雷達反響 的英文怎麼說

中文拼音 [léidáfǎnxiǎng]
雷達反響 英文
angel
  • 雷 : 1. （雲層放電時發出的響聲） thunder 2. （軍事上用的爆炸武器） mine 3. （姓氏） a surname
  • 達 : Ⅰ動詞1 （暢通） extend 2 （達到） reach; attain; amount to 3 （通曉; 明白） understand thoroughly...
  • 反 : Ⅰ名詞1 （方向相背） reverse side 2 （造反） rebellion 3 （指反革命、反動派） counterrevolutionari...
  • 雷達 : [訊] radar （縮自 radio detection and ranging）
  1. As for a space - based cloud radar, the change of the radar reflectivity n and the change of attenuation rate along with the cloud liquid water content have been compared between 37 ghz and 94ghz. the transmittance t of single level cloud for different heights and liquid water content has also been calculated at 2 frequencies. by defining a = n tr, which combines both effects of radar reflectivity and transmittance, we have examined the values of a at 37ghz and 94ghz for high, middle and low cloud liquid water contents

    對空間測雲雷達，討論了37ghz和94ghz這兩個頻率的雷達反射率和衰減系數隨雲液水含量的變化；計算了不同高度的單層雲在不同頻率，不同含水量情況下的雲層透過率_ ；定義a = _來綜合考慮雷達反射率和透過率對空間測雲雷達回波的影響，分析比較了雲含水量高、中、低時37ghz和94ghz的a值大小。
  2. 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
  3. When low elevation targets arc tracked using the monopulse radar, the multipath effects including the specular reflect and diffuse reflect degrade severely the tracking performance

    雷達跟蹤海面低空目標時，由鏡面反射和漫反射引起的多徑誤差嚴重影響雷達的跟蹤性能。
  4. The conclusions from this research include : ( 1 ) the real part mainly effects the delay time between two peaks of gpr signal, the larger the real part, the longer the delay time. ( 2 ) the imaginary part mainly affects the peak amplitude of gpr waveform except that from pavement surface, the higher the imaginary part, the lower the peak amplitude. ( 3 ) the neglect of imaginary part of dielectric will increase the analyzing error obviously when it is higher

    分析了路面結構層材料介電常數實部和虛部對雷達電磁波反射信號的影響，並得出以下結論： （ 1 ）介電常數的實部主要影響雷達反射波的時延，實部越大，時延越長； （ 2 ）虛部主要影響除路表反射波幅之外的其它結構層界面的反射波波幅，虛部越大，反射波幅越小； （ 3 ）當介質介電常數虛部較大時，忽略虛部將給分析結果帶來明顯的誤差； 3
  5. Solicitor clive burton, who has handled numerous traffic offence cases, said : " i would urge everyone to demand the photographic evidence. there are, i ' m afraid, some quite unreliable devices around.

    法律顧問克萊夫伯頓，曾經經手過無數交通刑事案件，他說：我極力要求每一位被開超速罰單的人都去查看照片，在那裡，我恐怕，有相當不可靠的設備影響到雷達波的反射。
  6. 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。
  7. Angle measuring precision phase sum / difference mono - pulse radar receiver is not only related to accurate strike to target, but also the base of successful penetration of interceptor missile for tbm anti - guidance system using two point sources of correlation, which is one of radar angle fraud technologies. thus, research on technical criteria influencing angle measuring precision of receiver is meaningful

    相位和差單脈沖雷達接收機的測角精度，不僅關繫到是否能精確地打擊目標，而且是tbm反制導系統利用相干兩點源雷達角欺騙技術，成功突防攔截導彈的基礎，所以對影響測角精度的接收機各項技術指標進行研究具有重要意義。
  8. The first guess spectrum, the wind data necessary for deriving the guess spectrum, the pre - processing of sar images and the influence of the radar channels, which are involved in the retrieval, are discussed

    對反演涉及的猜測譜問題，猜測譜涉及的風場數據問題， sar圖像預處理問題以及雷達波段的影響問題進行了探討。並對orsi - sar - ow軟體進行了升級。
  9. This thesis pass through the laser delimitation instrument and the geological radar instrument means, to tunnel initial stages support and secondary structure. at past the research of tunnel lining thickness depend on opening dig figure, don " t consider the effect of tunnel lining inner figure. adopting the integrate method of the laser delimitation instrument and the geological radar could most exact reflect the change rule of tunnel lining thickness, but also could do lots unbroken examination, have very important for summing - up the rule of tunnel lining thickness change, and have very amplitude extend value

