1、This paper analyzes the quasi static current field boundary value problem in inhomogeneous media with a borehole.
2、Moreover, we prove that if the disturbance decoupling problem is solvable by a dynamic state feedback, then it is solvable by a quasi static feedback.
3、A quasi static approach is presented for ductile tearing test of double cantilever beam specimen by using the model of elastic beam on elaso plastic foundation.
4、The case researches by using the quasi static equilibrium model described in this paper where the inertia term was corrected also agreed with the conclusion mentioned above.
