\author{

\IEEEauthorblockN{name1 name1\IEEEauthorrefmark{1}\IEEEauthorrefmark{2},  name2 name2\IEEEauthorrefmark{3}, name3 name3\IEEEauthorrefmark{1}\IEEEauthorrefmark{2}} 

  

\IEEEauthorblockA{\IEEEauthorrefmark{1}Department of Computer Science and Technology, Tsinghua University, Beijing, China} 

\IEEEauthorblockA{\IEEEauthorrefmark{2}Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China} 

\IEEEauthorblockA{\IEEEauthorrefmark{3}China national petroleum corporation} 

}