基于HyTime的超媒体文档系统的一种实现方法

超媒体文档由一系列结构化的信息组成,这些信息包含不同类型的媒体,传统的文档系统描述这些信息比较困难,ＨｙＴｉｍｅ标准作为ＳＧＭＬ的一个应用不仅能够描述超媒体文档的结构,耐用能描述不同媒体之间的同步关系,ＨｙＴｉｍｅ的主要缺点是非常复杂,不容易用软件实现全部模块的功能,文中提出了一种采用３层模型来实现符合ＨｙＴｉｍｅ标准的超媒体文档系统的方法,并用此模型实现了一个超媒体文档浏览系统。     

基于HyTime的超媒体文档系统研究

超媒体文档系统不仅要求支持离散媒体（例如文本和静止图象）和连续媒体（例如声音和视频）等信息。而且要描述不同媒体之间的同步关系。为实现这样的超媒体文档系统,采用ＳＧＭＬ和ＨｙＴｉｍｅ文档标准来描述各种单一媒体之间的时空关系,主要讨论基于ＳＧＭＬ和ＨｙＴｉｍｅ标准的超本文档系统的实现问题。     

超媒体著作系统OOHAS中的对象设计

OOHAS是结合面向对象技术设计并实现的一个超媒体著作系统。本文详细介绍了系统中所定义的各种不同层次的对象操作，并分析了由这些对象构造超媒体文档的能力和特点。     

CCHMDBS：一个分布协作超媒体中文文档库写作系统

本文阐述了一个面向大容量超媒体中文文档协作写作系统的主要设计思想和实现。着重介绍了系统的新一代超媒体系统特征和核心技术，如超链自动链接技术，超媒体系统的中文处理技术尤其是中文检索技术，分布与协作写作技术，文档目录可视化组织管理技术等。     

基于XSL转换超媒体课件文档的研究与实现

基于XSL的转换技术提供了强大的机制和功能,可以实现多种文件变换.它具有部分高级编程语言的特征,因而利用XSL可以方便灵活地转换异构的超媒体XML文档.文中介绍了一个利用XML技术的超媒体课件系统,该系统使用XML保存课件内容,利用XSL来重新组织课件和指示课件对外表示的模式或风格,根据超媒体课件在不同场合不同情况下根据要求展现不同的外在风格和形式.通过应用XML及其XSL的超媒体文档格式转换,描述了基于XSL对超媒体课件文档的转换应用,并实现了基于XML的超媒体课件系统.     

基于XSL转换超媒体课件文档的研究与实现

基于XSL的转换技术提供了强大的机制和功能,可以实现多种文件变换。它具有部分高级编程语言的特征,因而利用XSL可以方便灵活地转换异构的超媒体XML文档。文中介绍了一个利用XML技术的超媒体课件系统,该系统使用XML保存课件内容,利用XSL来重新组织课件和指示课件对外表示的模式或风格,根据超媒体课件在不同场合不同情况下根据要求展现不同的外在风格和形式。通过应用XML及其XSL的超媒体文档格式转换,描述了基于XSL对超媒体课件文档的转换应用,并实现了基于XML的超媒体课件系统。     

一种自适应超媒体教学课件的组织方法

讨论了一种教学超媒体课件的组织方法：围绕概念组织课件，概念由文档的集合解释。概念之间的链表示语义间的相互联系，文档和链的信息存储在数据库里，每个文档有相应的难度级别。系统根据学对每个概念掌握的情况信息，引导学生到合适的文档处学习。     

超媒体文档库协作写作系统的数据结构设计

本文主要讨论了一个面向大容量超媒体中文文档库的分布协作写作系统的数据和结构模型设计，着重介绍了分布式文档库、文档目录树、节点和超链链表、多媒体对象、文档检索索引等数据结构和整个超媒体系统的结构模型.     

