%------------------------------------------------------------------------------------------------------------
%%%  基于树的解码方法 - chart-based decoding
\begin{center}
\begin{tikzpicture}
\begin{scope}%[scale=0.2]
\node [anchor=north] (ch) at (0,0) {\large{\textbf{Chart}}};

\draw [->,ublue] ([xshift=-1em,yshift=-1em]ch.south) -- ([xshift=-1em,yshift=-9em]ch.south);
\draw [->,ublue] ([xshift=-1em,yshift=-1em]ch.south) -- ([xshift=10em,yshift=-1em]ch.south);

{\small
\node [anchor=north] (l11) at ([xshift=-1.7em,yshift=-2.5em]ch.south) {{起}};
\node [anchor=north] (l12) at ([xshift=0em,yshift=0.5em]l11.south) {{始}};
\node [anchor=north] (l13) at ([xshift=0em,yshift=0.5em]l12.south) {{位}};
\node [anchor=north] (l14) at ([xshift=0em,yshift=0.5em]l13.south) {{置}};
\node [anchor=north] (l2) at ([xshift=4.5em,yshift=0.4em]ch.south) {{跨度大小}};
}

\draw [-,ublue] ([xshift=1em,yshift=-2em]ch.south) -- ([xshift=1em,yshift=-8em]ch.south);
\draw [-,ublue] ([xshift=5em,yshift=-2em]ch.south) -- ([xshift=5em,yshift=-8em]ch.south);
\draw [-,ublue] ([xshift=9em,yshift=-2em]ch.south) -- ([xshift=9em,yshift=-8em]ch.south);
\draw [-,ublue] ([xshift=1em,yshift=-2em]ch.south) -- ([xshift=9em,yshift=-2em]ch.south);
\draw [-,ublue] ([xshift=1em,yshift=-5em]ch.south) -- ([xshift=9em,yshift=-5em]ch.south);
\draw [-,ublue] ([xshift=1em,yshift=-8em]ch.south) -- ([xshift=9em,yshift=-8em]ch.south);

\node [anchor=north,rectangle,draw=red!40, inner sep=0mm,minimum height=4em,minimum width=9em,rounded corners=2pt,very thick] (n1) at ([xshift=18em,yshift=2em]ch.south) {};
\node [anchor=north,rectangle,draw=red!40, inner sep=0mm,minimum height=4em,minimum width=9em,rounded corners=2pt,very thick] (n2) at ([xshift=0em,yshift=-0.5em]n1.south) {};
\node [anchor=north,rectangle,draw=red!40, inner sep=0mm,minimum height=4em,minimum width=9em,rounded corners=2pt,very thick] (n3) at ([xshift=0em,yshift=-0.5em]n2.south) {};

\node [anchor=north] (n11) at ([xshift=0em,yshift=-0.5em]n1.north) {Cell[0,1]:};
\node [anchor=north] (n12) at ([xshift=1em,yshift=-1.2em]n11.north) {VV[0,1]};

\node [anchor=north] (n21) at ([xshift=0em,yshift=-0.1em]n2.north) {Cell[1,2]:};
\node [anchor=north] (n22) at ([xshift=1em,yshift=-1.2em]n21.north) {NN[1,2]};
\node [anchor=north] (n23) at ([xshift=0em,yshift=-1.3em]n22.north) {NP[1,2]};

\node [anchor=north] (n31) at ([xshift=0em,yshift=-0.1em]n3.north) {Cell[0,2]:};
\node [anchor=north] (n32) at ([xshift=1em,yshift=-1.2em]n31.north) {VP[0,2]};
\node [anchor=north] (n33) at ([xshift=0em,yshift=-1.3em]n32.north) {NP[0,2]};

\draw [->,blue!40,very thick] ([xshift=0em,yshift=-0.5em]n1.west) .. controls +(west:6em) and +(north:3em) .. ([xshift=-15em,yshift=-2em]n1.south);
\draw [->,blue!40,very thick] ([xshift=0em,yshift=1em]n2.west) .. controls +(west:2em) and +(north:2em) .. ([xshift=-14.5em,yshift=0em]n2.south);
\draw [->,blue!40,very thick] ([xshift=0em,yshift=-0.5em]n3.west) .. controls +(west:5em) and +(south:0.5em) .. ([xshift=-12em,yshift=5em]n3.south);
\end{scope}
\end{tikzpicture}
\end{center}