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INFOCOM
2012
IEEE
13 years 8 days ago
On the construction of data aggregation tree with minimum energy cost in wireless sensor networks: NP-completeness and approxima
—In many applications, it is a basic operation for the sink to periodically collect reports from all sensors. Since the data gathering process usually proceeds for many rounds, i...
Tung-Wei Kuo, Ming-Jer Tsai
FCT
2003
Springer
15 years 3 months ago
Complexity of Approximating Closest Substring Problems
The closest substring problem, where a short string is sought that minimizes the number of mismatches between it and each of a given set of strings, is a minimization problem with ...
Patricia A. Evans, Andrew D. Smith
JOIN
2007
133views more  JOIN 2007»
14 years 9 months ago
The Coverage Problem in Three-Dimensional Wireless Sensor Networks
— One of the fundamental issues in sensor networks is the coverage problem, which reflects how well a sensor network is monitored or tracked by sensors. In this paper, we formul...
Chi-Fu Huang, Yu-Chee Tseng, Li-Chu Lo
GLOBECOM
2008
IEEE
15 years 4 months ago
Comparison of Routing and Wavelength Assignment Algorithms in WDM Networks
- We design and implement various algorithms for solving the static RWA problem with the objective of minimizing the maximum number of requested wavelengths based on LP relaxation ...
Kostas Christodoulopoulos, Konstantinos Manousakis...
ACSD
2009
IEEE
110views Hardware» more  ACSD 2009»
15 years 2 months ago
Variants of the Language Based Synthesis Problem for Petri Nets
The application of synthesis of Petri nets from languages for practical problems has recently attracted increasing attention. However, the classical synthesis problems are often n...
Sebastian Mauser, Robert Lorenz