The distributed data query is the core of the distributed database managing system, but the optimized query algorithm is the key technology in query processing.
分布式数据查询是分布式数据库管理系统的核心，而查询优化算法又是查询处理中的关键技术。
The distributed data processing, the database, the virtual reality, the information processing and the information fusion technologies were expatiated in the key technology part.
对其关键技术，主要研究了分布处理技术、数据库技术、虚拟现实技术、信息处理技术和信息融合技术。
There are also many problems about how to organize distributed data storage and parallel processing whether on technology or on theory to research.
然而，组织数据的方式和并行处理的方法无论在理论上还是在技术上都有许多问题需要研究。
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