逆散射 的英文怎麼說

中文拼音 [nìsǎnshè]
逆散射 英文
back scatering
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 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
  • 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） ...
  • 散射 : [物理學] [電學] scattering; radio scattering; scatter; dispersion
  1. First introduces briefly the characteristic of microwave, the history of mamt, its characteristic and trends. then explains the contents of one port reflection parameters, the way to measure them and something to pay attention to. at the end we illustrates how to get the reversible two ports s matrix using eight - point method

    首先概述了微波的特點，接著介紹了微波自動測量技術的發展歷史、特點及其今後發展的趨勢，然後說明了二埠網路反射參量的內容、測定方法、需要注意的問題以及可逆二口網路散射參量的八點法測量，重點介紹了八點法圖解的方法。
  2. First, in virtual of identification of flaws is a typical of in - verse problems, proceeding from time - harmonic electromagnetic maxwell ' s equa - tion and helmholtz equation, the uniqueness and existence of direct scattering problems including the numerical algorithms of diverse of boundary conditions is given. second, the uniqueness and existence of inverse scattering problems and the theory of ill - posed integral equation are briefly looked back upon. finally, indicator function method for boundary identification is set up under all kinds of boundary conditions for inverse scattering of homogenous and inhomogenous objects, meanwhile, the proof of possibility for near - field measurements and nu - merical simulation are given

    由於缺陷的識別是一類典型的反問題，因而首先從時諧電磁maxwell方程和helmholz方程出發，具體地闡述了求解正散射問題的有關方法，包括各種（夾雜）邊界條件下的數值解法，就解的存在性唯一性給予了肯定的回答；隨后對逆散射問題的理論作了簡短的回顧，包括解的唯一性以及非線性不適定積分方程的處理等；然後對均勻介質和非均勻介質的逆散射問題建立了在各種邊界條件下的邊界識別的指示函數方法，鑒于近場數據獲得的重要性，對近場測試時邊界識別的方法給予了相應的證明，並且實現了數值模擬。
  3. The electromagnetic inverse scattering is one of most difficult problem due partly to its ill - posed, nonlinear and instablity nature

    由於逆散射問題的求解存在病態性、非唯一性以及不穩定性，這給它的求解帶來很大困難。
  4. Due to the fact that the problem of reconstructing image from compton scattering energy spectral data is an ill - posed problem, any error or noise in the measurements will be amplified in the reconstruction results

    由於從康普頓散射能譜直接求逆重建密度圖像是一個不適定性問題，測量的微小誤差會在重建結果中被放大。
  5. For two - spheres system, we present the concrete expression of the t matrix in such a system. and some numerical results obtained by this expression are compared well with experimental data

    在雙球粒子體系散射問題的研究中，用矩陣求逆的方法，具體地給出了雙球粒子體系散射傳輸矩陣的表達形式。
  6. Based on the backward propagation concept, we evaluated the feasibility of reconstructing the image of elastic wave sources and scatterers

    依據逆時傳播的觀念以評估重建彈性波源及散射體影像的可行性。
  7. Back - angle counter

    逆向散射粒子計數器
  8. From mathematical models for inverse scattering in two dimensional inho - mogenous media including variable impedance, all kinds of probable mixed variable impedance boundaries and cracks, from interior and exterior trans - mission problems and radiation condition, ill - posed integral equation and indicator function method are formulated for the diverse of boundary iden - tification. it is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solving it by virtual of regularity method, meanwhile, some numerical tests are given. 3

    在二維非均勻介質逆散射邊界識別的數學模型（包括一般的非均勻介質，正交各向異性介質，變阻抗介質，各種可能的混合變阻抗邊界問題）下，由內透射問題和外透射問題以及輻射條件，推導了上述介質的邊界識別的積分方程和指示函數方法，由於積分方程的核充分表徵了散射物的邊界，由此說明只要利用正則化方法求解該積分方程，就可以確定散射物的邊界。
  9. From mathematical models for inverse scattering in two dimensional homoge - nous media including dirichlet, neumann, robin, all kinds of probable mixed boundaries and cracks, direct and inverse scattering are discussed, and ill - posed integral equation and indicator function method are formulated for the diverse of boundary identification. it is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solv - ing it by virtual of regularity method, meanwhile, some numerical tests are given. 2

