pi
英 [paɪ]
美 [paɪ]
n. 圆周率; 希腊字母表的第16个字母
复数：pis
BNC.8364 / COCA.18727
牛津词典
noun
- 圆周率
the symbol π used to show the ratio of the circumference of (= distance around) a circle to its diameter (= distance across), that is about 3.14159 - 希腊字母表的第16个字母
the 16th letter of the Greek alphabet (Π, π)
柯林斯词典
- 圆周率（通常用希腊字母�表示，近似值为3.142）
Piis a number, approximately 3.142, which is equal to the distance round a circle divided by its width. It is usually represented by the Greek letter �.
英英释义
noun
- the 16th letter of the Greek alphabet
- the ratio of the circumference to the diameter of a circle
双语例句
- In our self-Oscillation drive system, the stable error of the oscillation amplitude is eliminated by the PI controller.
在该闭环驱动系统中，通过引入PI控制器消除了振动幅度控制的稳态误差。 - PI controller is widely used in wind turbine control system and its parameters need to be identified.
风电机组控制系统中PI控制器较多，需要辨识各PI控制器的参数。 - The controller consisted of a PI feedback controller and a self-adaptive DRNN feed-forward controller.
反馈控制器以目标转速与实际转速的误差为输入量，采用PI控制来提高控制系统的稳定性。 - PI/ HO33342 double staining could distinguish apoptotic cells as well as normal cells;
PI/HO33342双染可区别凋亡、坏死和正常细胞，且可以见到染色质碎裂； - Fuzzy PI Control Strategies of Networked Control System
网络控制系统的模糊PI控制方法 - The model of speed loop control system as well as the integral separating PI controlled algorithm was analyzed in detail.
对控制系统建模和积分分离PI算法进行了详细的分析。 - Research of Hybrid Excitation Claw Alternator Control System Based on Fuzzy Self-adaptive PI
基于模糊自适应PI的混合励磁爪极发电机控制系统研究 - Simulation results show it is better than classic PI optimal controller.
仿真结果表明，它也优于经典离散PI最优调节器。 - This is a calculated pi source can be used as the primary portal learning.
这是一个圆周率计算源码，可以作为初级入门学习之用。 - Research of fuzzy PI control of dual-motors driving servo system
双电机驱动伺服系统的模糊PI控制研究