نتایج جستجو برای: centrality

تعداد نتایج: 11074  

2005
Zhuli Xie

In this paper, we study different centrality measures being used in predicting noun phrases appearing in the abstracts of scientific articles. Our experimental results show that centrality measures improve the accuracy of the prediction in terms of both precision and recall. We also found that the method of constructing Noun Phrase Network significantly influences the accuracy when using the ce...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2006
Paolo Crucitti Vito Latora Sergio Porta

We study centrality in urban street patterns of different world cities represented as networks in geographical space. The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and characterization of the city structure. A hierarchical clustering analysis based on the distributions of centrality has a certain capacity to distinguish d...

2014
Shuhang Jiang Sean Fitzhugh Mark Warschauer

Literature indicates that centrality is correlated with learners’ engagement in MOOCs. This paper explores the relationship between centrality and performance in two MOOCs. We found one positive and one null correlation between centrality and grade scores at the end of the MOOCs. In both MOOCs, we found out that learners tend to communicate with learners in different performance groups. This su...

Journal: :Chaos 2013
Luis Sola Miguel Romance Regino Criado Julio Flores Alejandro García del Amo Stefano Boccaletti

We extend the concept of eigenvector centrality to multiplex networks, and introduce several alternative parameters that quantify the importance of nodes in a multi-layered networked system, including the definition of vectorial-type centralities. In addition, we rigorously show that, under reasonable conditions, such centrality measures exist and are unique. Computer experiments and simulation...

2006
A. MILOV

Main characteristics of the charged particle dNch/dη and transverse energy dET /dη production measured in Heavy Ion collisions at RHIC energies are presented in this article. Transformation of the pseudo-rapidity shape, relation to the incident energy and centrality profile are described in a systematic way. Centrality profile is shown to be closely bound to the number of nucleons participating...

Journal: :Complexity 2006
Dan Braha Yaneer Bar-Yam

We develop a new approach to the study of the dynamics of link utilization in complex networks using records of communication in a large social network. Counter to the perspective that nodes have particular roles, we find roles change dramatically from day to day. “Local hubs” have a power law degree distribution over time, with no characteristic degree value. Our results imply a significant re...

Journal: :EAI Endorsed Transactions on Industrial Networks and Intelligent Systems 2020

Journal: :ACS Central Science 2015

Journal: :Communications of the ACM 2018

Journal: :Innovation in Aging 2017

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