點散射體 的英文怎麼說

中文拼音 [diǎnsǎnshètǐ]
點散射體 英文
point scatterer
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 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） ...
  • 體 : 體構詞成分。
  • 散射 : [物理學] [電學] scattering; radio scattering; scatter; dispersion
  1. The mett cross section applies to a point scatterer.

    莫脫截面適用於點散射體。
  2. The most obvious advantage is that because of their inability to scatter appreciably, nebular radio waves completely and genuinely delineate the distribution of nebular gas.

    因為星雲對射電波的散射很小，所以最明顯的優點就是能夠全面而真實地勾畫出星雲氣體分佈的外貌。
  3. Second, the imaging model built here has taken into account the tilt modulation, the hydrodynamic modulation, and current modulations of radar cross section. consequently, it has realized the imaging simulation of four kinds of wakes with the same imaging model. third, the orbital velocity of ocean wave was considered as the basic dynamic factor, and the imaging model calculates the influence on raw data by the wave m ovement according to the orbital velocity

    該模型的主要特點是： （ 1 ）它採用了三尺度復合表面模型的思想來計算海面的電磁散射，考慮了中等尺度波對紋波的進一步調製作用，彌補了傳統雙尺度模型的不足； （ 1 ）它考慮了海浪的傾斜調製作用、流體動力調製作用和流場對雷達截面的調製作用，實現了用統一的模擬模型對四種艦船尾跡特徵進行成像模擬； （ 3 ）它把海面長波的軌道速度作為基本的動態成分，並依此來考慮海面運動對sar回波信號的影響。
  4. To the influence of the plateau terrain, the impact of the elevation and the roughness of terrain to every energy component out and incoming are study, and basing the soil spectrum model proposed above, a new radiative transfer model of terrain area was put forwarded in which the soil water content, lai, terrain roughness and elevation were considered synchronously, and incoming scatter light was integral with the solid angle of semi - globe space defined by the slope of the pixel, so scattering lights of terrain and the sky are properly considered, but the operation is still within the acceptable range

    地形與反射率的關系是本文研究的一個重點。本文對崎嶇山地象元的各入射光和反（散）射光分量進行了深入分析，在所提出的濕潤土壤光譜模型和植被冠層模型的基礎之上進一步提出了新的適合青藏高原的山地輻射傳輸模型。該模型同時考慮了土壤含水量、植被覆蓋（ lai ） 、地形起伏和海拔高度的影響，並以象元坡面定義的半球空間立體角對環境入射光進行積分，使周圍地形和天空散射光均得到適當考慮，計算量又在可接受范圍內。
  5. Based on mono - pulse radar system and the analysis of terrain echoes, a geometrical model of air to ground ranging is constituted. by using the signals received from the sum and difference channels of terrain follow radar, a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained. according to the characteristics of the echoes, the theory and method of pass zero detection of difference channel and its applications are discussed in detail

    針對一維單脈沖雷達體制，分析了地形目標回波特性；建立了地形跟隨雷達空地測距的幾何關系；利用雷達收發信號，導出了地形跟隨雷達和差接收通道的回波信號表達式，進行了波形模擬，得到了地形跟隨雷達的地面散射產生回波在時域中的特性；根據和差回波特性，闡述了差信號過零點檢測測距的原理和方法及工程實踐中的應用，並給出了真實雷達對外輻射試驗的結果，驗證了文中的模擬。
  6. At last, we given several conceives for the follow - work, and hope to obtain more monodisperse standard samples which particle size is from 0. lum to 3um in the future, so we can find the relation between light scattering energy and energy jumpiness more accurately

    本文還對以後的工作提出幾點設想，希望獲得更多的單分散體系的、粒徑從0 . 1 m ~ （ 3 m ）得標準樣品，更準確地找到散射光能量與能量跳動量之間的關系。
  7. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  8. Because of the large advantage in the analysis of electromagnetic scattering and radiation problem, using the time domain integral equation ( tdie ) solving every structure of objects ’ scattering become to an important direction in computation electromagnetics, but the classical mot ( marching - on - in - time ) - based tdie solvers have a drawback : the late time stability problems

    由於時域積分方程對于分析電磁散射、輻射問題有著無可比擬的優勢，利用時域積分方程求解各種結構體目標散射成為計算電磁學領域中一個非常重要的方向。但是傳統的時間步進法求解時域積分方程存在致命缺點:后時穩定性不好。
  9. It ’ s very important to establish the obscuration ’ s model and analyze its influence to the laser propagation

    因此建立散射點的模型，分析散射點對光傳輸的影響對于建設高功率固體激光裝置具有非常積極的意義。
  10. The effect of obscuration can ’ t be ignored in the high - power solid laser equipment, and we have found the destruct of obscuration to the actual equipment

    高功率固體激光裝置中散射點的影響不可忽略，在實際的裝置中已經看到由散射點引起的破壞。
  11. On the other hand an object seen in reflected light will surely display some phase correlation between its various scattering points.

