决策树技术在移动学习性别差异研究中的应用   总被引：1，自引：0，他引：1  

王慧敏  陈泽宇  王敏娟  张弛 《现代教育技术》2009,19(5):30-33

基于对近千名高等教育移动学习者进行大规模调查所收集到的数据,研究者使用C5.0算法分别生成男女生群体关于课件使用满意度的决策树,然后比较从中提取的不满意规则进行性别差异研究。实验结果表明:在移动学习中,女生对学习资料有更高的要求,女生对学习资料要求的个体差异高于男生,女生使用课件时更容易受外界因素干扰。  相似文献   

移动无线网络中TCP协议改进研究     

刘纯丽 《池州师专学报》2009,(6)

TCP是Internet最常见的传输控制协议。本文首先介绍TCP协议的传输控制原理;然后讨论为什么传统TCP协议不适合移动无线网络,并分析移动无线网络中改善TCP协议的三种典型方法;最后总结出针对移动无线网络TCP协议改进的思路。  相似文献   

3G时代基于手机媒体的数字化学习探索     

刘紫薇  肖灵君 《教育技术导刊》2009,8(8):140-141

通过对新兴的3G网络技术的概括阐述,以及对3G目前发展出的各种服务项目的介绍,侧重于手机媒体在发展中对学习观念、学习模式等方面的变化,注重了对学习方式带来变革的分析。  相似文献   

Efficient page layout analysis on small devices     

Eun-jung Han  Chee-onn Wong  Kee-chul Jung  Kyung-ho Lee  Eun-yi Kim 《浙江大学学报(A卷英文版)》2009,10(6):800-804

Previously we have designed and implemented new image browsing facilities to support effective offiine image contents on mobile devices with limited capabilities： low bandwidth, small display, and slow processing. In this letter, we fulfill the automatic production of cartoon contents fitting small-screen display, and introduce a clustering method useful for various types of cartoon images as a prerequisite stage for preserving semantic meaning. The usage of neural networks is to properly cut the various forms of pages. Texture information that is useful for grayscale image segmentation gives us a good clue for page layout analysis using the multilayer perceptron （MLP） based x-y recursive algorithm. We also automatically frame the segment MLP using agglomerative segmentation. Our experimental results show that the combined approaches yield good results of segmentation for several cartoons.  相似文献   

移动的书海：国内移动图书馆现状及发展趋势   总被引：13，自引：2，他引：11  

宋恩梅  袁琳 《中国图书馆学报》2010,36(5)

随着无线网络的普及应用,移动图书馆作为一种新型的图书馆服务方式正日益受到关注,其发展表现出明显的项目应用与理论研究并重的特点。国内移动图书馆始于2000年之后,2005年进入集中发展阶段,目前业务功能主要包括短信服务、WAP网站等。由于受推广方式的局限,用户对于移动图书馆的服务知晓程度不高。除了移动运营商和网络信息技术公司外,以图书馆、数据库生产商等为代表的内容提供方将成为移动图书馆服务平台开发的主导者。图8。表2。参考文献28。  相似文献   

3G环境下高校图书馆参考咨询服务   总被引：2，自引：0，他引：2  

冯芳芳 《高校图书馆工作》2010,30(6):73-75

分析了3G使用现状,特别是高校群体使用3G的现状和前景,指出了当前高校参考咨询工作的优缺点,在此基础上提出了3G与高校的参考咨询工作结合的具体措施。参考文献9。  相似文献   

借鉴手机报创办高校短信图书馆   总被引：1，自引：0，他引：1  

林春田  唐雷 《图书馆建设》2010,(2)

在传统图书馆生存受到威胁的大环境下,手机报给高校图书馆的延伸服务以启示。高校图书馆可以利用馆内的馆藏资源和具有各专业背景的人力资源编辑短信,依托通讯运营商,使用SMS技术,通过单向、双向、多向等发送方式发送具有高校特色的专题短信给校园内的手机用户,让学术进驻校园手机。短信图书馆既提升了校园文化建设的品位,又为高校图书馆发展提供了一条崭新的技术思路。  相似文献   

关于手机图书馆服务农村居民的思考     

兰艳花 《数字图书馆论坛》2010,(11):33-37

手机图书馆是数字化环境下图书馆开展泛在服务的一种新型模式,具有潜在的应用价值。参文章试图对手机图书馆服务农村居民的必要性和可行性进行若干分析,最后拟建服务农村居民的手机图书馆系统并提出相关实施建议。  相似文献   

Community-based surveillance to monitor trends in unaccompanied and separated children in eastern DRC     

《Child abuse & neglect》2015

Children who are separated from their families and usual caregivers in emergencies face a multitude of risks. The humanitarian community lacks methods to systematically capture changes in the frequency and nature of such separations over time. A mobile phone-based community surveillance system was piloted in the Democratic Republic of the Congo. The goal was to identify new cases of unaccompanied and separated children on a weekly basis. Over an 11-week period, community focal points reported 62 cases of separation across 10 communities. The majority of children had been under the care of their parents prior to separation. More than half of the children were unaccompanied, meaning that they were living without an adult relative or customary caregiver. The pilot results suggest that implementing a mobile phone-based surveillance system in a humanitarian setting may be feasible and cost-effective and fills a critical gap in the measurement of separated and unaccompanied children in emergencies. A longer pilot to better understand how the system performs over time is recommended.  相似文献   

Where is the learning in mobile technologies for learning?     

《Contemporary educational psychology》2020

Mobile technology – such as tablets, cell phones, and wearable devices – has the potential to play a useful role in promoting academic learning. This potential motivates this special issue on “Mobile Technology, Learning, and Achievement: Advances in Understanding and Measuring the Role of Mobile Technology in Education” edited by Matthew L. Bernacki, Jeffrey Greene, and Helen Crompton. Research on learning with mobile technology should focus on three research questions: Do students learn academic content better with mobile technology than with conventional media (media comparison question)? Which instructional features afforded by mobile technology cause learning (instructional method question)? Under what conditions do students learn academic content better with mobile technology than with conventional media (boundary condition question)? A research agenda is proposed.  相似文献