The results indicate that the discrete cosine transform has a good compressibility to NIR spectra of tea.
结果表明，离散余弦变换对近红外光谱具有较强的压缩能力。
Firstly, a new wavelength selection method based on the relevant information between chemical component and the NIR spectra is developed.
提出一种基于近红外光谱与化学组分之间相关信息量分析的光谱波段选择方法。
With NIR spectra, the analytical information is contained in small spectral variations and usually dominated by the features such as light scattering, background noise and baseline drift.
近红外光谱不但包含着物质成分信息，而且这些信息完全掩盖在众多复杂背景当中（包括光散射、背景噪声以及背景漂移）。
Many important constituents of seed sample were determined and corresponding NIR spectra of various samples were collected, therefore, the original databases for NIR calibration were created.
进行重要品质性状的常规分析和测定，收集多种样品状态的NIR信息，以此组成NIR分析的原始群体。
PLS algorithm was applied in the establishment of analytical models showing the relationships between the 2nd derivatives of NIR spectra with the contents of the respective components mentioned above.
用PLS计算法建立了表示上述组分的二阶导数近红外光谱与其含量间关系的分析模型。
The UV-VIS-NIR and fluorescence spectra of the complexes were measured and analyzed.
同时对两种化合物的UV - VIS - NIR和荧光光谱进行了测定和分析。
The research result indicates that as the particle size decreases, the upconversion red emission and NIR emission components increase in the emission spectra.
对实验结果的分析发现，随着粒径的减小，样品发射光谱中红光和近红外发射的成分增加。
The UV-Vis-NIR, IR and fluorescence spectra of the complexes were measured.
测定了配合物的紫外-可见吸收光谱、红外光谱和荧光光谱。
Visible/near-infrared (VIS/NIR) diffuse reflectance spectra were applied to non-destructive measurement of surface color of pear.
应用可见/近红外漫反射光谱对梨表面色泽进行无损检测研究。
The UV-VIS-NIR reflectance spectra of the Moon are an important tool to interpret Moon surface composition.
月球紫外-可见-近红外反射光谱（强度，反照率以及吸收特征）是研究月球表面物质组成的重要手段。
The UV-VIS-NIR reflectance spectra of the Moon are an important tool to interpret Moon surface composition.
月球紫外-可见-近红外反射光谱（强度，反照率以及吸收特征）是研究月球表面物质组成的重要手段。
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