two-frequency-scale双频模式 It is shown that any two-frequency-scale stabilizing compensator can be asymptotically approximated by a compensator d.
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本文提出并建立了双反射膜双频激光器物理模型，该模型不仅考虑了激光腔镜的双反射膜作用、横向磁场的作用，同时还考虑了激光腔内模式耦合问题。
A physical model in consideration of not only the effect of bireflectance film and transverse magnetic field but also the mode coupling in the laser cavity is set up.
目的：比较双频共焦模式和单频模式高强度聚焦超声(HIFU)单次辐照毁损灶的大小。
Objective: To evaluate the lesions size created by confocal dual-frequency high-intensity focused ultrasound (HIFU) and conventional single-frequency HIFU.
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