A Web Services-Based Collaborative Planning, Forecasting, and Replenishment (CPFR) Framework for Managing Spare Parts of Semiconductor Equipment

In a semiconductor foundry, equipment failure has long been recognized as a major cause of unpredicted breakdown which results in an excessive production loss. Equipment maintenance management is one of the essential tasks in semiconductor manufacturing. Due to the prosperity of Internet and IT, e-diagnostics and e-maintenance through the web have become important applications in the semiconductor industry. Web services (WSs) can assist the data integration in heterogeneous e-manufacturing systems to support faster and remote maintenance functions. In this paper, a WS-based collaborative planning, forecasting and replenishment (CPFR) framework, namely WS-CPFR, is developed to collaboratively manage the logistics activities of spare parts in semiconductor equipment between equipment suppliers and semiconductor factories.      

Device technologies for RF front-end circuits in next-generation wireless communications

Next-generation high data rate wireless communication systems offer completely new ways to access information and services. To provide higher data speed and data bandwidth, RF transceivers in next-generation communications are expected to offer higher RF performance in both transmitting and receiving circuitry to meet quality of service. The semiconductor device technologies chosen will depend greatly on the tradeoffs between manufacturing cost and circuit performance requirements, as well as on variations in system architecture. It is hard to find a single semiconductor device technology that offers a total solution to RF transceiver building blocks in terms of system-on-chip integration. The choices of device technologies for each constituent component are important and complicated issues. We review the general performance requirement of key components for RF transceivers for next-generation wireless communications. State-of-the-art high-speed transistor technologies are presented to assess the capabilities and limitations of each technology in the arena of high data rate wireless communications. The pros and cons of each technology are presented and the feasible semiconductor device technologies for next-generation RF transceivers can be chosen upon the discretion of system integrators.     

A Synchronization Protocol for Temporal Isolation of Software Components in Vehicular Systems

We present a method that allows for integration of individually developed functions of software components into a predictable real-time system. The method has been designed to provide a lightweight mechanism that gives temporal firewalls between functions, preventing unpredictable side effects during function integration. The method maps well to the AUTOSAR (AUTomotive Open System ARchitecture) software component model and can thus be used to facilitate seamless and predictable integration and isolation of AUTOSAR components that have been developed by different manufacturers.      

Specifications for integrated circuits in telecommunications equipment

The demand for reliable semiconductor components in telecommunications systems has stimulated the preparation of two specification schemes, one for bipolar digital integrated circuits of the widely used standard-scale type and the other for MOS custom components representing large-scale integration. While sharing many reliability requirements with other applications, the telecommunications field is distinguished by the need for a long service life, often of several decades. Both schemes accordingly involve accelerated tests, particularly those employing elevated ambient temperatures. Other requirements are also common, as for encapsulation, but the main approaches differ. For bipolar circuits, the traditional component sampling procedure is adopted, details being given of the basis and background of some of the more important clauses. The MOS specification is based on design and process control, of which only the latter is presently developed featuring the use of a specially designed test component. Many years must elapse before the impact of the specifications can be judged objectively, but an encouraging impression has been obtained from early experience of their application.     

基于构件技术的移动SNS服务端架构

移动SNS平台包含了众多的关键技术,为了有效提高平台模块的复用率、系统灵活性,提出了基于构件技术的移动SNS服务端架构,详细分解了服务端架构功能,给出了移动SNS服务端的构件模型,描述了构件间的层次关系,提出了构件粒度模型,最后给出了移动SNS服务端软件架构,为移动SNS系统服务端设计提供了一个可行的方案。     

Building reusable mobile agents for network management

Mobile agents can migrate among nodes to perform a set of management tasks at each of the visited nodes. Existing mobile agent-based network management systems often assume that their mobile agents are designed to work in particular networks to raise the efficiency of agent migration among multiple nodes. Unfortunately, such mobile agents cannot be reused in different networks. This paper proposes a framework where a mobile agent for network management is composed of two kinds of software components, an itinerary part and a behavioral logic part. Both components are implemented as mobile agents. The former is a carrier designed for particular networks, and it can efficiently navigate other mobile agents among nodes in its target network. The latter defines management tasks performed at each node independently of any local network. This framework allows a mobile agent for network management to be reused in various networks without being modified. A prototype implementation of this framework and its application were built on a Java-based mobile agent system.     

