Prediction of perovskite-related structures in ACuO3-x (A = Ca, Sr, Ba, Sc, Y, La) using density functional theory and Bayesian optimizationOxygen vacancy ordering in perovskite-type transition-metal oxides plays an important role in the emergence of exotic electronic properties, as typified by superconducting cuprates. In this study, we…Atsuto Seko, Shintaro Ishiwata·Jan 25, 2020SaveLearn
Database development and exploration of microstructure versus process relationships using variational autoencodersThe paper demonstrates the use of variational autoencoders for graphical representation of a large database containing process-microstructure relationships. Correlating microstructural features to…Srihari Sundar, Veera Sundararaghavan·Jan 24, 2020SaveLearn
Atomic structures and orbital energies of 61,489 crystal-forming organic moleculesData science and machine learning in materials science require large datasets of technologically relevant molecules or materials. Currently, publicly available molecular datasets with realistic…Annika Stuke, Christian Kunkel, Dorothea Golze et al.·Jan 24, 2020SaveLearn
Determination of Glass Transition Temperature of Polyimides from Atomistic Molecular Dynamics Simulations and Machine-Learning AlgorithmsGlass transition temperature (Tg) plays an important role in controlling the mechanical and thermal properties of a polymer. Polyimides are an important category of polymers with wide…Chengyuan Wen, Binghan Liu, Josh Wolfgang et al.·Jan 24, 2020SaveLearn
One-dimensional moving window atomistic framework to model long-time shock wave propagationWe develop a long-time moving window framework using Molecular Dynamics (MD) to model shock wave propagation through a one-dimensional chain of atoms. The domain is divided into a purely atomistic…Alexander Davis, Vinamra Agrawal·Jan 23, 2020SaveLearn
Electron Groups in Solar Wind and Gas Discharge PlasmasThe formation of electron groups is a common phenomenon in gas discharges and space plasmas. We describe similarities between electron kinetics in solar wind, cathode region of glow discharges, and…Vladimir Kolobov, Robert Arslanbekov, Dmitry Levko·Jan 22, 2020SaveLearn
An arbitrary-order Cell Method with block-diagonal mass-matrices for the time-dependent 2D Maxwell equationsWe introduce a new numerical method for the time-dependent Maxwell equations on unstructured meshes in two space dimensions. This relies on the introduction of a new mesh, which is the…Bernard Kapidani, Lorenzo Codecasa, Joachim Schöberl·Jan 21, 2020SaveLearn
Introduction to molecular dynamics simulationsWe provide an introduction to molecular dynamics simulations in the context of the Kob-Andersen model of a glass. We introduce a complete set of tools for doing and analyzing the results of…K. Vollmayr-Lee·Jan 20, 2020SaveLearn
Machine learning models for the secondary Bjerknes force between two insonated bubblesThe secondary Bjerknes force plays a significant role in the evolution of bubble clusters. However, due to the complex dependence of the force on multiple parameters, it is highly non-trivial to…Haiyan Chen, Yue Zeng, Yi Li·Jan 20, 2020SaveLearn
First-principles studies of electronic properties in Lithium metasilicate (Li2SiO3)Lithium metasilicate (Li2SiO3) has attracted considerable interest as a promising electrolyte material for potential use in lithium batteries. However, its electronic properties are still not…Nguyen Thi Han, Vo Khuong Dien, Ngoc Thanh Thuy Tran et al.·Jan 20, 2020SaveLearn
Simplified Unified Wave-Particle Method with Quantified Model-Competition Mechanism for Numerical Calculation of Multi-Scale FlowsA Quantified Model-Competition (QMC) mechanism for multi-scale flows is extracted from the integral (analytical) solution of the Boltzmann-BGK model equation. In the QMC mechanism, the weight of the…Sha Liu, Chengwen Zhong, Ming Fang·Jan 18, 2020SaveLearn
Modal characterization of thermal emitters using the Method of MomentsElectromagnetic sources relying on spontaneous emission are difficult to characterize without a proper framework due to the partial spatial coherence of the emitted fields. In this paper, we propose…Denis Tihon, Stafford Withington, Christophe Craeye·Jan 17, 2020SaveLearn
A sparse-grid probabilistic scheme for approximation of the runaway probability of electrons in fusion tokamak simulationRunaway electrons (RE) generated during magnetic disruptions present a major threat to the safe operation of plasma nuclear fusion reactors. A critical aspect of understanding RE dynamics is to…Minglei Yang, Guannan Zhang, Diego del-Castillo-Negrete et al.·Jan 16, 2020SaveLearn