增强超媒体系统的导游功能

对现有超媒体系统中常用的几种导游机制进行了介绍和分析.借鉴PFNET(pathfinder网)这种网状模型，根据超媒体系统中的节点、链和用户使用习惯，提出了两类导游图，以期对用户浏览信息起到真正的导游作用，解决超媒体系统中的迷路问题.     

超媒体文档系统的用户界面设计及热标处理

用户界面设计及热处理是超媒体文档系统中的一个极为重要的内容，设计的内容将直接影响软件的质量，文章介绍了超媒体当系统中有用户界面的设计问题，热标的概念及热标处理中的一些问题。     

Supporting Hypermedia Services in the User Interface

This paper presents an architecture for developing hypermedia systems in which hypermedia services are provided primarily through the interface and hypermedia components of an application. The architecture relieves the application component and its developers from the issues associated with hypermedia. It also allows a common hypermedia engine and interface to be used in multiple applications to present a consistent view of a hypermedia model. A prototype of the architecture is presented with examples of the hypermedia facilities which can be provided. The discussion associated with the prototype demonstrates that many of the common features of pure hypermedia systems can be supported. Limitations and future research issues also are discussed.     

基于Petri网超媒体模型的分析与比较

超媒体建模研究是当前一个重要研究方向。基于Petri网理论的模型是对有向图模型的改进,与其他模型比较,能够更好地刻画超媒体系统。原因如下:Petri网是一个二部有向图,适合于说明超媒体的链接机制;Petri网是一种天然的具有并行执行语义的自动机,模型可以自然地表达超媒体系统中的动态执行语义;Petri网能够说明各种顺序、并发和同步活动,满足描述多媒体表现的需要;利用Petri网的图形特性和严格的数学基础,人们可以检查和分析超媒体中的潜在问题。该文着重对四个典型的基于Petri网的超媒体模型:MHPN、HCPN、MORENA和HTSPN模型进行分析和比较。     

Adaptive Hypermedia

Adaptive hypermedia is a relatively new direction of research on the crossroads of hypermedia and user modeling. Adaptive hypermedia systems build a model of the goals, preferences and knowledge of each individual user, and use this model throughout the interaction with the user, in order to adapt to the needs of that user. The goal of this paper is to present the state of the art in adaptive hypermedia at the eve of the year 2000, and to highlight some prospects for the future. This paper attempts to serve both the newcomers and the experts in the area of adaptive hypermedia by building on an earlier comprehensive review (Brusilovsky, 1996; Brusilovsky, 1998).     

基于面向对象技术的多媒体开发工具YH－MMDT

ＹＨ－ＭＭＤＴ（ＭｕｌｔｉＭｅｄｉａＤｅｖｅｌｏｐｍｅｎｔＴｏｏｌｋｉｔ）是针对多媒体作品的特点，并基于面向对象技术而设计的一个多媒体开发工具包。我们提出了一个新的多媒体作品管理模型ＷＮＣＨ，该模型以作者／读者辩证统一的观点为基本观点，以结点对象为基本信息单位，以内容对象处理多媒体信息，以热区对象处理超链接功能，进而形成了一组完整的多媒体开发工具。本文首先分析了多媒体作品的特点，然后介绍了ＹＨ－ＭＭＤＴ的体系结构，并详细描述了超媒体作品管理模型ＷＮＣＨ，最后讨论了ＹＨ－ＭＭＤＴ系统的主要管理功能（如创作、阅读、导航等）和技术。     

Storing user experiences in mixed reality using hypermedia

This paper describes HyperMem, a system to store and replay user experiences in mixed environments. The experience is stored as a set of hypermedia nodes and links, with the information that was displayed along with the video of the real world that was navigated. It uses a generic hypermedia model, implemented as software components, to handle mixed reality environments. This model includes components for storing and replaying experiences and integrating them in the overall set of hypermedia graphs that can be accessed by a given user. The paper presents the goals of the system, the underlying hypermedia model, the application scenarios, and the architecture and tools for replaying and repurposing stored information.     

