Results 11 to 20 of about 342,288 (312)

An Approach to Database Preference Queries Based on an Outranking Relation [PDF]

International Journal of Computational Intelligence Systems, 2012
In this paper, we describe an approach to database preference queries based on the notion of outranking, suited to the situation where preferences on different attributes are not commensurable.
Patrick Bosc, Olivier Pivert, Grégory Smits   +2 more
doaj   +2 more sources

LocText: relation extraction of protein localizations to assist database curation [PDF]

BMC Bioinformatics, 2018
Background The subcellular localization of a protein is an important aspect of its function. However, the experimental annotation of locations is not even complete for well-studied model organisms.
Juan Miguel Cejuela, Shrikant Vinchurkar, Tatyana Goldberg, Madhukar Sollepura Prabhu Shankar, Ashish Baghudana, Aleksandar Bojchevski, Carsten Uhlig, André Ofner, Pandu Raharja-Liu, Lars Juhl Jensen, Burkhard Rost   +10 more
doaj   +2 more sources

A relation merging technique for relational databases [PDF]

[1992] Eighth International Conference on Data Engineering, 2003
A merging technique for relational schemas consisting of relation-schemes, key dependencies, referential integrity constraints, and null constraints is presented. The author examines the conditions required for using this technique with relational database management systems that provide different mechanisms for maintaining null and referential ...
Victor Markowitz
openalex   +4 more sources

Interpretation of the glacial lake outburst floods database in relation to climatic conditions in different world regions

Acta Universitatis Carolinae Geographica
This article investigates the response of glacial lake outburst floods (GLOFs) to climatic conditions since the beginning of the 20th century and during individual seasons based on the data from the publicly available online database recording past GLOFs
Matouš Kovanda
doaj   +2 more sources

Performance Characterization of Image Feature Detectors in Relation to the Scene Content Utilizing a Large Image Database

IEEE Access, 2018
Selecting the most suitable local invariant feature detector for a particular application has rendered the task of evaluating feature detectors a critical issue in vision research. Although the literature, offers a variety of comparison works focusing on
Bruno Ferrarini, Shoaib Ehsan, Ales Leonardis, Naveed Ur Rehman, Klaus D. McDonald-Maier   +4 more
doaj   +2 more sources

Converting Relational Databases into Object-relational Databases. [PDF]

The Journal of Object Technology, 2010
This paper proposes an approach for migrating existing Relational DataBases (RDBs) into Object-Relational DataBases (ORDBs). The approach is superior to existing proposals as it can generate not only the target schema but also the data instances. The solution takes an existing RDB as input, enriches its metadata representation with required semantics ...
M. Akhtar Ali, Nick Rossiter, Abdelsalam M. Maatuk   +2 more
openaire   +1 more source

Computing the inverse of cardinal direction relations between regions

Journal of Intelligent Systems, 2022
The inversion of directions is an important operation with directions which plays an important role in qualitative spatial reasoning and spatial queries. In this work, we address on the inversion operation of the basic cardinal direction relations in the
Wang Miao, Fang Zhenxi, Liu Weiguang, Wang Xiaotong, Liu Xiaodong, Li Songyang   +5 more
doaj   +1 more source

Research and Implementation of Document-Relational Data Query Execution Tech-nology

Jisuanji kexue yu tansuo, 2020
With the arrival of the era of big data, Internet applications have produced abundant data types. Integ-rating storage, query and organization of data with various structures is a research hotspot of large data management system.
MA Zhicheng, YUAN Haifeng, GU Yang, LIU Yaru, ZHANG Xiao
doaj   +1 more source

Representation and Reasoning for Model of 3DR46 in Complex 3D Space

Jisuanji kexue yu tansuo, 2020
To remedy the deficiency of the existing methods on 3D direction relations, the 3DR46 direction relations model is proposed. The model can represent and distinguish 246 complex 3D direction relations. To process the dynamic of 3D direction relations, the
HAO Xiaohong, LI Song, HAO Zhongxiao
doaj   +1 more source

Uniform Reliability of Self-Join-Free Conjunctive Queries [PDF]

Logical Methods in Computer Science, 2022
The reliability of a Boolean Conjunctive Query (CQ) over a tuple-independent probabilistic database is the probability that the CQ is satisfied when the tuples of the database are sampled one by one, independently, with their associated probability.
Antoine Amarilli, Benny Kimelfeld
doaj   +1 more source