控制运动,认知,活性粒子群体中的粒子间距离
Rajendra Singh Negi1, Priyanka Iyer1, Gerhard Gompper2
1Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute of Advanced Simulation, Forschungszentrum Jülich, 52425, Jülich, Germany.
Scientific reports
|April 24, 2024
概括
半密集人群中的活性剂根据视觉和活动调整了运动. 增加速度导致更近距离和更短的曝光时间,在特定的视角观察到集群.
科学领域:
- 复杂的系统复杂的系统.
- 统计物理 统计物理
- 基于代理的建模模型
背景情况:
- 在多粒子系统中,控制距离至关重要,特别是对于能感知并对环境做出反应的活性剂.
- 了解在半密集人群中的代理相互作用,视野范围超过粒子大小,是预测集体行为的关键.
研究的目的:
- 调查代理活动 (Péclet数,机动性,视角/范围) 和密度如何影响多粒子系统中的距离和动态.
- 分析最小距离,曝光时间和定向持久性,以描述代理行为的特征.
主要方法:
- 基于代理的模拟被用于模拟粒子相互作用.
- 系统参数包括Péclet数,重定向机动性,视角,视距和剂量密度.
- 分析的重点是最小的邻居距离,暴露时间和定向持久性.
主要成果:
- 在固定机动性下增加粒子速度,导致粒子距离更近,曝光时间更短.
- 较高的活动 (Péclet数) 减少了运动的时间持久性,影响了方向变化.
- 特定的视角诱导了带状结构的聚合物,类似于Vicsek模型.
- 对于具有特定缩放变量的某些量,观察到普遍的缩放行为.
结论:
- 代理活动和感官参数显著地决定了半密集人群中的集体动态和空间组织.
- 模拟结果与在封闭环境中对行人行为的实验观测一致.
- 这项研究揭示了主动物质系统中自我组织和新兴行为的基本原则.
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