以基团电负性原理为基础，通过数学推导导出了一种比较浮选捕收剂选择性的方法。
Based on the principle of group electronegativity, through mathematical deduction, the author deduced the method for the comparison of the selectivity of floatation collectors.
建立了用基团电负性计算含氮含硫有机物键裂能的简单方法，并且得到自由基标准生成热的计算方法。
A simple method for calculating the standard formation heats of organic compounds containing nitrogen or sulfur by using of the group electronegativity is built up in this paper.
本文借助最大重叠杂化轨道理论，研究了卤代甲烷系列分子的红外伸缩频率，基团电负性和质子酸度等分子性质与结构的关系。
The maximum overlap method was used to study the relationships the C-H stretching frequencies, group electronegativities and proton acidity properties and the molecular structure in the halomethanes.
因此，可以从硼酸盐晶体的阴离子基团电负性出发估算其最大二次非线性光学系数，这就为寻找新型的二次非线性光学硼酸盐晶体提供了理论依据。
So, we can estimate the maximal second NLO coefficients of borate crystals from their EN of anion groups, which can be used to search new second NLO borate crystals.
因此，可以从硼酸盐晶体的阴离子基团电负性出发估算其最大二次非线性光学系数，这就为寻找新型的二次非线性光学硼酸盐晶体提供了理论依据。
So, we can estimate the maximal second NLO coefficients of borate crystals from their EN of anion groups, which can be used to search new second NLO borate crystals.
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