Equation Icon  u ∗H (k )u = u∗(S(k)− 1)∗S (k)−1u | ( ) |2 ¯ 2 α- ¯ 2 || ¯ β- ¯|| ¯i ¯ = 2|E | + 2β |U | + |βW − 1 + 2 U | + 2E Ei [ i i][ ] i ij + 2 V¯ − (1 + α )W ¯ ¯Vi − (1 + α ) ¯Wi + W¯ W¯i + ¯W ¯Wij,