Sökning: "David Hu"

Hittade 5 uppsatser innehållade orden David Hu.

  1. 1. Product-development for laser powder bed fusion

    Kandidat-uppsats, KTH/Produktionsutveckling

    Författare :Ludvig Dagberg; David Hu; [2023]
    Nyckelord :Laser Powder Bed Fusion; Additive Manufacturing; DFAM; Selective Laser Melting; Design for Additive Manufacturing; Laser beam fusion;

    Sammanfattning : This thesis investigates the differences in the design process when developing a product for additive manufacturing (AM) compared to traditional manufacturing methods, such as CNC machining. In recent years, additive manufacturing (AM), including metal-based laser powder bed fusion (L-PBF), has gained popularity, leading to increased adoption by companies. LÄS MER

  3. 2. Practical implementation and exploration of dual energy computed tomography methods for Hounsfield units to stopping power ratio conversion

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Medicinsk strålningsvetenskap

    Författare :David Kennbäck; [2018]
    Nyckelord :computed tomography; CT; dual energy; DECT; dual energy computed tomography; dual energy CT; HU; SPR; Skandion; Skandionkliniken; Hounsfield; Hounsfield unit; Stopping power ratio;

    Sammanfattning : The purpose of this project was to explore the performance of methods for estimating stopping power ratio (SPR) from Hounsfield units (HU) using dual energy CT scans, rather than the standard single energy CT scans, with the aim of finding a method which could outperform the current single energy stoichiometric method. Such a method could reduce the margin currently added to the target volume during treatment which is defined as 3. LÄS MER

  4. 3. Transmission Properties of an Electron in One Dimensional Crystals with Periodic Potentials

    Kandidat-uppsats, KTH/Teoretisk fysik

    Författare :David Hu Boxi; Dan Von Martens; [2011]
    Nyckelord :;

    Sammanfattning : In 2010, R. Olsen and G. Vignale, published a paper presenting a recursive method for calculating electron transmission probability for one dimensional periodic potentials. LÄS MER

  5. 4. Dodging the Leveraged ETF Bullet - An Innovative Trading Strategy

    C-uppsats, Handelshögskolan i Stockholm/Institutionen för finansiell ekonomi

    Författare :David Boxi Hu; Henrik Bark; [2010]
    Nyckelord :SPY; SSO; Leveraged ETF; Tracking Error; Trading Strategy;

    Sammanfattning : Two main parts, with separate purposes constitute this thesis. Firstly, ETFs and Leveraged ETFs are demystified in an indepth descriptive manor. In a short period of time ETFs have reached immense popularity, but investor knowledge and sophistication is lagging. LÄS MER

  7. 5. Rättssäkerhet och anstånd med betalning av skatt : En analys av 17 kap. 2 § p. 2-3 Skattebetalningslagen ur ett rättssäkerhetsperspektiv

    Magister-uppsats, IHH, Rättsvetenskap

    Författare :David Axelsson; Jesper Ingemarsson; [2007]
    Nyckelord :Tax Law; postponement of payment of tax; legal security; Skatterätt; anstånd och rättssäkerhet;

    Sammanfattning : The aim of this thesis is to investigate whether legal rights are upheld when wording and applying the postponement of payment of tax regulations of chapter 17 section 2 p. 2-3 of the payment of Tax Act. We also investigate how the wording of the regulations relate to the requirement of legal security. LÄS MER