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VLDB
2007
ACM
130views Database» more  VLDB 2007»
16 years 6 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
VLDB
2008
ACM
178views Database» more  VLDB 2008»
16 years 6 months ago
The Bdual-Tree: indexing moving objects by space filling curves in the dual space
Abstract Existing spatiotemporal indexes suffer from either large update cost or poor query performance, except for the Bx -tree (the state-of-the-art), which consists of multiple ...
Man Lung Yiu, Yufei Tao, Nikos Mamoulis
SIGMOD
2005
ACM
141views Database» more  SIGMOD 2005»
16 years 6 months ago
Integrating databases and workflow systems
There has been an information explosion in fields of science such as high energy physics, astronomy, environmental sciences and biology. There is a critical need for automated sys...
Srinath Shankar, Ameet Kini, David J. DeWitt, Jeff...
SIGMOD
2005
ACM
105views Database» more  SIGMOD 2005»
16 years 6 months ago
Reference Reconciliation in Complex Information Spaces
Reference reconciliation is the problem of identifying when different references (i.e., sets of attribute values) in a dataset correspond to the same real-world entity. Most previ...
Xin Dong, Alon Y. Halevy, Jayant Madhavan
SIGMOD
2005
ACM
150views Database» more  SIGMOD 2005»
16 years 6 months ago
BRAID: Stream Mining through Group Lag Correlations
The goal is to monitor multiple numerical streams, and determine which pairs are correlated with lags, as well as the value of each such lag. Lag correlations (and anticorrelation...
Yasushi Sakurai, Spiros Papadimitriou, Christos Fa...