分布计算技术

由于社会需要的牵引和使能技术的推动，分布计算模式正在深刻地影响着现代信息社会的形成和发展。本文从总体上讨论分布计算技术，试图说明分布计算环境的概念、分布计算技术的发展现状和趋势，以及发展分布计算应用面临的挑战。     

分布对象技术综述

分布对象技术是解决当前分布异构计算的主要方法，本文详细介绍分布对象技术产生的背景，分布对象模型和组件概念、模型，同时介绍了几种主要的分布对象标准及其实现情况。     

基于CORBA的WebGIS系统研究及开发

近年来，随着分布对象技术和网络技术的不断发展，分布对象WebGIS已逐渐成为WebGIS开发的一个热点。在众多的分布对象技术中，CORBA以其优良的特性，在构建异构环境下的WebGIS中显示出明显优势。本论述了使用分布对象技术构建WebGIS的必要性，并通过分析各分布对象技术的优劣，提出了基于CORBA技术的WebGIS系统。最后。结合该系统着重剖析了基于CORBA规范的分布对象WebGIS的运行框架、系统优势和开发手段。     

Java RMI在分布计算中的应用

随着网络技术、面向对象技术的成熟,分布计算已成为软件设计的主流技术.Java RMI是Java实现网络分布计算应用模型的解决方案之一.本文简单介绍RMI的编程方法,讨论了利用RMI进行分布计算的步骤,通过实例说明访问Oracle数据库的分布计算实现过程.     

国防科技大学计算机学院工学博士学位论文摘要

<正> 本文的主要工作围绕高效、灵活的分布对象计算环境技术的研究展开,包括:(1)基于分布对象计算提出了分布对象层次抽象模型,定义了分布对象的抽象层次。综合Agent技术与分布对象计算深入研究了分布对象计算环境的总体框架。基于AOP技术的构件技术,通过层次抽象模型细化总体框架,提出了一种开放实现的层次式分布对象计算环境框     

JavaRMI在分布计算中的应用

随着网络技术、面向对象技术的成熟,分布计算已成为软件设计的主流技术。JavaRMI是Java实现网络分布计算应用模型的解决方案之一。本文简单介绍RMI的编程方法,讨论了利用RMI进行分布计算的步骤,通过实例说明访问Oracle数据库的分布计算实现过程。     

基于分布对象的高性能计算技术的探讨

近几年来,分布对象技术引起了一些从事高性能计算技术研究者的注意,他们试图利用分布对象技术的封装。易于扩展和复用的特性,构造易用的、可复用的高性能计算系统。分布对象结构可分为构件框架层、分布结构层和进程通信层。针对这三个层次,将基于分布对象的高性能计算研究分为三类并分别进行了综述和分析。最后简单介绍所实现的一个分布对象的高性能计算框架ＨＰＣＡ。     

基于分布对象的离散事件仿真系统

分布对象技术将面向对象的概念揉合到分布计算中,使得基于对象的软件成员在分布异构环境中可重用、可移植和可互操作。文章把分布对象技术用于离散事件系统仿真中,通过对离散事件系统中分布对象的标识,分布对象间同步机制的讨论,提出了基于分布对象离散事件仿真系统的结构,定义了分布仿真对象的接口。     

2012年全国开放式分布与并行计算学术年会征文通知

全国开放式分布与并行计算学术年会(DPCS)旨在为开放式分布与并行计算技术、开放系统技术、开放式网络技术与应用、开放系统的安全技术和服务质量保障技术及其相关领域的研究者、开发者和用户提供一个学术交流和科学研究成果展示的平台。2012年全国开放式分布与并行计算学术年会(DPCS2012)将于2012年9月26日至28日在浙江省宁波市召开。会议由中国计算机学会开放系统专业委员会主办、宁波大     

CCM:下一代分布式应用的最佳模型

一、CCM概述CORBA分布计算技术是OMG组织在众多开放系统平台厂商提交的分布对象互操作内容的基础上,制定的公共对象请求代理体系规范。CORBA分布计算技术是由绝大多数分布计算平台厂商所支持和遵循的系统规范技术,具有模型完整、先进,独立于系统平台和开发语言,被支持程度广泛的特点,已逐渐成为分布计算技术的标准。COBRA标准主要分为三个层次:对象请求代理、公共对象服务和公共设施。最底层是对象请求代理ORB,规定了分布对象的定义(接口)和语言映射,实现对象间的通信和互操作,是分布对象系统中的“软总线”;在ORB之上定义了很多…     

Holon技术在敏捷制造系统中的应用研究

面对日益多样化的客户需求和市场能够快速响应的生产状况，制造业领域的生产模式也朝着客户化、敏捷化、柔性化的方向发展，敏捷制造模式有望成为21世纪的发展趋势。讨论了将全能体Holon作为实施敏捷制造的现实技术问题，分析比较了目前国内外在此领域的研究现状。通过简单归纳Holon的定义，并对Holon的内部逻辑结构加以分析说明。提出了基于Holon的面向订单生产敏捷制造企业参考模型。     

A conceptual framework for agent-based agile manufacturing cells

Abstract. Agile manufacturing techniques are perceived as the manufacturing systems of the future. Agile manufacturing cells are dynamic and reconfigurable and the modelling of the manufacturing cells and its interaction mechanism is critical to its successful use. This paper deals with the architecture and cooperation mechanism of web‐based agile manufacturing cells. Based on an analysis of structure and organization requirements of agile manufacturing cells and a comparison of three basic architectures of manufacturing systems, the quasi‐heterarchical architecture is used for the agile manufacturing cell. Functional layers are defined in this architecture to make the cell's control system reconfigurable and reusable. Agent technology is adopted for implementation of each layer's functions to establish an agent‐based model of agile manufacturing cells. Four types of agents including cooperation agent, job management agent, resource broker agent, and resource control agent are defined, and their functions discussed. Finally, a real time interaction mechanism of the agents is presented by considering the activities during the agents’ cooperation in an agile manufacturing cell.     

