标题： 社会力模型中的疏散不是稳态的 显示英文标题

标题： Evacuation in the Social Force Model is not stationary

摘要： 在社会力模型中模拟了一个疏散过程。 数千名行人通过一个出口离开房间。 我们研究了两个连续行人通过出口的时刻之间的时间滞后分布的平稳性。 该分布的指数尾部被证明逐渐消失。 除去波动因素，时间滞后随时间减少，直到房间内只剩下约50名行人，然后开始增加。 这表明在最后阶段，流动是层流的。 在第一阶段，拥堵事件减缓了疏散速度。 由于它们更可能出现在较大的人群中，流动不是平稳的。 数据通过去趋势波动分析进行了研究。 显示英文摘要

摘要： An evacuation process is simulated within the Social Force Model. Thousand pedestrians are leaving a room by one exit. We investigate the stationarity of the distribution of time lags between instants when two successive pedestrians cross the exit. The exponential tail of the distribution is shown to gradually vanish. Taking fluctuations apart, the time lags decrease in time till there are only about 50 pedestrians in the room, then they start to increase. This suggests that at the last stage the flow is laminar. In the first stage, clogging events slow the evacuation down. As they are more likely for larger crowds, the flow is not stationary. The data are investigated with detrended fluctuation analysis.