641 search results - page 47 / 129 » Studying Query Expansion Effectiveness |
GIS
2008
ACM
14 years 8 months ago
2008
ACM
Given a spatial crime data warehouse, that is updated infrequently and a set of operations O as well as constraints of storage and update overheads, the index type selection probl...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
The prevalent use of XML highlights the need for a generic, flexible access-control mechanism for XML documents that supports efficient and secure query access, without revealing ...
ICDE
2011
IEEE
12 years 11 months ago
2011
IEEE
— An approximate string query is to find from a collection of strings those that are similar to a given query string. Answering such queries is important in many applications su...
CSCW
2004
ACM
14 years 1 months ago
2004
ACM
The lack of lightweight communication channels and other technical and sociological difficulties make it hard for new members of a non-collocated software development team to lea...
SSD
2005
Springer
14 years 1 months ago
2005
Springer
We study the problem of answering spatial queries in databases where objects exist with some uncertainty and they are associated with an existential probability. The goal of a thre...