基于服务器计算技术及其在ASP平台中的应用*

软件资源共享是“软件变服务”的主要手段,是网络化制造ASP平台的主要支撑技术。基于服务器计算是软件资源共享的基本思路。研究了各类基于服务器计算技术的特点、原理等。对X终端、Windows终端、MetaFrame、GoGlobal、Tarantella和VNC等进行了较深入的探讨。介绍了基于服务器计算技术在网络化制造ASP服务平台中的应用。     

制造企业远程服务的电子商务化实现

多媒体远程服务系统是网络化时代企业取得竞争优势的重要支持技术，文章提出了实现企业远程服务的电子商务化的思想，提出了将制造企业远程服务与电子商务系统融合和把企业底层生产设备嵌入电子商务系统中的解决方案，使远程服务和电子商务系统分别面向企业车间设备层和企业管理层，构成包括车间生产设备层的完整电子商务系统。     

基于Web服务架构的模具网络化制造服务平台体系结构的探讨

本文通过对基于Web服务架构的模具网络化制造服务平台的内涵 ,以及平台的建设目标和功能需求分析的基础上 ,构建了基于Web服务架构的模具网络化制造服务平台。介绍了该系统平台的体系结构 ,并重点对平台中的异地协同设计和制造系统的体系结构、系统功能模块及其实现的方法进行了探讨。     

网络化制造的服务匹配技术研究

结合语义的发现技术,提出了一个网络化制造的服务描述模式,在此描述模式的基础上设计了网络化制造的服务匹配计算模型,介绍了该模型的应用平台,说明了该计算模型的可行性。     

支持网络化制造的制造执行系统的研究

介绍了网络化制造对制造执行系统的需求,介绍了网络化制造环境下制造执行系统的关键技术：分布式数字控制技术、工装标刻及自动识别技术以及基于信息反馈的计划调度等。最后针对网络化制造的特点,对制造执行系统的功能模型、总体体系结构以及软件实现体系展开探讨和研究。     

无线局域网在企业车间的实现

随着无线局域网技术的不断成熟,将之应用于企业车间已经成为重要的研究热点.在介绍无线局域网技术的基础上,分析了企业车间的网络环境要求,提出了在现有的有线局域网的基础上组建无线网络的具体方案,既降低了企业组网成本,又实现了现代企业的网络化制造需求.     

网络化制造平台发展现状与技术趋势分析

网络化制造是在网络经济下发展起来的先进制造模式,得到了广泛的应用,论文对现有网络化制造技术进行了总结,并通过对国内外网络化制造平台的调研得出网络化制造集成平台面向服务的发展趋向,在此基础上提出了一种面向服务的网络制造平台架构。最后,对网络化制造的发展进行了展望。     

网络化制造平台中服务调度机制研究

在分析了实施网络化制造平台必要性的基础之上,介绍了网络化制造平台总体框架,针对网络化制造平台复杂服务集群提出了一种服务调度机制,给出了该服务调度机制的体系结构,并阐述了其中的调度机构的软件设计,同时描述了该服务调度机制的运行过程。     

基于Web Services的PDM系统与DNC系统集成解决方案

为了满足中小企业在网络化制造环境下实现企业间集成的需求,提出了基于WebServices经济的、可扩展的、松散耦合的PDM系统与DNC系统集成解决方案。该方案可为企业上层应用系统与车间底层控制系统的集成提供参考,适用于网络化制造环境下企业内部或企业间的制造信息集成。     

