直接反射系數 的英文怎麼說

中文拼音 [zhíjiēfǎnshèxìshǔ]
直接反射系數 英文
direct reflection factor
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 接 : Ⅰ動詞1 （靠近;接觸） come into contact with; come close to 2 （連接; 使連接） connect; join; put ...
  • 反 : Ⅰ名詞1 （方向相背） reverse side 2 （造反） rebellion 3 （指反革命、反動派） counterrevolutionari...
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 直接 : direct; immediate
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Based on historic radiosonde data of changchun city, jilin province and xian city. shanxi province and on the typical model of profiles of cloud liquid water content for stratiformis, the coefficients of retrieval equation are obtained as the functions of height for each month from april to july in the two cities. furthermore, we explore the internal physics signification of retrieval coefficients ' distributing according to every month and have comparisons between the two cities. then the numerical simulation tests of the accuracy of retrieval results are given : the statistical relative deviation of retrieved values of l to the simulated " trues " on the ground is 15 - 25 % and that at altitude of 6km is 5 - 10 %, that means the retrieval method and implementation of the method are applicable to processing measurements of an airborne radiometer made in china recently

    本文介紹機載對空微波輻射計探測雲中路徑積分液態水含量（ l ）的輻射傳輸原理和反演方法；根據吉林省長春市和陜西省西安市的歷史探空資料和典型的層狀雲液水垂直分佈模式，得到這兩個地區4 - 7月各月的隨高度而變的反演公式及其系數的表達式；探索了和反演系數有關系的大氣的影響，並在各個月份之間進行了比較分析；給出了反演誤差的數值模擬檢驗結果：在地面反演值對『真值』的統計相對偏差是15 - 25 ，在6公里高度處為5 - 10 ，表明該方法已具有實用可接受的精度。
  2. Specially for the particularity of the path - length control system in the laser gyros consist of total reflecting prisms and the necessity of identifying the parameters in the system, the mathematical model of the temperature control system in the trp laser gyros is presented, and three new identifying algorithms are deduced in theory based on the method of the least squares : algorithm of immediately identifying, algorithm of instrumental variables and recursion algorithm

    摘要針對全反射棱鏡式激光陀螺腔長控制系統的特殊性及其模型參數辨識的必要性，給出trp激光陀螺溫度控制系統的數學模型，並基於最小二乘法從理論上分析推導出3種新型參數辨識法：直接辨識演算法、輔助變量法和遞推演算法。
  3. 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
  4. Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics, chinese academy of sciences, measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface, giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility, putting forth different coefficients and functions on variable visibility, also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day, analyzing the ratio between scatter and total irradiance, and its relationship with atmosphere mass and total atmosphere optical depth, lastly contrasting with the survey results by aeronet beijing station, the results of retrieval is in reason, this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust

    利用中國科學院大氣物理研究所與長春光學精密機械研究所合作研製的太陽?大氣紫外光譜輻射計（ sauvs ） ，測量到達北京地表的太陽直接和散射紫外光譜輻射，導出了大氣氣溶膠的光學厚度。初步結果表明：北京紫外波段大氣氣溶膠的光學厚度在絕大部分情況下隨波長的增加而單調減小，用指數函數可以較好地擬合反演結果，統計得到了三個水平能見度狀況下擬合函數的系數值和公式表達式；初步分析了揚沙、浮塵、沙塵暴天氣條件下氣溶膠光學厚度的特點，並與一般晴朗天氣條件下的氣溶膠光學厚度特點做了比較分析；分析了太陽紫外譜輻射中散射輻射與大氣質量、大氣總光學厚度的定性關系和定量表達式；最後與全球氣溶膠監測網路（ aeronet ）北京站的資料做比對，表明反演結果基本合理。
  5. In the paper, we firstly introduce database technologies into ontology storing, put farther forward a directly storing method from ontology to relational database, this method makes for advancing efficiency for ontology storing and query. secondly, we ameliorate rdf / owl ontology storing arithmetics : rdf2rdb and owl2rdb, experiments prove these betterments can improve query efficiency for ontology data stored. whereafter, we study the reverse technique from relational database to ontology, put forward a method from relational pattern to owl, it proves to be valid through an example

    本文首先將數據庫技術引入到本體存儲中，進而提出了本體向關系數據庫直接存儲的方法，該方法可以提高本體存儲和查詢效率;另外研究並改進了rdf和owl本體的關系模式存儲演算法rdf2rdb 、 owl2rdb ，實驗表明兩種方法可以有效提高本體存儲后的查詢性能;然後研究了關系模式下的數據反向到本體的技術，提出了關系模式向owl本體映射的方法，並以實例證實方法的可行性。
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