1) Empty conjunction
空连接
2) bonding in vacuum
真空连接
3) spatial joins
空间连接
1.
Analytical cost model for spatial joins using R-trees;
基于R树的空间连接查询代价分析
2.
However,the exact intersection test of two spatial objects is the most timeconsuming and I/O-consuming step in processing spatial joins.
但是,两个空间对象的精确相交测试是空间连接过程中最耗时、最耗I/O的。
5) spatial join
空间连接
1.
Improved cost model for spatial joins using R-trees
改进的基于R树的空间连接代价模型
2.
R-tree spatial join algorithm BFGS (Breadth-First Group-based Sweeping) was introduced based on the breath-first group-based plane sweeping paradigm.
研究了一种基于广度优先搜索的层内分组扫描策略的R树空间连接新算法。
3.
After analyzing the previous researches on the spatial join, this paper introduced a new method, orthogonal polygons, to approximate actual spatial data in spatial access methods, and to join spatial relation based on R trees.
空间查询效率是衡量空间数据库性能的关键 ,而空间连接查询是最耗时、最重要的空间查询 。
6) spatio-temporal join
时空连接
补充资料：空急空巴
1.干着急﹐无可奈何。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条