基于敏捷制造模式的数字化生产车间的研究

着眼于敏捷制造的特点,分析了敏捷型数字化生产车间的内涵及特点。在此基础之上讨论了敏捷型生产的体系结构和运行逻辑,并更深入地阐述了敏捷型数字化生产车间的信息通讯以及与之相对应的制造资源业务管理流程。     

Hybrid lean–agile manufacturing system technical facet,in automotive sector

In the automotive sector, planners have a difficult balancing act. They benefit from commonality of vehicle parts, yet they must meet more niche demands. The challenge is to strike a balance between these extremes in a cost-effective way without compromising quality. Lean strategies could increase competitiveness and profitability by reducing manufacturing costs. Concurrently, agile strategies could enable enterprises to cope with fluctuations. A hybrid lean–agile approach can be an optimal strategic blend for a manufacturing enterprise to meet this challenge. Flexible focused factory, globalized fractal E-manufacturing, innovative value chain strategies, and designing dynamic manufacturing strategies are the four technical pillars of the proposed hybrid lean–agile manufacturing system technical facet. The study shows that hybridizing the lean and agile systems together is technically valid and can be implemented in an industrial setting. It shows how strategically a hybrid lean–agile system can be implemented. It also shows that about one third of the variation in successfully dealing with the sources of competitive advantage in automotive industry can be explained by adopting the technical facet of the hybrid lean–agile manufacturing system.     

敏捷模式下质量信息代理的在线组织方法研究

敏捷制造中需要先进的处理质量信息的工作方法,该文研究了一种质量信息代理的在线组织方法,借助于动态连接和可视化技术,将有限的软硬件资源组织成不同的结构,以满足敏捷企业的变化性和快速响应性。     

敏捷制造框架体系结构研究

文中以系统方法论的观点探讨了敏捷制造模式的描述框架建立问题,从中阐述敏捷制造的哲理、概念特征、功能特征及与重构工程和并行工程等相关学科的联系,并给出敏捷化工程实施的总体思路。所提出的框架原理具有一定的工程实践意义。     

Design of Scheduling Decision Mechanism for Agile Manufacturing System

Design of scheduling decision mechanism is a key issue of scheduling decision method and strategy for agile manufacturing system. Effective scheduling decision mechanism helps to improve the operational agility of manufacturing system. Several scheduling decision mechanisms are discussed, including scheduling forecasting mechanism, cooperation mechanism and cell scheduling mechanism. Also soft decision mechanism is put forward as a promising prospect for agile manufacturing system, and some key techniques in soft decision mechanism are introduced.     

基于多智能agent的敏捷供应链

论述了敏捷供应链概念和特点,指出敏捷供应链是以动态联盟为基础的敏捷制造的关键技术之一。敏捷供应链作为一个典型的分布式系统,该文采用多智能agent系统建立敏捷供应链系统的框架,并对通用智能agent的结构、功能以及智能agent之间协作与通讯进行了研究。     

A TCPN based approach to model the coordination in virtual manufacturing organizations☆

The recent developments of communication technologies and network computing have enabled the occurrence of the advanced manufacturing strategy—agile manufacturing. The essence of the agile manufacturing strategy is to form a virtual manufacturing organization (VMO), which integrates the core competencies of member enterprises in order to respond to the global market and increasing customer requirements rapidly. In a VMO, the manufacturing processes are distributed. So modeling and coordination of these processes are very complex. In this paper, we present a Petri Net based approach to model these distributed manufacturing processes and interaction relations among them. A workflow based manufacturing process execution environment is also established to support the implementation of the distributed manufacturing processes.     

Agility and production flow layouts: An analytical decision analysis

The term ‘agile manufacturing’ has referred to operational aspects of a manufacturing company concerning their ability to produce customized products at mass production prices and with short lead times. A core issue faced within agile manufacturing is the need for appropriate and supporting production and operations systems. Many design dimensions of agility and agile manufacturing exist. To help attain this goal for integrating the many design dimensions, operations infrastructure and capacity must be carefully planned to manage production flow, and thus production layout planning takes on an increasingly important role. Given the importance of these dimensions in response to agility, this paper seeks to make a contribution by providing insights into a decision aid for evaluating production flow layouts that support and enhance the agile manufacture of products. Layout design has a significant impact on the performance of a manufacturing or service industry system and has been an active research area for many decades. Strategic evaluation of production layouts requires consideration of both qualitative and quantitative factors (managerial, organizational, and technical). This paper makes use of the Analytical Network Process (ANP) which captures interdependencies among different criteria, sub-criteria and dimensions, an evident characteristic of production flow layouts in complex agile manufacturing environments. An application case study exemplifying the practical usefulness of this type of model describes how management, after implementation of the model, made a mid-course correction related to the production layout initially selected.