Automating Hypermedia for Decision Support

Many ‘first generation’ hypermedia systems were designed to support applications, which do not require the dynamic and general characteristics necessary for our domain --- decision support systems (DSS). The heart of our research is a dynamic model of hypermedia incorporating virtual structures and computation, which we call generalized hypermedia. Generalized hypermedia broadens and automates the ‘static’ or non-virtual notion of first generation hypermedia for a knowledge-based DSS shell. The shell provides a hypermedia-style interface for navigating among DSS application models, data and reports. Such a shell should support applications in a variety of fields, e.g., engineering, manufacturing, finance, and therefore must provide hypermedia support as general, system-level functionality Generalized hypermedia superimposes a hypermedia network on a DSS application, generating all hypermedia nodes, links and link markers dynamically from the application's standard, non-hypermedia knowledge base. In this paper we demonstrate how automating hypermedia can enhance decision making with a DSS. We describe generalized hypermedia and discuss the challenges presented to it by a dynamic, real-time environment.     

一个动态超媒体映射引擎

文章首先介绍了传统应用软件和超媒体应用软件的差异,指出了超媒体应用系统的特征和对最终用户的吸引力.在此基础上,建立了一个动态超媒体映射引擎的模型,它可以透明地为大多数传统应用系统增加超媒体的界面.文章最后给出了在WWW上实现的一个DHyME(dynamic hypermedia mapping engine)实例.     

CAI中的智能超媒体技术研究

将智能化行为引入到超媒体系统中,在超媒体的链和结点中嵌入知识或规则,允许链进行计算和推理,使链具有动态跟踪与动态引导功能,使得媒体信息具有更丰富的表现特性,这是智能超媒体的主要研究的内容。文章探讨了智能超媒体的相关实现技术,建立了ＣＡＩ领域的相关知识与推理模型,设计与实现了网上多媒体ＣＡＩ系统中的智能超媒体功能。     

Personalization in an interactive learning environment through a virtual character

Traditional hypermedia applications present the same content and provide identical navigational support to all users. Adaptive Hypermedia Systems (AHS) make it possible to construct personalized presentations to each user, according to preferences and needs identified. We present in this paper an alternative approach to educational AHS where a virtual character personalizes the interaction with the user through the use of a particular recommender system. The character has natural language communication abilities; it can learn students’ profiles and use this knowledge to recommend appropriate contents and activities. Through its interaction with the user, the character is able to collect and organize information about students in order to identify appropriate suggestions of contents. The recommender system employs a knowledge representation scheme that is easy to understand and to modify, enabling teachers/tutors to explore the types of recommendations being made and to appreciate why they are made. An experiment with computer science students was carried out in order to validate the approach proposed. The results of the experiment showed that the presentation of personalized links through a virtual character had a positive impact in the users’ perception of the system as a learning tool. The combination of the virtual character with a recommender system proved to be a good alternative for the delivery of personalized contents without making constant changes in the main user interface. This approach provides mechanisms to guide users through paths of study followed by students with similar profiles, without violating the human–computer interaction principle of perceived stability.     

Virtual Architecture Based on a Binary Relational Model: A Museum Hypermedia Application

This paper reviews claims made for virtual architectures and proposes a semantic data model for hypermedia architecture. Semantic modelling, and an extended binary relational model in particular, are outlined in the context of hypermedia. The binary relational store is a simple, uniform data structure, capable of representing abstraction in the application model. Pilot implementations of museum hypermedia systems demonstrate that the architecture is capable of supporting a variety of navigation techniques and authoring tools. We outline the SHIC (Social History and Industrial Classification) museum classification schema, and discuss its implementation in a hypermedia system based on a binary relational store. We reflect on our experiences with the prototypes and discuss feedback from the museum profession and general public. We believe that an extended binary relational model is particularly suited to certain forms of reasoning based on generalisation.