噪聲應激 的英文怎麼說

中文拼音 [zàoshēngyīngjī]
噪聲應激 英文
noise stress
  • 噪 : 動詞1. （蟲或鳥叫） chirp 2. （大聲叫嚷） make noise; make an uproar; clamour
  • 應 : 應動詞1 （回答） answer; respond to; echo 2 （滿足要求） comply with; grant 3 （順應; 適應） suit...
  • 激 : Ⅰ動詞1 （水因受到阻礙或震蕩而向上涌） swash; surge; dash 2 （冷水突然刺激身體使得病） fall ill fr...
  1. But sometimes self - excited oscillations and noise may appear in hydraulic flapper - nozzle servo - valve if its construction is not selected very correctly. if self - excited oscillations and noise appear in hydraulic servo - valve, the performance of hydraulic control systems may lose stability

    因它具有非常快的響應速度，所以是目前應用最廣泛的伺服閥，但它也存在自激現象，容易產生自激噪聲和振蕩，嚴重影響伺服控制系統的穩定性。
  2. 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。
  3. In the present dissertation, friction - induced noises emitted by a flat specimen rubbing against another flat specimen or a ball specimen under reciprocating sliding are studied. the detailed observation of the scars is conducted by means of a scanning electrical microscope ( sem ), laser scanning microscope ( lsm ), optical microscope and profilometer. the dynamic state variables are analyzed in detail using the discrete wavelet transform

    使用電子掃描顯微鏡（ sem ） 、激光掃描顯微鏡（ lsm ） 、光學顯微鏡和表面輪廓測量儀等設備對摩擦噪聲發生的區域進行了詳細的觀察和分析，運用小波變換技術對摩擦噪聲狀態下的動力學變量進行了深層次的研究，應用matlab simulink語言對摩擦系統進行了振動動力學模擬，系統地研究了摩擦噪聲的形成機理。
  4. The stability output second harmonic generation ( shg ) experiment results of single - longitudinal mode and multi - longitudinal mode with long cavity were explained reasonably with these rate equations. the high polarization of fundamental wave in the isotropic laser media nd : yag with type - i critical phase - matching lbo was studied with the rate equations including polarization of fundamental light. using the polarization function of lbo, a quartz full - wave plate was introduced into the cavity, a kind of birefringent filter by considering the combination of the polarization function of the type - i critical phase - matching doubling frequency crystal lbo and the quartz whole - wave plate was constructed

    將腔內多縱模倍頻速率方程推廣應用到準三能級藍光激光器中，分析了一個縱模、兩個縱模、多個縱模時的噪聲情況，合理地解釋了實驗中激光器單縱模運轉以及長腔多縱模運轉時穩定輸出的實驗現象，同時利用該速率方程分析了以各向同性激光晶體nd : yag為工作物質，類臨界相位匹配lbo為倍頻晶體的藍光激光器中基頻光偏振特性，合理利用類臨界相位匹配lbo倍頻晶體的偏振特性與引入的石英晶體全波片構成雙折射濾光片，通過選單頻來抑制噪聲，獲得了藍光低噪聲的穩定輸出。
  5. On the base of studying imaging theory of lens, the imaging theory of laser confocal scanning microscopy was analyzed in detail in this paper, and the advancement of that the optical fiber was applied to the system was described ; on the base of completed the demonstration for whole project, the experiment scheme was designed ; the relationship between the main parameters of key devices and the resolution was deduced, and the requirements of coupling efficiency and vignetting effects to optical system was analyzed ; the design of optical system and the planar scanning controlling circuit was completed ; a new method was put forward to resolved the inherent non - liner scanning problem of the galvanometer scanner by using software liner controlling in circuit design, and the perfect planar scanning was realized ; at last the low noise, high multiple and non - distortion amplify circuit of photoelectric detector was completed

