用神经算子与进化算法结合,高效设计复杂物理系统。
Neural Operator-enabled Topology-informed Evolutionary Strategy for PDE-Constrained Optimization

- 用DeepONet降维并学习拓扑先验,在低维隐空间优化
- 纳米光子器件设计效率超95%,结构优化合规性达246
- 框架可迁移,适合高维非凸物理系统逆向设计
由偏微分方程(PDE)控制的物理系统逆向设计因设计空间高维且非凸而计算成本高昂。现有生成模型缺乏鲁棒性和可迁移性,而进化策略虽鲁棒但难处理高维问题。本文提出神经算子驱动的拓扑感知进化策略(NOTES),融合降维、表征学习与进化优化,实现高效且可迁移的逆向设计。NOTES将基于DeepONet的神经算子与协方差矩阵自适应进化策略(CMA-ES)结合,在编码拓扑先验的紧凑隐空间中进行全局优化,可发现适用于未见工况的高性能设计。应用于由麦克斯韦方程组控制的纳米光子束偏转器逆向设计,将设计维度从256降至25,效率稳定超过95%,优于CMA-ES、拓扑优化及其他基线方法。在结构优化任务中,成功找到合规性低至246的设计。通过将DeepONet的拓扑学习与PDE求解器中的物理规律解耦,NOTES提供了一个灵活且可迁移的物理系统逆向设计框架。
原文摘要 · Abstract (English)
The inverse design of physical systems governed by partial differential equations is computationally demanding due to the high dimensionality and non-convexity of design spaces. Generative models for inverse design often lack robustness and transferability, whereas evolutionary strategies are robust but struggle in high-dimensional spaces. This paper introduces a Neural Operator-enabled Topology-informed Evolutionary Strategy (NOTES) that integrates dimensionality reduction, representation learning, and evolutionary optimization for efficient and transferable inverse design. NOTES couples a DeepONet-based neural operator with the Covariance Matrix Adaptation Evolution Strategy (CMA-ES) to perform global optimization in a compact latent space that encodes topology-aware priors while discovering high-performance designs for unseen operating conditions. Applied to nanophotonic beam-deflector inverse design governed by Maxwell's equations, NOTES reduces the design dimensionality from 256 to 25 and consistently achieves over 95 percent efficiency, outperforming CMA-ES, topology optimization, and other baselines. Applied to structural optimization, NOTES discovers designs that achieve compliance down to 246. By decoupling topology learning of a DeepONet from the governing physics in a PDE solver, NOTES provides a flexible and transferable framework for the inverse design of physical systems.
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