次聲速的 的英文怎麼說

中文拼音 [cìshēngsùde]
次聲速的 英文
infrasonic
  • 次 : Ⅰ名詞1 （次序; 等第） order; sequence 2 [書面語] （出外遠行時停留的處所） stopping place on a jou...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 的 : 4次方是 The fourth power of 2 is direction
  1. The program includes the infrasonic signal data acquisition of three channels, 3 - d dynamic spectrum analysis, correlation analysis of 3 channel infrasonic signals, the calculation of wave direction, the wave speed, the spectrum analysis at any length and a real - time infrasonic gravity wave pressure - time ( p - t ) curve

    本程序支持3路次聲波傳感器信號的數據採集、動態譜分析及次聲信號的相關分析、能計算波源的方位角、波速以及任意時間段的譜分析，並實時給出次聲重力波的壓力?時間曲線（即p ? t曲線） 。
  2. The physical models for those sound synthesis methods can exactly describe musical instruments ' s fundamental and harmonious and inharmonious frequencyies, as well as their nautral sounding process. they can be played like real musical instruments, representing players ' s strength, velocity and pattern, as well as emotion. so, the methods are playing very important roles within the sound synthesis domain currently, with mpeg4 published and improvement of computer ' s computational efficiency

    由於它可以精確地描述物體的發聲及其發聲過程，精確地再現樂器的基波、高次諧波、非諧波以及asdr過程，象真實樂器一樣可以表達演奏者的演奏力度、速度、風格和情感，隨著計算機處理速度的提高，尤其是mpeg4技術的公布，這種方法日趨活躍，成為目前樂器模擬、聲音合成的研究熱點。
  3. ~ ( 252 ) c _ f - source - driven neutron noise analysis method is a way of measuring and analyzing the reactivity of reactor or subcritical reactor, which detects subcritical neutron multiplication factor, prompt neutron decay constant, and so on

    ~ （ 252 ） c _ f源驅動噪聲分析法是一種測量、分析反應堆和次臨界系統的快速反應性的方法，可作為臨界安全的瞬時檢測方法。
  4. In this thesis, based on pershing ii surface to surface missile, a new kind of ballistic missile was designed with an additional rocket engine, which can be ignited twice. firstly, aerodynamic computational models of missile body and warhead which reentry with supersonic are built according to the task requirements ; secondly, the propulsion system model of missile is built whose first two stages are solid rocket engines and the third stage is liquid - solid combined rocket engine. the nozzle and the shape of the engine are designed to meet the needs of the populsion project ; thirdly, the trajectory model of the mass point is built and a wavy trajectory is designed & optimized ; finally, the ability of a missile ' s breaking through defence is analyzed

    以美國潘興導彈為原型，增加可兩次點火的末級發動機，改裝成具有跳躍能力的地地彈道導彈；首先，根據任務需求，建立了導彈的氣動模型，並建立了彈頭再入時高超聲速氣動模型；其次，建立了導彈推進系統模型，前兩級採用了固體火箭發動機，第三級採用了固?液組合火箭發動機，並在總體方案要求下，對發動機噴管和外形進行了設計；第三部分，建立了導彈質點彈道模型，設計了一條跳躍式彈道，並對跳躍式彈道進行了優化設計；最後，對導彈進行了突防能力分析，從分析的結果可以看出，跳躍式彈道的突防能力比常規的拋物線彈道要強。
  5. In an effort to block out the noise and with a longing to hear master s voice and teachings, i wore earphones to listen to master s audio - taped lectures at work. during one such session, i unconsciously reached perfect concentration and my fingers hit the keys so fast that i was practically as quick as a typists with two years experience. i did not have to look at the keyboard

    為了隔絕噪音，也加上渴望聽到師父的聲音及教理，便戴著耳機一邊工作一邊聽開示，不知不覺中，精神層次進入到一種高度集中的狀態，就在那個時候，我打字的速度，幾乎快到和已工作兩年的打字員同步，甚至不必看字盤，就直覺感受到字在那裡，打字變成一種反射動作，自然會將手滑到我所要打的字的位置，毫釐不差。
  6. Almost mad with grief, and determined to venture everything in order to see valentine once more, and be certain of the misfortune he feared, morrel gained the edge of the clump of trees, and was going to pass as quickly as possible through the flower - garden, when the sound of a voice, still at some distance, but which was borne upon the wind, reached him

