计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (9): 130-133.

• 数据库、信号与信息处理 • 上一篇    下一篇

移动对象预测聚集范围查询方法

何茂顺,董一鸿,付世昌   

  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:2011-03-21 发布日期:2011-03-21

Method of predictive range aggregation for moving objects

HE Maoshun,DONG Yihong,FU Shichang   

  1. Institute of Computer Science & Technology,Ningbo University,Ningbo,Zhejiang 315211,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-03-21 Published:2011-03-21

摘要: 为了更好地实现预测范围聚集查询,提出了aTPRA-tree。TPR-tree随着时间的推移,性能不断恶化。aTPRA-tree是基于TPR-tree,它考虑了移动对象的方向角度进行构造,减小了结点面积和结点重叠面积,并且在索引结点中增加了聚集信息。实验结果表明,在更新和预测范围聚集查询性能方面,aTPRA-tree性能优于TPR-tree。

关键词: 预测范围聚集查询, 时间参数化的R-tree(TPR-tree), 基于方向角度的聚集TPR-tree(aTPRA-tree), 移动对象

Abstract: In order to realize the predictive range aggregate queries better,this paper presents the aTPRA-tree.TPR-tree’s performance continues to deteriorate as the time goes.The aTPRA-tree,which is based on the TPR-tree and added with aggregate information in the index nodes,considers the angle of the velocity and reduces the area and overlap of the nodes.The experimental results show that aTPRA-tree’s update and query performance outperforms the TPR-tree.

Key words: predictive range aggregate queries, Time-Parameterized R-tree(TPR-tree), the aggregation TPR-tree based on the Angle(aTPRA-tree), moving objects