自然地理界线判别的投影寻踪技术

The Research of the Projection Pursuit Method for the Physical Geography Boundary

改进投影寻踪技术是一种基于改进单纯形法直接优化投影寻踪技术的投影函数和投影方向的一种新方法,提出应用改进投影寻踪技术建立自然地理界限划分的判别模型,利用该模型可把自然地理上各气象站点的多维分类指标综合成一维投影值,根据投影值的大小可对气象站点样本集进行合理判别,从而科学确定自然地理的气候带。以福建省南亚、中亚热带自然地理划分为例,探讨了应用改进投影寻踪技术在自然地理划分中的具体应用,福建中、南亚热带自然地理划分结果表明,直接由样本数据驱动的改进的投影寻踪自然地理界线判别模型用于中、南亚热带自然地理的划分简单可行,具有较强的适用性和应用性,可操作性强,可广泛应用于各气候带及地域界线的划分。

The modified projection pursuit method is a new method which based on the modified simplex method of optimization the projection function and direction of projection pursuit technique directly, use the modified projection pursuit method to set up the classification model of physical geography boundary, utilizing this model to integrate the multidimensional classification index of every meteorological website on physical geography into one-dimensional projection value, according to projects the value size to be possible to carry on the reasonable classification to the meteorological stand sample collection, thus determine the climatic zone of physical geography scientifically. Take the south subtropics and the middle subtropics of Fujian Province＇ s physical geography division as the example, discussed the concrete application of modified projection pursuit method using in physical geography division. Physical geography division result indicated, the classification model of the modified projection pursuit method driven by the sample data directly can used in physical geography division simple and feasibly, have stronger feasibility and applicability, the effectiveness is strong, can apply to the division of every climatic zone and division of region boundary line extensively.