\documentclass{IEEEtran}
\usepackage{cite}
\usepackage{subfig}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{algorithmic}
\usepackage{graphicx}
\usepackage{textcomp}
\usepackage[colorlinks]{hyperref}
\def\BibTeX{{\rm B\kern-.05em{\sc i\kern-.025em b}\kern-.08em
		T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}
\begin{document}
The shape of three different size raindrops, created by the above equations, is shown in Fig. \ref{raindrops}. Here, it is noteworthy that the largest drops radius will not exceed 4 mm, since they become hydro-dynamically unstable. The MPP model therefore, is applied for $ r_0 < 4 mm$ .
\begin{figure}[t]
	\centering
	\subfloat[$r_{0}$ = 1 mm.]{\includegraphics[scale=0.5]{raindrop1.jpg}}
	\qquad
	\subfloat[$r_{0}$ = 2 mm.]{\includegraphics[scale=0.6]{raindrop2.jpg}}
	\qquad
	\subfloat[$r_{0}$ = 4 mm.]{\includegraphics[scale=0.7]{raindrop3.jpg}}
	\caption{shapes of raindrops.}
	\label{raindrops}
\end{figure}
\end{document}