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On subspaces of pseudo-radial spaces

Jin Yuan Zhou — 1993

Commentationes Mathematicae Universitatis Carolinae

It is proved that, under the Martin’s Axiom, every T 1 -space with countable tightness is a subspace of some pseudo-radial space. We also give several characterizations of subspaces of pseudo-radial spaces and conclude that being a subspace of a pseudo-radial space is a local property.

Impulsive practical synchronization of n-dimensional nonautonomous systems with parameter mismatch

Mihua MaHua ZhangJianping CaiJin Zhou — 2013

Kybernetika

This paper is concerned with impulsive practical synchronization in a class of n-dimensional nonautonomous dynamical systems with parameter mismatch. Some simple yet general algebraic synchronization criteria are derived based on the developed practical stability theory on impulsive dynamical systems. A distinctive feature of this work is that the impulsive control strategy is used to make n-dimensional nonautonomous dynamical systems with parameter mismatch achieve practical synchronization, where...

Group synchronization of diffusively coupled harmonic oscillators

Liyun ZhaoJun LiuLan XiangJin Zhou — 2016

Kybernetika

This paper considers group synchronization issue of diffusively directed coupled harmonic oscillators for two cases with nonidentical and identical agent dynamics. For the case of coupled nonidentical harmonic oscillators with positive coupling, it is demonstrated that distributed group synchronization can always be achieved under two kinds of network structures, i. e., the strongly connected graph and the acyclic partition topology with a directed spanning tree. It is interesting to find that the...

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