PI

Pi Day is celebrated on March 14th ( 3 / 14 ) around the world . For example :

世界各地会在每年的3月14日庆祝圆周率日。

How much is one over two times the square root of pi ?

圆周率的平方根的二分之一是多少？

Pi ñ atex - a new leather-like material made from pineapple leaves - on the other hand , may just be the all-around eco-leather we 've all been waiting for .

而现在，一种类似皮革的新材料Piñatex横空出世。这种用菠萝叶子做成的材料可能正是我们期待已久的全能环保皮革。

QT3.14 is mathematics slang for cutie pie , that is , a cute , attractive person . QT means cutie , and 3.14 means pie ( with same pronunciation with Pi ) .

QT3.14是用数学俚语指代某个可爱又迷人的家伙，这里的QT其实就是cutie（可爱）的缩写，而3.14则代表pie（招人喜欢的人），与该数字原本代表的数学概念Pi（圆周率）同音。

A classic crime novel with over 13000 five-star Goodreads ratings : PI Philip Marlowe is drawn into the mystery of a war veteran ’ s murdered wife , which heats up when the veteran himself disappears .

这是一部经典的犯罪小说，获得超过13000个Goodreads五星级评分：主人公菲力普·马洛卷入到退伍军人妻子谋杀案的谜团中，当这名退伍军人失踪时，这一事件升温了。

Tsau Pi and Tsau Jr were sons of Tsau Tsau . Both were very gifted writers , and Tsau Jr was especially quick-witted .

曹丕与曹植都是曹操的儿子，二者均有才华，特别是曹植更具文采。

One day , Tsau Pi called Tsau Jr into see him . He ordered his brother to make up a poem within the time it took to walk seven steps , adding that if he could not , his life would be in danger .

有一天，曹丕要求接见曹植，他要求曹植在他七步之内作诗一首，如果做不到，就会有生命危险。

After Tsau Tsau 's death , Tsau Pi took over the throne of the kingdom of wei . Jealous of Tsau Jr 's literary ability , and afraid that he might cause problems , Tsau Pi was always looking for a way to kill his brother .

在曹操死后，曹丕继任大统，但他嫉妒曹植的才华，同时也惧怕曹植会谋反，所以一直在伺机杀害曹植。

Discussion on the Application of PI System in Distribution Network Management

浅谈PI实时系统在配网运行管理中的应用

A Research on Fuzzy PI Control for Traction Control System

牵引力控制系统模糊PI控制方法研究

Research on PMSM Fuzzy PI Control System Based on DSP

基于DSP永磁同步电机模糊PI控制系统研究

Structural Analysis of Nonlinear Fuzzy Controller Based on PI / PD Control

一类基于PI/PD的非线性模糊控制器的结构解析

Study on the Application of Fuzzy / PI Control to Active Vibration Isolation System

Fuzzy/PI控制在振动主动控制中的应用研究

High working memory capacity can shorten the time course of PI .

高工作记忆容量能加快预期推理产生的时间进程，即高工作记忆容量的读者比低工作记忆容量的读者产生预期推理所需要的时间要短。

Implementing the general PI control algorithm by means of PLC

通用PI控制算法的PLC实现

Research of fuzzy PI controller based on error integral

基于误差积分的模糊PI控制器的研究

Robust stability of predictive PI control algorithm for delay network

时滞网络预测PI控制算法鲁棒稳定性分析

Internal Model Control and PI Control

内模控制与PI控制

Configuration and Management of PI Real-time Database and its Applications

PI实时数据库系统的结构、管理及其应用

PI control policy is commonly used for conventional control of HVDC .

HVDC系统的常规控制普遍采用PI控制策略。

PI control is adopted in order to improved precision of steady state .

PI控制主要是为了提高系统的稳态精度。

It was easy to present learning problem and anxiety in PI group .

PI组易出现学习问题和焦虑；

Study on structure and properties of fluorocarbon film on PI substrate

聚酰亚胺基纳米氟碳膜的结构和性能研究

Adaptive PI Control Based on the Neuron for AC Speed Regulating Systems

交流调速系统基于神经元的自适应PI控制

A method is proposed to determine K using PI control arithmetic in this paper .

提出利用比例、积分（PI）控制算法确定K值。

Design and Application of Fuzzy Controller with PI Regulator

PI-FUZZY模糊控制器的设计及应用

Dynamic Tuning PI type Generalized Predictive Controller and Simulation Research on Reactor System

动态校正的PI型广义预测控制器及其在反应釜系统中的仿真研究

Research on PI dual-loop digital control technology for inverter supply

逆变电源PI双环数字控制技术研究

Simulation of DC motor speed regulation system based on nine-point PI controller

直流电动机调速系统九点控制器仿真

Instrument model PI B for determination of resolution of photosensitive materials

PI-B型感光材料分辨率测定仪