velocity focusing [光] 速度聚焦 ; 按速度聚焦
velocity-focusing mass-spectrograph 速度聚焦质谱仪
velocity-focusing mass spectrograph [物] 速度聚焦质谱仪 ; 速度谱仪
mass-spectrograph velocity-focusing 速度聚焦质谱仪
velocity focusing mass spectrograph 速度聚焦质谱仪
focusing velocity 速度聚焦
One difficulty with direct methods is that the designer spends a great deal of time focusing on the velocity distribution; the geometry is secondary.
一个直接的方法就是难度设计者花费大量的时间专注于速度分布；几何为辅。
Objective: Study the influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field.
前言：目的：研究声衰减系数、声速、温度等媒质参数对声聚焦的影响。
Such as how to select focus functions and focus Windows, how to perform feedback control, and how to improve the auto-focusing velocity etc., are far from completely solved.
在如何选择对焦评价函数和对焦区域、如何进行反馈控制和如何提高对焦速度等方面，还有诸多问题有待解决。
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