diff --git a/Thesis-Slides1.pdf b/Thesis-Slides1.pdf
index 200b7c0..6eaa427 100644
Binary files a/Thesis-Slides1.pdf and b/Thesis-Slides1.pdf differ
diff --git a/Thesis-Slides1.tex b/Thesis-Slides1.tex
index 08eaf50..f53bf91 100644
--- a/Thesis-Slides1.tex
+++ b/Thesis-Slides1.tex
@@ -43,12 +43,17 @@
 \setbeamertemplate{enumerate items}[default]
 %\setbeamertemplate{section in toc}[square]
 
+}
+
+% change the style of footline
+\makeatletter
 \setbeamertemplate{footline}
 {
   \leavevmode%
   \hbox{%
   \begin{beamercolorbox}[wd=.3\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
-    \usebeamerfont{author in head/foot}\insertshortauthor~(\insertshortinstitute)
+    \usebeamerfont{author in head/foot}\insertshortauthor\ifx\insertinstitute\empty\else\expandafter
+    \ifblank\expandafter{\beamer@shortinstitute}{}{~~(\insertshortinstitute)}\fi
   \end{beamercolorbox}%
   \begin{beamercolorbox}[wd=.4\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
     \usebeamerfont{title in head/foot}\insertshorttitle \hfill
@@ -59,8 +64,7 @@
   \end{beamercolorbox}}%
   \vskip0pt%
 }
-
-}
+\makeatother
 
 %--------- 宏包  ----------
 \usepackage[UTF8,noindent]{ctex}
diff --git a/Thesis-Slides4.pdf b/Thesis-Slides4.pdf
index 948ec03..50ca93a 100644
Binary files a/Thesis-Slides4.pdf and b/Thesis-Slides4.pdf differ
diff --git a/Thesis-Slides4.tex b/Thesis-Slides4.tex
index ea4f660..9230865 100644
--- a/Thesis-Slides4.tex
+++ b/Thesis-Slides4.tex
@@ -43,25 +43,28 @@
 \setbeamertemplate{enumerate items}[default]
 %\setbeamertemplate{section in toc}[square]
 
+}
+
+% change the style of footline
+\makeatletter
 \setbeamertemplate{footline}
 {
   \leavevmode%
   \hbox{%
-  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
-    \usebeamerfont{author in head/foot}\insertshortauthor~(\insertshortinstitute)
+  \begin{beamercolorbox}[wd=.3\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
+    \usebeamerfont{author in head/foot}\insertshortauthor\ifx\insertinstitute\empty\else\expandafter
+    \ifblank\expandafter{\beamer@shortinstitute}{}{~~(\insertshortinstitute)}\fi
   \end{beamercolorbox}%
-  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
+  \begin{beamercolorbox}[wd=.4\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
     \usebeamerfont{title in head/foot}\insertshorttitle \hfill
   \end{beamercolorbox}%
-  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
+  \begin{beamercolorbox}[wd=.3\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
     \usebeamerfont{date in head/foot}\hfill\insertshortdate{}\hfill %\kern1ex
     \makebox[3em][r]{\insertframenumber\,/\,\inserttotalframenumber}\kern2ex
   \end{beamercolorbox}}%
   \vskip0pt%
 }
-
-}
-
+\makeatother
 
 %--------- 宏包  ----------
 \usepackage[UTF8,noindent]{ctex}
diff --git a/Thesis-Slides6.pdf b/Thesis-Slides6.pdf
index eb9b8e9..85d48e0 100644
Binary files a/Thesis-Slides6.pdf and b/Thesis-Slides6.pdf differ
diff --git a/Thesis-Slides6.tex b/Thesis-Slides6.tex
index 9cfca2e..23fdc3e 100644
--- a/Thesis-Slides6.tex
+++ b/Thesis-Slides6.tex
@@ -66,7 +66,12 @@
 \definecolor{darkgreen}{rgb}{0.02,0.18,0.20}
 \definecolor{footer}{rgb}{0.5,0.2,0.5}
 
-\setbeamercolor{frametitle}{fg=darkblue,bg=black!5}
+\setbeamercolor{title}{fg=darkblue}
+\setbeamercolor{subtitle}{fg=darkblue!80}
+%\setbeamercolor{institute}{fg=white}
+%\setbeamercolor{author}{fg=white}
+%\setbeamercolor{date}{fg=white}
+\setbeamercolor{frametitle}{fg=darkblue}
 \setbeamercolor{section in head/foot}{bg=black,fg=darkorange}
 \setbeamercolor{lower separation line head}{bg=darkblue}
 \setbeamertemplate{section in head/foot shaded}{\color{lightgray}
@@ -111,21 +116,26 @@
 %  \kern1em\vskip3pt%
 %}
 
+% change the style of footline
+\makeatletter
 \setbeamertemplate{footline}
 {%
   \leavevmode%
   \begin{beamercolorbox}[wd=0.25\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
-    \usebeamerfont{title in head/foot} ~~\insertshortauthor~(\insertshortinstitute) \hfill
+    \usebeamerfont{title in head/foot} ~~\insertshortauthor\ifx\insertinstitute\empty\else\expandafter
+    \ifblank\expandafter{\beamer@shortinstitute}{}{~~(\insertshortinstitute)}\fi
+    \hfill
   \end{beamercolorbox}%
   \begin{beamercolorbox}[wd=0.5\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
     \usebeamerfont{title in head/foot}\centering \insertshorttitle
   \end{beamercolorbox}%
   \begin{beamercolorbox}[wd=0.25\paperwidth,ht=2.5ex,dp=1.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
     \usebeamerfont{title in head/foot} \hfill
-    \insertframenumber\,/\,\inserttotalframenumber~~%
+    \insertframenumber\,/\,\inserttotalframenumber\kern2pt%
   \end{beamercolorbox}%
   \vskip0pt%
 }
+\makeatother
 
 
 %--------- 宏包  ----------
@@ -161,17 +171,12 @@
 \setbeamerfont{institute}{family=\rmfamily}
 \setbeamerfont{author}{family=\rmfamily}
 \setbeamerfont{date}{family=\rmfamily}
-\setbeamerfont{headline}{family=\sffamily} %,series=\bfseries
+\setbeamerfont{headline}{family=\sffamily} %
 \setbeamerfont{footline}{family=\sffamily} %\kaishu
 \setbeamerfont{section in toc}{family=\rmfamily}
 \setbeamerfont{subsection in toc}{family=\rmfamily}
 \AtBeginDocument{\usebeamerfont{normal text}}
 
-\setbeamercolor{title}{fg=darkblue,bg=black!10}
-\setbeamercolor{subtitle}{fg=darkblue!80}
-%\setbeamercolor{institute}{fg=white}
-%\setbeamercolor{author}{fg=white}
-%\setbeamercolor{date}{fg=white}
 
 \setbeamertemplate{caption}[numbered]
 \numberwithin{figure}{section}