基于网络化制造工艺的设计技术以及在机床装备制造应用

随着我国科技的不断发展,信息技术也得到长足发展,且其发展促进了制造业发展的网络化、数字化、全球化,使得制造企业能充分利用外部先进制造资源,提高企业快速响应制造的能力,促进企业的发展壮大。其中网络化制造强调各企业间、我国社会资源乃至全球范围内的资源共享,企业加以整合利用以此提高制造工艺的设计技术及创新能力。另外,网络化能更好的构建企业间制造资源共享的平台,并将该平台转化成能为企业服务的重要工艺技术设计工具。合理的从网络化平台上获取可用的资源并加以整合利用,提高制造工艺的设计技术并将其合理的利用到机床装备制造中。本文基于国内外网络制造研究成果,结合相关知识浅显谈谈基于网络化制造工艺的设计技术以及在机床装备制造中的应用。     

基于强化学习的智能车间调度策略研究综述

智能制造是我国制造业发展的必然趋势,而智能车间调度是制造业升级和深化“两化融合”的关键技术。主要研究强化学习算法在车间调度问题中的应用,为后续的研究奠定基础。其中车间调度主要包括静态调度和动态调度;强化学习算法主要包括基于值函数和AC（Actor-Critic）网络。首先,从总体上阐述了强化学习方法在作业车间调度和流水车间调度这两大问题上的研究现状;其次,对车间调度问题的数学模型以及强化学习算法中最关键的马尔可夫模型建立规则进行分类讨论;最后,根据研究现状和当前工业数字化转型需求,对智能车间调度技术的未来研究方向进行了展望。     

RFID-enabled automation in support of factory integration

In recognition of the need for more effective and efficient factory system integration solutions, this paper improves the method proposed in our previous work, focusing on new mechanisms to bridge the gap between shop floor automation and factory information systems. As one of the mainstream identification technologies, radio frequency identification (RFID) technology makes possible all products uniquely identifiable across factories. By taking advantage of data capacity stored in an RFID tag, critical manufacturing information on a product can be locally stored with the product. RFID technology provides a means for a product to rapidly retrieve its needed information as it advances through shop floors. A corresponding framework to enable the instant delivery of pertinent data and information on a uniquely identifiable job/product at point-of-need across factories is proposed. A small-scale manufacturing application is presented to show how the proposed approach can be implemented on the shop floor.     

A review of current research in manufacturing shop design integration

The importance of the manufacturing shop design in the successful operation of a production system is well documented and, as a result, significant work has been devoted to this area. Due to the inherent complexity of the global shop design problem, much research has focused on individual sub-problems, including the layout of manufacturing resources, the design of the shop aisle network, and the selection of the material handling equipment, rather than addressing the integrated problem directly. This paper reviews literature contributions to shop design integration, as well as partial integration schemes such as the design for operation and control of material handling systems. Furthermore, it examines the ability of models and solution approaches for individual sub-problems of shop design to support integration schemes.     

Supporting agile supply chains using a service-oriented shop floor

The globalized nature of current business environments led to the emergence of new networked enterprise organizational paradigms (supply chains, extended enterprises, virtual enterprises, collaborative networks, etc.) to meet changing requirements and tackle profitable but volatile opportunities overall agility is required.Eventually the shop floor will have to react and accommodate (re)adjustments in the supply chain making it an important piece in the competitiveness puzzle. So far, the research focus has been in high level aspects of supply chain management and the integration of shop floor activities in the process has been left relatively unattended.However, shop floor data is increasingly required in business tools that support decision making. In this context, failing to support agility at shop floor level can compromise the agility of the supply chain.Recent developments in networked information technologies and embedded devices allow enabling intelligence in shop floor rendering it an active and live entity that further enhances the dynamics of the supply chain.The goal of the present work, supported by an implemented test case in the assembly domain, is to demonstrate how one is able to seamless integrate the shop floor with external tools and achieve a highly reconfigurable environment that adapts to changing production requirements and disturbances using service-oriented technology.     

