儀器變異 的英文怎麼說
中文拼音 [yíqìbiànyì]
儀器變異
英文
equipment variation-
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。But now that clifford was drifting off to this other weirdness of industrial activity, becoming almost a creature, with a hard, efficient shell of an exterior and a pulpy interior, one of the amazing crabs and lobsters of the modern, industrial and financial world, invertebrates of the crustacean order, with shells of steel, like machines, and inner bodies of soft pulp, connie herself was really completely stranded
但是現在克利福正向著這加一個實業活動的不可思儀的世界猛進了。他差不多變成了一隻動物，有著一個實用的怪殼為表，一個柔軟的閃髓為里，變成了一隻近代實業與財政界的奇異的蝦蟹，甲殼蟲類的無脊動物，有著如機器似的鋼甲和軟閃的內部，康妮自己都覺得全摸不著頭腦了。Results show that relative standard deviation ( rsd ) of prediction value will become larger from 2. 5 % to 4. 72 % with energy decreasing form 100 % to 18 %. it is demonstrated that energy will not significantly affect predictive power by analysis of variance, because 3 samples f - value is 1. 62, 3. 02 and 2. 23 that all less than critical value f0. 05 = 3. 35
不同能量下的預測值與化學值相關直線的t檢驗（ = 0 . 05 ）表明各相關直線均無顯著性差異；模型預測值的方差分析（ = 0 . 05 ）表明儀器能量變化並不會使未知樣品預測值產生顯著性差異。The following is the result : for calibration set, correlation coefficient r = 0. 84, coefficient of variation is 5. 45 % ; for prediction set, correlation coefficient r = 0. 93, coefficient of variation is 5. 54 %. the analysis of experiment ' s result shows that this apparatus can fulfill the application of practice using
對實驗結果分析，校準集中預測值與化學值相關系數r = 0 . 84 ，變異系數為5 . 45 ，檢驗集中預測值與化學值的相關系數r = 0 . 93 ，變異系數為5 . 54 ，表明本儀器可以滿足實際應用的需要。Positron emission tomography ( pet ) is the functional imaging equipment with good specificity among the modern nuclear medicine instruments. it can make the noninvasive diagnosis of coronary artery disease ( cad ), brain disease and tumor in their early changes. therefore, it plays a very important role in the field of modern medicine
正電子發射斷層掃描儀（ pet ）是核醫學儀器中一種具有較高特異性的功能成像設備，它能夠對心腦血管疾病及腫瘤病變進行早期的無損診斷，在現代核醫學領域里起著十分重要的作用。分享友人