Complete Synchronization of Coupled Hindmarsh-Rose Neurons with Ring Structure

Complete synchronization of coupled Hindmarsh-Rose (HR) neurons with a ring structure is studied. The criterion for complete synchronization of coupled neurons with the ring structure is obtained through the stability analysis of the linearized synchronization error system. Numerical simulation is given to test the criterion for a system with three coupled HR neurons.     

Complete Synchronization in Coupled Chaotic HR Neurons with Symmetric Coupling Schemes

Chaos synchronization in an array of coupled chaotic neurons with symmetric coupling is investigated. A criterion for the stability of the synchronization manifold is deduced by transforming the variational equation of the coupled system into a block diagonal one, and the critical coupling strengths for synchronization in different coupled cases are given. As examples for illustration, the HR neurons with the open-ended （i.e. chain）, ring, star and all-to-all （i.e. global） coupling schemes are considered. It is shown that the coupling scheme plays an important role in synchronization and information transmission of neurons.     

Planar motion and stability for a rigid body with a beam in a field of central gravitational force

Planar motion for a rigid body with an elastic beam in a field of central gravitational force was investigated, and both of the orbital motion and attitude motion were under consideration. The equations of motion of the system were derived by the variational principle, and on view point of generalized Hamiltonian dynamics, the sufficient conditions for the stability of one class of relative equilibria were given by the energymomentum method.     

一类带有时滞的动力系统的几个定理与应用

本文通过李雅普诺夫泛函方法获得了一类带有时滞的动力系统的运动稳定性、有界性、周期运动存在性和平稳振荡存在性的几个定理，并给出了时滞范围的简明表达式．最后，应用获得的定理解决了几个实际问题．     

中心引力场中刚-弹耦合系统平面运动的相对平衡点的稳定性

研究了中心力场中的刚-弹耦合系统的平面运动动力学, 综合考虑了系统轨道运动与姿态运动, 利用变分原理给出了系统的运动方程. 并以广义Hamilton力学的视点, 利用能量-动量方法给出了一类相对平衡点的稳定性条件.     

有扩散不稳定性的四阶反应-扩散系统的空间周期结构

本文利用分叉理论研究一个含参数的有扩散不稳定性的四阶反应-扩散系统的空间周期结构问题,其中扩散项服从Cahn-Hillard广义扩散定律。首先通过稳定性和奇异性的分析得到从空间均匀定态产生空间周期定态的判别准则,然后利用奇异摄动方法获得这个空间周期定态的二阶近似解。本文的理论结果很好地符合文献[3]中的数值结果。 关键词：     

Rhythm Synchronization of Coupled Neurons with Temporal Coding Scheme

Encoding information by firing patterns is one of the basic neural functions, and synchronization is important collective behaviour of a group of coupled neurons. Taking account of two schemes for encoding information （that is, rate coding and temporal coding）, rhythm synchronization of coupled neurons is studied. There are two types of rhythm synchronization of neurons： spike and burst synchronizations. Firstly, it is shown that the spike synchronization is equivalent to the phase synchronization for coupled neurons. Secondly, the similarity function of the slow variables of neurons, which have relevant to the bursting process, is proposed to judge the burst synchronization. It is also found that the burst synchronization can be achieved more easily than the spike synchronization, whatever the firing patterns of the neurons are. Hence the temporal encoding scheme, which is closely related to both the spike and burst synchronizations, is more comprehensive than the rate coding scheme in essence.     

各向异性相态场模型的Gibbs—Thompson关系

本文利用奇异摄动的内、外解匹配方法,分析了各向异性时在相态场模型的边界层上表面张菌、法向速度、平均曲率和各向异性函数的影响,得到了各向异性时的Ｇｉｂｂｓ－Ｔｈｏｍｐｓｏｎ关系,以及边界层所满足的方程。     

耦合Van der Pol-Duffing振子的强共振分叉解

本文用多尺度方法研究了一非线性耦合Ｖａｒ ｄｅｒ Ｐｏｌ－Ｄｕｆｆｉｎｇ振子在强共振情形下的分叉解,研究表明,当分叉参数取不同值时,此系统将出现单个振子的周期运动、两个振子的锁频分叉运动和拟周期分叉运动,同时,本文也给出一些数值结果,以验证理论的正确性。     

时变参数系统的非完全分岔及其在Duffing方程中的应用

提出新的方法从本质上研究时变参数系统的非完全分岔问题。通过建立时变参数系统的解的线性近似定理去分析时变分岔方程运动的分岔转迁滞后和跃迁现象。利用Ｖ函数预测分岔转迁值,将新方法应用于Ｄｕｆｆｉｎｇ方程,获得一些新的分岔结果和关于解对初值和参数的敏感性结论。