Integrated facility layout and material handling system design insemiconductor fabrication facilities

Semiconductor manufacturing is an important component of the U.S. manufacturing industry. Most of today's fabrication facilities and those being designed for the near future use a bay layout configuration and an overhead monorail system for moving material between bays. These material handling systems are usually designed with a spine or perimeter type of configuration. This paper investigates the layout and material handling system design integration problem in semiconductor fabrication facilities and proposes a methodology for solving this integrated design problem. A spacefilling curve approach is used to address the facility layout, while the structure of the spine and perimeter configurations are exploited to create a network flow problem to determine the material handling system design. Computational results are presented and show exceptional promise for this procedure in solving the integrated design problem in a semiconductor manufacturing environment     

High speed integrated electronics for communications systems

The functions necessary in broadband communications systems at speeds above 50 Mb/s are discussed. The types of components and functionality that are needed for access to networks and for the transmission and routing of traffic within networks are identified. Integrated circuit components used for customer-network access, network multiplexing, and switching are reviewed. It is shown that currently available digital VLSI technology is capable of achieving both the speeds and the levels of integration necessary to allow broadband network access even to residential subscribers     

Design and Realization of a Two-Level 64K Byte CCD Memory System for Microcomputer Applications

Charge coupled device (CCD) memory technology offers potential economic advantages over semiconductor random-access memory technology. However, the limitations incurred by the serial nature of CCD's have previously restricted their application to computer mainframe memories. The 64 kbyte CCD memory system described in this paper demonstrates the feasibility of CCD memory technology for moderate size memory systems applicable to microcomputer systems. Design objectives included low cost, adequate performance, reliable operation, small size, and low power consumption as well as simple interfacing to standard microprocessors. A simple two-level organization employing a random access memory (RAM) to buffer the serial CCD memory was used to improve the memory system performance and to simplify the interfacing of microcomputers. It is anticipated that the memory system can be easily modified to use 64 kbit and larger CCD memory devices as these become available. Furthermore, the memory system control logic could be integrated on a single large-scale integration (LSI) chip, thereby facilitating the fabrication of relatively large and economical memory systems with a low component count.     

Coordination mechanisms for multi-agent manufacturing systems:applications to integrated manufacturing scheduling

The advent of information technology (IT) has made today's manufacturing systems increasingly distributed. Typically such a system consists of a complex array of computer-based decision units, controllers and databases. Rather than dealing with each component individually, it is necessary to have a new paradigm for management of manufacturing systems, so that all the components and their operations can be managed in an integrated fashion. The multi-agent framework presented in this paper is such a paradigm for achieving system integration. The authors specifically emphasize the coordination mechanisms needed for ensuring the orderly operations and concerted decision making among the components-i.e., agents-of the manufacturing systems. The application of the framework to a printed circuit board manufacturing system and the performance results are also described     

电子军务系统中T-RBAC访问控制组件的设计与应用

电子军务信息系统虽然运行于相对安全的军队内联网中,但仍面临多种不安全因素。 针对其中破坏认证、破坏访问控制两种主要的威胁,提出结合部队编制、人员职务、角色分 工和业务工作流,以任务为中心进行认证与访问控制,从而保护业务系统操作和数据安全的 思想。利用公开密钥基础设施(PKI)和轻量级目录访问协议(LADP)设施实现了基于数字证书 的统一认证以及任务与角色结合的T-RBAC 访问控制组件。在司政后多种业务系统中的实际应用结果显示,该安全组件能够对用户访问 和操作权限进行严格、规范和灵活地控制,有效保证系统、工作流和数据的安全。     

基于SSH的高校后勤学生服务管理信息平台设计

为了适应高校信息化建设的需要,提高高校后勤服务效率和服务质量,跟踪目前先进的计算机技术,提出了采用SSH整合框架技术和RBAC模型并基于角色的权限管理机制的后勤学生服务管理信息系统解决方案,并将其运用在学校学生服务管理信息平台系统的开发中。基于Struts,Spring和Hibernate整合框架的web应用系统,具有良好的可扩充性和可重用性。     

