标题: | 卡氏积档案的最佳化与图样资料的索引架构 A Study on Storage Organizations: Cartesian Product File Optimization and Iconic Indexing |
作者: | 周韵寰 Chou, Yun-Huan 杨维邦 Wei-Pang Yang 资讯科学与工程研究所 |
关键字: | 合查询;正交区间查询;二维字串;二维阶层字串;图样索引;Cartesian product file;partial match query;orthogonal range |
公开日期: | 1995 |
摘要: | 决定了欲存取的资料,所以要设计一个好的资料储存结构就必须要以查 询 般来说,查询可因查询的条件型式不同而区分为:部份吻合查询和正 交区间查询两种。所谓的部份吻合查询葑啮韝丑A某些资料栏位被限定为 单一 查询。若查询条件中,资料栏位被限定为一范围内的属性值而不是 单一的属性值时,这种查询即称为正交区间查询(ORQ)。只能针对资料的 单一属 及资料之多重属性的查询----PMQ和ORQ,来说,是无法保证一定 能有所助 有两种特别的资料结构,称为:分割醢序档案和搜寻树结构, 被提出来支 查询的效率。这里所说的‘档案’,系指由多重属性资料所 组成的资料档 醢序所得到的档案结构中,卡氏积档案是最典型的一种。 而正交区间查询 查询,且涵盖了部份吻合查询,因此,我们的研究即定 位在:设计与分析 的最佳卡氏积档案上。我们的目标是将此问题以各种 角度来探讨,包括: 找出益于正交区间查询的最佳卡氏积档案、萃取出 益于正交区间查询的最 各种特性,以及发展出一个快速的演算法来找寻 近似最佳的卡氏积档案。 对位置可以用来构成影像的另一种索引,这种 索引即称为图样索引。这种 像的存取,也提供使用者另外一种查询的方 式。有名的图样索引有二维字 等。由于图样索引储存在主记忆体中,因 此如何设计一个更经济的图样索 。在本论文中,我们提出了另一个新的 图样索引型式,它不仅节省更多的空间,同时在影像资料的存取上也较以 往的更有效率。 Users' queries determine what data will be retrieved, therefore good storage organization must be based on queries. In general, distinguished into partial match queries and orthogonal range partial match query (PMQ) is a query in which fields arengle values. If a query in which fields are restricted to a range of than a single value, then this kind of queries is called an query (ORQ). Because index structures only built on some onea, it is not guaranteed that those index structures are helpful for which queries involve more than one attribute of data. Thus, nds of data structures proposed to support systems where these types common: partitioned hashing file and search tree structure.t file (CPF) is a typical hashed files by partitioned hashing, and commonly used for contemporary queries and can be regarded asf PMQs. Hence our study intends to focus on the design andmal CPFs for ORQs. We intend to explore this problem in various find the optimal two-attribute CPF for ORQs, extract properties N-attribute CPF for ORQs, and develop a very fast algorithm to optimal CPFs for ORQs. The relative relationships among objects be organized into a kind of index for images. This kind ofonic index, not only speeds up the image retrieval, but also supports way. The most famous iconic indices proposed include 2D-string Iconic indices are stored in main memory, thus how to design a iconic index is very important. In this dissertation, we also new kind of iconic index, which saves more space and can be used image data more efficiently. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT840394071 http://hdl.handle.net/11536/60518 |
显示于类别: | Thesis |