$s_2^1$

$s_2^2$

$s_1^1$

$f_1^{\mathrm{1,1}}\left({\alpha }_1^1{R}_1\mathrm{,}{\alpha }_2^1{R}_2\right)$ , $f_2^{\mathrm{1,1}}\left({\alpha }_1^1{R}_1\mathrm{,}{\alpha }_2^1{R}_2\right)$

$f_1^{\mathrm{1,2}}\left({\alpha }_1^1{R}_1\mathrm{,}{\alpha }_2^2{R}_2\right)$ , $f_2^{\mathrm{1,2}}\left({\alpha }_1^1{R}_1\mathrm{,}{\alpha }_2^2{R}_2\right)$

$s_1^2$

$f_1^{\mathrm{2,1}}\left({\alpha }_1^2{R}_1\mathrm{,}{\alpha }_2^1{R}_2\right)$ , $f_2^{\mathrm{2,1}}\left({\alpha }_1^2{R}_1\mathrm{,}{\alpha }_2^1{R}_2\right)$

$f_1^{\mathrm{2,2}}\left({\alpha }_1^2{R}_1\mathrm{,}{\alpha }_2^2{R}_2\right)$ , $f_2^{\mathrm{2,2}}\left({\alpha }_1^2{R}_1\mathrm{,}{\alpha }_2^2{R}_2\right)$