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CIKM
2006
Springer
15 years 10 months ago
Approximate reverse k-nearest neighbor queries in general metric spaces
In this paper, we propose an approach for efficient approximative RkNN search in arbitrary metric spaces where the value of k is specified at query time. Our method uses an approx...
Elke Achtert, Christian Böhm, Peer Kröge...
CLEF
2009
Springer
15 years 7 months ago
Formulating Good Queries for Prior Art Search
In this paper we describe our participation in CLEF-IP 2009 (prior art search task). This was the first year of the task and we focused on how to build effectively a prior art quer...
José Carlos Toucedo, David E. Losada
SPIRE
2010
Springer
15 years 5 months ago
Standard Deviation as a Query Hardness Estimator
In this paper a new Query Performance Prediction method is introduced. This method is based on the hypothesis that different score distributions appear for ‘hard’ and ‘easyâ...
Joaquín Pérez-Iglesias, Lourdes Arau...
ICDE
2009
IEEE
165views Database» more  ICDE 2009»
16 years 8 months ago
Expressive Location-Based Continuous Query Evaluation with Binary Decision Diagrams
Many location-based services require rich and expressive query language support for filtering large amounts of information. In prominent location-based services thousands of conti...
Zhengdao Xu, Hans-Arno Jacobsen
GIS
2003
ACM
16 years 7 months ago
Nearest neighbor queries in road networks
With wireless communications and geo-positioning being widely available, it becomes possible to offer new e-services that provide mobile users with information about other mobile ...
Christian S. Jensen, Jan Kolárvr, Torben Ba...