Second , introduce the dyadic wavelet analysis , and use it realized the signal monitor and analysis to the turbine compressor , obtained the detail signal and approach signal at different frequency parts of the compressor s original signal . one type of electromotor that made in china is choose , and it s noise is tested . the noise signal is analyzed by wavelet analysis and spectrum analysis . several high spectral peaks that make people hearing disameniry are found . by contrast with theory calculating results and farther analysis . the cause that producing these spectral peaks is located 其次,介紹了二進(jìn)小波分析,并應(yīng)用二進(jìn)小波分析實現(xiàn)了對透平壓縮機(jī)信號的監(jiān)測分析,得到了壓縮機(jī)原始信號在不同頻率段分解的細(xì)節(jié)信號和逼近信號。用小波分析和譜分析相結(jié)合的方法對某國產(chǎn)電機(jī)的噪聲進(jìn)行了分析,找出了人的聽閾不閱的幾個高譜峰位置,進(jìn)行了空氣動力噪聲計算,通過與理論計算結(jié)果進(jìn)行對比分析,進(jìn)一步找出了產(chǎn)生該頻閩譜峰的幾個原因,第三,介紹了諧波小波和分形的基本原理。
There are a lot of ways to realize the alarm when the train approach , and sound alarm is used in this device , when the sensor receives the train - approaching signal , the controller will analyze and handle the signal of coming train by the direction of coming train , and make an alarm signal of up or down traveling train approaching 列車接近報警的實現(xiàn)有很多方法,本儀器采用聲報警器的工作方式,傳感器接受到列車接近信號,控制器對來車信號進(jìn)行分析處理,并按來車方向,通過聲報警裝置發(fā)出上行或下行列車接近報警信號。
approach: vt. 1.向…接近,走近;使接近。 2.探討;看待,對 ...signal: n. 1.信號,暗號;信號器。 2.動機(jī),導(dǎo)火線 (fo ...approach obstruction signal: 遮斷預(yù)告信號機(jī)approach slow signal: 低速接近號志signal approach control circuit: 信號接近控制電路signal processing approach to simulation: 模擬信號處理法approach: vt. 1.向…接近,走近;使接近。 2.探討;看待,對待,處理。 3.向…接洽[提議]。 4.〔美國〕企圖收買。 approach one's home 快到家。 approach completion 將近完成。 It is wrong to approach a problem from a metaphysical point of view. 用形而上學(xué)的觀點來看待問題是錯誤的。 approach Shakespeare as a poet 詩才堪與莎士比亞相比擬。 approach the manager with a suggestion 向經(jīng)理提出建議。 approach the manager on a business 為一項事務(wù)與經(jīng)理接洽。 approach a government officer 企圖向政府官員行賄。 vi. 臨近,靠近,近似。 Winter approaches. 冬天快到了。 n. 1.走近,接近,逼近。 2.近似,類似。 3.進(jìn)路,入口;門徑,接近[處理]的方法,手段。 4.探索,探討。 5.看法,觀點。 6.〔pl.〕親近;打交道。 7.【軍事】(為逼近敵方工事而挖的)戰(zhàn)壕。 8.【航空】進(jìn)場(飛行),進(jìn)入(投彈點)。 9.【軍事】戰(zhàn)斗前進(jìn)。 10.〔pl.〕 提議,建議。 the best approach to study a foreign language 學(xué)習(xí)外國語的最佳方法。 the blind approach 【航空】盲目(按儀表)進(jìn)場。 the instrument approach 【航空】按儀表進(jìn)場。 a scientific approach 科學(xué)態(tài)度。 his nearest approach to a smile 他的似笑非笑的笑容。 an approach to the bridge 橋畔,引橋。 the approach to the village 到村莊去的路。 make approaches to (sb.) 同(某人)親近;和(某人)打交道。 approach of: 駛近approach to: 接近;幾乎等于; 接近;近似,約等于; 接近;約等于; 接近于; 類似,辦法,通道; 駛近; 通往...的方法;接近at the approach of: 在快到的時候; 在…將到的時候on the approach: 在進(jìn)場中the approach: 降落機(jī)場前the approach of: 在快到的時候with the approach of: 隨著….的臨近approach approach: 一再鍛煉的人if signal: 中頻信號no signal: 無信號on signal: 開通信號; 啟動信號signal: n. 1.信號,暗號;信號器。 2.動機(jī),導(dǎo)火線 (for)。 3.預(yù)兆,征象。 call signal 【無線電】呼號。 an alarm signal 警報(器)。 an information signal 〔美國〕暴風(fēng)警報(旗)。 an international code of signals 國際通用信號。 a signal of distress =a distress signal 船只失事信號。 adj. 1.暗號的,作信號用的。 2.顯著的,非常的,優(yōu)越的。 a signal victory [defeat] 大勝[敗]。 vt.,vi. (〔英國〕 -ll-) 發(fā)信號[警報]給(人、船等);用信號[警報]通知(暴風(fēng)、危險等);用動作[手勢]示意;預(yù)示。 a signaling bomb 信號彈。 the signal: 詭信號approach bridge, approach span: 引橋approach-approach conflict: 各衡突; 趨沖突; 雙趨型矛盾bridge approach; approach bridge: 引橋a approach lighting: 進(jìn)近燈a metaphysical approach: 形而上學(xué)地看問題
approach signal meaning:[Civil engineering] A railway signal warning an engineer of a signal ahead that displays a restrictive indication.approach signal перевод:ж.-д. сигнал предупредительный