00328nas a2200097   4500000000100000008004100001100002600042700002200068700002000090245012000110       2024                            d1 aVyacheslav Kharchenko1 aYuriy Ponochovnyi1 aIevgen Babeshko00aMulti-fragmental and Multi-phase Availability Models of the Safety-critical I&C Systems with Two-cascade Redundancy