air space ratio 空隙比
open space ratio 开敞空间比例 ; 空地率
cell space ratio 细胞空隙率
mark-to-space ratio 标间比率
void space ratio 空穴空间所占的比率
pore space ratio 孔隙比
gel space ratio 凝胶空间比
Introduces two usual remote control signal encoding methods: pulse width modulation, pulse space ratio modulation.
介绍了两种常用的红外遥控信号的编码方法：脉冲占空比编码调制，脉冲宽度编码调制。
The soft ground has characteristics such as rich natural water content, big air space ratio, high compressibility, low shearing strength and so on.
软土地基具有天然含水量大、空隙比大、压缩性高、抗剪强度低等特点。
By analysing frequency spectrum in this paper, we can understand that when NRZ code be transferred into RZ code of 1/2 mark-to-space ratio, the timing clock can be obtained at largest power.
本文通过对NRZ、RZ伪随机码序列进行频谱分析，得知当NRZ码变换成码元占空比为1/2的RZ码时，所提取出的定时时钟功率最强。
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