如题，考虑如下的MWE：

elegantbook.cls可以在这里获取。

\begin{filecontents*}[overwrite]{refs.bib}
@book{anima,
  author       = {Aristotle},
  title        = {De Anima},
  date         = 1907,
  editor       = {Hicks, Robert Drew},
  publisher    = cup,
  location     = {Cambridge},
  keywords     = {primary},
  langid       = {english},
  langidopts   = {variant=british},
  annotation   = {A \texttt{book} entry with an \texttt{author} and an \texttt{editor}},
}
\end{filecontents*}
\documentclass[11pt]{elegantbook}
\title{An Elegant \LaTeX{} Template for Books}
\subtitle{Classic Elegant\LaTeX{} Template}
\author{Ethan Deng, Liam Huang, syvshc, sikouhjw \& Osbert Wang}
\institute{Elegant\LaTeX{} Program}
\date{Dec. 31, 2022}
\version{4.5}
\bioinfo{Bio}{Information}
\extrainfo{\textcolor{red}{\bfseries Caution: This template will no longer be maintained since January 1st, 2023.}}
\logo{example-image-duck.pdf}
\cover{example-image-duck.pdf}
\ExecuteBibliographyOptions{backref=true}% add backref support here
\addbibresource{refs.bib}% bib
\begin{document}

\frontmatter

\maketitle%<-

\mainmatter

\lipsum[1-10]

\section{Bibliography}

This template uses biblatex to generate the bibliography, the default citestyle and bibliography style are both \lstinline{numeric}. Let's take a glance at the citation effect. ~\cite{anima} use data from a major peer-to-peer lending

In order to get the editors' auto-completion working, you need to add following code in your preamble:

\lipsum

\printbibliography[heading=bibintoc, title=\ebibname]

\end{document}

情况一：

含有\maketitle，文末参考文献的索引将错误地跳转到「封面首页」

情况二：

如果去掉\maketitle，则行为符合预期

问题：

• 这种现象出现的原因是什么？
• 在不改动「elegantbook.cls」的绝对前提下，修复\ExecuteBibliographyOptions{backref=true}在添加了\maketitle时功能的最佳实践是？

Edited

一点探索，基本文档类book使用\maketitle不会有这个问题：

\begin{filecontents*}[overwrite]{refs.bib}
@book{anima,
  author       = {Aristotle},
  title        = {De Anima},
  date         = 1907,
  editor       = {Hicks, Robert Drew},
  publisher    = cup,
  location     = {Cambridge},
  keywords     = {primary},
  langid       = {english},
  langidopts   = {variant=british},
  annotation   = {A \texttt{book} entry with an \texttt{author} and an \texttt{editor}},
}
\end{filecontents*}
\documentclass[11pt]{book}
\usepackage{lipsum}
\title{test}
\usepackage[backref=true]{biblatex}
\addbibresource{refs.bib}% bib
\usepackage{hyperref}
\begin{document}

\frontmatter

\maketitle%<-

\mainmatter

\lipsum[1-10]

\section{Bibliography}

This template uses biblatex to generate the bibliography, the default citestyle and bibliography style are both Let's take a glance at the citation effect. ~\cite{anima} use data from a major peer-to-peer lending.

\lipsum

\printbibliography

\end{document}

因此问题应该出在elegantbook自定义的封面命令中....

共有L,R两个选项，需求预期： 1.0. 输入{ mode={ L, R } }，得到{ L=true, R=true }； 1.1. 输入{ mode=L }，得到{ L=true } (R=false可有可无，下同)； 1.2. 输入{ mode=R }，得到{ R=true }； 希望选项输入时mode=可以省略，即： 2.0. 输入{ L, R }，得到{ L=true, R=true }； 2.1. 输入{ L }，得到{ L=true } (R=false可有可无，下同)； 2.2. 输入{ R }，得到{ R=true }；

又增加需求预期： 0.0. 不输入，得到{ L=true, R=true }； 使用.initial:n = { L, R }会妨碍单独输入{ (mode=)L/R }的功能，应该如何解决？

