The sensor nodes of a wireless grain depot surveillance system are deployed in crystal grids, which provide lot of valid position information. To avoid the energy consumption unbalance of the single hop routing model adopted by LEACH prot

最大类间方差的基本思想是使用一个阈值将整个数据分成两个类，假如两个类之间的方差最大，那么这个阈值就是最佳的阈值-The between-cluster variance as the basic idea is to use a threshold to the whole data is divided into two classes, if the maximum variance between two classes, then the threshold value is the b