\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}
}
