水下聲學 的英文怎麼說

中文拼音 [shuǐxiàshēngxué]
水下聲學 英文
underwater sound
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 下 : 下動詞1. （用在動詞后,表示由高處到低處） 2. （用在動詞后, 表示有空間, 能容納） 3. （用在動詞后, 表示動作的完成或結果）
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  1. In this paper matlab and vb are used to build a software which can predict absorption coefficient ' s of the underwater anechoic coatings from these analytical models. finally, some algorithm of the single parameter minimization, nonrestraint nonlinear minimization and restraint minimization in the optimization design theory are studied. the formulas of absorption coefficient of these analytical models are object functions

    本論文利用各種解析模型的聲學設計理論，使用matlab與vb軟體建立了一套水下消聲覆蓋層吸聲系數預報軟體，研究了最優化設計中單參數最小化、無約束非線性最小化和有約束最小化理論的一些演算法，利用現有模型的吸聲系數計算公式作為目標函數，初步優化了一些結構的材料參數。
  2. According to their space position, the seismic features of shallow gas in this region can be divided into three groups : ( 1 ) features in the stratum : acoustic blanket, acoustic curtains, acoustic turbidity, irregular strong top reflection boundary, and phase pull - down in both flanks ; ( 2 ) features of the seabed : seabed pockmark and giant sunken pit ; ( 3 ) features in the seawater column : acoustic plumes, cloudy turbidity and point - line - type reflection

    該區的淺層氣地震特徵按空間位置分為3大類： （ 1 ）地層中的特徵：聲學空白、聲學幕、聲學擾動、不規則強反射頂界面、兩側相位下拉； （ 2 ）海底面的特徵：海底麻坑、大型塌陷坑； （ 3 ）海水層中的特徵：聲學羽流、雲狀擾動、點劃線反射。
  3. The experimental data are in good agreement with the calculated results of the model by analysis of the data of the laser pulse of different energy induced the laser plasma shock front by acoustics means. in addition, the calculated results of the model are in good agreement with the experimental data by optics means

    同時設計應用聲學方法對水中不同能量的脈沖激光作用下產生的激光等離子體沖擊波波前傳播過程進行測試及數據分析，對光學陰影方法探測的激光等離子體沖擊波近場波前傳播數據進行詳細分析，結果表明新模型計算結果與實驗測量值一致。
  4. In this paper, the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error, the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range, and is very expensive. 2 ) two important approaches in geophysical navigation techniques are summarized, one is terrain contour based navigation, this approach is investigated keystone today ; the other is image based navigation, due to no perfect image sensors and image seabed map, this approach has seldom been practised. 3 ) two important terrain contour based navigation algorithms has been applied to auv, one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )

    主要研究內容包括：一、總結分析了當前水下導航的常用方法和不足之處，指出基於航位推算的導航方法，存在著最大的問題就是導航誤差的積累問題，如果沒有修正系統，這種方法很難滿足使用要求；其次指出基於聲學的導航方法，造價昂貴，導航范圍有限，難以滿足自主水下航行器大范圍導航的需求；二、總結了當前水下地形輔助導航的主要技術路線，一是基於地形高程的匹配方法，這是當前研究的重點；二是基於地形圖像的匹配方法，由於缺乏良好的圖像傳感器，和可用的海底圖像地圖，目前這種方法還有待研究發展；三、將兩種地形高程匹配的常用方法應用到自主水下航行器上：以相關演算法為前提的地形輪廓匹配（ tercom ）方法和以卡爾曼濾波為基礎的桑迪亞慣性地形輔助導航（ sitan ）方法，前者演算法簡單可靠，但是導航精度不高，後者雖然精度比較高，但存在著演算法較為復雜、有可能發散和出現奇異值等問題。
  5. Another based mathematics model about the anchor cable is used for ship - anchor system. the numerical calculation have been worked by programmed in the matlab language. at the same time the influence that the dragging speed of antisubmarine helicopter and the height over the surface of ocean acts on the shape and the tension of underwater cable, and that the current velocity and the diameter of anchor cable acts on the shape and the tension of anchor cable, has been calculated

    把建立的水下拖索數學模型和錨索數學模型分別應用於航空吊放聲納探頭?纜繩動力學系統和船?錨系統，採用matlab語言編程進行了數值計算，同時分別計算和分析了反潛直升機拖速、距海面高度對拖索形狀和張力的影響以及海流速度、錨索直徑對錨索形狀和張力的影響。
  6. The types of impedance transition and of composite resonant are now widely used, but the research in this area is not perfect. in this paper analytical means is used to study absorption coefficient ' s prediction models. diversified cavity structures and material parameters are analyzed in detail in order to the anechoic coalings " acoustical design

