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arXiv 1909.01288math.DScs.SYeess.SYphysics.data-anq-bio.PE
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线性能控性与非线性动态网络的无关性

Irrelevance of linear controllability to nonlinear dynamical networks

Junjie Jiang, Ying-Cheng Lai

摘要:

复杂网络的线性能控性研究取得了巨大的发展。现实世界的系统从根本上说是非线性的。线性能控性与非线性动态网络相关吗?我们发现这两种控制方式都有一个共同的特点:节点的重要性。对于非线性和线性控制,重要性分别由物理/生物考虑因素和节点在最小驱动器集中的概率确定。我们研究经验互惠网络和基因调控网络,其中的非线性节点的重要性可以量化的能力,个别节点恢复系统从一个临界点过渡的后果。我们发现,节点的重要性排名的非线性和线性控制表现出相反的趋势:对于前者的大的度的节点是更重要的,但对于后者,重要性的规模是向小度的节点倾斜,这表明这些系统的线性可控性强烈无关。最近声称成功地应用线性能控性C。elegans连接组进行了研究和讨论。

英文摘要:

There has been tremendous development of linear controllability of complex networks. Real-world systems are fundamentally nonlinear. Is linear controllability relevant to nonlinear dynamical networks? We identify a common trait underlying both types of control: the nodal "importance." For nonlinear and linear control, the importance is determined, respectively, by physical/biological considerations and the probability for a node to be in the minimum driver set. We study empirical mutualistic networks and a gene regulatory network, for which the nonlinear nodal importance can be quantified by the ability of individual nodes to restore the system from the aftermath of a tipping-point transition. We find that the nodal importance ranking for nonlinear and linear control exhibits opposite trends: for the former large-degree nodes are more important but for the latter, the importance scale is tilted towards the small-degree nodes, suggesting strongly irrelevance of linear controllability to these systems. The recent claim of successful application of linear controllability to C. elegans connectome is examined and discussed.

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