Essays about: "flatness"

Showing result 1 - 5 of 31 essays containing the word flatness.

  1. 1. Dimensionality Reduction in High-Dimensional Profile Analysis Using Scores

    University essay from Linköpings universitet/Tillämpad matematik; Linköpings universitet/Tekniska fakulteten

    Author : Jonathan Vikbladh; [2022]
    Keywords : High-dimensional data; Hypothesis testing; LR test; Linear scores; Multivariate analysis; Profile analysis; Spherical distributions;

    Abstract : Profile analysis is a multivariate statistical method for comparing the mean vectors for different groups. It consists of three tests, they are the tests for parallelism, level and flatness. The results from each test give information about the behaviour of the groups and the variables in the groups. READ MORE

  3. 2. An analysis of the turbulent properties of a CME

    University essay from Uppsala universitet/Institutionen för fysik och astronomi; Uppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen

    Author : Roque Márquez Rodríguez; [2022]
    Keywords : CME; turbulence; plasma; solar wind; MHD;

    Abstract : Spectral indices and flatness scaling exponents corresponding to solar wind plasma measurements before, during and after a coronal mass ejection (CME) detected by NASA's Wind spacecraft on September 2014 have been obtained. The Politano-Pouquet (PP) law for isotropic and incompressible magnetohydrodynamic (MHD) turbulence has been validated over a series of selected time intervals. READ MORE

  4. 3. Charge transfer states at polymer solar cell interfaces : Insights from atomic-scale modeling

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Rickard Svensson; [2022]
    Keywords : organic solar cells; OSC; polymer; interface; charge transfer; non-fullerene acceptor; PYT; PBDB-T; DFT; TD-DFT; conformation; alkyl groups; methylation; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; exciton binding energy; dipole moment; open-circuit voltage; organiska solceller; OSC; polymer; gränssnitt; laddningsöverföring; icke-fullerenacceptor; PYT; PBDB-T; DFT; TD-DFT; konformation; alkylgrupper; metylering; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; excitonbindningsenergi; dipolmoment; tomgångsspänning;

    Abstract : Organic solar cells (OSCs) based on non-fullerene acceptors (NFAs) have attracted a great deal of attention in recent years due to their rapidly increasing efficiency and enormous potential. In this work, the optical and electronic properties of systems containing the very promising non-fullerene acceptor PYT have been thoroughly studied with the use of the density functional theory (DFT) and the time-dependent density functional theory (TDDFT). READ MORE

  5. 4. Motion Planning for Aggressive Flights of an Unmanned Aerial Vehicle

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

    Author : Cornelia Smith; Filippa Femic; [2022]
    Keywords : UAV; autonomous vehicle; motion planning; polytope intersection; trajectory generation; obstacle handling; collision avoidance; feasibility constraints; differential flatness;

    Abstract : Unmanned aerial vehicles are becoming more popular in today’s society, which results in the rise of laws intended to maintain safety. To abide by these, while allowing the technology to expand, functioning path-planning algorithms are required.This also includes having methods for detecting and managing obstacles. READ MORE

  6. 5. Steering Method for Nonholonomic Motion Planning based on Quadratic Programming and Differential Flatness

    University essay from KTH/Optimeringslära och systemteori

    Author : Marcus Norgren; [2021]
    Keywords : ;

    Abstract : In this thesis, an optimization based steering methods based on differential flatness and quadratic programming has been investigated. The method has been implemented into an RRT*-planner and tested in simulation. READ MORE