The Application And Research Of Postgraduate Information Management On Temporal Database

The real world is constantly evolving and developing, and the time is the basic element to reflect information of the real world. Everything in the real world has time attributes. For example, the universes, geography, social conditions, a man of study and work experiences, salary and so on are changing over time. With the development of the information technology, the traditional relational database capabilities cannot meet the needs of current information systems on temporal information processing. And the maturity of temporal database theory to address this issue provides a good solution.After 30 years of development, the temporal data processing technology has entered the states of application and development. But due to current technology is not yet fully matured, there has no temporal database management system to implement all the temporal information processing. Hierarchical extends of non-temporal database management system to establish temporal middleware is the best way to achieve TDBMS. At present, the representative middleware TempDB products are the Swiss TimeConsult organization launched in 1998 and the Zhongshan University Collaborative Laboratory developed in 2006. The information of graduate students contains a lot of time-related information, such as admission time to school, the effective time of personal information and scores. Meanwhile, during the graduate, there involve a series of stages such as opening report, intermediate inspection, oral defense and so on. Each stage corresponds a rule which has time attribute. The different stages have different rules, and the same stage also have different rules. The current graduate information management system, using the traditional relational database, is difficult to reflect the temporal state of the data information, and facing great challenges in time processing. The temporal database has unique advantages in time operation and processing. Therefore, the paper presents that using the temporal middleware of TempDB to improve the graduate information management system, and combining relational databases and temporal databases to achieve management of graduate information and rules.Firstly, the paper concluded the temporal database's concepts , basic theory and developing history, and analyzed the temporal query language ATSQL2's characteristics and design ideas, and introduced the most representative temporal data models in the current. Secondly, the paper analyzed hierarchical extends of non-temporal database management system to establish temporal middleware for implementing temporal database, including the temporal middleware's position in the system, the internal processes, the conversion principle and the choice of the underlying database. Thirdly, the paper described the realization of concrete steps by means of the temporal information management middleware in the graduate program, and explored the method by means of the temporal middleware to achieve information management system, and basically implemented temporal database applications. So the paper brings the temporal database application to a wider range of areas. The greatest innovation of the paper is that the temporal database combined with traditional relational database to process data according to the different needs and maximized the effectiveness of their combination.Finally,the comparative experiments demonstrated consistently that combination between TDB and RDB can complement each other's advantages and maximize the effectiveness of information management systems,and point out the deficiencies and the prospect of this paper.