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WINET
2010
159views more  WINET 2010»
13 years 5 months ago
Approximation algorithm for minimal convergecast time problem in wireless sensor networks
In this paper we consider how to collect data from sensors deployed in the Euclidean plane in a timeefficient way. We assume that all sensors could adjust their transmission range...
Weiping Shang, Peng-Jun Wan, Xiaodong Hu
QUESTA
2006
81views more  QUESTA 2006»
13 years 7 months ago
Fluid and diffusion limits for transient sojourn times of processor sharing queues with time varying rates
Abstract We provide an approximate analysis of the transient sojourn time for a processor sharing queue with time varying arrival and service rates, where the load can vary over ti...
Robert C. Hampshire, Mor Harchol-Balter, William A...
WADS
2007
Springer
165views Algorithms» more  WADS 2007»
14 years 1 months ago
A Near Linear Time Approximation Scheme for Steiner Tree Among Obstacles in the Plane
We present a polynomial-time approximation scheme (PTAS) for the Steiner tree problem with polygonal obstacles in the plane with running time O(n log2 n), where n denotes the numb...
Matthias Müller-Hannemann, Siamak Tazari
SODA
2008
ACM
138views Algorithms» more  SODA 2008»
13 years 8 months ago
Fully polynomial time approximation schemes for stochastic dynamic programs
We develop a framework for obtaining Fully Polynomial Time Approximation Schemes (FPTASs) for stochastic univariate dynamic programs with either convex or monotone single-period c...
Nir Halman, Diego Klabjan, Chung-Lun Li, James B. ...
FMSB
2008
130views Formal Methods» more  FMSB 2008»
13 years 9 months ago
Approximating Continuous Systems by Timed Automata
In this work we develop a new technique for over-approximating (in the sense of timed trace inclusion) continuous dynamical systems by timed auThis technique refines commonly-used ...
Oded Maler, Grégory Batt