谐振

We can work out positions of a harmonic oscillator by numerical methods.

我们可以按数值方法计算简谐振子的位置。

This paper presents a feed-back dielectric oscillator and a method of calculating its dimension.

本文介绍了反馈型介质振荡器，给出了介质谐振器尺寸的计算方法。

The aim of this research is to use DC link parallel resonance three---phase soft---switching technique to realize in inverter.

本研究课题的目标是三相软开关变频器DC直流环节的并联谐振，实现逆变桥上每个功率开关器件以零电压方式开通，达到软开关的目的。

The aim of this research is to useDC link parallel resonance three---phase soft---switching techniqueto realize in inverter.

本研究课题的目标是三相软开关变频器DC直流环节的并联谐振，实现逆变桥上每个功率开关器件以零电压方式开通，达到软开关的目的。

This paper puts forward a novel DC link parallel resonant soft switching technology. It mainly analyses the topology, working principle of the soft switching inverter. Finally it validates its theory and feasibility through experiment.

该文提出一种新型的直流环节并联谐振软开关技术，重点分析了此种软开关逆变器的拓扑结构、工作原理和特点，并通过实验验证了其原理和可行性。

The ways of parallel resonant DC link and three-level control strategy were used in this power amplifier circuit. Output current ripple of power amplifier can be reduced as three-level power amplifier, all of power switches work on and off under the zero voltage switching or zero current switching, loss of switching and current ripple interference effectively reduced.

该电路在功率放大器三电平控制策略的基础上应用了并联谐振直流环节，保持了三电平功率放大器输出电流纹波小的优点，同时功率器件均工作在零电压或零电流条件下，开关损耗、电流纹波干扰有效地减小。

The phase switches of the proposed SRM converter turn on in zero voltage switchingmode by making use of a kind of parallel quasi resonant DC link circuit,and turn off in ZVS mode by adding a shunt-wound capacitance to every phase switch.

电路采用并联型准谐振直流环节为SRM相开关开通提供零电压条件，给相开关并联电容器则保证了相开关的零电压关断。

The capacitor and the inductor having the double structure form an LC parallel resonance circuit.

电容器和电感器具有形成LC并联谐振电路的双重结构。

Then, the advantages and disadvantages of the two common topologies (series resonance and parallel resonance) are compared, and their switching processes are also analyzed.

详细比较了两种常用谐振电路拓扑的优缺点，着重分析了两种电路换流过程。

The analysis results show that PAPF is effective for parallel resonance damping, but can not damp series resonance when capacitor current is not included in the detecting current. And when capacitor current is included in the detecting current, PAPF is prone to be unstable and can not damp parallel and series resonance.

分析表明，由于无功补偿电容器的影响，传统控制策略下的PAPF对系统谐振的抑制效果不理想，同时当检测的负载电流中包括无功补偿电容器电流时，系统还有可能出现不稳定的现象。

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。