It begins with the theory of intrusion tolerant, discusses a design of the database using the theory and the realizing of ballot in such a system.
从入侵容忍的理论入手，论述了一种入侵容忍的数据库系统的设计方案和在该系统中进行选举的实现过程。
The distributed database system has its own characters and theory, though it was based on the centralized database system.
分布式数据库系统虽然基于集中式数据库系统，但却有一定的特色和理论基础。
Finally, with these theory results, a GIS software develop process is formulated exhausively. This system contains vector drawing sub-system and database sub-system.
最后综合应用前面这些理论结果，详细论述了自主研发的GIS系统，包括矢量绘图系统和数据库系统。
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