cloud detection造句
例句與造句
- Cloud detection and analysis of modis image
圖象的云檢測及分析 - Cloud detection radar
測云雷達 - Experimental results showed that the method can get a higher precision for cloud detection
試驗結(jié)果表明，該方法能夠取得較高的云檢測精度。 - This paper presents two methods for cloud detection : multi - channel dynamical threshold algorithm and apparent reflectance algorithm
本文介紹了兩種云檢測算法：雙通道動態(tài)閾值法和表觀反射率法。 - Finally , the modis cloud detection results are used as validation for both algorithms tested with gms5 images in this research
最后用modis的云檢測結(jié)果對雙通道動態(tài)閾值法和表觀反射率法分別進行真實性檢驗。 - It's difficult to find cloud detection in a sentence. 用cloud detection造句挺難的
- The apparent reflectance algorithm estimates the clear - sky visible apparent reflectance as the bases of visible channel thresholds with the 6s radiation transfer model . cloud detection is tested with apparent reflectance algorithm to gms5 images
將表觀反射率乘以不同的系數(shù)得閾值，待檢測云圖的表觀反射率大于閾值的像元為云像元。 - Based on judge whether the visual band was valid or not , the method separated land region from water region , and then set proper threshold values separately for land and water regions in different images and different bands , by that way an automatic cloud detection could be achieved
該方法在可見光波段是否有效判斷的基礎(chǔ)上，進行圖像水陸區(qū)域劃分，然后對不同圖像、不同波段的水域和陸域分別設(shè)定合理的閾值，實現(xiàn)了云自動檢測目的。 - The cloud detection results are also compared with control masks that are created by visual inspections . in case the multi - day clear - sky composition is contaminated by cloud cover , it adds the chance of clear score failure . in case the multi - day clear - sky composition there is no snow cover , but in the same area at the image for detection there is snow , it also adds the chance of clear score failure
用表觀反射率法對gms5云圖進行云檢測，如果晴空合成圖某區(qū)域有云覆蓋，則易將被檢測的云圖相應(yīng)區(qū)域的云誤判成地表，如果某個區(qū)域的晴空合成圖沒有雪覆蓋，而被檢測云圖該區(qū)域有雪覆蓋，則必將雪誤判成云。 - 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(jié)論： ( 1 )大氣氣體的微波吸收在測云波段產(chǎn)生明顯的衰減，其中水汽衰減效應(yīng)變化很大；即將上天的空間94ghz測云雷達必須有水汽衰減訂正方案； ( 2 ) 37ghz和94ghz雷達測云，由于大氣和云衰減不同和雷達反射率的很大差異，導(dǎo)致雷達回波信號強弱不同； ( 3 )對云層較薄、含水量較少的云，在不計雷達參數(shù)的情況下， 37ghz雷達回波信號不如94ghz測云雷達，也就是說94ghz對薄云有更強的探測能力；對云層較厚、含水量大的云，由于強衰減的作用， 94ghz雷達回波信號小于37ghz雷達； ( 4 )從大氣衰減的不利因素方面考慮，空間94ghz雷達測高層薄云的效果最好；測低層薄云時需要考慮氣體衰減訂正；因濃厚云的強衰減作用，探測其中下部的能力大大減弱，不僅要進行衰減訂正，而且要借助其他信息來反演整個云層的含水量垂直分布； （ 5 ）為了獲得從極薄到極濃厚云的垂直分布探測能力，未來測云雷達系統(tǒng)最好采用雙波長甚至三波長（如94 、 37和13ghz ） 。