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。 - 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。 - 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。 - 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 - 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。 - 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。 - 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。 - 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 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。 - Research of fuzzy PI control of dual-motors driving servo system
双电机驱动伺服系统的模糊PI控制研究