分布式系统

It had developed an antetype system about vary data flow for sugarvest harvester products.which was based on CORBA and Java,(5) It had realized the integration between integration platform and intelligent design system.

4基于COR日A/Java技术构架的分布式异构数据库企业信息集成平台，透明地实现分布式、异构系统及数据库的访问，可以很好地解决数据地域分散，应用环境异构的问题。并开发出甘蔗收割机械产品异构数据源的原型系统。(5)编程实现与甘蔗收割机械智能专家系统进行双向信息交流和共。

The unified object model builds a bridge for high efficient data exchange between HLA-based simulation platform and parallel rendering platform,reducing the development workload of integration between them,and supporting the real-time rendering of massive complex scene and large quantity of simulation entity object to help to enhance the timeliness of scene simulation.

随着社会需求的不断发展，在军事作战、娱乐游戏等领域的应用需要大规模分布式仿真系统的支持，这些系统一般涉及到大规模复杂场景和大量仿真实体，对分布式交互仿真系统的对象管理能力和绘制能力提出了较高的要求。

The development trend of aeroengine control system is distributed control system,and communication based on data bus is the key technology of DCS.

航空发动机控制系统发展趋势是分布式控制系统，基于数据总线的通信技术是分布式控制系统的关键。

It carrys out incompact coupling of distributed plotting system, declined the data discharge in the system effectively.

针对分布式标图系统的面临的主要问题，提出运用发布／订阅和消息中间件的技术，实现分布式标图系统的松散耦合，有效地降低了系统中的数据流量。

Mainstream distributed application systems are middleware based systems presently, but common middleware lack of real-time capacity.Real-time middleware offers a common soft bus framework eliminated distributed real-time systems unhandy architecture.

实时中间件提供了真正的通用软件总线结构，它可以去掉当前分布式实时系统的不灵活结构，因此中间件与实时系统的结合自然成了今后分布式实时系统的一个重要发展方向。

A case ofapplication of CAN bus on the distributed automatic system ofsubstation is illustrated.To meet the need ofautomatic controlsystem ofsubstation,a network is necessity because ofthe distributed control units ofthe substation.To shortenthe developed period of the system,an interface bridge between the RS232 and CAN bus is made.The result oftest run shows thatthe requirements ofsystem can be satisfied by the project.

摘 要：对一个把CAN总线应用到分布式变电所自动化系统的例子进行了分析，对于分布式变电所自动化系统来说，通信网络的效率、安全性和实时性具有重要意义，在实际工作中，通过在现行测量、控制和保护单元外增加一个RS232和CAN总线之间的转换器，构成变电所自动化系统的现场总线网络，试运行情况表明：该方案完全能满足系统的要求。

In the second part , it specificatively introduces the research and development of Distributed Virtual Reality,the principle, the components, the model and the typical software environment of DVR system,then we can put up a platform of DVR system.

第二部分讨论了分布式虚拟环境的系统组成，包括分布式虚拟环境的系统结构、环境模型，同时介绍了几个典型开发系统。

The distributed management information system are charactered for crossing organizations,platforms and districts,and it's running environment owns variety and complexity,which add to the difficulties to guarantee that the system can run safely.

1引言分布式管理信息系统通常由一个中心系统和数个分布于不同运行环境中的子系统构成。中心系统是分布式信息管理系统的核心，负责数据的汇总、处理、报表和分发。

The system discussed before is analysed and modeled by means of using Unified Modeling Language. On the basis, the distributed Web Service frame of the system and distributed database structure is studied in detail. Meanwhile, the function of system, such as user management and human basic information management and so on, is implemented in detail.

在运用统一建模语言对系统进行分析和建模的基础上，对系统的分布式Web Service架构和分布式数据库结构作了详细研究和设计，并具体实现了用户管理和基本信息管理等系统功能。

A data sharing and cooperative access control policy model aiming at the weakness of collaboration and self-security in DIDS(Distributed Intrusion Detection System) is presented.

针对分布式入侵检测系统(DIDS：Distributed Intrusion Detection System)面临的协作和自身安全问题，提出了一个分布式入侵检测系统和多组件入侵检测系统间的数据共享策略和合作访问控制策略模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。