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。
Primary analysis of differential gene expression profile of type 1 and type 2 astrocytes
兩
型星形膠質細胞基因表達
譜差異的初步觀察
The origins of stars of differing spectral types must be dissimilar.
不同光
譜型星的起源必然是不一樣的。
The corona activity of late - type ms stars exist a inflexion nearby f5. there have two fold reason
分析結果顯示f
型主序星的冕球活動在光
譜型f5附近存在拐點。
Furthermore, we also reserch the influence of setllar age to stellar activity of late - type stars. the relation of stellar chromospheric activity and rotation of late - type main sequence stars depend on stellar spectral type
大樣本分析顯示晚
型主序恆星的色球活動與恆星自轉參量的研究晚
型主序恆星的色球活動與恆星自轉參量間的關系表現出對恆星光
譜型的依賴。
The relation between stellar chromospheric activity and rotation of evolution stars have a good relativity. but meticulous analysis show chromospheric activity of evolution stars depend on stellar spectral type and effective temperature strongly. we provide several possible explain for those phenomena
但是細致分析顯示演化恆星色球活動水平隨恆星自轉周期間的分佈對恆星光
譜型和恆星表面有效溫度有很強的依賴,並對這些現象提出了幾種可能的解釋。
Research on the plasmid profiles of the neisseria gonorrhoeae isolates
淋球菌分離株耐藥質粒
譜型研究
The 29 f globular clusters in the galaxy are selected as samples in my paper ( the space distribution and motional orbits of the samples have not been researched in detail before. ). according to the basic parameters : azimuth coordinates, distances from the sun, radial velocities and proper motions of sample clusters, the initial positions and velocities of the samples are reduced using the galactic coordinates, and their orbits are integrated by numerical method for three different galactic gravitational potential models
本文選用銀河系中29個累積光
譜型為f
型的球狀星團作為樣本(這些樣本星團的空間分佈和運動特徵都沒有被詳細地討論過) ,根據它們的基本資料:方位坐標、日心距、視向速度,絕對自行等參數,歸算處理得出了各樣本星團的空間分佈和運動速度。
Vacuum technology - mass - spectrometer - type leak - detector calibration
真空技術.質
譜型泄漏檢測儀的校正
Therefore, the research of the statistical characteristics of double peak spectrum will have the practical significance
因此,對雙峰
譜型海浪統計性質的研究具有重要的意義。
Statistical analysis and study of basic characteristics on wind and ocean wave in the yangtse river estuary are carried out to rich the knowledge of the ocean waves in the yangtse river estuary
對自記波浪數據得出的各波浪要素值進行統計分析、研究;對其雙峰
譜型海浪統計性質進行了分析研究。
The corona activity of late - type main sequence stars also depend on the stellar spectral type
晚型主序星的冕球活動也表現出對恆星光譜型的依賴性。