如何将图形与小节对齐？

Question

我在小节下方放置了许多图表，但小节标题和实际图表之间有一页的差距。

有人知道如何解决这个放置问题吗？

该问题的 MWE 概述如下，这些是正在使用的图像http://picpaste.com/GesturePhysio_ProcessThreadSummary-J3gCQ99g.png，http://picpaste.com/gui_test_1-h3zNWpHU.png ，http://picpaste.com/gui_test_2-vZVQP6KV.png：

%%%%%%%%%%%%%%%%%%%%%%% file typeinst.tex %%%%%%%%%%%%%%%%%%%%%%%%%
%
% This is the LaTeX source for the instructions to authors using
% the LaTeX document class 'llncs.cls' for contributions to
% the Lecture Notes in Computer Sciences series.
% http://www.springer.com/lncs       Springer Heidelberg 2006/05/04
%
% It may be used as a template for your own input - copy it
% to a new file with a new name and use it as the basis
% for your article.
%
% NB: the document class 'llncs' has its own and detailed documentation, see
% ftp://ftp.springer.de/data/pubftp/pub/tex/latex/llncs/latex2e/llncsdoc.pdf
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


\documentclass[runningheads,a4paper]{llncs}


\usepackage{url}
\usepackage{paralist}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage{placeins}
\usepackage[numbers]{natbib}
\usepackage{listings}
\usepackage{color}

\definecolor{dkgreen}{rgb}{0,0.6,0}
\definecolor{gray}{rgb}{0.5,0.5,0.5}
\definecolor{mauve}{rgb}{0.58,0,0.82}

\lstset{frame=tb,
  language=C,
  aboveskip=3mm,
  belowskip=3mm,
  showstringspaces=false,
  columns=flexible,
  basicstyle={\small\ttfamily},
  numbers=none,
  numberstyle=\tiny\color{gray},
  keywordstyle=\color{blue},
  commentstyle=\color{dkgreen},
  stringstyle=\color{mauve},
  breaklines=true,
  breakatwhitespace=true,
  tabsize=3
}
\graphicspath{ {images/} }



\setcounter{tocdepth}{3}

\begin{document}

\mainmatter  % start of an individual contribution

\title{Final Year Minor Dissertation}







\maketitle









\section{Appendices}
\label{sec:Appendecies}

\renewcommand{\thesubsection}{\Alph{subsection}}


\subsection{Performance and Profiling}

\FloatBarrier

\begin{figure}[H]
\caption{Sample of Process profiling  \cite{Visua8:online}}
\centering
\includegraphics[width=1\textwidth]{GesturePhysio_ProcessThreadSummary}
\end{figure}

\FloatBarrier



\subsection{GUI Tests}



\begin{figure}[H]
\caption{GUI Test - ROM View \cite{Visua8:online}}
\centering
\includegraphics[width=1\textwidth]{gui_test_1}
\end{figure}


\begin{figure}[H]
\caption{GUI Test - Login View \cite{Visua8:online}}
\centering
\includegraphics[width=1\textwidth]{gui_test_2}
\end{figure}

\FloatBarrier


\end{document}

这是图形的位置，小节标题和实际图形之间有一页的间隙。我需要将图形放在靠近小节标题的位置：