1672 search results - page 28 / 335 » Optimizing Monitoring Queries over Distributed Data |
DEXA
2008
Springer
14 years 12 months ago
2008
Springer
In this research, we propose to use the discrete cosine transform to approximate the cumulative distributions of data cube cells' values. The cosine transform is known to have...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
We study XML stream-specific schema-based optimization. We assume a widely-adopted automata-based execution model for XQuery evaluation. Criteria are established regarding what s...
DEBS
2007
ACM
15 years 2 months ago
2007
ACM
Queries for composite events typically involve the four complementary dimensions of event data, event composition, relationships between events (esp. temporal and causal), and acc...
SEMWEB
2009
Springer
15 years 4 months ago
2009
Springer
The Web of Linked Data forms a single, globally distributed dataspace. Due to the openness of this dataspace, it is not possible to know in advance all data sources that might be r...
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DEBS
2008
ACM
14 years 12 months ago
2008
ACM
We introduce a new type of query, called a real-time continuous query (RCQ), that captures the real-time requirements of processing data streams. We develop techniques to efficien...