    現代應用的吸聲層基本是阻抗過渡結構或復合諧振吸聲結構，但我國在這一領域的研究卻不盡如人意，針對水下消聲覆蓋層的吸聲系數預報及聲學設計問題，本論文利用多種解析方法研究聲學模型，並對各種模型的聲腔結構和材料參數做了詳細的分析，為消聲層的聲學設計打下了良好的基礎。
  7. The saint porch company during the development development home use product, ( the home use product includes ; the down - flow pipe sound insulation, the soundproofing suspended ceiling, the soundproofing wall, the soundproofing floor, the sound - insulated gate, the window and so on ), meanwhile displays the acoustics decoration specialized special skill, meets each acoustics question for the project in, provides the specialized design, the specialized construction, specially aims at the theater, multi - purpose hall, singsong house, pronunciation faculty working office, conference room, recording awning, restaurant, hotel and so on, but also has the equipment level ( between equipment ) the noise quite big place, carries on the specialized design, the construction and the transformation, and achieves the ideal effect

    聖軒公司在開發研製家用產品同時， （家用產品包括；下水管隔聲，隔聲吊頂，隔聲墻體，隔聲地板，隔聲門，窗等） ，同時還發揮聲學裝飾專業特長，為工程中所遇到的各種聲學問題，提供專業設計，專業施工，特別是針對影劇院，多功能廳，歌廳，語音教研室，會議室，錄音棚，酒樓，飯店等，還有設備層（間）噪音比較大的場所，進行專業設計，施工及改造，並且達到理想的效果。
  8. Acoustics repairs it to include : family down - flow pipe sound insulation wrap, soundproofing suspended ceiling, soundproofing wall plate, soundproofing floor, piano room sound insulation repair, kindergarten sound insulation repair, recording awning sound insulation repair, supplementary class sound - insulated repair and so on, also may carry on the design construction according to owner ' s request, also construction simple, material fire protection, moisture - proof, the environmental protection, the price inferiority is high, and by specialized executes the engineering unit construction guarantee quality

    聲學裝修它包含：家庭下水管隔聲套，隔聲吊頂，隔聲墻板，隔聲地板，鋼琴房隔聲裝修，幼兒園隔聲裝修，錄音棚隔聲裝修，補習班隔音裝修等，也可根據業主的要求進行設計施工，且施工簡便，材料防火，防潮，環保，價低質高，並由專業的施工隊施工保證質量。
  9. U. s. biologists were counting on an underwater recording of humpback whale songs to lure two injured whales back down the sacramento river and toward the ocean

    美國生物學家利用座頭鯨聲音的水下錄音，試圖引導兩只受傷鯨魚掉頭離開沙加緬度河回到海洋去。
  10. We select a common feature in the image - edge of the object as our research content and from this point we spread our work including the contrast enhancing technologies, using mathematical morphology to restrain noises in image, extracting of the geometric primitives, dwt in edge detection and the border thinning and tracing technologies

    我們重點針對圖像物體的最直觀特徵?邊緣進行研究，以此為出發點，研究了包括水下圖像對比度增強，利用同態學進行水下圖像噪聲去除，直線和橢圓基元的提取，利用小波變換進行邊緣提取以及基於多邊形近似原則的邊緣追蹤技術在內的各種演算法。
  11. The purpose of this work is to use a single acoustic transducer to perform as a command master, which acts as several signal sources, to control the remote operation vehicle

    本文主要在探討如何利用簡易之水下聲學設備來創建一套可靠之水下通訊及遙控裝置，以供水下載具使用；再結合網路遙控方法，使得網路的遙控與通訊的架構得以成型。
  12. Then analytical measurements of the noise were carried out on both of the turbines by means of modern acoustic apparatus and a conclusion has been found that the noise of the concentrated wind energy turbine is lower than the one of the ordinary wind energy turbine and the root of the trouble to cause noise chiefly originates from the turbine blade. besides, the result of analytical measurement also reveals that the power output both of the wind energy turbines will increase with the increase of the wind speed and unfortunately does the noise too. in order to lower the noise, a measures of noise reduction have been advanced that an active method is to develop a wind energy turbine run at a lower rating of wind speed while the passive method is to adopt a board drilled tiny holes, having established a sound technological basis for the development of a kind of wind energy turbine of low noise and high level in the world

    主要對濃縮風能型風力發電機在正常運轉時，噪聲產生的機理進行了理論分析研究，並與普通型風力發電機的噪聲進行了對比實驗分析；利用現代聲學測試手段對兩類機型進行測試與分析，得出濃縮風能型風力發電機產生噪聲低於普通型風力發電機和葉輪是風力發電機產生噪聲的主要部件的結論；通過對兩類機型的噪聲、輸出功率的測試，得出隨著風速的增加，兩類風力發電機的輸出功率在增加，產生的噪聲也在增加的結論；提出了進一步降低濃縮風能型風力發電機噪聲的措施，從主動降噪方面，研製低額定轉速的發電機；從被動降噪方面，採用微孔穿板的降噪結構；為研究開發一種國際上低噪聲、高水平的風力發電機打下了良好的技術基礎。
  13. For the two parts mentioned above, this paper introduces a high precision positioning system for underwater application, which is made up of dgps and acoustical ultra short baseline. in this positioning system, the emphasis has been put on the mathematical model for positioning computation, and based on the model the author has given computer simulation results for positioning computation

