全文获取类型
收费全文 | 1798篇 |
免费 | 34篇 |
专业分类
教育 | 1251篇 |
科学研究 | 162篇 |
各国文化 | 34篇 |
体育 | 187篇 |
文化理论 | 14篇 |
信息传播 | 184篇 |
出版年
2022年 | 13篇 |
2021年 | 16篇 |
2020年 | 34篇 |
2019年 | 73篇 |
2018年 | 83篇 |
2017年 | 78篇 |
2016年 | 55篇 |
2015年 | 40篇 |
2014年 | 54篇 |
2013年 | 387篇 |
2012年 | 44篇 |
2011年 | 43篇 |
2010年 | 29篇 |
2009年 | 34篇 |
2008年 | 42篇 |
2007年 | 32篇 |
2006年 | 46篇 |
2005年 | 21篇 |
2004年 | 33篇 |
2003年 | 29篇 |
2002年 | 24篇 |
2001年 | 24篇 |
2000年 | 37篇 |
1999年 | 22篇 |
1998年 | 18篇 |
1997年 | 19篇 |
1996年 | 10篇 |
1994年 | 22篇 |
1993年 | 18篇 |
1992年 | 18篇 |
1991年 | 15篇 |
1990年 | 14篇 |
1989年 | 19篇 |
1988年 | 18篇 |
1987年 | 13篇 |
1986年 | 15篇 |
1985年 | 15篇 |
1984年 | 17篇 |
1983年 | 13篇 |
1981年 | 12篇 |
1979年 | 19篇 |
1978年 | 9篇 |
1974年 | 14篇 |
1973年 | 10篇 |
1972年 | 9篇 |
1971年 | 9篇 |
1970年 | 9篇 |
1927年 | 10篇 |
1926年 | 10篇 |
1920年 | 8篇 |
排序方式: 共有1832条查询结果,搜索用时 46 毫秒
31.
32.
Although the principle of holography was conceived as long ago as 1947, interest was limited until the advent of the laser in 1960 made possible the off-axis holography widely used today. Since then holography has found many applications and become so well known outside the laboratory as to be a recognized art form. Within the last few years considerable progress has also been made in acoustic holography. 相似文献
33.
34.
Thomas E. Gaston Francesca Ounsworth Tessa Senders Sarah Ritchie Emma Jones 《Learned Publishing》2020,33(2):154-162
Previous research has found that researchers rank journal reputation and impact factor (IF) amongst the key selection criteria when choosing where to submit. We explored the actual effect upon submission numbers of several possible factors. We retrieved 10 years of submission data from over a thousand journals, as well as data on IF, retractions, and other factors. We performed statistical analysis and identified correlations. We also undertook case study research on the 55 most significant submission decreases. We found a statistically significant correlation between changes in IF, ISI percentage ranking, and changes in submissions numbers in subsequent years. We also found a statistically significant effect on submission numbers in the year following the publication of a retraction. Our case studies identified other factors, including negative feedback on the peer review process. Our findings regarding IF confirm previous indications about the significance of IF on submissions. We explain the correlation with retractions through the concept of ‘peer review reputation’. These results indicate that editors and publishers need to focus on a journal's peer review practices, as well as a journal's IF, if they are to maintain and grow submissions. 相似文献
35.
Middle grades science teachers need professional support in practice as they implement new inquiry-based science. Professional
development schools can provide this bottom-up support through connecting preservice and inservice teacher education programs
in classroom practice. In this study, coteaching arrangements with secondary science education majors provided additional
teachers in the classroom to support a materials-rich curriculum and the needed associated pedagogies. Science education majors
provided needed assistance in troubleshooting difficulties with the new curriculum. They also provided needed content knowledge
to support inquiry, along with creating moments and space for teachers to reflect on inquiry practice. Ongoing assistance
by preservice teachers allowed inservice teachers to progress from logistical concerns in implementing kit curriculum to concerns
regarding student learning and the supporting professional development.
相似文献
Charles J. EickEmail: |
36.
