Toward the Next Generation of Data Modeling Tools

This paper describes the Update Protocol Model (UPM), a formal language for the expression of database update semantics. UPM has been used primarily to capture and communicate in a precise and uniform notation the plethora of database semantics described by a variety of "fourth generation" models, many of which are imprecise when it comes to update semantics. Several computing trends–knowledge-based expert systems, distributed database management systems, and new applications based on higher order semantic models–point to the need for modeling techniques beyond that which current data models such as the relational and entity-relationship models provide.     

A MPLS/LDP Distributed Architecture for Next Generation Routers

One of the main concerns of network operators is that current routers are not scalable in order to meet future traffic requirements on the core Internet taking into account new applications. The next generation routers with petabit switching capacity are being built to serve higher demands. Their processing capability is enhanced by additional memory and computing resources on control and line cards with a very large number of high speed interfaces. However, the current routing software architecture is not able to fully exploit such an advanced hardware platform. This paper proposes a first distributed software architecture of MPLS/LDP targeting the next generation routers. We investigate the ability of offloading components of the current centralized architecture of MPLS/LDP on to line cards in order to share the load between the control and line cards. This allows the signaling to be achieved entirely at the line card level, hence, improving the robustness, scalability and resiliency of the system. Performance evaluation, considering the CPU utilization and the number of exchanged messages, is also presented.     

分布交互三维视景行为-特征建模方法研究

分布交互三维视景提出了两个新的问题;更有效的建模方法和如何解决视景质量与Ｉｎｔｅｒｎｅｔ传输速度的矛盾？针对以上两个问题,提出了一种更为有效的分布交互三维视景“行为－特征建模”方法及其相应的分布交互三维视景体系结构。     

Cello: A Disk Scheduling Framework for Next Generation Operating Systems*

In this paper, we present the Cello disk scheduling framework for meeting the diverse service requirements of applications. Cello employs a two-level disk scheduling architecture, consisting of a class-independent scheduler and a set of class-specific schedulers. The two levels of the framework allocate disk bandwidth at two time-scales: the class-independent scheduler governs the coarse-grain allocation of bandwidth to application classes, while the class-specific schedulers control the fine-grain interleaving of requests. The two levels of the architecture separate application-independent mechanisms from application-specific scheduling policies, and thereby facilitate the co-existence of multiple class-specific schedulers. We demonstrate that Cello is suitable for next generation operating systems since: (i) it aligns the service provided with the application requirements, (ii) it protects application classes from one another, (iii) it is work-conserving and can adapt to changes in work-load, (iv) it minimizes the seek time and rotational latency overhead incurred during access, and (v) it is computationally efficient.     

分布式状态空间生成的有色petri网模型

该文旨在为分布式的状态空间生成系统设计一个有色petri网模型,并对模型进行性能分析,得出状态空间的分割对分布式系统性能的影响。基于通信时延是系统的性能瓶颈,必须使用与模型结构属性相适应的分割算法,以提高系统的加速比及分布式状态空间生成的性能。     

Knowledge Exchange in Strategic Alliances: Learning in Tension

The proliferation of corporate strategic alliances is explained by the opportunities this provides for the exchange of knowledge and more rapid learning than any other factor. Exploiting complementarities among products and services, strategic alliances enable value creation by capturing the benefits from leveraging knowledge, and discovering complementarities among technologies, and among the activities of the participants. This paper explores the relevance of factors, which may influence the relationship involving the imbalances of internal tensions and alliance instabilities. It is assumed that the objective in a strategic alliance partnership is to maintain the collaborative relationship and to prevent unplanned alliance dissolution. Factors such as availability of resources, bargaining power, alliance type, alliances with specific goals and stages of industry life cycles, and changing market conditions can influence internal tensions and therefore alliance stability. This article argues that alliance partners should balance the conflicting forces to maintain the collaborative knowledge creating and learning relationship.     

构建下一代的智慧企业——企业2.0在开放协作中实现四层面创新

Web2．0为互联网信息的继承、共享和传播建立了新机制。今天,这种机制正在同企业内部原有的架构、流程和业务组件发生深入融合,推动企业信息化步入2．0时代。越来越多的企业正面临发展模式的判断与选择：是积极推进还是审慎观望？出发点的不同将导致结果的差异。IDC在《中国企业2．0创新趋势研究2009 》中分析指出,企业2．0是未来五年中企业发展的必经之路,企业必须全方位地思考其核心机制,才能把握机遇、规避风险。     

WORKSTATION-BASED SOLUTIONS The Next Generation in Computing

Workstations allow organizations to get more mileage out of the installed base of applications and have made communications an everyday event for IS professionals. This column describes the client-server architecture and the capabilities and basic economy of workstation-based business solutions.     

