查询词典 difference frequency

Noise Measuring And Analyzing Instrument: Sound Level Meter, Noise Dose Meter, Noise Statistics And Analysis Meter, Noise Person Exposure Meter, Frequency Octave And 1/3 Frequency Octave Filter

噪声测量分析仪器：声级计、噪声剂量计、噪声统计分析仪、个人声暴露计、倍频程和1/3倍频程滤波器

In order to probe into the anti-friction mechanism and effectiveness of turbulent zone of flexible pipe ,extensometer with high accuracy and high-frequency response characteristics is used to study the frequency variation feature of flexible pipe s outer diameter with Reynolds number.

为探讨柔性管的紊流区域减阻效果的产生机理，采用高精度高频率响应特性的应变仪对柔性管外径随雷诺数的频率变化特性进行了研究。

Moreover, PT4107 provides a low-frequency PWM dimming input that can accept an external control signal with duty ratio of 0-100% and a frequency of up to a few kilohertz.

而且，PT4107提供了一种低频PWM 暗淡的输入能接受外部控制信号与责任比0 - 100%和频率一些千赫。

Taking WindowsXP,Microsoft EXCEL and VBA as tools,a series of software system on hydrologic frequency analysis which integrated the ability of graph and calculation was developed.And it contained four kinds of frequency distributions:Γ-distribution,extreme value distribution,normal distribution and logarithmic normal distribution.

以Windows XP，Microsoft EXCEL和VBA为开发环境，研制了一套集绘图与计算于一体的水文频率分析软件，其中包含了常用的Γ分布、极值分布、正态分布和对数正态分布4种频率分布线型。

A false signal in telecommunication links from beats between signal frequency and sampling frequency .

在脉冲编码调制中，信号频率和取样频率之间的差拍所引起的伪信号。

Electronics A false signal in telecommunication links from beats between signal frequency and sampling frequency.

假信号：信号频率和取样频率之间的拍子在无线电通信线路产生的假信号 adv。

The subsequent signal recovered from the samples will not contain the high frequency component of the original signal and will display a false low frequency signal.

以低于信号中最高频率两倍的频率进行信号取样时出现的一种效应，即当由取样状态还原时，还原后的信号将不再含有原来信号中的高频成分，并将显示出虚假的低频信号。

Signal recovered from the samples will not contain the high frequency component of the original signal and will display a false low frequency signal.

以低于信号中最高频率两倍的频率进行信号取样时出现的一种效应，即当由取样状态还原时，还原后的信号将不再含有原来信号中的高频成分，并将显示出虚假的低频信号。

In the end, the main content of this dissertation is addressed.In chapter 2, based on the analysis of present vibrators principle and structure, two kinds of transfer functions and frequency response curves of the vibrator, driven by voltage feedback power amplifier and current feedback amplifier, are given separately. And turnover frequencies between different frequency rangs are also given.

第二章分析了标准振动台的工作原理和结构，在此基础上，建立了标准振动台的机械和电气方程，给出了恒压源和恒流源功放激励下的振动台传递函数及幅频、相频特性曲线，列出了不同频段间的转折频率。

Among them 168 cases cut by high frequency instrument,accounting 60.43 percents.64 cases cut by radiofenqency instrument accounting 23.02percents.46cases cut by joint treatment accounting 16.55percents.conclusions it is a safe and effective methods to cure the peptic polyps by radiofrequency and high frequency under gastroscope.it is more effective than only using singal instrument and it decreases the occurrence rate of bleeding and fenestrate of alimentary canal.

内镜下射频及高频联合治疗消化道息肉是一种安全有效的方法，比单用效果更为确切，并降低了治疗后消化道出血和穿孔的发生率。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。