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arXiv 1005.2818cond-mat.stat-mechphysics.soc-ph
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有向网络上的选民模型:双向意见交换的作用

Voter model on a directed network: Role of bidirectional opinion exchanges

Sung-Guk Han, Jaegon Um, Beom Jun Kim

摘要:

在有向网络上数值研究了具有节点更新规则的选举模型。我们从一个有向分层树开始,并以概率$p$分割和重新连接每个传入弧。为了区分好的和坏的意见,我们打破了$Z_2$对称性($σ= \pm 1$),给意见$σ= 1$更多的偏好。研究发现,随着$p$的增大,信息流通道的模式变得更加复杂,随着网络规模$N$的增大,系统最终会演化到这样一种状态,即尽管处于最高层的投票者保留了最差的意见,但仍有更多的投票者同意更好的意见.我们还发现,纯层次树的意见协议非常快,而最终的吸收状态可以很容易地影响选民在较高的排名。另一方面,尽管排序发生得慢得多,但双向信息流的复杂模式的存在允许系统同意更好的意见。

英文摘要:

The voter model with the node update rule is numerically investigated on a directed network. We start from a directed hierarchical tree, and split and rewire each incoming arc at the probability $p$. In order to discriminate the better and worse opinions, we break the $Z_2$ symmetry ($σ= \pm 1$) by giving a little more preference to the opinion $σ= 1$. It is found that as $p$ becomes larger, introducing more complicated pattern of information flow channels, and as the network size $N$ becomes larger, the system eventually evolves to the state in which more voters agree on the better opinion, even though the voter at the top of the hierarchy keeps the worse opinion. We also find that the pure hierarchical tree makes opinion agreement very fast, while the final absorbing state can easily be influenced by voters at the higher ranks. On the other hand, although the ordering occurs much slower, the existence of complicated pattern of bidirectional information flow allows the system to agree on the better opinion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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