\begin{equation}
\begin{aligned}
\mathrm{multi}\mbox{-}\mathrm{modal}&: F_k\left( v_{A}^{},v_{I}^{} \right) =\mathcal{L} _{CE}^{k}\left( v_{A}^{},v_{I}^{} \right) 
\\
\mathrm{uni}\mbox{-}\mathrm{modal}&: F_k\left( v_{I}^{} \right) =\mathcal{L} _{CE}^{k}\left( v_{I}^{} \right) 
\end{aligned}
\label{eq:loss 1}
\end{equation}
