Essays about: "kernel density"

Showing result 11 - 15 of 45 essays containing the words kernel density.

  1. 11. Linear-scaling Quantum Molecular Dynamics for Reactive Systems

    University essay from Uppsala universitet/Institutionen för informationsteknologi

    Author : Linnéa Andersson; [2021]
    Keywords : ;

    Abstract : The purpose of this thesis is to demonstrate linear-scaling, energy stable, propagation of the electronic degrees of freedom in finite temperature ExtendedLagrangian Born-Oppenheimer Molecular Dynamics for reactive systems in aself-consistent charge density-functional tight-binding formulation. The inverse Jacobian kernel matrix in the electronic equation of motion is approximated using alow-rank combination of directional derivatives of the ground state residual function. READ MORE

  2. 12. Accelerating bulk material property prediction using machine learning potentials for molecular dynamics : predicting physical properties of bulk Aluminium and Silicon

    University essay from Linköpings universitet/Teoretisk Fysik

    Author : Nicholas Sepp Löfgren; [2021]
    Keywords : machine learning; moment tensor potential; kernel ridge regression; molecular dynamics; density functional theory; materials science; data-driven materials design; maskininlärning; molekylärdynamik; täthetsfunktionalteori; materialvetenskap; datadriven materialdesign;

    Abstract : In this project machine learning (ML) interatomic potentials are trained and used in molecular dynamics (MD) simulations to predict the physical properties of total energy, mean squared displacement (MSD) and specific heat capacity for systems of bulk Aluminium and Silicon. The interatomic potentials investigated are potentials trained using the ML models kernel ridge regression (KRR) and moment tensor potentials (MTPs). READ MORE

  3. 13. A Topology-Based Method for Inferring Turbulence in Unsteady Flows

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Tobias Edwards; [2021]
    Keywords : ;

    Abstract : Understanding the rise and evolution of turbulence is an important component of designing vehicles and turbomachinery that both have long life and are efficient. To this end, researchers study the complex phenomenon of turbulence. READ MORE

  4. 14. Kernel density estimators as a tool for atmospheric dispersion models

    University essay from Umeå universitet/Institutionen för fysik

    Author : Daniel Egelrud; [2021]
    Keywords : Particle model; LPELLO; kernel density estimation; field of concentration; post-processing;

    Abstract : Lagrangian particle models are useful for modelling pollutants in the atmosphere. They simulate the spread of pollutants by modelling trajectories of individual particles. However, to be useful, these models require a density estimate. The standard method to use has been boxcounting, but kernel density estimator (KDE) is an alternative. READ MORE

  5. 15. Applying Generative Adversarial Networks for the Generation of Adversarial Attacks Against Continuous Authentication

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Zijian Fan; [2020]
    Keywords : ;

    Abstract : Cybersecurity has been a hot topic over the past decades with lots of approaches being proposed to secure our private information. One of the emerging approaches in security is continuous authentication, in which the computer system is authenticating the user by monitoring the user behavior during the login session. READ MORE