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» Fast Exact MultiConstraint Shortest Path Algorithms
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IJRR
2008
75views more  IJRR 2008»
13 years 6 months ago
Planning Time-Minimal Safe Paths Amidst Unpredictably Moving Obstacles
In this paper we discuss the problem of planning safe paths amidst unpredictably moving obstacles in the plane. Given the initial positions and the maximum speeds of the moving ob...
Jur P. van den Berg, Mark H. Overmars
CIKM
2007
Springer
13 years 10 months ago
A fast unified optimal route query evaluation algorithm
We investigate the problem of how to evaluate, fast and efficiently, classes of optimal route queries on a massive graph in a unified framework. To evaluate a route query effectiv...
Edward P. F. Chan, Jie Zhang
WAW
2007
Springer
144views Algorithms» more  WAW 2007»
14 years 25 days ago
Approximating Betweenness Centrality
Betweenness is a centrality measure based on shortest paths, widely used in complex network analysis. It is computationally-expensive to exactly determine betweenness; currently th...
David A. Bader, Shiva Kintali, Kamesh Madduri, Mil...
WSDM
2010
ACM
199views Data Mining» more  WSDM 2010»
14 years 4 months ago
A Sketch-Based Distance Oracle for Web-Scale Graphs
We study the fundamental problem of computing distances between nodes in large graphs such as the web graph and social networks. Our objective is to be able to answer distance que...
Atish Das Sarma, Sreenivas Gollapudi, Marc Najork,...
FOCS
1993
IEEE
13 years 11 months ago
An On-Line Algorithm for Improving Performance in Navigation
We consider the following scenario. A point robot is placed at some start location ¡ in a 2dimensional scene containing oriented rectangular obstacles. The robot must repeatedly ...
Avrim Blum, Prasad Chalasani