繞射散射 的英文怎麼說

中文拼音 [ràoshèsǎnshè]
繞射散射 英文
diffraction scattering
  • 繞 : 繞名詞1. [書面語] （彎曲） bend2. （姓氏） a surname
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 散射 : [物理學] [電學] scattering; radio scattering; scatter; dispersion
  1. Since the problem of feature extraction from 2 - d radar data can be approached as a parametric modeling and parameter estimation problem, the 2 - d type - discriminated geometric theory of diffraction based ( td - gtd ) model that discriminate between the localized and distributed scattering centers of the target is presented

    在對目標散射中心的建模與參數估計中，提出採用更貼近散射機理的、特徵含量更為豐富的二維散射中心模型?區分局域性與展布式散射中心類型的幾何繞射理論（ td - gtd ）模型。
  2. In this paper, we do research about the nonideal scattering centers

    本文的研究圍繞各種非理想散射現象而展開。
  3. At present greco is regarded as one of the most valuable methods of radar cross section ( rcs ) computation in the high - frequency region. depending on these conditions, several researches have been completed in this paper : firstly, calculating rcs of complex conducting targets has been accomplished by greco method. the high - frequency rcs of targets are obtained through physical optics ( po ) and incremental length diffraction coefficients ( ildc ) respectively

    本論文做了以下研究工作：首先，實現了運用greco方法計算了高頻區理想導體復雜目標的雷達散射截面（ rcs ） ，分別應用了物理光學法（ po ）和增量長度繞射系數法（ ildc ）計算了目標的面元和棱邊的電磁散射，最後綜合面元與棱邊的散射效應得到目標的總rcs 。
  4. Abstract : the effects of airfoil geometric parameters on wing " s spacial and polarized scattering characteristics have been systematically revealed. the results of the study indicated that the calculating value of diffraction from trailing edge by using the formula of the straight wedge is very far from experimental results for vertical polarization, and the contribution of thickness of the trailing edge to scattering must be considered in the calculation. the scattering peak of leading edge depends only on radius of airfoil for horizontal polarization. but for vertical polarization, it depends on maximum thickness and the location of maximum thickness. engineering formulas for evaluating all scattering peaks were given in the paper. it is important for the design of low - rcs wing

    文摘:系統地揭示了翼形幾何參數對機翼的空間散射特性、極化散射特性的影響規律.研究發現，在垂直極化狀態下用理論尖劈公式計算機翼后緣繞射的計算結果與實驗結果相差甚遠.提出在垂直極化狀態下機翼后緣繞射的計算必須將后緣厚度考慮在內的見解.對於水平極化，前緣散射波峰只與前緣半徑有關；而對於垂直極化，前緣散射波峰與翼形最大厚度以及最大厚度位置有關.給出前後緣散射波峰的工程估算公式，為低雷達散射截面（ rcs ）機翼設計提供依據
  5. This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes

    本文採用edge - basedfem為基本方法，結合物理光學法（ po ） 、物理繞射理論（ ptd ） 、邊界積分方程（ bi ） 、區域分解技術（ ddm ）和完全匹配層（ pml ）吸收邊界條件等求解方法構成的混合方法，對電磁散射和輻射問題進行了研究，主要包括以下內容：提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法，並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。
  6. Electromagnetic simulation computation uses three principal scattering mechanisms, including facet contribution, edge diffraction and multi - scattering

    本文採用了鏡面反射、邊緣繞射以及多次反射這三種主要的散射源。
  7. Incremental length diffraction coefficients ( ildc ) is adopted to calculate the contribution of edge diffraction. in order to improve the accuracy of calculation, multi - scattering is discussed, based on the two former contributions and ray - tracing method. geometrical optics ( go ) and physical optics ( po ) are used to calculate the multi - reflection between facets and facets

    對于鏡面反射採用物理光學法計算其散射貢獻，結合基於面元的目標模型的表示，採用離散的積分形式，將面電流積分化簡為線積分，簡化計算復雜度；對于邊緣繞射，運用增量長度繞射系數理論計算目標邊緣繞射場；在多次反射中，則以光線跟蹤方法為基礎，採用幾何光學、物理光學相結合的方法分析考慮多次散射場。
  8. The land clutter is useless signals for target detection caused by land terrain. the multipath effect is some kind of interference which is caused by wave reflection on terrain. the diffraction effect is the phenomenon of wave propagation into shadow region

    地雜波是由地面散射引起的對目標探測無用的信號;多路徑是由電磁波在地面反射所引起的干涉;衍射則是電波繞射傳播到遮蔽區的現象。
  9. As surface waves propagate from deep to shallow water, the wave will take series of transformation including shoaling, refraction, diffraction, reflection, breaking and energy dissipation due to the effect of topography and various hydraulic structures

