Volume 84, Number 5, December 2008
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||16 December 2008|
Pinning controllability of asymmetrical weighted scale-free networks
College of Physics and Electronic Engineering, Guangxi Normal University - Guilin 541004, China
2 Department of Electronic Engineering, City University of Hong Kong - Hong Kong SAR, China
Corresponding author: email@example.com
Accepted: 29 October 2008
This letter studies the pinning controllability of asymmetrical weighted scale-free networks, in which every individual node is a chaotic Lorenz system. The selective pinning scheme, which gives the control priority to those nodes with largest numbers of connections, is adopted. Study shows that a dynamical network of this type can be controlled via selective pinning only when the proportion p of the controlled nodes exceeds a critical value pc; and the network pinning controllability is enhanced as p increases for . This study also reveals the effects of the weights and the topologies of this type of networks on their pinning controllability, showing that pinning controllability of a network can be improved with an asymmetrical weight distribution, where the couplings from older nodes to younger ones are dominant, with a larger average connectivity or with a more heterogeneous connection distribution.
PACS: 89.75.Hc – Networks and genealogical trees / 05.45.Gg – Control of chaos, applications of chaos / 05.45.Xt – Synchronization; coupled oscillators
© EPLA, 2008
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