diff --git a/trunk/RTCSA_SS/02Background.tex b/trunk/RTCSA_SS/02Background.tex
index f066f09..908e761 100644
--- a/trunk/RTCSA_SS/02Background.tex
+++ b/trunk/RTCSA_SS/02Background.tex
@@ -4,8 +4,8 @@
 This section describes background of Super-resolution technique, and the sensors
 we are using in this work.
 
-\subsection{Background}
-\paragraph{Super-Resolution Convolutional Neural Network}
+%\subsection{Background}
+\subsection{Super-Resolution Convolutional Neural Network}
 
 C. Dong et al.~\cite{ChaoDong16} proposed a deep learning method for single image
 super-resolution (SR). Their method learns how to directly map the low-resolution