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
- 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。 - 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。 - Fuzzy PI Control Strategies of Networked Control System
网络控制系统的模糊PI控制方法 - In the corporate brand building, Product Identity ( PI) strategy is very important.
在企业的品牌建设中，产品形象识别（PI）策略是非常重要的。 - The inner loop adopts PI algorithm and the outer loop adopts a time optimal self-tuning PID algorithm.
伺服控制器分别采用有源PI校正和时间最小参数自调整PID控制算法。 - 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。 - 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 - Application of PI Generalized Predictive Control with Time Stamp to Networked Control Systems
时戳PI广义预测在网络控制系统中的应用 - 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。 - 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；