Pinning sampled-data synchronization for complex networks with probabilistic coupling delay

We deal with the problem of pinning sampled-data synchronization for a complex network with probabilistic time-varying coupling delay. The sampling period considered here is assumed to be less than a given bound. Without using the Kronecker product, a new synchronization error system is constructed by using the property of the random variable and input delay approach. Based on the Lyapunov theory, a delay-dependent pinning sampled-data synchronization criterion is derived in terms of linear matrix inequalities （LMIs） that can be solved effectively by using MATLAB LMI toolbox. Numerical examples are provided to demonstrate the effectiveness of the proposed scheme.

Ti-56Al单晶的形变位错结构及反常屈服机制的研究

应用TEM对Ti 56Al单晶 [1 0 3]有序畴区位错结构进行研究 ,并提出修正的钉扎 -解钉模型以解释 1 /2 <1 1 0 ]普通位错不是长而直的纯螺位错及位错碎片不是沿纯螺方向排列等实验现象和反常屈服机制。认为 ,当TiAl合金中的Al含量较低时 ,1 /2 <1 1 0 ]普通位错控制的反常屈服行为可用Viguier的钉扎 -解钉模型解释 ;当TiAl合金中的Al含量较高时 ,1 /2 <1 1 0 ]普通位错控制的反常屈服行为可用本文提出的修正的钉扎 -解钉模型解释。