频率调制

The modulation depth is focused on the intensity change of the protuberant part of the PSD curves.

计算和分析结果表明PSD分析结果能够在频率域反应出元件表面受到的不同程度的调制信息。

Aircraft navigation system, one or more ground navigation station with the provisions of the frequency of launching radio beacon signals (such as wave, audio wave modulation or code), aircraft flight navigation equipment according to the received beacon signal measured or calculated aircraft Solutions relative to the navigation ...

飞机导航系统中，一个或几个地面导航台用规定的频率发射无线电信标信号（等幅波、音频调制波或代码），飞机机上导航设备根据收到的信标信号测出或解算出飞机相对于导航。。。

Aircraft navigation system, one or more ground navigation station with the provisions of the frequency of launching radio beacon signal (amplitude wave, audio wave modulation or code), aircraft flight navigation equipment according to the received beacon signal measured or calculated aircraft Solutions relative to the navigation ...

飞机导航系统中，一个或几个地面导航台用规定的频率发射无线电信标信号（等幅波、音频调制波或代码），飞机机上导航设备根据收到的信标信号测出或解算出飞机相对于导航。。。

The objective of DC power modulation is to damp the relative swing of angle and frequency of the two areas from COI.

直流输电线路功率调制的目标是阻尼区域COI功角和频率间的相互振荡。

For instance took when frequency synthesizer, emphasizes is the switching time, the frequency spectrum purity, took when modem emphasizes is the ring circuit band width and so on.

比如作为频率合成器时，强调的是转换时间，频谱纯度，作为调制解调器时强调的是环路带宽等。

The pump eliminates the effect of channel-length modulation and makes the charging and discharging currents match perfectly in a wide output range to minimize the ripple of the control voltage.

该电荷泵结构可以很好地克服沟道长度调制效应的影响，使充放电电流在宽输出电压范围内实现精确匹配，从而使频率综合器的压控电压纹波很小。

A new strategies for restraining harmonics are presented in the paper, the methods adopt the right carrier frequency and the sine wave superimposed a proper three-time harmonics to make it saddle-shaped wave, produce SPWM waveform to control the inverter switching devices for the on and off .

并提出了一种新的易于工程实现的谐波抑制策略，该方法通过正确选择载波频率和在正弦调制波上叠加一个三次波使之成为鞍形波，产生相应的SPWM波形来控制逆变器开关器件的通断从而改善输出波形。

The scattering theory based on the equivalent vibrating scattering center and the mathematical model of the modulation are introduced.

在数学建模的基础上，论证了选取雷达回波的机械振动调制频率序列作为目标识别特征的可行性。

This paper introduces a system solution of modulation domain analyzer and it s principle of meas- uring frequency and time interval.

本文介绍了一种调制域分析仪系统方案及其测量频率与时间间隔的工作原理。

When sound intensity is not very high, the experimental results are consistent with the theoretical values.

实验结果表明：强声场对流场有很强的调制作用，使流场产生了与声波同频率的周期性脉动，且脉动幅度随着声场强度的增加而增大。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。