基于符号回归的材料模型的自动数据驱动发现:对人类大脑皮层的案例研究
Jixin Hou1, Xianyan Chen2, Taotao Wu3
1School of Environmental, Civil, Agricultural and Mechanical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA.
Acta biomaterialia
|September 19, 2024
概括
我们开发了一种数据驱动的方法,使用符号回归自动从有限的数据中发现准确和物理意义上的超弹性模型,确保对像人类大脑这样的软材料的关键约束的遵守.
科学领域:
- 计算力学 计算力学 计算力学
- 材料科学 材料科学 材料科学
- 生物物理学的生物物理.
背景情况:
- 超弹性构成模型对于描述软材料的机械行为至关重要.
- 传统方法往往需要大量的数据和复杂的表述,限制了可解释性.
- 从稀少的数据中自动发现具有物理意义的模型仍然是一个挑战.
研究的目的:
- 引入数据驱动的框架,自动识别可解释和具有物理意义的超弹性构成模型.
- 为了利用符号回归来生成遵守超弹性约束的节制数学表达式.
- 用合成和实验数据验证方法,包括人类大脑组织.
主要方法:
- 利用符号回归来探索基于不变数,基于主要延伸和基于正常应变的超弹性模型.
- 确保严格遵守超弹性约束,如多凸性和圆性.
- 用既有模型的合成数据和来自人类大脑皮层的实验数据验证了框架.
主要成果:
- 符号回归框架成功地发现了精确的超弹性模型,用简洁的数学表达式.
- 基于菌株的模型表现出卓越的准确性,而基于拉伸和基于菌株的模型捕获了大脑组织的非线性和不对称性.
- 模型表现出强大的插值能力和可接受的外推性能,多凸性/圆性评估证实了物理有效性.
结论:
- 符号回归提供了一个强大的工具,可以从稀疏的数据中自动发现同位素超弹性模型.
- 开发的框架准确地模拟了软物质,以其应用于人类大脑组织为例.
- 这种方法对于在各种软物质系统中发现构成模型具有广泛的适用性.
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