update README.en.md.

Signed-off-by: 山东大学-刘明宏 <liuminghong@mail.sdu.edu.cn>

README.en.md

@@ -31,5 +31,5 @@ This project was developed by the Laboratory of Earth Electromagnetic Exploratio
 
 #### Gitee Feature
 
-The paper was submitted to Computers & Geosciences under the title "efficient geophysical modeling techniques for complex real geological structures".
+The paper was submitted to  _Computers & Geosciences_  under the title "Efficient geophysical modeling techniques for complex real geological structures".