频率的例句大全

Test Method Based on the PC Sound Card to Test the Frequency of Electric Mains Precisely

基于PC声卡的电网电源频率精密测试方法

This produces a waveform of one polarity operating at a frequency twice that of the mains supply.

经过整流后得到的是一个频率为交流电源两倍的单极波形。

The positive DC corona streamer pulse amplitude and frequency under different pressure and humidity was measured, the results were in good agreement with the waveforms calculated by the fluid model.

为此，测量了不同气压和湿度下的正直流电晕流注脉冲幅值和脉冲重复频率，实验结果与利用流体模型计算得到的波形随气压和湿度的变化规律一致。

The waveform of corona current is pulse waveform with a high frequency.

气固两相体的电晕电流波形在正、负极性下均为高频率脉冲波形。

According to the procedure a plasmid DNA& pBR 322 and pAt 153 was obtained. The frequency of transformation of genetic markers of resistant antibiotics has been determined using E. Coli C_ ( 600) and HB 101 as the recipient cell respectively.

本文叙述了一种简便有效的纯化质粒DNA的方法，制得的质粒DNA&pBR322和pAt153分别以C600和HB101作为受体细胞进行转化，测定了对抗生素有抗性的遗传标记的转化频率。

Fixed frequency radar responder beacon

固定频率雷达应答标

Application of Digital Technique in Marine Agile Radar Beacon DIGITAL LIFE

数字技术在船用频率捷变雷达信标中的应用

The results showed that the equivalent stiffness curve of structure unit was an "elongated S" in frequency domain, while the damping property presented "bell-shaped curve".

仿真和实验结果表明，模式结构的等效刚度随振动频率变化曲线呈拉长的S形，而阻尼特性曲线呈钟形。

Analysis for stiffness on the bend vibration natural frequencies of a helicopter tail drive system

刚度对直升机尾传动系统弯曲振动固有频率影响的分析

The cut-off frequency of this filter can be controlled by dc biasing current, meanwhile, the low sensitivity characteristics of passive electrical network is also reserved.

截止频率可通过电流进行控制，同时保持了无源网络低灵敏度的特点。

In the verification, the proposed best linear unbiased estimator is utilized as the frequency synchronization algorithm.

在验证中，频率同步技术采用所提出的最佳线性无偏估计器。

Discussion on the safety criterion of blasting vibration considering the effect of vibration frequency

考虑振动频率的爆破振动安全标准的探讨

Combining with the optimality criterion method and the bi-factor algorithm, the inverse eigenvalue problem for optimal Parameters design of elastic mechanisms is solved effectively.

采用最优性准则方法，给合结构优化设计中的双因子算法，有效地解决了给定弹性机构某几阶固有频率时设计构件截面参数这类逆特征值问题。

This paper describes an optimality criterion for structural dynamic optimization which is subject to structural weight constraint, with the structural frequency as an objective function.

本文以结构频率作为目标函数，以结构重量作为约束，由极值条件推导出结构动力优化的最优准则；

To improve beamforming under low signal-to-noise ratio, a method based on stochastic resonance ( SR) in a bistable model is investigated by using a frequency scale transformation method.

为了改善低信噪比下波束形成的性能，从双稳态随机共振模型出发，提出了利用频率尺度变换，将随机共振和波束形成结合起来的算法。

On designing frequency blocking filter for PLC system

电力线载波系统频率阻塞滤波器原理和设计中的几个问题

The relations between the photolysis frequency and the dissociation threshold and between the bottleneck effect and the molecular structure have been discussed.

对瓶颈效应与分子结构之间的关系及解离阈值与激发频率之间的关系也作了简单的讨论。

This paper describes a method of suppressing correlation jamming at the frequency of reference signal which cannot be suppressed by lock-in amplifier and Boxcar integrator.

锁定放大器和取样积分器都不能抑制与参考信号同频率的干扰。本文提出了一种能抑制这种干扰的方法。

A new resonance frequency auto tracing technology for IGBT induction brazing power source

一种新型逆变式感应钎焊电源频率自动跟踪技术

In consideration of the effect of liquid dynamic pressure on the tubing string vertical vibration, the differential equation and frequency equation for describing the vibration are set up.

考虑液动压力对油管柱纵向振动的影响，建立了油管柱纵向振动微分方程，并给出了这种情况下油管柱纵向振动的频率方程。