SOA应用的技术参考模型研究

阐述了SOA应用的技术参考模型概念和意义、国际上相关领域的研究进展,分析了我国正在编制的《信息技术面向服务的体系结构(SOA)应用的总体技术要求》标准中SOA应用的技术参考模型内容,并对SOA应用的技术参考模型在我国相关行业和领域信息化解决方案中的应用情况进行了介绍.     

EHM业务及其对物联网能力的需求

说明了ITU-T Y.2065 EHM参考模型与ITU-T Y.2060物联网参考模型的区别。参考ITU-T Y.2065分析了EHM业务及其3种子类业务,即EHMH、EHMR和EHMT,并对EHM业务对物联网基础设施的能力需求进行了简要说明。     

WiMAX最新标准研究

分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型、网络控制与管理系统、网络参考模型、通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE802.19g-2007标准进行了研究.最后,对IEEE 802.16k标准的原理和应用进行了详细介绍.     

运维系统工作流引擎的设计与实现

在工作流管理联盟给出的工作流参考模型中,工作流引擎是参考模型的核心,是任务调度器和资源分配器。文中将FSM(有限状态机)的理念应用于引擎,设计了一个工作流引擎,详细描述了工作流参考模型、有限状态机模型、引擎的调度以及3层B/S模式。最后,采用 J2EE 技术对工作流引擎进行了实现,并成功地将工作流引擎在某企业运维系统中加以应用,取得了良好的效果。     

EPON系统测试评估研究

本文首先分析了以太网无源光网络（EPON）系统在有线电视网络中的参考模型,根据该参考模型,研究了有线电视无源光网络测试系统组成及测试评估项目;根据确定的测试项目对国内外多个EPON厂家的设备在实验室环境下进行了系统功能、性能以及多业务承载能力的测试评估;最后对系统测试的结果进行了分析和总结．     

基于RPR的公平参考模型研究与分析

公平性是一个比较模糊的概念,对于网络资源来说,如何分配来说才是公平的,并没有一个比较统一的定义。本文在RPR环网的基础上．研究了环网中的几种带宽分配公平参考模型,并重点讨论了RPR中的RIAS公平参考模型,对其公平性进行了分析与比较,     

WiMAX技术讲座 第4讲 WiMAX网络架构简介

本文分析了WiMAX网络的体系结构,介绍了WiMAX网络的参考模型,最后对WiMAX网络的主要功能进行了描述。     

WiMAX最新标准研究

WiMAX得到了业界的广泛支持,其标准化进程不断推进.本文首先分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型,网络控制与管理系统、网络参考模型,通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE 802.19g-2007标准进行了研究.最后,对IEEE 802.16k标准的原理和应用进行了详细介绍.     

IEEE802．16g：2007和IEEE802．16k：2007标准研究

分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型、网络控制与管理系统、网络参考模型、通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE 802.1 6g:2007标准进行了研究.最后详细介绍了IEEE 802.16k标准的原理和应用.     

基于EPC的制造企业业务流程参考模型验证研究

随着网络信息技术的迅猛发展,企业对业务流程技术的应用趋于广泛,这使得企业对业务流程参考模型的要求逐步提高,验证参考模型结构化的准确性是全面提高业务流程模型质量的核心。本文基于事件驱动链模型,以大型单件小批制造企业物资管理系统业务流程参考模型为研究对象,验证其可行性,并给予优化方案,将实践模型与理论验证方法相结合,得到更具有合理性的参考模型。     

物联网参考模型的分析

研究物联网参考模型是开发和标准化物联网技术的关键而困难的课题,涉及到网络理论和技术中一系列基本概念和方法。通过研究欧盟有关物联网体系结构项目中的相关文稿,探讨了物联网的体系结构参考模型、参考体系结构的概念,分析了欧盟提出的物联网参考模型的建模方法,指出了欧盟物联网参考模型在物理实体、虚拟实体、数字实体和装置等概念方面的合理之处,阐述了物联网交互基本抽象方面的不适合之处,提出了一种改进物联网交互基本抽象的建议。     

