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- Comparison of Two Variances in the Long Time Frequency Stability Measurement of Rb Atomic Frequency Standard 两种方差在铷原子频标长稳测量中的比较分析
- Application of Adamard Variance in the Long Time Frequency Stability Measurement of Rb Atomic Frequency Standard 哈达玛方差在铷原子频标长稳测量中的应用
- The atomic hydrogen maser is the most stable frequency standard generally available today for all but the shortest measuring time interval. 氢脉泽是一种中、长期稳定度最高的原子频率标准。
- The hydrogen maser is the generally available frequency standard with the smallest frequency instability for all but the shortest measuring time interval. 为了提供高精密的时间频率,人类已经研制出氢原子钟,除长期稳定度之外,它的各项性能都是十分优秀的。
- It is possible that the computer is of low grade, and the time frequency is too low, please change for a new computer. 有可能是主机档次太低,时钟频率过低,请更换主机。
- The uncertainty of the Cs Atomic Frequency Standard System is evaluated as well as the result of measurement of a nanosecond universal counter. 对铯原子频率标准装置不确定度和纳秒通用计数器测量结果的不确定度进行评定。
- This paper proposes a new method based on time frequency analysis to detect spikes automatically. 本研究提出了一种基于时频分析的癫痫脑电棘波检测方法。
- Frequency synthersizer is one of the important part of the passive small type Rb frequency standard. 频率综合器是被动式小型铷原子频标的关键部件之一。
- Indicated the good result of the long-term operation of the optically pumped cesium beam frequency standard in China. 强调了中国光抽运铯原子束频标经过长期连续工作所取得的优秀成果。
- Secondly, to the nonstationarity of diesel engine noise, this paper focuses on the extraction of time frequency feature using wavelet scalogram. 其次针对噪声信号的非平稳性，研究基于小波尺度谱噪声分量的时频特征分析。
- Recently, laser frequency standards have developed rapidly. 近年来，激光频标得到了迅速发展。
- Meanwhile, we take some improvement measure in order to improve the stability about rubidium atomic frequency standard. 同时通过定量分析对电路实现提出了一系列优选方案，从而使铷原子频标的性能得到改善。
- M. Akay, "Time Frequency and Wavelets in Biomedical Signal Processing," Endorsed by IEEE Engineering in Medicine and Biology Society, pp.211-420, 1998. 翁国正，“应用小波系数临界法于消除助听器背景噪音之技术”，国立成功大学电机工程学系硕士论文，民国九十二年。
- Taking Time Frequency Distribution (TFD) of the radar signal as an image, the method uses image processing algorithm for extracting its singular value. 该方法把雷达信号的时频分布作为一幅图像进行处理，利用图像处理算法提取其奇异值特征。
- As planetary healers, we must become aware of the galactic time frequency and learn how to use the natural harmonics of time to our advantage. 身为行星的治疗者，我们必须意识星际时间频率，学习如何使用自然和谐的时间，成为我们的优势。
- The impurity that was produc ed in aging process was analyzed.The results were benefit to the research of rubidium frequency standard. 对老化过程中产生的杂质进行了分析,从而对铷频标研究提供参考依据。
- It shows that since 1999 the seismic activity mainly belongs to the tectonic event based on a seismic spectral and time frequency analysis. 火山地震的频谱分析和时频分析结果表明，自1999年以来发生的火山地震主要为构造型火山地震。
- 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XSR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 short stability of the miniature Rubidium vapor cell frequency standard is measured to be superior to the same pattern products internaitional. 在小型化的条件下，整机短期频率稳定度达到了国际同类产品水平。
- 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。
