谐振

By using the perturbation analysis procedure, it has been provided that, due to the regulating by the cubic nonlinearities, some parametric ranges in which 3-times superharmonic vibration arises exist in the system.

由於立方非线性对系统的调节，系统存在出现3倍超谐振动的参数域。

The fact is provided by simulation that, when the excitation frequency is close to the 3-times superharmonic resonance frequency, the system response consisted of principal response and 3-times superharmonic resonance is stable and periodic.

在出现3倍超谐共振的频率附近，系统的响应为主振动响应与3倍超谐振动响应共同组成的稳定的周期振动。

If the excitation amplitude is constant and the excitation frequency is close to 3-times resonance frequency, the effect of the 3-times superharmonic resonance on the system response increases greatly.

当激励幅值不变、激励频率逐渐接近3倍超谐共振频率点时，3倍超谐振动成分对系统响应的影响逐渐增加，这表明立方非线性对系统的调节作用越来越强。

In this part, the theory and debugging process of a voltage-controlled oscillator using a syntonic cavity with high value of Q.

在这一部分，论文主要介绍了一种用高Q值谐振腔体制作的压控振荡器的原理和调试过程。

This paper describes a piezoelectric drive circuit which can find the syntonic frequency of motor through scanning frequency region based on computer controlling.

提出了一种基于计算机控制的压电超声马达谐振频率自动搜寻系统。

If the ultrasonic power doesn't work at the resonant frequency of mechanical syntonic system, UVC is not able to go along continuously and stably.

若超声波电源的工作频率不能自动跟踪机械系统的谐振频率，超声振动切削就无法持续稳定地进行。

An application system is designed to monitor the parameters in real time in this paper. The paper emphasizes VO characteristic of THE PROBE sensor and syntonic sensor and H2S concentration sensor based on analyzing the working principle of many kinds of sensors.

该系统在分析了目前常用的各类压力、液位和气体浓度传感器工作原理的基础上，着重介绍THE PROBE一体化超声波液位传感器、谐振式压力传感器和硫化氢气体浓度传感器的输入输出特性，完成传感器的选型。

The optimum parameters on syntonic circuit of charge and discharge are confirmed, and two channels glow discharge is realized at the same time. The relationship of output energy, stimulated voltage, and work air pressure of mixed gas is studied experimentally.

对影响气体快放电过程的各种因素，如储能电容与峰值电容的比值、工作气压、充放电电感及输入电压的范围等进行了实验研究，确定了充放电谐振回路的最佳参数，实现了双通道的稳定辉光放电。

This paper designs a kind of fiber grating external cavitysemiconductor laser aim at the domestic or overseas need on syntonic fiberpeg-top and it has been validated in the lab.

针对国内外对谐振式光纤陀螺光源的需要，本文为其设计一个稳定光源——光纤光栅外腔半导体激光器，并在实验室验证其可行性。

Secondly, The paper studies the method and principle of on-line monitoring of partial discharge and presents the monitoring project base on the system which includes high frequency syntonic sensor, anti-jamming control and signal sampling. The method of disturb elimination is given.

通过对变压器局部放电的在线监测原理及方法的研究，提出了有高频谐振电流传感器、抗干扰调节系统及信号采集系统组成的局部放电在线监测方案，并分析了抑制干扰的方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。