PI

noun

1. 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
2. 希腊字母表的第16个字母
   the 16th letter of the Greek alphabet (Π, π)

1. 圆周率（通常用希腊字母�表示，近似值为3.142）
   Pi is 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 �.

1. 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。
2. However, PI and square root are a bit more common.
   然而，PI和平方根比较常见。
3. Simulation results show it is better than classic PI optimal controller.
   仿真结果表明，它也优于经典离散PI最优调节器。
4. 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。
5. 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
6. 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。
7. 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
8. 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。
9. 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。
10. We want to discuss sigma bonds and pi bonds.
    我们要讨论sigma键和π键。
11. The output voltage of converter is stabilized at the reference value by PI close-loop control.
    通过PI闭环控制，将变流器输出电压实时稳定于基准值。
12. 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。
13. Fuzzy PI Control Strategies of Networked Control System
    网络控制系统的模糊PI控制方法
14. 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。
15. In this paper, a novel control strategy of fuzzy-PI control is presented for single-phase SPWM inverter.
    为提高永磁同步电动机控制系统的抗扰性能，设计了一种新型的模糊PI控制器。
16. 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。
17. 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。
18. 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。
19. 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。
20. 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
21. 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。
22. 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
23. 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；
24. 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。
25. 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。
26. 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。
27. 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；
28. 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。

noun

1. the 16th letter of the Greek alphabet

2. the ratio of the circumference to the diameter of a circle