说明：  针对无线传感器网络在节点均匀分布的情况下节点定位精度较差的问题，提出了三边质心定位算法．该算法利用节点均匀分布的先验信息将质心定位思想引入到三边测量法中
(For wireless sensor network nodes uniformly distributed in the case of poor positioning accuracy node problem, a trilateral centroid localization algorithm. The algorithm uses a priori information uniformly distributed nodes centroid localization will introduce the idea of trilateration)