再增加需求预期： 3.1. 输入{ L=false }，得到{ L=false, R=true }； 3.2. 输入{ R=false }，得到{ L=true , R=false }； 应该如何解决？

2026.01.18更新：

已解决

更新了思路：

\tl_new:N \l__l_tl
\tl_new:N \l__r_tl
\bool_new:N \l__l_bool
\bool_new:N \l__r_bool
\keys_define:nn { mymodule }
  {
    L .code:n     = { \tl_set:Ne \l__l_tl { \fp_compare_p:n {#1} } },
    L .default:n  = { true },
    R .code:n     = { \tl_set:Ne \l__r_tl { \tl_to_bool_p:n {#1} } },
    R .default:n  = { true },
  }
\keys_set:nn { mymodule } { }
\tl_if_empty:NTF \l__l_tl
  { \bool_set:Nn \l__l_bool { \bool_lazy_or_p:nn { \tl_if_empty_p:N \l__r_tl } { ! \l__r_tl } } }
  { \bool_set_eq:NN \l__l_bool \l__l_tl }
\tl_if_empty:NTF \l__r_tl
  { \bool_set:Nn \l__r_bool { \bool_lazy_or_p:nn { \tl_if_empty_p:N \l__l_tl } { ! \l__l_tl } } }
  { \bool_set_eq:NN \l__r_bool \l__r_tl }
\typeout {=====~L:~\bool_to_str:N \l__l_bool,~R:~\bool_to_str:N \l__r_bool~=====}

赋值后： 如果L为空，则取R的值： 若R也为空，即均为空，应均为true，L=true； 若R不为空，则取反，L=!R； 伪代码应为

L = \bool_lazy_or_p:nn
      { \tl_if_empty_p:N R } %若为空则L=true，且短路(不短路对empty取反会报错)
      { !R }                 %若不为空则取反

另外用了个语法糖：

\bool_set:Ne \l__L_bool { \fp_compare_p:n #1 }

interface3 30.13：(在fp表达式中) true false: Other names for 1 and +0.

推荐补充者使用：

• 项目名称/仓库
• 项目简单介绍
• 自己的一些comment

的结构组织内容....

注意到在 RIS 文件中 Article number 被放到了 SP 字段（如下），这个字段的含义大概是 start page。这应该也是错误的。

TY  - JOUR
AU  - Han, Liuliu
AU  - Wang, Jin
AU  - Peter, Nicolas J.
AU  - Maccari, Fernando
AU  - Kovács, András
AU  - Schwaiger, Ruth
AU  - Gutfleisch, Oliver
AU  - Raabe, Dierk
PY  - 2025
DA  - 2025/03/11
TI  - Magnetic and mechanical hardening of nano-lamellar magnets using thermo-magnetic fields
JO  - Nature Communications
SP  - 2423
VL  - 16
IS  - 1
AB  - High-performance magnetic materials based on rare-earth intermetallic compounds are critical for energy conversion technologies. However, the high cost and supply risks of rare-earth elements necessitate the development of affordable alternatives. Another challenge lies in the inherent brittleness of current magnets, which limits their applications for high dynamic mechanical loading conditions during service and complex shape design during manufacturing towards high efficiency and sustainability. Here, we propose a strategy to simultaneously enhance the magnetic and mechanical performance of a rare-earth-free multicomponent magnet. We achieve this by introducing nano-lamellar structures with high shape anisotropy into a cobalt–iron–nickel–aluminum material system through eutectoid decomposition under externally applied thermo-magnetic fields. Compared to the conventional thermally activated processing, the thermo-magnetic field accelerates phase decomposition kinetics, producing finer lamellae spacings and smaller eutectoid colonies. The well-tailored size, density, interface, and chemistry of the nano-lamellae enhance their pinning effect against the motion of both magnetic domain walls and dislocations, resulting in concurrent gains in coercivity and mechanical strength. Our work demonstrates a rational pathway to designing multifunctional rare-earth-free magnets for energy conversion devices such as high-speed motors and generators operating under harsh service conditions.
SN  - 2041-1723
UR  - https://doi.org/10.1038/s41467-025-57571-6
DO  - 10.1038/s41467-025-57571-6
ID  - Han2025
ER  - 

