TRIPODS+X:RES: Collaborative Research: Creating Inference from Machine Learned and Science Based Generative Models

TRIPODS X:RES：协作研究：从机器学习和基于科学的生成模型中创建推理

• 批准号: 1839217
• 负责人: Uros Seljak
• 金额: $ 39.94万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1839217&HistoricalAwards=false
• 关键词: TRIPODS+X; RES; Collaborative; Research; Creating

In many scientific disciplines computational simulations are used to enhance our understanding of physical processes of complex systems. In all such simulations simplifications are required to make the problem tractable, limiting the scope of the questions that can be addressed. Generally, computational simulations of large systems with many interacting components, based on the governing physics, requires complex and time consuming computations. This project will apply deep learning neural networks (NN) with geometric transformations based on the physics of the system to accurately approximate traditional physics-based computational simulations in a highly efficient manner. The increased efficiency imparted by the NN model will facilitate the asking of scientific questions which are currently computationally intractable. While the proposed work will focus on using this method to discover new strain-induced polar phases and phase competition, and to understand the large-scale structure in the universe, the concepts developed in this work can be applied to computational simulations in other scientific disciplines.The proposed work will focus on the development of foundational data science methods and the application of these methods to augment computationally-expensive science-based generative models in a way that is principled and efficient, thereby enabling improved data-driven scientific inference. The work will place specific emphasis on the design of neural network models, which through physically-significant domain architectures can approximate N-body and highly-correlated phenomena with minimal loss of information. The work will develop tools to guide the discovery and experimental synthesis of new strain-induced polar phases and phase competition, which exhibit enhanced electromechanical responses; and it will expand our simulation capabilities and understanding of the large-scale structure in the universe. Ultimately, this work will provide both domain specific advances, as well as a framework for other domain areas to augment computationally intensive, highly-correlated, N-body problems with data-driven models, which respect the physics of the problem and lead to increased computational efficiency.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在许多科学学科中，计算模拟被用来增强我们对复杂系统的物理过程的理解。在所有这样的模拟中，需要简化以使问题易于处理，限制可以处理的问题的范围。通常，基于控制物理的具有许多相互作用组件的大型系统的计算模拟需要复杂且耗时的计算。该项目将应用深度学习神经网络（NN）与基于系统物理的几何变换，以高效的方式精确近似传统的基于物理的计算模拟。神经网络模型带来的效率的提高将有助于解决目前在计算上难以解决的科学问题。虽然提出的工作将侧重于使用这种方法来发现新的应变诱导的极性相和相竞争，并了解宇宙中的大规模结构，但本工作中发展的概念可以应用于其他科学学科的计算模拟。建议的工作将侧重于基础数据科学方法的发展和这些方法的应用，以一种有原则和有效的方式增强计算昂贵的基于科学的生成模型，从而实现改进的数据驱动的科学推理。这项工作将特别强调神经网络模型的设计，通过物理上重要的领域架构，可以以最小的信息损失近似n体和高度相关的现象。该工作将开发工具来指导发现和实验合成新的应变诱导极性相和相竞争，它们表现出增强的机电响应；它将扩展我们的模拟能力和对宇宙大尺度结构的理解。最终，这项工作将提供特定领域的进展，以及其他领域的框架，以增强计算密集型，高度相关的n体问题与数据驱动模型，这尊重问题的物理性质，并导致提高计算效率。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Translation and rotation equivariant normalizing flow (TRENF) for optimal cosmological analysis

用于最佳宇宙学分析的平移和旋转等变归一化流 (TRENF)

• DOI: 10.1093/mnras/stac2010
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Dai, Biwei;Seljak, Uroš
• 通讯作者: Seljak, Uroš

FlowPM: Distributed TensorFlow implementation of the FastPM cosmological N-body solver

• DOI: 10.1016/j.ascom.2021.100505
• 发表时间: 2020-10
• 期刊: Astron. Comput.
• 作者: C. Modi;F. Lanusse;U. Seljak

Marginal unbiased score expansion and application to CMB lensing

边际无偏分数扩展及其在 CMB 透镜中的应用

• DOI: 10.1103/physrevd.105.103531
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Millea, Marius;Seljak, Uroš
• 通讯作者: Seljak, Uroš

Kepler Data Analysis: Non-Gaussian Noise and Fourier Gaussian Process Analysis of Stellar Variability

• DOI: 10.3847/1538-3881/ab8460
• 发表时间: 2020-05-01
• 期刊: ASTRONOMICAL JOURNAL
• 影响因子: 5.3
• 作者: Robnik, Jakob;Seljak, Uros
• 通讯作者: Seljak, Uros

High mass and halo resolution from fast low resolution simulations

通过快速低分辨率模拟获得高质量和光晕分辨率

• DOI: 10.1088/1475-7516/2020/04/002
• 发表时间: 2020
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: Dai, Biwei;Feng, Yu;Seljak, Uroš;Singh, Sukhdeep
• 通讯作者: Singh, Sukhdeep