用隐式神经表示实现高效参数与空间探索,节省计算与内存。
Explorable INR: An Implicit Neural Representation for Ensemble Simulation Enabling Efficient Spatial and Parameter Exploration
- 基于隐式神经表示,支持点级查询,无需重建完整场数据。
- 引入概率仿射形式,实现不确定性传播与统计分析,加速探索过程。
- 结合梯度下降与KL散度优化,可扩展至大规模参数搜索任务。
随着宇宙学和海洋学等科学领域高分辨率集合模拟计算能力的提升,存储与计算需求面临巨大挑战。现有代理模型在点或区域预测上灵活性不足,因每次参数设置都需重建完整场数据,阻碍了参数空间探索效率。同时难以准确捕捉物理属性分布并定位最优参数配置。本文提出Explorable INR,一种基于隐式神经表示的新型代理模型,旨在促进探索性分析,支持无需完整场数据即可进行点级空间查询。为缓解空间探索中的计算瓶颈,利用概率仿射形式(PAFs)实现通过Explorable INR的不确定性传播,获得统计摘要,从而支持多种昂贵的集合分析与可视化任务。此外,将参数探索问题重新表述为基于梯度下降与KL散度最小化的优化任务,确保可扩展性。实验表明,该方法在显著降低计算与内存开销的同时,仍能提供有效的集合分析能力。
原文摘要 · Abstract (English)
With the growing computational power available for high-resolution ensemble simulations in scientific fields such as cosmology and oceanology, storage and computational demands present significant challenges. Current surrogate models fall short in the flexibility of point- or region-based predictions as the entire field reconstruction is required for each parameter setting, hence hindering the efficiency of parameter space exploration. Limitations exist in capturing physical attribute distributions and pinpointing optimal parameter configurations. In this work, we propose Explorable INR, a novel implicit neural representation-based surrogate model, designed to facilitate exploration and allow point-based spatial queries without computing full-scale field data. In addition, to further address computational bottlenecks of spatial exploration, we utilize probabilistic affine forms (PAFs) for uncertainty propagation through Explorable INR to obtain statistical summaries, facilitating various ensemble analysis and visualization tasks that are expensive with existing models. Furthermore, we reformulate the parameter exploration problem as optimization tasks using gradient descent and KL divergence minimization that ensures scalability. We demonstrate that the Explorable INR with the proposed approach for spatial and parameter exploration can significantly reduce computation and memory costs while providing effective ensemble analysis.
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