  In this paper, as a common generalization of $SI_{2}$-continuous spaces and
$s_{2}$-quasicontinuous posets, we introduce the concepts of
$SI_{2}$-quasicontinuous spaces and $\mathcal{GD}$-convergence of nets for
arbitrary topological spaces by the cuts. Some characterizations of
$SI_{2}$-quasicontinuity of spaces are given. The main results are: (1) a space
is $SI_{2}$-quasicontinuous if and only if its weakly irreducible topology is
hypercontinuous under inclusion order; (2) A $T_{0}$ space $X$ is
$SI_{2}$-quasicontinuous if and only if the $\mathcal{GD}$-convergence in $X$
is topological.
