Sökning: "the matrix structure"

Visar resultat 16 - 20 av 293 uppsatser innehållade orden the matrix structure.

  1. 16. 3D printing of ceramic composites with improved mechanical strength

    Master-uppsats, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Liu Yuchen; [2023]
    Nyckelord :;

    Sammanfattning : AbstractCeramic materials have a wide range of applications in many fields, but their fragility limits theiruse in high strength and high stress environments. Therefore, by combining ceramic materialswith reinforcing agents, their mechanical properties can be improved. LÄS MER

  3. 17. Formativ bedömning i svenskämnet: : 11 elevers bearbetningar på deras berättande texter utifrån en lärares skriftliga återkoppling.

    Uppsats för yrkesexamina på avancerad nivå, Södertörns högskola/Lärarutbildningen

    Författare :Thea Wuopio-Mogestedt; [2023]
    Nyckelord :Text triangle; formative assessment; feedback; pupil s texts and teacher analysis; Texttriangeln; formativ bedömning; återkoppling; elevtexter och läraranalys;

    Sammanfattning : This study's aim is to evolve knowledge about formative assessment of writing by investigating how pupils in grade 5 in elementary school rewrite their narrative stories based on their teachers feedback in writing. The questions that will be answered is; What type of formative assessment does the teacher provide the students with? and How do the students rewrite their narrative stories based on the teachers formative assessment? The study builds on a text analysis which is based on two theories. LÄS MER

  4. 18. A Multi-Level Extension of the Hierarchical PCA Framework with Applications to Portfolio Construction with Futures Contracts

    Master-uppsats, KTH/Matematisk statistik

    Författare :Kajsa Bjelle; [2023]
    Nyckelord :Portfolio construction; asset allocation; principal component analysis; hierarchical principal component analysis; hierarchical shrinkage; eigenportfolio risk; Portföljkonstruktion; tillgångsallokering; principalkomponentanalys; hierarkisk principalkomponentanalys; hierarkisk krympning; egenportföljrisk;

    Sammanfattning : With an increasingly globalised market and growing asset universe, estimating the market covariance matrix becomes even more challenging. In recent years, there has been an extensive development of methods aimed at mitigating these issues. LÄS MER

  5. 19. Multi-Scale Topology Optimization of Lattice Structures Using Machine Learning

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanik

    Författare :Julia Ibstedt; [2023]
    Nyckelord :Topology optimization; Multi-scale topology optimization; Machine learning; Gaussian process; Homogenization; Inverse homogenization; Anisotropic materials; Symmetry groups; Material property space; Topologioptimering; Flerskalig topologioptimering; Maskininlärning; Gaussian process; Homogenisering; Anisotropa material; Symmetrigrupper; Materialegenskapsrymd;

    Sammanfattning : This thesis explores using multi-scale topology optimization (TO) by utilizing inverse homogenization to automate the adjustment of each unit-cell's geometry and placement in a lattice structure within a pressure vessel (the design domain) to achieve desired structural properties. The aim is to find the optimal material distribution within the design domain as well as desired material properties at each discretized element and use machine learning (ML) to map microstructures with corresponding prescribed effective properties. LÄS MER

  7. 20. Aligning Mitre attack framework with threat analysis and risk assesment (TARA) to support R155 compliance

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Zainab Anifowose; [2023]
    Nyckelord :Automotive; Connected vehicle; TARA; ISO 21434; R155; MITRE;

    Sammanfattning : Cyber security is evidently more important in todays and tomorrows connected and autonomous vehicles because the increasing connectivity in these vehicles is widening the vehicle attack surface area. Without having a cyber-secure vehicle, it is not possible to argue that connected and autonomous vehicles are safe for all road-users. LÄS MER