譜拉平 的英文怎麼說

中文拼音 [pǔlāpíng]
譜拉平 英文
spectral flattening
  • 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）...
  • 拉 : 拉構詞成分。
  • 平 : Ⅰ形容詞1 （沒有高低凹凸 不頃斜） flat; level; even; smooth 2 （高度相同; 不相上下） on the same l...
  • 拉平 : 1 （使有高有低的變成相等） flareout; bring to the same level; even up2 （指飛行時平穩降落的操作）...
  1. We believe the fine mechanical properties of tubular film are related to its fine chain orientation structure by using pole figure investigation and polarized fourier transform infrared ( ftir ) spectra analysis, the modes of orientation for flat and tubular films are obtained. it was found that the cellulose chains of the flat and tubular films have an uniplanar orientation mode with respect to the film surface

    通過x衍射織構（極圖）分析和偏振紅外光譜分析建立了平膜和管膜的取向模型：平膜和管膜都有單平面取向；平膜中的分子鏈在膜表面內呈無規取向:管膜中的分子鏈則相對于拉伸方向有明顯擇優取向。
  2. 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。
  3. 3. the frequency differences are determined by both the power spectral density ( psd ) and cepstrum of ambient vibration measurements. a matlab - based toolbox is developed, in which the differences of the higher adjacent frequencies can be easily evaluated

    3 .使用功率譜頻差法和倒頻譜頻差法，開發了基於matlab平臺的斜拉索環境振動基頻識別gui工具箱。
  4. I also carried some research on the bragg grating composed by alternate left - handed material and right - handed material. in the reflective spectrum of the bragg grating, there exists bragg top zone ( with reflectance almost 100 % ). however, i found that there exists some narrow transmission bands located in the bragg zone under some conditions

    另外，這篇論文里還要講到正負交替的材料組成的布拉格光柵也有很反常的現象，在光柵的反射譜上，我們不僅可以觀察到和傳統布拉格光柵相類似的布拉格平頂區，我們還可以看到在一定條件下，布拉格平頂區中會有一個很窄的反常透射區，也就是說只有很窄區域的波長可以透過光柵，而且中心波長是100 %透過。
  5. Prepared technical parameters were optimized by l9 ( 34 ) experiment analysis. a unique method for cleaning and drying of substrate - cleaning used by scour, drying used by infrared light was fished out by large numbers of experiment. chemical mechnism of zno thin film prepared by sol - gel technique was discussed by dta for the first time. by the measurements of sem, xrd and uvs, the thin film was analysed. the result proved that the thin film with strongly preferred orientation of c - axis perpendicular to the substrate surface which surface was homogenous, dense and crackfree was the crystalline phase of hexagonal wurtzite. the thin film was composed of plentiful asteroidal crystal which crystal dimension approximately 10 30nm. the average transmittance of thin film in visible region was above 90 %. the results of measurements else also proved that the thickness of single dip - coating was 75 240nm, this films resistivity was found to be 3. 105 102 3. 96 105 ? cm. the thickness and resistivity of thin film influenced by dope - content, withdrawal speed, pre - heat - treatment, anealing were reseached respectively

    利用xrd 、 sem以及uvs光譜儀等分析方法對薄膜進行了研究，結果顯示，所制備的薄膜為六方纖鋅礦型結構，具有高c軸擇優取向性；表面均勻、緻密，薄膜材料由許多星狀晶粒組成，晶粒尺寸大約為10 - 30nm左右；薄膜可見光透過率平均可達90 % ；對薄膜厚度以及電學性能進行了測定后發現：單次鍍膜厚度約為75 - 240nm ， al ~ （ 3 + ）離子摻雜型氧化鋅薄膜的電阻率在3 . 015 102 - 3 . 96 103 ? cm范圍內；分別研究了摻雜濃度、提拉速度、預燒溫度、退火溫度等工藝參數對薄膜厚度和電阻率的影響。
  6. Secondly, basing on the theory of on - off gain of small signal, the raman gain coefficient for frequency shift between 0. 5 and 20 thz of standard sigle mode optical fiber is measured by pump - probe method through a super luminescent diode ( sld ) as a broadband small signal probe source. thirdly, numerical simulation analysis of gain characteristic of raman fiber amplifier for c band wdm signal light is made according to the raman gain coefficient of the fiber measured before through target and four rank runge - kutta method. at the invariability of wavelength and maximum power of each of two pumps, schematic of powers of two pumps for best flatness on c band wdm optical gain was found out, at the same time, the factors of resulting in gain saturation is analyzed, too

    本文首先應用經典的電磁理論對拉曼光纖放大器的工作機制進行了分析，然後，根據小信號理論推導出的開關增益求出了光纖拉曼增益系數的表達式，採用泵浦-探測波的方法，利用超輻射激光二極體（ superluminescentdiode簡稱sld ）作為探測光源，測量了所用標準單模光纖頻移為0 . 5 - 20thz的拉曼增益系數，之後根據所測得的光纖的拉曼增益系數譜對應用該類光纖構成的放大c波段wdm光信號的拉曼光纖放大器的增益特性採用打靶法和四階龍格- - -庫塔進行了數值計算，在給定了兩個泵浦光源的波長和最大功率后，找出了反向泵浦情況下使c波段wdm光源增益最平坦的兩個泵浦的各自最佳功率，同時也分析了導致信號光飽和的原因。
  7. The technical breakthroughs in growth of nd : cngg had been made. in particular, continuous laser operation was achieved from nd : cngg pumped by ld. when the crystal wafer was end - pumped by one bar of ld with 807nm wavelength, the cw laser output power of 123. 1 mw was obtained with slope efficiency of 22. 3 %

