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SIGMOD
2007
ACM
181views Database» more  SIGMOD 2007»
15 years 9 months ago
Progressive and selective merge: computing top-k with ad-hoc ranking functions
The family of threshold algorithm (i.e., TA) has been widely studied for efficiently computing top-k queries. TA uses a sort-merge framework that assumes data lists are pre-sorted...
Dong Xin, Jiawei Han, Kevin Chen-Chuan Chang
FSEN
2009
Springer
15 years 4 months ago
A Timed Calculus for Wireless Systems
We propose a timed process calculus for wireless systems exposed to communication collisions. The operational semantics of our calculus is given in terms of a labelled transition ...
Massimo Merro, Eleonora Sibilio
MCAM
2007
Springer
238views Multimedia» more  MCAM 2007»
15 years 3 months ago
A Three-Level Scheme for Real-Time Ball Tracking
A three-level method is proposed to achieve robust and real-time ball tracking in soccer videos. It includes object-, intra-trajectory-, and intertrajectory-level processing. Due t...
Xiaofeng Tong, Tao Wang, Wenlong Li, Yimin Zhang, ...
DSD
2006
IEEE
113views Hardware» more  DSD 2006»
15 years 3 months ago
Lifetime Analysis in Heterogeneous Sensor Networks
Wireless sensor networks (WSN) are composed of battery-driven communication entities performing multiple, usually different tasks. In order to complete a given task, all sensor no...
Falko Dressler, Isabel Dietrich
VISUALIZATION
2003
IEEE
15 years 2 months ago
Visualizing Spatial and Temporal Variability in Coastal Observatories
In this paper, we describe a set of 3D and 4D visualization tools and techniques for CORIE, a complex environmental observation and forecasting system (EOFS) for the Columbia Rive...
Walter Jiménez, Wagner Toledo Corrêa,...