频率调制

The control signals of invertor are produced by space vector modulation to achieve a small torque ripple and constant switch frequency.

以空间矢量调制方法来获得逆变器的开关信号，实现了小的转矩脉动和恒定的开关频率。

We also studied the probability of modulability of light pulse interval in HLS. In 3 years, we have studied the modulators with the switch of thyratron, IGBT and MOSET etc. They are the comparisons between the waveforms, characteristic tests of ferrites made in China, the driver system of MOSET and the design of kicker magnet with the network mode, which have been studied.

三年来，利用重氢闸流管、IGBT、MOSET等开关的调制器，试验能否这样高重复频率快电流的脉冲功率技术，着重进行了脉冲波形成形比对试验研究，国产高频铁氧体性能测试，MOS管驱动控制与网络型冲击磁铁的设计研究。

This technique does not need to modulate the laser.

这种频率锁定的方法不需要对激光器进行调制。

The range of frequencies that can be modulated to carry information on a specific transmission system.

频率范围，经过调制可以在指定的传输系统中携带信息。

White noise generator, can be amplitude modulation, frequency, phase.

白噪声发生器，可以调制幅值，频率，相位。

By using this method,9 switching states were ensured during a sampling period of the matrix converter,and the duration of each switching st...

实验结果表明，采用提出的空间矢量脉宽调制优化调节策略，不仅消除了输出电压中的错误脉冲，而且降低了输出电压的总谐波畸变率，在输出频率为15Hz时，THD降低约15%，有效地提高了矩阵式变换器的输出波形质量，保证了系统的安全可靠运行。

Because of the collective modulation of the periodic dielectric distribution to the incident electromagnetic waves, the directions of the group velocity and the phase velocity can be opposite, a photonic crystal slab can work as a negative refractive-index material.

由于介电函数的周期性分布对入射光的调制作用，使得特定频率区域的入射光在光子晶体中传播时的群速度方向和相速度方向相反，因而使得光子晶体平板表现出负折射特性。

"Modulation Domain"is a plane domain which is consisted of frequency and time signal axes.

"调制域"是由信号的频率和时间两个轴构成的平面域。

"Modulation Domain" is a plane domain which is consisted of frequency and time of signals. It is necessary field to measure signals in three- dimension space of signal(time domain, frequency domain and modulation domain).

调制域是由信号的时间和频率两个轴构成的平面域，是对信号进行三维测量不可缺少的一个测试域。

Frequency mondulation, which is not possible with polychromatic light.

多色光不可能调制频率。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。