y
Trend function in Kriging model
Y
Vector of response
Z
Random field with zero mean and stationary covariance
Greek Symbols
a
Regression coefficient in Kriging model
b
Regression coefficient
c
Parameter in radial basis function
2
Error
h
Parameter of Gaussian kernel in Kriging model
l
Dynamic viscosity of fluid
m
Kinematic viscosity of fluid
q
Density of fluid
r
Variance of concentration
r 2 Error variance
r f
Process variance
/
Gaussian function for radial basis neuron
u
Polynomial basis functions
x
Nomenclature