“…Three subsets are: • Adjacency matrix group: the adjacency matrix A removes the centripetal group and the centrifugal group. • Centripetal group: the neighboring nodes far from the gravity center (node 11), such as (8, 7), (11,8), (8,9), (11,12), (12,13), (12,15). • Centrifugal group: the neighboring nodes close to the gravity center (node 11), Such as (7, 8), (8,11), (9, 8), (12,11), (13,12), (15,12).…”