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 this paper, a novel control strategy of fuzzy-PI control is presented for single-phase SPWM inverter.
为提高永磁同步电动机控制系统的抗扰性能，设计了一种新型的模糊PI控制器。 - The test results show that it has better performance both in dynamic and steady state than traditional PI control.
此方法计算量小，实验证明获得了较传统PI控制更好的动静态性能。 - I advocated pi calculus channels because of their simplicity, which generally translates to performance and maintainability.
我提倡使用pi演算通道是由于它的简单性，换句话说是由于它的高效性和可维护性。 - In the process of rotor speed identification, the variable parameters PI mechanism, which has good dynamic and static performance and robustness are used.
在转速辨识过程中，应用了具有较好动态性能和鲁棒性的变参数PI算法。 - Then the PI tuning method of SISO was used to obtain the optimal PI controller for each loop.
利用SISO系统PI控制器设计方法确定每个环路的最优PI控制器。 - 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。 - Opinions in the literature, Cao Pi and Cao Zhi on the surface seems to be different.
在文学的意见上，曹丕和曹植表面上似乎是不同的。 - Considering the characteristics of PMSM, a fuzzy-PI control method based on the fuzzy decision and relay self-tuning was proposed.
针对永磁同步电机的特点，提出了基于模糊决策和继电自整定的模糊PI控制方法。 - 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 - The design of nonlinear PID and PI attitude-controller for a flexible spacecraft
挠性航天器的非线性PID和PI姿态控制器设计