Sandkasse/jcs

$THR={\frac {IRF_{\text{i}}}{\sum _{H_{\text{j}}}\left(D_{\text{j}}+E_{\text{ij}}\right)\sum _{A_{\text{k}}}C_{\text{jk}}\times F_{\text{ik}}}}$

${IRF_{\text{i}}}$

${\sum _{H_{\text{j}}}\left(D_{\text{j}}+E_{\text{ij}}\right)\sum _{A_{\text{k}}}C_{\text{jk}}\times F_{\text{ik}}}$