查询词典 frequencies

The F layer is of most importance for HF communications as it is present during day and night, it is located at the greatest height, and it reflects the highest frequencies in the HF band.

F 层数是多数重要为HF 通信照原样存在在日夜期间，它位于在最了不起的高度，并且它反射最高的频率在HF 带。

In the end, the main content of this dissertation is addressed.In chapter 2, based on the analysis of present vibrators principle and structure, two kinds of transfer functions and frequency response curves of the vibrator, driven by voltage feedback power amplifier and current feedback amplifier, are given separately. And turnover frequencies between different frequency rangs are also given.

第二章分析了标准振动台的工作原理和结构，在此基础上，建立了标准振动台的机械和电气方程，给出了恒压源和恒流源功放激励下的振动台传递函数及幅频、相频特性曲线，列出了不同频段间的转折频率。

In fact, felid purring produces a mix of frequencies that have been individually proven to improve healing time, strengthen muscles and even aid joint mobility.

事实上，猫科动物发出咕噜咕噜的喉音，是由好几种已经被证实是能够自我疗养、加固肌肉、甚至提高关节机动性的频率相互混合而成的！

Compared with ears treated by oral stapedectomy with original stapes, ears treated by small fenestra stapedotomy and stapes mobilization or elevation, more decreased air-bone gap and lower rates of post-operative sensorineural hearing loss and dizziness at high frequencies were found.

3种术式在提高耳硬化症患者的听力方面均具有较好的疗效，其中以足板小孔开窗术疗效最佳，其次是镫骨撼动或提高术，并且在减少术后并发症方面均优于镫骨全切除术。

In conventional ultrasound imaging system, the design of dynamic filter needs the center frequency of the near field and far field first, which were calculated using the linear sound field model. Then the frequencies are used to determine the factors of the dynamic filter for every section of the echo.

在传统超声成像的动态滤波器设计中，需首先按线性声场模型计算出近场及远场回波的中心频率，据此确定出动态滤波器在接收过程中各段的滤波器系数。

In fact, the first-generation analog phones that rely on different frequencies to distinguish different users of different mobile phones.

事实上，第一代模拟手机就是靠频率的不同来区别不同用户的不同手机。

A complete sample of the luminaire is mounted by its normal fixings to a rigid test figure ,and exposed to frequencies between 1Hz and 100Hz.

一个完整的灯具样本的安装是通过它在正常的装备时在严格的测试数据，并暴露频率在1赫兹和100赫兹之间。

Could the slight differences in focal distance created by corneal irregularities actually aid the eye in seeing a variety of light frequencies?

角膜的不规则缺陷导致的焦距差异，搞不好反而协助眼睛看见许多不同的光频。

And the predominant frequencies of the eastern part of western plain and the western foothill are higher than 3.0Hz.

台湾西部平原之主频分布趋势，主要呈东西向的变化。

If the excitation frequency is close to one of the natural frequencies of the bridge, further analysis is required to determine the dynamic amplification in what is known as a 'forced vibration' analysis.

如果激励频率接近一个自然频率的桥梁，进一步分析必须确定动态扩增什么是所谓的'强迫振动分析。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。