$a={\mathbf{B}}^T{\mathbf{K}}_Y^{-1}\mathbf{B}1$, γ = A1, $b=\mathbf{B}{\mathbf{K}}_Y^{-1}y$

for n = 1 : N do

l(n) = Aμ(n)

$d^{(n)}=-b-\mathbf{D}\{a\}exp(-l^{(n)})+{\mathbf{B}}^T{\mathbf{K}}_Y^{-1}\mathbf{B}exp(-l^{(n)})$

$h_j^{(n)}(l_j)\triangleq 0.5a_{j}exp(-2l_j)+exp(-l_j)d_j^{(n)}$

$c_j^{(n)}=\text{optimum}\text{curvature}\text{of}{h}_j^{(n)}$ from [3]

L(n) = AT(−D{a}exp(−2l(n)) − D{dn}exp(−l(n)))

$c_{\mu }^{(n)}={\mathbf{A}}^T\mathbf{D}\{\gamma \}{c}^{(n)}$

${\mu }^{(n+1)}={\left[{\mu }^{(n)}+\frac{-L^{(n)}-\beta \nabla R{\mid }_{{\mu }^{(n)}}}{c_{\mu }^{(n)}+\beta {\nabla }^{2}R{\mid }_{{\mu }^{(n)}}}\right]}_{+}$

end for