390 search results - page 21 / 78 » Approximate Query Answering in Locally Closed Databases |
108
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JUCS
2010
14 years 4 months ago
2010
: We develop and study the concept of dataflow process networks as used for example by Kahn to suit exact computation over data types related to real numbers, such as continuous fu...
166
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VLDB
2005
ACM
15 years 10 months ago
2005
ACM
Abstract Declarative queries are proving to be an attractive paradigm for interacting with networks of wireless sensors. The metaphor that "the sensornet is a database" i...
CIDR
2003
14 years 11 months ago
2003
We present an architecture for a data sharing peer-to-peer system where the data is shared in the form of database relations. In general, peer-to-peer systems try to locate exactm...
181
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ICDE
2001
IEEE
15 years 11 months ago
2001
IEEE
We study the problem of approximately answering aggregation queries using sampling. We observe that uniform sampling performs poorly when the distribution of the aggregated attrib...
RSFDGRC
2005
Springer
15 years 3 months ago
2005
Springer
The paper concerns failing queries in incomplete Distributed Autonomous Information Systems (DAIS) based on attributes which are hierarchical and which semantics at different site...