地球化学图相似性定量评价方法

Quantitative Assessment Method for the Similarity of Geochemical Maps

比较不同实验室分析数据制作的虚拟地球化学图的相似性,是近几年提出的化探分析质量监控与评价的新方法,但"目视比较法"只能得到模糊定性的结论。文章引入FFP评价原理,根据图形重叠性计算图形相似指数,据此定量评价地球化学图的相似性,使地球化学图相似性研究从定性分析上升为定量判断水平。该评价方法可进一步推广应用于元素分布、环境污染时空变化研究。

Comparing the similarity of virtual geochemical maps made from the data of different labs is a new method for geochemical analytical quality control and evaluation. But the comparison by eyesight could get only qualitative and fuzzy conclusions. By calculating the overlap areas of the maps and introducing the FFP evaluation principle, the similarity indexes of the maps would be obtained. Based on the similarity indexes, the similarity of the maps could be evaluated quantitatively. This method can be also applied to the research on element distribution and temporal and spatial variation of environmental pollution regions.