    在二維均勻介質逆散射各種邊界識別的數學模型（包括dirichlet ， neumann ， robin ，各種可能的混合邊界問題，裂紋問題）下，分別考慮了正散射問題和逆散射問題，推導了上述各種邊界識別的不適定積分方程以及指示函數方法，由於積分方程的核充分表徵了散射物的邊界，由此說明只要利用正則化方法求解該積分方程，就可以確定散射物的邊界，並給出了一些數值實驗。
  10. Moreover, the signal processing method of high range resolution based on inverse discrete fourier transform is analyzed. the synthetic high range resolution of the several scatters is simulated

    此外，本文還闡述了頻率步進信號的逆傅立葉變換合成距離高分辨的處理方法，並對多散射點目標的合成距離高分辨效果進行了計算機模擬。
  11. The relating to methods based on the research on international and domestic electromagnetic wave ( elastic wave, acoustic wave ) for the identification of flaws are all - round viewed

    本文對國際和國內基於電磁波（聲波，彈性波）逆散射理論研究缺陷識別的有關方法給予了全面的評述。
  12. Electromagnetic inverse scattering aims to reconstruct the distribution of the dielectric characteristics of unknown inhomogeneous dielectric object by scattering wave. in the near thirty years, it has been extensively used in military, medical imaging and nondestructive testing field

    電磁逆散射（又稱為電磁反演或電磁成像）是對接收到的未知物體的散射信號進行分析處理從而重建未知物體的幾何形狀和內部結構。
  13. The scattering characteristics of counterrotating propellers

    逆向轉動螺旋槳的散射特性分析
  14. Some variables regional distribution over south ningxia is given out in the course of evapotranspiration estimation : the regional distribution of surface characteristic parameters ( normalzed difference vegetation index, surface albedo, surface temperature ), radiation balance components ( surface absorbed shortwave radiation, surface longwave radiation, atmospheric counter radiation, net radiation ), surface heat and balance components ( soil heat flux, sensible heat flux, latent heat flux )

    估算區域蒸發（散）量的過程中，得到許多有意義的量：地表特徵參數（植被指數ndvi 、地表反射率、地表溫度） ；地表輻射平衡各量（地表短波吸收輻射、地表長波輻射、大氣逆輻射、地表凈輻射） ；地表熱量平衡各量（土壤熱通量、顯熱通量、潛熱通量） 。
  15. Under wide - aperture, the anisotropy of scattering centers become evidence, in this paper, we propose a new algorithm based on sub - aperture and filtered back - projection algorithm to estimate the anisotropy of scattering centers in wide - aperture imaging

    然後針對散射中心方向特性提取問題，結合子孔徑思想和濾波逆投影演算法提齣子孔徑濾波逆投影演算法，模擬結果驗證了演算法的有效性。
  16. Regularization method study in ultrasound inverse scattering imaging

    超聲逆散射成像問題中的正則化方法研究
  17. Microwave is the information carrier. both amplitude and phase of the measured scattering data can be used in microwave imaging

    微波成像是指以微波作為信息載體的一種成像手段，實質屬于電磁逆散射問題。
  18. In my artice, positive scattering problem is solved by fdtd method and inverse scattering problem is sovled by genetic algorithm ( ga ) ga is a kind of searching method which simulates the normal evolution. in the solution of inverse problem convergence speed is significent and parameter setting has much effect on it

    在採用遺傳演算法求解逆散射的問題時，收斂速度是非常重要的。不同的參數設置會影響到它的收斂速度和結果。因此參數的設置在遺傳演算法中有很重要的作用。
  19. This method is called microwave imaging technique based on rga under frequency domain. after comprehending the principle of the microwave imaging and rga, we present a novel imaging method for the first time. it is a full - time - domain algorithm based on rga, fdtd technique is applied to solve direct problem while the rga is applied to solve inverse problem

    在對微波成像的機理和實數遺傳演算法的工作機制有了初步了解之後，本文首次提出用時域遺傳演算法來求解導體目標的成像問題，即用時域有限差分法來求解散射問題，而逆散射問題還是採用實數遺傳演算法，得到了基於實數遺傳演算法的全時域的微波成像技術。
  20. ( 2 ) under hirota condition, by making use of the inverse scattering transform, the femtosecond dark n - soliton solution for the hirota equation is obtained, and the dark one - and two - soliton solutions are presented in explicit forms. interesting physical applications arise from the characteristics of the grey two - soliton solution

    （ 2 ）在hirota條件下，利用逆散射方法給出飛秒暗孤子解的表達形式，從中得到飛秒暗孤子間無相互作用的傳輸條件，並通過數值分析方法討論飛秒暗孤子的穩定性。
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