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算法、参考文献和索引的下划线列表，带有维多利亚风格的装饰

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算法、参考文献和索引的下划线列表，带有维多利亚风格的装饰

我想在 、 和 下方放置一个维多利亚风格的装饰物 ( ) ，pgfornament 80全部居中且大写。下面是我的最小工作示例 (MWE)，但装饰物的位置令人沮丧。请帮忙。List of AlgorithmsReferencesIndex

\documentclass[a4paper,12pt]{book}
\usepackage[utf8]{inputenc}
\usepackage{lipsum}
\usepackage{algorithm2e}
\usepackage[object=vectorian]{pgfornament}
\usepackage{imakeidx}
\makeindex


\title{Question}
\author{Author}
\date{August 2021}

\begin{document}

\maketitle



\tableofcontents

\clearpage
\addcontentsline{toc}{chapter}{LIST OF ALGORITHMS} 
%\centering  {\rule{\textwidth}{1pt} \vspace{-1.5cm}} 
\renewcommand{\listalgorithmcfname}{\hfill LIST OF ALGORITHMS \hfill}

\begin{center}
   \pgfornament[width=4cm]{80}
\end{center}

{%
\let\oldnumberline\numberline%
 \renewcommand{\numberline}{\algorithmcfname~\oldnumberline}%
 \listofalgorithms 
}

\newpage
\chapter{Introduction}
\lipsum[1] \\


\begin{algorithm}[H]
\SetAlgoLined
\KwData{this text}
\KwResult{how to write algorithm with \LaTeX2e }
initialization\;
\While{not at end of this document}{
read current\;
\eIf{understand}{
go to next section\;
current section becomes this one\;
}{
go back to the beginning of current section\;
}
}
\caption{How to write algorithms}
\end{algorithm}

\section{BibTex}

This document is an example of BibTeX using in bibliography management. Three items 
are cited: \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Einstein
journal paper \cite{einstein}, and the Donald Knuth's website \cite{knuthwebsite}. 
The \LaTeX\ related items are \cite{latexcompanion,knuthwebsite}. 

\index{Einstein}

\medskip

\renewcommand{\bibname}{ REFERENCES }
\bibliographystyle{unsrt}
\bibliography{ref}

\printindex

\end{document}

答案1

您可能希望使用该titlesec包来设计您的无数\chapter标题；参见例如Titlesec 用于无数命令

因此你可以尝试这样的方法：

% Load the titlesec package
\usepackage{titlesec}

% Styling numberless chapter headings
\titleformat{name=\chapter,numberless}
  {\Huge\bfseries}
  {}{0pt}
  {\filcenter\MakeUppercase}
  [{\filcenter\pgfornament[width=4cm]{80}}]

% But you'll need to provide for numberred headings too; so
% here I'm just using the default style
\titleformat{name=\chapter}[display]
  {\Huge\bfseries}
  {\chaptername~\thechapter}{\baselineskip}
  {}

（在您的代码中，应该删除\\之后的部分）\lipsum[1]

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