The results of studies of the antioxidant properties of multifunctional alkylphenolate type additives indicate the calcium salts of condensation products of alk
Invariant subspace method is exploited to obtain exact solutions of the twocomponent b-family system.It is shown that the two-component b-family system admits t
The paper establishes two stochastic SIRS models with jumps to describe the spread of network virus by cyber war,terrorism and others.First,adding random pertur