如果利用 doi2bib 工具，则会发现参考文献中没有 Article number 2423，如下。

@article{Han2025,
  title = {Magnetic and mechanical hardening of nano-lamellar magnets using thermo-magnetic fields},
  volume = {16},
  ISSN = {2041-1723},
  url = {http://dx.doi.org/10.1038/s41467-025-57571-6},
  DOI = {10.1038/s41467-025-57571-6},
  number = {1},
  journal = {Nature Communications},
  publisher = {Springer Science and Business Media LLC},
  author = {Han,  Liuliu and Wang,  Jin and Peter,  Nicolas J. and Maccari,  Fernando and Kovács,  András and Schwaiger,  Ruth and Gutfleisch,  Oliver and Raabe,  Dierk},
  year = {2025},
  month = mar 
}

y=sqrt{16/(x+2)^2-(x-2)^2}

的图像时最右端部分无法闭合，定义域已正确设置，请问有谁指定是什么地方有问题吗？

\begin{equation}
    \begin{aligned}
        \min _{a_{i}^{*}, a_{i}} \frac{1}{2} \sum_{i=1}^{n} \sum_{j=1}^{n} & \left(a_{i}^{*}-a_{i}\right)\left(a_{j}^{*}-a_{j}\right) \phi_{Z}\left(X_{i}\right)^{T} \phi_{Z}\left(X_{j}\right)-\sum_{i=1}^{n}\left[y_{i}\left(a_{i}^{*}-a_{i}\right)-\varepsilon\left(a_{i}^{*}+a_{i}\right)\right], \\
        \text { s.t. } \quad & \sum_{i=1}^{n}\left(a_{i}^{*}-a_{i}\right)=0, \\
        & 0 \leq a_{i}^{*}, a_{i} \leq C, \\
        & \phi_{Z}\left(X_{i}\right)^{T} \phi_{Z}\left(X_{j}\right)=\varphi\left(K_{D E K F}\left(X_{i}, Z\right)\right)^{T} \varphi\left(K_{D E K F}\left(X_{j}, Z\right)\right), \\
        & =\left\langle\varphi\left(K_{D E K F}\left(X_{i}, Z\right)\right), \varphi\left(K_{DEKF}\left(X_{j}, Z\right)\right)\right\rangle, \\
        & =K\left(K_{D E K F}\left(X_{i}, Z\right), K_{D E K F}\left(X_{j}, Z\right)\right),
    \end{aligned}
    \label{eq:6}
\end{equation}

具体代码可见：https://github.com/ElegantLaTeX/ElegantBook/blob/master/elegantbook.cls#L911-L1037

本问题的需求是：在不改变现有的frozen版本的elegantbook.cls的前提下，希望给其增加「cleveref」功能。

一点探索：

既然elegantbook.cls是基于tcolorbox的，因此首先一定要先在tcolorbox里实现cleveref的功能。查阅文档得知，大约有两套方案：

• 基于cleveref(2018年以来不再更新，经常与hyperref的功能起冲突)
• 基于zref-clever

对于方案一：

一个最小例子如下：

\documentclass[12pt]{article} 
\usepackage[
    noheadfoot,
    margin=8mm,
    papersize={10cm,10cm},
]{geometry} 
\usepackage{cleveref}
\usepackage{tcolorbox}
\newtcolorbox[
    auto counter,
    number within=section,
    crefname={bluebox}{blueboxes}
]{mybluebox}[2][]{
    % label is label,% default value
    colback=blue!5!white,
    colframe=blue!75!black,
    fonttitle=\bfseries,
    title=Bluebox \thetcbcounter: #2,#1
}
\begin{document} 
\section{Blue}

\begin{mybluebox}[label={myreference}]{My title} 
This is an example.
\end{mybluebox}

\begin{mybluebox}[label={myreference2}]{My titletitle} 
This is an example.
\end{mybluebox}

\noindent
\Cref{myreference}, \cref{myreference}.\\ 
\Cpageref{myreference}, \cpageref{myreference}.\\ 
\nameCref{myreference}, \namecref{myreference}.\\ 
\labelcref{myreference}, \labelcpageref{myreference}.\\ 
\Cref{myreference2}, \cref{myreference2}\\
\Cref{myreference,myreference2}, \cref{myreference,myreference2}\\

