reflectivity 中文意思是什麼

reflectivity 解釋
反射比
  1. Second is reflectivity : issaacs double - streams approximating, eddington approximating, c - c double - streams approximating, - double - streams approximating and - eddington approximating is explained and used to calculate the reflectivity. at last, the two parameters is used in the above model to obtain the result

    其次是反射率:對幾種常用的二流近似, issaacs二流近似, eddington近似, c - c二流近似以及-二流近似和- eddington近似都作了介紹,然後我們利用二流近似對反射率進行計算求解。
  2. The prototype is made by a concave sphere primary and a plane secondary deposited the mo / si multilayer on the fused quartz substrates. the reflectivity peak and the reflectivity uniformity of the multilayer mirrors are respectively 25 % and around + 2. 5 % at 17. 1nm

    望遠鏡主鏡為球面,次鏡為平面,所用反射鏡為在熔石英基底上鍍制mo si多層膜的euv波段反射鏡,在17 . 1nm的反射率25 ,反射率的均勻性2 . 5 。
  3. E., the carrier frequency of a gaussian beam deviates from the resonant frequency of a fabry - perot etalon ), variations of the peak intensity, the position of the peak intensity and the dwdm systems, has received considerable attention. in this work, after taking into account the wavelength - depended reflectivity distribution profile of a fiber bragg grating, the oscillation wavelength # _ ( 1 ) of long external cavity fiber bragg grat

    與共振情況(即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率一致)相比,非共振條件(即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率存在偏差)一透射光束的峰值強度、峰值強度所對應的位置、以及光斑的大小隨入射角的變化都發生了顯著的改變。
  4. The quality of pearls is judged by the orient, which is the soft iridescence caused by the refraction of light by the layers of nacre, and lustre, the reflectivity and shine of the surface

    珍珠的價值主要由它的光澤顏色大小有無表面的缺陷和形狀來決定的,其中光澤為最重要的因素。其特有的光澤是光
  5. Research shows that absorption properties of composite powders are better than those of single absorber. the minimum reflectivity of 25 phr cb can decrease from - 10. 54db to - 28

    通過對復合粉體的吸波性能的研究,結果表明復合粉體的吸波性能優于單一吸波劑的吸波性能。
  6. Based on the fog drop size distribution model of radiation and advection fog, the backscattering characteristics of fog have been investigated and the empirical relations of the radar reflectivity factor and water content or visibility are obtained

    對霧的雷達後向散射特性進行了分析和研究,得到了平流霧和輻射霧的雷達反射因子與含水量和能見度的經驗關系。
  7. Surface treatments. anodized aluminium and aluminium alloys. measurement of total reflectivity using a photoelectric reflectometer

    表面處理.陽極氧化鋁和鋁合金.總反射率的測定.用光電反射系數計測量總反射系數
  8. Main conclusions drawn from the analyses of calculating results are as follows : ( 1 ) the microwave absorption of atmosphere gas have obvious attenuation at the wavelengths for cloud detection, thereinto, the water attenuation effect changes greatly, so the 94ghz cloud detecting radar should have water vapor attenuation correction scheme. ( 2 ) when 37ghz and 94ghz radars detect clouds, the difference between the atmosphere and cloud attenuation and the large variety of radar reflectivity conduce the intension of the radar backscatter signals change. ( 3 ) for the thin cloud layer and low water content of cloud, 37 - ghz radar backscatter signals are not as good as 94 - ghz radar, that is to say that the 94ghz radar has better capability in thin clouds detection

    本工作得出如下結論: ( 1 )大氣氣體的微波吸收在測雲波段產生明顯的衰減,其中水汽衰減效應變化很大;即將上天的空間94ghz測雲雷達必須有水汽衰減訂正方案; ( 2 ) 37ghz和94ghz雷達測雲,由於大氣和雲衰減不同和雷達反射率的很大差異,導致雷達回波信號強弱不同; ( 3 )對雲層較薄、含水量較少的雲,在不計雷達參數的情況下, 37ghz雷達回波信號不如94ghz測雲雷達,也就是說94ghz對薄雲有更強的探測能力;對雲層較厚、含水量大的雲,由於強衰減的作用, 94ghz雷達回波信號小於37ghz雷達; ( 4 )從大氣衰減的不利因素方面考慮,空間94ghz雷達測高層薄雲的效果最好;測低層薄雲時需要考慮氣體衰減訂正;因濃厚雲的強衰減作用,探測其中下部的能力大大減弱,不僅要進行衰減訂正,而且要藉助其他信息來反演整個雲層的含水量垂直分佈; ( 5 )為了獲得從極薄到極濃厚雲的垂直分佈探測能力,未來測雲雷達系統最好採用雙波長甚至三波長(如94 、 37和13ghz ) 。
  9. 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。
  10. Then we turned in the input laser to observe the decline of phase conjugate reflectivity. measuring dark storage time, we found that the phase conjugate reflectivity declined to 50 % of steady - state value when photorefractive crystal was in dark condition for 30 minutes. even after 9 hours, there still existed remaining reflectivity, which could n ' t be measured by our detector

    因而研究了晶體內位相共軛光柵存儲特性,即觀察位相共軛光柵形成后在黑暗條件下能存儲的時間,實驗結果得出位相共軛光柵在黑暗中30分鐘后,位相共軛反射率下降到原來的50 ,而在黑暗中9小時后,位相共軛光非常微弱,無法測出。
  11. The nature of stock news reflects it ' s own contradiction relationship, that is, the contradiction entia of the stock media " s active reflectivity and stock market " s material conditionally

