noise in sources 中文意思是什麼

noise in sources 解釋
能源噪聲
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • sources : 世界通訊
  1. Acoustics - determination of sound power levels of noise soures - engineering methods for small, movable sources in reverberant field - part 1 : comparsion method for hard - walled test rooms

    聲學聲壓法測定噪聲源聲功率級混響場中小型可移動聲源工程法第1部分:硬壁測試室比較法
  2. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - methods for special reverberation test rooms

    聲學.噪聲源的聲功率級測定.在混響場中對可移動聲源的工程測量方法.用專用混響試驗室的測量方法
  3. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - comparison for hard - walled test rooms

    聲學.噪聲源聲功率級的測定.在混響聲場中小聲源和移動聲源的工程測量方法.第1部分:硬墻試驗室的比較分析法
  4. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - part 1 : comparison method for hard - walled test rooms

    聲學.測定噪聲源的聲功率級.混響場內小型可移動聲源的工程法.第1部分:硬壁試驗室中的比較法
  5. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - part 2 : methods for special reverberation test rooms

    聲學.聲壓法測定噪聲源聲功率級.混響聲場中小型可移動聲源的工程檢測法.第2部分:專用混響試驗室法
  6. Acoustics. determination of sound power levels of noise sources. engineering methods for small, movable sources in reverberant fields. part 1 : comparison method for hard - walled test rooms

    聲學.噪聲源聲強級的測定.混響聲場中小聲源和移動聲源的工程測量方法.第1部分:硬墻試驗室的比較分析法
  7. Acoustics - determination of sound power levels of noise sources - using sound pressure - engineering metheds for small, movable sources in reverberant fields - part 2 : methods for special reverberation test rooms

    聲學聲壓法測定噪聲源聲功率級混響場中小型可移動聲源工程法第2部分:專用混響測試室法
  8. Precision methods for the determination of sound power levels of noise sources in anechoic and hemi - anechoic rooms

    在無回聲和半無回聲的室內精確測定噪聲源聲功率級的方法
  9. This thesis was divided into eight chapters, and the main results and innovations obtained here can be summarized as follows : ( 1 ) the physics model of tsrs in frequency conversion crystals has been built up firstly. based on quantum - mechanical viewpoints and the following physical processes and parameters : the two - photo interaction of light with matter, paraxial diffraction of stokes, langevin noise sources, reflection at the faces and the edges of crystals, gain coefficient, beam aperture, pulse width and fluence of 3, the physics model of tsrs in kdp and kdp crystals acting as high - fluence frequency convector and the paraxial operator maxwell - bloch - langevin equations have been built up

    全文共分八章，取得的主要成果及創新點如下： （ 1 ）首次建立了諧波轉換晶體的tsrs物理模型本文根據量子力學原理，在考慮如下物理過程和參量的基礎上：光與物質的雙光子相互作用； stokes光的傍軸衍射； langevin （郎茲萬）噪聲源；晶體表面反射和端面反射；增益系數、光束口徑、脈寬和三倍頻光能量密度，推導出高通量激光在kdp和kd ~ * p諧波轉換晶體中的tsrs物理模型和空間上的近軸算符maxwell - bloch - langevin方程組。
  10. 4 ) a uniform crb expression of bearing estimation for spatially distributed sources in unknown noise environments is derived. more exactly, the crb performance of bearing estimation for spatially distributed sources in several typical spatially - correlated noises is evaluated theoretically and numerically, respectively. it is disclosed that the estimated errors mainly depend on space ambiguity between signal and noise components

    4 ）推導了未知噪聲環境中空間分佈源波達方向估計的統一的crb表達式，分析了幾種典型的空間色噪聲情況下分佈源波達方向估計的極限性能，揭示了信號分量和噪聲分量之間的空間混疊對分佈源波達方向估計的決定性作用。
  11. A large planar microphone array, which consists of 111 microphones, was successfully applied to obtain a two - dimensional mapping of the sound sources on a landing aircraft. the focus of study in this paper is on the landing gear noise source. the spectra, directivities and sound pressure levels of flap side - edge noise of 7 narrow - board commercial aircraft and 7 wide - board commercial aircraft are presented. it is found that the landing gear noise spectrum is broadband with some single tones in some cases. the directivity of the total sound pressure level of a landing gear noise resembles that of a horizontal dipole. the level differences between the various aircraft landing gears are larger than those expected from the airspeed differences. it is thus expected that the louder noise emission of the landing gears can be reduced by redesigning

