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121
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SIGMOD
2010
ACM
210views Database» more  SIGMOD 2010»
15 years 20 days ago
Searching trajectories by locations: an efficiency study
Trajectory search has long been an attractive and challenging topic which blooms various interesting applications in spatial-temporal databases. In this work, we study a new probl...
Zaiben Chen, Heng Tao Shen, Xiaofang Zhou, Yu Zhen...
104
Voted
COCOON
2008
Springer
15 years 2 months ago
Approximating the Generalized Capacitated Tree-Routing Problem
In this paper, we introduce the generalized capacitated tree-routing problem (GCTR), which is described as follows. Given a connected graph G = (V, E) with a sink s V and a set M...
Ehab Morsy, Hiroshi Nagamochi
83
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COR
2006
94views more  COR 2006»
15 years 15 days ago
Computing obnoxious 1-corner polygonal chains
We consider an obnoxious facility location problem in which the facility is a trajectory consisting of a bounded length polygonal chain of two edges having extremes anchored at tw...
José Miguel Díaz-Báñez...
JPDC
2007
81views more  JPDC 2007»
15 years 11 days ago
Improved scheduling in rings
We study the problem of scheduling unit size jobs on n processors connected by a ring. We show a distributed algorithm for this problem with an approximation ratio of 3 2 + √ 2....
Dekel Tsur
ML
2008
ACM
156views Machine Learning» more  ML 2008»
15 years 13 days ago
On the connection between the phase transition of the covering test and the learning success rate in ILP
It is well-known that heuristic search in ILP is prone to plateau phenomena. An explanation can be given after the work of Giordana and Saitta: the ILP covering test is NP-complete...
Érick Alphonse, Aomar Osmani