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» An Indexing Framework for Peer-to-Peer Systems
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IS
2006
13 years 9 months ago
Negations and document length in logical retrieval
Abstract. Terms which are not explicitly mentioned in the text of a document receive often a minor role in current retrieval systems. In this work we connect the management of such...
David E. Losada, Alvaro Barreiro
LOGCOM
2002
105views more  LOGCOM 2002»
13 years 8 months ago
Labelled Tableaux for Nonmonotonic Reasoning: Cumulative Consequence Relations
In this paper we present a labelled proof method for computing nonmonotonic consequence relations in a conditional logic setting. The method exploits the strong connection between...
Alberto Artosi, Guido Governatori, Antonino Rotolo
SIGMOD
2007
ACM
181views Database» more  SIGMOD 2007»
14 years 9 months ago
Progressive and selective merge: computing top-k with ad-hoc ranking functions
The family of threshold algorithm (i.e., TA) has been widely studied for efficiently computing top-k queries. TA uses a sort-merge framework that assumes data lists are pre-sorted...
Dong Xin, Jiawei Han, Kevin Chen-Chuan Chang
SSDBM
2002
IEEE
149views Database» more  SSDBM 2002»
14 years 2 months ago
A Cost Model for Interval Intersection Queries on RI-Trees
The efficient management of interval data represents a core requirement for many temporal and spatial database applications. With the Relational Interval Tree (RI-tree1 ), an effi...
Hans-Peter Kriegel, Martin Pfeifle, Marco Pöt...
SSD
2001
Springer
162views Database» more  SSD 2001»
14 years 1 months ago
Interval Sequences: An Object-Relational Approach to Manage Spatial Data
The design of external index structures for one- and multidimensional extended objects is a long and well studied subject in basic database research. Today, more and more commercia...
Hans-Peter Kriegel, Marco Pötke, Thomas Seidl