Standard frequency

Application of standard frequency index method in calculation of Chinese word frequency

标准频率指数统计法在汉语词频统计中的应用

The Application of the Standard Frequency in Television Signals to the Synchro - broadcast

电视信号中的标准频率在同步广播中的应用

A Standard Frequency Synthesizer Using TV Line Synchronization Signal

电视行同步频率综合器的研制

By doing so , there will only be standard frequency error in theory and decrease the measuring error greatly .

这样使测频误差在理论上只含有标准频率误差，可以使测量误差降低。

Ensuring the Standard Frequency of Carbody Bending Vibration of EMUs

电动车组车体弯曲振动标准频率的保证

With application of the standard frequency source and the timer counter , the signal frequency and period are easily measured .

利用单片机内部高稳定度的标准频率源和定时/计数器，可方便地测量信号的频率和周期。

The standard frequency in television signals is a signal with high stability and accuracy , controlled by the atomic clock .

电视信号中的标准频率信号是受原子钟控制的高稳定度、高准确度的信号。

Crystal-controlled secondary standard frequency measuring equipment

晶体控制次级频率标准测试装置

Intelligent Sync Broadcasting Exciter and Standard Frequency

智能同步广播激励器及其标频

A simple standard frequency tunable method which can be used to measure frequency switching time under the rated frequency deviation is presented .

描述了一种能在额定频差下测量频率转换时间的简便方法&标频调偏法。

High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory .

在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。

Frequency standards can provide precise standard frequency . On measuring the functions of frequency standards , high comparison accuracy is needed in the testing system .

频率标准源可以提供精确的标准频率，在测定频率标准源的各项性能指标时，要求测试系统必须具有很高的比对精度。

A small pipe sounding a tone of standard frequency ; used to establish the starting pitch for unaccompanied singing .

发出标准音频的小管；用来建立清唱时的起音。

Rowing technology : based on the full stage of each project by standard frequency and draw from the relationship and both the boat speed from the paddle .

划桨技术：根据对各项目全程阶段划分的标准，从桨频和划距的关系及其两者对艇速的影响关系进行技术分析。

For this signal , a general phase detector can not be used , sample-and-hold phase detector must be used in the phase-locked loop recovering the standard frequency signal .

对于这种信号，在接收端用锁相环路恢复标准频率时，不能使用普通的鉴相器，必须用采样保持鉴相器。

Servo motor control system has replaced hydraulic drive system and become main drive system of printing belt . The standard frequency regulator can control electric machine of printing unit and gain great reliability .

伺服电机控制系统而已取代液压传动系统而成为印花导带传动的主要方式，标准的变频调速器控制印花单元电机，使其可靠性大大提高。

As the ultra stable standard frequency sources , crystal oscillators are widely used on different kinds of high-speed aircrafts . The electronic equipment on these high-speed aircrafts often has to work under a bad vibration environment .

晶体振荡器作为极为重要的基准频率源常常被搭载在各种高速飞行载具上，这类高速飞行载具上的电子设备通常工作在极为恶劣的振动环境下。

The ions can be trapped in the linear ion trap to make the standard frequency source with higher accuracy and stability by the trapping technique using () ~ ( 199 ) Hg ~ + as active medium .

线型离子阱把199Hg+离子作为工作物质，利用离子囚禁技术，制成有很高准确度和稳定度的标准频率源。

Statistical test analysis on design flood standard and frequency calculation method

设计洪水标准与频率计算方法的统计试验研究

Standard high frequency signal generator

标准高频信号发生器

Frequency Standards is the standard of frequency measurement , it based on atomic transfer spectra lines which is high accuracy and stability .

量子频标是频率的测量标准，它是利用原子跃迁谱线的稳定而准确的频率作为参考频率。

The paper develops a power system frequency-tracking algorithm based on iterative technology . The algorithm can achieve the standard on frequency measurement precision by the real-time Fourier-filtering coefficients adjusting .

本文提出了一种采用迭代算法来实现自适应跟踪测量电力系统频率的方法，通过实时调整傅氏滤波系数，来达到频率测量精度的标准。

At present , current solution is DSP + ASIC chip , DSP implements CFA interpolation algorithm , which reconstructs Bayer template CFA image to color image , ASIC chip upgrades the low frame frequency color image of DSP processed to the standard frame frequency of VGA display interface .

目前通用的解决方案是DSP+ASIC芯片，其中DSP实现把贝尔模板CFA图像重构为全彩图像的CFA插值算法，ASIC芯片负责把DSP生成的低帧率全彩图像提升为标准VGA显示接口的帧率。

Acquisition and Transmission of Standard Time , Frequency in Power System

电力系统中标准时间、频率的采集和传输

It is an effective work standard of radio frequency voltage .

它是一种行之有效的射频电压工作标准。

Application on the Standard Time and Frequency Carried by CCTV Signals

电视信号中标准时间频率的应用

A type 8801 measuring standard of ultra-low frequency signals voltage and distortion

一种高准确度超低频电压测试标准&8801超低频电压及失真测试仪

Software for Real Time Monitoring the Time Keeping System at NTSC Standard Time and Frequency Laboratory

NTSC时频基准实验室守时系统自动监测软件

A rational use of double coefficient on frequency standard deviation of frequency standard comparator

频标比对器频差倍增系数的合理取用

Objective To raise the diagnostic standard of high frequency ultrasound for early senile cataract .

目的通过高频超声诊断早期白内障，以提高对早期白内障的诊治水平。