TXP分散控制系统在660MW发电机组中的应用

根据TXP分散控制系统在邯峰电厂 6 6 0MW发电机组上实际应用 ,介绍了TXP分散控制系统的系统配置和实现功能 ,其中重点介绍了OM 6 5 0过程控制和管理系统的构成、功能、组态的内容、组态途径、过程监视画面、报表和性能计算 ;详细介绍了自动系统AS6 2 0的控制范围及其功能 ,如 :DAS、SCS、CCS、FSSS、DEH、MEH、BPS。同时 ,结合本人在邯峰电厂调试中发现的问题 ,给出了相应问题的处理方法     

分布多媒体系统的多媒体动态同步模型

在分布多媒体系统中，多媒体具有动态同步特性，同时关键媒体的同步要求在应用中享有优先权．现有的多媒体同步模型无法满足这些要求，现提出一个新的基于时间Ｐｅｔｒｉ网的多媒体动态同步模型——ＤＳＰＮ模型．它不仅能使分布多媒体系统依据实际运行状况和新提出的同步类型，以更准确、高效的方式来保持多媒体同步，而且允许用户对多媒体表现过程进行交互操作．     

分布式实时系统的高可靠性研究与实现

将实时特性引入分布式系统将会给系统可靠性与分析带来许多新的变化。     

基于Haar函数的分布参数系统辨识

借助于正交函数序列对分布参数系统进行辨识，是一种妊之有效的辨识方法。     

Distributed Multi-Level Recovery in Main-Memory Databases

In this paper we present recovery techniques for distributed main-memory databases, specifically for client-server and shared-disk architectures. We present a recovery scheme for client-server architectures which is based on shipping log records to the server, and two recovery schemes for shared-disk architectures—one based on page shipping, and the other based on broadcasting of the log of updates. The schemes offer different tradeoffs, based on factors such as update rates.Our techniques are extensions to a distributed-memory setting of a centralized recovery scheme for main-memory databases, which has been implemented in the Dalì main-memory database system. Our centralized as well as distributed-memory recovery schemes have several attractive features—they support an explicit multi-level recovery abstraction for high concurrency, reduce disk I/O by writing only redo log records to disk during normal processing, and use per-transaction redo and undo logs to reduce contention on the system log. Further, the techniques use a fuzzy checkpointing scheme that writes only dirty pages to disk, yet minimally interferes with normal processing—all but one of our recovery schemes do not require updaters to even acquire a latch before updating a page. Our log shipping/broadcasting schemes also support concurrent updates to the same page at different sites.     

基于假设的分布式协作求解

本文提出在大型互联网络上实现协作求解的一种方法．基于假设的协作求解模型ACPS（assumption－basedcooperativeproblemsolving）能够实现不确定环境下多主体间的连续协作求解．本文介绍了ACPS模型的基本思想，并以军事态势估计问题为背景简要说明了该模型在分布式协作信息处理系统DESW中的实现．     

分布式工程DBMS的扩展客户机／服务器体系结构

客户机／服务器体系结构是构造数据库系统的一种新技术。文中在对标准客户机／服务器体系结构的特点以及存在的问题进行分析的基础上，针对ＣＡＤ／ＣＡＭ等工程应用独立设计、分工、分工合作、长事务处理的特点，提出了一种扩展客户机／服务器体系结构。并介绍了自行研制的一个基于扩展客户机／服务器体系结构的分布式工程数据库管理系统ｄＥＤＢＳＭ，及其若干关键实现方法。     

基于客户/服务器结构的分布式问题求解系统

基于客户／服务器结构的分布式问题求解系统鲁东明何志均（浙江大学人工智能研究所杭州３１００２７）关键词智能问题求解，分布式系统，客户服务器模型，集成化知识推理．１）国家自然科学基金资助项目．收稿日期１９９４－０７－２２１引言客户／服务器技术使问题求解的...     

人工神经网络的并行分布处理

神经元的映射分配是人工神经网络虚拟实现中的重要研究课题。本文系统地分析了人工神经网络的重要性质－并行分布处理，并对映射分配问题中的两个关键性概念－负载均衡和通信开销进行了深入讨论。以此为基础，提出了一系列映射算法，并对算法性能进行了分析。其中，吸收算法最大程度地开发了人工神经网络固有的并行性，是一个实时的算法。     

Building Large,Complex, Distributed Safety-Critical Operating Systems

Safety-critical systems typically operate in unpredictable environments. Requirements for safety and reliability are in conflict with those for real-time responsiveness. Due to unpredictable environmental needs there is no static trade-off between measures to accommodate the conflicting objectives. Instead every feature or operating system service has to be adaptive. Finally, for any design problem, there cannot be any closed-form (formal) approach taking care at the same time of (external) time constraints or deadlines, and synchronization requirements in distributed design. The reason is that these two aspects are causally independent. - In this situation we worked out a heuristic experimental, performance-driven and performance-based methodology that allows in an educated way to start with a coarse system model, with accurate logical expectations regarding its behavior. Through experiments these expectations are validated. If they are found to successfully stand the tests extended expectations and model features are generated for refining the previous design as well as its performance criteria. The refinement is done in such a way that the previous experimental configurations are extreme model cases or data profiles which both logically and experimentally are to reproduce the behavior of the previous modeling step. Thus the novel performance aspects or tendencies could then unambiguously be attributed to the influences of the refined model features. We termed this methodology Incremental Experimentation. As a general methodology it relies on a principle of comparative performance studies rather than on realistic data for narrow application ranges. The paper describes how we applied a 5-step design and refinement procedure for developing, analyzing, and evaluating our distributed operating system MELODY that exhibits novel services for supporting real-time and safety-critical applications in unpredictable environments. Experimental set-ups and theme-related findings are discussed in particular.