振子

In the first part,we use adjoint operator method and matrixrepresentation method to compute normal forms of higher order for nonlinear dynamicalsystems with Z2—symmetry and Z2—asymmetry.

在第二部分里，利用多尺度法、规范形理论、普适开折理论、Melnikov方法和Petrov方法分别研究了参数激励作用下非线性振子、参数激励与强迫激励联合作用下非线性振子的局部分岔、余维2退化分岔、余维3退化分岔和全局分岔。

Transition probabilities, oscillator strengths, and lifetimes of configurations, multiplets, and individual lines for many-electron atoms and ions are studied employing the WBEPM theory. Transition probabilities and oscillator strengths for alkali metal atoms, alkaline-earth elements Be, Mg, Be , and Mg , carbon atoms and its ions , nitrogen atom and its ions , oxygen atoms and its ions , fluorine atom, Ne , and IB elements are calculated. Lifetimes of C, N, and O atoms are evaluated as well.

运用WBEPM理论对多电子原子和离子的组态、谱项和能级间的跃迁几率、振子强度以及辐射寿命进行系统地研究，计算了碱金属原子、碱土金属的Be、Mg原子及其一价离子、C原子及其离子、N原子及其离子、O原子及其离子、F原子、Ne离子和重金属IB族原子的跃迁几率和振子强度以及C、N、O原子的辐射寿命。

Based on the equivalent circuit, the resonance frequency equation is derived and the expression of the resonance frequency is obtained.

在此基础上，得出了振子空载时共振频率方程和振子共振频率的表达式。

Using photoelectric timer to time a linear oscillator,the displacement-time curve is obtained,and the simple harmonic motion of the linear oscillator is demonstrated.

利用光电计时器记录弹簧振子经过已知点的运动时间，由实验数据画出振子的位移-时间图像，即得到简谐运动的图像，并应用该原理制作了演示简谐运动图像的装置。

Utilizing the theory of Lur\'e system,the paper studies the practical synchronization of the system composed by nonidentical cells coupled through quorum sensing.This type of synchronization,which implies the dynamics of each cell is similar but with small difference,is a common kind of phenomenon.

本文利用相约化方法将振子网络的状态方程转化为相应的相方程，然后通过对其相方程进行分析，证明了耦合极限环振子网络在很弱的平衡耦合下就可以实现相同步。

It is concluded that at the boundary of BriUouin Zone there is a strong broadening in the magnon linewidth and softening.

发现在布里渊区边界区域磁振子谱的软化和磁振子谱线增宽最明显。

K.The influences of longitudinal phonon and transverse phonon on the magnon damping are compared,and the influences of all relevant parameters on magnon damping are also discussed.

比较了纵向声子与横向声子对磁振子衰减的影响，也讨论了各项参数的变化对磁振子衰减的影响。

By Matsubara-Green function method,the magnon damping under such on interaction is studied,with the magnon damping calculated on the main symmetric point/line in Brillouin zone for different parameters in the system.

利用格林函数方法研究了磁振子-声子相互作用下的二维绝缘铁磁体的磁振子衰减，计算了布里渊区的主要对称点线上的-ImΣ*(1)。

In this paper the retortion piezoelectric actuators were used to control vibration with the optimal initiative and PIE control method in a single-Link FRM system.

本文提出了用扭转压电振子作为主动抑振的动力源，以代替传统的用关节电机抑振的不足，为此研制了压电式主动关节抑振器，建立了单连杆柔性机械臂实验系统，采用振动抑制最有效的主动控制技术和PID控制算法实施系统的抑振。

The relation of pre pressure, excitation volt for longitudinal vibration,excitation volt for torsional vibration, friction force, torque output, speed of rotor, and vibration speed of torsional vibrator is discussed.

根据模型讲座了预压力Fpre、纵振激振电压Vl、扭振激振电压Vt、摩擦力f、电机的输出扭矩Mout、转子转速ωR和扭振子振动速度ωV等的关系。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了