• A functional index can specify different access methods that include B-Tree, R-Tree, and user-defined access methods.

    函数索引可以指定各种不同访问方法包括B -Treer - Tree用户定义的访问方法。

    youdao

  • Index options like UNIQUE and CLUSTER, and access methods like B-Tree, R-Tree and user-defined access methods can apply to both functional and non-functional indexes.

    诸如uniqueCLUSTER等索引选项以及B -Treer -Tree访问方法用户定义的访问方法,可以同时应用函数索引和非函数索引。

    youdao

  • In this example we show you how to create a functional index that USES the R-Tree access method.

    中,我们将向展示如何创建使用r - Tree访问方法的函数索引

    youdao

  • Since the data is spatial, you need to specify the R-Tree access method for this index.

    由于涉及到空间数据需要这个索引指定r - Tree访问方法

    youdao

  • Example: Functional index using R-Tree access method.

    示例使用r - Tree访问方法函数索引

    youdao

  • Some interesting facts about functional R-Tree indexes are.

    下面列出了r - Tree函数索引一些有趣特性。

    youdao

  • Specify the R-Tree access method.

    指定r - Tree访问方法。

    youdao

  • On the basis of fuzzy set theory, the peper considers thestorage reliability of military equipment by using fuzzy tree analysis with L - R fuzzy numbers.

    模糊理论基础上应用L-R模糊模糊故障分析技术,探讨了装备贮存可靠性的研究问题。

    youdao

  • In this paper, a robust and effective decision tree improved model R-C4.5 and its simplified version are introduced.

    论文提出了一种健壮有效决策改进模型R - C4.5及其简化版本。

    youdao

  • In D1LP-R, a role encapsulates some rights, different roles can be organized as a role tree, and the rights of each role contain all of its sub-roles.

    D1LP R中,角色对应一些访问权限不同角色形成一个角色,树中一个结点对应权限包含所有子结点对应的权限。

    youdao

  • Secondly every Huffman tree must have following structure code, data, weight, parent, l-child and r-child but only code and data are needed in decoding .

    而且棵哈夫曼都必须以下结构编码信息频度,双亲,左孩子,右孩子。

    youdao

  • It is proved that the R-rotation graph of a elementary coronoid system is a multiple directed rooted tree containing at least 2 trees.

    如果冠状系统基本,已经证明R -旋转至少包含2棵

    youdao

  • QR-Tree index combines the advantage of Quadtree and R-Tree, not only serves the need of high storing efficiency, but also avoid of many invalidation query, in order to achieve good query capability.

    索引结合R-树各自优点可以满足较高存储效率避免太多无效查找达到较好的查找性能

    youdao

  • Compared with grid and R-tree, the index has slightly space costs but most higher index performance.

    网格索引R树索引相比索引略大空间开销换取了更高的查找性能。

    youdao

  • On the basis of this model , the author put forward a R-tree based Composite Spatiotemporal Index (CST-TREE) and described its structure and mechanism.

    并在模型提出一个基于R复合时空索引CST-TREE机制,定义了节点结构分析、描述了此索引的结构原理。

    youdao

  • According to the characteristics of spatial index of grids and R-tree, a hybrid structure of spatial multilevel index is presented based on grid and R-tree.

    结合网格索引R树索引特点提出一种基于网格R树的多级混合索引。

    youdao

  • We implement the R-tree indexing in SADBS which is a spatial analysis database system developed by us.

    在所研究空间分析数据库系统SADBS实现R索引

    youdao

  • R-tree is a dynamic index tree of space search. Its structure use multi-dimensional region to express spatial data object. R-tree is a valid way to visit rectangle.

    空间搜索动态索引结构利用多个维中的区间表示空间数据对象,它是矩形访问一种有效方法

    youdao

  • The R-tree is a commonly used index structure of spatial data.

    常用空间数据索引结构

    youdao

  • QR-tree, a spatial index structure based on R-tree and a kind of space partition method using Quad-tree, is proposed. Its data structure and algorithms are also stated.

    提出基于R-树“四树”空间层次划分空间索引结构QR-树,给出了数据结构算法描述

    youdao

  • That is to say, for very large spatial databases, QR-tree processes more superiority than R-tree.

    也就是说对于大型空间数据库索引来说,QR -树与R -树相比整体性能上具有明显的优势。

    youdao

  • We implement the R-tree indexing in SADBS which is a spatial analysis data...

    在所研究空间分析数据库系统SADBS实现R索引

    youdao

  • A rectangular region of geography is roughly partitioned in several times to multilevel sub-regions, in which spatial index of R-tree has been constructed.

    方案首先将矩形地理空间进行租网格划分建立多级网格索引,然后针对每个小网格建立基于R空间索引。

    youdao

  • We implement the R-tree indexing in SADBS which is a spatial analysis database system...

    在所研究空间分析数据库系统SADBS实现R索引

    youdao

  • Representation of direction relations and the retrieve of such relations based on R-tree;

    基于区间值及其运算性质给出了不确定区域间方向关系表示及推理方法。

    youdao

  • Representation of direction relations and the retrieve of such relations based on R-tree;

    基于区间值及其运算性质给出了不确定区域间方向关系表示及推理方法。

    youdao

$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定