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» Algorithms for the Database Layout Problem
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ICDE
2007
IEEE
205views Database» more  ICDE 2007»
16 years 8 months ago
Multi-source Skyline Query Processing in Road Networks
Skyline query processing has been investigated extensively in recent years, mostly for only one query reference point. An example of a single-source skyline query is to find hotel...
Ke Deng, Xiaofang Zhou, Heng Tao Shen
VLDB
2007
ACM
107views Database» more  VLDB 2007»
16 years 6 months ago
VGRAM: Improving Performance of Approximate Queries on String Collections Using Variable-Length Grams
Many applications need to solve the following problem of approximate string matching: from a collection of strings, how to find those similar to a given string, or the strings in ...
Chen Li, Bin Wang, Xiaochun Yang
SIGMOD
2008
ACM
150views Database» more  SIGMOD 2008»
16 years 6 months ago
Ranking queries on uncertain data: a probabilistic threshold approach
Uncertain data is inherent in a few important applications such as environmental surveillance and mobile object tracking. Top-k queries (also known as ranking queries) are often n...
Ming Hua, Jian Pei, Wenjie Zhang, Xuemin Lin
SIGMOD
2004
ACM
163views Database» more  SIGMOD 2004»
16 years 6 months ago
Constraint-Based XML Query Rewriting For Data Integration
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
Cong Yu, Lucian Popa
SIGMOD
2003
ACM
141views Database» more  SIGMOD 2003»
16 years 6 months ago
QC-Trees: An Efficient Summary Structure for Semantic OLAP
Recently, a technique called quotient cube was proposed as a summary structure for a data cube that preserves its semantics, with applications for online exploration and visualiza...
Laks V. S. Lakshmanan, Jian Pei, Yan Zhao