    他神志昏亂，痛苦得幾乎發瘋了。他決定不顧一切地去和瓦朗蒂娜見一次面，以便確定他所恐懼的那種不幸是否是真的。莫雷爾是到樹叢的邊上正想盡可能以最快的速度穿過花園的時候，忽然遠遠傳來一個聲音，雖然隔得遠，但因為是順風，他聽得很清楚。
  7. Lagrange wave speed in the release process was computed from the measurement, and result shows a good agreement with the data in literature. furthermore from the lagrange wave speed, the stress - strain relationship in the release process was calculated using the impedance match solution. comparison of the stress - strain with the fluid elastic - plastic model indicates that ofhc copper exhibits a clear work - harden behavior during the release

    根據界面粒子速度剖面，計算得到了卸載過程中lagrange聲速隨界面粒子速度變化的關系，所得結果與文獻給出的數據符合很好；其次，利用阻抗匹配近似，計算分析了無氧銅卸載過程的應力-應變關系，並與流體彈塑性模型進行了比較，結果表明：無氧銅的卸載過程存在明顯的應變硬化效應。
  8. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  9. The clues and techniques to improve the resolution of data processing are 1 ) removing the affection of near surface factors on data acquisition, including static correction and noise eliminating technique etc, 2 ) broadening the frequency band of pre - stack seismic data, including amplitude compensation and pre - stack deconvolution etc, 3 ) improving s / n ratio of high frequency and weak reflection signals through multiple coverage with high precision velocity analysis, residual static correction and high - order nmo, raising " dead line of high frequency reflection ", and 4 ) identifying post stack effective reflection frequency band, enhancing dominant frequency and so on

    主要包括：消除近地表因素對資料採集的影響，包括靜校正和噪音壓制技術等；疊前拓寬地震資料領帶，包括振幅補償和疊前反褶積技術等；藉助高精度速度分析、剩餘靜校正和高次項nmo技術，通過多次覆蓋疊加，消除資料中隨機噪聲干擾、提高資料信噪比，尤其是高頻端反射信息的信噪比，改善高頻反射和弱反射信號信噪比，提高「高頻反射死亡線」 ；疊後有限反射頗帶識別、抬高優勢頻率等。
  10. The data acquisition and data flow for various sensor carriers are analyzed systematically, and the calculation models are put forward. the model of quantification of wall - loss defects for in - line inspection with ultrasonic pigs has been established. and inspection data can be pretreated with this model, compressed with dpcm technique and treatd by dsp instruments

    建立了檢測頭數據採集量及數據處理速率模型，首次建立了管道壁缺陷液浸超聲檢測的量化分析模型；提出採用該模型進行數據預處理后，採用差分脈碼調制技術進行數據壓縮，採用dsp器件提高數據處理速率。
  11. According to the jet theory and the characteristics of the flow, the flow can be divided into 6 zones : supersonic core zone, supersonic mixing zone, subsonic mixing zone, secondary flow zone and expanding zone. the rules to distinguish these zones were established. 2

    根據射流理論及引射流動特點，將引射流場結構劃分為超聲速核心區、超聲速混合區、亞聲速混合區、支板背壁迴流區、二次流流動區以及發動機後部膨脹區，並確定了各區域準確劃分的原則。
  12. First - time use - before you can use your headset, charge its self - contained battery for two hours

    重復充電當從聽筒聽到5聲快速警告音並每間隔20秒重復一次時，表明您的耳機需要再次充電。
  13. Recharging - when you hear five rapid high tones through the headset speaker, repeated at 20 - second intervals, the headset battery needs recharging

    重復充電當從聽筒聽到5聲快速警告音並每間隔20秒重復一次時，表明您的耳機需要再次充電。
  14. Secondly, ground on the duct noise control, the delayed - lms algorithm, which is actulized easily, is brought forward, then the simulation on pc is achieved. it is shown from the computer simulation that for the single frequency noise, there will be a good effect when choosing the suitable parameters ; but for the narrowband noise, the effect will become worse with increasement of the bandwidth. this result is helpful to analyze the parameters influencing anc

