emission frequency 中文意思是什麼

emission frequency 解釋
發射頻率
  • emission : n. 1. （光、熱、氣體等的）發出，發射，射出，放射；傳播。2. （紙幣等的）發行；發行額。3. 發出物，放射物。4. 【醫學】排出；遺精。
  • 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. The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.

    聲發射源與接收訊號傳感器間的距離以及環境噪聲的電平是選擇頻帶的主要依據。
  2. An acoustic-emission pulse contains a very wide range of frequency components, extending up into the megacycle range.

    聲發射脈沖就包含一個很寬的頻率組成范圍，可擴展到兆赫。
  3. For micro - cavity semiconductor laser, station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised. for current noise, sp noise, noise, p noise, as well as current modulation, sp modulation, modulation and p modulation, using small - signal approximation, we derive the laser ' s corresponding transfer functions. and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr

    本文對于微腔半導體激光器，提出站模型，能夠較直觀簡潔地分析微腔半導體激光器的穩態和瞬態特性，利用此模型對具有重要實用價值的= 1的微腔半導體激光器進行了討論；對于電流i噪聲、自發發射壽命_ （ sp ）噪聲、自發發射因子噪聲、光子壽命_ p噪聲，以及電流調制、 _ （ sp ）調制、調制、 _ p調制，在小信號近似下，得到了相應的激光器的傳遞函數；在大信噪比的前提下，對激光器進行了頻域分析，分別計算了它們在不同參數下的信噪比增益，分析了其抗噪聲性能。
  4. Very low frequency emission

    甚低頻發射
  5. In the two - photon resonance case, part of the input pulse energy is transformed into higher and lower frequency components through amplified spontaneous emission and four - wave mixing, and the medium shows strong optical power limiting effect

    在雙光子共振情況下，即入射脈沖頻率等於1 、 3能級之間的共振頻率的一半，由於介質中放大的自發輻射和四波混頻的作用，部分入射脈沖能量轉化為高頻和低頻電場成分的能量，分子介質表現出了很強的光功率限幅特性。
  6. Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density. several novel phenomena can be obtained. the spontaneous emission displays an oscillatory behavior, classical light localization, photon - atom bound state, nonzero steady - state population and anomalously large vacuum rabi splitting. and localized mode associated with a defect site in an otherwise perfect photonic crystals, acts as a high - q micro - cavity

    通過原子上能級與光子頻率帶隙邊緣的相對位置或者光子態密度，可以抑制或增強原子的自發輻射。分析並得到了一些奇異的現象，如自發輻射的諧振子行為、光的局域、單光子?原子局域態、上能級中存在非零穩態原子布居數、類似於真空中的拉比頻率分裂等。
  7. ( 8 ) by studying match between the electronic system and catalytic converter on the base of electronic controlled bypassing air system, conclusions having been gotten as follows : higher conversion efficiency of emission have gotten when a / f fluctuates at definite scope and frequency, by controlling the comparing voltage of 02 sensor, the working scope of catalytic converter can be controlled and the matching that can fulfill the high efficiency of hc, co, nox at same time has been optimized

    （ 8 ）進行基於所開發的電控補氣系統上的催化器與電控系統的匹配研究，當控制系統調節空燃比在一定范圍按照一定頻率進行波動時，可以提高催化轉化器的轉化效率；通過控制氧傳感器的比較電壓，可以控制催化轉化器的工作窗口，實現排放污染物中， hc 、 co 、 nox轉化的最優匹配。
  8. The terahertz emission, which is a second - order response, and the four - wave mixing signal, a third response, are given the expressions related to the lorentz local field factor l. we found a four - wave mixing signal in the direction 2k2 - k1 for the negative time delay, and the frequency of the four - wave mixing signal has a shift related to the lorentz local field factor l

    計算之後，我們給出太赫茲輻射與四波混頻信號關于lorentz局域場因子l的表達式，發現負時間延遲時在2k _ 2 ? k _ 1方向仍有四波混頻信號，其頻率也有所改變。
  9. According to the test conditions, the double polarity inputting mode is adopted in the circuit of voltage - frequency converting part ; storage batteries are used in the optical emission part of optical fibre isolating and transmitting device, that can guarantee isolation between the main circuit and the testing system ; the 89c51 singlechip is used in the singlechip testing - controlling unit, the peripheral circuits are extended, data are transmitted through the serial port in this part ; the p opular software delphi5. 0 is used in the pc part, the communication between singlechip and pc by serial port, plotting of current wave, regulation of data ; the optical - electrical isolating and triggering are used in the controlling part, this can guarantee the veracity and reliability of breakers triggered, this triggering mode is also used in the triggering of the main closing breaker, the tested breaker and the assistant breaker, the triggering signals are sent out by a singlechip

    壓頻轉換部分電路中根據實際情況採用了雙極性輸入方式；光纖隔離傳輸裝置的光發射部分電源採用了蓄電池供電，確保了主迴路與測試迴路的完全隔離；單片機測控部分採用了89c51單片機，擴充了外圍電路，通過串口向pc機傳送數據； pc機與單片機之間的串口通訊、波形繪制、數據管理等都採用了軟體delphi5 . 0編寫。該測試系統中預留了輸出口，可以對合成迴路中的主合閘開關、被試開關、輔助開關進行觸發，信號由單片機發出，控制部分採用了光電耦合隔離觸發的方法。軟體設計主要集中在對電流信號的數據採集、數據處理、數據傳送、人機界面、波形繪制和數據管理，軟體部分又可分為單片機和pc機程序設計兩大部分。
  10. Then a model on electromagnetic emission relying on the extent of cracks is put forward. using this model, the amplitude of electrical field and magnetic field, the largest frequency are estimated

