完全对称的P2P技术在高校远程教育中的应用研究

为了让P2P技术能够在高校远程教育中等到更好的应用,提出了完全对称结构的P2P体系结构.通过大量的调查研究,分析了传统的主从结构的P2P体系结构存在的问题,包括性能上的瓶颈和管理上的局限性.在此基础上,提出了完全对称结构的P2P体系结构,并设计和构建主从结构的P2P体系结构和完全对称结构的P2P体系结构算法模型.在建立算法模型后,进行了大量的模拟测试.通过效果对比,验证了完全对称的P2P体系结构不仅进一步提高资源搜索效率和数据传输效率,还能大幅度提高整个系统的高可用性,更重要是能让远程教育系统的处理能力进行线性扩展.     

An area/performance trade-off analysis of a GF(2) multiplier architecture for elliptic curve cryptography

A hardware architecture for GF(2^m) multiplication and its evaluation in a hardware architecture for elliptic curve scalar multiplication is presented. The architecture is a parameterizable digit-serial implementation for any field order m. Area/performance trade-off results of the hardware implementation of the multiplier in an FPGA are presented and discussed.     

一类通用的装甲装备自动测试系统体系结构

针对装甲装备种类多样、结构和性能复杂、难以实现通用化自动测试等问题,基于ABBET标准,提出了一类通用的自动测试系统体系结构;分析了该体系的结构特点,介绍了体系构成和主要功能等;之后对相关关键技术,如基于多Agent的测试资源建模、集成故障诊断方法、通用技术状态评价方法等分别进行了介绍;最后介绍了基于该体系的装甲装备某型检测系统,对其硬件结构进行了分析;该体系实现了装甲装备的通用测试,满足了多样化测试需求,已经得到广泛应用,提升了装备测试和保障水平。     

Platform independent overall security architecture in multi-processor system-on-chip integrated circuits for use in mobile phones and handheld devices

A platform independent security architecture for use in Multi-Processor System-on-Chip integrated circuits, primarily oriented for mobile phones and handheld devices, is presented. The suggested architecture provides an enhanced security protection scheme for use in smartphones, PDA’s, as well as other similar systems. Sensitive data storage facilities, cryptographic engines, and physical protection mechanisms such as debug port access control are presented and described in detail. The proposed secure architecture has been incorporated as a part of an application processor which in turn is embedded in a number of smartphone and handheld products. System operation is discussed and hardware realization and experimental results of the proposed architecture are described.     

计算机网络安全体系的一种框架结构及其应用

文章首先给出计算机网络安全体系结构相关概念的定义,然后从安全需求的角度提出了计算机网络安全体系的一种框架结构。通过分析各种安全服务之间的依赖关系,提出一种按照安全服务安全机制的强度对网络安全进行分类和分级的方法;结合 ＩＰＳｅｃ和 ＳＳＬ,分析了 ＴＣＰ／ＩＰ协议体系各层的安全机制,提出了实现安全服务和安全管理的协议层实体模型;最后给出了单元安全技术在安全体系结构中的位置,并论述了该框架结构在实际网络工程安全设计中的应用。     

Supervisory Fault Adaptive Control of a Mobile Robot and Its Application in Sensor-Fault Accommodation

A new architecture for fault adaptive control (FAC) of a mobile robot is presented. This architecture is based on the hybrid supervisory control theory. A systematic design procedure for the major components of this architecture is discussed in the context of sensor-fault accommodation by a mobile robot. The FAC architecture is implemented in a mobile robot for laboratory experimentation. Experimental results are provided to demonstrate the feasibility of the proposed FAC architecture     

An Architecture for Intelligent Interfaces: Outline of an Approach to Supporting Operators of Complex Systems

The conceptual design of a comprehensive support system for operators of complex systems is presented. Key functions within the support system architecture include information management, error monitoring, and adaptive aiding. One of the central knowledge sources underlying this functionality is an operator model that involves a combination of algorithmic and symbolic models for assessing and predicting an operator's activities, awareness, intentions, resources, and performance. Functional block diagrams are presented for the overall architecture as well as the key elements within this architecture. A variety of difficult design issues are discussed, and ongoing efforts aimed at resolving these issues are noted.     

网格化的动态自组织高性能计算机体系结构DSAG

传统的高性能计算机系统面临着变革,特别是体系结构需要创新,应用程序的设计方法与运行模式、可重构计算、网格化技术和光互连技术将深刻影响未来高性能计算机系统体系结构的发展,提出了网格化动态自组织体系结构(DSAG),可以支持体系结构按需定制(architecture on demand)的新模式,并探讨了相应光互连及DSAG操作系统的设计以及DSAG思想在其他层次系统设计中的应用。     

基于Agent的软件体系结构研究

软件体系结构的使用是提高软件质量、减少软件开销和促进软件生产率提高的最有效方法之一,面向Agent技术的提出为复杂分布式问题的求解找到了办法.分析了软件体系结构和软件Agent技术的主要内容,提出基于Agent的软件体系结构,阐明了基于Agent的软件体系结构的总体结构及其在大型软件开发中的应用.     

