全文获取类型
收费全文 | 504篇 |
免费 | 1篇 |
国内免费 | 29篇 |
专业分类
教育 | 287篇 |
科学研究 | 42篇 |
体育 | 13篇 |
综合类 | 18篇 |
信息传播 | 174篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 8篇 |
2017年 | 9篇 |
2016年 | 10篇 |
2015年 | 15篇 |
2014年 | 21篇 |
2013年 | 40篇 |
2012年 | 45篇 |
2011年 | 38篇 |
2010年 | 31篇 |
2009年 | 28篇 |
2008年 | 33篇 |
2007年 | 46篇 |
2006年 | 42篇 |
2005年 | 38篇 |
2004年 | 27篇 |
2003年 | 33篇 |
2002年 | 23篇 |
2001年 | 18篇 |
2000年 | 10篇 |
1999年 | 6篇 |
1997年 | 2篇 |
排序方式: 共有534条查询结果,搜索用时 31 毫秒
91.
92.
Online lectures have been used in lieu of live lectures in our gross anatomy and embryology course for the past eight years. We examined patterns of online lecture use by our students and related that use to academic entry measures, gender and examination performance. Detailed access records identified by student were available from server logs. Total views per page of lecture material increased over the first six years, then decreased markedly between years seven and eight, possibly due to the recent availability of alternate forms of lecture audio. Lecture use peaked in midafternoon and again in the evening, although some use was seen at all hours. Usage was highest at midweek and lowest on Fridays as might be expected. Individual student's use varied widely from rates equivalent to less than one viewing/page to more than three viewings per page. Overall use by male students was greater than that of females and gender‐specific differences in the daily pattern were seen. Lecture use was correlated to the Medical College Admission Test® (MCAT®) Verbal Reasoning and Physical Sciences scores but not to composite MCAT scores or undergraduate grade point average. Overall use appeared to be driven by scheduled team‐based learning (TBL) sessions and major examinations. Specific subsets of lecture material were most often viewed before related TBL sessions and again during review for examinations. A small but significant correlation between lecture use and examination and course performance was seen, specifically in the male student population. These findings, along with earlier observations, suggest that varied use of online lectures is attributable to multiple factors. Anat Sci Educ © 2012 American Association of Anatomists. 相似文献
93.
介绍多种方正书版文件转换PDF的方法,从转换条件和适用范围、转换效率、转换后文件尺寸、文件质量等方面对其中四种方法进行对比分析。结果表明:书版2008直接输出法、书版大样—标准PS-PDF法的转换效率高、转换质量好,可实现期刊社与作者的无障碍沟通及数字出版和网络出版的要求。研究结果为期刊社在众多转换方法中选择适合自身需求、软件资源和经济实力的方案提供参考,有助于推动期刊社的数字化和网络化进程。 相似文献
94.
阐述现阶段品牌服装防伪现状及应用二维条码在服装吊牌上的可行性。针对商标图像以色块图为主、颜色少的特点,在对商标图像进行边缘检测、轮廓跟踪及轮廓特征信息提取的基础上,提出了一种商标图像大比例压缩算法,实现将服装吊牌中商标和服装其他特征信息制成一种带PDF417二维条形码的服装吊牌。通过识读出二维条码中的服装文字信息及商标图案和服装吊牌上信息相对比,实现服装吊牌的防伪。 相似文献
95.
There have been calls in the literature for changes to assessment practices in higher education, to increase flexibility and give learners more control over the assessment process. This article explores the possibilities of allowing student choice in the format used to present their work, as a starting point for changing assessment, based on recent studies and current examples of flexible assessment practice in higher education. The benefits of this flexible assessment format approach are highlighted, along with a discussion of classic assessment considerations such as validity, reliability and marking concerns. The role of technology in facilitating assessment method choice is considered, in terms of new opportunities for providing student choice in the way they evidence their learning and present their work. Considerations for implementing flexible assessment choices into the curriculum are presented, along with a call that further research into such practice is needed to develop a comprehensive set of practical recommendations and best practice for the implementation of flexible assessment choice into the curriculum. The article should be of interest to curriculum developers and academics considering implementing changes to the assessment process to increase student ownership and control. 相似文献
96.
惯用语是一种定型结构,它的构成成分一般都是不变的,但数词惯用语,尤其是"一一"对举的数词惯用语结构较为灵活。从《新华惯用语词典》所收的"一一"对举的数词惯用语出发,在惯用语的正体和副体的关系方面讨论惯用语结构的灵活性,以期对惯用语的研究有所裨益。 相似文献
97.
阐述如何巧妙利用Nooog PStoPDF软件中EPS转JPG的功能,配合使用Adobe Acrobat将飞腾EPS文件批量转换为PDF文件的方法。该方法转换速度快、转换效果好,生成的PDF文件占硬盘空间较小,图中文本可进行标记注释,很好地满足了用方正飞腾制作EPS图的科技期刊对插图进行远程校对的需要。 相似文献
98.
教师在道德教育中的作用首先取决于教师本身的道德意识状态。在后现代背景下,基于不同伦理视角的道德概念或道德意识往往成为道德分歧的根源。因此,教师道德意识澄清是适应多元化时代的积极举措和普遍要求,也可以促进对道德教育中一些老问题的再认识。重视道德的外显性与内涵性双层属性,重视道德成长中的精神享受驱动力与"减法式"的过程特征,有助于形成道德教育的纵向开放性和横向包容性的视角。同时,教师道德意识澄清,也需要给予培训和日常机制上的保障。 相似文献
99.
通过"电子文献网络结构技术",来解决国内重点关注的"对开放存取数字全文资源即采、即编、即检管理系统"问题。实现了本地允许保存零散PDF文件的再标引,通过云计算技术实现了对文献题录的时时采集、时时编辑、时时检索。通过PubMed中PMID编号自动链接PDF,实现允许保存的零散PDF电子资源即采、即编、即检管理系统。 相似文献
100.
对对流方程的Lax-Friedrichs格式和Lax-Wendroff格式采取加权策略,给出了对流方程的一种加权显式格式(WLFW格式),进一步通过理论分析给出该格式的局部截断误差和稳定性条件.实验结果表明,WLFW格式可有效地控制数值耗散和数值色散问题. 相似文献