频率

We stabilized the laser frequency on Rubidium absorption spectroscopy, and the residual frequency fluctuation is 3.5 MHz in 30 s.

我们还将激光器的频率锁定于Rb原子的吸收线上，30s内剩余频率起伏约为3.5 MHz。

In the Rubidium frequency standard, It is necessary to generate a fractional frequency signal. So DDS is optimal candidate.

在铷原子频标中，需要产生带有小数频率的微波信号，DDS逐渐成为实现该频率的最佳手段。

Trends of DNA methylation frequency and half DNA methylation frequency are ruleless under soil Naphthalin pollution stress in corn whole growth stage.

从玉米整个生长周期看，土壤萘污染胁迫对玉米叶片中DNA全甲级化和半甲基化频率影响均无明显规律；三个时期分别来看，土壤萘污染胁迫对玉米幼苗期和灌浆期DNA全甲级化和半甲基化频率影响较大。

Firstly,using the method of concentrate mass this paper establish a non-linear dynamics model of a two-stage gear train with backlashe between the gear pair,and through analysed the dynamics model,the torsional motion differential equations are got , on this basis,then calculate the torsional motion differential equations using Runge—Kutta method ,and discuss how to influence the dynamics characteristic of system when these parameters chage such as mesh frequentcies、 stiffness of the intermediate shaft、the ration of mesh frequentcies.and discuss when the chaos will happen under the change of these parameters.

首先用集中质量法建立系统的含间隙的非线性动力学模型，并根据牛顿力学定理，得到系统的运动微分方程。然后对所建立的运动微分方程运用四阶变步长Runge—Kutta方法进行了求解，并对计算结果进行分析，研究了齿轮啮合频率、中间联接轴的刚度，一、二级齿轮的啮合频率比等参数变化时，对系统非线性动力学特性的影响规律，并讨论了当参数如何变化时会导致系统的混沌响应的出现。

And then we demarcated the saltation time and starting time of this travelling wave respectively by the first kind of cubic B-spline wavelet and the second kind of cubic B-spline wavelet.

由于行波各频率分量在线路中的传播速度是不同的，而我们所检测到的行波浪涌并非行波的最高频率分量，所以必须选取与所检测到的行波浪涌相吻合的波速。

This article introduces the frequency sampling method.

本文主要介绍了频率抽样法，频率抽。。。

Classifier system is used to simulate learning behavior of agent, and differing from the design of Marimon,McGrattan and Sargent(1990), we give every agent a classifier system in order to separate the direct and indirect communications of agents.

此外，我们的实验显示了与稳态均衡频率相同的商品0和商品1作为交换媒介服务的频率，代币商品商品0的可接受性对于商品0的供应不太敏感，具有内在价值的商品1的承兑性会随商品0供应的增加而减少。

WT5BZThe paper described the principle of holographic scanning disk .

介绍了全息扫描镜的原理，给出了等空间频率分布及变空间频率分布的全息扫描镜结构。

The algorithms estimate the DOA of the broadband distributed source fron the secondary diagonal elements of the covariance matrices generated from every frequency domain of the received broadband signal s, thus avoiding unwrapping of phases.

该类算法首先将阵列接收的宽带信号变换到频率域，然后对于每个频率形成阵列接收信号协方差阵，最后由该协方差阵的次对角线元素估计宽带分布源的到达角，其主要特点是避免了相位展开。

Generally, frequency characteristic of seismometer is obtained by measuring data, but the measuring data is disturbed by noise.

通过测试信号及其响应分析得到的一般是系统的频率特性，并且该频率特性受到噪声的污染。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。