The concentrations of lead and cadmium in the tree bark from Sanming and Xiamen, Fujian province, China were determined by atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry. The results...The concentrations of lead and cadmium in the tree bark from Sanming and Xiamen, Fujian province, China were determined by atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry. The results obtained in the outer tree bark and tree bark pocket could reflect the degree of present and historical air pollution at different sampling locations. Tree bark and tree bark pocket should be expected to be as a useful biomonitor of present and historical condition of air pollution.展开更多
选取新疆中天山沙垄以西地区开展铅锌矿成矿预测研究,将决策树技术引入到成矿预测中。通过区域成矿规律分析,选取不同构造单元中数据较为完整、具有代表性的典型矿床,建立综合信息预测模型,采用决策树技术中的ID3算法构建决策树,在ERDAS...选取新疆中天山沙垄以西地区开展铅锌矿成矿预测研究,将决策树技术引入到成矿预测中。通过区域成矿规律分析,选取不同构造单元中数据较为完整、具有代表性的典型矿床,建立综合信息预测模型,采用决策树技术中的ID3算法构建决策树,在ERDAS IMAG ING 8.7平台上建立分类决策树,开展铅锌远景区预测。经野外验证,预测区与已知矿化区吻合度较高,证实该方法在成矿预测中是可行的。展开更多
文摘The concentrations of lead and cadmium in the tree bark from Sanming and Xiamen, Fujian province, China were determined by atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry. The results obtained in the outer tree bark and tree bark pocket could reflect the degree of present and historical air pollution at different sampling locations. Tree bark and tree bark pocket should be expected to be as a useful biomonitor of present and historical condition of air pollution.
文摘选取新疆中天山沙垄以西地区开展铅锌矿成矿预测研究,将决策树技术引入到成矿预测中。通过区域成矿规律分析,选取不同构造单元中数据较为完整、具有代表性的典型矿床,建立综合信息预测模型,采用决策树技术中的ID3算法构建决策树,在ERDAS IMAG ING 8.7平台上建立分类决策树,开展铅锌远景区预测。经野外验证,预测区与已知矿化区吻合度较高,证实该方法在成矿预测中是可行的。
