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» On the Complexity of Exclusion Algorithms for Optimization
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DEXA
2003
Springer
108views Database» more  DEXA 2003»
15 years 6 months ago
Exploiting Similarity of Subqueries for Complex Query Optimization
Query optimizers in current database management systems (DBMS) often face problems such as intolerably long optimization time and/or poor optimization results when optimizing compl...
Yingying Tao, Qiang Zhu, Calisto Zuzarte
CP
2001
Springer
15 years 5 months ago
Evaluation of Search Heuristics for Embedded System Scheduling Problems
Abstract. In this paper we consider the problem of optimal task allocation and scheduling in embedded real-time systems. This problem is far from trivial due to the wide range of c...
Cecilia Ekelin, Jan Jonsson
AUTOMATICA
2008
75views more  AUTOMATICA 2008»
15 years 1 months ago
Optimal complexity reduction of polyhedral piecewise affine systems
This paper focuses on the NP-hard problem of reducing the complexity of piecewise polyhedral systems (e.g. polyhedral piecewise affine (PWA) systems). The results are fourfold. Fi...
Tobias Geyer, Fabio Danilo Torrisi, Manfred Morari
COCO
1995
Springer
134views Algorithms» more  COCO 1995»
15 years 4 months ago
Towards Average-Case Complexity Analysis of NP Optimization Problems
For the worst-case complexity measure, if P = NP, then P = OptP, i.e., all NP optimization problems are polynomial-time solvable. On the other hand, it is not clear whether a simi...
Rainer Schuler, Osamu Watanabe
GLOBECOM
2007
IEEE
15 years 3 months ago
Optimal Downlink OFDMA Subcarrier, Rate, and Power Allocation with Linear Complexity to Maximize Ergodic Weighted-Sum Rates
Abstract— In this paper, we propose a resource allocation algorithm for ergodic weighted-sum rate maximization in downlink OFDMA systems. In contrast to most previous research tha...
Ian C. Wong, Brian L. Evans