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Atomistic structures of materials offer valuable insights into their functionality. Determining these structures remains a fundamental challenge in materials science, especially for systems with defects. While both experimental and…

材料科学 · 物理学 2025-01-16 Haili Jia , Yiming Chen , Gi-Hyeok Lee , Jacob Smith , Miaofang Chi , Wanli Yang , Maria K. Y. Chan

Semiconductor lasers have been rapidly evolving to meet the demands of next-generation optical networks. This imposes much more stringent requirements on the laser reliability, which are dominated by degradation mechanisms (e.g., sudden…

机器学习 · 计算机科学 2022-11-08 Khouloud Abdelli , Helmut Griesser , Christian Neumeyr , Robert Hohenleitner , Stephan Pachnicke

X-ray absorption fine structure (XAFS) and x-ray emission spectroscopy (XES) are advanced x-ray spectroscopies that impact a wide range of disciplines. However, unlike the majority of other spectroscopic methods, XAFS and XES are…

We describe an ab initio approach to simulate L-edge X-ray absorption (XAS) and 2p3d resonant inelastic X-ray scattering (RIXS) spectroscopies. We model the strongly correlated electronic structure within a restricted active space and…

化学物理 · 物理学 2023-06-01 Seunghoon Lee , Huanchen Zhai , Garnet Kin-Lic Chan

Auger electron spectroscopy (AES) and electron energy loss spectroscopy (EELS) in a reflection mode are compared as the methods for phase composition investigation of thin film oxide systems by ion profiling. As an example, the Al/Al2O3/Si…

材料科学 · 物理学 2007-05-23 V. G. Beshenkov , V. A. Marchenko , V. T. Volkov , A. G. Znamenskii

Terahertz (THz) sensing is a promising imaging technology for a wide variety of different applications. Extracting the interpretable and physically meaningful parameters for such applications, however, requires solving an inverse problem in…

计算机视觉与模式识别 · 计算机科学 2019-10-30 Tak Ming Wong , Matthias Kahl , Peter Haring Bolívar , Andreas Kolb , Michael Möller

On- and off-axis electron energy loss spectroscopy (EELS) is a powerful method for probing local electronic structure on single atom level. However, many materials undergo electron-beam induced transformation during the scanning…

We applied machine learning to the entire data history of ESO's High Accuracy Radial Velocity Planet Searcher (HARPS) instrument. Our primary goal was to recover the physical properties of the observed objects, with a secondary emphasis on…

太阳与恒星天体物理 · 物理学 2024-12-13 Vojtěch Cvrček , Martino Romaniello , Radim Šára , Wolfram Freudling , Pascal Ballester

We investigate the application of deep learning techniques employing the conditional variational autoencoders for semi-supervised learning of latent parameters to describe phase transition in the two-dimensional (2D) ferromagnetic Ising…

统计力学 · 物理学 2023-06-30 Adwait Naravane , Nilmani Mathur

We used interpretable machine learning to combine information from multiple heterogeneous spectra: X-ray absorption near-edge spectra (XANES) and atomic pair distribution functions (PDFs) to extract local structural and chemical…

材料科学 · 物理学 2025-04-14 Tanaporn Na Narong , Zoe N. Zachko , Steven B. Torrisi , Simon J. L. Billinge

This review aims to introduce the x-ray emission spectroscopy (XES) and resonant inelastic x-ray scattering (RIXS) techniques to the materials scientist working with magnetic semiconductors (e.g. semiconductors doped with 3d transition…

材料科学 · 物理学 2014-01-20 Mauro Rovezzi , Pieter Glatzel

In this study, we explore the potential of machine learning for modeling molecular electronic spectral intensities as a continuous function in a given wavelength range. Since presently available chemical space datasets provide excitation…

化学物理 · 物理学 2022-08-02 Prakriti Kayastha , Sabyasachi Chakraborty , Raghunathan Ramakrishnan

Many important problems in science and engineering require solving the so-called parametric partial differential equations (PDEs), i.e., PDEs with different physical parameters, boundary conditions, shapes of computational domains, etc.…

数值分析 · 数学 2024-02-06 Zhanhong Ye , Xiang Huang , Hongsheng Liu , Bin Dong

X-ray Photoelectron Spectroscopy (XPS) is a powerful technique to probe chemical states and interfacial processes in battery materials, but a quantitative interpretation is often hindered by the complex, heterogeneous microstructures that…

Compared to humans, machine learning models generally require significantly more training examples and fail to extrapolate from experience to solve previously unseen challenges. To help close this performance gap, we augment single-task…

机器学习 · 计算机科学 2018-07-27 Tailin Wu , John Peurifoy , Isaac L. Chuang , Max Tegmark

Analysis of X-ray Photon Correlation Spectroscopy (XPCS) data for non-equilibrium dynamics often requires manual binning of age regions of an intensity-intensity correlation function. This leads to a loss of temporal resolution and…

信号处理 · 电气工程与系统科学 2022-01-21 Tatiana Konstantinova , Lutz Wiegart , Maksim Rakitin , Anthony M DeGennaro , Andi M Barbour

X-ray absorption near edge structure (XANES) is an essential tool for elucidating the atomic-scale, local three-dimensional (3D) structure of given materials and molecules. The rapid computation of XANES based on molecular 3D structures…

化学物理 · 物理学 2026-02-24 Fei Zhan , Zhi Geng

Simulation of spectra of x-ray absorption spectroscopy (XAS) at the L-edge is a well-established and reliable computational tool that, in combination with experimental measurements, reveals details about the local electronic structure and…

材料科学 · 物理学 2021-07-29 Johann Lueder

Accurate predictions of reactive mixing are critical for many Earth and environmental science problems. To investigate mixing dynamics over time under different scenarios, a high-fidelity, finite-element-based numerical model is built to…

机器学习 · 统计学 2021-03-17 B. Ahmmed , M. K. Mudunuru , S. Karra , S. C. James , V. V. Vesselinov

The manifold hypothesis states that high-dimensional data can be modeled as lying on or near a low-dimensional, nonlinear manifold. Variational Autoencoders (VAEs) approximate this manifold by learning mappings from low-dimensional latent…

机器学习 · 统计学 2021-03-03 Marissa C. Connor , Gregory H. Canal , Christopher J. Rozell