单边调节打破了图灵模式的规律性
Unilateral regulation breaks regularity of Turing patterns
摘要：
我们考虑一个反应扩散系统经历图灵不稳定性，并增加了一个额外的单边源项。我们研究了它对图灵不稳定性的影响以及对所得到的图形的性质的影响。非光滑正齐次单边项$τv^-$具有良好的性质，但不能进行标准的线性稳定性分析。我们说明了非光滑的重要性的数值算例研究，这表明，图灵不稳定性可以大大改变，如果我们用任意精确的光滑近似取代这项。然而，非光滑单边项及其所有近似产生定性相似的模式，虽然不一定是从空间均匀稳态的小扰动发展。此外，我们表明，单边源打破了近似的对称性和规则性的经典模式，并产生不对称和不规则的模式。此外，一个给定的系统与单边源产生的空间模式，甚至比相同的系统，没有任何单边项的比率接近1的扩散参数。
英文摘要：
We consider a reaction-diffusion system undergoing Turing instability and augment it by an additional unilateral source term. We investigate its influence on the Turing instability and on the character of resulting patterns. The nonsmooth positively homogeneous unilateral term $τv^-$ has favourable properties, but the standard linear stability analysis cannot be performed. We illustrate the importance of the nonsmoothness by a numerical case study, which shows that the Turing instability can considerably change if we replace this term by its arbitrarily precise smooth approximation. However, the nonsmooth unilateral term and all its approximations yield qualitatively similar patterns although not necessarily developing from small disturbances of the spatially homogeneous steady state. Further, we show that the unilateral source breaks the approximate symmetry and regularity of the classical patterns and yields asymmetric and irregular patterns. Moreover, a given system with a unilateral source produces spatial patterns even for diffusion parameters with ratios closer to 1 than the same system without any unilateral term.
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。
