標準參考頻率 的英文怎麼說

中文拼音 [biāozhǔnshēnkǎobīnlǜ]
標準參考頻率 英文
standard reference frequency
  • 標 : Ⅰ名詞1 [書面語] （樹梢） treetop; the tip of a tree2 （枝節或表面） symptom; outside appearance; ...
  • 準 : Ⅰ名詞1 （標準） standard; guideline; criterion; norm 2 （目標） aim; target Ⅱ動詞1 （依據; 依照）...
  • 參 : 參構詞成分。
  • 考 : Ⅰ動詞1 （考試; 考問） examine; give [take] an examination test or quiz 2 （檢查） check; inspect3...
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 標準 : （衡量事物的準則; 榜樣; 規范） standard; criterion; benchmark; pip; rule; ètalon （衡器）; merits
  • 頻率 : frequency; rate
  1. The specific research methods are listed : 1. matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal. then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves, many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking

    具體研究方法如下： 1 、採用以輸出信噪比最大為準則的最佳匹配濾波器來對分段的參考和目標信號作相關處理來檢測低信噪比目標信號，然後對一維分段相關輸出組作縱向傅立葉變換來濾除靜態或低速的雜波、多徑回波等干擾信號，並提取目標的時差和多普勒頻率，再結合由天線獲得的目標方向等參數，就可以實現目標的定位和跟蹤。
  2. The calibration of a spectrum analyser normally includes checks on frequency accuracy, level flatness, level linearity, input attenuation and calibration reference output

    頻譜分析器的校正工作一般包括檢查頻率準確度、功率電平不平坦度、標度線性、輸入衰減及參考輸出值的校正。
  3. A device that converts a property of an input signal, such as frequency or phase, into an amplitude variation, depending on how the signal differs from a standard or reference signal

    鑒別器，鑒頻器一種將輸入信號的某一特徵，如頻率或相位轉變為幅度變化裝置，其變化大小因信號與標準或參考信號的不同程度而異
  4. It has wide frequency width and high frequency relution. the maximum output frequency can get to 80m and the highest frequency relution can get to 1 u hz, the waveform memory is 64k. it has the important reference value for three classical structures - pc bus card, stand alone, vxi module

    該任意波形發生器不僅能產生正弦波，方波，三角波等常用的標準信號，還可根據用戶的需要生成任意波形，具有寬頻帶，高的頻率解析度等特點，其波形最高輸出頻率可達80m ，頻率解析度可達1 hz ，波形最大存儲深度為64k ，對于目前三種典型的任意波形發生器的結構? pc總線插卡式，獨立儀器， vxi模塊都有重要的參考價值。
  5. The frequency - stability of an al ] - solid - state nd : yvo4 laser is significantly improved by means of a specially designed f - p interferometer used for the frequency standard in the frequency - stabilizing system

    利用f ? p （ fabry - perot ）腔作為頻率參考標準的激光穩頻系統，是長期以來使用的一種簡單而有效的裝置。
  6. The temperature of the f - p cavity is accurately controlled by a set of thermoelectric cooler ( tec ) modules attached on the body of the cavity and the electronic feed - back circuit. we found that the long - term unidirectional frequency shift of the output laser resulting from the slow increase of the cavity length under the effect of the temperature integration on the cavity body is essentially eliminated

    因此，往往有多臺f ? p腔出現在同一個實驗裝置中本文利用珀耳帖元件，對穩頻系統中作為頻率參考標準的fabry ? perot干涉儀進行精密控溫，並利用f - p腔的透射特性，對自製的全固化單頻nd ： yvo _ 4激光器穩頻。
  7. Acoustics - reference zero for the calibration of audiometric equipment - reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 khz to 16 khz

    聲學.聽力測定設備校準的標準參考零點.頻率范圍為8khz至16khz之間的純音用參考等效閾聲壓級
  8. The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 %, which could meet the need of reference signal of the lock - in amplifier

    實驗結果表明，經過優化后的多普勒調制器的輸出調制信號頻率的相對標準誤差達到了1 %左右，能夠滿足鎖相放大器對輸入參考信號頻率穩定度的要求。
  9. The standard is designed to give a new technical solution for a broad range of applications, such as very low bit rate conversational services and entertainment quality broadcast, interactive video - on - demand services etc. for the enhancement of the coding efficiencies, the new standard adopts new tools as following : multiple reference pictures, variable block - size with seven block sizes in motion prediction, quarter - pixel accuracy for motion vector, short word - length integer transform, context - adaptive entropy coding and loop filter deblocking

    H . 264 / avc標準支持從低帶寬、高誤碼率的無線移動視頻通信到高帶寬、低誤碼率的有線視頻廣播等多種應用，因此，日益受到業界的關注。為了實現更高的編碼效率， h . 264 / avc標準採用了很多新的編碼技術，如多參考幀預測、多尺寸編碼塊模式、 1 / 4像素精度運動矢量、整數變換量化、基於內容的熵編碼、新型幀內預測、去除方塊效應的濾波器等。
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