% \begin{table}[!ht]
%     \centering
%     \begin{minipage}[t]{0.48\textwidth}\centering
%         \caption{Comparing methods producing $\pi^u$\looseness=-1}
%         \label{tab:coupling_prob}
%         \small
%         \scalebox{0.83}{
%         \begin{tabular}{c@{\hskip 0.08in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.08in}c@{\hskip 0.06in}c}
%             \toprule
%             \multirow{2}{*}{\textbf{Method}} & \multicolumn{2}{c}{\textbf{Citeulike-a}} & \multicolumn{2}{c}{\textbf{Cell Phones}} & \multicolumn{2}{c}{\textbf{MovieLens}}\\
%             \cmidrule(r){2-3}\cmidrule(lr){4-5}\cmidrule(l){6-7}
%             & R@10 & N@10 & R@10 & N@10 & R@10 & N@10\\
%             \midrule
%             \emph{Sinkhorn} & 0.2380 & 0.2455 & 0.0621 & 0.0506 & 0.1440 & 0.1315\\
%             \emph{Soft-assign} & 0.2331 & 0.2417 & 0.0618 & 0.0500 & 0.1415 & 0.1292\\
%             \emph{Diagonal} & 0.2260 & 0.2339 & 0.0581 & 0.0478 & 0.1394 & 0.1288\\
%              \bottomrule
%         \end{tabular}
%         }
%     \end{minipage}\hspace{1mm}
%     \begin{minipage}[t]{0.48\textwidth}\centering
%         \caption{Comparing between fusion methods}
%         \label{tab:fusion_method}
%         \small
%         \scalebox{0.83}{
%         \begin{tabular}{c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c}
%             \toprule
%             \multirow{2}{*}{\textbf{Method}} & \multicolumn{2}{c}{\textbf{Citeulike-a}} & \multicolumn{2}{c}{\textbf{Cell Phones}} & \multicolumn{2}{c}{\textbf{MovieLens}}\\
%             \cmidrule(lr){2-3}\cmidrule(lr){4-5}\cmidrule(lr){6-7}
%             & R@10 & N@10 & R@10 & N@10 & R@10 & N@10\\
%             \midrule
%             \emph{Adaptive} & 0.2380 & 0.2455 & 0.0621 & 0.0506 & 0.1440 & 0.1315\\
%             \emph{Mean} & 0.2335 & 0.2435 & 0.0606 & 0.0493 & 0.1417 & 0.1298\\
%             \emph{Mean-T} & 0.2289 & 0.2380 & 0.0550 & 0.0428 & 0.1404 & 0.1275\\
%              \bottomrule
%         \end{tabular}
%         }
%     \end{minipage}
% \end{table}

\begin{table}[!ht]
    \centering
    \begin{minipage}[t]{0.49\textwidth}\centering
        \caption{Comparing methods producing $\pi^u$\looseness=-1}
        \label{tab:coupling_prob}
        \small
        \scalebox{0.86}{
        \begin{tabular}{c@{\hskip 0.08in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.08in}c@{\hskip 0.06in}c}
            \toprule
            \multirow{2}{*}{\textbf{Method}} & \multicolumn{2}{c}{\textbf{Citeulike-a}} & \multicolumn{2}{c}{\textbf{Cell Phones}} & \multicolumn{2}{c}{\textbf{MovieLens}}\\
            \cmidrule(r){2-3}\cmidrule(lr){4-5}\cmidrule(l){6-7}
            & R@10 & N@10 & R@10 & N@10 & R@10 & N@10\\
            \midrule
            \emph{Sinkhorn} & \textbf{23.80} & \textbf{24.55} & \textbf{6.21} & \textbf{5.06} & \textbf{14.40} & \textbf{13.15}\\
            \emph{Soft-match} & 23.31 & 24.17 & 6.18 & 5.00 & 14.15 & 12.92\\
            \emph{Diagonal} & 22.60 & 23.39 & 5.81 & 4.78 & 13.94 & 12.88\\
             \bottomrule
        \end{tabular}
        }
    \end{minipage}\hspace{1mm}
    % \begin{minipage}[t]{0.49\textwidth}\centering
    %     \caption{Comparing fusion methods}
    %     \label{tab:fusion_method}
    %     \small
    %     \scalebox{0.86}{
    %     \begin{tabular}{c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c}
    %         \toprule
    %         \multirow{2}{*}{\textbf{Method}} & \multicolumn{2}{c}{\textbf{Citeulike-a}} & \multicolumn{2}{c}{\textbf{Cell Phones}} & \multicolumn{2}{c}{\textbf{MovieLens}}\\
    %         \cmidrule(lr){2-3}\cmidrule(lr){4-5}\cmidrule(lr){6-7}
    %         & R@10 & N@10 & R@10 & N@10 & R@10 & N@10\\
    %         \midrule
    %         \emph{Adaptive} & \textbf{23.80} & \textbf{24.55} & \textbf{6.21} & \textbf{5.06} & \textbf{14.40} & \textbf{13.15}\\
    %         \emph{Mean} & 23.35 & 24.35 & 6.06 & 4.93 & 14.17 & 12.98\\
    %         \emph{Mean-T} & 22.89 & 23.80 & 5.50 & 4.28 & 14.04 & 12.75\\
    %          \bottomrule
    %     \end{tabular}
    %     }
    % \end{minipage}
    \begin{minipage}[t]{0.49\textwidth}\centering
        \caption{Comparing interest transfer methods}
        \label{tab:interest_transfer}
        \small
        \scalebox{0.85}{
        \begin{tabular}{c@{\hskip 0.06in}c@{\hskip 0.04in}c@{\hskip 0.06in}c@{\hskip 0.04in}c@{\hskip 0.06in}c@{\hskip 0.04in}c}
            \toprule
            \multirow{2}{*}{\textbf{Method}} & \multicolumn{2}{c}{\textbf{Citeulike-a}} & \multicolumn{2}{c}{\textbf{Cell Phones}} & \multicolumn{2}{c}{\textbf{MovieLens}}\\
            \cmidrule(lr){2-3}\cmidrule(lr){4-5}\cmidrule(lr){6-7}
            & R@10 & N@10 & R@10 & N@10 & R@10 & N@10\\
            \midrule
            \emph{Proposed} & \textbf{23.80} & \textbf{24.55} & \textbf{6.21} & \textbf{5.06} & \textbf{14.40} & \textbf{13.15}\\
            \makecell{\emph{Mapping \&}\\ \emph{Fusing}} & 23.31 & 24.28 & 6.10 & 4.95 & 14.19 & 12.97\\
            \makecell{\emph{Regularization}} & 22.18 & 23.14 & 5.77 & 4.88 & 14.18 & 12.82\\
             \bottomrule
        \end{tabular}
        }
    \end{minipage}
\end{table}