谐振

Then a novel control method of PAPF is proposed. PAPF with the proposed control method has excellent performance in damping of both parallel resonance and series resonance, whether the capacitor current is included in the detecting current of PAPF or not. Also the PAPF with proposed method has strong ability in harmonic compensation.

针对这种情况该文提出了一种新的PAPF控制策略，该控制策略可以在进行谐波治理的同时有效抑制负载谐波电流或者系统谐波电压造成的并联电容器与电网阻抗之间的谐振。

This paper,by analyzing the working theory of the voltage stabilizing transformer and the parallel resonance of saturation core coil,explains the influence of the capacitor on the range Voltage stabilization,and also the method to prevent capacitors from being damaged by high vo-ltage is introduced.

通过对稳压变压器工作原理及饱和铁芯线圈并联铁磁谐振的分析，讨论电容对稳压变压器稳压范围的影响。

Passive power filters is adopt widely because it is simple configuration, convenient maintenance, low cost and etc. Otherwise, passive power filters is easy affect by change of system parameters, can' t remove sequential harmonics, and easy arose series and parallel resonance with system.

无源电力滤波器由于其结构简单，维护方便，造价低廉等优点仍然成为目前普遍采用的一种滤波手段，但是无源电力滤波器受到系统结构变化影响较大，不能消除连续谐波，且容易和系统阻抗发生相互作用，引起串联、并联谐振，严重时甚至使系统崩溃。

Three reference current detecting methods are presented for single-phase active power filter, i.e. fundamental current detecting method based on parallel resonance of passive LC filter, fundamental current detecting method based on switched-capacitor filter, harmonic current detecting method based on d-q transformation and its improved circuits.

同样通过采用并联变压器二次侧多补偿绕组的结构来提高有源电力滤波器的容量。4、提出三种单相有源电力滤波器指令电流的提取方法，即基于LC并联谐振的基波电流检测方法、基于开关电容滤波器的基波电流检测方法、基于单相d-q变换的谐波电流检测方法及其改进电路。

The present invention provides a multilayered chip capacitor comprising internal electrodes and external electrodes formed to be perpendicular to the internal electrodes, whereby parasitic capacitance is reduced, resulting in no parallel resonance frequency effects.

本发明提供了一种多层片式电容器，该电容器包括内部电极以及垂直于内部电极形成的外部电极，从而降低了寄生电容，并获得了无并联谐振频率的效果。

Then, base on the equivalent circuit model for cascaded coupled resonator filter, the method for measuring or computing the phase of the reflection coefficient of short-circuit terminated networks and synthesizeing all the inter-resonator couplings and resonant frequencies of the filters to be tuned is studied intensively. The phase loading effect is removed and the tuning steps are analyzed. The method based on the partial fraction expansions of admittance matrix is used to synthesize coupling matrix of the filters under tuning.

然后，通过分析级联耦合滤波器的等效电路模型，着重研究了利用测量或计算终端短路网络的反射参数的相位来综合出待调级联耦合滤波器各个腔体的谐振频率和腔体间的耦合系数的方法，并且消除了端口相位加载的影响，给出了具体的调试步骤；接着利用导纳矩阵部分分式的展开来求得待调滤波器耦合矩阵，着重研究了消除端口相位加载的方法。

But at low pressure, the continuum theory is no longer suitable and only the molecular dynamics method is passably valid. However, there have been yet a few studies on the squeeze film of micro-resonators in the free-molecule regime, and no 3D model of MD has been presented for SFD.

当气压很低时，气体连续介质模型不再适用，只能采用分子动力学方法但是，当前关于自由分子区域中的微谐振器件挤压膜阻尼的分子动力学研究非常少，为了避免计算量过大，还未有三维的挤压膜阻尼分子动力学模型。

The harmonic oscillator is an exceptionally important example of periodic motion.

谐振子在周期运动中是特别重要的。

Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.

利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。

In this study,an open-loop R-FOG is set up using phase modulation spectroscopy.

利用调相谱检测技术，建立了谐振式陀螺的开环响应测试系统。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。