标题页中的编号未出现在 dvi 文件中

Question

作者姓名在 pdf 输出中显示如下：

Ali Balador1;2, Carlos T. Calafate1, and Juan-Carlos Cano1
1Universitat Politecnica de Valencia, Spain, [email protected], {calafate, jucano}@disca.upv.es
2Halmstad University, Sweden

但在 dvi 文件中没有出现数字。该如何解决？

代码如下：

\documentclass[conference]{IEEEtran}
\hyphenation{op-tical net-works semi-conduc-tor}

\newcommand\Mark[1]{\textsuperscript{#1}}

\usepackage{graphicx}
\usepackage{flushend}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{fixltx2e}
\usepackage{epstopdf}
\usepackage{authblk}
\let\labelindent\relax
\usepackage{enumitem}
\usepackage{cmap}
\usepackage[T1]{fontenc}
\usepackage{mathptmx}
\makeatletter
\newcommand*{\rom}[1]{\expandafter\@slowromancap\romannumeral #1@}
\makeatother
\begin{document}

\title{title}
\author[Ali Balador et al.]
       {Ali Balador$^{1,2}$, Carlos T. Calafate$^1$, and Juan-Carlos Cano$^1$\\
       $^1$Universitat Politecnica de Valencia, Spain,
       [email protected], \{calafate, jucano\}@disca.upv.es\\
       $^2$Halmstad University, Sweden\\
   }
\maketitle
\end{document}