641 search results - page 58 / 129 » Studying Query Expansion Effectiveness |
GLOBECOM
2006
IEEE
14 years 3 months ago
2006
IEEE
— We compare the performance of various dynamic query abolishment mechanisms in different unstructured overlay network topologies such as found in several P2P systems. We speci...
ATAL
2004
Springer
14 years 2 months ago
2004
Springer
Most people have long term information interests. Current Web search engines satisfy immediate information needs. Specific sites support tracking of long term interests. We prese...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
We introduce a convoy query that retrieves all convoys from historical trajectories, each of which consists of a set of objects that travelled closely during a certain time period....
VLDB
2004
ACM
14 years 9 months ago
2004
ACM
In this paper, we propose a new tunable index scheme, called iMinMax(), that maps points in highdimensional spaces to single-dimensional values determined by their maximum or minim...
IPPS
2006
IEEE
14 years 3 months ago
2006
IEEE
P2P Networks are highly dynamic structures since their nodes – peer users keep joining and leaving continuously. In the paper, we study the effects of network change rates on qu...