
%%% outline
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\begin{tikzpicture}
\tikzstyle{node}=[minimum height=6em,inner sep=4pt,align=left,draw,font=\footnotesize,rounded corners=4pt,thick,drop shadow]

\node[node,fill=orange!30] (n1) at (0,0){\scriptsize\bfnew{超网络} \\ [1ex] 模型结构参数 \\[0.4ex] 网络参数};
\node[anchor=west,node,fill=yellow!30] (n2) at ([xshift=4em]n1.east){\scriptsize\bfnew{优化后的超网络} \\ [1ex]模型{\color{red}结构参数}（已优化） \\ [0.4ex]网络参数（已优化）};
\node[anchor=west,node,fill=red!30] (n3) at ([xshift=6em]n2.east){\scriptsize\bfnew{找到的模型结构}};

\draw[-latex,thick] (n1.0) -- node[above,align=center,font=\scriptsize]{优化后的\\超网络}(n2.180);
\draw[-latex,thick] (n2.0) -- node[above,align=center,font=\scriptsize]{根据结构参数\\离散化结构}(n3.180);
\draw[-latex,out=90,in=100,thick] ([xshift=-2em]n1.90) to node[above,font=\scriptsize]{参数优化}([xshift=2em]n1.90);
\end{tikzpicture}




