There often exist behaviors of moving against the main direction of evacuation in order to rescue or find the important missing people in real situations. However, the traditional social force model (SFM) often lacks consideration of such “counter flow”. Motivated by this, we improve the traditional SFM to study the counter flow and its influence on evacuation out of multi-exit rooms. We call the person to be rescued “superior” and the rescuers “subordinate”. Two different rescue situations are proposed: superior waiting in place (case 1) and superior moving towards the exit (case 2). The results show that the counter flow will always reduce the evacuation efficiency to a certain extent, and the evacuation efficiency of case 1 is lower than that of case 2. At the same time, for these two cases, increasing the number of rescuers increases the evacuation time. We also find that the existence of counter flow can enlarge the effect of “faster-is-slower”, while increasing the number of exports can significantly improve the rescue efficiency. We hope that this result can help to improve the efficiency of emergency evacuation with rescue.

中文翻译：

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改进的疏散救援行动社会力量模型

现实中经常存在为了营救或寻找重要失踪人员而逆向疏散主方向移动的行为。然而，传统的社会力量模型（SFM）往往缺乏对这种“逆流”的考虑。受此启发，我们改进了传统的 SFM 来研究逆流及其对多出口房间疏散的影响。我们称被救人为“上级”，称救援人员为“下级”。提出了两种不同的救援情况：上级就地等待（案例1）和上级向出口移动（案例2）。结果表明，逆流总是会在一定程度上降低排空效率，情况1的排空效率低于情况2。同时，对于这两种情况，增加救援人员的数量会增加疏散时间。我们还发现逆流的存在可以放大“越快越慢”的效果，而增加出口数量可以显着提高救援效率。我们希望这个结果可以帮助提高紧急疏散救援的效率。