“小设置 大作用”之网页作品教学评价设计

设计合理、实施恰当的评价是有效教学的有机组成部分,对信息技术的学习具有较强的导向作用,是提高信息技术教学质量的关键环节.讲授高一<信息技术基础(必修)>第六章"网页的设计和制作"时,怎样能够展示学生的网页作品,让所有同学都能快速浏览到网页作品,互相比较、求同存异,使学生在制作网页作品中既能体现学生个性又能体现创新精神,这是值得思考的.     

网页设计与制作教学平台的设计与开发

网页设计与制作作为高等学校计算机基础教育的主干课程之一,实践性非常强,在教学过程中需要与实际接轨的教学平台支撑。通过结合FTP服务平台和Web服务平台,建立了网页设计与制作课程的教学平台。通过对FTP服务器的扩展开发,能够批量地增加FTP服务器用户,同时自动生成前端的学生上传作品的展示界面。教学平台使得学生能够实际体验网站从开发到发布的完整过程,为班级教学提供了良好的基础。     

基于互联网搜索与反馈验证的图像自动标注

基于网页的图像自动标注存在图像与文本的关联假设问题,而基于内容的方法则存在数据规模小的问题。为此,将基于内容和基于网页的自动标注方法相结合,提出基于互联网搜索和反馈验证的图像自动标注方法。利用网页关联文本从互联网搜索结果中提取候选标注词,根据候选标注词在搜索得到图片的内容特征进行反馈验证。实验结果表明,该方法具有大规模标注能力,准确率比基于网页的图像自动标注方法提高了7.92%。     

基于内容的中文网页自动分类研究

本文主要介绍基于内容的网页自动分类系统,具体介绍了类别词典的建造方法,网页超文本类别词切分的方法,中文网页自动分类算法以及利用类别词与网页间的模糊关系对网页文本进行自动分类等内容.通过对旅游网页进行测试,自动分类正确率可达93.37%以上,有效地提高了查准率和查全率.     

基于RSOM-Bayes的网页分类方法

针对向量空间模型的网页分类计算复杂度高、不适用于大规模场景问题,该文采用RSOM和BAYES相结合的方法实现网页分类,利用RSOM 神经网络树实现网页特征词的自动索引,利用Bayes实现网页的自动分类。结果证明其在特征空间维数、检索效率、样本容量及检索精度方面都具有良好的性能。     

《网页制作》专题学习网站的设计与实现

专题学习网站是基于网络资源的数字化学习平台,为学生提供制作网页所需的丰富资源,搭建展示学生作品成果的平台。     

中文网页分类中的网页特征提取方法

为了网页信息的有效组织和检索,针对网页中的超文本结构特征,在研究网页间的超链接、超文本标记对信息提取的作用的基础上,阐述了一种基于“超文本标记加权”和“超链接森林”的因特网信息提取方法,并与传统方法进行了对比。实验结果表明,该方法用于网页的自动分类具有较好的效果。     

基于机器学习的网页主题词自动抽取

主题词在信息处理和信息检索过程中有广泛的用途，然而大量网页没有主题词，手工抽取主题词是一个繁重的过程，可以将主题词自动抽取看作是分类问题，充分利用网页的结构信息并且使用有监督的机器学习方法来自动地抽取网页中的主题词，试验结果表明该算法具有实用的价值。     

网页自动分类的建模与仿真研究

研究网页自动分类是为快速找到用户所需网页.由于网络中网页数量相当大,而且网络是一种半结构化、海量、高维等文本,传统文本分类方法无法进行降维和消除冗余信息,易出现维数灾问题,网页分类准确率低,用户很难找到自己所需网页.为了提高网页分类准确率,提出基于主成分支持向量机的网页自动分类方法.首先对网页数据进行预处理,提取网页特...     

NQPC:一种新型的基于查询日志的网页分类方法

网页分类可对海量网页进行分门别类,可应用于许多方面。现存的网页自动分类方法较多,其中常用的基于网页内容的方法由于网页内容的不纯,导致其存在较大的性能提升空间。基于查询日志,提出了一种新型的网页分类方法NQPC。该方法提出一种低维特征向量抽取方法,从而避免"维度灾难";基于优质的查询日志进行网页分类,查询日志相对网页内容而言,具有内容较纯的优点;提出一种提升分类准确率的过滤方法。实验结果表明,提出的网页分类方法具有优异的性能表现,使其具有良好的应用前景。     

A new programming environment with a multi-display terminal and early experiences with it

The authors have developed an extended intelligent terminal system MDPS with four CRT displays controlled by microprocessors and with useful programming tools in order to achieve a high-level programming environment. The system is based on the fact that reference to, comparison among, and utilization of various kinds of information are the basic but essential actions in the programming environment. Users can arrange various kinds of information spatially using simple concepts “text” and “page” of MDPS. MDPS has several advantages over conventional terminal systems.     

A taxonomy for and analysis of multi-person-display ecosystems

Interactive displays are increasingly being distributed in a broad spectrum of everyday life environments: they have very diverse form factors and portability characteristics, support a variety of interaction techniques, and can be used by a variable number of people. The coupling of multiple displays creates an interactive “ecosystem of displays”. Such an ecosystem is suitable for particular social contexts, which in turn generates novel settings for communication and performance and challenges in ownership. This paper aims at providing a design space that can inform the designers of such ecosystems. To this end, we provide a taxonomy that builds on the size of the ecosystem and on the degree of individual engagement as dimensions. We recognize areas where physical constraints imply certain kinds of social engagement, versus other areas where further work on interaction techniques for coupling displays can open new design spaces.     

