计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
5期
112-115
,共4页
R树%空间聚类%空间数据%地理信息系统(GIS)
R樹%空間聚類%空間數據%地理信息繫統(GIS)
R수%공간취류%공간수거%지리신식계통(GIS)
R-tree%spatial-cluster%spatial data%Geographic Information System(GIS)
研究R树特点,考虑了离群点对R树结点构造的影响,结合改进的k-medoids 聚类算法提出了一种新的R树构造算法。与传统R树相比,新算法下构造的R树结点更加紧凑。通过实验证明,该优化算法构造的R树在查询性能方面的改进是明显的。
研究R樹特點,攷慮瞭離群點對R樹結點構造的影響,結閤改進的k-medoids 聚類算法提齣瞭一種新的R樹構造算法。與傳統R樹相比,新算法下構造的R樹結點更加緊湊。通過實驗證明,該優化算法構造的R樹在查詢性能方麵的改進是明顯的。
연구R수특점,고필료리군점대R수결점구조적영향,결합개진적k-medoids 취류산법제출료일충신적R수구조산법。여전통R수상비,신산법하구조적R수결점경가긴주。통과실험증명,해우화산법구조적R수재사순성능방면적개진시명현적。
This paper proposes a new method of constructing R-tree by studying its features, considering the outliers’ influence on constructing R-tree’s nodes and combining with improved k-medoids clustering algorithm. The R-tree based on this method has more compact structure compared with traditional R-tree. The results of the study show that, due to the optimization of structure, the improvement of R-tree in query efficiency is effectively.