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» Challenges for Event Queries over Markovian Streams
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DMSN
2009
ACM
15 years 4 months ago
Validated cost models for sensor network queries
Generating a good execution plan for a declarative query has long been a central problem in data management research. With the rise in interest in wireless sensor networks (WSNs) ...
Christian Y. A. Brenninkmeijer, Ixent Galpin, Alva...
CIDR
2009
139views Algorithms» more  CIDR 2009»
14 years 11 months ago
Inter-Operator Feedback in Data Stream Management Systems via Punctuation
High-volume, high-speed data streams may overwhelm the capabilities of stream processing systems; techniques such as data prioritization, avoidance of unnecessary processing and o...
Rafael Fernández-Moctezuma, Kristin Tufte, ...
ICDE
2006
IEEE
144views Database» more  ICDE 2006»
15 years 11 months ago
Network-Aware Operator Placement for Stream-Processing Systems
To use their pool of resources efficiently, distributed stream-processing systems push query operators to nodes within the network. Currently, these operators, ranging from simple...
Peter R. Pietzuch, Jonathan Ledlie, Jeffrey Shneid...
VLDB
2007
ACM
130views Database» more  VLDB 2007»
15 years 10 months ago
A Simple and Efficient Estimation Method for Stream Expression Cardinalities
Estimating the cardinality (i.e. number of distinct elements) of an arbitrary set expression defined over multiple distributed streams is one of the most fundamental queries of in...
Aiyou Chen, Jin Cao, Tian Bu
DMSN
2007
ACM
15 years 1 months ago
A graph-based approach to vehicle tracking in traffic camera video streams
Vehicle tracking has a wide variety of applications, from law enforcement to traffic planning and public safety. However, the image resolution of the videos available from most tr...
Hamid Haidarian Shahri, Galileo Namata, Saket Navl...