In this paper,a necessary condition that a cut vertex belongs to every γ s set of G is discussed,and a necessary and sufficient condition of existing indepedent set dominating set in G is given.

Whereas the cut vertex or the small vertex cutset extraordinarily threaten the connectivity of overlay networks,for the removal of them will separate the network into many components.

Let G is connected simple graph,v is a cut vertex of G,and G1 ,G2,… ,Gp(p≥ 2)are the v-components of G.

Optimal TBP cut points in supply chain management of refinery enterprises;

Measures of lower plant severity, operation conditions optimization, diesel cut point change, selection of proper catalysts on RFCCU plant were taken during technical revamp of Heilongjiang Petrochemical Factory.

Bayes estimation is introduced to improve the reliability of entropy and RCP(random cut point)is proposed to strengthen the ability of generalization about unknown test samples, and then a new classifier based on EP inspired by KNN is made.