查询词典 radio-frequency spectrum

Experiments shows that it can detect the carrier frequency and the low frequency of modulation signal as expected, the resolution of the carrier frequency is 0.3Hz,the detecting error is within ±0.5Hz, and the resolution of the low modulation frequency is 0.07Hz, the detecting error is within ±0.05Hz.

实验结果表明该检测仪能很好地检测出信号的载频和信号的低频调制信息，其中信号载频的分辨率为0.3Hz，误差范围在±0.5Hz 以内，低频信息的分辨率可达0.07Hz，信号的误差在±0.05Hz。

A new frequency estimation algorithm for Time Domain Synchronization OEDM system is proposed, which utilizes the time domain circular characteristic of PN sequences to adjust frequency offset and then uses a variable step frequency scan scheme to estimate large frequency offset.

提出一种新的适用于TDS-OFDM系统的频偏估计算法，利用PN序列的时域循环特性进行预频偏调整，然后用变步长扫频进行大频偏的估计，定时同步之后再利用PN的时域循环特性进行细偏估计。

Below us Divider VHDL description of the source code for the completion of the clock signal CLK frequency of 2 hours, 4 frequency, frequency of 8 hours, 16 minutes frequency.

下面我们介绍分频器的 VHDL 描述，在源代码中完成对时钟信号 CLK 的 2 分频， 4 分频， 8 分频， 16 分频。

To review the basic terminology in data organization and data presentation 2 To learn frequency distribution and cumulative frequency distribution 3 To construct the graphical representations: histogram, frequency polygon, and culmulative frequency polygon

回顾数据组织及数据表达的基本用语。学习频数分布及累积频数分布。绘制如组织图、频数多边形及累积频数多边形等的图示。

So the frequency of pulse drive mode amounts to the frequency of external signal, and the operate frequency of driver should be below the frequency of MOSFET.

本论文所涉及的工作对半导体激光器的广泛应用具有积极意义，它解决了半导体激光器应用中存在的关键问题。

This design paper introduced one kind based on the DSP chip entire numerical control single-phase frequency changer design, along with the frequency conversion velocity modulation technology unceasing development, the frequency changer application is more and more widespread, the frequency changer besides has the remarkable velocity modulation performance, but also has the remarkable energy conservation function, is the enterprise technological transformations and the

本设计论文介绍了一种基于DSP芯片的全数字控制单相变频器的设计，随着变频调速技术的不断发展，变频器的应用越来越广泛，变频器除了具有卓越的调速性能之外，还有显著的节能作用，是企业技术改造和产品更新换代的理想调速装置。

This design paper introduced one kind based on the DSP chip entire numerical control single-phase frequency changer design, along with the frequency conversion velocity modulation technology unceasing development, the frequency changer application is more and more widespread, the frequency changer besides has the remarkable velocity modulation performance, but also has the remarkable energy conservation function, is the enterprise technological transformations and the product renewal ideal speeder.

本设计论文介绍了一种基于DSP芯片的全数字控制单相变频器的设计，随着变频调速技术的不断发展，变频器的应用越来越广泛，变频器除了具有卓越的调速性能之外，还有显著的节能作用，是企业技术改造和产品更新换代的理想调速装置。

The paper introduces application of frequency speed control ler on high-voltage plunger pump from frequency control moter speed theory,frequency speed contrcller volume defined and model selection,controlling optimizing and frequency speed control ler's installation,using,keeping.

从变频调速原理、变频调速器容量确定及选型、控制方式优化及变频调速器的安装、使用、维护等方面入手，介绍了变频调速器在高压柱塞泵上的应用情况；并总结出了处理变频调速下电机发热的方法；最后，对变频调速器的优越性能及节能效果进行了分析计算。

In series capacitance,the low frequency is load resonance frequency.In parallel capacitance,the high frequency is load resonance frequency.

在串联电容时，负载谐振频率是两个频率中的较低的那个频率，而在并联电容时，负载谐振频率则是其中较高的那个频率。

The noise frequency modulation signal was particularly analyzed. The Fokker-Planck equation of noise frequency modulation was presented and the Motion-Group Fourier Transform was used by converting the partial differential equation into the variable coefficient homogenous linear differential equations. Then the solutions were given by using the peano-baker series. So the probability density function of noise frequency modulation in the filter was given. On the basis of the probability density function the stochastic resonance of noise frequency modulation signal is analyzed.

首先建立了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后所满足的福克尔－普朗克方程，然后利用群移傅立叶变换（Motion-Group Fourier Transform，MGFT）将此偏微分方程化成了变系数齐次线性微分方程组，并利用Peano-Baker级数法给出了该方程组的解，最后得到了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后的概率密度函数，在此基础上研究了噪声调频干扰信号造成的随机共振现象。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。