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Resilience of and recovery strategies for weighted networks

机译:加权网络的弹性和恢复策略

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摘要

The robustness and resilience of complex networks have been widely studied and discussed in both research and industry because today, the diversity of system components and the complexity of the connection between units are increasingly influencing the reliability of complex systems. Previous studies have focused on node failure in networks, proposing several performance indicators. However, a single performance indicator cannot comprehensively measure all the performance aspects; thus, the selected performance indicators and recovery strategies lack consistency with respect to the targeted complex systems. This paper introduces a novel stress–strength-balanced weighted network model based on two network transmission hypotheses. Then, with respect to different concerns of the complex network, we propose two modified network performance measurement indicators and compare these indicators in terms of their trends in the attack process. In addition, we introduce several network recovery strategies and compare their efficiencies. Our findings are as follows: (1) The evaluation and judgment of the network performance depend on the performance measurement indicators we use. (2) Different recovery strategies exhibit distinct efficiencies in recovering different aspects of network performance, and no strategy exists that can improve all the network performance aspects simultaneously. (3) The timing of the recovery is proved to have a deep influence on the cost and efficiency of network recovery; thus, the optimal recovery strategy for a damaged network varies with the extent of the damage. From the results of the simulation of the attack-recovery process, we conclude that while defining and analyzing complex network models, we should adjust our network topology, weight assignment, and performance indicators in accordance with the focal characteristics of complex systems so that we can use the network model to build robust complex systems and efficient logistics and maintenance strategies.
机译:复杂网络的健壮性和灵活性已在研究和行业中进行了广泛的研究和讨论,因为今天,系统组件的多样性和单元之间连接的复杂性越来越影响复杂系统的可靠性。先前的研究集中于网络中的节点故障,提出了一些性能指标。但是,单一的绩效指标不能全面衡量所有绩效方面。因此,所选的性能指标和恢复策略相​​对于目标复杂系统缺乏一致性。本文基于两个网络传输假设,介绍了一种新颖的应力-强度-平衡加权网络模型。然后,针对复杂网络的不同方面,我们提出了两个改进的网络性能度量指标,并根据它们在攻击过程中的趋势进行了比较。此外,我们介绍了几种网络恢复策略并比较了它们的效率。我们的发现如下:(1)网络性能的评估和判断取决于我们使用的性能度量指标。 (2)不同的恢复策略在恢复网络性能的不同方面表现出不同的效率,并且不存在可以同时改善所有网络性能方面的策略。 (3)事实证明恢复时间对网络恢复的成本和效率有深远的影响;因此,受损网络的最佳恢复策略会随受损程度而变化。从攻击恢复过程的仿真结果可以得出结论,在定义和分析复杂网络模型时,我们应根据复杂系统的重点特征调整网络拓扑,权重分配和性能指标,以便我们能够使用网络模型来构建健壮的复杂系统以及有效的物流和维护策略。

著录项

  • 期刊名称 PLoS Clinical Trials
  • 作者

    Xing Pan; Huixiong Wang;

  • 作者单位
  • 年(卷),期 2012(13),9
  • 年度 2012
  • 页码 e0203894
  • 总页数 15
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

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