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 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。 - 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。 - 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。 - 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。 - We want to discuss sigma bonds and pi bonds.
我们要讨论sigma键和π键。 - 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 - 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 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。 - 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。