412 search results - page 55 / 83 » Aggregate queries over ontologies |
ICMCS
2006
IEEE
14 years 4 months ago
2006
IEEE
We present methods for improving text search retrieval of visual multimedia content by applying a set of visual models of semantic concepts from a lexicon of concepts deemed relev...
SIGMOD
2001
ACM
14 years 10 months ago
2001
ACM
Materialized views can provide massive improvements in query processing time, especially for aggregation queries over large tables. To realize this potential, the query optimizer ...
PODS
2005
ACM
14 years 10 months ago
2005
ACM
In sensor networks, data acquisition frequently takes place at lowcapability devices. The acquired data is then transmitted through a hierarchy of nodes having progressively incre...
ISR
2011
13 years 5 months ago
2011
Initially popularized by Amazon.com, recommendation technologies have become widespread over the past several years. However, the types of recommendations available to the users i...
SIGMOD
2004
ACM
14 years 10 months ago
2004
ACM
We are developing a distributed query processor called PIER, which is designed to run on the scale of the entire Internet. PIER utilizes a Distributed Hash Table (DHT) as its comm...