mask-to-nise ratio 遮蔽对噪声比
noise-to-mask ratio 和噪掩比
signal-to-mask ratio 信号掩号比
signal-mask ratio 信号掩蔽比
noise to mask ratio 噪声掩蔽比
duty ratio of the mask 模板占空比
Objective to investigate success ratio, anatomy position, air leakage pressure and complications between reusable laryngeal mask LMA classic and single-use LMA Unique.
目的本研究比较了普通喉罩和一次性喉罩放置的成功率，解剖位置、口咽漏气压和并发症。
The pore radius was in nanometer scale, with uniformity and high ratio of depth and radius, so it's ideal mask for one-dimension nanometer materials.
其孔径为纳米级且分布均匀，纵横比大，是合成一维纳米材料的理想模板。
Therefore, a new approximation model for alternating phase shift mask considering shadowing effects was proposed in this paper, and shadowing ratio was redefined.
因此本文针对交替式相移掩模，提出了一种考虑阴影效应的近似模型。
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