sample variation

The average, the standard deviation and the coefficient of variation of the sample attributes of the NWD are the reflections of the basic quantitative characteristics of the nested habitats.

由近湿地类型区样点属性计算平均值、标准差和变异系数，获得了朱鹮营巢生境的数量特征；

Can be drawn from the survey sample data, Zhuzhou City road green landscape of plants used in variety of bright colors, layering, and showed a seasonal variation.

由调查样地的数据可得出，株洲市道路绿地景观植物应用种类丰富，色彩鲜明，层次感较强，并呈季相变化。

An express describing the entry pressure variation for the sample flow in conical dies was presented by using the constitutive equation of the second-order fluid and a tensor analysis method.

采用二阶流体本构关系和张量分析方法，导出了预测聚合物熔体在锥形口型流动中压力变化的方程式。

A specific problem, particularly if the sample is heterogeneous, is how to depict information about structural variation.

一个特定的问题是如何描述结构变化的信息，特别是如果样本是异质性时。