EN
L 66/142
Official Journal of the European Union
2.3.2023
Figure 3 Mass definitions
2.3.12.
“Flex fuel vehicle” means a vehicle with one fuel storage system that can run on different mixtures of two or more fuels.
2.3.13.
“Mono-fuel vehicle” means a vehicle that is designed to run primarily on one type of fuel.
2.3.14.
“Not off-vehicle charging hybrid electric vehicle” (NOVC-HEV) means a hybrid electric vehicle that cannot be charged from an external source.
2.3.15.
“Off-vehicle charging hybrid electric vehicle” (OVC-HEV) means a hybrid electric vehicle that can be charged from an external source.
2.4.
For the purposes of this Annex, the following definitions shall apply in terms of Calculations
2.4.1.
“Coefficient of determination” (r2) means:
2
r ¼1Ä
Pn
where:
Ä a0 Ä ða1 Ü xi ÞÞ2 Pn 2 i¼1 ðyi Ä yÞ
i¼1 ðyi
a0
is the axis intercept of the linear regression line
a1
is the slope of the linear regression line
xi
is the measured reference value
yi
is the measured value of the parameter to be verified
y
is the mean value of the parameter to be verified
n
is the number of values