propagation difference 中文意思是什麼

propagation difference 解釋
傳播路程差
  • propagation : 持續培養
  • difference : n. 1. 差異，差別。2. 不和，爭論。3. 【數學】差，差額。4. 【邏輯學】特殊性。vt. 〈罕用語〉區別，使有差別。
  1. On the base, we designed the waveguides " structure and fabrication parameter. and in the design of symmetric y - branch of proton - exchange s ingle - y phase linbo3 modulaor, we used finite difference beam propagation method to analyze and compare the optical transmission loss of different s - bend y - branch

    本文對質子交換linbo _ 3單y相位調制器的重要部件y分支進行了深入的研究，比較了不同s彎曲形式的y分支過渡長度與損耗的關系，並計算出間距250 m時的最小彎曲長度。
  2. The calculated results show that, for low energy protons ( energy less than several decade mev ), the contribution of proton nuclear reaction to energy deposition can be neglected ; while for high energy protons ( energy greater than several hundred mev ), the great difference appears for the above two cases. this gives us an indication that the contribution of proton nuclear reaction to the energy deposition must be concerned for high - energy protons. the propagation process in material of thermal shock wave induced by high - energy intense - current pulsed proton beam irradiation is calculated for several different proton energies

    對于入射能注量為418 （ j cm ~ 2 ）脈沖寬度為0 . 1 s的矩形脈沖強流質子束，計算結果表明，由於質子束能量不同，引起的初始熱激波（ 0 . 1 s時刻的熱激波）有單峰結構，也有雙峰結構，不同能量的強流質子束引起的熱激波在傳播的過程中都會出現明顯的彈性前驅波。
  3. Based on the semi - vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer ( pml ) boundary condition

    摘要以柱坐標下的半矢量波動方程為基礎，採用基於完美匹配層（ pml ）邊界條件的有限差分方法，對彎曲波導進行模式求解，進而得到波導彎曲引起的輻射損耗。
  4. Three finite - difference methods, i. e., stagger grid, implicit and explicit algorithms, are analyzed in detail. multi - grid algorithm is firstly introduced in elastic wave simulation, to solve for the stability problem inherent in stagger grid and implicit algorithm, also for the efficiency problem inherent in explicit algorithm, and the precision, stability and efficiency for simulation of elastic wave arc increased by multi - grid method. phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation, based on phase delay and amplitude decaying features along wave propagation

    在水平分層介質接收函數的波形反演研究的基礎上，本文系統闡述了非均勻介質中彈性波傳播數值模擬常用的三種有限差分方法：顯式差分、隱式差分和交錯網格法，首次將多重網格演算法應用於彈性波方程的數值模擬問題，克服了交錯網格法和顯式差分法穩定性差，以及隱式差分法計算效率低的缺點，大大提高了彈性波數值模擬的精度、穩定性和計算效率。
  5. At first, the propagation and influence of stress wave on the top of the pipe pile were discussed in the paper and a formula was obtained about the time difference between two initial signals which were received from two different points

    本文首先研究了應力波在管樁頂面的傳播及其影響，並提出了計算不同點激勵速度峰值時間差的關系式。
  6. The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately. single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch

    本文先利用變分有效折射率法推導出滿足單模傳輸的脊形波導結構參數;接著介紹了有限差分束傳播法及求解的透明邊界條件，同時分析了將三維結構轉化為二維結構的有效折射率法，最後對y分支的特性進行了模擬。
  7. In this paper, the foundamental principles of fd _ bpm ( finite - difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced. then ， the theory of boundary condition is carefully presented. based on those theories mentioned above, a new kind of fd _ bpm arithmetic is brought forward. compared with the traditional arithmetic, this one has much more advantages. in virtue of the new arithmetic, author accomplished the whole simulating designs with two kinds of optical splitter ( stright y - junction optical splitter and sine - type optical splitter ), including propagation field simulating, vital parameter calculating, acquired some optimized waveguide parameters ， and finished the template by those results at last