    波浪由深海向海岸傳播過程中，由於地形和水工建築物等因素的影響，將發生淺水變形、折射、繞射、反射、破碎以及能量耗散等波浪變形現象。
  10. Based on the concept of the rcs and the theory of the basic electromagnetic scattering, this dissertation discussed the application of the physical optics ( po ) to the rcs of bodies modeled with nurbs surfaces, and completed an integrate software with the display, transfer, shelter handling and modification of the models

    本文圍繞復雜目標雷達截面（ rcs ） rcs的概念及基本電磁散射理論，討論了基於nurbs曲面模型的物理光學法的應用，同時完成了集模型顯示、修改、變換、消隱及rcs計算於一體的綜合軟體開發。
  11. 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。
  12. And then a hybrid technique combining ddm with eb - fem, po, and ptd is given for the analysis of electromagnetic scattering by electrically large bodies with deep cavities

    在此基礎上，將ddm與eb一fem 、物理光學法、物理繞射理論相結合，分析了帶有深腔的電大尺寸三維導體目標的電磁散射特性。
  13. Rcs of facets of targets coated ram was resolved by combining impedance boundary condition ( ibc ) and geometric optics ( go ) and rcs of those edges were approximated by computing the rcs of edges of impedance wedge through method of equivalent currents

    其中，塗覆目標面元的散射場是通過結合阻抗邊界條件和幾何光學法（ go ）而得到；而塗覆目標棱邊的散射場則是通過等效電磁流法求解阻抗劈的邊緣繞射場近似得到的。
  14. An idea to establish a cancellation database on the basis of the smooth of rcs of the protected target is also introduced the field scattered by facets and fringes and the multiple scattering effect are calculated by a hybridization of the theory of physical optics, equivalent currents and areal projection - physical optics, which are utilized to compute the rcs of an aeroplane

    還提出了根據被保護目標rcs的平滑值確定對消數據庫的思想。應用物理光學法、等效電磁流法和區域投影物理光學方法計算了面元散射場、劈邊緣繞射場以及多次散射場，採用此方法計算了某飛機的rcs ，並對該目標的rcs進行了平滑處理。
  15. A two - dimensional microwave imaging system in x band with stepped frequency signal and real aperture antenna is established. two - dimensional super - resolution algorithm is applied in this system

    本文圍繞實孔徑微波成像系統，在提高系統的角度解析度、二維超分辨處理和基於強散射中心分佈的rcs數據壓縮等方面進行了研究。
  16. The patent covers the use of a computer - designed diffraction grating, a type of hologram that takes a single beam and breaks it up into an array of beams, each one of which forms an optical trap for particles of micron or nanometer dimensions

    此專利涵蓋了電腦設計的繞射光柵，以及可將單一光束分散成陣列光束的雷射全像術，其中每道光束都會形成光阱，可捕捉微米或奈米大小的粒子。
  17. Transmission line effects, such as reflection, dispersion and crosstalk, may cause the failure of circuit design

    傳輸線效應（反射、散射、串繞）可能導致整體電路設計的失敗。
  18. On the other hand, the multi - level fast mutipole algorithm ( mlfma ) which based on the integral equation method can obtain the result with great accuracy, but this method accounts in all the couplings between every sub - scatter objects, it needs much more to store all of the information, and because of the rigorous integral on the spectrum space the computational complexity is also enormous

    相對於一些傳統的方法如幾何光學方法，幾何繞射方法，彈跳射線方法有著更高的精度和更廣的適用范圍。但是由於其基於積分方程方法，需要對全局中所有的子散射體之間的相互耦合加以考慮，從而導致在求解電大尺寸目標的散射問題時需要巨大的存儲空間。同時由於其在譜域上嚴格積分導致計算量也很大。
  19. In the aspect of detection and high precision estimation of seafloor backscattering, algorithms of fast convergence of energy center and correlation of eigen - replica were developed. also studded were processing methods of weighted mean time ( wmt ) and bearing direction indicator ( bdi ) based on fft beam forming as well as high precision detection and estimation of time of arrival ( toa ) and direction of arrival ( doa ) using split beams phase difference detection technique

    圍繞海底反向散射信號的高精度檢測和估計技術，開發了快速能量中心收斂演算法和特徵模型相關演算法，研究了基於fft波束形成的加權時間平均與方位指示處理方法，並討論了利用分離波束相位差檢測技術的海底反向散射信號到達時間（ toa ）和到達方向（ doa ）的高精度檢測與估計方法。
  20. And when observers take a spectrum of the galaxy, the diffraction grating of the spectrograph disperses the light over a large area on the detector, rendering the signal even fainter at each wavelength

    而當觀測者擷取星系光譜時，光譜儀的繞射光柵會把光分散到偵測器上一個很大的?圍，導致每個波長上的訊號更加微弱。
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