    本論文用自動化熔體提拉技術成功生長出< 111 >方向的直徑25mm以上，長度80mm以上的平界面無核心nd : cngg單晶，確定了晶體結構和物相，測量了晶體的光譜性能，晶體消光比達到34db ，晶體生長技術有新的突破，實現了連續激光運轉，用單支807nm半導體激光二極體端面泵浦該晶體片子，在國內首次獲得123 . 1mw的1 . 062 m連續激光輸出，斜效率達22 . 3 % 。
  8. The method using the part imitate extract the continuous spectrum of the signal spectrum, than extract line - spectrum from the relatively flat line - spectrum by subtract it from the former spectrum

    該方法利用分段擬合方法擬合出信號功率譜的連續部分，從原始功率譜中減去連續譜得到拉平的線譜分佈，然後進行線譜特徵提取。
  9. Raman fiber amplifier （ rfa ） is a kind of optical amplifier that can amplify signal light directly through nonlinear interaction of high intensity pump and signal light in fiber. whereas the spectrum of raman gain coefficient of optical fiber is not flat, the gain of signal light with different wavelength induced by a single pump is rather different, when wavelength division multiplexing ( wdm ) signal light is amplified by a single pump, the gain spectrum of the wdm signal light is not flat. the flatness of the wdm signal light has important impact on the optical signal - to - noise ratio ( osnr )

    拉曼光纖放大器（ ramanfiberamplifier ，簡稱rfa ）利用高強度的泵浦光與信號光在光纖中的非線性相互作用實現信號光的直接放大，但是由於光纖的拉曼增益系數譜很不平坦，所以同一泵浦光源對不同波長信號光的增益就存在很大的差別，因此，用單泵浦光源來放大波分復用（ wavelengthdivisionmulti - plexing ，簡稱wdm ）信號光時，各信號光的增益值就有很大差異， wdm信號增益的平坦度對光信噪比（ opticalsignal - noiseratio ，簡稱osnr ）有重要影響。
  10. The run stm program includes the control of scanning signal, supervise and control the running state, set the scan range, set parameters, set and acquire the clock, collect and save the image signal, etc. image manipulation functions includes : on the space of the wipe of speckle, smooth image, blur, step sharp image, laplace sharp, and automatically adjust contrast, etc

    Stm運行程序包括掃描信號控制、運行狀態監控、設置運行參數，設置並獲得時基、圖像信號採集存取等等。圖像處理功能包括在空間域上的去斑、圖像平滑、模糊、圖像的梯度銳化、拉譜拉斯銳化，對比度自動調整等等功能，在頻域空間上完成數字圖像的傅立葉變換，並討論了理想高低通濾波。
  11. Ftir and xps proved that ptcda and tcpc were attached on the surface of silicon by covalent ; afm and uv - vis showed ptcda and tcpc arranged orderly on surface of silicon ; through raman spectrum, we found that macrocycle molecules stand on surface of silicon, while macrocycle molecules in film by vacuum deposition parallel to silicon surface

    紅外光譜和光電子能譜證明了?和酞菁成功的化學鍵合到單晶硅表面， afm和uv - vis吸收光譜表明了?和酞菁單層膜在硅基上呈有序排列。拉曼光譜的研究發現?酐分子大環以一定的角度立於硅基表面，而不是平行於基體表面，與蒸鍍手段得到的?酐膜的堆積形態完全不同。
  12. On the basis of the preferential sorption - capillary flow mechanism proposed by sourirajan, the membrane interfacial equilibrium condition in reverse osmosis can be simulated by the hplc experiment. the hplc data on retention times can be used for quantitatively characterizing the dynamic nature on solid polymer membrane surface and physicochemical properties of polymer - solution interface. the experimental technique in this paper can offer definite guidelines for the choice of appropriate membrane material and the better understanding of reverse osmosis separation mechanism

    本論文根據索里拉金（ sourirajan ）提出的「優先吸附?毛細孔流」機理作為選擇膜材料的理論依據，用高效液相色譜為手段，模擬反滲透實驗平衡條件，確定乙基纖維素固膜材料界面的動力學參數以及求得表徵高分子材料在溶液界面上的特性參數，為預測膜材料的化學性質和探討反滲透分離機理提供了有效手段。
  13. On the other hand the crosstalk of the wdm signal at fan - out of demultiplexer will increase with the power difference of the each channel. therefore, the gain of optical amplifier to wdm signal must have small ripple. one of the solutions is using two or more pumps with different wavelength and power according to the range of signal light to be amplified and raman gain coefficient of the fiber

    另外，各路信號光之間較大的功率差異會增加wdm通道解復用器輸出端的串話，所以光放大器對wdm各路信號光的增益要滿足一定的增益平坦度，解決該問題可以根據所要放大的wdm信號光的波長范圍和所用光纖的拉曼增益系數譜，採用多個不同波長和功率的泵浦光源進行泵浦。
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