本文讨论了序半群的（ＰＯ）与（ＧＯ）性对序半群结构的影响，以及极大（小）正则半群的性质，并给出了几类（ＰＯ）序半群的结构，得到极大（小）正则半群与单位正则半群......

Over the span of years, improvements over various synthesis methods of graphene are constantly pursued to provide safer ......