changed the ewald figure

Author: samarjeet

paper/basic_training.pdf

@@ -1071,8 +1071,8 @@ \subsubsection{ Ewald Summation}
 
 \begin{figure}[h]
 \centering
-\includegraphics[width=\linewidth]{charges_ewald.pdf}
-    \caption{Point charges can be split into Direct space and reciprocal space charges. Direct space charge consists of the original charges and gaussian-distributed screening charge. Reciprocal space charge is only the gaussian-distributed charge.}
+\includegraphics[width=\linewidth]{ewald.pdf}
+    \caption{Screening charge distribution. (top) Original charge distribution. (bottom)Point charges can be split into Direct space(blue) and Reciprocal space charges(red). Direct space charge consists of the original charges and gaussian-distributed screening charge. Reciprocal space charge is only the gaussian-distributed charge. }
 \label{charges_ewald}
 \end{figure}