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» Approximate Temporal Aggregation
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IS
2006
13 years 6 months ago
Processing approximate aggregate queries in wireless sensor networks
In-network data aggregation has been recently proposed as an effective means to reduce the number of messages exchanged in wireless sensor networks. Nodes of the network form an a...
Antonios Deligiannakis, Yannis Kotidis, Nick Rouss...
PODS
2005
ACM
115views Database» more  PODS 2005»
14 years 6 months ago
Histograms revisited: when are histograms the best approximation method for aggregates over joins?
The traditional statistical assumption for interpreting histograms and justifying approximate query processing methods based on them is that all elements in a bucket have the same...
Alin Dobra
EDBT
2009
ACM
160views Database» more  EDBT 2009»
13 years 11 months ago
Estimating aggregates in time-constrained approximate queries in Oracle
The concept of time-constrained SQL queries was introduced to address the problem of long-running SQL queries. A key approach adopted for supporting time-constrained SQL queries i...
Ying Hu, Seema Sundara, Jagannathan Srinivasan
DKE
2007
119views more  DKE 2007»
13 years 6 months ago
Error minimization in approximate range aggregates
Histogram techniques have been used in many commercial database management systems to estimate a query result size. Recently, it has been shown that they are very effective to su...
Xuemin Lin, Qing Zhang, Yidong Yuan, Qing Liu
INFOCOM
2007
IEEE
14 years 1 months ago
Nearly Constant Approximation for Data Aggregation Scheduling in Wireless Sensor Networks
Abstract— Data aggregation is a fundamental yet timeconsuming task in wireless sensor networks. We focus on the latency part of data aggregation. Previously, the data aggregation...
Scott C.-H. Huang, Peng-Jun Wan, Chinh T. Vu, Ying...