Se alla kommande seminarier i LäsIT samt seminariesidor hos doktorandseminariets hemsida, TDB, Vi2, Theory and Applications Seminars (TAS) @ UpMARC, Matematiska institutionen och The Stockholm Logic Seminar.
Måndag 27 maj
|Arno Solin, Aalto University: Know Your Boundaries: Constraining Gaussian Processes by Variational Harmonic Features|
Plats: ITC 2244, Tid: 11:15
Gaussian processes (GPs) provide a powerful framework for extrapolation, interpolation, and noise removal in regression and classification. This paper considers constraining GPs to arbitrarily-shaped domains with boundary conditions. We solve a Fourier-like generalised harmonic feature representation of the GP prior in the domain of interest, which both constrains the GP and attains a low-rank representation that is used for speeding up inference. The method scales as O(nm^2) in prediction and O(m^3) in hyperparameter learning for regression, where n is the number of data points and m the number of features. Furthermore, we make use of the variational approach to allow the method to deal with non-Gaussian likelihoods. The experiments cover both simulated and empirical data in which the boundary conditions allow for inclusion of additional physical information.
|Simon Olofsson, Imperial College London: Design of experiments for model discrimination using Gaussian process surrogates|
Plats: ITC 2345, Tid: 13:15
Many researchers and engineers study noisy processes with mechanisms and reactions that cannot be observed directly, e.g. in pharmaceutical development or chemical products manufacturing. Researchers hypothesise rival mechanistic models to explain observations, but may have insufficient data to discriminate between the hypotheses, i.e. discard inaccurate models. Optimal experimental design suggests experimental conditions maximising the expected utility from additional experiments to aid mechanistic model discrimination.
|Disputation | Dissertation|
|Tomas Wilkinson: Learning based Word Search and Visualisation for Historical Manuscript Images|
Plats: TLS (Tidskriftläsesalen), Carolina Rediviva, Tid: 10:15
Tomas Wilkinson will present and defend his PhD thesis Learning based Word Search and Visualisation for Historical Manuscript Images.
|Licentiatseminarium | Licentia|
|Anton Artemov: Inverse Factorization in Electronic Structure Theory: Analysis and Parallelization|
Plats: ITC 2347, Tid: 10:15
External examiner is Associate Professor Lars Karlsson from Umeå University
|Disputation | Dissertation|
|Amit Suveer: Methods for Processing and Analysis of Biomedical TEM Images|
Plats: ITC 2446, Tid: 10:15
Amit Suveer will present and defend his PhD thesisMethods for Processing and Analysis of Biomedical TEM Images.
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