204 search results - page 34 / 41 » Containment of Conjunctive Queries with Negation: Algorithms... |
SIGIR
2004
ACM
14 years 1 months ago
2004
ACM
Multiple-topic and varying-length of web pages are two negative factors significantly affecting the performance of web search. In this paper, we explore the use of page segmentati...
ICDE
2006
IEEE
14 years 9 months ago
2006
IEEE
Given a set of multi-dimensional points, the skyline contains the best points according to any preference function that is monotone on all axes. In practice, applications that req...
SSD
2005
Springer
14 years 1 months ago
2005
Springer
This paper proposes and solves a-autonomy and k-stops shortest path problems in large spatial databases. Given a source s and a destination d, an aautonomy query retrieves a sequen...
WSDM
2009
ACM
14 years 2 months ago
2009
ACM
Temporal expressions, such as between 1992 and 2000, are frequent across many kinds of documents. Text retrieval, though, treats them as common terms, thus ignoring their inherent...
IPPS
2000
IEEE
14 years 3 days ago
2000
IEEE
This paper presents an efficient parallel information retrieval (IR) system which provides fast information service for the Internet users on lowcost high-performance PC-NOW enviro...