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以中性原子核外电子最高占据轨道能EHOAO和最低未充满轨道能ELUAO及价壳层轨道电子平均结合能EOEAC为基本参数,发现元素的硬度可进行多元线性回归并得到回归方程来定时描述,与Pearson硬度实验值呈优良的相关性,相关系数0.9685,标准差0.3756eV,平均绝对偏差0.2879eV,计算结果优于文献报道方法,并对1～100号元素硬度的实验空缺值进行了预报.表1,参18.
The basic parameters of EHOAO, ELUAO, and EOEAC of valence shell orbitals are found as the highest occupancy of EHOAO and EOEAC. The results show that the hardness of elements can be multivariate linear regression and can be described by regression equation, and Pearson hardness test showed excellent correlation with a correlation coefficient of 0.9685, a standard deviation of 0.3756eV, and an average absolute deviation of 0.2879eV, which is superior to the reported methods in the literature and predicted the experimental vacancies of elemental hardness of 1-100. 1, 参 参 18.