The main component analysis has been used to study the principal factors which affect soil background contents of a number of metals in Beijing area.
用主成份分析研究了影响北京地区土壤元素背景值的主要因素。
The main component analysis has been used to study the principal factors which affect soil background contents of a number of metals in Beijing area.
用主成份分析研究了影响北京地区土壤元素背景值的主要因素。
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