面向开放互联网的多媒体数字版权保护系统

针对数字内容安全和跨平台用户共享的实际需求,提出并实现一种面向开放互联网的多媒体数字版权保护方案及综合化平台原型系统。采用XML语言生成数字权利证书,以证书与用户设备硬件信息绑定的方式,实现受保护内容在Android和Windows平台上的安全播放和使用控制,满足了以上两种平台上基于权利证书的跨平台数字权利分享功能。该方案广泛适用于多媒体音视频数字内容安全平台。     

基于过滤级的语义Web服务发现策略

语义Web与Web services有很强的互补性,在现有技术条件下二者的统一构建了新一代Web服务--语义Web服务.描述了语义Web服务发现的任务,提出了一种基于过滤级的发现策略,最后给出了各级匹配的具体算法.基于过滤级的语义Web服务发现策略明显地缩减了服务匹配的空间,并大大提高了服务发现的时间效率.同时,相关技术还在进一步的研究中.     

非视音频数字内容版权保护系统的设计与实现

针对数字版权管理系统解决方案缺少对非视音频媒体处理的问题,提出一种非视音频数字内容版权保护系统。该系统采用J2EE构架,基于HTTP远程访问、Eclipse RCP等技术,利用PKI平台并结合加密算法,实现资源打包加密、用户授权和许可证管理等功能,用户可对加密数字内容进行阅读、播放和打印。应用证明,该系统能提供一个有效、安全、可信赖的非视音频数字内容支持环境。     

A cooperative framework for integrating ontologies

Nowadays, there are systems and frameworks that support Ontology construction processes. However, ontology integration processes have not sufficiently been specified to date. In this article, by making use of a cooperative philosophy, we describe a real framework for the integration of ontologies supplied by a predetermined set of (expert) users, who may be interconnected through a communication network. This framework is based on a set of well-defined assumptions that guarantee the consistency of the ontology derived from the ontology integration process. Moreover, in the approach presented here, every (expert) user may consult the so-derived ontology constructed until a given moment in order to refine his or her private ontology. In addition to this, the model proposed in this work allows the experts involved in the construction of the ontology to use their own terminology when querying the global ontology obtained until a given instant from their own co-operative work. The validation of the framework is also included in this work.     

基于Petri网的语义Web服务发现框架的研究

针对目前语义Web服务发现研究中存在的不足,提出一种基于Petri网的语义Web服务发现框架.该框架利用OWL-S本体提供的语义信息及Petir网在系统动态行为方面的验证功能,从服务注册中心发现用户所需的服务组合.Web服务的发现结果不仅满足用户的功能需求,而且保证无死锁并能够正确执行,提高了服务发现的准确性.最后通过实例分析验证了该服务发现框架的有效性.     

A distributed digital rights management model for secure information-distribution systems

There is a need to protect digital information content and the associated usage rights from unauthorized access, use, and dissemination. The protection mechanisms should meet the requirements for the correct management of fine-grained access and usage controls and the protection of user privacy. Digital rights management (DRM) solutions have significant relevance in this context. This paper describes a distributed DRM model for a secure information-distribution system consisting of six trust-building blocks. These are (i) the user application, (ii) the authentication and authorization module, (iii) Rights-Carrying and Self-Enforcing Objects (SEOs), (iv) the privacy enforcement module, (v) theUsage Tracking and Monitoring Proxy (UTMP), and (vi) thesecurity infrastructure. SEOs are information objects that carry access and usage rights and are responsible for the fine-grained enforcement of these rights. The security infrastructure plays a pivotal role in the creation, distribution, storage, manipulation, and communication of information objects across organizational boundaries with the required level of security. Our model was originally developed for an Internet-based learning project in Norwegian schools and meets most of the aforementioned requirements.     

A semantic web methodology for situation-aware curative food service recommendation system

Recently curative food is becoming more popular, as more people realize its benefits. Based on the theory of Chinese medicine, food itself is medicine. The curative food which is an ideal nutritious food can help to loss weight, increase immunity and is also good for curative effects in patients. In this paper, we propose a new Curative Food Service （CFS） recommendation system, the designed Situation-aware Curative Food Service Recommendation System （SCFSRS）, which provides the cooperation web-based platform for all related Mobile Users （MUs） and Curative Food Service Providers （CFSPs）, could strengthen the ability of CFS suggestion. SCFSRS is a five-tier system composed of the MUs, UDDI Registries （UDDIRs）, CFSPs, Curative Food Services Server （CFSS）, and Database Server （DS）.     

A digital rights management scheme for broadcast video

Many watermarking techniques have been proposed for digital video and digital broadcast video. In general, they address the seller's or broadcaster's concerns, such as copyright-violation deterrence, copyright-violation detection and copy protection. Some of them provide for data integrity (tamper proofing), which is a shared concern of both subscriber and broadcaster. In all these cases, the watermark generation and embedding is performed or controlled by the seller or broadcaster. Therefore, a broadcaster with malicious intentions could, with manipulation, falsely implicate an innocent subscriber in copyright violation. This could be a major concern for subscribers. In this paper, we propose an integrated solution to manage the broadcaster's copyright and subscriber's false-implication concern (subscriber's rights) for digital video broadcasts. The proposed novel approach makes use of interactive watermarking techniques and protocols to help protect digital rights of all parties involved in video broadcasting.     

A robust and flexible digital rights management system for home networks

A robust and flexible Digital Rights Management system for home networks is presented. In the proposed system, the central authority delegates its authorization right to the local manager in a home network by issuing a proxy certificate, and the local manager flexibly controls the access rights of home devices on digital contents with its proxy certificate. Furthermore, the proposed system provides a temporary accessing facility for external devices and achieves strong privacy for home devices. For the validation of delegated rights and the revocation of compromised local managers, a hybrid mechanism combining OCSP validation and periodic renewal of proxy certificates is also presented.     

