雲中衰減 的英文怎麼說
中文拼音 [yúnzhōngshuāijiǎn]
雲中衰減
英文
cloud attenuation-
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 ） 。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。With the rising of gas cloud radius, the explosion pressure increases quickly during energy releasing period, and rapidly attenuates when the flammable gas burns up within gas cloud. ( 2 ) the larger the explosion heat is, the higher the maximum explosion pressure is. with the growing of explosion heat, the explosion pressure sharply increases during energy releasing period, and rapidly attenuates after the flame is distinguished within gas cloud
利用該程序計算了爆炸場參數，計算結果表明：氣雲半徑越大，爆炸最大壓力越大：氣雲半徑越大，氣雲區內部爆炸壓力在能量釋放過程中增加得越快，在能量釋放完畢以後衰減得也越快；爆熱越大，爆炸最大壓力越大；爆熱越大，氣雲區內部爆炸壓力在能量釋放過程中增加得越快，在能量釋放完畢以後衰減得也越快。This paper calculates the 94ghz and 37ghz attenuation in various model atmosphere by using liebe ' s algorithms, and also the microwave attenuation of cloud by using rayleigh ' s approximation
本工作中採用大氣對微波衰減的liebe演算法計算了多種模式大氣中94ghz和37ghz衰減（吸收） ，用rayleigh散射近似計算雲對微波的衰減。分享友人