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题名:
local search with edge weighting and configuration checking heuristics for minimum vertex cover
作者: Cai Shaowei ; Su Kaile ; Sattar Abdul
会议文集: Artificial Intelligence
出版日期: 2011
关键词: Combinatorial optimization ; Learning algorithms ; Problem solving
收录类别: ei
ISSN: 43702
部门归属: (1) Key laboratory of High Confidence Software Technologies (Peking University), Ministry of Education, Beijing, China; (2) Institute for Integrated and Intelligent Systems, Griffith University, Brisbane, Australia; (3) State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing, China; (4) ATOMIC Project, Queensland Research Lab, NICTA, Australia
英文摘要: The Minimum Vertex Cover (MVC) problem is a well-known combinatorial optimization problem of great importance in theory and applications. In recent years, local search has been shown to be an effective and promising approach to solve hard problems, such as MVC. In this paper, we introduce two new local search algorithms for MVC, called EWLS (Edge Weighting Local Search) and EWCC (Edge Weighting Configuration Checking). The first algorithm EWLS is an iterated local search algorithm that works with a partial vertex cover, and utilizes an edge weighting scheme which updates edge weights when getting stuck in local optima. Nevertheless, EWLS has an instance-dependent parameter. Further, we propose a strategy called Configuration Checking for handling the cycling problem in local search. This is used in designing a more efficient algorithm that has no instance-dependent parameters, which is referred to as EWCC. Unlike previous vertex-based heuristics, the configuration checking strategy considers the induced subgraph configurations when selecting a vertex to add into the current candidate solution.A detailed experimental study is carried out using the well-known DIMACS and BHOSLIB benchmarks. The experimental results conclude that EWLS and EWCC are largely competitive on DIMACS benchmarks, where they outperform other current best heuristic algorithms on most hard instances, and dominate on the hard random BHOSLIB benchmarks. Moreover, EWCC makes a significant improvement over EWLS, while both EWLS and EWCC set a new record on a twenty-year challenge instance. Further, EWCC performs quite well even on structured instances in comparison to the best exact algorithm we know. We also study the run-time behavior of EWLS and EWCC which shows interesting properties of both algorithms. © 2011 Elsevier B.V.
语种: 英语
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内容类型: 会议论文
URI标识: http://ir.iscas.ac.cn/handle/311060/14267
Appears in Collections:计算机科学国家重点实验室 _会议论文

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