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arXiv 1802.01729cs.SIphysics.soc-ph
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基于异质扩散模型的在线社交网络多重影响力最大化

Multiplex Influence Maximization in Online Social Networks with Heterogeneous Diffusion Models

Alan Kuhnle, Md Abdul Alim, Xiang Li, Huiling Zhang, My T. Thai

摘要:

在线社交网络,通过重叠的用户连接在一起的动机,我们研究的影响力最大化问题的多元化,每一层赋予自己的影响力扩散模型。这个问题是一个新版本的影响力最大化问题,需要新的分析,将在每一层的多路复用的传播类型。我们确定了一个新的属性,广义确定性的子模块,当满足在每一层的传播,确保传播的复用整体是子模块-在这种情况下,我们制定ISF,贪婪算法与近似比$(1 - 1/e)$。由于包括多个OSN的复用的大小可能包含数十亿用户,我们制定了一个算法KSN,并行运行在复用的每一层上。KSN将用于单层网络上的影响力最大化问题的$α$近似算法A作为输入,并且对于任意$ε> 0$具有近似比$\frac{(1-ε)α}{(o+1)k}$,$o$是重叠用户的数量,并且$k$是复用中的层的数量。在真实和合成多路复用上的实验验证了所提出的算法对异构多路复用中的影响力最大化问题的有效性。ISF和KSN的实现可在http://www.alankuhnle.com/papers/mim/mim.html上获得。

英文摘要:

Motivated by online social networks that are linked together through overlapping users, we study the influence maximization problem on a multiplex, with each layer endowed with its own model of influence diffusion. This problem is a novel version of the influence maximization problem that necessitates new analysis incorporating the type of propagation on each layer of the multiplex. We identify a new property, generalized deterministic submodular, which when satisfied by the propagation in each layer, ensures that the propagation on the multiplex overall is submodular -- for this case, we formulate ISF, the greedy algorithm with approximation ratio $(1 - 1/e)$. Since the size of a multiplex comprising multiple OSNs may encompass billions of users, we formulate an algorithm KSN that runs on each layer of the multiplex in parallel. KSN takes an $α$-approximation algorithm A for the influence maximization problem on a single-layer network as input, and has approximation ratio $\frac{(1-ε)α}{(o+1)k}$ for arbitrary $ε> 0$, $o$ is the number of overlapping users, and $k$ is the number of layers in the multiplex. Experiments on real and synthesized multiplexes validate the efficacy of the proposed algorithms for the problem of influence maximization in the heterogeneous multiplex. Implementations of ISF and KSN are available at http://www.alankuhnle.com/papers/mim/mim.html.

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