Establishment of the dynamic database system of the apparatus and its application building of the winter wheat;

Study and application of dynamic database model;

The Development of Network Dynamic Database for Automobile Seat Materials

The consturctive form of fact base, rules and dynamic data base of experrt system arerecommended in the paper.

This paper introduces the background of studying on the underground pipeline information system, designs a model of dynamic meta database for underground pipelines, discusses on some technological problems such as the meta data memory, meta data management, meta data copy, and meta data retrieval,etc.