\end{document}

对于方案二：

\documentclass[12pt]{article} 
\usepackage[
    noheadfoot,
    margin=8mm,
    papersize={10cm,10cm},
]{geometry} 
\usepackage{zref-clever}
\zcRefTypeSetup{mybluebox}{
    Name-sg = Bluebox , 
    name-sg = bluebox , 
    Name-pl = Blueboxes ,
    name-pl = blueboxes ,
}
\usepackage{tcolorbox}
\newtcolorbox[
    auto counter,
    number within=section,
]{mybluebox}[2][]{
    label type=mybluebox,
    colback=blue!5!white,
    colframe=blue!75!black,
    fonttitle=\bfseries,
    title=Bluebox \thetcbcounter: #2,#1
}
\begin{document} 
\section{Blue}

\begin{mybluebox}[label={myreference}]{My title} 
This is an example.
\end{mybluebox}

\begin{mybluebox}[label={myreference2}]{My titletitle} 
This is an example.
\end{mybluebox}

\noindent
\zcref{myreference}.\\ 
\zcpageref{myreference}.\\ 
\zcref[S]{myreference}.\\
\zcref[S]{myreference,myreference2}.\\
\zcref{myreference,myreference2}.\\

\end{document}

现在的核心问题是，由于elegantbook已经停止维护了，最好是在不改变elegantbook.cls(v4.5)当前架构的大前提下，在main.tex下通过类似/.append style或者覆盖现有配置等方式实现对「定理类环境」的「cleveref」功能。

由于在这里使用了共同的接口\ELEGANT@newtheorem,我个人感觉无论是：

• 想在init options里传入cleveref的crefname选项
• 或者想在类似thmstyle样式里加入label type的zref-clever方案

都不太轻松...

一个可供测试的MWE如下：

注意这里的\documentclass{elegantbook}用的就是这个官方唯一指定的v4.5文件，不允许对.cls文件做任何修改

\documentclass[lang=cn,fontset=fandol]{elegantbook}
\geometry{paperheight=12cm}
\usepackage{cleveref}
% \usepackage{zref-clever}
% \zcRefTypeSetup{mytheorem}{Name-sg={定理},Name-pl={定理}}
% \zcRefTypeSetup{mylemma}{Name-sg={引理},Name-pl={引理}}

\begin{document}
\chapter{111}

\begin{theorem}{欧拉定理}{Euler}
    这是一个定理。
\end{theorem}

\cref{lem:Osbert} 

\cref{lem:Wong}

\cref{lem:Osbert,lem:Wong}

% \zcref{lem:Osbert} 

% \zcref{lem:Wong}

% \zcref{lem:Osbert,lem:Wong}

\chapter{222}

\begin{lemma}{Osbert引理}{Osbert}
    这是一个引理。
\end{lemma}

\begin{theorem}{欧几里得公理}{Euclide}
    这是另一个定理。
\end{theorem}

\cref{thm:Euler}

\cref{thm:Euclide} 

\cref{thm:Euler,thm:Euclide}

% \zcref{thm:Euler}

% \zcref{thm:Euclide} 

% \zcref{thm:Euler,thm:Euclide}

\chapter{333}
\begin{lemma}{Wong引理}{Wong}
    这是一个引理。
\end{lemma}

\end{document}

当然，也希望该功能可以加入2026年可能有希望短暂(复活)的elegantbook更新中....

\documentclass{ctexbeamer}
\usepackage{tikz}
\usetikzlibrary{calc}
\setbeamertemplate{footline}{
   %\hspace*{-0.2pt}%
  \begin{tikzpicture}
    \def\r{1pt}
    \def\d{0.3pt}
    \coordinate (A) at (0,1.3em);
    \coordinate (B) at ($(A)+(0:{\paperwidth-(\r)-(\d)})$);
    \draw[red] (A)--(B);
    \fill[fill=white,line width=\d] (B) circle (\r);
    \node[anchor=south west,inner sep=0pt,outer sep=0pt,fill=red] at (0,0){\color{white}测试测试测试};
  \end{tikzpicture}
}
\begin{document}
\begin{frame}
  测试
\end{frame}
\end{document}

lightbulb Tip: Try to fix the first error and recompile. Often one error causes many later error messages. You can to focus on fixing errors. We recommend fixing errors as soon as possible; letting them accumulate may lead to hard-to-debug and fatal errors. Learn more

If you need to see the full logs, you can still download them or view the raw logs below.

