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公式中的下括号指向文本第 2 部分

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公式中的下括号指向文本第 2 部分

这篇文章是根据找到的帖子构建的这里由 Gonzalo Medina 开发。如何让同一个公式在两个不同的页面上正确显示？在我的代码中，下括号没有放在正确的位置。

这是我的代码：

\documentclass{book}
\usepackage{amsmath,amsfonts,amssymb,amsthm}
\usepackage{mathptmx}
\usepackage{calc}
\usepackage{tikz}
\usetikzlibrary{tikzmark,calc,decorations.pathreplacing}
\usepackage{lipsum}

\begin{document}

\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{starta}P_{s~av}\tikzmark{enda}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startb}\omega_{o}W_{e}\tikzmark{endb}}%
  + \dfrac{1}{\tikzmark{startc}Q_{unl}\tikzmark{endc}}+\dfrac{P_{sig}}{\tikzmark{startd}\omega_{o}W_{e}\tikzmark{endd}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{starte}\omega_{m}\tikzmark{ende}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay]
\foreach \Value/\Length/\Text in {%
  a/15pt/{Phase\\perturbation},%
  b/40pt/{Input power\\over\\reactive power},%
  c/20pt/{Resonator $Q$},%
  d/40pt/{Signal power\\over\\reactive power},%
  e/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\lipsum[1-4]


\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{starta}P_{s~av}\tikzmark{enda}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startb}\omega_{o}W_{e}\tikzmark{endb}}%
  + \dfrac{1}{\tikzmark{startc}Q_{unl}\tikzmark{endc}}+\dfrac{P_{sig}}{\tikzmark{startd}\omega_{o}W_{e}\tikzmark{endd}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{starte}\omega_{m}\tikzmark{ende}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay]
\foreach \Value/\Length/\Text in {%
  a/15pt/{Phase\\perturbation},%
  b/40pt/{Input power\\over\\reactive power},%
  c/20pt/{Resonator $Q$},%
  d/40pt/{Signal power\\over\\reactive power},%
  e/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\end{document}

答案1

从你的问题来看，正确的位置应该在哪里有点不清楚，但我假设你也希望文本指向第一个方程中的下括号。这在你的例子中没有发生，因为你两次都使用相同的名称来标识所有内容。因此，start\value和end\value在第二个方程中被覆盖，你只会得到指向那些下括号的文本。更改标签将解决此问题。

\documentclass{book}
\usepackage{amsmath,amsfonts,amssymb,amsthm}
\usepackage{mathptmx}
\usepackage{calc}
\usepackage{tikz}
\usetikzlibrary{tikzmark,calc,decorations.pathreplacing}
\usepackage{lipsum}

\begin{document}

\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{starta}P_{s~av}\tikzmark{enda}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startb}\omega_{o}W_{e}\tikzmark{endb}}%
  + \dfrac{1}{\tikzmark{startc}Q_{unl}\tikzmark{endc}}+\dfrac{P_{sig}}{\tikzmark{startd}\omega_{o}W_{e}\tikzmark{endd}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{starte}\omega_{m}\tikzmark{ende}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay]
\foreach \Value/\Length/\Text in {%
  a/15pt/{Phase\\perturbation},%
  b/40pt/{Input power\\over\\reactive power},%
  c/20pt/{Resonator $Q$},%
  d/40pt/{Signal power\\over\\reactive power},%
  e/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\vspace{3cm}
\lipsum[1-3]


\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{startf}P_{s~av}\tikzmark{endf}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startg}\omega_{o}W_{e}\tikzmark{endg}}%
  + \dfrac{1}{\tikzmark{starth}Q_{unl}\tikzmark{endh}}+\dfrac{P_{sig}}{\tikzmark{starti}\omega_{o}W_{e}\tikzmark{endi}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{startj}\omega_{m}\tikzmark{endj}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay]
\foreach \Value/\Length/\Text in {%
  f/15pt/{Phase\\perturbation},%
  g/40pt/{Input power\\over\\reactive power},%
  h/20pt/{Resonator $Q$},%
  i/40pt/{Signal power\\over\\reactive power},%
  j/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\end{document}

在此处输入图片描述

答案2

如何让同一个方程在两个不同的页面上正确显示？

该类book默认为twoside排版。因此，在两个不同的页面中，边距不同，并且需要相应地更正标签。使用 xshift 值：

xshift=\dimexpr-\leftmargin-\oddsidemargin+\marginparsep

将在奇数页中对此进行补偿。

\documentclass{book}
\usepackage{amsmath,amsfonts,amssymb,amsthm}
\usepackage{mathptmx}
\usepackage{calc}
\usepackage{tikz}
\usetikzlibrary{tikzmark,calc,decorations.pathreplacing}
\usepackage{lipsum}

\begin{document}

\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{starta}P_{s~av}\tikzmark{enda}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startb}\omega_{o}W_{e}\tikzmark{endb}}%
  + \dfrac{1}{\tikzmark{startc}Q_{unl}\tikzmark{endc}}+\dfrac{P_{sig}}{\tikzmark{startd}\omega_{o}W_{e}\tikzmark{endd}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{starte}\omega_{m}\tikzmark{ende}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay,xshift=\dimexpr-\leftmargin-\oddsidemargin+\marginparsep]
\foreach \Value/\Length/\Text in {%
  a/15pt/{Phase\\perturbation},%
  b/40pt/{Input power\\over\\reactive power},%
  c/20pt/{Resonator $Q$},%
  d/40pt/{Signal power\\over\\reactive power},%
  e/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\vspace{3cm}
\lipsum[1-4]

\newpage
\begin{equation}
  L_{\omega_{m}}=\frac{1}{8}\dfrac{FkT}{\tikzmark{starta}P_{s~av}\tikzmark{enda}}\dfrac{\omega_{o}^{2}}{\omega_{m}^{2}}\left(\dfrac{P_{in}}{\tikzmark{startb}\omega_{o}W_{e}\tikzmark{endb}}%
  + \dfrac{1}{\tikzmark{startc}Q_{unl}\tikzmark{endc}}+\dfrac{P_{sig}}{\tikzmark{startd}\omega_{o}W_{e}\tikzmark{endd}} \right)^{2} \left(1 + \dfrac{\omega_{c}}{\tikzmark{starte}\omega_{m}\tikzmark{ende}} \right)
\end{equation}

\begin{tikzpicture}[remember picture,overlay]
\foreach \Value/\Length/\Text in {%
  a/15pt/{Phase\\perturbation},%
  b/40pt/{Input power\\over\\reactive power},%
  c/20pt/{Resonator $Q$},%
  d/40pt/{Signal power\\over\\reactive power},%
  e/20pt/{Flicker\\effect}%
  }
{
\draw[decorate,decoration={brace,mirror,raise=5pt}]
  ({pic cs:start\Value}) -- coordinate (aux-\Value) ({pic cs:end\Value}|-{pic cs:start\Value});
\draw
  ([yshift=-7pt]aux-\Value) -- ++(0pt,-\Length)
  node[below,align=center] {\Text};
}
\end{tikzpicture}

\end{document}

以下是来自两个连续页面的两张图片：

在此处输入图片描述

在此处输入图片描述

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