Based on Q-type cluster analysis of 18 water samples of karst-water system in Pingtou hydropower station, the paper draws hierarchical cluster graph.

该文以坪头水电站为例，对厂址区的18个水样进行Q型聚类分析，绘制出聚类分析谱系图。

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Methods Neuropsychological tests were carried out in 34 subjects by using clinical memory scales including 17 variables and Q type cluster analysis was performed.

方法对34例调查者进行临床记忆量表等17种神经心理测验，将结果进行Q型聚类分析。

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Methods The data of resident's contacting infectious water were collected with cohort study, and were analyzed by sample cluster analysis (Q type).

方法采用队列随访调查的方法收集居民疫水暴露的情况，并用系统聚类法中样品聚类(Q型)进行聚类分析。

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