pi

n.

圆周率(π)；

复数：pis

pi controller比例积分控制器

1. Zu Chongzhi accurately calculated the value of pi to seven decimal places.
   祖冲之很早就把圆周率准确推算到小数点后七位。
2. Ignoring a clunky numerical system and devising his own, he demonstrated the nature of infinity and calculated a value for pi.
   他否决了当时繁冗的数字表达方式，发明出自己的数字系统，证明了自然的无穷性，并计算出圆周率的值。

Neo PI-R professional manual
PI-Calculus: A Theory of Mobile Processes
The nature of .pi.-.pi. interactions
Cation-pi interactions in chemistry and biology: a new view of benzene, Phe, Tyr, and Trp.
Cytotoxicity of human pI 7 interleukin-1 for pancreatic islets of Langerhans.
Synthetic Principles for Bandgap Control in Linear pi-Conjugated Systems.
A single ataxia telangiectasia gene with a product similar to PI-3 kinase.
Catalytic carbophilic activation: catalysis by platinum and gold pi acids.
Suppression of c-Myc-induced apoptosis by Ras signalling through PI(3)K and PKB
Phosphate (Pi) starvation effect on the cytosolic Pi concentration and Pi exchanges across the tonoplast in plant cells: an in vivo ...