土壤金属污染源的定位研究 |
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引用本文: | 李玉梅,向阳,张娟,杨志明,唐文璐.土壤金属污染源的定位研究[J].怀化学院学报,2011,30(11):25-27. |
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作者姓名: | 李玉梅 向阳 张娟 杨志明 唐文璐 |
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作者单位: | 怀化学院数学系,湖南怀化,410008 |
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基金项目: | 湖南省教育厅青年项目,怀化学院“应用概率统计”创新性试验点 |
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摘 要: | 对某城市工业区土壤汞(Hg)、镉(Cd)、铅(Pb)、砷(As)、铜(Cu)、铬(Cr)、镍(Ni)、锌(Zn)八种重金属元素含量的数据进行统计分析,研究了它们的分布特征.定义了一个随机变量X表示采样点状态,它描述了各金属浓度在该采样点所占比例,具有分布P(X=i)=xiμg/1g=Pi.给出了自然区的熵H=-∑Pil...
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关 键 词: | 熵 土壤重金属 污染源 |
The Research of Mapping the Soil Pollution Source |
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Abstract: | This paper analysis statistics characteristic for the content of eight soil heavy metal Hg, Cd, Pb, As, Cu, Cr, Ni, and Zn at the industrial zone of a city. Define a variable X as the state of sampling location, with the probability distribution P( X = i) = xiμg/1g = Pi , which describes the ratio for each metal concentration at sampling location. Give the entropy H = - PilogPi (unconditional entropy) at the nature zone and the entropy Hc^(j)=-∑Pi^(j)logPi^(j) (conditional entropy) for each sampling location. Propose an index l = H - Hc , which measures the close degree between the sampling location and the pollution source. Map the pollution source of the industrial zone with the index l . |
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Keywords: | entropy soil heavy metal pollution source |
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