extra-dense barium crown，extra-dense barium crown glass是什么意思

网络释义

用法例句

Operation Through Pterion Approach for Patients with Severe Traumatic Brain Injury;

跨中线翼点入路在特重型脑对冲伤手术中的应用

Numerical and simulation results show that the non-uniform constellation can improved the reliability of some important symbol bits effectively, together with the symbol bits rearrangement in the retransmissions and packet combining in the receiver, the overall average bit r.

通过对 AWGN 信道下 ARQ 方案进行理论分析和数值仿真,表明基于非均匀星座的新方案在信道条件较差时能有效地提高重要比特的可靠性,若重传中结合符号比特重排和分组合并,则可使接收端解调合并后的比特可靠性趋于均匀且总体得到提高,从而有效地减少重传次数,提高系统的吞吐率。