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arXiv 2002.02528cs.LGcs.NAmath.DSmath.NAstat.ML
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基于广义剩余网络的未知动力系统深度学习

On generalized residue network for deep learning of unknown dynamical systems

The Ohio State University(俄亥俄州立大学)

Zhen Chen, Dongbin Xiu

摘要:

我们提出了一种使用深度神经网络(DNN)学习未知动力系统的通用数值方法。我们的方法建立在最近的研究基础上,这些研究将残差网络(ResNet)确定为有效的神经网络结构。在本文中,我们提出了一个广义的ResNet框架,并广义地将残差定义为观测数据与另一个模型(可以是现有的粗模型或降阶模型降阶模型)预测之间的差异。在这种情况下,广义ResNet作为对现有模型的模型校正,并恢复未解决的动态。当现有的粗模型不可用时,我们提出了快速创建粗模型的数值策略,与广义ResNet结合使用。这些粗略模型使用相同的数据集构建,因此不需要额外的资源。广义ResNet能够学习潜在的未知方程,并产生比标准ResNet结构更高精度的预测。这是通过几个数值例子,包括混沌系统的长期预测证明。

英文摘要:

We present a general numerical approach for learning unknown dynamical systems using deep neural networks (DNNs). Our method is built upon recent studies that identified the residue network (ResNet) as an effective neural network structure. In this paper, we present a generalized ResNet framework and broadly define residue as the discrepancy between observation data and prediction made by another model, which can be an existing coarse model or reduced-order model. In this case, the generalized ResNet serves as a model correction to the existing model and recovers the unresolved dynamics. When an existing coarse model is not available, we present numerical strategies for fast creation of coarse models, to be used in conjunction with the generalized ResNet. These coarse models are constructed using the same data set and thus do not require additional resources. The generalized ResNet is capable of learning the underlying unknown equations and producing predictions with accuracy higher than the standard ResNet structure. This is demonstrated via several numerical examples, including long-term prediction of a chaotic system.

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。

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