In astronomy, in optical astronomy, we cannot measure the period or the frequency of optical light.
在天文学中，在光学天文学中，我们不能测量周期或者可见光的频率。
Electrons are vibrating, and they are vibrating with a certain frequency, and that means there is a certain period of one oscillation.
垫子在震动，它们以某一频率，进行震动，这意味着,存在某一震动周期。
And another way 1 we can say period is just 1 over nu or 1 over the frequency So, now we know both the distance traveled and the time the elapsed.
周期，对的，它需要一个周期的时间，另一种说法是周期是，除以nu，也就是1除以频率，现在我们同时知道了。
So if now I hang on it a mass of one kilogram, I can calculate the period of one oscillation, and one over the period F is the frequency F, and I believe that is something like 38 hertz.
如果在上面,悬挂1公斤物质，我能够计算出,振荡的周期，1除以周期,等于频率，我相信,等于大概38赫兹。
It will become a trend to shorten the period of teaching and practice, speed up the frequency of teaching and practice and ensure practice throughout the whole process of learning.
缩短学习与实践的周期，加快学习与实践的频率，将实践贯穿于学习过程始终成为今后音乐教育实习的趋势。
For fixed damping and fixed excited frequency the motion of the beam under small amplitude of force is periodic, but becomes chaotic through period doubling bifurcation with increase of the force.
对固定的参数激励频率和阻尼，当参数激励幅值较小时梁的运动是周期的，但大幅值激励会使运动通过倍周期分岔变为混沌。
Applying period frequency spectrum method to analysis of digital seismic recording is discussed in this parer.
论述了周期-频度谱方法在分析数字化地震记录中的应用。
Shops have closed with increasing frequency during the period.
在这段时期里已有越来越多的商店歇业。
The seismicity or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.
地震或地震活动面积是指频率、类型及大小的地震经验丰富的经过一段时间的。
In astronomy, in optical astronomy we cannot measure the period or the frequency of optical light.
在天文学中，在光学天文学中我们，不能测量周期或者，可见光的频率。
Sampling point number of every pulse cycle, instantaneous pulse frequency and period was gained with program operation.
经程序运算得到每个脉冲周期的采样点数，瞬时脉冲频率和周期。
With the increasing of the period, microwave frequency decreases.
随着周期的增大，微波频率降低。
This article mainly addresses the maintenance period of clock frequency of SPC exchanges in China's telecommunication network.
本文主要讨论我国电信网中程控交换局时钟频率维护周期的确定问题。
The hydrologic design values of specific design return period or frequency are random variables having certain distribution pattern, so there are some uncertainty in it.
指定设计重现期或频率的水文设计值为随机变数，有一定的分布规律，表明它有相应的不确定性。
Through observation on shock wave and multiple pulsating caused by underwater blasting, the velocity, period, frequency and energy of shock wave and multiple pulsating are analysed.
通过水中爆炸水击波及其多次脉动的观测，分析了水击波及其多次脉动的传播速度、脉动周期、频率及能量分布等特性。
The acoustooptic interaction in biconical optical fiber was analyzed based on coupled mode theory, and the relationship between perturbation period and flexural wave frequency was discussed.
利用耦合模理论分析了在双锥光纤耦合区中声光的相互作用，讨论了在不同耦合区半径下扰动周期与声波频率的关系。
Current frequency and scope in limiting electricity period were put forward.
提出了限电时期的升降电流频率及幅度。
Flood frequency (return period) is referring to recurrence probability of flood in certain period.
洪水频率(或重现期)是指一定时期内某种洪水出现的机率。
Standard work period frequency annualization factor.
标准工作期间频率年计系数。
As compared with the conversational breeding, spaceflight mutation breeding is of high mutagenesis frequency, wide variation extent, short breeding period and more elite mutants, etc.
与常规育种相比，航天诱变育种具有诱变频率高、变异幅度大、育种周期短、有利突变体多等特点。
After discussing the conceptions of power system average frequency and power system oscillation period.
探讨了系统平均视在频率及振荡频率的概念。
Two key questions, selection of sampling period and phenomenon of frequency aberrance, must be considered when the continuous notch filter is discretized.
本文讨论了离散化时需重点考虑的两个问题：采样周期的选取和频率畸变。
It is traditional to use frequency tracking to realize integer period sampling.
传统的解决方法是采用频率跟踪技术实现采样的整周期性。
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。
Results: with this method, the drug stocks can be controlled within 7 days during the purchasing period, accelerating the hospital's capital turnover, lessening the frequency of purchases.
结果：本法有效地把采购间隔期内的药品库存量控制在7天库存量内，加速医院资金周转，减少购药频率。
When the extrusion temperature was increased, the pressure vibration frequency and critical slid length decreased, while the vibration period increased.
挤出温度升高，压力振荡频率减小，周期变大，外推滑移长度有变小趋势。
The frequency in the response spectrum where the zero period acceleration asymptote begins.
频率响应谱中的零期渐近开始加速。
The frequency of extreme drought in the dry period is much higher than that in the wet period.
在气候处于少雨时期，极端干旱频率远高于多雨时期。
The frequency of extreme drought in the dry period is much higher than that in the wet period.
在气候处于少雨时期，极端干旱频率远高于多雨时期。
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