Thus respond to the age - request , modern logistics should be combined with the technique of network , information and computer etc . in this paper , the developing tendency of the logistics is systemic analyzed ; cscw and technique of distributed database is general described ; besides , combined with topic , bring the approach to the problem in database design 所以应时代的要求，现代物流需要和网络、信息、计算机等技术的结合。本文系统的分析了物流业的发展和趋势；对cscw和分布式数据库技术都作了较为全面的论述；此外，结合课题，还对分布式数据库设计过程中所遇到的问题，提出了解决方法。
For the process of simulation , the databases are supposed to be provided with two sides : real - time access for the distributed memory data and intelligence simulation technology . because each site in this simulation database emulates the different position and function structure character , and comes down to multi - platform , multi - type data , the great amount of system parameters , models , model structure parameters and rules in simulation must be managed by distributed database for administration , rapid information query and dynamic storage modification 由于该仿真系统的每一个仿真节点分别模拟了分布在不同位置、不同功能结构特征的仿真对象，而且，涉及到多平台、不同形式和种类的数据，因此仿真过程中大量的系统参数、模型、模型结构参数和规则，都必须使用分布式数据库技术来管理、进行高速的数据检索和动态存储修改，来支持仿真环境的动态维护与仿真环境之间的相互作用。
The study of distributed involves the study of distributed processing technology , net work technology and database study , which must be related to solution on some real existent problems . this paper mainly resolves distributed proplem of distributd pdm system , explores a set of schemes of feasible dirtributed database system , and solve problem of production data management in enterprise . main contents as follow : 1 . studying duplicating proplem of distributed database sintem , and giving a general model 分布式数据库系统的研究涉及分布式处理技术、网络技术和数据库技术的研究，而这些研究必须贯穿在对一些现实问题的解决之中。本文将通过对分布式数据库技术、分布式处理技术、网络技术深入研究的基础上，重点解决分布式pdm系统的集成问题，进而探索出一套切实可行的分布式数据库系统的的解决方案，解决现实企业中面临的产品数据管理问题。主要研究内容有： 1
The paper testified the application of the distributed database technology in the management information system by designing a system for a medical corporation as practical example in detail witch includes require analysis , devising function , designing distributed database , safety insurance and applying system 本文以某药业公司的营销管理平台为例，通过系统的需求分析、功能设计、分布式数据库设计、安全性保证和系统实施等五个方面详细验证了分布式数据库技术在企业管理信息系统中的应用。
Some topics of this publication are : data integration methods ; data mining ; data models and database design ; distributed database techniques and interoperability ; domain ontologies and concept - based search ; information systems and security ; data warehousing , olap , and knowledge discovery ; information systems , mobile computing , and agents ; integrated information systems ; intelligent information agents ; knowledge representation and knowledge engineering ; knowledge management ; linguistic components of information systems ; logic and databases ; and metamodels and model driven architecture 有些题目本刊物是：数据集成方法;数据挖掘;数据模型和数据库设计;分布式数据库技术和互操作;域本体与概念型搜索;信息系统和安全;数据仓库，联机分析，知识发现;信息系统电脑，移动设备和代理商;综合信息系统;智能信息经纪人;知识表示和知识工程;知识管理;语言成分的信息系统;逻辑和数据库;与元和模型驱动架构。
Consequently , realize the uniform searching between distributed heterogeneous databases . this paper makes a brief introduction about digital library technology , distributed database technology and middleware , etc . moreover , proposes the four layers model based on corba middleware and the actual solution built with visibroker . and makes a detail analysis and realization to three key part in scheme , those are idl mapping 、 server object at server end and the procedure of calling services at client end 本文简要介绍了数字图书馆技术、分布式数据库技术以及中间件技术，并提出了基于corba中间件的四层解决模型以及利用visibroker搭建的实际解决方案，对解决方案中的三大部分- - idl映射、服务器端服务对象和客户端调用服务过程作了详细的分析与实现。
Distributed database technology is the integration of database technology and computer network technology . apart from the characteristics of centralized database such as data logical independence and physical independence , it has its own unique characteristics such as distributed independence of data . it has to consider not only the self - government of local places , but also the logical integrity of the whole database 分布式数据库技术是数据库技术和计算机网络技术的结合，它除了具有集中式数据库所具有的特点外，还具有它自己独有的特点：它不但要考虑局部场地的自治，而且要解决全局数据库的逻辑整体性；它除了具有集中式数据库所具有的数据逻辑独立性和物理独立性，还具有数据的分布独立性。
Firstly , this paper contrapose the disfigurements which exist in the internal gis software , the trend and technology of gis in the era of internet was discussed . secondly , using distributed computing technology to solve the problem of speed , making use of distributed database technology to settle the data distribution and share problem and utilizing distributed object technology to solve the problem of integrating the subsystems . finally , according to analysis for actual problem i have met in my developing process , this paper put forward a blue print which is very available to webgis based on distributed environment 本文首先针对目前国内gis软件的缺陷，对互联网时代地理信息系统的发展趋势和技术进行了探讨；然后提出利用分布式计算技术解决速度问题，利用分布式数据库技术解决数据分布和数据共享问题以及利用分布式对象技术克服各子系统集成问题的思路，探讨了在上述技术的基础上开发动态更新的webgis ；最后通过对实际应用中所遇到问题的分析，提出了切实可行的基于分布式环境的webgis解决方案。
