针对现有复杂网络节点重要性排序方法无法处理目标体系网络节点异质连边有向有权的难题,提出一种面向目标体系网络的节点重要性排序方法。利用K-shell算法计算网络节点的初始重要值,并在PageRank算法的节点重要性传递中考虑重要性分配...针对现有复杂网络节点重要性排序方法无法处理目标体系网络节点异质连边有向有权的难题,提出一种面向目标体系网络的节点重要性排序方法。利用K-shell算法计算网络节点的初始重要值,并在PageRank算法的节点重要性传递中考虑重要性分配趋强的特点和连边权重,提出K-shell和PageRank扩展(Extended K-shell and PageRank,EKSPR)算法,并给出EKSPR算法的收敛性证明,进行了作战仿真实验验证和算例对比分析。实验结果表明,EKSPR算法相对于K-shell算法和PageRank算法更适用于处理目标体系网络节点重要性排序,并且效率优于均值EKSPR算法。展开更多
复杂网络中,评估节点的重要性对于研究网络结构和传播过程有着重要意义.通过节点的位置,K-shell分解算法能够很好地识别关键节点,但是这种算法导致很多节点具有相同的K-shell(Ks)值.同时,现有的算法大都只考虑局部指标或者全局指标,导...复杂网络中,评估节点的重要性对于研究网络结构和传播过程有着重要意义.通过节点的位置,K-shell分解算法能够很好地识别关键节点,但是这种算法导致很多节点具有相同的K-shell(Ks)值.同时,现有的算法大都只考虑局部指标或者全局指标,导致评判节点重要性的因素单一.为了更好地识别关键节点,提出了EKSDN(Extended K-shell and Degree of Neighbors)算法,该算法综合考虑了节点的全局指标加权核值以及节点的局部指标度数.与SIR(Susceptible-Infectious-Recovered)模型在真实复杂网络中模拟结果相比,EKSDN算法能够更好地识别关键节点.展开更多
说话者-侦听器标签传播算法(Speaker-Listener Label Propagation Algorithm,SLPA)以标签传播算法为基础,通过Speaker和Listener互动的动态过程来发现网络中的重叠社团,时间复杂度近似线性,但在标签传播过程中存在随机性,并且在应用到...说话者-侦听器标签传播算法(Speaker-Listener Label Propagation Algorithm,SLPA)以标签传播算法为基础,通过Speaker和Listener互动的动态过程来发现网络中的重叠社团,时间复杂度近似线性,但在标签传播过程中存在随机性,并且在应用到大规模网络时节点标签初始化需耗费大量的资源。针对以上问题,通过改进SLPA设计了一种基于标签传播的重叠社团发现算法(Overlapping Community Division Algorithm Based on Label Propagation,LP-OCD)。该算法在每个节点存储器初始化标签之前,利用K-Shell分解算法对网络进行预处理,去除边缘层节点;在标签更新阶段,通过改进Speaking和Listening策略来降低算法的随机性;后处理阶段边缘层节点的标签由其邻居节点信息决定。实验结果表明,LP-OCD算法不仅具有近似线性的时间复杂度,而且显著提高了所发现重叠社团的质量。展开更多
To ensure flight safety,the complex network method is used to study the influence and invulnerability of air traffic cyber physical system(CPS)nodes.According to the rules of air traffic management,the logical couplin...To ensure flight safety,the complex network method is used to study the influence and invulnerability of air traffic cyber physical system(CPS)nodes.According to the rules of air traffic management,the logical coupling relationship between routes and sectors is analyzed,an air traffic CPS network model is constructed,and the indicators of node influence and invulnerability are established.The K-shell algorithm is improved to identify node influence,and the invulnerability is analyzed under random and selective attacks.Taking Airspace in Eastern China as an example,its influential nodes are sorted by degree,namely,K-shell,the improved K-shell(IKS)and betweenness centrality.The invulnerability of air traffic CPS under different attacks is analyzed.Results show that IKS can effectively identify the influential nodes in the air traffic CPS network,and IKS and betweenness centrality are the two key indicators that affect the invulnerability of air traffic CPS.展开更多
文摘针对现有复杂网络节点重要性排序方法无法处理目标体系网络节点异质连边有向有权的难题,提出一种面向目标体系网络的节点重要性排序方法。利用K-shell算法计算网络节点的初始重要值,并在PageRank算法的节点重要性传递中考虑重要性分配趋强的特点和连边权重,提出K-shell和PageRank扩展(Extended K-shell and PageRank,EKSPR)算法,并给出EKSPR算法的收敛性证明,进行了作战仿真实验验证和算例对比分析。实验结果表明,EKSPR算法相对于K-shell算法和PageRank算法更适用于处理目标体系网络节点重要性排序,并且效率优于均值EKSPR算法。
文摘复杂网络中,评估节点的重要性对于研究网络结构和传播过程有着重要意义.通过节点的位置,K-shell分解算法能够很好地识别关键节点,但是这种算法导致很多节点具有相同的K-shell(Ks)值.同时,现有的算法大都只考虑局部指标或者全局指标,导致评判节点重要性的因素单一.为了更好地识别关键节点,提出了EKSDN(Extended K-shell and Degree of Neighbors)算法,该算法综合考虑了节点的全局指标加权核值以及节点的局部指标度数.与SIR(Susceptible-Infectious-Recovered)模型在真实复杂网络中模拟结果相比,EKSDN算法能够更好地识别关键节点.
文摘说话者-侦听器标签传播算法(Speaker-Listener Label Propagation Algorithm,SLPA)以标签传播算法为基础,通过Speaker和Listener互动的动态过程来发现网络中的重叠社团,时间复杂度近似线性,但在标签传播过程中存在随机性,并且在应用到大规模网络时节点标签初始化需耗费大量的资源。针对以上问题,通过改进SLPA设计了一种基于标签传播的重叠社团发现算法(Overlapping Community Division Algorithm Based on Label Propagation,LP-OCD)。该算法在每个节点存储器初始化标签之前,利用K-Shell分解算法对网络进行预处理,去除边缘层节点;在标签更新阶段,通过改进Speaking和Listening策略来降低算法的随机性;后处理阶段边缘层节点的标签由其邻居节点信息决定。实验结果表明,LP-OCD算法不仅具有近似线性的时间复杂度,而且显著提高了所发现重叠社团的质量。
基金This work was supported by the Fundamental Research Funds for the Central Universities(No.3122019191).
文摘To ensure flight safety,the complex network method is used to study the influence and invulnerability of air traffic cyber physical system(CPS)nodes.According to the rules of air traffic management,the logical coupling relationship between routes and sectors is analyzed,an air traffic CPS network model is constructed,and the indicators of node influence and invulnerability are established.The K-shell algorithm is improved to identify node influence,and the invulnerability is analyzed under random and selective attacks.Taking Airspace in Eastern China as an example,its influential nodes are sorted by degree,namely,K-shell,the improved K-shell(IKS)and betweenness centrality.The invulnerability of air traffic CPS under different attacks is analyzed.Results show that IKS can effectively identify the influential nodes in the air traffic CPS network,and IKS and betweenness centrality are the two key indicators that affect the invulnerability of air traffic CPS.