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Exact calculations of first-passage properties on the pseudofractal scale-free web

机译:准分形无标度网上的第一遍特性的精确计算

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In this paper, we consider discrete time random walks on the pseudofractal scale-free web (PSFW) and we study analytically the related first passage properties. First, we classify the nodes of the PSFW into different levels and propose a method to derive the generation function of the first passage probability from an arbitrary starting node to the absorbing domain, which is located at one or more nodes of low-level (i.e., nodes with large degree). Then, we calculate exactly the first passage probability, the survival probability, the mean, and the variance of first passage time by using the generating functions as a tool. Finally, for some illustrative examples corresponding to given choices of starting node and absorbing domain, we derive exact and explicit results for such first passage properties. The method we propose can as well address the cases where the absorbing domain is located at one or more nodes of high-level on the PSFW, and it can also be used to calculate the first passage properties on other networks with self-similar structure, such as (u, v) flowers and recursive scale-free trees. (C) 2015 AIP Publishing LLC.
机译:在本文中,我们考虑了伪分形无标度网(PSFW)上的离散时间随机游动,并分析了相关的初次通过特性。首先,我们将PSFW的节点分为不同级别,并提出一种方法来推导从任意起始节点到吸收域的第一次通过概率的生成函数,该吸收域位于一个或多个低层节点(即,度数较大的节点)。然后,我们使用生成函数作为工具,精确计算首次通过概率,生存概率,平均值和第一次通过时间的方差。最后,对于与起始节点和吸收域的给定选择相对应的一些说明性示例,我们得出了此类首次通过特性的准确而明确的结果。我们提出的方法还可以解决吸收域位于PSFW上一个或多个高层节点的情况,也可以用于计算具有自相似结构的其他网络上的首次通过特性,例如(u,v)花和递归无标度树。 (C)2015 AIP Publishing LLC。

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