频率调制

Frequency modulation ; magnetic rotation spectroscopy ; absorption line shape ; dispersion line shape.

频率调制；磁旋转光谱技术；吸收线型；色散线型

Pulse, Amplitude and Frequency modulation are all available.

脉冲，幅度和频率调制都可用。

Optimal methods are also presented on system control methodology (current control and pulse frequency modulation) and frequency compensation.

根据研究结果提出系统在控制方法选择（电流控制和脉冲频率调制）和频率补偿方面的优化办法。

The framework of digital frequency modulation exciter is proposed, and the realization scheme of stereo signal composition and frequency modulation is studied.

提出了数字调频激励器的总体框架，研究了立体声信号合成和频率调制的数字实现方案。

The most pioneer work in this dissertation is the study of frequency modulation of light.

本论文最具有开创性的工作是对光路频率调制的研究。

Most common form of frequency modulation in which two possible states are transmitted as two separate frequencies.

最常用的一种频率调制方式，其中两个可能的状态(1和0)是作为两个离散的频率来传输的。

The jammer receives the radar signal and modulates it in frequency domain, and then the modulated signal is retransmitted.

阐述了利用正弦信号进行频率调制的干扰机理，分析了干扰信号的频率特性，推算了决定干扰效果的各项关键参数。

The Hilbert amplitude envelope of the stator current includes the low frequency of fault characteristic, thus it can reduce the signal length by resample the Hilbert amplitude envelope of the stator current by downsampling, which can avoid spectrum aliasing. Then it can reduce the computation time of the MUSIC Method for the spectrum analysis to the resampled signals for the given bandwidth. Meanwhile combining continuous subdivision Fourier transform and rotor slot harmonics based slip estimation it can in advance estimate the concrete values of the fault characteristic frequency, and then inquiry purposely the fault feature component information in the stator current spectrum in order to accomplish the broken rotor bar fault with high sensitivity and h reliability, which eliminates adverse effect of issuable false peaks to the fault detection and formed a novel scheme to detect broken rotor bar fault.

定子电流Hilbert幅值包络信号包含了低频的故障特征频率调制信号，故通过对定子电流Hilbert幅值包络信号进行降采样率重采样、减少分析信号长度，可避免低频段频谱混叠，再对减少的重采样数据进行具有超分辨率的MUSIC低频段估计，可大大降低MUSIC算法频谱估计时间；运用连续细化傅里叶变换和转子齿槽谐波转差率估计技术，可预知故障特征频率精确值，从而可有目的地查询故障分量，消除MUSIC虚假波峰对故障检测混淆的影响，大大提高了故障检测的灵敏度和可靠性，以此形成异步电动机转子断条故障检测新方法。

Examples of suitable spin functions include frequency-modulated and amplitude-modulated sine waves.

合适的旋转函数的例子包括频率调制和幅度调制的正弦波。

After this text introduced and will imitate the audio frequency signal processing as numerical signal after red shoot outside, the numerical signal that will receive again solution adjust after the audio frequency power enlarger enlarge restore in order to imitate the speech signal, shot the electric circuit outside analyzed to design the audio frequency signal before collecting the electric circuit, signal placed the big electric circuit, frequency to make the electric circuit, red, red circumscribed to accept the electric circuit,, frequency the solution adjusted the electric circuit and audio frequencies to enlarge the electric circuit etc.

本文介绍了将模拟音频信号处理为数字信号后经红外发射，再将接收到的数字信号解调后经音频功率放大器放大后还原为模拟语音信号，在分析设计了音频信号采集电路、信号前置放大电路、频率调制电路、红外发射电路、红外接收电路、、频率解调电路以及音频放大电路等各组成部分。

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。