譜線密度 的英文怎麼說

中文拼音 [pǔxiànmìdù]
譜線密度 英文
power density
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  1. We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna. then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys. through the analysis we got the system ' s connatural characteristic, the amplitude - frequency characteristic of harmonic response, the power spectrum density of random vibration response, the maximal amplitude and resuming time of impact response

    其次藉助ansys有限元分析軟體，對系統進行了模態分析和動力學響應分析，獲得了不同天線結構參數下的衛星?天線系統的固有特性，簡諧響應的幅頻特性，隨機振動響應的功率譜密度，以及沖擊響應的最大幅值和恢復時間等。
  2. The spectrum of a galaxy contains bright and dark lines that are determined by the galaxy ' s temperature, density, and chemical composition

    一個星系的光譜中包含亮與暗的線，這是由星系的溫度、密度和化學成分決定的。
  3. As explained by the following figure, gas in low pressure and low density will alter the light that passes through it. it is because the gas will absorb light at some particular wavelengths and re - radiate it in random directions. thus, after passing through the low pressure gas, the spectrum of the original white light will have dark lines, called

    並不是所有光譜都是黑體輻射光譜，如下圖所示，低壓下的低密度氣體會改變通過它們的光線，這是由於氣體會吸收特定波長的光波並隨機向不同方向把所吸收的光線輻射出來，結果光線在通過低壓氣體后，原本的光譜上會出現很多稱為
  4. With the nonlinearity of vehicle suspension, simulation signal of suspension system is more practical by road exciting signal of time domain than frequency domain, furthermore, it is easy to get the results which are consistent with practical results

    考慮到車輛的非線性因素，在進行主動控制分析過程中，懸架系統激勵信號採用時域信號。因此，首先進行了時域路面隨機不平度生成方法的研究，所得路面模型的功率譜密度與理論路面功率譜密度吻合較好。
  5. Plastics used for food container and package - part 2 : determination of phenolic antioxidants and erucamide slip additives in linear low - density polypropylene - liquid chromatography

    食品容器包裝用塑料原料.第2部分:線性低密度聚乙烯中酚類抗氧劑和芥酰胺爽滑劑的測定方法.液相色譜法
  6. Scattered ions from the au foil passing through the q3d magnetic spectrometer, recoiled au ions were deflected, pure ions with single energy and single linear energy transfer were obtained

    經過q3d磁譜儀的磁偏轉，去掉反沖au離子和其它雜散粒子，得到具有單一線傳能密度（ let ）值的離子。
  7. 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。
  8. In this experiment, a neodymium glass laser is used to study the effects of the operating voltage, power density, the height from the observed location of the plasma to the surface of the sample, the location of the sample, the gas composition and the pressure on the intensity and quality of the spectrum

    本文採用高能量釹玻璃激光器，研究了激光器工作電壓、功率密度、等離子體的觀測高度、樣品位置、環境氣體及氣壓對等離子體的譜線強度及譜線質量的影響，獲得了最佳的實驗條件，並測量了金屬分析樣品中某些元素的含量。
  9. Using the multi - cloud model to fit the ha - spectra data of the april 27, 1981 post flare loop, we obtained the spacial distributions of the four physical parameters in the space of the post flare loop : the line - of - sight velocity v the excitation temperature tex, the micro - turbulence velocity vt and the column number density of the hydrogen atoms at the second level along the line - of - sight direction fields n2

    我們利用多雲模型處理了1981年4月27日太陽西邊緣耀斑后環的三個時段的h光譜掃描資料。通過對1000餘條對稱譜線和不對稱譜線的計算，我們得到了該耀斑后環各個時段在空間上的視向速度場，激發溫度場，視向上處于第二能態的氫原子柱密度場以及湍流速度場。
  10. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果，分析討論了衛星通信中的各種恆包絡調制技術，對它們的調制原理，相位路徑，已調波包絡，功率譜密度，誤碼性能，以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  11. The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field, with the help of the properties of trace functions, and that of p - polynomials, as well as the permutation theory over finite field : the new definition of chrestenson linear spectrum is given and the relation between the new chrestenson linear spectrum and the chrestenson cyclic spectrum is presented, followed by the inverse formula of logical function over finite field ; the distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested, which leads to the conception of the extended affine functions over finite field, whose cryptographic properties is similar to that of the affine functions over field gf ( 2 ) and prime field fp ; the relationship between the degeneration of logical functions and the linear structures, the degeneration of logical functions and the support of chrestenson spectrum, as well as the relation between the nonlinearity and the linear structures are discussed ; using the relation of the logical functions over finite field and the vector logical functions over its prime field, we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized bent functions over its prime field ; the existence or not of the perfect nonlinear functions with any variables over any finite fields is offered, and some methods are proposed to construct the perfect nonlinear functions by using the balanced p - polynomials over finite field

