摘要
时态信息表示和查询是时态数据库的研究重点,但现有的时态数据库模型在处理不确定时态信息方面仍存在较大困难。而现实生活中很多时态信息都是不确定的,故提出了一种不确定时态信息的表示方法,并扩展时态运算使其支持不确定时态信息的处理和查询,从而扩展了时态数据库的适用范围。
Temporal information representation and query are the main research topics in temporal database. It still remains difficulties in handing uncertain temporal information in temporal database while in real life many events happen with uncertain temporal information. A new model for representing uncertain temporal information is proposed and the extensions of various temporal operations are also presented in this paper. The model and the extensions enrich the flexibility of temporal database.
出处
《计算机科学》
CSCD
北大核心
2005年第8期161-163,共3页
Computer Science
基金
广东省科技攻关项目(A10202001)
广州市科技攻关项目(2004Z2-D0091)
