| 时空数据库中移动对象查询的选择性估算 |
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| 引用本文： | 吕国华,刘兆宏,袁正午,葛君伟,裴海英.时空数据库中移动对象查询的选择性估算[J].计算机应用,2005,25(11):2632-2634. |
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| 作者姓名： | 吕国华 刘兆宏 袁正午 葛君伟 裴海英 |
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| 作者单位： | 重庆邮电学院,中韩GIS研究所,重庆,400065;仁荷大学,信息通信学院,韩国,仁川,402-751 |
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| 摘 要： | 目前，用来估算查询选择性的最有效的技术是直方图技术。通过特定的改进，直方图也可应用到时空查询优化中。TPR 树在对未来预测的时空索引中显示了很好的优越性。结合TPR 树索引结构，构建满足时空查询的直方图，估算时空查询的选择性。
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| 关 键 词： | 选择性估算 时空数据查询 直方图 带时间参数的R-树 |
| 文章编号： | 1001-9081（2005）11-2632-03 |
| 收稿时间： | 2005-05-27 |
| 修稿时间： | 2005-05-272005-07-20 |
Selectivity estimation for moving objects query in spatio-temporal databases |
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| Lü Guo-hua,LIU Zhao-hong,YUAN Zheng-wu,GE Jun-wei,Hae-Young BAE.Selectivity estimation for moving objects query in spatio-temporal databases[J].journal of Computer Applications,2005,25(11):2632-2634. |
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| Authors: | Lü Guo-hua LIU Zhao-hong YUAN Zheng-wu GE Jun-wei Hae-Young BAE |
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| Abstract: | Presently, histogram is the most effective technique that is used to estimate the query selectivity. Histogram can also be used in spatio-temporal query optimization after some improvements. TPR-tree is more predominant than other indices in predictive spatio-temporal database indexing. With time-parameter R-tree, a novel spatio-temporal histogram was proposed to estimate the selectivity for spatio-temporal querying. |
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| Keywords: | selectivity estimation spatio-temporal queries histograms TPR-tree |
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