The grassland vegetation in flood plain of the Fen River were classified into 12 communities by the groupaverage clustering method. The community characteristics of every community were described.
用组平均聚类法将汾河河漫滩草地植被分为12个群落，并对每个群落的群落学特征进行了分析。
2
Methods Without the priori knowledge, using the image grey-scale averagemethod (IAM) to implement multi-group experiments.
方法在无需先验知识的情况下，利用IAM方法进行多组实验。
3
Using unweighted pair groupmethod with arithmetic average (UPGMA), 9 populations of Emmenopterys henryi were clustered into two groups, inner-province group and outer-province group.