time signal standard frequency 中文意思是什麼

time signal standard frequency 解釋
時間信號標準頻率
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  • standard : n 1 標準，水準，規格，模範。2 旗；軍旗，隊旗；【徽章】標幟，標記；旗標，象徵。3 【植物；植物學】...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. Standard frequency and time signal - satellite service

    衛星標準頻時信號業務
  2. We illustrate the wavelet package analysis that can obtain the time - frequency distribution figure of noise signal, which can be used to define gray - image. through image - average, we can get the standard time - frequency distribution images of different main bearing gap. based on that, a main bearing wear fault diagnosis model using image matching is set up

    然後對圖像進行平均，得到主軸承在不同間隙狀態下的「標準」時頻分布圖，建立了柴油機主軸承間隙圖像匹配的故障診斷模型，匹配時所用的參數為兩幅圖像之間的歐氏距離。
  3. Intelligent counter digital frequency rotating speed line velocity display control transmit instruments are all adopt used advanced microprocessor for smart control. input is pulsed quantity or contect switch quantity signal, after cpu operation processing, count, rotating speed or line velocity will be clearly intuitional indicated by high brightness led numeral tube, at the same time, these signals can be changed into standard voltage current signal to transmit output. and have the functions of super - limited alarm, standard serial communication function

    簡易后備操作器接收從dcs系統或pid調節器給定的模擬量信號，正常控制時，操作器輸入輸出相當于直通的，以實現dcs系統或pid調節器對執行機構的自動控制，當前級dcs系統或pid調節器發生故障時，操作器接收到故障狀態信號，即轉為手動控制狀態，由按鍵控制操作信號的輸出，當故障解除，儀表自動恢復自動狀態。
  4. Secondly, basing on the theory of on - off gain of small signal, the raman gain coefficient for frequency shift between 0. 5 and 20 thz of standard sigle mode optical fiber is measured by pump - probe method through a super luminescent diode ( sld ) as a broadband small signal probe source. thirdly, numerical simulation analysis of gain characteristic of raman fiber amplifier for c band wdm signal light is made according to the raman gain coefficient of the fiber measured before through target and four rank runge - kutta method. at the invariability of wavelength and maximum power of each of two pumps, schematic of powers of two pumps for best flatness on c band wdm optical gain was found out, at the same time, the factors of resulting in gain saturation is analyzed, too

    本文首先應用經典的電磁理論對拉曼光纖放大器的工作機制進行了分析，然後，根據小信號理論推導出的開關增益求出了光纖拉曼增益系數的表達式，採用泵浦-探測波的方法，利用超輻射激光二極體（ superluminescentdiode簡稱sld ）作為探測光源，測量了所用標準單模光纖頻移為0 . 5 - 20thz的拉曼增益系數，之後根據所測得的光纖的拉曼增益系數譜對應用該類光纖構成的放大c波段wdm光信號的拉曼光纖放大器的增益特性採用打靶法和四階龍格- - -庫塔進行了數值計算，在給定了兩個泵浦光源的波長和最大功率后，找出了反向泵浦情況下使c波段wdm光源增益最平坦的兩個泵浦的各自最佳功率，同時也分析了導致信號光飽和的原因。
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