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Bi-objective Optimization for Approximate Query Evaluation.
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Yarygina A., Novikov B.
A problem of effective and efficient approximate query evaluation is addressed as a special case of multi-objective optimization with 2 criteria: the computational resources and the quality of result. The proposed optimization and execution model provides for interactive trade of quality for speed.
In book
Vol. 539: ommunications in Computer and Information Science. , Springer, 2015
Мендкович Н. А., Kuznetsov S. D., Труды Института системного программирования РАН 2012 Т. 23 С. 195-214
The presented overview is concerned with lexical query optimization and covers papers published in the last four decades. The paper consists of five sections. The first section – Introduction – classifies query optimization techniques into semantic optimizations and lexical optimizations. Semantic optimizations usually relies on data integrity rules that are stores within metadata part of ...
Added: November 1, 2017
Dombrovskaya H., Boris Novikov, Bailliekova A., Berkeley : Apress, 2021
The book begins with a discussion of what a performant system is and progresses to measuring performance and setting performance goals. It introduces different classes of queries and optimization techniques suitable to each, such as the use of indexes and specific join algorithms. You will learn to read and understand query execution plans along with ...
Added: July 5, 2021
Beklaryan L., Akopov Andranik, Beklaryan Armen et al., , in : Тезисы докладов 11-й конференции Интеллектуализация обработки информации. : М. : Торус Пресс, 2016. P. 189-189.
Actual problems of modeling of ecologic-economic systems on the example of the Republic of Armenia (RA) are considered. ...
Added: April 1, 2017
Akopov A. S., Beklaryan L., Thakur M., IEEE Transactions on Intelligent Transportation Systems 2022 Vol. 23 No. 8 P. 12648-12664
Over the past two decades, several simulation-based approaches have been developed to seek optimal solutions in complex multiagent systems (MASs). One example of these complex systems is the proposed multiagent fuzzy transportation system (FTS), in which agents, such as manned ground vehicles (MGVs) and unmanned ground vehicles (UGVs), use fuzzy logic for maneuvering while interacting ...
Added: October 7, 2021
С.Д. Кузнецов, Труды Института системного программирования РАН 2020 Т. 32 № 1 С. 153-180
Many experts in the field of data management believe that the emergence of non-volatile byte-addressable main memory (NVM) available for practical use will lead to the development of a new type of ultra-high-speed database management systems (DBMS) with single-level data storage (native in-NVM DBMS). However, the number of researchers who are actively engaged in research ...
Added: October 31, 2020
С.Д. Кузнецов, Мендкович Н. А., Труды Института системного программирования РАН 2013 Т. 25 С. 113-130
This paper describes enhanced algorisms of lexical optimization query. These algorisms detect and remove redundant conditions from query restriction to simplify it. The paper also presents results of implementation of these optimization techniques and those effects on query processing speed. The paper includes four sections. The first section (Introduction) provides general context of the paper. ...
Added: November 6, 2017
Vorontsov K. V., Kochedykov D., Apishev M. et al., IEEE Computer Society, 2017
Topic modelling is an area of text mining that has been actively developed in the last 15 years. A probabilistic topic model extracts a set of hidden topics from a collection of text documents. It defines each topic by a probability distribution over words and describes each document with a probability distribution over topics. In ...
Added: December 6, 2019
Yarygina A., Novikov B., Computer Science and Information Systems 2014 Vol. 11 No. 1 P. 69-88
Queryoptimizationtechniquesareprovedtobeessentialforhighperfor- mance of database management systems. In the context of new querying paradigms, such as similarity based search, exact query evaluation is neither computationally feasible nor meaningful, and approximate query evaluation is the only reasonable option.
In this paper a problem of resource allocation for approximate evaluation of com- plex queries is considered. An approximate algorithm ...
Added: March 23, 2019
Potocki A., Polukhin A., Drobyazko G. et al., , in : Knowledge Engineering and the Semantic Web. 4th Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings. Vol. 394.: Berlin : Springer, 2013. P. 171-131.
In the last years native RDF stores made enormous progress in closing the performance gap compared to RDBMS. This albeit smaller gap, however, still prevents adoption of RDF stores in scenarios with high requirements on responsiveness. We try to bridge the gap and present a native RDF store “OntoQuad” and its fundamental design principles. Basing ...
Added: October 14, 2014
Rodríguez-Muro M., Kontchakov R., Zakharyaschev M., , in : The Semantic Web – ISWC 2013. Proceedings of12th International Semantic Web Conference, Part I. : Cham : Springer, 2013. Ch. 35. P. 558-573.
We present the architecture and technologies underpinning the OBDA system Ontop and taking full advantage of storing data in relational databases. We discuss the theoretical foundations of Ontop: the tree-witness query rewriting,T-mappings and optimisations based on database integrity constraints and SQL features. We analyse the performance of Ontop in a series of experiments and demonstrate ...
Added: March 26, 2015
S. Kuznetsov, , in : Actual Problems of Systems and Software Engineering APSSE 2019 (Invited Papers). : Los Alamitos, Washington, Tokyo : IEEE Computer Society, 2019. P. 77-89.
Many experts in the field of data management believe that the emergence of non-volatile byte-addressable main memory (NVM) available for practical use will lead to the development of a new type of ultra-high-speed database management systems (DBMS) with single-level data storage (native in-NVM DBMS). However, the number of researchers who are actively engaged in research ...
Added: October 31, 2020
С.Д, Кузнецов, Мендкович Н. А., Труды Института системного программирования РАН 2013 Т. 25 С. 113-130
This paper describes enhanced algorisms of lexical optimization query. These algorisms detect and remove redundant conditions from query restriction to simplify it. The paper also presents results of implementation of these optimization techniques and those effects on query processing speed. The paper includes four sections. The first section (Introduction) provides general context of the paper. ...
Added: January 30, 2018