The analytical results show that the key point to realize the optimal parameters is to obtain the high reversible permeability of the core, and some methods to resolve this problem are given.
分析结果表明，获得高可逆磁导率的磁芯是实现最优化参数的关键，并给出了解决这一问题的途径。
The permeability change is a reversible course.
其通透性的变化为一个可逆的过程。
It is proved that the permeability reduction caused by ageing is the rearrangement of reversible structure.
证实了时效引起的磁导率衰减是可逆的结构重排过程。
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