
%%% outline
%-------------------------------------------------------------------------
\begin{tikzpicture}
\tikzstyle{opt}=[minimum height=1em,minimum width=5em,rounded corners=2pt,thick]

\node[opt] (opt1_0) at (0,0) {固定操作};
\node[draw,anchor=south,opt,fill=green!20] (opt1_1) at ([yshift=0.8em]opt1_0.north) {操作3};
\node[draw,anchor=south,opt,fill=cyan!20] (opt1_2) at ([yshift=0.8em]opt1_1.north) {操作2};
\node[anchor=south,opt] (opt1_3) at ([yshift=0.8em]opt1_2.north) {固定操作};
\node[draw,anchor=south,opt,fill=yellow!20] (opt1_4) at ([yshift=0.8em]opt1_3.north) {操作4};
\node[anchor=south,opt] (opt1_5) at ([yshift=0.8em]opt1_4.north) {$\cdots$};
\node[draw,anchor=south,opt,fill=blue!10] (opt1_6) at ([yshift=0.8em]opt1_5.north) {操作1};
\node[anchor=south,opt] (opt1_7) at ([yshift=0.8em]opt1_6.north) {};

\node[opt] (opt2_0) at (3,0) {固定操作};
\node[draw,anchor=south,opt,fill=blue!10] (opt2_1) at ([yshift=0.8em]opt2_0.north) {操作1};
\node[draw,anchor=south,opt,fill=green!20] (opt2_2) at ([yshift=0.8em]opt2_1.north) {操作3};
\node[anchor=south,opt] (opt2_3) at ([yshift=0.8em]opt2_2.north) {固定操作};
\node[draw,anchor=south,opt,fill=red!20] (opt2_4) at ([yshift=0.8em]opt2_3.north) {操作5};
\node[anchor=south,opt] (opt2_5) at ([yshift=0.8em]opt2_4.north) {$\cdots$};
\node[draw,anchor=south,opt,fill=cyan!20] (opt2_6) at ([yshift=0.8em]opt2_5.north) {操作2};
\node[anchor=south,opt] (opt2_7) at ([yshift=0.8em]opt2_6.north) {};

\node[opt] (opt3_0) at (6,0) {固定操作};
\node[draw,anchor=south,opt,fill=yellow!20] (opt3_1) at ([yshift=0.8em]opt3_0.north) {操作4};
\node[draw,anchor=south,opt,fill=cyan!20] (opt3_2) at ([yshift=0.8em]opt3_1.north) {操作2};
\node[anchor=south,opt] (opt3_3) at ([yshift=0.8em]opt3_2.north) {固定操作};
\node[draw,anchor=south,opt,fill=yellow!20] (opt3_4) at ([yshift=0.8em]opt3_3.north) {操作4};
\node[anchor=south,opt] (opt3_5) at ([yshift=0.8em]opt3_4.north) {$\cdots$};
\node[draw,anchor=south,opt,fill=red!20] (opt3_6) at ([yshift=0.8em]opt3_5.north) {操作5};
\node[anchor=south,opt] (opt3_7) at ([yshift=0.8em]opt3_6.north) {};

\begin{pgfonlayer}{background}
\node[draw,fill=yellow!20,rounded corners=6pt,inner ysep=2.6em,inner xsep=2.6em] [fit=(opt1_0) (opt3_7)](box4){};
\node[draw,fill=gray!10,rounded corners=2pt,inner sep=8pt] [fit=(opt1_0) (opt1_7)](box1){};
\node[draw,fill=gray!10,rounded corners=2pt,inner sep=8pt] [fit=(opt2_0) (opt2_7)](box2){};
\node[draw,fill=gray!10,rounded corners=2pt,inner sep=8pt] [fit=(opt3_0) (opt3_7)](box3){};
\end{pgfonlayer}


\draw[->,thick] (opt1_0) -- (opt1_1);
\draw[->,thick] (opt1_1) -- (opt1_2);
\draw[->,thick] (opt1_2) -- (opt1_3);
\draw[->,thick] (opt1_3) -- (opt1_4);
\draw[->,thick] (opt1_4) -- (opt1_5);
\draw[->,thick] (opt1_5) -- (opt1_6);

\draw[->,thick] (opt2_0) -- (opt2_1);
\draw[->,thick] (opt2_1) -- (opt2_2);
\draw[->,thick] (opt2_2) -- (opt2_3);
\draw[->,thick] (opt2_3) -- (opt2_4);
\draw[->,thick] (opt2_4) -- (opt2_5);
\draw[->,thick] (opt2_5) -- (opt2_6);

\draw[->,thick] (opt3_0) -- (opt3_1);
\draw[->,thick] (opt3_1) -- (opt3_2);
\draw[->,thick] (opt3_2) -- (opt3_3);
\draw[->,thick] (opt3_3) -- (opt3_4);
\draw[->,thick] (opt3_4) -- (opt3_5);
\draw[->,thick] (opt3_5) -- (opt3_6);

\node[] at ([xshift=-1.2em,yshift=0.2em]opt1_7){\small\bfnew{分支1}};
\node[] at ([xshift=-1.2em,yshift=0.2em]opt2_7){\small\bfnew{分支2}};
\node[] at ([xshift=-1.2em,yshift=0.2em]opt3_7){\small\bfnew{分支3}};

\node[] (input) at ([yshift=-5em]opt2_0){\small\bfnew{输入}};
\node[] (output) at ([yshift=5em]opt2_7){\small\bfnew{输出}};

\draw[->,thick,out=140,in=-30] (box4.-90) to (box1.-90);
\draw[->,thick,out=40,in=-150] (box4.-90) to (box3.-90);
\draw[->,thick] (box4.-90) -- (box2.-90);

\draw[->,thick,out=50,in=-130] (box1.90) to (box4.90);
\draw[->,thick,out=130,in=-50] (box3.90) to (box4.90);
\draw[->,thick] (box2.90) -- (box4.90);

\draw[->,thick] (input.90) -- (box4.-90);
\draw[->,thick] (box4.90) -- (output.-90);

\node[] at ([xshift=-2.8em,yshift=1.1em]box1.90){\small\bfnew{模型结构}};
\node[] at ([xshift=-0.8em]box4.0){$\cdots$};
\end{tikzpicture}




