Sergio Flesca – författare
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5 produkter
5 produkter
444 kr
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Research has deeply investigated several issues related to the use of integrity constraints on relational databases. In particular, a great deal of attention has been devoted to the problem of extracting "reliable" information from databases containing pieces of information inconsistent with regard to some integrity constraints. In this manuscript, the problem of extracting consistent information from relational databases violating integrity constraints on numerical data is addressed. Aggregate constraints defined as linear inequalities on aggregate-sum queries on input data are considered. The notion of repair as consistent set of updates at attribute-value level is exploited, and the characterization of several data-complexity issues related to repairing data and computing consistent query answers is provided. Moreover, a method for computing “reasonable” repairs of inconsistent numerical databases isintroduced, for a restricted but expressive class of aggregate constraints. An extension of this method for dealing with the data repairing problem in the presence of weak aggregate constraints which are expected to be satisfied, but not required to, is presented. Furthermore, a technique for computing consistent answers of aggregate queries in the presence of a wide form of aggregate constraints is provided. Finally, extensions of the framework as well as several open problems are discussed.
Del 13515 - Lecture Notes in Computer Science
Foundations of Intelligent Systems
26th International Symposium, ISMIS 2022, Cosenza, Italy, October 3–5, 2022, Proceedings
Häftad, Engelska, 2022
554 kr
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This book constitutes the proceedings of the 26th International Symposium on Foundations of Intelligent Systems, ISMIS 2022, held in Cosenza, Italy, in October 2022. The 31 regular papers, 11 short papers and 4 industrial papers presented in this volume were carefully reviewed and selected from 71 submissions.
Comprehensive Guide Through the Italian Database Research Over the Last 25 Years
Inbunden, Engelska, 2017
2 195 kr
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This book offers readers a comprehensive guide to the evolution of the database field from its earliest stages up to the present—and from classical relational database management systems to the current Big Data metaphor.
Comprehensive Guide Through the Italian Database Research Over the Last 25 Years
Häftad, Engelska, 2018
2 195 kr
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This book offers readers a comprehensive guide to the evolution of the database field from its earliest stages up to the present—and from classical relational database management systems to the current Big Data metaphor.
Logics in Artificial Intelligence
European Conference, JELIA 2002, Cosenza, Italy, September, 23-26, Proceedings
Häftad, Engelska, 2002
1 101 kr
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TheEuropeanConferenceonLogicsinAIprovidesamajorbiennialforumforthe discussion of logic-oriented approaches to arti?cial intelligence. Following pre- ous workshops held in France (1988), The Netherlands (1990), Germany (1992), England (1994), Portugal (1996), Germany (1998), and Spain (2000) the eighth conference was in Cosenza, Italy, September 23-26, 2002. The international level and the overall technical quality of this event is now well established. As a c- sequence, the Program Committee wished to explicitly mark JELIA 2002 as a milestone by promoting the event from a "Workshop" to a "Conference". Theaimwastobringtogetheractiveresearchersinterestedinallaspectsc- cerning the use of logics in arti?cial intelligence to discuss current research, - sults,problems,andapplicationsofboththeoreticalandpracticalnature. JELIA strived to foster links and facilitate cross-fertilization of ideas among researchers from various disciplines, among researchers from academia, industry, and g- ernment, and between theoreticians and practitioners. ThetechnicalprogramofJELIA2002comprisedthreeinvitedtalksthatwere given by Georg Gottlob, Michael Gelfond, and Moshe Y.Vardi and 41 refereed contributions selected by the Program Committee amongst more than 100 s- mittedpapers. Asapartofthetechnicalprogram,theconferencefeaturedas- cial session consisting of 11 system presentations. Finally, the program included three tutorials by V. S. Subrahamanian, Dino Pedreschi and Fosca Giannotti, and Gerald Pfeifer.