构建下一代的智慧企业——企业2.0在开放协作中实现四层面创新

Web 2.0为互联网信息的继承、共享和传播建立了新机制。今天,这种机制正在同企业内部原有的架构、流程和业务组件发生深入融合,推动企业信息化步入2.0时代。越来越多的企业正面临发展模式的判断与选择:是积极推进还是审慎观望?出发点的不同将导致结果的差异。IDC在《中国企业2.0创新趋势研究2009》中分析指出,企业2.0是未来五年中企业发展的必经之路,企业必须全方位地思考其核心机制,才能把握机遇、规避风险。     

新一代网络QoS研究

随着网络技术和应用的飞速发展,互联网的接入形式以及网络应用日益呈现出复杂、异构和泛在等特点,当前的网络已经暴露出诸多不足,在很多方面无法满足用户对服务质量(QoS)的要求.当前互联网的QoS体系结构及相关技术已经不能适应新一代网络应用的进一步发展.文章着眼于未来互联网的发展方向,从网络QoS体系结构、实时QoS保证、融合QoP的QoS控制以及QoS性能评价理论等几个方面论述新一代网络QoS面临的挑战和解决思路,探讨了新一代网络QoS的发展方向.     

下一代因特网QoS路由机制的研究

目前得到广泛应用的因特网是一种尽力而为服务模式的网络,它不能对网上实时多媒体业务提供服务质量保证,传统的路由选择、流量控制与重传机制具有不可预测的时延特性,对时延敏感的媒体信息传输极为不利。随着多媒体应用领域的拓展和网上通信的日益增多,QoS路由越来越成为目前网络研究的热点。文中针对下一代因特网的综合服务模型与区分服务模型的QoS路由机制做了较详尽的探讨,分析了QoS路由算法的研究现状,并探讨了将来的研究方向。     

下一代网络的一种移动性部署方案

本文分析了下一代网络的应用持点，列出网络现状，提出了在下一代网络上实施移动性的客观条件，及两个实施移动性时要解决的问题．并就相关情况进行了分析，从而形成了在运营商网络上提供移动性的整体网络方案。     

下一代因特网QoS路由机制的研究

目前得到广泛应用的因特网是一种尽力而为服务模式的网络，它不能对网上实时多媒体业务提供服务质量保证，传统的路由选择、流量控制与重传机制具有不可预测的时延特性，对时延敏感的媒体信息传输极为不利。随着多媒体应用领域的拓展和网上通信的日益增多，QoS路由越来越成为目前网络研究的热点。文中针对下一代因特网的综合服务模型与区分服务模型的QoS路由机制做了较详尽的探讨，分析了Q3S路由算法的研究现状，并探讨了将来的研究方向。     

下一代互联网谁主沉浮?

Silverlight在短短半年时间内,快速占据30%的用户终端,与Flash在互联网领域的角逐大幕正式拉开。已经借助搜索与广告业务无敌于天下的Google会有什么样的打算?以多媒体为未来互联网发展方向的下一代互联网,谁才是真正的主角?本期封面报道下一代互联网竞争格局带领我们深入解析各大厂商的产品策略与战略布局。     

下一代通信软件中的特征冲突检测

通信软件在其基本服务基础上进行扩展而得到的附加功能被称为特征,由于特征之间的相互干扰所导致的软件系统的异常行为被称为特征冲突问题.研究了下一代通信软件中由于特征的分布式实现和部署而产生的特征冲突问题.基于通信有限状态机模型,采用系统验证的技术设计了一种分布式特征冲突检测方案;对于生成全局状态自动机所导致的状态爆炸问题,提出了4条消除冗余状态和变迁的优化规则.对所提出的方案及优化策略进行了理论上的证明和实际中的验证,结果均表明,该方案对于通信软件中的特征冲突检测是有效的.     

梭子鱼下一代防火墙Splunk集成

近期梭子鱼网络下一代防火墙（BNG）团队宣布在Splunk市场上为BNG发布了第一代Splunk应用。     

Web技术在下一代网络中的应用研究

下一代网络提供给用户的将是结合了语音／数据的各种Web业务,所以关键问题是如何在下一代网络中灵活地应用Web技术。就VoiceXML,SOAP,UDDI,WSDL,IPDR,CPL技术在NGN业务中的应用进行了研究分析,并提出了一些具有实用价值的应用范例。     

Distributed Knowledge Management in eLearning

With the wide application of Internet in elearning, the requirement of reusable, sharable learning objects and adaptive learning strategies becomes common ground. Traditional methods of Web resources publishing and managing such as free publishing or building application systems for special purposes are not good at fast discovering and aggregating knowledge. This paper discusses Meta-data structure in elearning, which facilitates searching, managing and linking granules of learning contents. Applying Web services and UDDI techniques, a system of knowledge management on Web based on Meta-data is proposed and some questions in application are discussed.