    本文主要藉助這種改進的fd _ bpm演算法，對兩種結構的光分路器（直y型光分路器，上升正弦型光分路器）進行了器件設計的軟體模擬，包括對兩種結構光分路器傳輸場進行模擬，並對兩種結構光分路器的重要參數，如波導寬度，分叉角，縱橫比，損耗進行了模擬計算；得到了一些有價值的優化波導結構參數值，根據這些優化值設計製作了光刻模板。
  8. Integrated the monitoring data collected from the scene of blast with the correlative theory of earthquake wave, the blast vibration characteristic of this underground blast engineering and the influence that the blast vibration act on the ground buildings are analyzed. applied the method of duality linearity regression analysis, the propagation attenuational laws of blast earthquake wave in this underground engineering are gained by this software matlab. the analysis results indicat that the attenuational laws of blast earthquake wave are obvious diversity in the condition of difference distances

    結合採集到的大量爆破振動現場實測數據，並應用地震波的相關理論，分析了該地下工程開挖爆破的地面爆破振動特性及爆破振動對地面建（構）築物的影響;應用二元線性回歸分析法，通過matlab軟體計算得出該地下工程開挖爆破地震波的傳播衰減規律;分析結果表明，不同距離下的地面爆破地震波的衰減規律存在明顯的差異，近距離條件下爆破地震波的垂直方向分量衰減最慢，遠距離條件下垂直方向分量衰減最快，遠距離的爆破地震波的垂直方向分量和水平徑向分量的衰減指數均要比近距離相應的爆破地震波衰減指數要大。
  9. The back - propagation algorithm also rests on the idea of gradient descent, and so the only change in the analysis of weight modification concerns the difference between t and y

    反向傳播演算法同樣來源於梯度降落原理，在權系數調整分析中的唯一不同是涉及到t （ p ， n ）與y （ p ， n ）的差分。
  10. For example, we studied the influence of angle to the propagation efficiency of y - type embranchment and influence of calculation window size, selection of reference refractive index, the interval between dots, the difference of refractive index to the calculation of bpm

    例如： y分支的夾角對y型分支波導光傳輸效率的影響，參考折射率的選擇、計算窗口的大小、格點間距值、折射率差的變化對bpm計算精度的影響。
  11. Second, the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite - difference time - domain ( fdtd ) method. the curvature radius ; vicinity coupling ; transition loss and power attenuation of a s - shape bend waveguide have been analysed numerically by employing wide angle finite - difference beam propagation method ( fd - bpm ), as well as the coupling loss of optical fiber and waveguide. in addition, the framework of the s - shape waveguide laser has been

    其次，應用時域有限差分法，結合波導模式理論對條形與平面波導進行了模場模擬;應用廣角有限差分光束傳播法，對s形彎曲波導的曲率半徑、鄰近耦合、過渡損耗、功率衰減以及波導與光纖的各種耦合損耗進行了數值分析，並在此基礎上，對s形波導激光器的結構作了初步設計。
  12. The fresnel and franhufer diffraction patterns, of regular shapes screen such as slits, rectangular apertures, circle apertures, discs, triangle apertures, ronchi gratings, and some irregular shapes screen, are observed in the different propagation distance. this clearly gives the relation and difference of the two diffraction patterns

    具體分析了規則形狀如單縫、矩孔、圓孔、圓盤、三角孔、黑白光柵及一些不規則形狀等孔徑的菲涅耳衍射和夫瑯禾費衍射圖樣強度分佈，為深入理解菲涅耳衍射和夫瑯禾費衍射及其內在聯系與區別提供了理論依據。
  13. Finite difference method can deal with regular boundary conditions. in this paper, we discrete the water domain into rectangular meshes, and simulate the propagation, reflection and diffraction of water waves. we just specify waves source, the movement of water waves can be simulated automatically

    有限差分方法能夠處理具有規則邊界水域的水流現象，在本文中，我們把求解的水域離散成結構矩形網格，對水流的折射、反射、繞射等水流現象進行了動畫模擬，我們僅僅指定產生水流動畫的波源，水流動畫的細節均由數值方法產生，不需要人工的干預。
  14. ( 3 ) when locating continuously, speed location method in nlos environments ( 4 ) when locating continuously, single cell location method based on speed location in nlos environments. ( 5 ) when tracking, kalman tracking for mobile location in nlos situations based on displacement difference. each method was simulated, studied and compared in this dissertation. it was proved that these proposed arithmetic could mitigate nlos propagation errors effectively

