振子

Applying the Large-scale multi-configuration Dirac-Fock wave functions, we calculated the parameters such as wavelength, oscillator strengths and excited energy for the transitions related to lightning spectra. The most important effects of relativity, correlation, and relaxation are included in the computational model. Comparison of the calculated results with experimental spectra shows that the spectra in plateau area have a distinctive characteristic. Beside the lines of lower excited state with n=3 in NII ions, transitions of NI and OI are increased, their excited energy is around 13~14eV, and there are rarely lines from OII ion.

将原子结构的理论应用於闪电光谱的研究，用多组态Dirac-Fock方法，计算了有关光谱线的波长、振子强度以及相应的激发态能量等参数，理论与试验观测资料进行比较分析后发现，高原地区闪电首次回击光谱的结构及跃迁特性与其他地区有明显的区别，除NII离子n=3的低激发态产生的跃迁谱线外，激发能量为13~14eV左右的中性NI和OI的跃迁增多，但很难观测到OII离子的跃迁谱线。

A pplying the Largescale multiconfiguration DiracFock wave functions, we cal culated the paramete rs such as wavelength, oscillator strengths and excited energy for the transitio ns related to lightning spectra. The most important effects of relativity, corre lation, and relaxation are included in the computational model. Comparison of th e calculated results with experimental spectra shows that the spectra in plateau area have a distinctive characteristic. Beside the lines of lower excited state with n=3 in NII ions, transitions of NI and OI are increased,their excited energy is around 13～14eV, and there are rarely lines from OII ion.

将原子结构的理论应用于闪电光谱的研究，用多组态DiracFock方法，计算了有关光谱线的波长、振子强度以及相应的激发态能量等参数，理论与试验观测资料进行比较分析后发现，高原地区闪电首次回击光谱的结构及跃迁特性与其他地区有明显的区别，除NII离子n=3 的低激发态产生的跃迁谱线外，激发能量为13～14eV左右的中性NI和OI的跃迁增多，但很难观测到OII离子的跃迁谱线。

For the purpose of facilitating the analysis, a simplified coupling model of the ossicular chain and the piezoelectric actuator is constructed.

为了辅助分析，建立了听骨链与振子的简化相合力学模型。

We can see that the low energy states absorption of Ho〓, Er〓, Tm〓 in oxyfluoride glass-ceramics sample is strong. Strong absorption makes for high pump efficiency, and easy to sensitization. Further more, strong absorption in wide frequency range will be avail to the choice of pump sources.

研究发现Er〓、Tm〓与Ho〓离子在氟氧化物玻璃陶瓷中各低能激发能级均有较强的吸收，相应的吸收跃迁振子强度有较大值，因此可选择的泵浦波长较多，同时，强的吸收将产生高的泵浦效率，且利于敏化。

The oscillator strength and integrated emission section value of 〓H〓→〓I〓(521 nm) for Er〓 ions in visible wavelength is large, it means that Er〓 doped oxyfluoride glass-ceramics may be lase in short wavelength.

Er〓离子可见光波段的几个通道如〓H〓→〓I〓（521nm）有大的振子强度，积分发射截面和较高的荧光分支比，有可能实现短波长的激光输出。

In the second part of this work, a computor program is developed to calcalate〓L〓energy levels, reduced matrix elements, crystal field energy levels, oscillator strengths of f-f transition and theoretical f-f absorption spectra of f-ions. The calculation results of the f-f absorption spectra of Nd in water coordination sphere and H di (2-ethylhexyl phosphinic acid coordination sphere with different symmetric structure are shown and compared with observed spectra.

在第二部分中，编制了计算f离子的〓L，能级、约化矩阵元、晶体场中Stark能级分裂、f-f跃迁振子强度及f-f理论吸收光谱的计算机程序，以此程序分别计算了Nd在不同结构对称的水配位层及烷基磷酸配位层中的f-f吸收光谱，通过与实验谱比较，识别了可能的配位层结构，并讨论了f-f跃迁的强度机理。

A Quadrifilar Helix Antenna is adopted for the platform positioning and a horizontal monopole using the cylindrical wall of the cavity as its ground is adopted for communication.

定位天线采用四绕螺旋天线；通信天线采用以腔壁为地的水平单极振子。

The analysis of dynamic response of the modulation and the demodulation circuit s and the auxiliary car- rier wave amplifier have been considered more in details.

所用方法是差分方程求解法，因为用差分方程来描述具有机械振子的调制解调线路的固有工作过程，要比用相同的初始条件的微分方程来描述更为准确。

Seventhly, Using the design method of single terminal reverse switching inverter, a driving and controlling circuit of the rod-shaped motor with two phases and high frequency was realized.

第五，提出了具有棒形结构特点的驻波直线型超声电机驱动振子优化的动力学设计目标和压电元件配置方案，并提出了相应的动力学设计方法。

Then we deal with the new system with a method similar to the one we have applied to the sublinear equation. At last, we can get infinitely many subharmonic bouncing solutions for the old impact system.

然后采用与讨论次线性Duffing方程类似的思想来处理新的碰撞系统，从而得到原碰撞振子的无穷多次调和弹性解的存在性。

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