模拟退火

\[\begin {case} for \end {case} \]

\[\Huge {\rm{A = }}\sum\limits_{i = 1}^n {} \frac{{{{({f_{il}}(x) - {f_{ir}}(X))}^2}}}{{{f_{il}}{{(x)}^2} + {f_{ir}}{{(X)}^2}}} \]