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）。
Besides, drift and noise in the measurement will have significant effect on UV library spectra search.
此外，光谱测量的漂移和噪声也会影响紫外光谱库检索的正确率。
The transmission spectra drift from the varying of the gratings parameters is due to its modulation to the length of the Fabry-Perot-like.
光栅参数变化产生的透射光谱的漂移是由于其对这种类F—P腔长度的调制。
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