    應用由111個傳聲器組成的平面傳聲器陣列對當前流行的民用客機進場著陸過程中的機體噪聲源進行了實驗測量，本文對七架窄體客機和七架寬體客機的起落架噪聲進行了分析，得到了起落架噪聲的頻譜特性、指向特性和聲級變化.研究發現，起落架噪聲的頻譜是由寬頻隨機噪聲與一些較為明顯的單音噪聲源組成，起落架噪聲的指向性類似於一個水平放置的偶極子.不同飛機起落架噪聲的聲級相差較大，這說明可以通過重新結構設計降低起落架噪聲。
  12. On the basis of increasing the flaw resolution of the x - ray radiographic system, the study is firstly concerned with the analysis made on the influence of such factors as redial sources energy, system noise, optics radiography and scattering on the radiographic system in theory, and the present dissertation looks at the methods for acquiring the radiographic system point sp read function, line spread function and module transfer function ( mtf ). on the basis of these studies, research the spread properties of the tiny flaw making use of mtf, acquiring the properties of system inspecting sensitivity and resolution, based on the system optimization designing

    本文以提高射線成像系統的疵病解析度為前提，首先在理論上對射線源能量、系統噪聲、光學成像、散射等各環節對成像系統的影響進行分析，探討成像系統的點擴展函數、線擴展函數及其調制傳遞函數（ moduletransferfunction ，簡稱mtf ）獲取方法，在此基礎上，利用mtf研究微小疵病的擴展特點，從而得到系統的檢測靈敏度和解析度給出關系特性，為系統優化設計提供依據。
  13. Owing to the anisotropic and the biharmonic nature of microwave radar backscatter on spaceborne scatterometer, and to the scatter model function nolinear and the existence of various noise sources in the measurements in addition to the model function, the retrieval wind results consist of as many as four wind directions

    由於衛星散射計探視雷達回波的各向異性的雙調和性質，同時由於散射物理模型函數的非線性及信號中存在噪聲，使得常規點方式風場反演中風向有多至4個解的多解存在。
  14. The self - - noise of underwater vehicles is one of the main interfere sources in sonar, which is compound of three kinds of noise inc1uding the machinery noise, the propel ler noi se and the water ki net ics noise

    航行體自噪聲是聲納的主要干擾源之一，它由航行體運動時產生的機械噪聲、螺旋槳噪聲和水動力噪聲幾部分構成。
  15. The machine has to be operated in an environment that is free from strong noise sources such as high - frequency welder

    同時應在不受高頻焊接機等強噪聲源影響的環境下使用。
  16. The major noise sources of low - speed railway vehicles ( v 200km / h ) running in domestic existing lines are wheel - rail rolling and structure noise

    我國既有線鐵路客車運行速度多在200km h以下，屬于低速運行。運行噪聲以輪軌噪聲和構造物噪聲為主。
  17. Therefore, this paper studies three kindsvalves such like bufferfly valve, brake valve and ball valve, with the numerical simulation method by cfx which is often used to simulate the fluid. by the simulation of three kinds of valves, we can kown dynamic characteristic of them. in this paper, i not only simulate for three kinds of valves, but also analyse cause of flow - noise and give respectively mathematical model of main noise sources in piping system such as pupm and valve

    本文通過cfx軟體，用數值模擬的方法，對海水管路系統中常見的三種閥門（蝶閥、閘閥、球閥）流動特性及噪聲進行了模擬分析，闡明閥門噪聲產生的機理，建立了泵和閥門等噪聲源的數學模型，並對管路系統中涉及到的邊界條件做了適當的處理，分析了閥門下游的渦聲。
  18. This will be dealt with in this paper. the discrimination for noise source from qn700 indicates : the fan noise ( 625hz ), the electromagnetism noise ( 962hz ) and the burning noise are the main noise sources

    對汽車燃油空氣加熱器中具有典型代表結構的qn700型樣機的測試分析表明：風扇噪聲（ 625hz ） 、電機噪聲（ 962hz ）和燃燒噪聲是加熱器的主要噪聲源。
  19. In modern microwave and millimeter wave communication systems, the low phase noise frequency sources have the key effects in the systems ’ performance. especially in the national defence, the effects are more obvious. so in this paper, a method to realize the low phase noise x - band frequency source has been proposed, designed, produced and tested

    在現代微波、毫米波通信系統中，低相噪頻率源對系統性能起著非常關鍵的作用，特別是在軍事國防上，這種關鍵的作用更加明顯，為此在本論文中，就如何實現x波段頻率源的低相噪性能，給出了一種設計方法並對其進行了實現。
  20. First, this paper systematically and entirely analyzes the hvac - related noise sources, and briefly presents the generating mechanisms of noise in some air - conditioning equipments, and illustrates the propagation of system noise in building interior

    首先，本文比較系統、全面地分析了hvac系統存在的噪聲源，並對部分空調設備的發聲機理進行了簡單地說明，同時還闡述了系統噪聲在建築內部的傳播。
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