散射系數 的英文怎麼說

中文拼音 [sǎnshèxìshǔ]
散射系數 英文
coefficient of scattering
  • 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） ...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 散射 : [物理學] [電學] scattering; radio scattering; scatter; dispersion
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Test method for side direction scattering coefficient of laser rods

    激光棒側向散射系數的測量方法
  2. Rayleigh scattering coefficient

    瑞利散射系數
  3. Mass scattering coefficient

    質量散射系數
  4. Backscattering coefficient b

    回散射系數
  5. Especially, the second part of the computing the backscattered field is given. 5

    在利用kirchhoff遠場近似方程計算後向散射系數時，給出了計算該公式第二部分的方法。
  6. Validation of the presented approach is verified through numerical simulations of radar measurements over the bare soil surfaces

    本研究以裸露土之土壤?度及其雷達散射系數的數值模擬來驗證此一方法之有效性。
  7. Optical tomography ( ot ) is an imaging modality with the near infrared light as sources for the optical parameters such as the scattering and absorption coefficients of tissues

    光學層析成像技術利用近紅外光作為探測光源，對生物組織的光學特性參數（如散射系數和吸收系數）進行成像。
  8. In addition, a shadowing function applicable to multiple scattering is taken into account, which extends the calculation to the surface with anisotropic slope distribution

    引入考慮多次散射的遮蔽函數來修正掠入射情況下的散射系數，並將計算范圍擴展到均方根料率各向異性的二維粗糙面。
  9. 4. based on the theory of kirchhoff approximating and the model of franceschetti facet field simulating, an algorithm for the computing the facet backscatter coefficients is presented

    4 .基於kirchhoff近似理論和franceschetti地面場景模擬模型，實現了一種根據小平面單元與sar之間的幾何關系計算小平面單元後向散射系數的演算法。
  10. 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
  11. Based on the vector radiative transfer theory and the characteristics of the sar technology, several sub - models for rice backscattering are constructed, including the leaf scattering model, the leaf extinction model, the trunk scattering model, the trunk extinction model and the water reflection model. then an integrated model for the first - order scattering mechanisms of rice, including all the main physical processes, is achieved

    針對合成孔徑雷達sar的技術特點，以水稻為研究對象，從矢量輻射傳輸理論vrt出發，通過模擬水稻主要器官稻葉和稻桿對電磁波的散射衰減作用等物理過程，建立了一套完整的水稻一次後向散射作用的物理模型，用以模擬水稻層的後向散射系數
  12. We, then, parameterized a semi - empirical model for the different land surface cover types. this semi - empirical model was applied to minimize the effects of the vegetation volume scattering and extinction in radar measurements

    此外，目前星載合成孔徑雷達如ers - 1 2 、 radarsat等均為單一頻率、單一極化的雷達，無法從得到的單參數雷達後向散射系數中直接提取地表土壤水分信息。
  13. This technique is mainly involved two steps : 1 ) vegetation effects correction : we used ndvi ( normalized difference vegetation index ) derived from tm and avhrr measurements for spatial and temporal variations of vegetation covers at different scales

    但由於電磁波與地表相互作用的復雜性，雷達後向散射系數除受地表介電常數（土壤水分）影響外，還受到地表粗糙度、土壤類型、植被覆蓋以及雷達入射角、頻率、極化等多種因素的影響。
  14. Using a simple radiative transfer model for vegetation volume scattering and the integral equation model ( ibm ) for surface scattering with the field in situ measurements as the input, we compared the simulated and sar measured backscattering coefficients in different agricultural fields

    特別是在植被覆蓋地表，對其下土壤水分的監測更帶有極大的困難性。因此，利用雷達後向散射系數反演土壤水分必須首先充分理解微波與地表的相互作用過程。
  15. 2 ) radar incidence angle and surface roughness correction : to make radar incidence correction and eliminate the surface roughness effects, a wide range of surface parameters ( soil moisture, surface rms height, correlation length, incidence angle ) was input to the ibm model to simulate the effect of surface roughness and radar incidence angle on the sensitivity of soil moisture to the radar backscattering coefficient. a simple model was established to simulate the effects of incidence angle and surface roughness. 3 ) establishment of soil moisture change inversion model : according to a modified ibm model simulation results, the bare surface backscattering coefficients can be expressed as a funtion of the dielectric component for a given surface roughness when the surface slope greater than 2. 0, which is valid for most nature surface : in above equation, r0 is the surface reflectivity at normal incidence

    本研究中，首先利用基於微波輻射傳輸方程的微波植被模型和積分方程（ iem ）模型模擬了各種地表土壤水分含量情況下，植被覆蓋、地表粗糙度（包括地表均方根高度和相關長度） 、雷達入射角對c波段（頻率4 . 7ghz ）水平極化（ hh ）雷達後向散射系數的影響，在此基礎上，建立模型消除了植被覆蓋、地表粗糙度、及雷達入射角對雷達後向散射的影響，利用多時相50m解析度radarsatscansar雷達後向散射系數圖像反演得到了地表土壤水分變化模式信息。
  16. With the plane wave representation of the green ' s function, the second - order scattered coefficients are divided into two components related to the coincidental waves and the anti - coincidental waves, which are dependent on the relationship between the single scattered field and its conjugate

    通過將格林函數做平面波展開的方法，二階散射系數分解成與同向波和反向波有關的兩部分，同向和反向分別是按單次散射場和其共軛場的耦合方式而劃分的兩種不同情況。
  17. This paper proposed a multizone and multidimensional radiation heat transfer model of g4135 diesel engine, including a combustion chamber space zone - model, a radiate temperature model, a radiate emission coefficient and an absorption coefficient model

    摘要對g4135直噴式柴油機建立了一個輻射多區多維模型，包括缸內工質的幾何空間模型、輻射溫度模型、輻射發射系數、吸收系數以及燃料油滴的散射系數模型。
  18. Based on the theory of kirchhoff approach and facet, the algorithm of computing the facets " backscatter coefficients is discussed. especially a method of computing part of the backscattered field is advanced

    基於kirchhoff近似理論和franceschetti的地面場景模擬模型，本文實現了根據小平面單元與sar之間的幾何關系計算小平面單元後向散射系數的演算法。
  19. In this study, we demonstrate a technique using the multi - temporal c band hh polarized radarsat scansar data to estimate the relative soil moisture change. the experiment data from sgp97 covered a whole range of vegetation growing season and different type agriculture fields

    研究證明，星載合成孔徑雷達（ sar ）得到的地表後向散射系數與地表介電常數有直接相關關系，從而能夠在水文模型要求的精度范圍內有效提取地表土壤水分信息。
  20. The relationship of the moisture content and radar scattering coefficient is built into the measurement equation, while the dry - up ( or wet - down ) of soil moisture in multi - temporal states was modeled into the process equation

    土壤濕度與雷達散射系數間的對映關系是以量測方程序來表示，而土壤濕度在時序上漸干或漸濕的狀態變化則以處理方程序來表示。
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