166 search results - page 20 / 34 » Extending the Search Strategy in a Query Optimizer |
CORR
2010
Springer
13 years 4 months ago
2010
Springer
In this paper, we propose a stochastic model to describe how search service providers charge client companies based on users' queries for the keywords related to these compan...
WWW
2003
ACM
14 years 8 months ago
2003
ACM
RDF-based P2P networks have a number of advantages compared with simpler P2P networks such as Napster, Gnutella or with approaches based on distributed indices such as CAN and CHO...
WINE
2009
Springer
13 years 12 months ago
2009
Springer
Abstract. We study the use of viral marketing strategies on social networks that seek to maximize revenue from the sale of a single product. We propose a model in which the decisio...
CIKM
2010
Springer
13 years 6 months ago
2010
Springer
We consider the problem of learning to rank relevant and novel documents so as to directly maximize a performance metric called Expected Global Utility (EGU), which has several de...
FOCS
1998
IEEE
13 years 11 months ago
1998
IEEE
This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis [1981], this problem is solvable in polynom...