光谱级，是物理学术语。意思是复合光经光栅衍射后，给出不同级次的光谱。
... spectrum locus 光谱轨迹 order of spectrum 光谱级 spectrograde 光谱级 ...
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... order of spectrum 光谱级 spectrograde 光谱级 spectrum sensitivity 光谱灵敏度 ...
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衍射光栅光谱级 diffraction grating spectral order
光栅光谱级 grating spectral order
光谱级试剂 spectrograde reagent
第一级光谱 first order spectrum ; spectrum of first order ; primary spectrum
第二级光谱 secondary spectrum ; second order spectrum
次级光谱 secondaryspectrum ; [光] secondary spectrum
光谱分级 spectral class
二级光谱 second order spectrum
沙化土地光谱数据源分为单一地物类型级和复合地物类型级两种，野外测量时分别采取不同的采样方法。
Spectral data sources of sandy land included single surface feature and composite surface feature, and their spectral data were measured by different sampling methods.
阐述了不同条件下从泥炭中分离出来的腐植酸级分的光谱研究结果，以便为腐植酸的分级方法提供依据。
In order to demonstrate the fractionating method, the results of spectroscopy study on humic acid fractions separated from peat in different conditions were introduced.
首先在画素级上提取影像的纹理和形状结构特征，在构建的多尺度分割集影像上提取物件的区域光谱特征。
Firstly, texture and shape features are extracted at the pixel level, and spectral features are extracted at the object level based on multi-scale image segmentation maps.
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