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- Overview of the different kinds of time and frequency standards and measurement services that are available, through NIST, other NMIs, and the private sector. 概述目前可用的美国NIST、各国国家计量院和私有的各种时间频率标准、测量设备。
- Description of some of the expected future developments in time and frequency standards and distribution, including such topics as chip-scale atomic clocks (size of a rice grain, powered by AA battery, potentially capable of low cost mass production). 介绍一些未来可预期的时间频率标准和发布技术的进展,包括诸如“芯片级的原子钟”(大米粒尺寸,由AA电池供电,具有低成本大批量生产潜力)。
- Specify the time and frequency with which to compile audiences. 指定搜集访问者所使用的时间和频率。
- time and frequency standards 时间和频率基准
- time and frequency standard 时间和频率标准
- The National Institute of Standards and Technology (NIST) maintains a network of time servers that provide time and frequency services for the United States. National Institute of Standards and Technology(NIST)维护着一个时间服务器网络,这些时间服务器为美国提供时间和频率服务。
- A more in-depth discussion of commercially available time and frequency measurement equipment and standards, and how such instrumentation can be used in the metrology laboratory. 市场上可用的时间频率测量设备和标准的更深入的讨论,以及此类仪器如何应用在计量实验室。
- Time and frequency metrology is unique in that standards and measurements can be shared globally through various broadcasts: Radio broadcasts, GPS, Internet, etc. 时间频率计量学是非常独特的:利用各种广播技术,诸如无线电广播、GPS和以太网,可以在全球范围共享标准和计量。
- From the radio spectrum of Weissenau in Germany, we found a corresponding burst on time and frequency. 在德国Weissenau的太阳射电频谱记录上找到了对应的爆发;
- Cursors give quick readouts of voltage,time and frequency with an accurancy of 1/32 div. 系统可以明显地提高示波器的读出性能:快速给出电压、时间和频率的测量值,读出精度达1/32DIV。
- How to decrease anesthesin time and frequency is a important problem to be considered. 减少换药次数及住院天数是一个重要问题。
- The decorrelation caused by the time and frequency synchronization errors is presented for the first time. 基于该误差模型,分析了时间和频率同步误差对干涉相位的影响,首次推导了同步误差导致的信号去相关。
- Traditionally, the SISO channel is described by the statistics along two dimensions: time and frequency. 传统上,单一输入单一输出的通道可以被两个维度的统计特性所描述,即时域和频域;
- It realizes graphics protraction of time and frequency domain in every time period. 它实现了各个信号的时域和频域的图形的绘制。
- Learning a language require time and effort. 学习一种语言是需要时间和精力的。
- As a new study, Wavelet analysis is called "the digital microscope" and applied well in time and frequency field. 小波分析是一门新兴学科,被称为“数字显微镜”,它在时频两域具有良好的局部特性。
- You must make sure of the time and place. 你必须把时间和地点弄清楚。
- Don't waste your time and energy on trifles. 别把你的时间和精力浪费在琐事上。
- The novel hybrid MC/MC-DS CDMA structure, which exploits joint time and frequency domain spreading, is constructed in each subband. 在本文中,我们建构一种混合多载波/多载波-直序展频之分码多工系统于每一子频带中,此系统除了利用时域展频之外也用了频域展频。
- Shall we meet at the usual time and place? 我们在老地方老时间见面好吗?