    在本論文中，介紹了一套由dgps和水聲超短基線構成的水下精確定位系統，重點建立了用於此系統定位解算的數學模型，進而以該模型為基礎進行了定位解算的計算機模擬模擬，模擬結果進一步驗證了數學模型的正確性和系統的可行性。
  14. The design of cable dome is divided into three parts : pre - stressed calculation, static load applied calculation and variation load applied calculation. ansys software was adopted to compute the structure. the ansys program has many analysis capabilities, ranging from structural analysis, thermal analysis, electromagnetic field analysis to cfd flotran analysis

    索穹頂結構分下述三個狀態進行計算：預張拉狀態、施加屋面恆載時的計算和屋面活荷載作用下的計算；本文對索穹頂結構進行計算時所選用的計算軟體為ansys軟體，它是融結構、熱、流體、電磁、聲學於一體的大型通用有限元分析軟體，可廣泛應用於核工業、土木工程、地礦、水利等一般工業的計算及科學研究。
  15. Based on apdl, the design language of finite element analysis software ansys, and visual c + +, the software on acoustics design of underwater cylindrical shell structure is developed. when input parameter of the cylindrical shell in the interface redeveloped in this paper, the software execute the batch file of apdl in the vc process to establish the finite element modal and carry out the analysis, the analysis result and the vibration mode can also be displayed. furthermore, the software has been developed to process the acoustics optimization design of the finite cylindrical shell with stiffener in appointed frequency range

    本論文從便於工程實際應用出發，對使用有限元分析軟體進行二次開發以方便結構振動分析及改進結構設計的方法和過程進行了研究，在此基礎上對水下航行器圓柱殼體的結構聲學特性進行了分析，在指定頻率區間，對結構以振動輻射聲功率級為目標函數進行了部分參數的結構優化設計，與此同時，為了方便有限元分析軟體的使用和簡化設計過程中大量重復的工作，利用ansys提供的參數化設計語言apdl （ ansysparametricdesignlanguage ）結合vc對有限元軟體ansys進行了二次開發，形成了一體化的水下圓柱殼體結構聲學設計軟體。
  16. From the point of kinematics and dynamics, the author analyses the propagation rules of stress waves in concrete, namely time - space relations, wave amplitude attenuation, dispersion effect and characteristics of transmission of reflected waves and acoustic waves. combining with engineering practices, the author also concluded the main points of low strain detection of integrity of longdiameter underwater cast - in - situ piles, and pointed out that comprehensive and relational utilization of reflected waves method and acoustic wave transmission method can accurately evaluated the integrity of pile shaft and then improve the reliability of detection. 6figs., 3refs

    從運動學和動力學角度，分析應力波在混凝土中的傳播規律：時空關系、波幅衰減、頻散作用以及反射波與聲波透射的特點，結合工程實踐，總結大直徑水下灌注樁低應變檢測的工作要點，指出綜合、合理運用反射波法與聲波透射法，可以較準確地評價樁身完整性，提高檢測結果的可靠性.圖6 ，參3
  17. After studying the mechanism of the underwater targets radiated noise, we learned that the signals are related to the correspondent dynamics

    對於水下目標輻射噪聲的產生機理，可以發現它們與相關動力學系統的結構有關。
  18. With the progressive development of underwater acoustic detection and acoustic - guided weapons, more advanced requirements are imposed upon the acoustic properties of submarines

    隨著水聲探測潛艇的手段和方法以及帶有聲制導的水下武器的不斷完善，對潛艇的聲學性能的要求越來越高。
  19. It is well known that the coupled interactions between the ship hull and the surrounding fluid field of explosion give rise great influence to both the fluid loadings over the structural wetted surface and the responses of the hull. jt is the coupling effect that provides the major difficulties in the underwater explosion induced dynamic responses of the ship structure. the second order doubly asymptotic approximation method ( dda2 ) has been commonly employed in the world to deal with the coupling effect

    本文針對daa方法不適合於分析敷有聲阻抗與水差不多的聲學材料（如玻璃鋼與消聲瓦）的船體結構與水下沖擊波相互作用的局限性，依據聲波的反射和透射原理對二階daa方法的高頻段進行了改進，發展並提出了能夠分析聲學材料流固相互作用的adaa方法（ acousticdaa ） ，拓展了應用范圍，使現有的二階daa方法成為它的一個特例。
  20. Because the acoustics, the resonance changes according as the weight of the water is equal to the law of falling water

    因為從聲學上來說，共鳴就像水壓相等於液體下降的法則那樣起變化的。
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