new update

Section04-Phrasal-and-Syntactic-Models/section04-test.tex

@@ -64,7 +64,7 @@
 \end{CJK}
 
 \setbeamerfont*{frametitle}{size=\large,series=\bfseries}
-\setbeamertemplate{navigation symbols}{\begin{CJK}{UTF8}{\mycfont} 第四章 基于短语和句法的翻译模型 \hspace*{2em} 肖桐\&朱靖波 \end{CJK} \hspace*{2em} \today \hspace*{2em} \insertframenumber{}/\inserttotalframenumber}
+\setbeamertemplate{navigation symbols}{\begin{CJK}{UTF8}{\mycfont} 第四章 基于短语和句法的统计翻译模型 \hspace*{2em} 肖桐\&朱靖波 \end{CJK} \hspace*{2em} \today \hspace*{2em} \insertframenumber{}/\inserttotalframenumber}
 
 \setbeamertemplate{itemize items}[circle] % if you want a circle
 \setbeamertemplate{itemize subitem}[triangle] % if you want a triangle
@@ -96,13 +96,16 @@
 \section{使用更大的翻译单元}
 
 %%%------------------------------------------------------------------------------------------------------------
-%%% 基于句法的模型
-\begin{frame}{引入句法信息}
-
-
+%%% 什么是短语
+\begin{frame}{何为短语？}
 
 \begin{itemize}
-\item<1-> Brown等人(1993)及Koehn等人(2003)提出了基于词串的翻译模型\\
+\item 句对可以用短语对的组合进行表示，比如下图的例子包含三个短语翻译：
+	\begin{itemize}
+	\item 进口 $\leftrightarrow$ the imports have
+	\item 大幅度 $\leftrightarrow$ drastically
+	\item 下降 了 $\leftrightarrow$ fallen
+	\end{itemize}
 
 \begin{center}
 \begin{tikzpicture}
@@ -114,30 +117,65 @@
 \node[anchor=west] (s2) at (3.5em, 0) {大幅度};
 \node[anchor=west] (s3) at (7.9em, 0) {下降 了};
 
-\node<2->[anchor=west,fill=ugreen!50] (s1) at (0, 0) {进口};
-\node<3-> [anchor=west,fill=red!50] (s2) at (3.5em, 0) {大幅度};
-\node<4-> [anchor=west,fill=blue!50] (s3) at (7.9em, 0) {下降 了};
+\node[anchor=west,fill=ugreen!50] (s1) at (0, 0) {进口};
+\node [anchor=west,fill=red!50] (s2) at (3.5em, 0) {大幅度};
+\node[anchor=west,fill=blue!50] (s3) at (7.9em, 0) {下降 了};
 
 \node[anchor=east] (t0) at (-0.5em, -1) {目标语:};
 \node[anchor=west] (t1) at (0, -1) {the imports have};
 \node[anchor=west] (t2) at (8.4em, -1) {drastically};
 \node[anchor=west] (t3) at (14.0em, -1) {fallen};
 
-\node<2-> [anchor=west,fill=ugreen!50] (t1) at (0, -1) {the imports have};
-\node<3-> [anchor=west,fill=red!50] (t2) at (8.4em, -1) {drastically};
-\node<4-> [anchor=west,fill=blue!50] (t3) at (14.0em, -1) {fallen};
-
-\path[<->, thick]<2-> (s1.south) edge (t1.north);
-\path[<->, thick]<3-> (s2.south) edge (t2.north);
-\path[<->, thick]<4-> (s3.south) edge (t3.north);
+\node[anchor=west,fill=ugreen!50] (t1) at (0, -1) {the imports have};
+\node[anchor=west,fill=red!50] (t2) at (8.4em, -1) {drastically};
+\node[anchor=west,fill=blue!50] (t3) at (14.0em, -1) {fallen};
 
-%\visible<5>{\draw[<->] (t3.south) -- (s3.north);}
+\path[<->, thick] (s1.south) edge (t1.north);
+\path[<->, thick] (s2.south) edge (t2.north);
+\path[<->, thick] (s3.south) edge (t3.north);
 
 \end{scope}
 
 \end{tikzpicture}
 \end{center}
 
+\item<2-> 显然上图中的短语并不是语言学上的短语。这里有：\\
+
+\vspace{0.3em}
+\begin{beamerboxesrounded}[upper=uppercolblue,lower=lowercolblue,shadow=true]{定义 - 短语}
+对于一个句子$\textbf{w} = w_1...w_n$，任意子串$w_i...w_j$($i \le j$, $0 \le i$, $j \le n$)都是句子$\textbf{w}$的一个\alert{短语}
+\end{beamerboxesrounded}
+
+	\begin{itemize}
+	\item $n$个词构成的句子可以有$\frac{n(n+1)}{2}$个短语
+	\end{itemize}
+
+\end{itemize}
+\end{frame}
+
+%%%------------------------------------------------------------------------------------------------------------
+%%% 什么是短语翻译推导
+\begin{frame}{双语短语}
+\begin{itemize}
+\item 进一步，可以定义 \\
+\begin{beamerboxesrounded}[upper=uppercolblue,lower=lowercolblue,shadow=true]{定义 - 句子的短语切分}
+对于一个句子$\textbf{w} = w_1...w_n$，可以被切分为$m$个子串，则称$\textbf{w}$由$m$个短语组成，记为$\textbf{w} = p_1...p_m$，其中$p_i$是$\textbf{w}$的一个短语， $p_1...p_m$也被称作句子$\textbf{w}$的一个\alert{短语切分}
+\end{beamerboxesrounded}
+
+\vspace{0.5em}
+\item<2-> 对于双语的情况 \\
+\begin{beamerboxesrounded}[upper=uppercolblue,lower=lowercolblue,shadow=true]{定义 - 双语短语(或短语对)}
+对于源语和目标语句对($\textbf{s}, \textbf{t}$)，$\textbf{s}$中短语$\tilde{s}_i$和$\textbf{t}$中的短语$\tilde{t}_j$可以构成一个双语短语对$(\tilde{s}_i,\tilde{t}_j)$，简称\alert{短语对}$(\tilde{s}_i,\tilde{t}_j)$
+\end{beamerboxesrounded}
+
+	\begin{itemize}
+	\item 比如，句对``进口 大幅度 下降 了 $\leftrightarrow$ the imports have drastically fallen''，有很多短语对，比如
+		\begin{itemize}
+		\item 大幅度 $\leftrightarrow$ drastically
+		\item 大幅度 下降 $\leftrightarrow$ have drastically fallen
+		\end{itemize}
+	\end{itemize}
+
 \end{itemize}
 \end{frame}
 

Section04-Phrasal-and-Syntactic-Models/section04.tex

@@ -71,7 +71,7 @@
 \end{CJK}
 
 \setbeamerfont*{frametitle}{size=\large,series=\bfseries}
-\setbeamertemplate{navigation symbols}{\begin{CJK}{UTF8}{\mycfont} 第四章 基于短语和句法的翻译模型 \hspace*{2em} 肖桐\&朱靖波 \end{CJK} \hspace*{2em} \today \hspace*{2em} \insertframenumber{}/\inserttotalframenumber}
+\setbeamertemplate{navigation symbols}{\begin{CJK}{UTF8}{\mycfont} 第四章 基于短语和句法的统计翻译模型 \hspace*{2em} 肖桐\&朱靖波 \end{CJK} \hspace*{2em} \today \hspace*{2em} \insertframenumber{}/\inserttotalframenumber}
 
 \setbeamertemplate{itemize items}[circle] % if you want a circle
 \setbeamertemplate{itemize subitem}[triangle] % if you wnat a triangle