Sciweavers

2501 search results - page 1 / 501
» Logics with Rank Operators
Sort
View
LICS
2009
IEEE
13 years 11 months ago
Logics with Rank Operators
—We introduce extensions of first-order logic (FO) and fixed-point logic (FP) with operators that compute the rank of a definable matrix. These operators are generalizations o...
Anuj Dawar, Martin Grohe, Bjarki Holm, Bastian Lau...
SIGIR
1999
ACM
13 years 8 months ago
Using a Belief Revision Operator for Document Ranking in Extended Boolean Models
This paper claims that Belief Revision can be seen as a theoretical framework for document ranking in Extended Boolean Models. For a model of Information Retrieval based on propos...
David E. Losada, Alvaro Barreiro
CALCO
2011
Springer
235views Mathematics» more  CALCO 2011»
12 years 4 months ago
On the Fusion of Coalgebraic Logics
Fusion is arguably the simplest way to combine modal logics. For normal modal logics with Kripke semantics, many properties such as completeness and decidability are known to trans...
Fredrik Dahlqvist, Dirk Pattinson
SIGMOD
2005
ACM
164views Database» more  SIGMOD 2005»
14 years 4 months ago
RankSQL: Query Algebra and Optimization for Relational Top-k Queries
This paper introduces RankSQL, a system that provides a systematic and principled framework to support efficient evaluations of ranking (top-k) queries in relational database syst...
Chengkai Li, Kevin Chen-Chuan Chang, Ihab F. Ilyas...
KES
2006
Springer
13 years 4 months ago
Using Aggregation Operators to Personalize Agent-Based Medical Services
In previous papers we introduced HeCaSe2, a multi-agent system that helps doctors to follow the automatic application of clinical guidelines to patients. In this paper we show how ...
David Isern, Aïda Valls, Antonio Moreno