Web挖掘研究

介绍了Web挖掘的任务和分类;讨论了Web的内容挖掘、结构挖掘和使用记录挖掘。     

An eight‐year study of online lecture use in a medical gross anatomy and embryology course

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.     

课件录播系统的图像识别跟踪技术

本文介绍课件录播系统的图像识别跟踪技术原理,并通过与其它常用跟踪技术的比较,使大家认识图像识别跟踪技术的应用优势和在应用中的注意事项,以供选购参考。     

学术期刊参考文献著录存在的问题与对策

关于参考文献的标准化、规范化,我国制定了一系列有关标准。但至今,不少的论文著录仍然存在一些不容忽略的问题。如：主要责任者、其他责任者著录;题名及其他题名著录;出版项著录;析出文献著录;标志符号著录以及电子文献的著录等问题。加强参考文献著录规范的措施与对策,可从作者与编辑、编辑部两个层面来考虑：要提高作者对参考文献的作用以及意义的认识;对作者进行宣传、教育与培训,编辑要端正态度,加强业务学习,提高编辑水平;增强审稿专家的文献规范意识和把关能力。     

卫星宽带视频资源教学系统在暨南大学的应用与实践

根据视频资源建设的需要,提出建设卫星宽带多媒体教学系统的必要性。从系统的设计出发,介绍系统的前端、控制端、终端、网络设计,直播和点播功能实现的关键技术,如P2P技术、IP网络视频流录制技术和网络在线视频编辑处理技术,以及系统的应用状况和应用过程中出现的问题,以期推动教学信息化的发展。     

Components, systems and discontinuities: The case of magnetic recording and playback equipment

Using the history of magnetic recording and playback equipment, this paper explores the relationship between incremental improvements in components and technological discontinuities in systems. It finds that improvements in components have been the major source of all discontinuities in the industry. Focusing just on tape-based systems, all of the basic design approaches had been identified by the late 1950s and thus one of the largest technological challenges for firms has been to modify the design in response to improvements in the magnetic recording density of tape. This paper explores this phenomenon by analyzing data on equipment performance and price, and several design choices for the tape-based equipment. It shows how improvements in the magnetic recording density have changed the tradeoffs that exist between price and different dimensions of performance and between various design choices and thus led to about 10 technological discontinuities in magnetic tape system design.     

科技论文参考文献的著录原则及编辑方法

阐述科技论文参考文献约著录原则；指出科技期刊文中存在的问题，并给出编辑方法。     

基于局域网的数字监控系统应用

对所设计的数字监控系统的技术规格、设计原则、特点和工作原理进行了说明、此系统具有录像、报警、网络等功能．     

初吉月首说

正确认识古人的纪时辞例是理解初吉含义的前提。中国古代的纪时采用“定点＋干支”的结构，初吉首先是一个定点。结合它与其它月相名词配合使用的事实，它应是哉生霸的代名词，它本身不是月相术语，朔出现后，它转而成为朔的代名词，所以后人用朔解释它，总之，初吉是月首，当天文学不发达时，人们以哉生霸为月首，后来人们又知道了月道应是逆，初吉的含义本身有个变化过程。     

录像手段对普通高校男生110m栏主要技术的评判

通过录像方法对福建普通高校公体与体专优秀110m栏运动员的技术动作进行研究。经过分析得出以下结论：体专运动员技术较为合理;公体运动员在技术上的差距表现为起跨腿向前提拉晚,造成膝盖碰撞或刮倒栏架,过栏时间较长,过栏时腾空过高造成“跳栏”,栏间跑节奏不稳,未能三步跑完全程。建议：改善起跨腿技术、解决起跨距离、掌握好栏间跑节奏,提高教学水平和比赛成绩。