我的图形没有显示在编译后的文档中它们在代码中的位置。我尝试输入 \begin{figure}[h] 或 \begin{figure}[!h]，但图形仍然没有显示在我将它们放入代码中的位置。
这是我的代码：
In an effort to prevent this wastage, Dr. Mohammad Kassemi conducted a number of Zero Boil-Off Tank (ZBOT) experiments, which investigated temperature control strategies of a Freon known as perfluoro-n-pentane (PNP)\cite{kassemi2018zero}. ZBOT experimental hardware is shown below.
\begin{figure}
\centering
\includegraphics[width = \textwidth]{graphics/ZBOTHardware.png}
\caption{ZBOT experimental hardware: Test tank (left), full experiment assembly section view (middle), and screen LAD assembly(right)}
\label{fig:ZBOTHardware}
\end{figure}
The first series of these experiments was ground-based CFD-model validation of tank self-pressurization, and the second series tested a subcooled-jet pressure control strategy in microgravity on the International Space Station. Finally, the third series of experiments introduced a noncondensable gas into the ZBOT to study the effect of pressurant gases on pressure control strategies\cite{kassemiYTVid}.
In the second series of experiments, a subcooled jet was shot into the liquid volume of the tank, decreasing temperature stratification in the propellant and, thus, decreasing the presence of local hot spots where boiling can occur. Additionally, the ullage temperature decreased and the pressure in the tank decreased. An interesting finding during these experiments was that as the pressure in the tank decreased, bubbles formed above and below screens placed in the tank.
\begin{figure}
\centering
\includegraphics{graphics/bubbleOnScreen.png}
\caption{Still frame from ZBOT video data showing the bubbles on the screen and in the volume above (in the orientation) the screen. Large spherical bubbles are present because of the zero-g condition. Screen is not visible.}
\label{fig:bubblesOnScreen}
\end{figure}
These screens are meant to mimic liquid acquisition devices (LADs), which assist with the separation of the liquid and vapor phases of propellant, and ensure that only liquid propellant is drawn into a rocket engine or into propellant storage tanks\cite{hartwig2014influential}.
输出如下：
正如您所看到的，图像显示在代码中的位置之后的不同的页面上。表格也出现了同样的问题。