The performance of VCXO must be excellent so as to maintain the inherent frequency accuracy and stability of the atomic standard.
要使晶体振荡器的输出信号保持原子标准所固有的频率准确度和稳定度，所用压控晶体振荡器必须具有优良的性能。
The current best theory to explain the interactions of sub-atomic particles is known as the Standard Model.
“标准模型”被认为是现行解释亚原子微粒之间相互作用最好的理论。
National Institute of Standards and Technology researchers are developing atomic clocks based on the element ytterbium that could outclass cesium atomic clocks, which currently set the standard.
美国国家标准技术研究所的研究人员正在开发一种镱原子钟，这种原子钟可能比铯原子钟更好。目前的时间标准是由铯原子钟确定的。
For the standard analytical method, the series of standard solution for the determination of As, se and Hg in water by atomic fluorescence spectrophotometry must be prepared for every test.
在标准分析方法中，采用原子荧光分光光度法测定水中砷、硒、汞所用的标准溶液系列必须每次配制，给工作带来很大的不方便。
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。
The lead concentration in Pb-Sn alloy plating bath was determined by standard additional atomic ab-sorption spectrometry, and the optimal determination conditions were obtained.
采用标准加入原子吸收分光光度法测定铅锡合金锭液中铅的浓度，试验确定了最佳的测定条件。
Mothods The morphology of Mg standard strains and clinical isolates were observed under electron microscopy (EM) and atomic force microscopy (AFM).
方法用电子显微镜及原子力显微镜对生殖支原体标准株及分离株进行形态学的初步观察。
Objective: to develop a new method for determination of iron in milk powder by standard addition method-flame atomic absorption spectrometry with AGAR suspension sampling technique.
目的：建立用琼脂悬浮液进样，标准加入火焰原子吸收法测定奶粉中铁的方法。
The serum nickel was determined by Zeeman graphite furnace atomic absorption spectrometry and standard addition with calibration.
的硝酸稀释，用石墨炉标准加入校正法、塞曼背景校正，进行血清镍检测。
The result is consist with of atomic absorption spectrometry. Standard error 0.014 ~ 0.028, variation coefficient1.14~2.26%, recover96 ~ 103%.
该分析方法的测定结果与原子吸收法测定结果一致，标准偏差在0．014～0．028之间，变异系数在1．14～2．26％，回收率在96～103％范围内。
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。
The results consists of atomic absorption spectrometry. Standard deviation 0.04, relative standard deviation 1.45%.
该方法的测定结果与原子吸收光谱法基本一致，标准偏差为0 04，相对标准偏差为1 45%。
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。
Around the world, time is now monitored by highly reliable atomic clocks that are coordinated to produce a universal time standard.
当今世界，时间在很大程度上是由提供宇宙同步时间的原子钟来监测。
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 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。
Abstract It was commented on significant figures of mole mass of Zinc Oxide and relative atomic weight in calibrating for EDTA standard volumetric solution in GB/T 601–2002.
标准滴定溶液的标定是其浓度的量值溯源，GB／T 601–2002［1］通过规定工作基准试剂摩尔质量的有效数字，减少因数字修约而引入的不确定度。
Many factors may create the deviauon of determination result for spark discharge atomic emission spectrometric analysis, such as type standard choice and processing method for test spcimen.
选择类型标样的不同、试样加工方法的不同，都可能造成直读光谱仪测定结果的偏差。
Many factors may create the deviauon of determination result for spark discharge atomic emission spectrometric analysis, such as type standard choice and processing method for test spcimen.
选择类型标样的不同、试样加工方法的不同，都可能造成直读光谱仪测定结果的偏差。
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