In: The European Physical Journal B, 2013, vol. 86, no. 2, p. 1-8
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In: The European Physical Journal B, 2013, vol. 86, no. 2, p. 1-8
People in the Internet era have to cope with the information overload, striving to find what they are interested in, and usually face this situation by following a limited number of sources or friends that best match their interests. A recent line of research, namely adaptive social recommendation, has therefore emerged to optimize the information propagation in social networks and provide...
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In: Physica A: Statistical Mechanics and its Applications, 2012, vol. 391, no. 4, p. 1822–1830
Understanding the structure and evolution of web-based user-item bipartite networks is an important task since they play a fundamental role in online information filtering. In this paper, we focus on investigating the patterns of online users’ behavior and the effect on recommendation process. Empirical analysis on the e-commercial systems show that users’ taste preferences are heterogeneous...
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In: Physical Review E - statistical, non linear and soft matter physics, 2011, vol. 83, no. 5, p. 056123
Coarse-graining model is a promising way to analyze and visualize large-scale networks. The coarse-grained networks are required to preserve statistical properties as well as the dynamic behaviors of the initial networks. Some methods have been proposed and found effective in undirected networks, while the study on coarse-graining directed networks lacks of consideration. In this paper we...
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In: EPL - Europhysics Letters, 2012, vol. 98, no. 2, p. 28003
Recently, Li et al. (Phys. Rev. Lett., 104 (2010) 018701) studied a spatial network which is constructed from a regular lattice by adding long-range edges (shortcuts) with probability Pij~rij−α, where rij is the Manhattan length of the long-range edges. The total length of the additional...
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In: Journal of Informetrics, 2019, vol. 13, no. 2, p. 717–725
Identifying the future influential papers among the newly published ones is an important yet challenging issue in bibliometrics. As newly published papers have no or limited citation history, linear extrapolation of their citation counts—which is motivated by the well-known preferential attachment mechanism—is not applicable. We translate the recently introduced notion of discoverers to...
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In: Physica A: Statistical Mechanics and its Applications, 2011, vol. 390, no. 21-22, p. 3962-3969
Recently, spatial networks have attracted much attention. The spatial network is constructed from a regular lattice by adding long-range edges (shortcuts) with probability P(r)∼r−δ, where r is the geographical distance between the two ends of the edge. Also, a cost constraint on the total length of the additional edges is introduced...
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In: Physics Letters A, 2015, vol. 379, no. 43–44, p. 2839–2844
The rapid expansion of the Internet requires effective information filtering techniques to extract the most essential and relevant information for online users. Many recommendation algorithms have been proposed to predict the future items that a given user might be interested in. However, there is an important issue that has always been ignored so far in related works, namely the heterogeneous...
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In: Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 2012, vol. 85, no. 6, p. 066130
In a recent work [ Schneider et al. Proc. Natl. Acad. Sci. USA 108 3838 (2011)], the authors proposed a simple measure for network robustness under malicious attacks on nodes. Using a greedy algorithm, they found that the optimal structure with respect to this quantity is an onion structure in which high-degree nodes form a core surrounded by rings of nodes with decreasing degree. However, in...
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In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2011, vol. 83, no. 4, p. 045101
We propose a method called the residual edge-betweenness gradient (REBG) to enhance the synchronizability of networks by assigning the link direction while keeping the topology and link weights unchanged. Direction assignment has been shown to improve the synchronizability of undirected networks in general, but we find that in some cases incommunicable components emerge and networks fail to...
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