OBJECTIVE: The Children's Advocacy Center (CAC) model of child abuse investigation is designed to be more child and family-friendly than traditional methods, but there have been no rigorous studies of their effect on children's and caregivers' experience. Data collected as part of the Multi-Site Evaluation of Children's Advocacy Centers were used to examine whether CACs improve caregivers' and children's satisfaction with investigations. METHODS: Nonoffending caregiver and child satisfaction were assessed during research interviews, including the administration of a 14-item Investigation Satisfaction Scale (ISS) for caregivers. Two hundred and twenty-nine sexual abuse cases investigated through a CAC were compared to 55 cases investigated in communities with no CAC. RESULTS: Hierarchical linear regression results indicated that caregivers in CAC cases were more satisfied with the investigation than those from comparison sites, even after controlling for a number of relevant variables. There were few differences between CAC and comparison samples on children's satisfaction. Children described moderate to high satisfaction with the investigation, while a minority expressed concerns about their experience. CONCLUSIONS: The CAC model shows promise for improving families' experiences, but to build upon this promise, agencies will need to systematize procedures for refining and adapting the model as new research becomes available. 相似文献
37.
OBJECTIVE: Children's Advocacy Centers (CACs) aim to improve child forensic interviewing following allegations of child abuse by coordinating multiple investigations, providing child-friendly interviewing locations, and limiting redundant interviewing. This analysis presents one of the first rigorous evaluations of CACs' implementation of these methods. METHODS: This analysis is part of a quasi-experimental study, the Multi-Site Evaluation of Children's Advocacy Centers, which evaluated four CACs relative to within-state non-CAC comparison communities. Case abstractors collected data on investigation methods in 1,069 child sexual abuse cases with forensic interviews by reviewing case records from multiple agencies. RESULTS: CAC cases were more likely than comparison cases to feature police involvement in CPS cases (41% vs. 15%), multidisciplinary team (MDT) interviews (28% vs. 6%), case reviews (56% vs. 7%), joint police/child protective services (CPS) investigations (81% vs. 52%) and video/audiotaping of interviews (52% vs. 17%, all these comparisons p<.001). CACs varied in which coordination methods they used, and some comparison communities also used certain coordination methods more than the CAC with which they were paired. Eighty-five percent of CAC interviews took place in child-friendly CAC facilities, while notable proportions of comparison interviews took place at CPS offices (22%), police facilities (18%), home (16%), or school (19%). Ninety-five percent of children had no more than two forensic interviews, and CAC and comparison differences on number of interviews were mostly non-significant. CONCLUSIONS: Relative to the comparison communities, these CACs appear to have increased coordination on investigations and child forensic interviewing. The CAC setting was the location for the vast majority of CAC child interviews, while comparison communities often used settings that many consider undesirable. CACs showed no advantage on reducing the number of forensic interviews, which was consistently small across the sample. 相似文献
38.
Rhys C. Jones 《Teaching Statistics》2019,41(1):36-40
The use of statistical investigations as a teaching strategy have been shown to both motivate and engage students. The implementation of a statistical investigation to measure intelligence is described, covering core statistical principles and key elements of research design. 相似文献
39.
Charlotte Jones 《International Journal of Early Years Education》2019,27(2):153-169
This case study attempts to capture the way gender is constructed and experienced in the social world of the nursery school. It presents findings from a staff survey, structured and unstructured observations of one male’s and one female’s professional practice and one-to-one interviews with children aged three to four years. Despite practitioners’ reported intentions to challenge traditional notions of gender, construction of traditional gender distinctions was not problematised by staff and was upheld by comments of children. Children appeared to construct themselves in terms of gender stereotypes and were offered only limited alternative gender positions by the male and female practitioners. 相似文献
40.
This study demonstrates how academicians and practitioners can work together on an important topic that matters to organizational performance: the pivotal role played by salespeople during new product launches. In particular, the authors present three potential interventions that training and sales managers may use to sell a new product to salespeople. The results legitimatize the critical contribution of sales training to new product sales performance and highlight the value of the partnership between training professionals and sales managers. 相似文献