Parameters such as frequency, intensity and pretreatment time of ultrasound are varied.
讨论了声场参数,即频率、声强、超声辐射时间对该过程的影响。
More complex methods such as frequency weighting and frequency normalization go beyond the scope of this article.
更复杂的方法,比如频率加权和频率归一化,超出了本文范畴。
Complicated system radars such as Frequency Agile radar, PRI Stagger radar are used more and more in various environments.
一些复杂体制雷达,如捷变频雷达、重频参差雷达等越来越多地被用于各种环境中。
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