基于不同移动模型的移动自组网多播路由协议性能研究

为了研究移动自组网中多播路由协议在不同移动模型下的性能,选取随机路点移动模型、高斯马尔科夫移动模型和参考点组移动模型,将三种移动模型的移动场景加入到NS2中,对基于部分网络编码的实时多播协议PNCRM进行仿真.结果表明,PNCRM协议在随机路点移动模型和高斯马尔科夫移动模型中的数据包投递率明显高于参考点组移动模型,但是参考点组移动模型的总开销和端到端延时是最优的.这样我们就可以根据不同的性能指标要求选择合适的移动模型.     

Sensorless field orientation control of induction machines based ona mutual MRAS scheme

A mutual model reference adaptive system (MRAS) is proposed to implement a position sensorless field-orientation control (FOC) of an induction machine. The reference model and adjustable model used in the mutual MRAS scheme are interchangeable. Therefore, it can be used to identify both rotor speed and the stator resistance of an induction machine. For the rotor speed estimation, one model is used as a reference model and another is the adjustable model. Pure integration and stator leakage inductance are removed from the reference model, resulting in robust performance in low and high speed ranges. For the stator resistance identification, the two models switch their roles. To further improve estimation accuracy of the rotor speed and stator resistance, a simple on-line rotor time constant identification is included. Computer simulations and experimental results are given to show its effectiveness     

Development and Specification of a Reference Model for Agent-Based Systems

Agent-based systems have been the object of intense research over the past decade. While great theoretical progress has been made, the software frameworks for creating agent-based systems offer considerable variability in their capabilities and functionality. This paper introduces a reference model for agent-based systems. The purpose of a reference model is to provide a common conceptual basis for comparing systems and driving the development of software architectures and other standards. The Foundation for Intelligent Physical Agents and other groups have advanced a number of agent standards, yet, to date, no comprehensive reference model has been presented for software systems composed of agents. This paper provides an overview of a reference model for agent-based systems. The agent systems reference model is the result of a multiyear effort studying software systems built with agents and software frameworks for implementing these systems. As part of this study, the team applied software reverse engineering techniques to perform static and dynamic analysis of operational agent-based systems. This analysis enabled identification of key common concepts across over one dozen different agent frameworks. To demonstrate its applicability, the reference model is then used to analyze a number of complete agent-based software systems. It is the belief of the authors that the reference model will be an essential prerequisite for future transition, deployment, and integration of agent-based systems.      

An adjustable model reference adaptive control reconfiguration of self-tuning pole replacement

An adjustable model reference adaptive control strategy is proposed where both the controller and reference model parameters are adapted. Adaptive control laws for this new structure implementing pole cancellation and replacement and avoiding the zero cancellation usually required by model reference adaptive control are developed from self-tuning adaptive algorithm modification.     

Model reference adaptive speed control for induction motor driveusing neural networks

A model reference adaptive speed control scheme using neural networks is presented. The robust observer-based model reference tracking control technique is used to establish the training patterns. Then, the trained neural networks are used as an adaptive speed controller to robustly track a reference model for an induction motor drive     

Auto-tuning of PID controller according to fractional-order reference model approximation for DC rotor control

This paper presents a stochastic, multi-parameters, divergence optimization method for the auto-tuning of proportional–integral–derivative (PID) controllers according to a fractional-order reference model. The study aimed to approximate the step response of the real closed-loop flight control system to the response of a theoretical reference model for a smoother and more precise flight control experience. The proposed heuristic optimization method can auto-tune a PID controller without a precise plant model. This is very advantageous when dealing with model and parameter uncertainties in real control application and practice. Experimental study confirms the reference model driven auto-tuning of the DC rotor prototype.     

OSI参考模型与现场总线通信模型的发展与应用

主要介绍了OSI参考模型与现场总线的基本概念及其发展和在工业中的应用，介绍了几种主要的现场总线通信模型与OSI参考模型之间的相互关系。根据现场总线技术在现实中的应用，指出控制系统的开放互连是发展的必然。