A Perspective on Regression and Bayesian Approaches for System Identification of Pattern Formation DynamicsWe present two approaches to system identification, i.e. the identification of partial differential equations (PDEs) from measurement data. The first is a regression-based Variational System…Zhenlin Wang, Bowei Wu, Krishna Garikipati et al.·Jan 16, 2020SaveLearn
On the Application of Numerical Methods to Hallen's Equation: The Case of a Lossy MediumA previous paper analyzed in detail the difficulties associated with the application of numerical methods to Hallen's integral equation with the approximate kernel for the case of a lossless…Christos Mystilidis, Panagiotis J. Papakanellos, George Fikioris et al.·Jan 16, 2020SaveLearn
Efficient Discrete-Event Based Particle Tracking Simulation for High Energy PhysicsThis work presents novel discrete event-based simulation algorithms based on the Quantized State System (QSS) numerical methods. QSS provides attractive features for particle transportation…Lucio Santi, Lucas Rossi, Rodrigo Castro·Jan 15, 2020SaveLearn
i-flow: High-dimensional Integration and Sampling with Normalizing FlowsIn many fields of science, high-dimensional integration is required. Numerical methods have been developed to evaluate these complex integrals. We introduce the code i-flow, a python package that…Christina Gao, Joshua Isaacson, Claudius Krause·Jan 15, 2020SaveLearn
Surface waves from flexural and compressional resonances of beamsWe present a three-dimensional model describing the propagation of elastic waves in a soil substrate supporting an array of cylindrical beams experiencing flexural and compressional resonances. The…Jean-Jacques Marigo, Kim Pham, Agnès Maurel et al.·Jan 15, 2020SaveLearn
Physics-Constrained Bayesian Neural Network for Fluid Flow Reconstruction with Sparse and Noisy DataIn many applications, flow measurements are usually sparse and possibly noisy. The reconstruction of a high-resolution flow field from limited and imperfect flow information is significant yet…Luning Sun, Jian-Xun Wang·Jan 15, 2020SaveLearn
Investigating the use of field solvers for simulating classical systemsWe explore the use of field solvers as approximations of classical Vlasov-Poisson systems. This correspondence is investigated in both electrostatic and gravitational contexts. We demonstrate the…Andrew Eberhardt, Arka Banerjee, Michael Kopp et al.·Jan 14, 2020SaveLearn
A Mass-transfer Particle-tracking Method for Simulating Transport with Discontinuous Diffusion CoefficientsThe problem of a spatially discontinuous diffusion coefficient (D( x)) is one that may be encountered in hydrogeologic systems due to natural geological features or as a consequence of…Michael J. Schmidt, Nicholas B. Engdahl, Stephen D. Pankavich et al.·Jan 14, 2020SaveLearn
Plasma Stratification in Radio-Frequency Discharges of Noble GasesWe conducted experimental studies and computer simulations of standing striations in capacitive coupled plasma in Argon gas. Standing striations were observed at frequencies 3.6, 8.4 and 19.0 MHz, in…Vladimir I Kolobov, Robert R Arslanbekov, Dmitry Levko et al.·Jan 14, 2020SaveLearn
Modeling transport of charged species in pore networks: solution of the Nernst-Planck equations coupled with fluid flow and charge conservation equationsA pore network modeling (PNM) framework for the simulation of transport of charged species, such as ions, in porous media is presented. It includes the Nernst-Planck (NP) equations for each charged…Mehrez Agnaou, Mohammad Amin Sadeghi, Thomas George Tranter et al.·Jan 14, 2020SaveLearn
Azimuthal decomposition study of a realistic laser profile for efficient modeling of Laser WakeField AccelerationThe advent of ultra short high intensity lasers has paved the way to new and promising, yet challenging, areas of research in the laser-plasma interaction physics. The success of constructing…Imen Zemzemi, Francesco Massimo, Arnaud Beck·Jan 14, 2020SaveLearn
Polarized Gaussian basis sets from one-electron ionsWe demonstrate that basis sets suitable for electronic structure calculations can be obtained from simple accuracy considerations for the hydrogenic one-electron ions Y(Y-1)+ for Y∈[1,Z],…Susi Lehtola·Jan 13, 2020SaveLearn