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Description
  • Článek shrnuje logický přístup ke studiu preference a navrhuje její začlenění do relačních dotazovacích jazyků pomocí preferenčního operátoru parametrizovaného množinou preferencí různých druhu a vracejícího nejvíce preferované podmnožiny jeho argumentu - instance relace. Prezentována je také nova strategie algebraické optimalizace dotazu, založená na vztazích mezi preferenčním operátorem a ostatními operátory relační algebry. (cs)
  • Model complexity of feedforward neural networks is studied in terms of rates of variable-basis approximation. Sets of functions, for which the errors in approximation by neural networks with n hidden units converge to zero geometrically fast with increasing number n, are described. However, the geometric speed of convergence depends on parameters, which are specific for each function to be approximated. The results are illustrated by examples of estimates of such parameters for functions in infinite-dimensional Hilbert spaces.
  • Model complexity of feedforward neural networks is studied in terms of rates of variable-basis approximation. Sets of functions, for which the errors in approximation by neural networks with n hidden units converge to zero geometrically fast with increasing number n, are described. However, the geometric speed of convergence depends on parameters, which are specific for each function to be approximated. The results are illustrated by examples of estimates of such parameters for functions in infinite-dimensional Hilbert spaces. (en)
Title
  • Algebraic Optimization of Relational Queries with Various Kinds of Preferences
  • Algebraic Optimization of Relational Queries with Various Kinds of Preferences (en)
  • Algebraická optimalizace relačních dotazů s různými druhy preferencí (cs)
skos:prefLabel
  • Algebraic Optimization of Relational Queries with Various Kinds of Preferences
  • Algebraic Optimization of Relational Queries with Various Kinds of Preferences (en)
  • Algebraická optimalizace relačních dotazů s různými druhy preferencí (cs)
skos:notation
  • RIV/67985807:_____/08:00099178!RIV08-AV0-67985807
http://linked.open.../vavai/riv/strany
  • 388;399
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1ET100300419), Z(AV0Z10300504)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 355388
http://linked.open...ai/riv/idVysledku
  • RIV/67985807:_____/08:00099178
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • logic of preference; relational query; optimization (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [49ABD36EC6FE]
http://linked.open...v/mistoKonaniAkce
  • Nový Smokovec
http://linked.open...i/riv/mistoVydani
  • Berlin
http://linked.open...i/riv/nazevZdroje
  • SOFSEM 2008. Theory and Practice of Computer Science
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Nedbal, Radim
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Springer-Verlag
https://schema.org/isbn
  • 978-3-540-77565-2
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