复反射群作为与实反射群不同的一类反射群，近年来得到了人们越来越多的研究。

As a class of finite reflection groups and different from finite real reflection groups, finite complex reflection groups are studied by more and more people in recent years.

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本文提出了基于FPGA技术实现数字复接系统的设计方案，并介绍了基群与二次群之间的复接与分接的系统总体设计。

This paper puts forward a design method of digital multiplex system with FPGA, and introduces the whole system of multiplexing and demultiplexing between primary group and secondary group.

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山东省莱西县南墅石墨矿位于胶东隆起栖霞复背斜的南翼，石墨赋存于太古界胶东群旌旗山组刘家庄大理岩段。

Nanshu graphite deposits, located at the south side of Qixia synclinorium in Jiaodong uplift, exist in Liujiazhuang marble member of Jingqishan formation, Jiaodong group of Archaeozic Erathern.

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