651 search results - page 56 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Aggregate measures summarizing subsets of data are valuable in exploratory analysis and decision support, especially when dependent aggregations can be easily specified and compute...
MOBIHOC
2003
ACM
14 years 8 months ago
2003
ACM
Spatial query execution is an essential functionality of a sensor network, where a query gathers sensor data within a specific geographic region. Redundancy within a sensor networ...
GCC
2007
Springer
14 years 3 months ago
2007
Springer
Data integration has evolved to provide efficient data management across distributed and heterogeneous data sources in grid environment. However, existing works in data integratio...
MOBIHOC
2008
ACM
14 years 8 months ago
2008
ACM
Demands on better interacting with physical world require an effective and comprehensive collaboration mechanism among multiple heterogeneous sensor networks. Previous works mainl...
ICDE
2003
IEEE
14 years 10 months ago
2003
IEEE
Despite the recent proliferation of work on semistructured data models, there has been little work to date on supporting uncertainty in these models. In this paper, we propose a m...