    本文在透鏡成像理論的基礎上，系統、深入地分析了共焦掃描顯微成像的機理，論述了應用單模光纖的激光共焦掃描顯微成像系統的優點；進行了總體方案的論證，並設計確定了單模光纖激光共焦掃描顯微成像系統的總體方案；從理論上推導分析了解析度要求與試驗系統中相關器件主要參數之間的關系，分析了系統耦合效率和漸暈現象對光學系統的設計要求；完成了方案中光學系統和二維掃描控制電路的設計，並在電路設計中採用了用軟體解決檢流計式光學掃描器（振鏡）非線性問題的新方法，能夠實現較為理想的二維模擬掃描；完成了高增益、低噪聲和低失真的探測接收系統的設計和調試。
  6. In order to better detect the image edge information, firstly, non ? linear median filter technology of characteristic direction was applied to filter out the gauss noise ; secondly, ( 3, 1 ) biorthogonal spline wavelet was used as the primitive wavelet filter, adopting lifting scheme to build the most superior biorthogonal wavelet filter, and applying the superior biorthogonal wavelet to the multiresolution wavelet edge detection ; at the same time, floating threshold was defined and applied to the image edge detection, and the image edge position was located accurately

    在激光探測系統中，微弱的回波圖像淹沒在強背景噪聲中，為更好地檢測這類含噪圖像的邊緣信息，首先應用特徵方向非線性中值濾波技術，濾去高斯噪聲；其次，選擇（ 3 ， 1 ）雙正交樣條小波作為原始小波濾波器，採用提升方案構造最優雙正交小波濾波器，應用構造的雙正交小波進行多尺度小波邊緣檢測；同時，通過定義浮動閾值，並應用於圖像邊緣檢測，較準確地定位了邊緣位置。
  7. In order to better detect the image edge information, firstly, non - linear median filter technology of characteristic direction was applied to filter out the gauss noise ; secondly, ( 3, 1 ) biorthogonal spline wavelet was used as the primitive wavelet filter, adopting lifting scheme to build the most superior biorthogonal wavelet filters and applying the superior biorthogonal wavelet to the multiresolution wavelet edge detection ; at the same time, floating threshold was defined and applied to the image edge detection, and the image edge position was located accurately

    在激光探測系統中，微弱的回波圖像淹沒在強背景噪聲中，為更好地檢測這類含噪圖像的邊緣信息，首先應用特徵方向非線性中值濾波技術，濾去高斯噪聲；其次，選擇（ 3 ， 1 ）雙正交樣條小波作為原始小波濾波器，採用提升方案構造最優雙正交小波濾波器，應用構造的雙正交小波進行多尺度小波邊緣檢測；同時，通過定義浮動閾值，並應用於圖像邊緣檢測，較準確地定位了邊緣位置。
  8. Based on analyzing the features o f low frequency phase noise of laser beam, rms of phase gradient was introduced to characterize it and the corresponding wavefront model was constructed by usin g random phase screen

    在分析強激光束低頻位相噪聲特點的基礎上，採用位相均方根梯度表徵激光束的低頻位相噪聲並結合隨機位相屏構建相應的畸變波前模型。
  9. The study reveals that all these two filtering can eliminate noise efficiently, they are reliable in the case that the strength of observed noise and seismic excitation estimated incorrectly in practice

    這兩種濾波器都能很好地去除觀測噪聲，對實際應用中可能發生的不正確估計觀測噪聲強度的情況，和不正確估計地震激勵強度的情況，兩種濾波器都是穩定可靠的。
  10. The compensator compensates the change of polarized light, and also controls the polarized orientation. in result, we get a cavity, with the orientations of the linear polarized multi - longitudinal modes are agree. the noise of green output reducing, the cavity is steady with multi - longitudinal modes operating

    本文首次將nd ： yvo _ 4晶體應用於抑制激光噪聲的補償片法中，利用nd ： yvo _ 4晶體的線偏振特性，控制諧振腔內激光束的偏振方向，使多縱模均為線偏振，且偏振方向一致，從而減少了綠光輸出中的波動現象。
  11. Melp vocoders utilize mixed pulse and noise as the excitation to elimate the buzzes in traditional lpc vocoders, and add a jitter voicing state to overcome the tonal noise. parameters " interpolation, adaptive spectrum enhancement and pulse dispersion also are adopted to improve the continuity. the synthetic speech of melp vocoders sound much more natural and perceivable than the traditional vocoders "

    Melp聲碼器採用混合脈沖和噪聲激勵解決了經典lpc的嗡嗡聲的問題；引入了抖動濁音狀態以克服音調噪聲；利用參數插值、脈沖散布和自適應譜增強等措施提高合成語音的自然度和可懂度；此外還採用了多帶激勵，使其具有了比較強的抗背景噪聲的性能。
  12. The simulation results show the proposed method can effectively filter the impulse noise and deduce the negative impact on image smoothing by the median filter. ( 2 ) for the feature extraction, an improved barnard - log feature extraction algorithm is proposed

