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» Aggregation functions: Means
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RECSYS
2009
ACM
14 years 2 months ago
Rating aggregation in collaborative filtering systems
Recommender systems based on user feedback rank items by aggregating users’ ratings in order to select those that are ranked highest. Ratings are usually aggregated using a weig...
Florent Garcin, Boi Faltings, Radu Jurca, Nadine J...
DLOG
2003
13 years 8 months ago
Rewriting Aggregate Queries using Description Logic
This paper presents an application of a DL reasoner to the optimization of an object-relational query language. Queries containing aggregate functions are difficult to optimize be...
David DeHaan, David Toman, Grant E. Weddell
ADC
2009
Springer
140views Database» more  ADC 2009»
14 years 2 months ago
Score Aggregation Techniques in Retrieval Experimentation
Comparative evaluations of information retrieval systems are based on a number of key premises, including that representative topic sets can be created, that suitable relevance ju...
Sri Devi Ravana, Alistair Moffat
IPMU
2010
Springer
13 years 6 months ago
Aggregation Functions with Stronger Types of Monotonicity
Following the ideas of stronger forms of monotonicity for unary real functions and for capacities, k-monotone and strongly kmonotone aggregation functions are introduced and discus...
Erich-Peter Klement, Maddalena Manzi, Radko Mesiar
DAWAK
2008
Springer
13 years 8 months ago
Top_Keyword: An Aggregation Function for Textual Document OLAP
For more than a decade, researches on OLAP and multidimensional databases have generated methodologies, tools and resource management systems for the analysis of numeric data. With...
Franck Ravat, Olivier Teste, Ronan Tournier, Gille...