这是一篇PRE 80, 030624(2009)的文章,作者为Liang Huang等。 摘要:Master-stability functions (MSFs) are fundamental to the study of synchronization in complex dynamical systems. For example, for a coupled oscillator network, a necessary condition for synchronization to occur is that the MSF at the corresponding normalized coupling parameters be negative. To understand the typical behaviors of the MSF for various chaotic oscillators is key to predicting the collective dynamics of a network of these oscillators. We address this issue by examining, systematically, MSFs for known chaotic oscillators. Our computations and analysis indicate that it is generic for MSFs being negative in a finite interval of a normalized coupling parameter. A general scheme is proposed to classify the typical behaviors of MSFs into four categories. These results are verified by direct simulations of synchronous dynamics on networks of actual coupled oscillators.
1. The MSF can be obtained independent of the topoloty of the underlying network that supports a large number of such oscillators.这是否意味着,我们没办法用MSF方法来讨论具体一个网络中,某些特定的点对稳定同步的作用呢?如度数最大的点,n个点构成的团簇等子网络等。
2.A necessary condition ofr synchronization to occur is that the MSF be negative and the corresponding normalized coupling parameters fall in the negative region of the MSf. 这将意味着存在某类动力系统,其特定拓扑结构的网络,用MSF分析可以完全同步,但实际上却不可能同步。这篇文章说的都是成功的例子,可曾有实例反倒?
4. For nonlinear oscillators, the Jacobian matrix DF typically depends on the trajectory S(t). 这里没有指出同步解S(t)是唯的,所以当非线性振子是多稳振子时,MSF应用时会是怎么样的呢?这可不可以作为问题2的一个回答?因为可能对一个稳态是可同步的,另一个稳态是不可同步的。如果两个态都是稳定同步态,系统最终选择哪个稳定性也要取决于初始条件。