Sökning: "matrix"

Visar resultat 21 - 25 av 2480 uppsatser innehållade ordet matrix.

1. 21. A C++ Matrix library for computing the Gateaux derivative of the Fermi-Dirac operator

   Kandidat-uppsats, Uppsala universitet/Avdelningen för beräkningsvetenskap

   Författare :William Samuelsson; [2023]
   Nyckelord :C ; Quantum Chemistry; Matrix functions;

   Sammanfattning : Computing the Fermi-Dirac operator is done through recursive polynomial expansions, using the SP2 and SP2 Acc algorithms. The Gateaux derivative is computed for both schemes by mapping the zeroth and first order matrices onto a block upper triangular matrix, which is implemented in Python using Numpy arrays to store full matrices and in C++ by first constructing a basic matrix library to use as blocks in a later created block upper triangular matrix library which only directly references two blocks in a 2 x 2 block matrix. LÄS MER

3. 22. Image-classification for Brain Tumor using Pre-trained Convolutional Neural Network

   Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Bushra Alsabbagh; [2023]
   Nyckelord :Brain tumor; Deep learning; Convolutional Neural Network CNN ; diagnosis; Image classification; pre-trained models; dataset; economic impact.; Cancer; Hjärntumör; Artificiell intelligens AI ; djupinlärning; konvolutionellt neuralt nätverk CNN ; Diagnostik; Bildklassificering; förtränade modeller; dataset.;

   Sammanfattning : Brain tumor is a disease characterized by uncontrolled growth of abnormal cells in the brain. The brain is responsible for regulating the functions of all other organs, hence, any atypical growth of cells in the brain can have severe implications for its functions. LÄS MER

4. 23. Tillit, misstro och motstånd : En studie av skolutvecklingsaktörers konstruktioner av skolutvecklingens villkor

   Magister-uppsats, Luleå tekniska universitet/Institutionen för hälsa, lärande och teknik

   Författare :Maria Jakobsson; [2023]
   Nyckelord :instructional; governance and management; school leader; school development; trust; mistrust; undervisnings-; styrning och ledning; skolledare; skolutveckling; tillit; misstro;

   Sammanfattning : The purpose of this study is to uncover and problematize how school management and senior teachers perceive governing and management of school development processes from a perspective of trust. The research questions are the following: “Which constructs of trust emerge among school management and senior teachers in governing and management of school development processes?” and “Which constructs of possibilities and challenges emerge among school management and senior teachers in governing and management of school development processes from a perspective of trust?” The study has a social constructivist design where a framework for evaluation of trust versus mistrust (the Trust/Mistrust matrix: TDM) was used in the analysis. LÄS MER

5. 24. Methodology for Stored Heat “Heat In Place” (HIP) assessment of geothermal aquifers – Exemplified by a study of the Arnager Greensand in SW Scania

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Oskar Sundberg; [2023]
   Nyckelord :geothermal energy; geothermal resource assessment; geothermal potential; volume method; volumetric method; recovery factor; direct use; direct heat; Mesozoic aquifers; Earth and Environmental Sciences;

   Sammanfattning : In the sedimentary bedrock of southwest Scania, located in the southernmost part of Sweden, there are several low-enthalpy Mesozoic sandstone aquifers situated at different depths. These aquifers collectively hold the potential for direct-heat geothermal utilization. LÄS MER

7. 25. Stock market analysis with a Markovian approach: Properties and prediction of OMXS30

   Kandidat-uppsats, KTH/Matematisk statistik

   Författare :Max Aronsson; Anna Folkesson; [2023]
   Nyckelord :Markov chain; OMXS30; Markov chain properties; voting ensemble model; markovkedja; OMXS30; egenskaper hos markovkedjor; ensemble-modell;

   Sammanfattning : This paper investigates how Markov chain modelling can be applied to the Swedish stock index OMXS30. The investigation is two-fold. Firstly, a Markov chain is based on index data from recent years, where properties such as transition matrix, stationary distribution and hitting time are studied. LÄS MER