关注: 1) 表面的一些常见术语 Wallpaper group A wallpaper group (or plane symmetry group or plane crystallographic group ) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns ...
关注: 1) Extended Hückel method方法的实质; 2) Extended Hückel method在低维材料如纳米材料中的可能应用 The extended Hückel method is a semiempirical quantum chemistry method , developed by Roald Hoffmann since 1963 . It is based on ...
关注: 1) 电负性与得失电子的关系; 2) 如何有效地进行化学键分析 1. Dipole Physics A pair of electric charges or magnetic poles, of equal magnitude but of opposite sign or polarity, separated by a small distance. 【物理学】 偶极子:一对电荷或磁极,符号或极性相反 ...