a primate network
centred on Berlin and dominated by German-speaking universities. These geographies are interpreted as core-producing processes
in Wallerstein’s modern world-system; the rise of modern scientific practice is central to the development of structures of
knowledge that relate to, but do not mirror, material changes in the system.
相似文献
David M. EvansEmail: |
40.