方法１
\author{
\IEEEauthorblockN{author1\IEEEauthorrefmark{a*}, author2\IEEEauthorrefmark{a,b}, author2\IEEEauthorrefmark{b}}
\IEEEauthorblockA{\IEEEauthorrefmark{a} School of Computer Science, The University of Tokyo, author, Japan}
\IEEEauthorblockA{\IEEEauthorrefmark{b} Department of Computer Science and Technology, Tsinghua University, Beijing, China}
\IEEEauthorblockA{{author1}@XXX.com, {author2,author3}@XXX.edu.cn}
}

方法2
\author{
\IEEEauthorblockN{author1$^{a*}$, author3$^{a,b}$, author3$^b$}
\IEEEauthorblockA{$^a$ School of Computer Science, The University of Tokyo, Tokyo, Japan}
\IEEEauthorblockA{$^b$ Department of Computer Science and Technology, Tsinghua University, Beijing, China}
\IEEEauthorblockA{{author1}@XXX.com, {author2, author3}@XXX.edu.cn}
}