全文获取类型
收费全文 | 3309篇 |
免费 | 77篇 |
国内免费 | 57篇 |
专业分类
教育 | 1772篇 |
科学研究 | 773篇 |
体育 | 46篇 |
综合类 | 125篇 |
文化理论 | 16篇 |
信息传播 | 711篇 |
出版年
2024年 | 3篇 |
2023年 | 9篇 |
2022年 | 34篇 |
2021年 | 67篇 |
2020年 | 128篇 |
2019年 | 164篇 |
2018年 | 77篇 |
2017年 | 108篇 |
2016年 | 125篇 |
2015年 | 191篇 |
2014年 | 444篇 |
2013年 | 420篇 |
2012年 | 420篇 |
2011年 | 344篇 |
2010年 | 144篇 |
2009年 | 127篇 |
2008年 | 115篇 |
2007年 | 115篇 |
2006年 | 112篇 |
2005年 | 69篇 |
2004年 | 57篇 |
2003年 | 47篇 |
2002年 | 43篇 |
2001年 | 25篇 |
2000年 | 24篇 |
1999年 | 8篇 |
1998年 | 3篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有3443条查询结果,搜索用时 824 毫秒
51.
Synthesis of Materials is regarded as an important core subject in engineering education. However, many concepts and knowledge in the material synthesis can be rather abstract and difficult to understand by the student learners. Experiments are limited in scope due to lack of equipment, control of toxic materials, and risks of chemical reactions, which often restricts student imagination and student involvement in practical training. These reasons often led to poor learning attitude and learning performance among the students. Rapid developments in Cloud technology and mobile devices have provided new opportunities for developing novel learning tools for material synthesis. This study aims to introduce interest factors as a strategy for promoting learning interest and practical skills among the students. Chemical symbols, experimental themes, texts, and interactive elements were utilized to develop a theme-based Mobile Learning APP for teaching the practical techniques of material synthesis. The Mobile Learning APP was then integrated into a problem-based learning activity. A quasi-experimental design was used to investigate the resulting learning effectiveness from using the developed Mobile Learning APP. Results show that the Mobile Learning APP provided a significant positive effect on learning performance and that most students showed favorable attitudes toward the usage of the mobile learning system. 相似文献
52.
This study examined the use of iPads with anatomy applications (apps) in the laboratory sections of the largest undergraduate course at the university, Anatomy and Physiology, serving more than 300 students. The majority of these students were nursing, exercise science/physical education and biology majors. With a student survey (student opinion) and student practicum grades as metrics, this study determined whether the introduction of this novel mobile technology improved student grades and aided the students in learning the course material. The results indicated that students’ grades improved with the introduction of the iPads, and 78% of the students reported that the iPads facilitated their ability to learn the course material. There was a positive association between frequency of app use and standardized mastery of the course material, as students who used the apps more frequently scored higher and indicated that they felt as though they had learned the material more comprehensively. Owning or having an iPad at home did not have a significant effect on the learning of the material. The general consensus by students was that iPad anatomy apps should be used frequently to better develop student understanding of the course material. Anat Sci Educ 11: 336–345. © 2017 American Association of Anatomists. 相似文献
53.
凤凰卫视《有报天天读》栏目代表了电视读报节目这种新型的电视新闻节目形态的最高水平, 其重要意义在于打破了电视和报纸之间的界限, 符合多媒体信息整合的大趋势, 同时使电视新闻向深度和广度方向拓展。此外该栏目准确的市场定位、个性化的新闻传播等特色也代表着当前电视新闻节目发展的新潮流, 新趋势,并对内地的新闻节目改革提供了借鉴。 相似文献
54.
从实验装置的研制、实验教学组织等方面介绍了在国内率先构建钢框架多功能动载教学实验平台的实施过程,该项实验研究将最先进的实验设备、最前沿的科技成果和工程中的实际问题引入本科生、研究生教学实验之中,开阔了学生的学术视野,收到良好效果。 相似文献
55.
ARandomMultiAccessMethodforDataServicesinCDMACelularSystemLiZhen(李振)YouXiaohu(尤肖虎)(NationalMobileCommunicationsResearchLabor... 相似文献
56.
Nancy L. Williams Karen H. Larwin 《Journal of Research on Technology in Education》2016,48(3):143-158
This study explores the impact of one-to-one computing on student achievement in Ohio high schools as measured by performance on the Ohio Graduation Test (OGT). The sample included 24 treatment schools that were individually paired with a similar control school. An interrupted time series methodology was deployed to examine OGT data over a period of 5 to 8 years. Overall student performance and content-specific achievement in math, reading, science, social studies, and writing were not significantly affected by the introduction of 1:1 computing. Treatment schools using a netbook device produced the greatest overall change in scores. 相似文献
57.
周学文 《内江师范学院学报》2004,19(6):25-28
B/S模式的应用程序主要是集中式计算和处理,本简要的以实例无纸化考试系统设计,说明了在B/S模式中采用分布式计算处理的一种思路。 相似文献
58.
移动机器人构建地图的研究与发展 总被引:8,自引:0,他引:8
系统地综述了移动机器人探测环境构建地图的研究现状,总结了探测环境研究中机器人的自定位、传感技术及其不确定性的补偿和不同性质数据的融合算法,在此基础上分析了该研究领域中存在的问题,并对该研究方向未来的发展趋势进行了展望. 相似文献
59.
60.
走出书斋——浅论移动阅读 总被引:4,自引:0,他引:4
移动阅读是目前新出现的一种阅读方式,这种阅读方式产生的背景是什么,以及对中国而言,移动阅读的普及存在的困难和障碍是什么,本文围绕这两点展开了深入探讨。 相似文献