想要复刻如图所示这种带虚线的边框和上下箭头，我的代码如下:

$\arraycolsep=1pt
\begin{array}{*1l@{\hskip\arraycolsep}c@{\hskip\arraycolsep}*{12}{>{\textstyle}l}}
x^3 & + & 2^3 & = (& x & + & 2) (& x^2 & - & x &\cdot& 2 & + & 2^2) \\
\bigg\updownarrow & & \bigg\updownarrow & & \bigg\updownarrow &  & \bigg\updownarrow & \bigg\updownarrow &  & \bigg\updownarrow & &\bigg\updownarrow & & \bigg\updownarrow \\
a^3 & + & b^3 & = (&a & + & b) (& a^2 & - & a&\cdot& b & + & b^2)
\end{array}$

实现效果

请教，如何实现带虚线的边框？

\documentclass{ctexart}
\usepackage{lipsum,zhlipsum}
\usepackage{xcolor}
\usepackage{xeCJKfntef}
\newcommand{\testtext}{我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。}
\begin{document}
\CJKunderanyline*{0.5ex}{\color{cyan!10}\rule{2pt}{2.5ex}}{\zhlipsum[1]}
\CJKunderanyline*{0.5ex}{\color{cyan!10}\rule{2pt}{2.5ex}}{\lipsum[1]}

\CJKunderanyline*{0.5ex}{\color{cyan!10}\rule{2pt}{2.5ex}}{\testtext}

\CJKunderanyline*{0.5ex}{\color{cyan!10}\rule{2pt}{2.5ex}}{我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。我能吞下玻璃而不伤身体。}
\end{document}

效果如下：

盒子实现如下：

% 英文单词背景框（微调内边距，更舒展美观）
\newtcbox{\englishbox}{
    on line,
    boxrule=0pt,
    boxsep=1.5pt, % 盒内文字与边框的间距（比1pt舒展、比2pt紧凑）
    top=1pt,
    bottom=1pt,
    left=3pt, % 盒左侧内边距（比2pt更舒展）
    right=3pt, % 盒右侧内边距（比2pt更舒展）
    colback=cyan!10,
    colframe=cyan!10,
    arc=3pt,
    enhanced jigsaw
}

% 核心命令（保留你原有的写法）
\newcommand{\wordbox}[2]{%
    \englishbox{\textbf{#1}}% 
    \textcolor{blue!70!black}{(#2)}% 
}

目前绘制的效果如下：

代码如下：

\documentclass{ctexbook}
\usepackage{circuitikz}

\begin{document}

\begin{circuitikz}[european]
    \draw(0,0)to[rmeter,t=A](0,2)to[R,l_=$R$](3,2)to[pR,l_=$R'$,n=pr](5,2);
    \draw(0,0)to[normal open switch](6,0)|-(pr.wiper);
\end{circuitikz}

\end{document}

不知道去除多余的线，不知道怎么调元件的位置。

\documentclass{exam-zh}
\begin{document}
% 设置试卷标题和科目
\title{数学测试}
\subject{数学}
\maketitle
% 第一道选择题
\begin{question}
$1 + 1 = $ \paren[C]
\end{question}
\end{document}

取消\subject{}，没有报错。

LaTeX Font: Font shape `TU/SimHei(0)/b/n' undefined
(Font)  using `TU/SimHei(0)/m/n' instead.

