∑ a b ∑ a b {\displaystyle {\frac {\sum _{a}^{b}}{\sum _{a}^{b}}}}
Format lié à Chemkin :
X i = F i , in − F i , out F i , in {\displaystyle X_{i}={\frac {F_{i,{\text{in}}}-F_{i,{\text{out}}}}{F_{i,{\text{in}}}}}}
Y i = F i , out − F i , in F i , in {\displaystyle Y_{i}={\frac {F_{i,{\text{out}}}-F_{i,{\text{in}}}}{F_{i,{\text{in}}}}}}