| 基于R-Tree的空间查询代价模型研究 |
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| 引用本文： | 张志兵,王元珍,李华旸.基于R-Tree的空间查询代价模型研究[J].小型微型计算机系统,2003,24(6):1017-1020. |
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| 作者姓名： | 张志兵 王元珍 李华旸 |
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| 作者单位： | 华中科技大学,计算机学院,湖北,武汉,430074 |
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| 基金项目： | 国家863基金(2001AA135190-02)资助. |
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| 摘 要： | 本文对基于R-Tree的空间查询代价模型进行了探讨，分析了Y．Theodoridis等提出的矩形密度模型^2，3]，利用其结果提出了代价估计的概率模型，并通过实验验证了概率模型的估计精确度较矩形密度模型有了显著的提高．
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| 关 键 词： | R－Tree 空间查询 代价模型 查询优化 空间数据库 |
| 文章编号： | 1000-1220(2003)06-1017-04 |
Research On the Cost Model for Spatial Queries Using R-Tree |
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| ZHANG Zhi bing,WANG Yuan zhen,LI Hua yang.Research On the Cost Model for Spatial Queries Using R-Tree[J].Mini-micro Systems,2003,24(6):1017-1020. |
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| Authors: | ZHANG Zhi bing WANG Yuan zhen LI Hua yang |
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| Abstract: | This paper discussed the cost models for spatial queries based on R Tree, and analyzed the model of rectangular density proposed by Theodoridis et al. The cost model based on probability was presented by making use of Theodoridis' works. The experiment shows that the accuracy of estimating by the model based on probability is remarkable better than that of the model based on rectangular density. |
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| Keywords: | R Tree spatial queries cost model optimization of queries spatial database |
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