单元和双元事件上的时间算子研究[EB/OL]
北京：中国科技论文在线
这些算子可以完善得描述事件相对和绝对时间属性
） Abstract： Advanced applications of sensors, network traffic, and financial markets have produced massive, continuous, and time-ordered data streams, calling for event detection techniques
Beyond the widely adopted sequence operator in current data stream management systems, as well as inspired by the great work developed in temporal logic and active database fields, this paper presents a rich set of temporal operators on events, with an emphasis on the temporal properties and relative temporal relationships of events
We outline three temporal operators on unary events (Within and Last), together with four ones on binary events (Concur; Sequence (as a comma behind), and Overlap)
These operators are rich enough to describe temporalproperties and relative temporal relationships of events
Keywords： Computer Software;event;stream;temporal operator 下载PDF阅读器 PDF全文下载： 初稿 （ 154 ） 作者简介： Wanghao,(1980-),male,Ph
D candidate,context aware database 通信联系人： 【收录情况】 中国科技论文在线： 王昊
这些算子侧重于描述时间属性和事件间的相对关系
2、 清华大学计算机科学计算系
（ 1、 清华大学计算机科学技术系
受到当前流数据系统中广泛应用的Sequence算子
