一、基本概念 吸引力 F a ( n i ) = ∑ n j ∈ N c t d ( n i ) ω i , j d E ( n i , n j ) V i , j \displaystyle \bm{F}_a(n_i)= \sum_{n_j \in \mathcal{N}_{ctd}(n_i)} \omega_{i,j} \; d_E(n_i,n_j) \bm{V}_{i,j} Fa​(ni