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arXiv 0910.4045cond-mat.stat-mech
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时间漫游者和老龄化信息的空间动态

Time walkers and spatial dynamics of ageing information

Ludvig Lizana, Martin Rosvall, Kim Sneppen

摘要:

信息的分布对于生命系统的协调和适应能力至关重要。随机游走器经常被用来模拟这种分布过程,在这样做的时候,人们有效地假设信息随着时间的推移保持其相关性。但是,信息在社会和生物系统中的价值往往会衰减,必须不断更新。为了捕捉老化信息的空间动态,我们引入了时间步行者。一个时间行者像一个随机行者一样移动,但与其他行者留下的痕迹相互作用,一些代表旧的信息,一些新的。这些痕迹形成了一个可导航的信息景观。我们量化的动态特性的时间步行者移动的二维晶格和质量的信息景观所产生的运动。我们可视化的自相似景观作为一个河流网络,并表明,在这个景观搜索优于随机搜索和规模的循环删除随机行走的长度。

英文摘要:

The distribution of information is essential for living system's ability to coordinate and adapt. Random walkers are often used to model this distribution process and, in doing so, one effectively assumes that information maintains its relevance over time. But the value of information in social and biological systems often decay and must continuously be updated. To capture the spatial dynamics of ageing information, we introduce time walkers. A time walker moves like a random walker, but interacts with traces left by other walkers, some representing older information, some newer. The traces forms a navigable information landscape. We quantify the dynamical properties of time walkers moving on a two-dimensional lattice and the quality of the information landscape generated by their movements. We visualise the self-similar landscape as a river network, and show that searching in this landscape is superior to random searching and scales as the length of loop-erased random walks.

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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