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» Data Stream Management Systems for Computational Finance
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PODS
2009
ACM
113views Database» more  PODS 2009»
15 years 10 months ago
Relative information completeness
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
Wenfei Fan, Floris Geerts
SIGMOD
2007
ACM
146views Database» more  SIGMOD 2007»
15 years 9 months ago
Distributed query evaluation with performance guarantees
Partial evaluation has recently proven an effective technique for evaluating Boolean XPath queries over a fragmented tree that is distributed over a number of sites. What left ope...
Gao Cong, Wenfei Fan, Anastasios Kementsietsidis
PODS
2004
ACM
158views Database» more  PODS 2004»
15 years 9 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
WSDM
2009
ACM
104views Data Mining» more  WSDM 2009»
15 years 4 months ago
Top-k aggregation using intersections of ranked inputs
There has been considerable past work on efficiently computing top k objects by aggregating information from multiple ranked lists of these objects. An important instance of this...
Ravi Kumar, Kunal Punera, Torsten Suel, Sergei Vas...
RTSS
2009
IEEE
15 years 4 months ago
Spatiotemporal Delay Control for Low-Duty-Cycle Sensor Networks
—Data delivery is a major function of sensor network applications. Many applications, such as military surveillance, require the detection of interested events to be reported to ...
Yu Gu, Tian He, Mingen Lin, Jinhui Xu