An evolving model of online bipartite networks
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Zhang, Chu-Xu
Institute of Information Economy, Hangzhou Normal University, China - Web Sciences Center, University of Electronic Science and Technology of China, Chengdu, China
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Zhang, Zi-Ke
Institute of Information Economy, Hangzhou Normal University, China - Web Sciences Center, University of Electronic Science and Technology of China, Chengdu, China - Department of Physics, University of Fribourg, Switzerland
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Liu, Chuang
Institute of Information Economy, Hangzhou Normal University, China
Published in:
- Physica A: Statistical Mechanics and its Applications. - 2013, vol. 392, no. 23, p. 6100–6106
English
Understanding the structure and evolution of online bipartite networks is a significant task since they play a crucial role in various e-commerce services nowadays. Recently, various attempts have been tried to propose different models, resulting in either power-law or exponential degree distributions. However, many empirical results show that the user degree distribution actually follows a shifted power-law distribution, the so-called Mandelbrot’s law , which cannot be fully described by previous models. In this paper, we propose an evolving model, considering two different user behaviors: random and preferential attachment. Extensive empirical results on two real bipartite networks, Delicious and CiteULike , show that the theoretical model can well characterize the structure of real networks for both user and object degree distributions. In addition, we introduce a structural parameter pp, to demonstrate that the hybrid user behavior leads to the shifted power-law degree distribution, and the region of power-law tail will increase with the increment of pp. The proposed model might shed some lights in understanding the underlying laws governing the structure of real online bipartite networks.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/303474
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