    反之，在反射光中看到的物體，它的各個散射點之間肯定將呈現某種位相相關性。
  12. ( 3 ) based on the theory of linear diffraction, the linear propagation of obscuration is analyzed through equivalent diffraction distances, fresnel parameter, and obscuration ’ s area percent by the optical propagation software

    用中國工程物理研究院研發的光傳輸軟體數值模擬驗證了散射點的衍射規律。三、從散射點線性理論基礎上分析散射點的傳輸規律。
  13. The radar cross section of grounded open cavities is computed by fem combined with boundary integral equation method. the cavities filled with complex materials are also analyzed. accurate results have been obtained

    應用eb - fem結合邊界積分方程對接地腔體的雷達散射面積進行了分析，討論了腔體內復雜介質填充情況對散射特性的影響，得到了比較精確的結果，討論了該混合方法在分析此類問題中的優缺點。
  14. Such conclusion is given : shorten the fresnel shu, shorten the obscuration ’ s area percent and shorten the equivalent diffraction distances will improve the optical quality. ( 4 ) the nonlinear paraxial equation is understood to analyze the n slabs ’ hot - image rule

    得出在高功率固體激光裝置中應縮小散射點的菲涅耳數和散射面積比，控制散射點的等效衍射距離，使散射點接近等效衍射距離為零，即像面的位置。
  15. According to the concept and basic form of svpsf, the cavity and duct scattering is examined, and a method is developed to remove the duct - induce dispersion effect

    推演了典型非點散射結構?腔體結構的二維svpdf的具體形式，得到消除其散焦效應的積分變換域濾波方法。
  16. The appearance position of hot - image satisfied the rule of z2 = z1 - lv, z2 is mean the image distance, z1 is mean the object distance, and lv is mean the distance between the nonlinear medium. the theory is also validated by the optical propagation software. if n = 1, then the nonlinear medium is only one, lv = 0, and it will satisfy the rule z2 = z1

    四、從非線性近軸波動方程基礎上用散射矩陣理論推導了級聯介質的熱像規律，得出級聯介質的熱像位置滿足z2 = z1 - lv ，其中z2為像距， z1為物距， lv為級聯介質間的距離，並用光傳輸軟體得到了驗證;發現級聯的非線性介質可以看成單一的非線性介質相連，散射點對級聯介質的每一段非線性介質成像;當只有一段非線性介質時，可以認為lv為零，滿足z2 = z1 。
  17. This work gives amsotropy surfaces of three collision systems he - hf, he - hcl, he - hbr. comparing theoretical results with experimental ones has carried out the discussion on feasibility of adapted potential model. all differential cross sections ( dcs ), partial wave cross sections ( pcs ) and total scattering cross sections ( tcs ) have been achieved by using close - coupling approximation method to calculate the three systems, and results above have also been discussed and analyzed

    首先，具體介紹了理論計算方法? ?密耦近似方法，接著討論了各種勢能模型的優缺點，利用孫桂華改進的勢能模型? ? ms勢，分別給出了he - hf 、 he - hcl 、 he - hbr三個碰撞體系的各向異性勢能面，並結合計算結果與實驗結果的比較，對所採用的勢能模型的可行性展開了討論；用密耦近似方法對he - hf 、 he - hcl和he - hbr三個碰撞體系進行計算，得出了各種微分散射截面、分波截面和總散射截面，並將計算結果進行討論和分析。
  18. Then the solving procedures of these bies by the rwg functions based moment method are elaborated, and the method of modeling complex objects built of arbitrary line, surface and volume structures is developed. in order to solve realize antenna and circuit problems, methods of adding excitations and concentrated loadings with moment method are deceloped, and matrix pencil ( mp ) method is used to deembeded the s prameters of antennas and circuits from the computed current distribution. some numerical results of practical complex antenna and scattering problems are presented to illustrate the veracity and effectiveness of the method

    在第一部分中，首先從電磁場的基本理論出發，基於等效原理和邊界條件以統一的方法建立了用於分析金屬、介質及金屬與介質混合結構的邊界積分方程，並歸納和比較了各類積分的適用范圍和優缺點;在此基礎上，給出了使用基於rwg函數的矩量法求解各種邊界積分方程的一般過程;研究了具有任意線、面、體組成的復雜結構的電磁建模方法，並給出了各種多面連接情況下基函數和未知量的選取方法;研究了使用矩量法分析電路、天線問題時集總元件和激勵源的處理方法，並基於矩陣束方法（ matrixpencilmethod ）提取了電路和天線問題的s參數;最後通過分析一些工程中的復雜金屬天線問題和具有「金屬與介質混合結構」的散射和天線問題驗證了方法的準確性和高效性。
  19. By studying the luminescence mechanism and the optical spectra, the two reasons for the diminish of light yield are given : the absorption of the fluorescence by the point defects when that produced and the scatter of the fluorescence by the macroscopic defects when that transmitting. in ce : yap scintillators, the available approach to improve the light yield is to diminish the self - absorption of the point defects

    通過光譜分析和對發光機制的研究，指出在產生熒光輻射過程時晶體中的點缺陷對熒光的吸收以及熒光收集過程中宏觀缺陷對熒光的散射是造成晶體光產額減小的原因，通過減小晶格缺陷是提高晶體光產額的有效途徑。
  20. It is emphasis how to calculate three - dimensional radar cross section ( rcs ) by the fma because of its superiority. the universal program has been accomplished by the fma, which may calculate the radar cross section of all kinds of shapes three - dimensional conducting bodies

    由於快速多極子法分析三維物體電磁散射的優越性，本文重點研究了如何用快速多極子法求三維導體的散射截面，利用快速多極子法編出了能夠計算三維導體單站散射截面的通用程序。
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