基于语义的Web服务发现算法优化

服务发现的精确度和对服务请求者的响应速度随着发布的Web服务的数量增多显得日益重要.确保服务发现精度的同时,提出一种改进服务匹配的算法即服务发现提前匹配算法,通过有效地利用已计算出来的匹配程度的信息以减少匹配操作,缩短对请求者的响应时间.为了能及时地更新和删除过时的服务,通过改进相应的数据存储结构,提出了一种维护服务的算法,并进行了相关的理论和实验上的性能分析.实验结果表明算法在很大程度上缩短了对服务请求的响应时间.     

Taking the copyfight online: Comparing the copyright debate in congressional hearings,in newspapers,and on the web

This article examines the rhetoric around copyright and the regulation of digital rights management (DRM) from 2003 to 2006 in congressional hearings, in major newspapers, and on the most prominent relevant websites. The article describes a new combination of methods for identifying a set of online documents to compare with offline documents via content analysis. These three media present very different views of the copyright debate. Hearings present a rough balance of both coalitions' messages. Newspapers lean slightly toward stronger fair use but have little coverage. The online debate features a deluge of strong fair use arguments. These findings highlight different communication strategies and suggest broader lessons about the changing nature of policy advocacy and the policymaking process.     

语义网服务中的本体综述

作为实现下一代Web的集成方案,语义网服务将语义Web技术和Web服务技术相结合,以支持Web服务的自动发现、选择、合成和执行.本体是语义网服务的理论基础.介绍了Web资源描述本体OWL和Web服务描述本体的概况,并对3种主流的Web服务语义描述框架进行对比分析,为语义网服务中本体的创建提供基础知识.研究了语义网服务中存在的各层次的本体异构问题,明确了语义网服务中本体集成的主要研究方向.     

一种支持QoS的语义Web服务发现框架研究

随着Web服务的广泛使用,Web服务的发现机制显得尤为重要.现有的Web服务发现方法,因缺乏对服务质量(QoS)的描述而难以为用户选择最佳服务.主要提出一种考虑QoS的语义Web服务发现框架,采用分类和反馈机制,及相应的匹配级别和过滤机制,以便用户查找到与自己需求最接近的服务,提高服务的查找率.     

基于语义描述的Web服务工作流集成

Web服务是可以由其它软件在Internet上访问的一种软件接口。Web服务工作流则是一组按一定顺序执行的Web服务的集合。如何集成一个Web服务工作流,特别是如何运用对Web服务的语义描述来为一个工作流来自动寻找和匹配Web服务,这是目前所急需解决的问题。介绍如何用语义Web服务本体论来集成工作流,同时提出一个基于语义Web服务工作流集成的模型。     

语义Web上的Ontology表示语言研究

本体在语义Web中起着重要的作用，它能为软件Agent提供从语法层次到语义层次上的互操作性。在需求与技术的驱动下，多种本体表示语言也应运而生。介绍了3种本体表示语言（RDF Schema、DAML＋OIL、OWL），并对它们进行了比较分析。     

基于语义的动态服务组合的改进

Web服务应用已经广泛深入,而已存在的服务也越来越不满足客户的需求,解决应用服务之间的共享和应用协作问题成为关键.基于语义的Web服务的动态组合无疑可以很好的解决这个问题,但是OWL-S还有许多方面需要完善特别是在服务质量、花费、可靠性等问题上.本论文通过对OWL-S的扩充解决了其中部分问题,并且通过描述并实现一个动态服务组合框架来验证.     

语义网关键技术概述

语义网是对WWW的延伸,其目标是使得Web上的信息具有计算机可以理解的语义,并为人们提供各种智能服务.在介绍语义网概念及其体系结构的基础上,对3大关键技术:XML、RDF、Ontology作一简要的概述,讨论了其要解决的主要问题.在把握当前研究现状的基础上,明确今后主要的研究方向与重点问题.     

基于语义Web的空间信息共享服务

存取、交换、集成空间信息是Web应用研究的热点之一。然而,Web是设计为人使用的,人们必须浏览、理解、选择和导航Web信息。此外,由于数据间的语义冲突和缺乏集成存取共享的空间信息的工具,空间信息很难得到利用。利用语义Web技术和常用本体,提出了查找互联网上的空间信息的方法。首先介绍了语义Web的主要概念;其次描述了语义冲突解决本体;最后详细地探讨了如何在语义Web上实现空间信息共享服务。     

基于语义Web的LBS平台研究

移动位置服务近年来发展迅速,然而当前的LBS平台对动态空间信息的存取、交换、集成方式都不尽相同,异构平台之间的内容共享与交互也存在一些缺陷.重点讨论了LBS应用如何利于语义Web和本体技术从不同领域中获取动态空间信息,设计了基于语义Web的LBS平台架构,并在此基础上实现了一个语义LBS平台原型.     

A web services framework for distributed model management

Distributed model management aims to support the wide-spread sharing and usage of decision support models. Web services is a promising technology for supporting distributed model management activities such as model creation and delivery, model composition, model execution and model maintenance to fulfill dynamic decision-support and problem solving requests. We propose a web services based framework for model management (called MM-WS) to support various activities of the model management life cycle. The framework is based on the recently proposed Integrated Service Planning and Execution (ISP & E) approach for web services integration. We discuss encoding of domain knowledge (as individual models) and utilize the MM-WS framework to interleave synthesis of composite models with their execution. A prototypical implementation with an example is used to illustrate the utility of the framework to enable distributed model management and knowledge integration. Benefits and issues of using the framework to support model-based decision-making in organizational contexts are outlined.