    重新定義了有限域上邏輯函數的chrestenson線性譜，考察了新定義的chrestenson線性譜和原來的chrestenson循環譜的關系，並利用一組對偶基給出了有限域上邏輯函數的反演公式；給出了有限域上隨機變量聯合分佈的分解式，並利用隨機變量聯合分佈的分解式對有限域上邏輯函數的密碼性質進行了研究；給出了有限域上邏輯函數與相應素域上向量邏輯函數的關系，探討了它們之間密碼性質的聯系，如平衡性，相關免疫性，擴散性，線性結構以及非線性度等；討論了有限域上邏輯函數各類線性結構之間的關系，並給出了任意點都是線性結構的邏輯函數的全部構造，由此引出了有限域上的「泛仿射函數」的概念；考察了有限域上邏輯函數的退化性與線性結構的關系、退化性與chrestenson譜支集的關系；給出了有限域邏輯函數非線性度的定義，利用有限域上邏輯函數的非線性度與相應素域上向量邏輯函數非線性度的關系，考察了有限域上邏輯函數的非線性度與線性結構的關系；利用有限域上邏輯函數與相信息工程大學博士學位論文應素域上向量邏輯函數的關系，揭示了有限域上的廣義bent函數與相應素域上的廣義bent函數的關系，以及有限域上的完全非線性函數與相應素域上向量廣義bent函數之間的關系;給出了任意有限域上任意。
  12. How improving the capability of ict has become more and more an important task, for example, improving spatial resolution and density resolution, reducing scan time, enlarging the size of measure space, improving image quality, etc. moreover the question of the energy spectrum hardening and the photon scattering is one of important bottleneck to restrict the improvement of ict

    如何提高工業ct的性能指標，如怎樣進一步提高空間解析度、密度解析度，減少掃描時間，增大可測工件尺寸，改善圖像質量等等成為了ct界面臨的重要任務。而其中射線的能譜硬化和散射問題，又是制約工業ct各項性能指標提高的重要瓶頸之一。
  13. In the first session the fans vibration on - line monitoring system is realized with vc language, also compile auto power spectrum density function, cross power spectrum density function, autocorrelation function and cross correlation function etc spectral analysis function to carry through simple offline fault diagnosis

    首先用穩定性強、擴展性好的vc + +語言開發了通風機振動在線監測系統，並編寫了自功率譜密度函數、互功率譜密度函數、自相關函數和互相關函數等頻譜分析函數來進行簡單的離線故障診斷。
  14. The response curve of rear left hydraulic mount, rear right hydraulic mount, and the fore rubber mount in each conditions are draught. the curve of hydraulic mount system ' s transmissibility is also calculated in the end and the performance of vibration isolation is analyzed. 5

    繪制了在時域和頻域上的動力總成的加速度運動響應，質心的角加速度運動響應以及后左，后右液壓懸置，前橡膠懸置的動反力曲線，以及怠速，高速工況下各懸置的加速度功率譜密度曲線。
  15. Cid - icp - aes has the advantages of high sensitivity, high signal - to - noise and high quantum efficiency, which nearly reaches theoretical limit value of theoretical parts of an apparatus ; it can memorize thousands of spectra lines at the same time. cid - icp - aes is the newest model, and there are still few articles to report analytical character of this type, as this result the optimum of operating condition and the effect of analytical parameters for photometric precision, signal - to - noise and detection limits are studied : r. f. power is 11 sow, nebulizer pressure is 28psi, the measurement time is 3 times and the integral time is 20s

    本實驗室的光譜儀是當前最新型號的全譜直讀光譜儀，這類新型裝置分析性能的研究報道較少，因此研究著重分析了參數對測量精密度、線背比及檢出限的影響，對儀器最佳操作條件進行了摘要優化：發射功率採用1150w ；載氣壓力為28psi ，測量次數選擇3次，積分時間為205 。
  16. In the radioactivity measure of the environment samples, hpge - spectrometer can expediently analyze the species and content of the radionuclide in the environment samples. those demands the detection efficiency corresponding to the different energy y - ray in the various environment samples

    在放射性測量中，採用高純鍺譜儀可以方便地分析環境樣品中放射性核素的種類和含量，但要準確地分析核素含量，需要準確知道各樣品中的各種能量射線的探測效率，通常由一定密度和樣品量的標準樣品來得到這一效率。
  17. Firstly the phase is extracted from interferogram by filtering and displacing frequency spectrum. then the wavefront and the line integral density are recovered by using fft or polynomial fitting method. lastly the radial local density distribution is calculated from the fitting curve of line integral density by the abel inversion

    首先對干涉圖進行頻譜濾波，用頻譜移頻法從干涉圖中提取相位，然後用快速傅立葉變換或多項式擬合實現波面重建，計算線積分密度，再利用abel積分變換從線積分密度的擬合曲線中反演徑向體密度分佈。
  18. First, the methods and procedures of general three orders nonlinear identification are summarized and the results are frequency functions described by basic and high order spectral density functions and frequency response functions

    首先，系統總結了使用一般三階非線性模型辨識的方法和步驟。得到的結果是用基本的和高階的譜密度函數以及基本的和高階的頻率響應函數表示的頻率函數。
  19. Test method for determination of phenolic antioxidants and erucamide slip additives in linear low density polyethylene using liquid chromatography

    用液相色譜法測定線性低密度聚乙烯中酚醛阻氧化劑和erucamide潤滑添加劑的方法
  20. Spread spectrum technique, which can handle variable adverse environments, exhibits unique qualities that have a number of advantages in anti - jamming, anti - noise, reduction of multi - path interference, low power spectral density, privacy, selective addressing and code division multiplexing

    擴頻通信技術具有優越的抗干擾、抗噪音、抗多徑衰落性能，能在低功率譜密度下工作，具保密性、可多址復用和任意選址，能有效克服各種惡劣的通道特性，目前廣泛應用於移動通信、雷達、導航、測距、電力線通信等領域。
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