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arXiv 1401.0655cs.SIphysics.soc-ph
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有向网络中的关键节点

Critical Nodes In Directed Networks

Owen Sims, Robert P. Gilles

摘要:

在考虑信息流动和贸易时,关键节点或“中间人”在社会和经济网络中都占有重要地位。本文将关键节点的概念推广到有向网络。我们识别强有力的中间商和弱有力的中间商。节点稳定性被引入作为网络竞争的一种形式;建立了无竞争的中介和中间人之间的二元性。对中间商的代理权进行了形式化的表达,并构造了一个从网络邻接矩阵中度量各节点代理权的通用算法。经纪人权力措施的增强进行了讨论,封装相关的中心性措施。我们使用这些概念来识别和测量两个经验的社会经济网络,文艺复兴时期的佛罗伦萨和Krackhardt的建议网络的精英婚姻网络的中间人。

英文摘要:

Critical nodes or "middlemen" have an essential place in both social and economic networks when considering the flow of information and trade. This paper extends the concept of critical nodes to directed networks. We identify strong and weak middlemen. Node contestability is introduced as a form of competition in networks; a duality between uncontested intermediaries and middlemen is established. The brokerage power of middlemen is formally expressed and a general algorithm is constructed to measure the brokerage power of each node from the networks adjacency matrix. Augmentations of the brokerage power measure are discussed to encapsulate relevant centrality measures. We use these concepts to identify and measure middlemen in two empirical socio-economic networks, the elite marriage network of Renaissance Florence and Krackhardt's advice network.

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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