机载战术数据系统框架设计

通过分析机载战术数据系统的通用要求,设计了战术数据系统框架,包含定时器、消息机制、任务监控、数据记录和通信设备管理,并在VxWorks操作系统下实现了该框架。它适用于多种平台的战术数据系统,可移植到其他操作系统下。     

基于组件技术的网络安全管理架构研究

论文针对网络安全管理技术及组件技术的发展现状,提出了一种可伸缩、可扩展的统一网络安全管理架构。在该架构中,各种需要管理的安全产品都被组件化为具有安全功能的组件,并且这些功能组件是易于安装和卸载的。以防火墙功能组件为例,描述了该架构的工作机制和相关关键技术。     

一种可信网络模型的构建方法

当前孤立、单一和附加的网络安全系统已经不能满足客观需求。在分析已有研究的基础上,提出了通过一种基于集成可信身份识别和访问管理方法的安全可信网络框架。该框架提供了一种灵活建模和描述数字用户身份的机制,支持基于事务的隐私保护和个人数据获取,以及灵活的第三方问责机制与端到端的安全交流,并搭建了基于异构无线网络环境的移动数据服务网络平台,进行效果验证分析,实验结果证明了算法的有效性。     

Information for the warrior

The Air Force has been rapidly implementing new structures to provide lightweight communications systems between a theater of operations and rear bases, within the theater of operations, and to other joint Service components. The author describes the effect that the commercial sector is having on several research and development programs being pursued in support of this mission. The Department of Defence (DoD) must be prepared for conflicts that can occur anywhere in the world. As such, the commercial infrastructure must be considered as one of many building blocks for a global system capable of reaching any theater of interest. Thus, the DoD must not only develop the technologies required to extend command and control (C²) into highly hostile environments, but must integrate these technologies with a commercial infrastructure that was designed to meet civilian market demands. This integration is discussed from three perspectives: the integration of the associated transmission fabric; the integration of military and commercial network management functions; and the seamless access to information across this global environment in a location-transparent manner     

卫星通信网络和短波/超短波通信网络的互连

基于未来战争对于无线通信系统集成化、综合化的要求。通过对卫星网络、短波／超短波网络的深入研究，设计了一个新型的无线通信系统，该系统不但可以同时接入上述3种网络实现不同系统的连接，也可以单独作为某一无线网络而独立应用，对未来的军用无线系统研究有一定的参考价值。     

A management and visualization framework for reconfigurable WDM optical networks

As the phenomenal advance in optical WDM networking technologies continues, optical WDM network equipment has been deployed not only in backbone networks, but also in regional, metropolitan, and access networks. It is widely believed that a major component of the next-generation Internet will be an IP-based optical network employing WDM. WDM wavelength routing and signaling have become an active research field, and dynamic and adaptive wavelength routing and assignment algorithms have been proposed. However, there is less work on reporting network control and management system implementation efforts over testbed WDM networks. This article presents a network management and visualization framework aimed at guiding the development of management applications for reconfigurable WDM optical networks. A layered framework architecture including element and network management and visualization is provided, and an object-based information model representing the WDM network is introduced. Functional components on reconfiguration, software agent, and network visualization services are presented, and important issues related to optical lightpath generation are discussed. A network visualization service also provides WDM control and management APIs to applications and access networks such as an IP network management system. To illustrate the usage of the framework, we share our experience in implementing the MONET network control and management system, and present network visualization views obtained from the MONET WDM network to highlight the framework features.     

基于JSF_Spring_Hibernate架构的研究与应用

通过分析传统的EJB组件为核心的J2EE体系架构的不足为切入点,引入了符合中小型企业级应用的轻量级Web框架的思想。在分析了目前最流行的JSF,Spring和Hibernate几种框架技术基础上,提出了一种以Spring框架为核心,在表示层集成JSF框架、持久层采用Hibernate组件的轻量级Web架构,并重点论述了三者的整合方法。最后结合一个生产经营综合管理系统的部分功能模块介绍了JSH架构的应用。