United States Frequency Standard?
美国标准频率 USFS?。
Calcium is one prospective element for the modern optical frequency standard.
钙原子是现代光学频率标准的一种很有前景的原子体系。
Phase comparison is a high precision comparing method for frequency standard.
比相法是一种高精度的频标比对方法。
Voltage controlled crystal oscillator (VCXO) plays an important roll in the atomic frequency standard.
压控晶体振荡器是原子频标的重要组成部分。
The performance of frequency calibrator is directly related to precision transfering frequency standard.
校频仪的性能，直接关系到传递频率标准的精度。
The Timing System could provide the 1PPS, 10PPS frequency standard and corresponding timing to user side.
本时间统一系统向用户端提供1PPS、10PPS两种时间信号及其各自对应的时间信息；
This uncertainty is one of the critical factors governing the accuracy level of the cesium fountain frequency standard.
此项频移误差是决定铯原子喷泉频标准确度总体水平的主要因素之一。
Waveform distortion of super low frequency standard shaker is an important factor which influences the calibration precision.
波形失真度是影响超低频振动计量校准精度的重要因素。
The main part of the platform is the production of arbitrary signal driVe source and high frequency standard signal driVe source.
诊断平台的主要部分是任意信号激励源和高频标准信号激励源的产生。
A programmable divider used in frequency synthesizer of Rb frequency standard is designed, and the improvement of programmable divider is introduced.
对铷频标中的频率合成器内的程序分频器进行了设计，并介绍了改进后的程序分频器。
Analyses failures of XSR type of Rubidium atomic frequency standard used in our factory, and introduces the situation of particular overhaul in detail.
对我厂的频率标准X SR型铷原子频标发生的故障及具体检修情况作了较详细的分析和介绍。
A portable laser system, continually working for very long period, is the key part in realization of an optically pumped cesium beam frequency standard.
长期连续工作的袖珍激光系统是实现实用的光抽运铯束频标的关键。
Atomic frequency Standard is the frequency and time benchmark of space technology and time awarding system, directly determining the quality of satellite communications.
原子频标是空间技术和授时系统的频率与时间基准，直接决定了卫星通信的质量。
The design method of normal frequency standard signal source, which utilizes program control digital wave synthesis technology and achieved by microcontroller was given.
采用程控数字波形合成技术，通过单片微型计算机系统实现了工频标准信号源。
The formula of waveform distortion is obtained by the approximate result expression of nonlinear equation about ultra low frequency standard vibrator with this kind of emulsion pipe spring.
同时求解了采用该乳胶管弹簧下的超低频标准振动台的运动方程近似解，得到了波形失真度计算式。
A construction layout about flexible, convent, new type, multi parameter, high accuracy, large volume data acquisition system for the Rubidium atomic frequency standard test is put forward.
提出了一种用于铷原子频标实验的灵活、方便的新型多参数、高准确度、大容量数据采集系统的构成方案。
For testing daily frequency drift of rubidium frequency standard, this paper used the method of time difference, designed daily frequency drift measuring equipment for rubidium frequency standard.
针对铷频标日频率漂移率的指标测试要求，文中采用时差法，设计了铷频标日频率漂移率测量装置。
The European HiperLAN standard operates in same frequency band as the U-NII.
欧洲超级无线局域网的标准工作频率与 U-NII 相同。
The Six Sigma Black Belt should be able to compute the mean and standard deviation from a grouped frequency distribution.
六西格玛黑带应该能够计算出一个分组发生频次分布数据的均值和标准偏差。
If you wanted to see the average, count, Max, and standard of the frequency values, you can use code similar to Listing 8.
如果想要看到频率值的平均值、统计数、最大值和标准值，可以使用类似于清单8中的代码。
The 802.11g standard is a non-straightforward extension of 802.11b; its purpose is to increase bandwidth on the same frequency.
11g标准是802.11b非直接扩展；它的目的是在频率不变的条件下增加带宽。
IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3 kHz to 300 GHz, IEEE Std C95.1, 2005.
《电机和电子工程师学会人体接触射频电磁场安全水平标准：3千赫至300千兆赫》，IEEEStd C95.1, 2005年。
The studies used food frequency questionnaires to follow up the participants every four years, asking how often, on average, they ate a standard portion of each fruit.
该研究使用食物频率问卷来追踪参与者每四年一次，关于多久一次，平均而言，每种水果他们所吃的量都是标准的。
According to the national standard test methods, the frequency response of winding deformation curve was obtained through testing and analyzing the transformer winding model.
参照国家标准的测试方法，对变压器绕组模型进行了测试、分析，得到了绕组变形的频率响应特性曲线。
Radio Frequency Identification technology based on international standard ISO14443A has been mature and applied in many aspects.
基于ISO14443A国际标准的射频识别技术已经成熟，并得到广泛应用。
This is the basis for the well - known cesium clock, presently the standard of frequency and time.
这就是众所周知的铯原子钟的基础，它是目前的频率和时间基准。
The entire available frequency spectrum is used with 79 hops of 1mhz bandwidth, analogous to the IEEE 802.11 standard.
以1M hz带宽79跳来利用这个完整的可用频谱。
Intrusion detection - Very-high frequency motion detectors - Specific standard.
侵入检测。甚高频运转检测器。专用标准。
Standard configuration is sidle frequency conversion motor drive & dec optional configuration is servo motor drive.
标准配置横行变频马达驱动，可选购横行伺服马达驱动。
Statistics histogram data processing scheme is designed. Standard deviation of frequency modulation is found out according to normal distribution characteristics.
设计了统计直方图数据处理方案，按照正态分布的特性找出了寄生频率调制的标准偏差。
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