Modelling Material Injection Into Porous Structures Under Non-isothermal Conditions

本文基于多孔介质理论,在考虑局部热非平衡条件下建立了用于模拟非等温环境下椎体成形术(即丙烯酸骨水泥注入松质骨)的数学模型,并通过数值模拟验证了该模型的热力学一致性与物理合理性。

Jan-Sören L. Völter (University of Stuttgart), Zubin Trivedi (University of Stuttgart), Andreas Boger (Ansbach University of Applied Sciences), Tim Ricken (University of Stuttgart), Oliver Röhrle (University of Stuttgart)Tue, 10 Ma🔬 physics

Atomistic Framework for Glassy Polymer Viscoelasticity Across Twenty Frequency Decades

该研究通过引入时间依赖记忆核的广义朗之万方程扩展非仿射变形理论,成功实现了对聚甲基丙烯酸甲酯(PMMA)玻璃态聚合物在跨越二十个数量级频率范围内粘弹性响应的统一表征,其预测结果与多种实验及模拟数据高度吻合。

Ankit Singh, Vinay Vaibhav, Caterina Czibula, Astrid Macher, Petra Christoefl, Karin Bartl, Gregor Trimmel, Timothy W. Sirk, Alessio ZacconeTue, 10 Ma🔬 cond-mat.mtrl-sci

Prediction of Steady-State Flow through Porous Media Using Machine Learning Models

该研究提出了一种基于机器学习的框架,通过对比卷积自编码器、U-Net 和傅里叶神经操作符(FNO)三种架构,发现 FNO 在预测多孔介质稳态流动方面表现最优,其均方误差低至 0.0017 且比传统计算流体力学方法快 1000 倍,同时具备网格不变性,为冷板拓扑优化提供了高效可扩展的替代方案。

Jinhong Wang, Matei C. Ignuta-Ciuncanu, Ricardo F. Martinez-Botas, Teng CaoTue, 10 Ma🤖 cs.LG

From Accurate Quantum Chemistry to Converged Thermodynamics for Ion Pairing in Solution

该研究结合机器学习与电子结构理论,通过超越标准密度泛函理论并采用“金标准”CCSD(T) 方法,成功实现了对水溶液中 CaCO₃离子对自由能的精确预测,从而解决了长期存在的计算挑战并获得了与实验一致的定量热力学结果。

Niamh O'Neill, Benjamin X. Shi, William C. Witt, Blake I. Armstrong, William J. Baldwin, Paolo Raiteri, Christoph Schran, Angelos Michaelides, Julian D. GaleTue, 10 Ma🔬 cond-mat.mtrl-sci

Physics-informed AI Accelerated Retention Analysis of Ferroelectric Vertical NAND: From Day-Scale TCAD to Second-Scale Surrogate Model

该研究提出了一种基于物理信息神经算子(PINO)的人工智能代理模型,通过嵌入物理原理,将铁电垂直 NAND 器件的阈值电压漂移和保持特性模拟速度提升了超过 10000 倍,从而克服了传统 TCAD 工具在大规模参数优化中计算成本过高的问题。

Gyujun Jeong (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Sungwon Cho (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Minji Shon (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Namhoon Kim (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Woohyun Hwang (Semiconductor Research and Development, Samsung Electronics Co., Ltd, South Korea), Kwangyou Seo (Semiconductor Research and Development, Samsung Electronics Co., Ltd, South Korea), Suhwan Lim (Semiconductor Research and Development, Samsung Electronics Co., Ltd, South Korea), Wanki Kim (Semiconductor Research and Development, Samsung Electronics Co., Ltd, South Korea), Daewon Ha (Semiconductor Research and Development, Samsung Electronics Co., Ltd, South Korea), Prasanna Venkatesan (NVIDIA, Santa Clara, CA, USA), Kihang Youn (NVIDIA, Santa Clara, CA, USA), Ram Cherukuri (NVIDIA, Santa Clara, CA, USA), Yiyi Wang (NVIDIA, Santa Clara, CA, USA), Suman Datta (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Asif Khan (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA), Shimeng Yu (School of Electrical and Computer Engineering, Georgia Institute of Technology, GA, USA)Tue, 10 Ma🤖 cs.LG

Full-Scale GPU-Accelerated Transient EM-Thermal-Mechanical Co-Simulation for Early-Stage Design of Advanced Packages

本文提出了一种 GPU 加速的瞬态电磁 - 热 - 力全耦合求解器,通过在不进行结构均质化的前提下实现大规模封装的快速全尺度仿真,解决了早期设计阶段精度与效率的权衡难题,从而能够识别传统稳态方法无法捕捉的信号诱导绝热应力等失效机制。

Hongyang Liu, Tejas Kulkarni, Ganesh Subbarayan, Cheng-Kok Koh, Dan JiaoTue, 10 Ma🔬 physics.app-ph

A semi-analytical pseudo-spectral method for 3D Boussinesq equations of rotating, stratified flows in unbounded cylindrical domains

本文提出了一种针对旋转分层流三维 Boussinesq 方程的半解析伪谱方法,该方法结合映射勒让德多项式与傅里叶展开处理无界圆柱域,并采用解析线性算子的指数时间差分(ETD)方案,成功克服了强剪切和快速恢复波导致的数值刚性问题,从而实现了大时间步长下对天体物理及地球物理涡流不稳定性的高效高精度模拟。

Jinge Wang, Philip S. MarcusTue, 10 Ma🔬 physics