spectral background 中文意思是什麼

spectral background 解釋
光譜背景
  • spectral : adj. 1. 鬼的；鬼怪（似）的。2. 【物理學】光譜的。
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  1. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  2. The concept of irradiance signal - to - noise ratio ( snr ) on the target plane and the minimum of the irradiance that can be detected by the detector was taken as the beginning, combined with a thorough analysis of the spectrum radiating feature of the target and the sky background, the atmosphere conditions, spectral filtering and the influence that the various components in the system have on the target irradiance on the detector ' s target plane and the background irradiance snr, the equation of the flying bomb ' s effect range affected by the point of burst measuring system is made, and all related factors that have an impact on the effect range are analyzed as well

    從探測器靶面上輻照度信噪比的概念、探測器的可探測輻照度最小值出發，在詳細分析目標、天空背景的光譜輻射特性、大氣條件、光譜濾波技術以及系統各環節對探測器靶面上目標與背景輻照度信噪比的影響的基礎上，推導了炸點測量系統對爆炸的飛行彈體的作用距離方程，分析了影響作用距離的諸因素。
  3. Because the concentration of zirconium in uranium has large ranges, from 1. 50xlo ' 6 - 3. 8g / gu, not only how to decrease the remainder of uranium to eliminate its determinate effect but also how to acquire higher recovery of zirconium is considered, so the method of silica gel, the method of tbp levextrel resin chromatography, the method of tta chromatography and the method of tta extraction are compared. then tta extraction is chosen to acquire the ideal separation purpose. compared with icp - ms and icp - aes, xrf has characters of high repeatability, stability, low cost, high concentration elements analysis, the ability to determinate solid sample and having comprehensive practicability, but xrf has lower sensitivity, so how to increase the concentration of the sample to acquire better precision is a difficult problem, the optimum of operating condition : the integral time of spectral lines is 60s, the integral time of background lines is 20s, the voltage of xrf is 50kv, the electric current is 50ma

    由於鈾中鋯的含量范圍很廣，從1 . 50 10 ~ （ - 6 ） 3 . 8g / gu ，在分離和測量時，既要考慮盡量地減少鈾的殘留量以消除鈾對鋯測量產生的影響，又要獲得鋯的理想的回收率，因此本文在分離方法的選擇上比較了硅膠吸附分離法， cl - tbp萃取色層法， tta萃取色層法和tta萃取分離法的優缺點，認為tta萃取分離法可以達到理想的分離效果。
  4. Background spectral radiance

    本底光譜輻射強度
  5. In the background of the corporative project between zhujiang steel l. t. d and guangzhou machine sience research institute, the paper researches on the spectral analysis technology of oil. and the result is applied to judging equipment acute wear and wear place

    本文以珠江鋼鐵公司和廣州機械科學研究院合作的項目為背景，研究了油液監測技術中發射光譜數據的分析問題，並將研究成果運用到設備劇烈磨損判別和磨損部位識別的應用中。
  6. The performance of high spectral resolution makes it suitable for the detection of human - made targets surrounded by natural environment background. therefore, it becomes more and more popular

    高光譜圖象良好的光譜診斷能力使得它非常適合對照自然背景發現人工目標，因此越來越受到各國的重視。
  7. The content of this dissertation includes following subjects : the ir imaging model of city buildings, the realist image synthesis between ir target and the ground background, the real time walkthrough for dynamic ir scene, a quantity optics based illumination model for ir image synthesis and the realistic fusion of multi - spectral images, etc. in chapter 1, we first introduce some primary knowledge, research contents, application domains and related research works about ir technology and infrared image synthesis

    內容涉及以下幾個方面：城市建築物紅外成像模型、地面目標與背景的真實感紅外合成、動態紅外場景的實時生成、基於量子光學原理的紅外成像光照模型和多光譜融合真實感成像等。本文第一章介紹了紅外技術和紅外成像模擬技術的基本知識、研究內容、應用領域和國內外發展現況。指出利用計算機圖形學特別是虛擬現實的最新技術將是今後的發展方向。
  8. Furthermore, the optimum analysis conditions are determined comprehensively study of the digestion way of the silicate samples, selection of the spectral lines, the analysis parameters of the apparatus and the background correction etc

    對硅酸鹽的熔樣方法、元素分析譜線的選擇、背景校正及元素間干擾及儀器分析參數等因素進行了研究，綜合確定了最佳試驗條件。
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