atmosphere attenuation 中文意思是什麼

atmosphere attenuation 解釋
大氣衰減
  • atmosphere : n. 1. 大氣；大氣層，氣圈；空氣。2. 四圍情況，環境，氣氛。3. （藝術品的）基調，風格。4. 氣壓。5. 【化學】霧。
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  1. 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 ） 。
  2. Firstly, the characteristics of radiation propagation and attenuation in the atmosphere, and the power response of a contrast - limited optoelectic system are analyzed, the apparent contrast model of a target is developed, and the detection range equation dependent on the aerosol extinction coefficient and range parameter are derived

    首先，分析了紅外波段大氣輻射傳輸與衰減、對比度限制光電成像系統功率響應特性，建立了目標表現觀對比度模型，並推導出了由氣溶膠消光系數和距離參量確定的探測距離方程。
  3. Firstly, by the analysis ir radiation characteristic of target on environmental background, and the attenuation characteristic of ir radiation through atmosphere, the calculation formula of ir radiation of target is discussed. the design ideas and implementation method to generate dynamic ir images with computer are addressed in this paper

    首先，分析了目標的紅外特性，以及環境對目標的紅外輻射的影響，目標輻射在大氣中的衰減，給出了相應的計算公式，本文論述了動態紅外成像的設計思路和實現方法。
  4. In this paper, firstly, three - dimensional geometrical models of the target and ir flares are established and by using the software vega missile attacking process is real - time simulated visually. secondly, the ir radiation characteristic of the target, background and the ir flares are analyzed, in which the wave radiation of the sun at different time, wind speed, the relative humidity and ir radiation attenuation characteristic of the atmosphere is under consideration. from above the ir image of the target, ir flare and the background are got and then are normalized to gray color image that will be showed in a child window in real time

    本文通過三維建模工具creator建立目標、背景和干擾的三維模型，再通過視景模擬軟體vega生成載機、導彈和目標飛機的可見光場景圖像，實時地對導彈攻擊工程進行可視化模擬；並分析了目標、背景和干擾的紅外輻射特性，計算出傳感器路徑上大氣衰減等等，將經過衰減的目標、背景和干擾的輻射強度量化為灰度圖，以子窗口形式實時顯示；進一步可以使目標和干擾按照各自的運動軌跡運動，便可產生動態的紅外熱圖像序列。
  5. In this thesis, modeling of the characteristic of the ir jamming is discussed. the attenuation characteristic of ir radiation through atmosphere is analyzed and the atmospheric permeance of ir radiation is given. the design ideas and implementation method to generate dynamic ir images with computer are addressed

    在論文中，討論了干擾彈的建模，分析了紅外輻射在大氣中的衰減，總結出大氣透射比的工程計算方法，論述了本文動態生成紅外圖像的設計思路和實現方法。
  6. 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。
  7. Ultrasonic distance measurement is the new distance measurement. this thesis studies the ultrasonic distance measurement, and reasearchs ultrasonic attenuation in the atmosphere and hydraulic oil, analyses the factors which inflence measurement precision

    文中對超聲波在空氣中、液壓油中的衰減情況進行了分析，並對在空氣中、液壓缸中的影響測量精度的幾個因素進行了分析。
  8. Acoustics - attenuation of sound during propagation outdoors - part 1 : calculation of the absorption of sound by the atmosphere

    聲學戶外聲傳播衰減第1部分:大氣聲吸收的計算
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