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arXiv 1303.5673cs.SIphysics.soc-ph
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复杂网络社团结构检测的包围学习遗传算法

Genetic Algorithm with Ensemble Learning for Detecting Community Structure in Complex Networks

Dongxiao He, Zhe Wang, Bin Yang, Chunguang Zhou

摘要:

复杂网络中的社区发现是近年来科学界研究的热点。针对遗传算法在复杂网络社团社区发现中应用不多的问题,提出了一种基于集成学习的遗传算法(GAEL)来检测复杂网络社团结构。GAEL用基于集成学习的多个体交叉算子代替传统的交叉算子。因此,GAEL可以避免传统交叉算子只能混合不同个体的字符串块,而不能将不同个体的聚类上下文重组成新的更好的聚类上下文的问题。此外,在变异算子中采用了局部搜索策略,使变异节点被放置到其邻居最多的社区中。最后,本文采用了一种基于马尔可夫随机游走的方法来初始化种群,从而为我们提供了一个精确多样的聚类解种群。这些个体的多样性和准确性适合于基于集成学习的多个体交叉算子。在计算机生成的网络和真实世界的网络上进行测试,并与当前复杂网络中的社区发现的代表性算法进行比较。实验结果表明,GAEL是非常有效的发现社区结构。

英文摘要:

Community detection in complex networks is a topic of considerable recent interest within the scientific community. For dealing with the problem that genetic algorithm are hardly applied to community detection, we propose a genetic algorithm with ensemble learning (GAEL) for detecting community structure in complex networks. GAEL replaces its traditional crossover operator with a multi-individual crossover operator based on ensemble learning. Therefore, GAEL can avoid the problems that are brought by traditional crossover operator which is only able to mix string blocks of different individuals, but not able to recombine clustering contexts of different individuals into new better ones. In addition, the local search strategy, which makes mutated node be placed into the community where most of its neighbors are, is used in mutation operator. At last, a Markov random walk based method is used to initialize population in this paper, and it can provide us a population of accurate and diverse clustering solutions. Those diverse and accurate individuals are suitable for ensemble learning based multi-individual crossover operator. The proposed GAEL is tested on both computer-generated and real-world networks, and compared with current representative algorithms for community detection in complex networks. Experimental results demonstrate that GAEL is highly effective at discovering community structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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