Then it is compared with water quality as-sessment methods of single factor assessment and principal components analysis(PCA).
针对实际水质评价问题,建立了渭河地面水环境质量综合评价的BP神经网络模型,并与单因子法、主成分分析法进行了分析比较。
Using single factor index method,surface soils had been polluted by slight heavy metal pollutions,and 6% soils were moderate Hg pollution.
以Al元素作为标准化元素求得平湖地区农田土壤重金属基线值,用单因子指数法进行土壤质量评价,结果表明该地区表层土壤均受到不同程度的轻微重金属污染,6%土壤为中度Hg污染;内梅罗综合污染指数显示土壤作物已经受到了污染,但程度不严重。
In this paper,the single-calibration-ratio iteration calculating method is proposed to improve quantitative analysis method for determination of water in water-reducible paint by Gas Chromatography(GC)and some procedures in experiment are modified.
本文提出单点校正因子迭代法,改进了气相色谱测定涂料中水的定量分析方法,并对部分实验操作步骤进行了改进。