... aperture efficiency || 孔径面积效率，开口面积效率 aperture length || 孔径长度 aperture lens || 孔径透镜 ...
基于2个网页-相关网页
stomatal aperture length 气孔孔径长度
synthetic aperture length 综合孔径长度
length of synthetic aperture 合成孔径长度
length aperture ratio 长度孔径比
length of real aperture 真实孔径长度
It is demonstrated that ML estimating error can converge to CRB quickly with increasing synthetic aperture length and Signal to Noise Ratio (SNR), but a threshold effect exists.
研究表明，随着合成孔径长度和信噪比的增加，ML估计误差可以很快地收敛于CRB，但存在阈值效应。
If you know the focal ratio but not the focal length, you can calculate it: focal length is the aperture (in mm) times the focal ratio.
如果你不知道焦距，只知道焦比(focal ratio)，你可以通过这样计算的得到焦距：孔径(单位是mm)乘以焦比就是焦距。
For example, the focal length of an 8" (203.2mm) aperture with a focal ratio of f/10 would be 203.2 x 10 = 2032mm.
比如，孔径为8英寸(203.2mm)，焦比为f/10的透镜，其焦距为203.2 x 10 = 2032mm。
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