Examensarbeten för masterexamen // Master Theses

Länka till denna samling:

https://odr.chalmers.se/handle/20.500.12380/53

Browse

Browsar Examensarbeten för masterexamen // Master Theses efter Ämnesord "Annan fysik"

Visar 1 - 2 av 2
  • Bild (thumbnail)
    Post
    Internal Evolution for Agent Cognition - Agent-Based Modelling of an Artificial Stock Market
    (2011) Hassanzadeh, Morteza; Chalmers tekniska högskola / Institutionen för energi och miljö; Chalmers University of Technology / Department of Energy and Environment
    Agent-Based Modeling (ABM) is a powerful simulation technique with applications in several fields, in particular social sciences. Artificial Stock Market (ASM), introduced by a group of researchers at Santa Fe Institute (SFI) in the mid 90’s, is one of the pioneering works in which the application of agent-based modeling is examined being used to model a stock market and to study economic behavior. A number of heterogeneous agents form a market in which they buy and sell shares of a single introduced asset and they make their decision upon their expectations of the market which is determined from their aggregate expectations, while they improve their predictions based on the response they get from the market. The computer simulation of the model gives a market dynamics which has similarities with real market data. The internal evolution of agents has a direct effect on the market dynamics, and the learning speed of agents controls the overall qualitative characteristics of the market. With emphasis on the role of evolution of agents in this artificial stock market, an implementation of the model has been done and a few issues have been studied.
  • Bild (thumbnail)
    Post
    Measurement and Validation for Electron Beam Melting
    (2018) Malm, Calle; Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap; Chalmers University of Technology / Department of Space, Earth and Environment
    Magnetic lenses are crucial components in the electron beam melting process used for 3d-printing at Arcam. Validating that the lenses going into machine production are within specification is important. Therefore, this thesis has modified and confirmed a measurement setup, the field mapper, to be used for measurement and validation of magnetic lenses. The field mapper was then used to investigate normal behaviour of the focus and deflection lenses going into machine production as well as recreating defects of faulty lenses of the deflection and astigmatism lens to ascertain if machine integrity is compromised for respective defect. The focus lens revealed a non-significant spread, the deflection lens presented a wider spread that is easily compensated for in the machine calibration process, and for the comparison between an astigmatism lens to the same lens with an introduced winding error a significant change in the centre of zero-field was seen.