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(shí)測(cè)振原理,針對(duì)葉片異步振動(dòng)的欠采樣問(wèn)題,采用"5+2"雙采樣速率方案進(jìn)行采樣,通過(guò)頻率辨識(shí)技術(shù)來(lái)獲得葉片的真實(shí)振動(dòng)。
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(yīng)用廣泛的兩種發(fā)電機(jī)定子絕緣在線監(jiān)測(cè)手段,結(jié)合國(guó)華臺(tái)電3~4號(hào)發(fā)電機(jī)故障的分析以及對(duì)安裝在發(fā)電機(jī)內(nèi)部的兩種在線監(jiān)測(cè)裝置的監(jiān)測(cè)數(shù)據(jù)的比較,對(duì)無(wú)線電頻率在線監(jiān)測(cè)和局放在線監(jiān)測(cè)兩種手段的有效性進(jìn)行了綜合評(píng)價(jià)。
Then some key problems of using radio frequency existing in our country are analyzed.
本文簡(jiǎn)要介紹了美國(guó)、歐盟和我國(guó)的頻率規(guī)劃現(xiàn)狀,分析了目前我國(guó)在無(wú)線電頻率使用的過(guò)程中存在的主要問(wèn)題,并提出了一些相關(guān)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(wú)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(dǎo)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(fù)中的作用。
radio frequency emission testing
無(wú)線電頻率放射測(cè)試
international distress radio frequency
國(guó)際呼救無(wú)線電頻率
a radio-frequency amplifier.
一種無(wú)線電頻率放大器。
public safety radio frequency
公共安全無(wú)線電頻率
distress frequency
無(wú)線電頻率遇險(xiǎn)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(wú)線電頻率）.
or 1420 megacycles per second.
即秒1420兆周的精確無(wú)線電頻率。
picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources.
從外陸來(lái)源的無(wú)線電頻率范圍內(nèi)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(wú)線電頻率傳送無(wú)線電和電視信號(hào)的媒介。常用復(fù)數(shù)
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(wú)線電頻率和當(dāng)?shù)夭煌牧硪环N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(qiáng)無(wú)線電頻率的統(tǒng)籌規(guī)劃，為奧運(yùn)會(huì)做好頻率準(zhǔn)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(dāng)產(chǎn)生無(wú)線電頻率干擾問(wèn)題。
frequency tolerance of radio transmitter
無(wú)線電發(fā)射機(jī)頻率容限
marine frequency
海上無(wú)線電通信頻率
An electronic device that converts one frequency of a radio signal to another.
變頻器將無(wú)線電訊號(hào)從一種頻率轉(zhuǎn)換成另一種頻率的電子裝置
He tuned his radio to the police frequency.
他把無(wú)線電調(diào)到警方的頻率。
This radio signal has a frequency of200,000 cycles per second.
這個(gè)無(wú)線電信號(hào)的頻率是每秒200,000周期。
ultra-high-frequency radio system
特高頻率無(wú)線電通信系統(tǒng)