Radio Frequency Identification

Based on non-contact vibration measuring technique of blade tip-timing, "5 + 2" scheme of doublesam-pling rates is adoped to solve the under-sampling problem of asynchronous blade vibration, and by using frequency identification , blade s real vibration can be picked up.

基于非接觸式葉尖定時測振原理,針對葉片異步振動的欠采樣問題,采用"5+2"雙采樣速率方案進行采樣,通過頻率辨識技術來獲得葉片的真實振動。

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.

介紹目前應用廣泛的兩種發電機定子絕緣在線監測手段,結合國華臺電3~4號發電機故障的分析以及對安裝在發電機內部的兩種在線監測裝置的監測數據的比較,對無線電頻率在線監測和局放在線監測兩種手段的有效性進行了綜合評價。

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

本文簡要介紹了美國、歐盟和我國的頻率規劃現狀,分析了目前我國在無線電頻率使用的過程中存在的主要問題,并提出了一些相關建議。

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:無線電頻率是用于治療皮膚皺褶和病損的一種方法,但是它又可以導致表皮的侵蝕性損傷,本研究的目的是觀察膠原酶膏劑在這種皮膚損傷后的修復中的作用。

radio frequency emission testing

無線電頻率放射測試

international distress radio frequency

國際呼救無線電頻率

a radio-frequency amplifier.

一種無線電頻率放大器。

public safety radio frequency

公共安全無線電頻率

distress frequency

無線電頻率遇險呼救頻率

very high frequency(abbr. VHF) radio frequency of 30 to 300 megahertz

甚高頻（30到300兆赫的無線電頻率）.

or 1420 megacycles per second.

即秒1420兆周的精確無線電頻率。

picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources.

從外陸來源的無線電頻率范圍內接受電磁射線。

The medium used for the transmission of radio and television signals.Often used in the plural.

波段，無線電頻率傳送無線電和電視信號的媒介。常用復數

combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two.

把一種無線電頻率和當地不同的另一種頻率混合的一起。

To provide frequencies for the Olympic Games, we will strengthen the overall planning and management of radio frequencies.

加強無線電頻率的統籌規劃，為奧運會做好頻率準備；

The inappropriate frequency configuration in subway often generates the problem of radio frequency interference.

提出了地鐵中由于頻率配置不當產生無線電頻率干擾問題。

frequency tolerance of radio transmitter

無線電發射機頻率容限

marine frequency

海上無線電通信頻率

An electronic device that converts one frequency of a radio signal to another.

變頻器將無線電訊號從一種頻率轉換成另一種頻率的電子裝置

He tuned his radio to the police frequency.

他把無線電調到警方的頻率。

This radio signal has a frequency of200,000 cycles per second.

這個無線電信號的頻率是每秒200,000周期。

ultra-high-frequency radio system

特高頻率無線電通信系統