    證券新聞的本質實際上反映出其內在的一種矛盾關系,是證券媒介的能動反映性和證券市場物質制約性的矛盾統一體。
  12. The quartenvave film stack based on one dimensional photonic crystal technology is designed. the measurement of the ir band is relatively mutual while that of mmw band is lack of report. the reflectivity of ir area ( 3 - 5 m ) by fourier transform infrared spectrometer ( ft - ir ) is given, and the experimental data of mmw band in microwave network analysis is also given

    本文給出了直接在傅立葉紅外光譜儀中進行的紅外波段透射率(實際是反射率)測量結果,在毫米波波段,通過自行設計的測試方法與測試系統,給出了在hp8510矢量網路分析儀下測得的未鍍膜、鍍膜樣品的比對測試結果。
  13. Also, a new type of prism is designed as folding mirror substituting for the plane mirror, in order to enhance the reflectivity

    提出一種基於布氏窗原理的新型低損耗轉折棱鏡的設計方案,以期替代目前使用的平面鍍金銅鏡以提高反射效率。
  14. In the reflected wave, the reflectivity of forbidden band lowers quickly with the extinction coefficient increment, when the extinction coefficient increases to 0. 05, there is already no obvious photonic bandgap

    得出:在反射波中,禁帶的反射率隨消光系數的增加而迅速降低,當消光系數增加到0 . 05時,已經不存在明顯的能帶。
  15. The experiment show that cr : sbn crystal has super characteristic of four - wave mixing to produce the phase - conjugate wave. we study the dependence of the phase - conjugate reflectivity of 1000ppm cr : sbn crystal on the parameters of incidence light such as light intensity ratio and the angle of incidence

    研究了摻雜量為500ppm的cr : sbn晶體的四波混頻相位共軛特性,發現該晶體的四波混頻特性不如摻雜量為1000ppm的cr : sbn晶體。
  16. The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses, in which phase conjugate reflectivity as high as 21. 5 % was obtained. when sppc were operated in ce : batio3 with 532nm, 632. 8nm and 790nm cw lasers, the maximum sppc reflectivity of 54. 1 %, 88. 2 % and 80. 5 % were obtained, respectively. unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths, both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments

    通過大量的實驗全面研究了ce : batio _ 3自泵浦位相共軛特性:在低重復頻率( 1hz ) 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率,而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ;實驗中發現在532nm 790nm波長范圍內,在不同的波長激光泵浦時,同時存在兩種自泵浦位相共軛機制:全內反射?四波混頻( tir - fwm )和受激背向散射?四波混頻( spb - fwm ) ;在連續激光泵浦時,對532nm 、 632 . 8nm和790nm三種波長,最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率;同時還研究了自泵浦位相共軛光的時間穩定性。
  17. The relationship between the incident angle and the self - pumped phase - conjugate ( sppc ) reflectivity in cu : knsbn is studied

    從實驗上觀察了不同摻雜量的cr : sbn晶體的四波混頻相位共軛特性。
  18. We firstly summarize the development of yb - doped fiber lasers, pumping methods and the applications of high - power fiber lasers. 2. considering the scattering loss, we deduce the relationships between laser performances of yb - doped double - clad fiber laser and parameters of laser cavity from the steady state rate equations, numerically analysis the changes of laser performances, such as laser power with the parameters of laser cavity, including output mirror reflectivity, optimum length of double clad fiber

    研究主要內容包括如下幾個方面:一、首先對摻鐿光纖及摻鐿光纖激光器的發展狀況、包層泵浦技術和高功率光纖激光器的應用等進行了綜述;二、在前人對高功率雙包層光纖激光器的理論基礎上,在考慮了光纖散射損耗因子的情況對光纖激光器理論進行了推導,給出了準解析解,進一步完善了理論分析。
  19. Firstly, the paper introduces briefly the detecting principle of microwave radiometer and the scheme of lunar microwave radiometer. based on propagation matrix, an algorithm to get reflectivity of layered medium is brought in. by means of the method, the reflectivity expression of two - layer medium is obtained

    本文首先簡要介紹了微波輻射計的探測原理及月球探測衛星微波輻射計的設計方案,還介紹了利用傳播矩陣計算分層媒質的反射率的方法,並給出雙層媒質的反射率表達式,分析了雙層媒質的反射率隨觀測角、頻率和第一層厚度的變化關系。
  20. Based on rain drop size distribution ( dsd ) data measured in qingdao, guangzhou and xinxiang, the radar reflectivity factor z for spherical rain drops, the radar reflectivity factor zh and differential reflectivity zdr for oblate ellipsoid rain drops have been calculated. the relation of reflectivity and rainfall rate for conventional meteorological radar and the relation of reflectivity, differential reflectivity and rainfall rate for multiparameter radar are regressed, the performance difference of two kinds of radar for measuring rainfall and difference for measuring rainfall in different regions are also discussed

    基於我國青島、廣州和新鄉地區雨滴尺寸分佈數據,計算了球形雨滴雷達反射因子,橢球形雨滴雷達水平極化反射因子和差分反射率,回歸給出了這些地區的常規氣象雷達反射因子與降雨率的經驗關系和多參數雷達水下極化雷達反射因子、差分反射率和降雨率關系,並對其測雨精度和地區差異進行了比較。
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