AC three phase four wire system with neutral earthed
AC three phase three wire system with earthed hull as neutral wire
earthed relaying device
tu ---the additional component of wordformation
(averaged) fundamental component
(co)variance-component-estimation
(superscript *)P-connected component
2D principal component analysis
2-Dimensional Principal Component Analysis
2-Dimensional Principal Component Analysis (2DPCA)
2-dimensional principal component analysis(2DPCA)
2DPCA(two-dimensional principal component analysis)