    本文通過激光限界儀和地質雷達綜合方法，對新建高速公路隧道初期支護和二次襯砌混凝土內輪廓和厚度進行了檢測，對襯砌厚度的分佈規律以往的研究中，多以開挖和襯砌的輪廓變化為依據，並未考慮襯砌內輪廓的影響，而採用激光斷面輪廓限界儀和地質雷達綜合方法能較為準確的反應襯砌厚度的變化規律，並且能夠無破損的做大量的檢測工作，為總結混凝土厚度的規律有很大作用，並有極大的推廣價值。
  10. Because of radio wave propagating along the ducts with enhanced fields on the order of the free - space field, the problems of the co - channel interference are more complicate for communication systems with the results of intersystem interference and the formation of other system, and therefore affecting the determination of the coordination distances or the optimization of the distribution and separation of delay, and for surveillance system such as radar system the problems can be radar holes or the extensions of detect range

    對于通信電路，它使系統間的相互干擾問題變得復雜，既可能幹擾其他系統又可能形成另外的系統，從而影響系統的有關參數如中繼電路的最佳組合（分佈、間隔）和協調距離，對于探測系統產生的則是雷達空洞、超視距探測等問題。這些問題對相關無線電系統特別是軍事應用系統可能是致命的，因而以波導傳播為代表的反常傳播特性研究受到極大重視。
  11. ( 4 ) influence on reflected wave of the moisture of surface, base and subgrade and voids of asphalt surface is analyzed and characteristic waves are simulated to offer reference to analyzing actual wave

    （ 4 ）對路面面層、基層和地基的含水量以及瀝青層空隙率對雷達反射波的影響進行分析，並對其特徵波形進行模擬，為分析處理實際波形提供參考。
  12. The far - distance targets can be detected with the aid of the satellite image and the ample respond time of the defensive system can be provided ; the cryptic cruise missile and anti - radiation cruise missile can be effectively detected and tracked recur to the infrared image. radar is widely used in the cruise missile defensive system. the radar in the sky can detect the further flying cruise missile, ground based radar and coastal defense radar can track and help weapons system aim at the oncoming force cruise missile

    在目前情況下，衛星圖像、紅外圖像以及雷達成像在探測、跟蹤、識別、打擊巡航導彈目標方面具有相當大的優勢，藉助于衛星圖像可以在遠距離發現目標，能夠為防禦系統提供比較充足的響應時間；藉助于紅外圖像可以有效對付隱身巡航導彈和反輻射巡航導彈；雷達是在巡航導彈防禦系統中使用最多的設備，空基雷達能夠探測離防區比較遠的巡航導彈，陸基雷達和海基雷達能夠跟蹤巡航導彈，並可協助武器系統瞄準來襲巡航導彈，尤其是雷達陣在巡航導彈防禦中更是可以發揮重要作用。
  13. ( 2 ) if not considering blind space and targets are uniformly distributed, detectionperformance are close for the three kinds of line when speed - ratio is less than 1, and cross - toline will achieve higher enter - cover - probability when speed - ratio is more than 1. if takingblind space into account, for case of balance - beam radar, cross - away line can get higherstrict - enter - cover - probability. but for fear that probablely - enter - cover target distribution comesbehind the patrol line, the three factors should be limited if taking cross line

    若考慮盲區的影響，對平衡木構型的雷達而言，交叉同向航線的嚴格覆蓋率較大;但為了使區域縱深不反向至我方空域，採用交叉航線時航線橫比、航線縱比、速度比的取值范圍要受到限制，否則雷達動態性能將大打折扣。
  14. The polarimetric information in the target scattering signal has great potential on target detection, enhancement, filtering and recognition. some novel techniques can be proffered for detecting concealed targets, weakening the influences of adverse em environments, confronting active jamming and recognizing targets. basic theory of radar polarization is studied firstly

    雷達目標散射信號中的極化信息在目標檢測、增強、濾波及識別中有著巨大的應用潛力，為雷達系統在反隱身、削弱惡劣電磁環境的影響、對抗有源干擾和識別目標等方面提供了新的技術途徑。
  15. The main works and results are as follows : 1. by use of one order multiple scattering theory, light scattering and reflection by a single coating layer is analyzed. the variance of radiation intensity, bidirectional reflection distribution function ( brdf ) and laser radar scattering cross section with coating layer parameters is given, with the effect of rough contrast on bidirectional reflection distribution function

    本文主要研究了單層和多層塗層結構介質的光散射特性，以及近場條件下復雜目標對激光波束的散射，其主要工作如下： 1 、採用一階多重散射近似理論分析單層塗層對光波的散射和反射，計算並討論了輻射強度、雙向反射分佈函數和單位面積激光雷達散射截面隨塗層結構參數的變化規律，數值分析了粗糙基底對雙向反射分佈函數的影響。
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