画图代码如下：

%!TEX TS-program = xeLaTeX
%!TEX encoding = UTF-8 Unicode

\documentclass[10pt,tikz,border=1]{standalone}
\PassOptionsToPackage{noopticals, mathlf, roundv}{MinionPro}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{calc,positioning}
\usetikzlibrary{
arrows, 
decorations.pathmorphing, 
backgrounds, 
fit, 
positioning, 
petri}

\begin{document}
	\begin{tikzpicture}[%
	>={Latex[width=2mm,length=2mm]},	
base/.style = { 
	minimum width=1cm, 
	minimum height=0.5cm,
	text centered, 
	font=\sffamily},		
neuron1/.style={
	circle,
	draw,
	inner sep=0pt,
	minimum size=8mm},
activityStarts/.style = {
	base, 
	fill=blue!30},	
zol/.style = {
	rectangle, 
	rounded corners, 
	draw=black,
	minimum width=4cm, 
	minimum height=1cm,
	text centered, 
	font=\sffamily}
]
  
\foreach \y in {3,...,1}
    \node (l\y) [neuron1] at (-2.5, 1.5+\y * 1) {$a_{\y}$};   
      
\foreach \y in {6,...,1}
	\node (m\y) [neuron1] at (0, \y * 1) {$b_{\y}$};

\foreach \y in {6,...,1}
    \node (n\y) [neuron1] at (2.5, \y * 1) {$c_{\y}$};

\foreach \y in {5,...,1}
    \node (r\y) [neuron1] at (5, 1+\y * 1) {$d_{\y}$};   

\foreach \y in {4,...,1}
    \node (p\y) [neuron1] at (7.5, 1+\y * 1) {$e_{\y}$};  
              
\foreach \y in {4,...,1}
    \node (q\y) [neuron1] at (9.5, 1+\y * 1) {$f_{\y}$};              
          
    \node (a0) [zol,activityStarts,right=of q4,xshift=0.5cm, yshift=0.5cm] {$z = x+y
$};
    \node (a1) [zol,activityStarts,right=of q4,xshift=0.5cm,yshift=-0.5cm] {$z = x+y$};
    \node (a2) [zol,activityStarts,right=of q4,xshift=0.5cm,yshift=-1.5cm] {$z = x+y$};
    \node (a3) [zol,activityStarts,right=of q4,xshift=0.5cm,yshift=-2.5cm] {$z = x+y$};     
    \node (a4) [zol,activityStarts,right=of q4,xshift=0.5cm,yshift=-3.5cm] {$z = x+y$};     
       
    \foreach \x in {3,...,1}
    \foreach \y in {6,...,1}
        \draw[-] (l\x) to (m\y);


    \foreach \x in {6,...,1}
    \foreach \y in {6,...,1}
        \draw[-] (m\x) to (n\y);
        
    \foreach \x in {6,...,1}
    \foreach \y in {5,...,1}
        \draw[-] (n\x) to (r\y);
        
	\begin{scope}[on background layer]
		\node (back1) [fill = black!10, rounded corners, fit =(m1)(m2)(m3)(m4)(m5)(m6)(n1)(n2)(n3)(n4)(n5)(n6)] {};
	\end{scope}    
    
     \foreach \x in {5,...,1}
     \foreach \y in {4,...,1}
        \draw[-] (r\x) to (p\y);
        
     \foreach \x in {4,...,1}
     \foreach \y in {4,...,1}
        \draw[-] (p\x) to (q\y);   
             
     \foreach \x in {4,...,1}
     \foreach \y in {1.5, 2.5, 3.5, 4.5, 5.5}
        \draw (q\x) -- (11.4,\y);           

	\end{tikzpicture} 
\end{document}

编译结果如下：