The grassland vegetation in flood plain of the Fen River were classified into 12 communities by the group average 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。
Methods Without the priori knowledge, using the image grey-scale average method (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。
Using unweighted pair group method with arithmetic average (UPGMA), 9 populations of Emmenopterys henryi were clustered into two groups, inner-province group and outer-province group.
利用算术加权平均数法（UPGMA）对香果树居群进行聚类，结果9个居群可分成浙江省内和省外两大类群。
The essence of this method is a group of differential equations based on the average change rate of orbit elements, and the right sides of these equations contain definite integrals.
它的实质是以轨道要素的平均变化率为基础的微分方程，而方程的右端包含定积分。
The essence of this method is a group of differential equations based on the average change rate of orbit elements, and the right sides of these equations contain definite integrals.
它的实质是以轨道要素的平均变化率为基础的微分方程，而方程的右端包含定积分。
应用推荐