نتایج جستجو برای: database indexing

تعداد نتایج: 281099  

Journal: :تحقیقات کتابداری و اطلاع رسانی دانشگاهی 0
نجلا حریری دانشیار گروه علم اطلاعات و دانش شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران شیده احمدی دانشجوی کارشناسی ارشد علم اطلاعات و دانش شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران

the purpose of this study was to determine influence on indexing language in ranking the results of image searching in the google search engine. an experimental method was conducted. the population in this study was 30 old stamps of the years 1952 to 1978. for doing this study, two sites were designed on the web. in the first site 30 images were uploaded based on the controlled language and in ...

1991
Christopher Wade Clifton Hector Garcia-Molina Rafael Alonso

Documents, pictures, and other such non-quantitative information pose interesting new problems in the database world. Such data has traditionally been stored in file systems, which do not provide the security, integrity, or query features of database management systems. We have developed HyperFile, a data server that provides query facilities (as well as some other database features) while main...

1998
TOLGA BOZKAYA Meral Ozsoyoglu

by TOLGA BOZKAYA This thesis proposes index structures for efficient evaluation of temporal queries in temporal databases and similarity based queries in multimedia databases. To support temporal operators and to increase the efficiency of temporal queries, indexing based on temporal attributes is required. A temporal database can support two notions of time. Valid time is the time when a data ...

2009
Tomás Skopal Benjamin Bustos

Metric access methods (MAMs) serve as a tool for speeding similarity queries. However, all MAMs developed so far are index-based; they need to build an index on a given database. The indexing itself is either static (the whole database is indexed at once) or dynamic (insertions/deletions are supported), but there is always a preprocessing step needed. In this paper, we propose D-file, the first...

1999
Marcel Kornacker

Today’s object-relational DBMSs (ORDBMSs) are designed to support novel application domains by providing an extensible architecture, supplemented by domain-specific database extensions supplied by external vendors. An important aspect of ORDBMSs is support for extensible indexing, which allows the core database server to be extended with external access methods (AMs). This paper describes a new...

2001
Chiara Ghirardini Soon Ae Chun Vijayalakshmi Atluri Ibrahim Kamel Nabil R. Adam

This paper presents a performance analysis of indexing structures for the satellite image database. The unique features of this database are that the images vary in resolution level and time of capture, but cover the same geographic area. Each image belongs to one of the following types: raw, processed, vegetation, temperature, water, and color. We are particularly interested in comparing the s...

1990
Bernhard Nebel Christof Peltason

Reasoning with terminological logics is a subbeld in the area of knowledge representation that evolved from the representation language kl-one. Its main purpose is to automatically determine the location of a a new concept description (or object description) in a partially ordered set of given concepts. It seems to be a promising approach to apply the techniques developed in this area to the de...

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