1. Introduction
As one of unconventional emergencies, fire with its harmfulness, regularity and coping style is concerned by many
scientists. Moreover, research on human evacuation in fires is a complicated, interdisciplinary and very significant problem.
When fires occur, in order to guarantee safety of evacuees, RSET (required safe egress time) should be less than ASET
(available safe egress time). In addition, the start time of evacuation TS is an important part of RSET. Here, we know that
during fires, evacuation start time TS is determined by many kinds of factors. For this reason, the numerical value of TS is
uncertain. However, it can be found that TS has a close relationship with human reactions including psychological process