n It takes discrete values, multiples of some integer n, and the multiplication factor is the ratio of the Planck constant divided by 2 pi where n takes one, two, three and so on.
这些离散的值乘以整数，乘积因子,是普朗克常数除以2π,其中n可以取1，2，3，等等。
In this paper, a new duty ratio control technology using PI controller is presented.
本文提出了一种使用PI控制器的占空比控制技术。
Conclusions: The ratio of ovarian medulla area to ovaries area, PI? Ri of ovarian medulla were important role in diagnosis of PCOS index.
结论：卵巢髓质面积与卵巢面积的比值、卵巢髓质pi, RI值有重要辅助诊断多囊卵巢综合征的价值。
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