计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (35): 139-142.

• 数据库、信号与信息处理 • 上一篇    下一篇

移动环境下的连续概率Skyline查询

曹金凤,董一鸿,陈华辉,王 勇   

  1. 宁波大学 计算机科学技术研究所,浙江 宁波 315211
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-12-11 发布日期:2011-12-11

Continuous probabilistic Skyline query in moving environment

CAO Jinfeng,DONG Yihong,CHEN Huahui,WANG Yong   

  1. Institute of Computer Science & Technology,Ningbo University,Ningbo,Zhejiang 315211,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-12-11 Published:2011-12-11

摘要: 主要研究查询点固定,目标对象移动且移动对象在位置不确定的情况下,成为Skyline对象的可能性(采用概率形式表示),并实现移动对象位置不确定条件下的连续Skyline查询。定义了影响P-Skyline集合的Events,提出了一个基于事件的算法E-CPS,该算法并通过计算,跟踪和处理Events来更新P-Skyline集合。该方法大大减少了算法的查找和计算开销,提高了运算效率。

关键词: 不确定数据, 移动对象, Skyline概率, 支配概率, 概率Skyline查询

Abstract: This paper discusses the probability that any moving object can be the Skyline object.Two types of events are defined that will affect the P-Skyline set,by tracting and calculating those events,the P-Skyline of any time can be found out speedly.Based on the analysis,an event-based algorithm(E-CPS) is proposed to handle cotinuous probabilistic Skyline queries.The effectiveness of the algorithm is expermentally verified.

Key words: uncertain data, moving object, Skyline probability, dominant probability, probabilistic Skyline query