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arXiv 2209.04562cs.SIcond-mat.stat-mechcs.DScs.LGmath.OC
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Bayan算法:通过模块度的精确与近似优化检测网络中的社区

Bayan Algorithm: Detecting Communities in Networks Through Exact and Approximate Optimization of Modularity

University of Toronto(多伦多大学);Polytechnique Montréal(蒙特利尔理工学院)

Samin Aref, Mahdi Mostajabdaveh, Hriday Chheda

AI总结:

本文提出Bayan算法,通过带最优性与近似保证的模块度全局优化检测社区,并在30种方法对比中证明其在小型网络上更准确、稳定且可靠。

摘要:

社区检测是一个经典的网络问题,在多个领域具有广泛应用。其最常见的方法是使用模块度最大化启发式算法,而这些算法很少返回最优划分或任何与之相近的结果。具有全局最优模块度的划分难以计算,因此尚未得到充分研究。利用结构多样的网络,我们比较了30种社区检测方法,其中包括我们提出的、能够提供最优性和近似保证的算法:Bayan算法。与现有方法不同,Bayan对模块度进行全局最大化,或在一个因子内对其进行近似。我们的结果表明,最大模块度划分在恢复植入划分方面具有显著的准确性和稳定性,在两个标准基准测试的广泛参数设置下,其恢复率高于大多数替代方法。与来自其他29种算法的划分相比,最大模块度划分在描述长度、覆盖率、性能、平均电导和良好聚类性方面具有最佳中位数。这些优势的代价是额外的计算,而Bayan使小型网络(最大连通分量中至多有3000条边的网络)上的此类计算成为可能。Bayan比使用开源和商业求解器进行模块度最大化快数倍,因此能够为其他任何现有方法都无法优化的实例找到最优划分。我们的结果指出了若干表现良好的算法,其中Bayan作为小型网络最可靠的方法脱颖而出。Bayan算法的Python实现(bayanpy)可通过Python包安装程序公开获取。

英文摘要:

Community detection is a classic network problem with extensive applications in various fields. Its most common method is using modularity maximization heuristics which rarely return an optimal partition or anything similar. Partitions with globally optimal modularity are difficult to compute, and therefore have been underexplored. Using structurally diverse networks, we compare 30 community detection methods including our proposed algorithm that offers optimality and approximation guarantees: the Bayan algorithm. Unlike existing methods, Bayan globally maximizes modularity or approximates it within a factor. Our results show the distinctive accuracy and stability of maximum-modularity partitions in retrieving planted partitions at rates higher than most alternatives for a wide range of parameter settings in two standard benchmarks. Compared to the partitions from 29 other algorithms, maximum-modularity partitions have the best medians for description length, coverage, performance, average conductance, and well clusteredness. These advantages come at the cost of additional computations which Bayan makes possible for small networks (networks that have up to 3000 edges in their largest connected component). Bayan is several times faster than using open-source and commercial solvers for modularity maximization, making it capable of finding optimal partitions for instances that cannot be optimized by any other existing method. Our results point to a few well performing algorithms, among which Bayan stands out as the most reliable method for small networks. A Python implementation of the Bayan algorithm (bayanpy) is publicly available through the package installer for Python.

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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