我怎样才能在乳胶中绘制这个图表？

Question

请帮助我。如何我使用 tikzpicture 绘制了此图。谢谢。

Answer 1

作为起点：

\documentclass[border=3.14152]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
                chains, 
                decorations.markings,
                positioning}
\begin{document}
    \begin{tikzpicture}[
node distance = 5mm,
  start chain = going below,
            > = {Stealth[scale=0.8]},
     C/.style = {circle, draw, minimum size=1.2em, on chain},
   ->-/.style = {decoration={markings, mark=at position .25 with {\arrow{>}}},
                 ->, postaction={decorate}}
                    ]
\node (x1) [C]  {$x_1$};
\node (x2) [C]  {$x_2$};
\node (x3) [C]  {$x_3$};
    \node [on chain]    {$\vdots$};
\node (xn) [C]  {$x_n$};
%
\draw[->-]  (x1) -- ++ (3,0);
\draw[->-]  (x2) -- ++ (3,0);
\draw[->-]  (x3) -- ++ (3,0);
\draw[->-]  (xn) -- ++ (3,0);
%
\coordinate[right=12mm of x1]   (xr1);
\coordinate[right=14mm of x2]   (xr2);
\coordinate[right=16mm of x3]   (xr3);
\coordinate[right=18mm of xn]   (xrn);
\coordinate[above left=12mm of x1]   (xl1);
\coordinate[above left=14mm of x1]   (xl2);
\coordinate[above left=16mm of x1]   (xl3);
\coordinate[above left=18mm of x1]   (xln);
%
\draw[->] (xr1) |- (xl1) |- (xn.160);
\draw[->] (xr2) |- (xl2) |- (xn);
\draw[->] (xr3) |- (xl3) |- (xn.200);
\draw[->] (xrn) |- (xln) |- (x3.200);

\draw[->]   (xl1 |- x2.160) -- (x2.160);
\draw[->]   (xl1 |- x3) -- (x3);
\draw[->]   (xl2 |- x1.160) -- (x1.160);
\draw[->]   (xl2 |- x3.160) -- (x3.160);
\draw[->]   (xl3 |- x1) -- (x1);
\draw[->]   (xl3 |- x2) -- (x2);
\draw[->]   (xln |- x1.210) -- (x1.210);
\draw[->]   (xln |- x2.210) -- (x2.210);
    \end{tikzpicture}
\end{document}