    結果表明： （ 1 ）隨著濾波器長度的增大，系統收斂速度變快； （ 2 ）隨著值的增大，系統的收斂速度增大，但是當值超過某一范圍時會引起系統的發散； （ 3 ）次級通路的延遲數與初級噪聲頻率有關； （ 4 ）對于窄帶信號， dlms演算法可以取得一定的降噪量，但是隨著窄帶信號帶寬的增大，降噪效果明顯變差。
  15. As result, a new method is presented by using the acoustic emission ( ae ) signal from stem of individual plant as its demand information. based on virtual instruments technique, which is becoming a popular tool in measurement and automation fields international, a computer - based detecting system is developed for the fast, real - time measurement. take tomato crops for testing example in greenhouse, the relation between ae and transpiration, environmental factors has been studied

    因此，從植物本身出發，本文在國內首次採用了以植株莖部聲發射信號作為農作物需水信息的新方法，運用目前在測控領域國際流行的虛擬儀器技術，建立了對作物植株莖部聲發射信息進行實時、快速測量的微機檢測系統，並以溫室盆栽番茄為對象，研究了聲發射信息同植物蒸騰以及環境因子間的關系。
  16. The impact on the muffler performance is realized by the high - speed pulsation gas flow, which regenerates noises and strikes the acoustic elements of the muffler such as the pipe run, the body case and the separator plate to arouse the vibration radiated noise

    氣流影響消聲器性能的主要原因是發動機排氣的高速脈動氣流再生噪聲，其次是這種氣流會沖擊消聲器的管路、殼體、隔板等聲學元件，進而激發振動輻射噪聲。
  17. Its summonses became fast and furious. there were modest tintinnabulations which seemed to stutter and tremble like a first avowal ; there were bold rings which vibrated under some rough touch and hasty rings which sounded through the house with shivering rapidity

    這些鈴聲有些是適度的，像初次求愛者那樣，吞吞吐吐，顫顫慄慄有的是放肆的，鈴被手指頭猛一按就顫動起來有的鈴聲很急促，急速的震蕩聲劃破天空。
  18. According to the mathematic modeling principle of physical problem, the error of lattice boltzmann model is analyzed in chapter 3. the nonlinear deviation term from the navier - stokes equation is given, and the main model coefficients, such as speed of sound, viscosity and so on, are verified by numerical computation, the results show that the lattice boltzmann method has second order precision in space and in time which satisfy the engineering application, whereas, the compressible effect ca n ' t be neglected along with mach number increasing, and must be reduced or eliminated

    其次，按照物理問題數學建模的原則，對格子法的誤差進行了分析，給出了格子bgk方程再現navier - stokes方程時的壓縮誤差項，並數值驗證了格子模型的聲速及粘性系數等相關參數的精度，表明格子模型盡管具有時空二階精度，能滿足工程計算的要求，但隨著mach數增大，壓縮誤差逐漸成為主要誤差，必須予以消除。
  19. In recent several decades, ultrasonic phased arrays had been applied to many medical specialties and nondestructive evaluation ( nde ). an ultrasonic phased array consists of multiple elements which are usually cut or etched from a single piezoelectric plate of lead zirconate titinate ( pzt ). the element thickness determines the operating frequency of the transducer

    近年來，隨著科學技術的飛速發展，超聲相控陣已廣泛的應用在醫學、無損檢測等方面，所謂相控陣，就是由多個壓電陶瓷片（陣元）按一定的分佈排列，然後逐次按欲先規定的延遲時間激發，就可以實現聲波的聚焦。
  20. The sound speed profile is another important factor, the bigger sound speed gradient, the faster reverberation intensity decay and the other factor to the reverberation intensity decaying is sea floor inclination, the greater the slope angle, the slower reverberation intensity decav

    其次，對混響強度影響的第二大因素是聲速梯度，聲速梯度越大，混響強度衰減越快。第三，海底傾斜角也會影響海洋混響的衰減，海底傾斜角越大，混響平均強度衰減越慢。
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