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）。
The proof of grafting was established by IR spectra, ninhydrin test, nitrogen estimation and other analytical methods.
并用红外光谱、水合茚三酮反应、含氮量分析等方法验证接枝反应的进行。
The analytical method of high-resolution selected-band spectra is an imported one in digital signal processing.
选带频谱细化分析方法是数字信号处理中的一种重要分析方法。
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