After getting the result in time domain, the frequency of oscillation is obtained by FFT.
得到时域结果后，运用FFT求出了有源天线的振荡频率。
Additional negative feedback is provided to set loop gain to unity at the oscillation frequency, to stabilize the frequency of oscillation, and to reduce harmonic distortion.
为了使振荡频率稳定并降低谐波失真，需要加入一个在震荡频率处能够提供单位增益的负反馈路径。
They "want" to oscillate at a given frequency in the same way that a violin string does — a small amount of energy fed into the system, in almost any form, creates the oscillation.
它们“想”以小提琴琴弦一样的方式在给定的频率上进行振动——在小提琴中，以几乎任何形式馈入系统中的少量能量产生了振动。
The frequency of this oscillation is controlled by the capacitor's ability to store charge and the coil's ability to produce a magnetic field.
振荡频率由电容储存电荷的能力，以及线圈生成磁场的能力所共同决定。
So if now I hang on it a mass of one kilogram, I can calculate the period of one oscillation, and one over the period F is the frequency F, and I believe that is something like 38 hertz.
如果在上面,悬挂1公斤物质，我能够计算出,振荡的周期，1除以周期,等于频率，我相信,等于大概38赫兹。
Electrons are vibrating, and they are vibrating with a certain frequency, and that means there is a certain period of one oscillation.
垫子在震动，它们以某一频率，进行震动，这意味着,存在某一震动周期。
We obtain the relation between the frequency of the oscillation and the instric excitation of the system.
我们得到了系统振荡的频率与内禀元激发的关系。
In this thesis, we brought out an effective method capable of raising maximum oscillation frequency with good phase noise.
在本论文中，我们提出了一个有效的方式把振荡频率提高且有不错的杂讯表现。
The influence of some factors on pressure oscillation is studied by frequency spectrum analysis.
采用频谱分析方法，分析诸因素对压力振动特性的影响。
After discussing the conceptions of power system average frequency and power system oscillation period.
探讨了系统平均视在频率及振荡频率的概念。
The oscillation frequency only was the function of oscillating tube length, not influenced by the spliter.
振荡频率几乎不受分流劈距的影响，它只是振荡管长的函数。
As the shear rate rises, the amplitude of pressure oscillation reduces, whereas the slide velocity, critical slide length and the frequency increase.
随剪切速率的增加，压力振荡的振幅减小，而滑移速率、临界外推滑移长度及振荡频率均有提高。
When the frequency of input approaches that of the intrinsic oscillation, the mean firing rate induced is bigger, the input signal can be effectively processed and amplified.
当信号的频率接近其本征振荡频率时，神经元产生的平均发放率较大，输入信号就能被有效地处理和放大。
Analyzing and experimental results show that a fairly wide range of oscillation frequency can be controlled by a single grounded resistor.
理论分析和实验结果表明：只需调节一个接地的电阻，振荡频率可调范围相当宽；
This paper analyzes the influence of incidence and oscillation frequency of ultrasonic sensor on measuring accuracy. The option principle of ultrasonic sensor is presented.
以时差法为例，分析了超声波探头中超声射线入射角及振荡频率对测量精度的影响，给出了探头的选择原则。
The effect of spring mass on oscillation frequency and elastic constant is discussed by solving the wave equation.
通过求解弹簧中纵波的波动方程，讨论了弹簧质量对振子的振动频率及弹簧劲度系数的影响。
The oscillation fluid equations are established and the resonance frequency of the oscillation fluid is calculated with different combustion chamber shapes.
推导了燃气振荡流方程，计算了对应不同燃烧室形状下燃气振荡流的共振频率。
The paper analyzes the influence of incidence and oscillation frequency of ultrasonic sensor on measuring accuracy and the choose principle of ultrasonic sensor is presented.
文中以时差法为例，分析了超声波换能器中超声射线入射角及振荡频率对测量精度的影响，给出了换能器的选择原则。
The high frequency gain of the regulator is limited to suppress the high frequency oscillation of the control signal while assigning the closed-loop poles.
在配置闭环极点的同时，对调节器的高频增益加以限制，以减弱控制信号的高频振荡。
By analyzing the AD converting results, histogram test of ADC can be taken, and the oscillation frequency can be checked, by which means oscillation test of the analog core is realized too.
通过分析A／D转换结果，可对ADC 进行柱状图测试，并同时检测模拟核的振荡频率，实现对模拟核的振荡测试。
The above experimental result is of value for the mechanism and suppression of low frequency combustion oscillation in an afterburner of a turbofan engine.
上述结果对研究低频振荡燃烧机理和抑制技术有一定的参考价值。
The characteristics of oscillation frequency shift and output power changes of the laser diode are analyzed by using the theoretical model.
基于该模型，分析了激光器振荡频率偏移与输出功率变化特性。
Mechanism of the oscillation instability is then illuminated in frequency domain by amplification at the artificial boundary and multi-reflection of wave motion in a finite discrete model.
根据波在人工边界的放大效应和在有限离散模型中多次反射的概念在频域内阐明了这一常见的振荡失稳的机制。
Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.
频谱分析确定了破裂点脉动和螺旋波的频率特征。
The higher the frequency of alternate current, the higher oscillation frequency of the interface between slag pool and metal pool is, and the less amplitude is.
交流电频率越高，渣-金界面的振荡频率越大，振幅随之减小；
The dynamical equations of rigid flexible coupling multibody systems have characters of stiffness and high frequency oscillation.
刚柔耦合多体机械系统动力学微分方程组具有刚性和高频振荡的特点。
The conclusions provide the important reference for the suppression of low frequency oscillation and stable operation in power system.
所得结论对于电力系统低频振荡的抑制以及电力系统稳定运行具有重要的参考价值。
When stepping motor works in some pulse frequency, it may have the problem of oscillation and miss of synchronization, so it should be avoided at full steam.
在一定控制脉冲频率下，步进电动机可能出现振荡与失步现象，严重影响步进电动机的运行，要严格防止这种情况发生。
When stepping motor works in some pulse frequency, it may have the problem of oscillation and miss of synchronization, so it should be avoided at full steam.
在一定控制脉冲频率下，步进电动机可能出现振荡与失步现象，严重影响步进电动机的运行，要严格防止这种情况发生。
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