In order to improve efficiency of developing customized artificial joint, a virtual enterprise is organized based on the manufacturing grid. The application-ori
Some new sufficient conditions for the oscillation of the neutral equation d/dt[y(t)-R(t)y(t-r)] P(t)y(t-τ)-Q(t)y(t-σ)=0,whereP, Q, R∈ C([t0, ∞), R+) and r,