1) 4R-tree index
4R-树索引
1.
4R-tree index is a practical bitemporal index, which consists of four R-trees named R1, R2, R3 and R4 respectively.
4R-树索引是当前较为实用的双时态索引技术,它由R1、R2、R3和R4四棵相互独立的R-树构成。
3) B*Tree index
B*树索引
1.
This paper analyzes the structure and theory of B*B*Tree index and introduces how to use effectively B*B*Tree index to tuning database system.
本文从B*树索引入手,分析了B*树索引的结构及原理,阐明了如何正确合理地使用B*树索引及其如何优化数据库系统的性能。
4) B-tree index
B树索引
1.
This paper investigates and analyses the index mechanism in PostgreSQL system based on the most common B-tree index.
本文以最常用的B树索引为例,对PostgreSQL系统索引机制的建立进行了分析和探讨。
5) M-tree indexing
M树索引
1.
Considering the in-coordination of pitch and inaccuracy of rhythm information during melody input,average pitch difference and average duration percentage difference are counted as M-tree indexing keys.
考虑到各种音乐输入方式存在的音高不一致性和节奏伸缩性,系统根据乐曲旋律特征的总体变化,将平均音高差和平均音长变化百分比作为关键字建立M树索引结构。
补充资料:海南龙血树(小花龙血树)
百合科Liliaceae
乔木状,高3-4m。叶聚生于茎和枝顶,几呈套叠状,长约70cm,抱茎,无柄。圆锥花序长约30cm,花序轴无毛或近无毛。分布于海南西南部,生于背风区的干燥砂土上。越南、柬埔寨也有分布。国家三级保护濒危种。
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