此文件包含了GEORGIOS SMARAGDAKIS　　IBRAHIM MATTA　　AZER BESTAVROS等人的论文“A Stable Election Protocol for clustered heterogeneous wireless sensor networks ”　以及实现代码。(This document contains the paper "A Stable Election Protocol for Clustered Heterogeneous Wireless Sensor Networks"　by GEORGIOS SMARAGDAKIS IBRAHIM MATTA AZER BESTAVROS et al and the implementation code)