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。
Performance Index (PI) and Signal Interference ratio (SIR) were used to value the results of separation.
并用分离评价参数性能指标(PI)和信号干扰比(SIR)对分离效果进行了评价。
The combination of three parameters of Doppler is pulse index (PI), resistance index (RI), A/B ratio together with.
用搏动指数、阻力指数、A/B比值，结合二维实时显像对胎儿宫内生长迟缓、畸形、宫内胎儿死亡的研究。
The voltage ratio is derived and the system closed-loop control is realized with PI regulator.
从理论上推导了电压传输比，采用PI调节器实现了系统的闭环控制。
Methods The ratio of B/A, PI, RI of orbit artery was detected in 42 cases with EPH gestosis and control group (90 healthy pregnant women).
方法测定42例妊高征孕妇眼动脉血流参数（B/A、PI、RI）并与90例正常孕妇作对照分析以观察血流参数变化。
Methods The ratio of B/A, PI, RI of orbit artery was detected in 42 cases with EPH gestosis and control group (90 healthy pregnant women).
方法测定42例妊高征孕妇眼动脉血流参数（B/A、PI、RI）并与90例正常孕妇作对照分析以观察血流参数变化。
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