    這種演算法具有對nlos誤差不敏感的特性（ 4 ）連續定位條件下，基於速度法的抗nlos單小區定位演算法（ 5 ）定位跟蹤條件下，基於位移差的卡爾曼濾波跟蹤演算法本文對每種演算法均進行了模擬研究和對比，驗證了它們在減輕nlos誤差上的可行性和有效性。
  15. At the same time this paper calculates the effect of train velocity on noise propagation, when mach number is 0. 1, sound velocity less effects on noise level ; when mach number is 0. 4, the difference value is about 2db whether to consider the sound velocity. so when the train velocity is not very high, the effect of sound velocity may not be considered

    本文同時計算了列車運行速度對噪聲傳播的影響，當馬赫數為0 . 1時，聲音的傳播速度對聲級的影響是很小的，當馬赫數為0 . 4時，考慮聲速與不考慮聲速影響的最大值的差值大約為2db左右，因此在列車速度不是很高的情況下可以不考慮聲速的影響。
  16. Trough the staggered - mesh finite difference simulations of the wave equations, simulated the propagation of the seismic wave and the relevant zero offset time record in the 2d viscoelastic random medium models

    摘要通過交錯網格有限差分正演，模擬了平面地震波在二維粘彈性隨機介質模型中的傳播及其自激自收時間記錄。
  17. This paper, through the staggered - mesh finite difference simulations of the wave equations, simulated the propagation of the seismic wave and relevant zero offset time record in the various transversely isotropic elastic random medium models

    摘要本文通過交錯網格有限差分正演，模擬了平面地震波在二維橫各向同性彈性隨機介質模型中的傳播及其自激自收時間記錄。
  18. Based on the shale code, the early code of ale, the two dimensional finite difference elastic - plastic flow code hepale has been developed, in which the ideal elastic - plastic model and equation of state of gruneisen are used to describe the solid material, the programmed burn technique is used to simulate the propagation of detonation, and the equation of state of jwl is used to describe the detonation products

    藉助于ale方法的早期程序shale的基本框架，開發研製了二維彈塑性流ale方法計算程序hepale 。程序包含用彈塑性本構模型和gr nrisen狀態方程來描述固體材料的行為；採用jwl狀態方程來描述爆轟產物的性質；採用程序燃燒法來模擬爆轟波陣面的傳播。
  19. Furthermore, good compression effectivity is presented in application to compression of pd gray intensity images. according to the research on difference degree between computational values of fractal features extracted from decoded pd images and that from original images, it is shown elementarily that the proposed method is effective for application in pd pattern auto - recognition system. ( 4 ) this paper brings forward pd pattern auto - recognition project based on the above recognition features and fractal compression of pd gray intensity images and designs the classifier with back - propagation neural network ( bpnn )

    （ 3 ）研究了局部放電灰度圖像的四叉樹分形圖像壓縮方法，通過模擬實驗證明採用本文演算法能夠獲得一定的圖像壓縮比，在局部放電灰度圖像壓縮應用中顯示了良好的壓縮效果，進一步研究了局部放電解碼圖像的識別結果與原始圖像之結果的差異程度，研究結果初步表明該方法應用於局部放電模式自動識別系統中是有效的； （ 4 ）研究了基於局部放電解碼圖像的bpnn識別方法及，通過分析對解碼圖像的識別效果，驗證了設計的系統模式識別方案的有效性，同時表明該方案能夠滿足實地局部放電模式自動識別和遠程數據通訊及自動識別的需要。
  20. Total 18 simulated acceleration time histories for intensity 6, 7, 8 and 9 are adopted as inputs, 6 typical retaining walls heights and 2 bridge abutments with difference are selected as the structural models of soil - structure system, the seismic responses of the system and the horizontal variation of the maximum response accelerations at different height levels are analyzed by means of a wave propagation finite element program

    選用針對地震烈度6 、 7 、 8 、 9合成的總共18條地震動時程，選取具有代表性的6個不同高度的擋土墻以及2個不同高度的橋臺模型，利用波動有限元法既有程序分析地震反應，研究水平地震加速度沿高度的分佈規律。
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