sigma

n.

希腊字母表的第十八字母（∑，σ）；

复数：sigmas

six sigma六标准差

1. Summations are almost invariably indicated ellipses instead of the more prevalent sigma notation.
   在表示“连加”的式子中，几乎一成不变地使用省略号来代替更为流行的“∑”符号。

Understanding Delta-Sigma Data Converters
14-3-3 sigma is a p53-regulated inhibitor of G2/M progression
The sigma 70 family: sequence conservation and evolutionary relationships.
Understanding Delta-Sigma Data Converters: John Wiley & Sons
A Use of Double Integration in Sigma Delta Modulation
Sigma-point kalman filters for probabilistic inference in dynamic state-space models
Structure and function of bacterial sigma factors.
Sigma-1 receptor chaperones at the ER-mitochondrion interface regulate Ca(2+) signaling and cell survival
Sigma-point Kalman filtering for battery management systems of LiPB-based HEV battery packs : Part 2: Simultaneous state and paramet...
Signal transduction and regulatory mechanisms involved in control of the sigma(S) (RpoS) subunit of RNA polymerase