A Reusable Multi-Agent Architecture for Active Intelligent Websites

In this paper a reusable multi-agent architecture for intelligent Websites is presented and illustrated for an electronic department store. The architecture has been designed and implemented using the compositional design method for multi-agent systems DESIRE. The agents within this architecture are based on a generic information broker agent model. It is shown how the architecture can be exploited to design an intelligent Website for insurance, developed in co-operation with the software company Ordina Utopics and an insurance company.     

CORDIC-Based MMSE-DFE Coefficient Computation

A modular parallel architecture for a MMSE-DFE coefficient computation processor is presented. The architecture is based on QR factorization of a channel-and-noise-dependent data matrix and is implemented using CORDIC processors within a systolic array architecture. Implementation issues including the number of CORDIC stages and the bit precision required in a fixed-point implementation are investigated through computer simulations. The proposed architecture accommodates fractionally spaced DFEs, co-channel interference, and multiple diversity paths.     

Service oriented evolutionary algorithms

This work presents a service oriented architecture for evolutionary algorithms, and an implementation of this architecture using a specific technology (called OSGiLiath). Service oriented architecture is a computational paradigm where users interact using services to increase the integration between systems. The presented abstract architecture is formed by loosely coupled, highly configurable and language-independent services. As an example of an implementation of this architecture, a complete process development using a specific service oriented technology is explained. With this implementation, less effort than classical development in integration, distribution mechanisms and execution time management has been attained. In addition, steps, ideas, advantages and disadvantages, and guidelines to create service oriented evolutionary algorithms are presented. Using existing software, or from scratch, researchers can create services to increase the interoperability in this area.     

一种新的大型通用分布式服务器架构

目前许多大型应用如电子商务系统、电子邮件系统、企业信息系统等都是基于大型分布式服务器系统。给出了一种新的大型分布式服务器系统架构的设计与实现，该分布式服务器体系结构为各种大型应用系统提供了一个统一的服务器架构和开发模型。它能够高效处理大量并发业务，容易随着系统业务规模扩大而扩展，并且适用于目前所有操作系统和硬件平台。     

Negotiation in multi-agent based dynamic scheduling

This paper addresses a multi-agent architecture for dynamic scheduling. The flexibility of the architecture both from the organizational point of view and from the control one is supported by the negotiation technique. The need for integration, the use of standards and information modelling are emphasized. Combining a distributed architecture with an integration of the scheduling and control functionalities flexibility is increased, especially when disruptions take place. Finally, some conclusions and implementation aspects are presented.     

面向应用型人才培养的网络工程专业课程体系探索与实践

探索面向应用型人才培养的网络工程知识领域与课程体系,对构建该专业教学规范,提高教育质量具有重要的现实意义。本文给出了应用型人才的界定,分析了基于CC2005的网络工程问题空间及其知识取向,探讨了网络工程专业的基本定位和培养目标,确立了网络工程人才的基本能力要求。在研究网络工程专业核心知识体系的基础上,本文还提出了与工程教育认证标准相结合的"32X"网络工程专业课程体系基本框架,并以某地方高校应用型网络工程专业课程体系为案例,探索了其应用人才培养的基本思路和模式。由于教学改革实践效果好,该校网络工程被确立为省级特色专业。     

A modified HME architecture for text-dependent speakeridentification

A modified hierarchical mixtures of experts (HME) architecture is presented for text-dependent speaker identification. A new gating network is introduced to the original HME architecture for the use of instantaneous and transitional spectral information in text-dependent speaker identification. The statistical model underlying the proposed architecture is presented and learning is treated as a maximum likelihood problem; in particular, an expectation-maximization (EM) algorithm is also proposed for adjusting the parameters of the proposed architecture. An evaluation has been carried out using a database of isolated digit utterances by 10 male speakers. Experimental results demonstrate that the proposed architecture outperforms the original HME architecture in text-dependent speaker identification.     

Vorgehensmodelle für die rollenbasierte Autorisierung in heterogenen Systemlandschaften

The authors examine how an authorization architecture can be defined which spans various information systems and organizational units. After introducing authorization and architecture fundamentals, related work on authorization, architecture management and role definition is discussed. In particular regarding procedure models for authorization architecture design, these approaches are not very detailed. Moreover they are neither theoretically well-founded nor transparently derived from current industry practices. Therefore two actual industry practices are presented as case studies. By consolidating these practices with findings from current research, a starting point for an improved procedure model for authorization is proposed.     

一种全方位移动机械手的体系结构设计与分析

首先介绍了我们设计和开发的一种全方位移动机械手系统的硬件体系结构,然后根据硬件平台、应用 环境和任务,设计了全方位移动机械手系统的基于行为的混合式软件体系结构,并通过两个实例进一步分析说明所 设计的体系结构的合理性和可行性,同时指出了下一步研究的方向.􀁱     

一种可变带宽数字下变频器设计与实现

针对数字下变频器资源消耗多、信号处理时间长、运算效率低和难以处理多种带宽信号等问题,在研究数字下变频和多相结构运算特点的基础上,提出一种多相带通滤波结构设计,并利用恒速乘法、乘法器复用和多速率输入输出控制等技术实现了这一结构。软硬件仿真表明:该结构不仅能够实现多种带宽信号的正交数字下变频,而且,具有很高的运算效率和硬件资源利用率、较短的信号处理时间。