1) refining accuracy
逐级精化
3) fractional acidification
逐级酸化法
1.
Preparation of high purity dehydroabietic acid by fractional acidification;
逐级酸化法制备高纯度脱氢枞酸
4) sequential chemical extraction
逐级化学提取
1.
The partitioning of several metal elements in lignites from Xilinguole League was investigated using five-step sequential chemical extraction procedures.
应用 5步逐级化学提取研究了褐煤中多种金属元素的存在形态 ,并用电感耦合等离子体原子发射光谱 (ICP OES )法测定了整个提取过程中金属元素的浓度 ,结果表明 ,应用 5步逐级化学提取法可以有效地定量研究褐煤中金属元素的形态分布 。
2.
Experimental results demonstrate that sequential chemical extraction procedure is efficient in determining the speciation of trace elements in coal quantitatively.
应用逐级化学提取法对3种典型煤进行浸提,根据易挥发痕量元素不同形态的溶解度,将煤中砷、汞、硒分为可交换态、硫化物结合态、有机物结合态和残渣态。
5) sequential chemical extract
逐级化学提取
1.
The occurrence of hazardous elements such as Hg,Ni,Zn,Mn,Cr,and V in Heshan high organosulfur coal formed in sedimentary environment of restricted carbonate platform was studied using sequential chemical extract.
采用逐级化学提取方法,研究了广西合山超高有机硫煤中Hg,Ni,Zn,Mn,Cr,V等有害元素赋存状态。
2.
The occurrence of trace arsenic in two bituminous coals and three anthracite coals was investigated using five step sequential chemical extract method.
应用５步法逐级化学提取研究了２个烟煤和３个无烟煤样品中微量Ａｓ（０。
3.
The sequential chemical extraction method is put forward to determine the occurrence modes of chlorine in coal.
评述了煤中氯的研究现状，用仪器中子活化分析方法测定了中国４５个晚古生代全层煤样氯的质量分数，提出了煤中氯的逐级化学提取方法。
6) hierarchical optimization and solution by means of layer by layer
分级与逐层优化
补充资料：公理化方法(见公理化和形式化)
公理化方法(见公理化和形式化)
axiomatical method
gongllbuafangfa公理化方法化和形式化。(axiomatieal method)见公理
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条