目的研究凹球面超声换能器的声焦域在高声强和媒质有较大衰减情况下，其形状和几何位置的变化。
Objective the variations of the site and shape of focal region for a concave spherical ultrasound transducer in the case of high sound intensity and stronger attenuation were studied.
方法1的约束域分割法还可用以求解约束为凹集时的规划问题。
Besides, the constraint set cutting method of the method 1 can be used to solve the programming problems with concave constraint set.
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