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
- An integral item of error was added to the PI regulative law to restrain interference effectively.
在PI调节律中引入了对误差的积分项以更好地抑制外部扰动； - 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。 - 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。 - 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。 - Predictive voltage feedback PI controller with feedforward voltage compensator is adopted as the controlled method of the inverter system.
针对在光伏并网系统中采用单纯PI控制的缺点，提出了增加电网电压前馈控制来改善并网电流波形。 - 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 - 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。 - 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。 - The output voltage of converter is stabilized at the reference value by PI close-loop control.
通过PI闭环控制，将变流器输出电压实时稳定于基准值。 - 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。