<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\chapter{å›¾è¡¨ï¼Œä¼ªä»£ç&nbsp;ï¼Œå…¬å¼ç›¸å…³æŽ’ç‰ˆ}\label{elements}

\section{å›¾çš„æŽ’ç‰ˆ}
è®ºæ–‡æ²¡å›¾è°çˆ±çœ‹å‘€ï¼ä¸”çœ‹å’±å¯¼è¨€åŒºä¸æ˜¯å·²ç»åŠ&nbsp;äº†``\\graphicspath{{figures/}}''å—ï¼Ÿæ²¡é”™ï¼Œ
ä½&nbsp;è¦åšçš„å°±æ˜¯æŠŠä½&nbsp;çš„å›¾æ”¾åˆ°``figures''æ–‡ä»¶å¤¹ä¸‹é¢ã€‚

\subsection{å•å›¾}
å•å›¾æŽ’ç‰ˆå¾ˆç®€å•ã€‚

\begin{figure}[!htb]
\centering
\begin{minipage}[t]{\oneimage}
\centering
\includegraphics[width=\oneimage]{Correct_Ratio}
\end{minipage}
\caption{The ratios between the sizes of $\bm{R}$, $\bm{C}$ and their maximal possible sizes during the attack with three pairs of plain-images,
where $k^*$ denotes the index of the attacking steps.}
\label{fig:ratio}
\end{figure}

\subsection{å¤šå›¾}
å¤šå›¾æŽ’ç‰ˆå¾ˆç®€å•ã€‚

\begin{figure}[!htb]
\centering
\begin{minipage}[t]{\twoimage}
\centering
\includegraphics[width=\twoimage]{Lenna}
a)
\end{minipage} \hspace{4pt}
\begin{minipage}[t]{\twoimage}
\centering
\includegraphics[width=\twoimage]{Lenna_e}
b)
\end{minipage}
\caption{A pair of plain-image and the corresponding cipher-image:
a) image ``Lenna''; b) cipher-image of a).}
\label{fig:APairPlaintext}
\end{figure}

\section{è¡¨æ&nbsp;¼}
çœ‹ä¸ªä¾‹å­å°±å¥½äº†ã€‚

\begin{table}[!htb]
\centering
\caption{Blocking sizes for plain-image of size $256\times 256$.}
\label{tb:blocksize}
\begin{tabular}{c|ccc}  \hline
\backslashbox{ $q_1$ }{ $q_2$ }    &amp; 0      &amp; 1       &amp; 2       \\ \hline
  0 &amp; (8,8)  &amp; (8,16)  &amp; (8,32)  \\
  1 &amp; (16,8) &amp; (16,16) &amp; (16,32) \\
  2 &amp; (32,8) &amp; (32,16) &amp; (32,32) \\ \hline
\end{tabular}
\end{table}

\section{ä¼ªä»£ç&nbsp;}
ä¼ªä»£ç&nbsp;æŽ’ç‰ˆä½¿ç”¨çš„æ˜¯è¿™æ–¹é¢æœ€æ–°çš„åŒ…algorithm2eï¼Œæˆ‘ä»¬æ¥çœ‹çœ‹ç®—æ³•\ref{qsort}ï¼ˆæ›´å¤šæ&nbsp;·ä¾‹è¯·google``algorithm2e''ï¼‰ï¼š

\begin{algorithm}[H]\label{qsort}
    \SetAlgoLined
    \KwData{this text}
    \KwResult{how to write algorithm with \LaTeX2e }
    initialization\;
    \While{not at end of this document}{
        read current\;
        \eIf{understand}{
            go to next section\;
            current section becomes this one\;
        }{
            go back to the beginning of current section\;
        }
    }
    \caption{How to write algorithms}
\end{algorithm}

\section{å…¬å¼æŽ’ç‰ˆ}
è®ºæ–‡æ²¡å…¬å¼çš„è¯ï¼Œéš¾é“ä½&nbsp;åœ¨å†™æ•£æ–‡ï¼Ÿ
å·²çŸ¥$a+b=c$ï¼Œé‚£ä¹ˆ

\begin{equation*}\label{eq:aplusb}
  a=c-b.
\end{equation*}

æ¥çœ‹å…¬å¼\ref{eq:aplusb}:

\begin{equation}\label{eq:amultib}
  a*b=c.
\end{equation}
</pre></body></html>