The separating circle and separating strip of the maximum plane graph are defined.
定义了极大平面图的分离圈和分离带，并讨论了一些简单的平面图的着色问题，又给出了一类４－可着色的极大平面图。
Twelve or thirtheen peaks have been recognized and their assignment are confirmed to CH stretching bands in the 3100-2800cm-1 range for coals and macerals in Hailar Basin, using diffuse reflectance infrared spectroscopy and spectra separating technique.
利用红外漫反射光谱和谱带分离技术，从海拉尔盆地煤及其显微组分的红外漫反射光谱图中，在3100—2800cm－1范围内分辨出12或13个峰，并确认了结构归属。