Essays about: "Distance measure"

Showing result 6 - 10 of 301 essays containing the words Distance measure.

  1. 6. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Lassi Linnala; [2022]
    Keywords : femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

    Abstract : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. READ MORE

  2. 7. Radar Detection Using Deep Learning

    University essay from Lunds universitet/Matematik LTH

    Author : Ziliang Xiong; Leonardo Carrera; [2022]
    Keywords : Deep Learning; Autonomous Driving; Radar; Point Cloud; Technology and Engineering;

    Abstract : This thesis aims to reproduce and improve a paper about dynamic road user detection on 2D bird's-eye-view radar point cloud in the context of autonomous driving. We choose RadarScenes, a recent large public dataset, to train and test deep neural networks. READ MORE

  3. 8. A hashing algorithm based on a one-way function in the symmetric group Sn

    University essay from Linnéuniversitetet/Institutionen för matematik (MA)

    Author : Adrian Perez Keilty; [2022]
    Keywords : cryptography; hashing; symmetric group; one way function;

    Abstract : We have found an operation between permutations in the symmetric group Sn upon which we have experimentally derived results that can be linked to desirable properties in cryptography, mainly in the domain of one-way functions. From it, we have implemented a beta version of an algorithm for a hashing function by exploiting the operation’s low computational cost for speed and its properties for security. READ MORE

  4. 9. X-ray-induced intermolecular reactions in mixed clusters

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Astrid Bergman; [2022]
    Keywords : molecular cluster; biophysics; X-ray;

    Abstract : The aim of this project was to study what mixed cluster fragments were formed in the interaction between radiation and H2O-CO2 clusters formed by adiabatic expansion, both experimentally and using simulations. The experiment was done using a mass spectrometer at the MAX IV synchrotron facility and by studying the time-of-flight of the ionic fragments. READ MORE

  5. 10. Perception accuracy and user acceptance of legend designs for opacity data mapping in GIS

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Jonas Tillman; [2022]
    Keywords : GIS; Data Visualisation; Legends; Opacity; Transparency; Visual Data Encoding; Perception; Earth and Environmental Sciences;

    Abstract : In a GIS system, the need to encode geospatial data without standardized cartographic representations, such as population data, weather information, etc., on top of a map is common. This can be done with a layer on top of a base map, with the effect that the base map is partially or fully hidden. READ MORE