\documentclass{article}
\usepackage{com.braju.graphicalmodels}
\usepackage{amsmath}
% \special{papersize=40mm,80mm}
% \setlength{\pdfpagewidth}{40mm}
% \setlength{\pdfpageheight}{80mm}
% \usepackage[vcentering,dvips]{geometry}
% \geometry{papersize={80mm,120mm},total={80mm,120mm},margin=0mm}



\catcode`\@=11%

\pagestyle{empty}

\begin{document}
\TeXtoEPS

\LARGE
\psset{unit=10mm,arrowscale=1.5,linewidth=1.5pt}

\begin{pspicture}(0,0)(9,12)
  \SpecialCoor

  \rput(5,1){\GM@node[observed=true]{gamma}}
  \GM@label[angle=-90]{gamma}{$\gamma$}
  
  \fnode[framesize=20pt](2,3){W_1kv}
  \GM@label[angle=-180]{W_1kv}{$\boldsymbol{W}_{1,K,V}$}

  \fnode[framesize=20pt](8,3){W_Rkv}
  \GM@label[angle=0]{W_Rkv}{$\boldsymbol{W}_{R,K,V}$}

  \rput(5,3){\GM@ldots{W_2kv}}
  
  \rput(2,6){\GM@node[observed=true]{y_i1}}
  \GM@label[angle=-180]{y_i1}{$y_{i,1}$}  
  
  \rput(8,6){\GM@node[observed=true]{y_iR}}
  \GM@label[angle=0]{y_iR}{$y_{i,R}$}
  
  \rput(5,6){\GM@ldots{y_i2}}
  
  \rput(5,8){\ovalnode{z_i}{\phantom{abcd}}}
  \rput(5,8){$\boldsymbol{z}_i$}
  
  \rput(0,4.8){\GM@plate{10.5}{4.3}{N}}
  
  \rput(3,11){\rnode{mu}{\psovalbox*[fillcolor=gray]{\phantom{abcd}}}}
  \GM@label[angle=90]{mu}{$\boldsymbol{\mu}$}
  
  \rput(7,11){\rnode{Sigma}{\psframebox*[fillcolor=gray]{\phantom{C}}}}
  \GM@label[angle=90]{Sigma}{$\boldsymbol{\Sigma}$}
  
  \ncline{->}{gamma}{W_1kv}
  \ncline{->}{gamma}{W_Rkv}
  \ncline{->}{W_1kv}{y_i1}
  \ncline{->}{W_Rkv}{y_iR}
  \ncline{->}{z_i}{y_i1}
  \ncline{->}{z_i}{y_iR}
  \ncline{->}{mu}{z_i}
  \ncline{->}{Sigma}{z_i}  
  
\end{pspicture}

\endTeXtoEPS
\end{document}