RFA Radio Frequency Attenuator

The results show that when the content of SiC is in the range from 1%(mass fraction,the same below) to 10%,the attenuation frequency of lossy resonance(f0) shifts to a low frequency as the effective attenuation bandwidth grows,and this effect is stronger when the content of SiC is less than 2%.

结果表明:当SiC质量分数(下同)从1%到10%逐渐增加时,复相材料的损耗谐振衰减频率(f0)随之降低,衰减量也逐渐减小,有效衰减带宽增大;这种现象在SiC含量小于2%时更显著。

as well as the monitoring data comparison from the two kinds of online monitoring devices installed inside the generators,the effectiveness of the two moniforing methods,the radio frequency online monitoring method and the partial discharge online monitoring method,was comprehensively evaluated.

介绍目前应用广泛的两种发电机定子绝缘在线监测手段,结合国华台电3~4号发电机故障的分析以及对安装在发电机内部的两种在线监测装置的监测数据的比较,对无线电频率在线监测和局放在线监测两种手段的有效性进行了综合评价。

Then some key problems of using radio frequency existing in our country are analyzed.

本文简要介绍了美国、欧盟和我国的频率规划现状,分析了目前我国在无线电频率使用的过程中存在的主要问题,并提出了一些相关建议。

The purpose of this study was to evaluate the effect of collagenase ointment on the epithelial healing of an abrasive wound induced by a radiofrequency system.

目的:无线电频率是用于治疗皮肤皱褶和病损的一种方法,但是它又可以导致表皮的侵蚀性损伤,本研究的目的是观察胶原酶膏剂在这种皮肤损伤后的修复中的作用。

Frequency attenuation for gas potential prediction of the volcanic reservoirs in Qingshen gas field

用频率衰减属性预测庆深气田火山岩储层含气性

dependency of attenuation on frequency

衰减对频率的从属性

The attenuation coefficient decreases with increasing of frequency and the gas density.

衰减系数随频率增加而减小,并且随密度增加而减小.

Ground roll wave has characteristics of strong energy, low frequency and slow attenuation.

面波具有能量强、频率低、吸收衰减缓慢等特点。

Study of Characteristic of Electromagnetic Wave Attenuation in Frequency Domain in Coal-Rock Medium;

煤岩介质电磁波衰减特性的频率域研究

Adaptive Receiver for Multirate CDMA Systems on Frequency-selective Fading Channel;

频率选择性衰减信道下的多速率CDMA自适应接收机

The rolloff is usually expressed as attenuation per unit interval, such as6 dB per octave.

衰减截止频率通常被表示为单位音程的衰减，比如每一个八度降低6分贝。

video attenuator switch

视频信号衰减器开关

Test methods for communication cable--Test for frequency characteristic of attenuation coefficient of coaxial pair--Comparison method

GB/T5441.8-1985通信电缆试验方法同轴对衰减常数频率特性试验比较法

Study of Attenuation and Depolarization in Ka Waves Band Along Earth-space Path and Power Control Algorithm;

Ka频段地空路径衰减与去极化及功率控制算法研究

A Study on the Relations of the Surface Attenuation with the Surface Velocity and Seismic Signal Frequency

表层吸收衰减与表层速度及地震信号频率关系研究

In the stopband of an LPF with a6 dB/ octave slope, for example, every time the frequency doubles, the amount of attenuation increases by6 dB.

例如，在低通滤波器的抑止频带，八度音程（分贝）率表示频率每翻一倍，衰减量就降6分贝。

average logarithmic energy decrement

平均对数能量衰减率

under frequency load shedding

低频率自动负载减少

Of an electronic circuit or device ; having an output proportional to input ; amplifying or attenuating all frequencies equally.

说明一种电子电路或器件,其输出和输入成比例,对所有的频率都放大或衰减同样的倍数。

Handheld microphones usually have their low frequencies intentionally rolled-off.

手持话筒通常有意的做低频衰减。

Test method of attenuation stability for radio-frequency cables

GB/T4098.6-1983射频电缆衰减稳定性试验方法

Methods of measurement of attenuation constant for radio-frequency cables

GB/T4098.4-1983射频电缆衰减常数测量方法