PED-graphs are a class of new defined graphs by Qiongxiang Huang in 2006, the nullity of PED-graphs has been studied in depth.
PED-图是黄琼湘教授在2006年定义的一类新图,并对其零化度进行了深入的研究。
This paper describes the present situation of our country's undermine communication, and introduces the principle of PED system and current development and utilization of PED system.
简单叙述了我国井下通信的现状,介绍了PED系统的原理及矿井PED系统目前的发展和应用情况。
本网站所收集内容来自网友分享仅供参考，实际请以各学校实际公布信息为主！内容侵权及错误投诉：1553292129@qq.com
CopyRight © 2020-2024 优校网[www.youxiaow.com]版权所有 All Rights Reserved. ICP备案号：浙ICP备2024058711号