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107
Voted
EDBT
2009
ACM
113views Database» more  EDBT 2009»
15 years 5 months ago
Query ranking in probabilistic XML data
Twig queries have been extensively studied as a major fragment of XPATH queries to query XML data. In this paper, we study PXMLRANK query, (Q, k), which is to rank top-k probabili...
Lijun Chang, Jeffrey Xu Yu, Lu Qin
EDBT
2009
ACM
133views Database» more  EDBT 2009»
15 years 5 months ago
Multiplicative synopses for relative-error metrics
Existing hierarchical summarization techniques fail to provide synopses good in terms of relative-error metrics. This paper introduces multiplicative synopses: a summarization par...
Panagiotis Karras
86
Voted
ICS
2009
Tsinghua U.
15 years 5 months ago
Adagio: making DVS practical for complex HPC applications
Power and energy are first-order design constraints in high performance computing. Current research using dynamic voltage scaling (DVS) relies on trading increased execution time...
Barry Rountree, David K. Lowenthal, Bronis R. de S...
85
Voted
ICS
2009
Tsinghua U.
15 years 5 months ago
Parametric multi-level tiling of imperfectly nested loops
Tiling is a crucial loop transformation for generating high performance code on modern architectures. Efficient generation of multilevel tiled code is essential for maximizing da...
Albert Hartono, Muthu Manikandan Baskaran, C&eacut...
DATE
2009
IEEE
133views Hardware» more  DATE 2009»
15 years 5 months ago
Energy efficient multiprocessor task scheduling under input-dependent variation
— In this paper, we propose a novel, energy aware scheduling algorithm for applications running on DVS-enabled multiprocessor systems, which exploits variation in execution times...
Jason Cong, Karthik Gururaj