  We present the first attempt of systematically investigating the effects of
shell correction energy for a dynamical process, which includes fusion,
fusion-fission and quasi-fission processes. In the superheavy mass region, for
the fusion process, shell correction energy plays a very important role and
enhances the fusion probability when the colliding partner has a strong shell
structure. By analyzing the trajectory in three-dimensional coordinate space
with the Langevin equation, we reveal the mechanism of the enhancement of the
fusion probability caused by `cold fusion valleys'. The temperature dependence
of shell correction energy is considered.