不知道是什么原因，就是想解决他。

• 模板文档类 ieeecolor.cls

• 模板示例代码 generic-color.tex

• 模板文件说明文档 generic-color.pdf

\documentclass[journal,twoside,web]{ieeecolor}
\usepackage{generic}
\usepackage{cite}
\begin{filecontents*}[overwrite]{refs.bib}
@article{mahon2017sg,
  title = {{The {5G} effect on {RF} filter technologies}},
  volume = {30},
  number = {4},
  journal = {{IEEE Transactions on Semiconductor Manufacturing}},
  author = {Mahon, Steven},
  year = {2017},
  pages = {494--499},
  doi={10.1109/TSM.2017.2757879},
}
@article{lee2018spectrum,
  title = {{Spectrum for {5G}: {Global} status, challenges, and enabling technologies}},
  volume = {56},
  number = {3},
  journal = {{IEEE Communications Magazine}},
  author = {Lee, Juho and Tejedor, Erika and Ranta-aho, Karri and Wang, Hu and Lee, Kyung-Tak and Semaan, Eliane and Mohyeldin, Eman and Song, Juyeon and Bergljung, Christian and Jung, Sangyeob},
  year = {2018},
  pages = {12--18},
  doi={10.1109/MCOM.2018.1700818},
}
\end{filecontents*}
\bibliographystyle{IEEEtran}
\begin{document}

Hello world\cite{mahon2017sg} ahahahha\cite{lee2018spectrum} ahaha!

\bibliography{refs}

\end{document}

这将得到：

但现在编辑要求在参考文献列表中增加「DOI」的字段信息，在当前的模板和.bib的框架下，满足编辑这一需求的最佳实践是什么？

Edit

需要指出的是，在上述链接里使用的模板根本没有考虑「DOI」的问题，但是编辑却要你考虑。

这本身就是个非常不合理的要求！！！

不是（不能、也不应该）让所有的投稿者都是「bibtex」砖家（至少我不是）

\documentclass{ctexbook}
\usepackage{titlesec,color,calc}

\newcommand{\HZSBH}{\sffamily\bfseries\Large}
\newcommand{\HYXSQS}{}

\newlength{\chapterhang}

\titleformat{\chapter}[hang]
  {\raggedleft\HZSBH\HYXSQS\color[cmyk]{1,1,0,0}}
  {第\thechapter 章}
  {1em}
  {\setlength{\chapterhang}{\widthof{第\thechapter 章}+1em}% 改动：+3em
   \makebox[0pt][r]{%
     \parbox[t]{\dimexpr\linewidth-\chapterhang-1em\relax}{%
       \setlength{\parindent}{0pt}%
       \parshape=2
         0pt \hsize
         \chapterhang \dimexpr\hsize-\chapterhang\relax
     }}}

\titlespacing{\chapter}{0mm}{-6mm}{30mm}

\begin{document}
\chapter{这是一个很长的章节标题\\ 需要自动换行}
\chapter{TCP服装参数优化}
\end{document}

\documentclass{article}
\usepackage[pdftex]{graphicx}
\usepackage{asymptote}
\begin{document}
    Hello.  
    I like to make pics with Asymptote like this one:
    \begin{figure}[h]
        \begin{asy}
        import graph;
        size(1inch);
        filldraw(circle((0,0),1),yellow,black);
        fill(circle((-.3,.4),.1),black);
        fill(circle((.3,.4),.1),black);
        draw(arc((0,0),.5,-140,-40));
        \end{asy}
    \end{figure}
    \par It makes me happy, 
    since I can still type my normal LaTeX stuff around it: 
    \(\int_0^{\pi}{\sin{x}}\,dx=2\)
\end{document}

如果编译成功，pdf应为这样：

但我用自己的TeXstudio编译，asymptote的图却无法显示.

在文件夹中生成了一个.Asy文件

打开这个.Asy的文档，里面内容如下：

if(!settings.multipleView) settings.batchView=false;
settings.tex="pdflatex";
defaultfilename="例1-1";
if(settings.render < 0) settings.render=4;
settings.outformat="";
settings.inlineimage=true;
settings.embed=true;
settings.toolbar=false;
viewportmargin=(2,2);

import graph;
size(1inch);
filldraw(circle((0,0),1),yellow,black);
fill(circle((-.3,.4),.1),black);
fill(circle((.3,.4),.1),black);
draw(arc((0,0),.5,-140,-40));

求助大佬，有什么建议和解决方法吗？非常感谢