The multimodal world of medical monitoring displays

A vision of the future of intraoperative monitoring for anesthesia is presented-a multimodal world based on advanced sensing capabilities. I explore progress towards this vision, outlining the general nature of the anesthetist's monitoring task and the dangers of attentional capture. Research in attention indicates different kinds of attentional control, such as endogenous and exogenous orienting, which are critical to how awareness of patient state is maintained, but which may work differently across different modalities. Four kinds of medical monitoring displays are surveyed: (1) integrated visual displays, (2) head-mounted displays, (3) advanced auditory displays and (4) auditory alarms. Achievements and challenges in each area are outlined. In future research, we should focus more clearly on identifying anesthetists' information needs and we should develop models of attention in different modalities and across different modalities that are more capable of guiding design.     

Large-display developments in China

In China, various kinds of displays have been developed in recent years. Normal displays, i.e. on-off type displays such as LED and electromagnetic displays, have been used in many places. These have formed the main display modes in China. Another significant development has been the appearance of giant video displays. The first system has been installed in Xiannongtan Stadium in Beijing. It was used during the opening ceremony of the First Farmer Games of the People's Republic of China, and is intended for further use at the 11th Asian Games to be held in 1990.     

Colour design in aviation cartography

The use of colour in maps from the earliest times to the present day is reviewed, and that experience is applied to the problems of airborne map displays. Studies of the priorities of various kinds of map information have been carried out. A set of principles and guidelines for the best use of colour in airborne map displays is given.     

基于MATLAB的语谱图显示与分析

文章给出了一种基于MATLAB的语谱图显示原理及实现方法。该法可对语音信号(或其它类型的似平稳信号)进行频谱图的伪彩色映射及显示。语谱图的类型有宽带和窄带两种,可按需求设置伪彩色显示的映射。文中介绍了语谱图显示的原理,MATLAB的相关功能函数,并给出了一个程序实例及其实验结果。在MATLAB中进行了仿真,结果表明宽带及窄带语谱图对时间分辨率和频率分辨率的不同反映并且该法对设备要求低,编程简单,可以在普通通用计算机上实现。     

Do grables enable the extraction of quantitative information better than pure graphs or tables?

Previous research is equivocal regarding the most effective methods of presenting quantitative information displays. The differences in results may be due to numerous reasons including the display and inquiry type. This study examines several methods of displaying quantitative information (e.g., line graphs, line grables, bar charts, bar grables, tables, pie charts and pie grables) that were factorially crossed with different kinds of data extraction inquiries (i.e., questions about exact numerical quantities, comparisons, and trends). Grables are displays that combines features of graphs and tables including specific numerical information with each graphically presented category. Results showed that tables, bar grables and line grables produced the fewest errors, and line graphs and bar charts produced the fastest responses across question types. Error rates combining the accuracy and time (i.e., errors/s) were lowest for the three grables and table. Results are discussed with respect to prior theoretical work and the potential benefits of hybrid forms of quantitative displays for multiple kinds of data extraction inquiries.

Relevance to industry

Choosing the best method of displaying information is important for effective decision making. This study evaluates seven types of graphical displays to answer three types of inquiries. Results indicate that in general, the most efficient data extraction (fewest errors per unit time) were produced using grable or table displays across question types. The appropriate display fosters better communication of information.     

数字化网络温、湿度监测系统在粮库中的应用

数字化网络温湿度粮情监溯系统是集温度、湿度、病虫、PH3以及自动排风控制等多功能的全数字化网络测控系统.该系统以不定时方式检测数据、实现数据实时采集、显示、存储以及远程传输;根据仓储管理的要求及时生成各种类型的图表、数据报表和曲线;可显示、打印和保存采集资料.系统还可随时查阅历史数据,进行仓储粮情分析.该系统是集数据、...     

EDIT—an interactive network service; design and implementation

EDIT is a time-sharing system which offers interactive services over the NPL network. These services include various kinds of editing, word processing, data movement and file control. The system is implemented on a PDP11/40 and can serve up to 30 users simultaneously, on high-speed displays and other terminals. There is an attached background processor (PDP11/45) which supports graphics and background jobs. This paper describes the design and implementation of EDIT and relates this to the needs of the system and of its users.     

一种基于分块树的手写数学公式结构分析算法

本文源于一个手写数学公式识别系统,该系统实现了手写数学公式到文本公式的自动转化。文中提出了一种基于分块树的数学公式结构分析方法,该方法首先根据其内部结构特征将数学表达式分解为若干子模块,并采用树型结构对每个子模块内部字符之间的结构关系进行表示,最终形成整个表达式的树型表示。该方法定义了一系列的字符结构属性,将字符及属性值作为结构分析的结果,这些属性值再现了公式的结构特征,并很容易被系统的公式文本显示部分所利用。另外,该方法对传统的字符空间关系类型进行了简化,减小了识别误差,而引入的分块处理方式更加适合具有根式和分式等多层嵌套结构公式的处理,并且具有较强的可扩展性。