Graph plotting part consists of histogram, cross section drawing, clustering spectral pattern, 2-dimensinoal factor scattergram.
图形绘制包括：直方图、因子平面散点图、聚类谱系图、剖面图。
So we can figure out the chemical make up of another star by comparing the spectral pattern it has to the pattern of the elements seen in the library.
因此我们就能够通过比较光谱线的模式和光谱库中已有的元素的模式，判断出另外一颗恒星的化学成分了。
Spectral pattern recognition techniques are employed to suppress the strong and highly varying background to extract the very weak emission features from the compound spectra.
谱的模式识别技术可用于强变化的背景压缩和提取化合物极为弱小的发射特征。
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