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 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。 - However, PI and square root are a bit more common.
然而，PI和平方根比较常见。 - 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。 - 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。 - 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 - 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。 - 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。 - 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。 - 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。 - Net Search Extender supports comment nodes ( example 3 in Listing 30) and processing-instruction ( PI) modes.
NetSearchExtender支持评论节点（清单30中的示例3）和处理指令（PI）节点。