The changeful regulars of hourly water consumption is analyzed,and then the data pattern of hourly water consumption serial is identified by use of autoregression analysis.

In this paper,we make use of trace functions to study compression problems of Data pattern.

Multi-relational data model based on XML;

On the basis of analysis of multidatabase data model principle,this paper discusses queryprocessing problems in MDBS:query decomposition,query transformation and query optimization,and gives a global query decomposition algorithm and a global query optimization approach.

The Purpose and Method of Description Rules for Data Schema in Medical Scientific Data Sharing Network;

The research and development of tele-metering system based on application layer data mode;

And the basic principle is to process the storage by mapping the XML data mode into the database data mode.

To meet the demand of the resource share in geodetic data resource,this paper makes a study on the construction of geodetic data mode,and brings forward a dynamic update method.