首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2180篇
  免费   31篇
教育   1552篇
科学研究   144篇
各国文化   19篇
体育   218篇
文化理论   17篇
信息传播   261篇
  2022年   11篇
  2021年   14篇
  2020年   36篇
  2019年   74篇
  2018年   96篇
  2017年   89篇
  2016年   72篇
  2015年   40篇
  2014年   59篇
  2013年   510篇
  2012年   47篇
  2011年   46篇
  2010年   32篇
  2009年   42篇
  2008年   47篇
  2007年   37篇
  2006年   55篇
  2005年   31篇
  2004年   48篇
  2003年   38篇
  2002年   43篇
  2001年   32篇
  2000年   44篇
  1999年   38篇
  1998年   24篇
  1997年   26篇
  1996年   15篇
  1995年   15篇
  1994年   27篇
  1993年   19篇
  1992年   22篇
  1991年   26篇
  1990年   17篇
  1989年   24篇
  1988年   21篇
  1987年   16篇
  1986年   15篇
  1985年   20篇
  1984年   25篇
  1983年   18篇
  1982年   10篇
  1981年   16篇
  1980年   14篇
  1979年   25篇
  1977年   12篇
  1974年   14篇
  1972年   9篇
  1971年   10篇
  1927年   8篇
  1926年   10篇
排序方式: 共有2211条查询结果,搜索用时 8 毫秒
31.
A century before the outbreak of bovine spongiform encephalopathy (BSE), Great Britain and North America grappled with pleuro-pneumonia - a disease in cattle that had equally maddening consequences. Towards the end of the 19th century, this condition was at the heart of a transatlantic trade dispute that lasted for decades and attracted the attention of livestock farmers, diplomats, shipping moguls, veterinarians, public health regulators and journalists the world over. Scientific controversy aggravated the situation when there were doubts about the scientific judgment of Privy Council veterinary officials, who were simultaneously conducting disease-diagnosis activities and pushing for tighter regulations at British ports. At this point, William Williams, principal of the New Veterinary College in Edinburgh, waded into this troubled arena. His strong convictions spawned a long-running disagreement with the British Government over the diagnoses of pleuro-pneumonia in cattle imported from the USA and Canada.  相似文献   
32.
33.
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   
34.
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.
Charles J. EickEmail:
  相似文献   
35.
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   
36.
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   
37.
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   
38.
Labeling bias refers to expectations that others might have for a person given a particular label. This study investigated the effects of labeling bias on prognostic outlook for children as a function of diagnostic labels and professional group membership. School psychologists, regular and special education teachers, and introductory psychology students read a vignette that described an elementary-school-aged boy with behavior problems. The vignette was held constant for all participants, but one of four labels (conduct disordered, socially maladjusted, serious emotionally disturbed, no exceptionality) was varied at the end of the vignette. Respondents then estimated the child's likelihood of future success in interpersonal relationships, the likelihood of further behavioral difficulties, and overall adjustment of the child. There was a significant effect noted for diagnostic label across all professionals on the interpersonal relations variable; the serious emotionally disturbed label resulted in judgments of significantly poorer outlook than any other diagnostic label except socially maladjusted. There were no other significant labeling bias effects for the other dependent measures, but a main effect for diagnostic label on judgment of overall adjustment did approach significance. There were no significant effects noted for professional group membership. Professionals should consider the use of a label other than SED to minimize labeling bias effects on judgment of interpersonal adjustment in children with behavioral difficulties. © 1996 John Wiley & Sons, Inc.  相似文献   
39.
This study explored the relationship between metacognition and intelligence in a group of normal adolescents. The relationship has strong theoretical support in current conceptions of intelligence. For the purposes of this study metacognition was assessed across three different cognitive problem sets. Correlational analyses indicated a nonsignificant relationship between intelligence and metacognition. These results suggest that tests of metacognition and intelligence may tap unrelated aspects of cognition and that additional research will be required to understand the relationship between these two constructs.  相似文献   
40.
The present study aimed to investigate pre-sleep behaviours (including evening electronic device use) and sleep quantity in well-trained athletes. Seventy well-trained athletes (44 females, 26 males) aged 21 ± 4 y from a range of team and individual sports were asked to complete an online sleep diary for 7 days. The sleep diary included questions about pre-sleep behaviours (e.g. napping, caffeine intake), electronic device use in the 2 h prior to bedtime (e.g. type of device and duration of use) and sleep (e.g. time in bed, sleep onset latency). On average, athletes spent 8:20 ± 1:21 h in bed each night. Associations between age, time in bed and sleepiness suggested that younger athletes spent more time in bed (= -0.05, p = 0.001) but felt sleepier (r = -0.32, p < 0.01) than older athletes. On average, athletes mostly used electronic devices for 0–30 min prior to sleep. The use of multiple devices in the evening was associated with more perceived difficulty in falling asleep (= 0.22, p = 0.03), but no associations existed with other sleep variables. In summary, younger athletes may require later start times or improved sleep quality to resolve excessive sleepiness.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号