Essays about: "invariant solution"

Showing result 1 - 5 of 21 essays containing the words invariant solution.

  1. 1. Gravitation in Lorentz and Euclidean Geometry

    University essay from KTH/Fysik

    Author : Niki Wilhelmson; Johan Stoyanov; [2022]
    Keywords : gravitation; gravity; euclidean geometry; isometry; laplace; helmholtz; lorentz geometry; differential geometry; general relativity; special relativity; Einstein s field equations; Lovelock; Newton;

    Abstract : The aim of this work is to derive mathematical descriptions of gravitation. Postulating gravitation as a force field, Newton's law of gravitation is heuristically derived by considering linear differential operators invariant under euclidean isometries and by finding the fundamental solution to Helmholtz equation in three dimensions. READ MORE

  3. 2. Cross-lingual Word Embeddings Beyond Zero-shot Machine Translation

    University essay from Uppsala universitet/Institutionen för lingvistik och filologi

    Author : Chen Shifei; [2020]
    Keywords : word embeddings; cross-lingual word embeddings; machine translation; multilingual machine translation; neural machine translation; zero-shot; zero-shot machine translation;

    Abstract : Zero-shot translation is a transfer learning setup that refers to the ability of neural machine translation to generalize translation information into unseen language pairs. It provides an appealing solution to the lack of available materials for low-resource languages by transferring knowledge from high-resource languages. READ MORE

  4. 3. Convergence Properties for Different Null Space Bases When Solving the Initial Margin Optimization Problem Using CMA-ES

    University essay from KTH/Matematisk statistik

    Author : Jacob Barnholdt; Filip Carlsson; [2020]
    Keywords : Financial mathematics; CMA-ES; Optimization; Initial Margin; Null space representations; Finansiell matematik; CMA-ES; Optimering; Initial Margin; Nollrumsrepresentationer;

    Abstract : This thesis evaluates how the evolutionary algorithm CMA-ES (Covariance Matrix Adaption Evolution Strategy) can be used for optimizing the total initial margin for a network of banks trading bilateral OTC derivatives. The algorithm is a stochastic method for optimization of non-linear and, but not limited to, non-convex functions. READ MORE

  5. 4. Signal background interference effects in lepton trident events with a new low mass mediator

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Patricia Andrea Gutiérrez García; [2020]
    Keywords : dark matter; pythia; matrix element corrections; LDM; Dire; Madgraph; dark photons; Physics and Astronomy;

    Abstract : In this project we present a phenomenological study of signal to background interference effects in leptonic tridents produced in parton showers. The interference effects are introduced by linking matrix element corrections of a kinetically mixed dark photon model to the parton shower Dire. READ MORE

  6. 5. Indoor navigation using vision-based localization and augmented reality

    University essay from Uppsala universitet/Institutionen för informationsteknologi

    Author : Tim Kulich; [2019]
    Keywords : ;

    Abstract : Implementing an indoor navigation system requires alternative techniques to the GPS. One solution is vision-based localization which takes advantage of visual landmarks and a camera to read the environment and determine positioning. READ MORE