62 search results - page 12 / 13 » Containment of Conjunctive Queries over Databases with Null ... |
SAC
2009
ACM
13 years 12 months ago
2009
ACM
Today user-centered information acquisition over collections of complex XML documents is increasingly in demand. To this end, preferences have become an important paradigm enablin...
SSIAI
2000
IEEE
13 years 9 months ago
2000
IEEE
This paper describes a content-based image retrieval system that employs both higher-level and lower-level vision methodologies separately and in conjunction for the retrieval of ...
WWW
2006
ACM
14 years 5 months ago
2006
ACM
It has become a promising direction to measure similarity of Web search queries by mining the increasing amount of clickthrough data logged by Web search engines, which record the...
ICDT
2010
ACM
14 years 2 months ago
2010
ACM
We consider a fragment of XPath named `forward-XPath', which contains all descendant and rightwards sibling axes as well as data equality and inequality tests. The satisfiabi...
BMCBI
2008
13 years 5 months ago
2008
Background: A new algorithm has been developed for generating conservation profiles that reflect the evolutionary history of the subfamily associated with a query sequence. It is ...