Construction method of shop-floor digital twin based on MBSE

Digital twin (DT) technology is essential for achieving the fusion of virtual-real cyber-physical systems. Academics and companies have made great strides in the theoretical research and case studies of constructing the shop-floor digital twin (SDT), which is the premise of applying DT technology on the shop floor. A shop floor is a large complex system that involves many elements including people, machines, materials, methods, and the environment and processes, such as the technical flow, business process, logistics, and control flow. However, most of the developed cases lack a hierarchical, structured and modularized implementation framework for the development of an SDT system, which leads to problems such as a low reuse rate of the system blocks, lack of scalability, and high upgrade and maintenance costs. In response to these issues, we propose a construction method of the DT for the shop floor based on model-based systems engineering from the perspective of the system. In this method, a comprehensive DT model for the shop floor is gradually constructed by using system modeling language, the modeling method “MagicGrid,” and the “V model” of systems engineering. The model includes four dimensions of the shop-floor requirements, structure, behavior, and parameters, as well as three stages (the problem domain, solution domain, and implementation domain), and connects nine steps of the “V model,” including the system requirements, system architecture, subsystem implementation, subsystem integration, and system verification. Then, based on an example of a real NC machining shop floor, subsystems including a visualization system, synchronization system, and simulation system, are discussed. Finally, the functions of the integrated systems are verified based on the requirements, including the real-time synchronization of “man, machine, material, and method” and the transient simulation in real time. The numerical indicators of the integrated system are verified, including the model completeness and synchronization timeliness.     

AJAX技术与J2EE集成的研究与应用

使用AJAX(Asynchronous JavaScript and XML)技术结合J2EE应用能实现一种全新的动态Web应用,这种应用方式无论从外观还是操作都很类似传统的桌面应用程序,却不再依赖插件和浏览器的某些特定功能。分析了AJAX的概念、特点及关键技术后,简述AJAX技术能与J2EE集成的原理,最后介绍运用DWR(Direct Web Remoting)框架实现的在线商店产品数据查询模块。     

基于J2EE的格子铺管理平台设计与实现

分析了格子铺基础管理的不足;基于J2EE核心技术,以MVC框架为技术支持,运用JFreeChart、JSON等技术,构建和开发了高效、便捷的格子铺管理平台。     

Shop floor control in computer-integrated manufacturing for large-scale integrated wafer fabrication systems

Manufacturing technology in the field of Large-Scale-Integrated (LSI) circuit production has overcome the problems of enlarged wafer size and increasing level of integration. The market environment of the LSI industry has become more demanding with increased requirements, delivery time and stiffer cost competition. A Computer-Integrated Manufacturing System (CIMS) well-adapted to the unique characteristics of LSI production system is thus urgently needed.

This paper describes the development of CIMS in LSI production systems, and presents the example of a DTS (Diffusion Total System), constructed in a real LSI wafer fabrication factory. Features of DTS are (a) on-line real-time manufacturing data acquisition and monitoring through a production information network, (b) automatic control of process equipment, (c) shop floor control for computer aided decision support at the shop floor level, and (d) data analysis and reporting derived from a large amount of accumulated data. This paper deals with shop floor control, and in particular with a priority control system unique to the LSI wafer fabrication line.     

Applications of agent-based systems in intelligent manufacturing: An updated review

Agent technology has been recognized as a promising paradigm for next generation manufacturing systems. Researchers have attempted to apply agent technology to manufacturing enterprise integration, enterprise collaboration (including supply chain management and virtual enterprises), manufacturing process planning and scheduling, shop floor control, and to holonic manufacturing as an implementation methodology. This paper provides an update review on the recent achievements in these areas, and discusses some key issues in implementing agent-based manufacturing systems such as agent encapsulation, agent organization, agent coordination and negotiation, system dynamics, learning, optimization, security and privacy, tools and standards.     

异构环境下车间层信息集成的分析与研究

目前在CIMS技术领域TCP/IP协议有向各层渗透 的趋势,同时现场总线国际标准的纷争尚未定论．这一切都有力地冲击着CIMS企业,特别是 车间层信息集成的传统观念．本文分析和研究了近年来企业网络技术的发展,并根据国情提 出了异构环境下车间层信息集成的方案．