% \begin{table}[!ht]
%     \centering
%     \begin{minipage}[t]{0.48\linewidth}\centering
%         \caption{Effect of $\mathcal{L}^{OT}_u$}
%         \label{tab:lambda_reg}
%         \small
%         \scalebox{0.82}{
%         \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}{*}{Setting} & \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
%             with $\mathcal{L}^{OT}_u$ & 0.2380 & 0.2455 & 0.0621 & 0.0506 & 0.1440 & 0.1315\\
%             without $\mathcal{L}^{OT}_u$ & 0.2331 & 0.2428 & 0.0610 & 0.0495 & 0.1419 & 0.1297\\
%              \bottomrule
%         \end{tabular}
%         }
%     \end{minipage}\hspace{2mm}
%     \begin{minipage}[t]{0.48\linewidth}\centering
%         \caption{Effect of $\mathcal{L}^t_u$}
%         \label{tab:lambda_text}
%         \small
%         \scalebox{0.82}{
%         \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}{*}{Setting} & \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
%             with $\mathcal{L}^t_u$ & 0.2380 & 0.2455 & 0.0621 & 0.0506 & 0.1440 & 0.1315   \\
%             without $\mathcal{L}^t_u$ & 0.2352 & 0.2436 & 0.0619 & 0.0498 & 0.1407 & 0.1282 \\
%              \bottomrule
%         \end{tabular}
%         }
%     \end{minipage}
% \end{table}


\begin{table}[!ht]
    \centering
    \begin{minipage}[t]{0.49\linewidth}\centering
        \caption{Effect of $\mathcal{L}^{OT}_u$ on recommendation task\looseness=-1}
        \label{tab:lambda_reg}
        \small
        \scalebox{0.86}{
        \begin{tabular}{c@{\hskip 0.04in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c@{\hskip 0.06in}c}
            \toprule
            \multirow{2}{*}{Setting} & \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
            with $\mathcal{L}^{OT}_u$ & \textbf{23.80} & \textbf{24.55} & \textbf{6.21} & \textbf{5.06} & \textbf{14.40} & \textbf{13.15}\\
            without $\mathcal{L}^{OT}_u$ & 23.31 & 24.28 & 6.10 & 4.95 & 14.19 & 12.97\\
             \bottomrule
        \end{tabular}
        }
    \end{minipage}\hspace{1mm}
    \begin{minipage}[t]{0.49\linewidth}\centering
        \caption{Effect of $\mathcal{L}^{t}_u$ on recommendation task\looseness=-1}
        \label{tab:lambda_text}
        \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}{*}{Setting} & \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
            with $\mathcal{L}^t_u$ & \textbf{23.80} & \textbf{24.55} & \textbf{6.21} & \textbf{5.06} & \textbf{14.40} & \textbf{13.15}\\
            without $\mathcal{L}^t_u$ & 23.52 & 24.36 & 6.19 & 4.98 & 14.07 & 12.82\\
             \bottomrule
        \end{tabular}
        }
    \end{minipage}
\end{table}