查询词典 frequency modulation

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。

Reflection wave have the action of amplitude and frequency modulation.

反射波具有振幅调谐和频率调谐作用。

Spectrum control technology and its application researchBasic theory of smoothing by spectral dispersion in high-power laser system was studied. Periodical frequency modulation was obtained by chirped pulse stacking, and novel special gratings were proposed here to obtain angular spectral dispersion and temporal smoothing of focal spot.

并在国际上首次成功地应用于激光聚变高功率激光系统中。3、激光脉冲光谱控制技术及应用研究研究了高功率激光光谱色散平滑的基本理论，提出利用堆积啁啾脉冲的周期性光谱调制特性和新颖特殊光栅实现光谱角色散和激光束远场焦斑的时间平滑。

This paper describes a feasible calibration method, its basic principle for calibrating is: A certain function relationship is existed in equivalent inductance L of coil and the distance x between the object to be measured and the sensor coil, the measurements can be conducted with this function relationship by using frequency modulation. The calibrating system consists of measuring electric circuit, high stable voltage power supply, digital frequency meter, the conductor to be measured and the calibrated displacement sensor.

文中叙述了一种较为可行的标定方法，其标定的基本原理为：线圈的等效电感L和被测物体与传感器线圈的距离x存在一定的函数关系，利用这种函数关系用调频法进行测量，标定系统由测量电路、高稳定度稳压电源、数字频率计、被测导体及被校位移传感器组成。

When the signal frequency is varied in response to the modulating signal we have FM frequency modulation.

当信号频率回应我们有 FM 的调整信号被改变的时候。

The key content of the whole essay is that it analyses frequency modulation, intermediate frequency,

本文的核心内容主要是系统分析了中频，调频波，数字模拟转换，模拟数字转换。

Frequency modulation; frequency processing; echolocating; odontocete cetaceans; ultrasound; bioacoustics; sound localization; midbrain; binaural; mesencephalon; auditory cortex; clicks; auditory evoked potentials; inferior colliculus; superior colliculus

调频；频率处理；凭回声定位的方向；odontocete cetaceans；超声；生物声学；声源测定；中脑；两耳的；中脑；听觉皮层；棘爪；听觉诱发电位；下丘；上丘

Based on the theory of frequency modulation,the principle that frequency jittering spreads the spectrum energy of the voltage and current is analyzed.

针对传统的固定频率PWM控制方式引起的波形频谱能量集中、谐波幅值较大的缺点，文章基于频率调制的理论分析了开关频率抖动技术扩散电压频谱以及电流频谱能量的基本原理，结合传统的PWM控制器，采用三角波作为调制信号实现简单的频率抖动的方法。

Its, introduce one kind phase locking of adopting ring frequency synthesizer and 89C51 frequency modulation transmitter where one-chip computer control, have recommended the phase locking to surround performance of the integrated circuit (BU2618FV ) and typical application.

其之，介绍一种采用锁相环频率合成器(BU2618FV)和89C51单片机控制的调频发射机，并介绍介绍了锁相环集成电路（BU2618FV）的性能和典型应用。

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％。