the underground coal mine is a typical confined space where complex multi-path propagation will result in frequency selective fading in the wireless channel.
煤矿井下传输环境是一类典型的受限空间,复杂的多径传播造成了无线信道的频率选择性衰落。
the development trend of scraper conveyor used at working face of underground coal mine overseas is to have greater driving power.
国外用于采煤工作面的刮板输送机的发展趋势是加大驱动功率。
the coal face of blasting mine in underground coal mine is a very complicated system of disaster environment, the spatiotemporal limit increases the accident probability of blasting operations.
煤矿井下炮采工作面是一个非常复杂的灾害环境系统,又由于时间、空间的限制,使得炮采工作面爆破作业引发事故的可能性增加。
the last underground coal mine in hungary, at the vertesi power plant, is slated for closure at the end of this year.
匈牙利最后的地下煤矿,位于威尔泰西发电厂,将在今年年底前关闭。
to find out the radiological level of underground coal mine in anhui and jiangsu, we had a spot check in the main production areas.
为了了解皖苏两省地下煤矿环境中的放射性水平,对两省煤炭主采区的地下煤矿进行抽样调查。
in this paper the author of underground coal mine deep hole blasting technology in this paper.
本文笔者就其中井下煤矿深孔爆破施工技术进行阐述。
it is a significant problem of mining area subsidence resulting from underground coal mine mining, which resulted in soil resources destruction, even a lot of waterlogging in the high water level.
因地下煤炭开采导致的矿区塌陷是目前矿区的主要问题之一,这些塌陷造成土地资源破坏,在高水位甚至出现积水。
this paper demonstrates the optimization of the nearly flat seam underground coal mine planning by the multi-objective decision-making method.
文章采用多目标决策法进行近水平煤层矿井设计的最优化。
at present, we use wire communication underground coal mine in our country. information is transmitted by electric cable. when the accident happened, the communication is discontinued at once.
目前我国煤矿井下通讯基本上是有线装置,依靠电缆传输信息,一旦发生事故,通信马上中断。
the paper thoroughly introduces the ac-ac frequency converter in driving system of asynchronous motor for underground coal mine explosion-proof winder.
本文对一种用于煤矿井下防爆绞车驱动的交交变频器——鼠笼式异步电机传动系统做了全面的介绍。
may 18, 1996, china's first industrial test of underground coal gasification base - two underground coal mine in tangshan liu gasifier ignition success.
中国第一个煤炭地下气化工业性试验基地——唐山刘庄煤矿两座地下气化炉点火成功。
there were no such miracles left in november, when an explosion at an underground coal mine across the southern alps from christchurch killed 29 men.
(接着在)11月,在克莱斯特彻奇境内南阿尔卑斯山发生了前所未见的地下煤矿爆炸事故,造成了29人死亡。