\input{figures/figure-theme.tex}
\begin{center}
\begin{tikzpicture}[aml figure]
\amlfigurepalette
\foreach \r/\dy in {5.2/0.70,4.2/0.50,3.2/0.33,2.3/0.20,1.4/0.10,0.65/0.02}{
  \draw[FigureLine,rotate=25,line width=.8pt] (0,\dy) ellipse ({\r} and {\r*0.45});
}
\coordinate (p1) at (-4.4,-2.0);
\coordinate (p2) at (-3.5,-1.0);
\coordinate (p3) at (-2.5,-1.35);
\coordinate (p4) at (-1.8,-0.65);
\coordinate (p5) at (-1.15,-0.82);
\coordinate (p6) at (-0.70,-0.38);
\coordinate (p7) at (-0.35,-0.30);
\coordinate (p8) at (-0.08,-0.08);
\foreach \i in {1,...,7}{
  \draw[-stealth,FigureCoral,line width=1.2pt] (p\i) -- (p\the\numexpr\i+1\relax);
}
\fill[FigureInk] (0,0) ellipse (0.10 and 0.05);
\node[font=\footnotesize,fill=FigureWarm,rounded corners=1pt,inner sep=2pt] at (0.72,0.25){最小值};
\node[font=\footnotesize,FigureCoral] at (-3.8,-2.25){参数更新路径};
\end{tikzpicture}
\end{center}