    研究表明，混凝土隨裂紋的擴展產生幅值逐漸增加的電發射脈沖；混凝土隨材料組成不同在開裂時產生不同形式的電發射脈沖。
  11. The bzt thin film has good properties in high frequency. the essential principle, technology process and advantages of the ba ( zr0. 3ti0. 7 ) o3 ( bzt ) ferroelectric thin films grown on pt / ti / sio2 / si substrates and quartz substrates by sol - gel process are introduced. the heat - treatment technology was fixed according to the dsc - tg measurement, afm ( atomic force microscope ) and fe - sem ( field emission - scanning electrical microscope )

    我們通過在pt / ti / sio2 / si襯底和石英襯底上制備ba （ zr0 . 3ti0 . 7 ） o3鐵電薄膜，了解了溶膠-凝膠法（ sol - gel ）制備薄膜的基本原理、工藝過程及工藝特點;並對所制得的ba （ zr0 . 3ti0 . 7 ） o3薄膜的前驅體溶液和干凝膠進行了差熱與熱失重（ dsc - tg ）分析，確定了溶膠在熱處理各個階段的反應情況。
  12. Electromagnetic compatibility - limits - guide to signalling on low - voltage electrical installations - emission levels, frequency bands and electromagnetic disturbance levels

    電磁兼容性.第3部分:極限.第8節:低壓電氣設備信號傳輸指南.輻射級頻帶和電磁干擾級別
  13. Electromagnetic compatibility - part 3 : limits - section 8 : signalling on low - voltage electrical installations - emission levels, frequency bands and electromagnetic disturbance levels

    電磁兼容性.第3部分:限值.第8節:低壓設備用符號.輻射級頻帶寬和電磁干擾級別
  14. The properties of spontaneous emission depend not only on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density but also on the relative distance of the atomic space position from the sidebrand. and we study other property of spontaneous emission

    其性質除了依賴于原子上能級與光子頻率帶隙邊緣的相對位置或光子態密度，還依賴于原子的空間位置與側支距離。並對原子的自發輻射的其它特性進行了分析。
  15. Moreover, multiple frequency stimulation method can increase consumption of ic obviously and surface diffuse reflection method can improve surface emission coefficient of ic availably

    混和信號激勵法能明顯增大三極體放大電路耗散功率，特別是第一級耗散功率；增頻激勵法能有效提高ic耗散功率；表面漫射法能有效增大元器件的發射系數。
  16. Frequency spectrum characteristics of electromagnetic emission of loaded coal

    受載煤體電磁輻射的頻譜特徵
  17. Using field emission cathode, x ray source can be made with several advantages : smaller volume and brighter, high frequency response, in - time turning on, etc. considering of the merits and potential markets, researching and fabricating miniature x - ray source is meaningful

    由於突起數目大且尖端頂端電場強度高，因此產生很大的場發射電流密度。採用場發射陰極的x射線光源具有體積小，輻射強度高，頻率響應快，可以隨時開啟，無需預熱的優點。
  18. In large rotating machinery using filmatic bearing ( turbogenerator, air compressor, etc. ) there is a potential trouble from impefect installation or running conditions, a metals " contact between rotors and shells. the trouble is usully called rubbing. the advantage of ae technologe in the rubbing diagnosis and early detection is showed. instead of classical ae characteristic parameters ( counts, amplitude, energy, duration and the other ones ) a new feature extraction by frequency analysis of ae envelop signals is discussed. both research of ae process and field experements indicate that periodic components in the envelop spectrum related to rotational speed increase evidently at the beginning of rubbing production, hence are highly sensitive to the rubbing fault diagnosis. according to the new design an acoustic emission equipment for the rubbing diagnosis named buaa ae testing system is developed and described

    汽輪發電機、空氣壓縮機等採用油膜支撐的大型轉動機械，由於安裝或運行中的原因，在轉子旋轉過程中，可能和器壁發生輕微的摩擦和碰擊，簡稱碰摩.聲發射技術在碰摩發生特別是故障早期診斷上有優越性.本系統的特點是沒有沿用傳統的計數、幅度、能量和持續時間等聲發射特性參數，而是在聲發射包絡信號的頻率分析中進行特徵提取.聲發射發生的過程分析和現場試驗都表明這種方法對碰摩檢測很敏感，在碰摩發生的起始階段，包絡譜中與轉速同步的周期性分量顯著增加.根據這種新的設計思想自行研製了buaa碰摩聲發射檢測儀並對此作了介紹
  19. Methods of measurement on radio receivers for various classes of emission - receivers for frequency - modulated sound broadcasting emissions

    各種發射級別的無線電接收機的測量方法.調頻聲音廣播發射接收機
  20. Methods of measurement on radio receivers for various classes of emission. part 4 : receivers for frequency - modulated sound broadcasting emissions

    各種發射分級用無線電接收機的測量方法.第4部分:調頻聲廣播發射用接收機
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