群体的密度分布和深度
Density distributions and depth in flocks
摘要：
最近的实验证据表明，鸟群中的相互作用并不涉及特征长度尺度。鸟群的密度分布也不均匀，靠近边界的鸟的密度大于靠近中心的鸟的密度。我们引入了一个严格的度量自由模型的集体行为，包括一个分布式的运动偏差，提供控制的密度分布。这个模型的一个简单的版本，然后能够提供一个很好的适合发表的数据的密度变化在成群的椋鸟。我们发现，在鸟群边缘的个体有必要具有向内的运动偏向，但在鸟群内部的鸟则必须具有向外的偏向。我们讨论了个人的能力，以确定他们的深度内的羊群，并显示这可能是通过相对简单的分析，他们的视觉环境。
英文摘要：
Recent experimental evidence suggests that interactions in flocks of birds do not involve a characteristic length scale. Bird flocks have also been revealed to have an inhomogeneous density distribution, with the density of birds near the border greater than near the centre. We introduce a strictly metric-free model for collective behaviour that incorporates a distributed motional bias, providing control of the density distribution. A simple version of this model is then able to provide a good fit to published data for the density variation across flocks of Starlings. We find that it is necessary for individuals on the edge of the flock to have an inward motional bias but that birds in the interior of the flock instead must have an outward bias. We discuss the ability of individuals to determine their depth within a flock and show how this might be achieved by relatively simple analysis of their visual environment.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
