中文摘要：

系统地研究了影响镧系元素物理化学性质的各种因素，以镧系元素的鲍林电负性（Xp）、Miedema的价电子云密度（nms^1/3）、f^n组态电子间排斥能（Hr）、离子半径（r）、范德华半径（rm）、失屏参数（Rξ）、键参数拓扑指数（HE）以及Xp^2、Rξ^1/2、nms^1/3Rξ^1/2等为参数（变量），使用最佳子变量集算法，对18种镧系元素物理化学性质进行了关联．得到的结果是满意的．最佳子变量集算法可用于变量筛选，适用于复杂的定量构效关系研究．

英文摘要：

Systematical studies were made on the influencing factors concerned to physico - chemical properties of lanthanide. A set of parameters such as elecrtonegativity（Xp）, density of valent electronic cloud（nms^1/3）, repelling energy of f^n electronic conflguration（Hr）, ionic radii（r）, van der waals radii（rw）, parameters of losingshielding effect（Rξ）, bending parameter topological index（HE）, and Xp2,Rξ^1/2,nms^1/3. Rξ^1/2, applied in this work, were correlated with 20 physico - chemical properties of lanthanides with the algorithm of leaps and bounds. The ob- tained results are satisfactory, and better than that obtained by using ordinaty statistic method in other hterature. The algorithm of ＂Leaps and Bounds＂ good was performed for selection of the variables, it is suitable for studies on comphcated quantitative structure-property relationship.