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PODS
1993
ACM
122views Database» more  PODS 1993»
14 years 1 days ago
Towards an Analysis of Range Query Performance in Spatial Data Structures
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...
Bernd-Uwe Pagel, Hans-Werner Six, Heinrich Toben, ...
ICDE
2009
IEEE
114views Database» more  ICDE 2009»
14 years 9 months ago
XOntoRank: Ontology-Aware Search of Electronic Medical Records
As the use of Electronic Medical Records (EMRs) becomes more widespread, so does the need for effective information discovery within them. Recently proposed EMR standards are XML-b...
Fernando Farfán, Vagelis Hristidis, Anand R...
ICDE
2006
IEEE
150views Database» more  ICDE 2006»
14 years 9 months ago
Efficient Aggregation of Ranked Inputs
A top-k query combines different rankings of the same set of objects and returns the k objects with the highest combined score according to an aggregate function. We bring to ligh...
Nikos Mamoulis, Kit Hung Cheng, Man Lung Yiu, Davi...
SIGMOD
2008
ACM
150views Database» more  SIGMOD 2008»
14 years 8 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
ICB
2009
Springer
137views Biometrics» more  ICB 2009»
14 years 2 months ago
Palmprint Recognition Based on Regional Rank Correlation of Directional Features
Abstract. Automatic personal identification based on palmprints has been considered as a promising technology in biometrics family during recent years. In pursuit of accurate palmp...
Yufei Han, Zhenan Sun, Tieniu Tan, Ying Hao