    並通過模擬說明該演算法能夠比較好的濾除沖激噪聲和減小中值濾波對圖像引入的平滑效應; （ 2 ）針對特徵提取問題，採用與log特徵聯合操作的方法，改進barnard特徵提取演算法。
  13. When the two - dimensional decoupling theory is applied to a single - mode laser system, it is shown that there is relatively large fluctuation in the phase when the laser undergoes from thermal light to coherent light. it is shown that increasing the noise correlation time t can also reduce the fluctuation in the phase of the laser light

    將二維退耦理論應用到單模染料激光系統中時，我們還發現，當系統運行在從熱光場到相干光場的過渡過程中時，系統的位相存在相對較大的漲落，增加噪聲關聯時間可以抑制激光場的位相漲落。
  14. Abstract : the threshold algorithm of the target detection is often used to detect target echo signals. its performance is based on signals - noise ratio. when signals - noise ratio is great than 6. 7, the target can be detected. in order to increase the signals - noise ratio, matching filter is often used. if the system is narrow band system, the noise is color noise and matching filter cannot be used. therefore, the signals - noise ratio cannot be increased. however, the geometrical characteristic of the laser echo signal is different with the noise. this paper advises the algorithm that detects the target by the geometrical characteristic. when signals - noise ratio is great than 2, this algorithm can detect target. this algorithm has been used in practice

    文摘:目標檢測的閾值法經常用於檢測目標的回波信號.它的性能取決于信噪比，當信噪比大於6 . 7時，能夠檢測出目標.為了提高信噪比，經常採用匹配濾波器.如果系統是窄帶系統，噪聲為色噪聲，無法使用匹配濾波器，不能提高信噪比.激光回波信號的幾何特徵不同於噪聲.提出了一種利用這種幾何特徵檢測目標的演算法.當信噪比大於2時，該演算法能夠檢測出目標.該演算法已經實際應用
  15. In this dissertation, the response in two - degree - of - freedom nonlinear system under random external excitation is investigated by using analytical and numerical method

    本文用解析和數值方法研究了窄帶隨機噪聲外激下非線性系統的響應問題。
  16. It has been proved that some structural adjustments may somehow cut down on the surface radiation noise of the engine, thus bringing down the overall noise level. basically it means to increase the structural rigidity and the damping so as to reduce the structural surface response under the same exciting force

    實踐表明，在結構上採取措施可以一定幅度地降低發動機的表面輻射噪聲，從而降低整機噪聲。控制的基本措施是增加結構剛度和阻尼，使得在同樣的激振力作用下減少結構表面響應。
  17. The expressions for correlation functions, power spectrum and correlation time of the intensity of a single - mode laser driven by two white noises with a exponential function correlation form were calculated by linear approximation method

    應用線性近似方法，計算了具有指數形式關聯的兩白噪聲驅動下單模激光光強的關聯函數、功率譜及關聯時間。
  18. 4. the lpfgs are used in single wavelength er - doped fiber amplifiers ( edfas ) as a spontaneous emission noise ( ase ) filter, and the gain of the edfa is increased by 7db and the noise figure ( nf ) is decreased by 0. 5db, for the first time

    4 、成功研製了摻鉺光纖放大器，首次將高頻co2激光脈沖寫入的長周期光纖光柵應用到摻鉺光纖放大器中作為自發輻射噪聲濾波器，使edfa的增益提高了7db 、噪聲系數降低了0 . 5db 。
  19. At the same time, the dynamic response of structure under environmental excitation such as ground micro - earthquake, vehicle vibration and wind vibration, is usually disturbed with noise. thereby, the signal - to - noise ratio of data collected by sensors is rather low

    同時，結構在環境激勵（如:地面微震、車輛振動或者風振等）作用下的響應信號由於受到噪聲干擾，儀器所能採集到的信號信噪比較低，而且是非平穩信號。
  20. Secondly, functional derivation is employed to analyze the two - dimensional colored noise in the third order laser model with dispersive medium. the stationary intensity distribution is derived. the variation of the most probable intensity with pump parameter and noise intensity correlation time is investigated

    其次從色散型介質中三次激光模型出發，通過泛函導數，應用小近似計算兩維色噪聲，得到激光場定態強度分佈，研究了定態強度分佈的極值點隨抽運參量和強度噪聲相關時間的變化情況。
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