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» On the Efficiency of Provenance Queries
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ICDE
2006
IEEE
196views Database» more  ICDE 2006»
14 years 10 months ago
Closure-Tree: An Index Structure for Graph Queries
Graphs have become popular for modeling structured data. As a result, graph queries are becoming common and graph indexing has come to play an essential role in query processing. ...
Huahai He, Ambuj K. Singh
DASFAA
2008
IEEE
151views Database» more  DASFAA 2008»
13 years 10 months ago
Efficient Top-k Search Across Heterogeneous XML Data Sources
An important issue arising from XML query relaxation is how to efficiently search the top-k best answers from a large number of XML data sources, while minimizing the searching cos...
Jianxin Li, Chengfei Liu, Jeffrey Xu Yu, Rui Zhou
EDBT
2004
ACM
139views Database» more  EDBT 2004»
14 years 8 months ago
Efficient Distributed Skylining for Web Information Systems
Though skyline queries already have claimed their place in retrieval over central databases, their application in Web information systems up to now was impossible due to the distri...
Wolf-Tilo Balke, Ulrich Güntzer, Jason Xin Zh...
ECIR
2008
Springer
13 years 10 months ago
Using Coherence-Based Measures to Predict Query Difficulty
Abstract. We investigate the potential of coherence-based scores to predict query difficulty. The coherence of a document set associated with each query word is used to capture the...
Jiyin He, Martha Larson, Maarten de Rijke
ESA
2010
Springer
179views Algorithms» more  ESA 2010»
13 years 8 months ago
On Space Efficient Two Dimensional Range Minimum Data Structures
The two dimensional range minimum query problem is to preprocess a static two dimensional m by n array A of size N = m
Gerth Stølting Brodal, Pooya Davoodi, S. Sr...