【作者】 刘欣； 刘国华； 刘通； 余靖；

【机构】 燕山大学信息科学与工程学院；

【摘要】 <正>1引言"轮廓体"这个概念在2005年VLDB会议上首次被提出来,它将单一轮廓查询问题的讨论加深为多个轮廓查询问题的综合研究,成为一个新兴的研究方向,是空间数据库领域研究的热点。轮廓体查更多还原

【Abstract】 The technology of skyline cube query is a new and important task.The computation of skyline cube has received considerable attention in conventional databases and spatial database,but the existing algorithms are inapplicable to stream applications because they assume static data that are stored in the disk rather than continuously ar riving or expiring,and they focus on"one-time"execution that returns a single skyline in contrast to constantly tracking skyline cube changes.In this paper,the architecture of skyline cube in the stream environment is firstly proposed to avoid those drawbacks,and then every module and its algorithm are analyzed in detail,finally the efficiency of the architecture is estimated with extensive experiments which can quickly track skyline cube changes, guarantee the updating of skyline cube real-time,and the results are exact and effective.更多还原