By using the method of cluster analysis, the annual variation curve types of the sunshine percentage in China are divided into 12 divisions.
本文根据日照百分率年变程曲线类型，应用聚类分析方法，把全国划分为12个日照区。
By using the method of cluster analysis, the annual variation curve types of the sunshine percentage in China are divided into 12 divisions.
本文根据日照百分率年变程曲线类型，应用聚类分析方法，把全国划分为12个日照区。
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