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
- 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。 - 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 - 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； - 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。 - 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。 - 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。 - 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。 - 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 - I am thrilled by seeking a story in pi.
在其中寻找一个故事才是令我兴奋的事情。 - 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。