reference frequency

A counter with timing fiducial oscillator acts as a frequency multiplier, and the count value in the prior period is taken as the reference for the current period to give the decimal part of a signal period.

该方法利用带基准时基的数字计数器实现周期内线性细分，当前周期信号将前一整周期的倍频数作为参考构成信号周期的小数部分。

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Notes on net flux in fluctuated process in view of frequency with special reference to the suspended sediment transport

从频域分析波动输运过程的时均通量

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Cs atomic fountain clock is the reappearance of "seconds" definition of time and frequency standard device, has the highest accuracy, as a reference clock calibration with other atomic clock, is a time and frequency system based.

Cs原子喷泉钟是目前复现秒定义时间频率基准装置，具有最高的准确度，作为基准钟标校其他原子钟，是一个国家时间频率系统的基础。

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Roberts gradient processing is carried out for the input image of joint transform correlator, and at the same time phase shift technique is applied to the reference image and binaryzation is implemented in power spectrum in the frequency domain.

我们对联合变换相关器的输入图象进行Roberts梯度处理，同时对参考图象采取相移技术，并在频域中将功率谱二值化。

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In this curve, the point which had the largest inclined rate was a timing reference point of low frequency time-code receiver.

该曲线的斜率最大点即为低频时码接收机的秒定时参考点。

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We also describe the basic principle and realization of optical clock, and believe that optical frequency standard will become new generation time frequency reference.

详细描述了光钟的原理与系统构成，并对光学频率标准与光钟的应用前景进行了展望。

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These signals provide an important reference of the gain of antenna, the time reference, the phase reference and the frequency of carrier wave for generating stimulant echo signal.

这些信号分别为模拟回波信号的生成提供了天线增益大小、时间基准、相位基准和载波频率大小等重要的参考信息。

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At low frequency, this equation can be simplified to the stereo law of sines, but as the frequency increases the sound image position has reference to frequency.

新的公式在低频时将简化为通常的正弦定理，而随着声音频率的增加，声像位置将与声音的频率有关。

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Based on the analysis, a frequency and phase stabilized two-phase sinusoidal power clock generator is proposed, which, while connected to an external reference clock, makes the oscillating circuit in synchronization with the reference clock.

在此基础上，提出了稳定功率时钟频率与相位的功率时钟产生电路，即接入外部参考时钟，使振荡电路与参考时钟同步。

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The reference vector corresponding to basic vector and its role time under linear modulation mode is decided. As well as redundant switches are optimization selected by extreme value method to reduce the switching frequency.

确定了线性调制模式下参考矢量所对应的基本矢量及其作用时间；并提出了极值法对冗余开关状态进行优化选择以降低开关频率。

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