Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"vector models"”.
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Finding back home: from vector models to virtual forests
… In chapter 2, I introduce the ASV model, a vector-based image encoding algorithm, and outline how it can be used both for navigation and the analysis of image symmetry. I show that the ASV method's usefulness for navigation is closely linked to the local visual makeup of a location and its …
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Critical behavior of the n-vector and charged n-vector models from an exact solution to the screening approximation
Within the screening approximation the n-vector model can be solved exactly. Results for the high temperature phase are presented here. For 1arge n there is the expected agreement with the 1/n expansion results while for small n we explore the nonexistence of a solution in the regime of spatial …
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Topics in quantum field theory and holography
… of this thesis, we will study free fermions as models for topological insulators, on gravitational backgrounds which include both torsion and curvature, in d = 2 + 1 and d = 4 + 1 dimensions. We compute the parity-odd effective actions for these systems, and use these effective actions to deduce …
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Applications of Stein's method and large deviations principle's in mean-field O(N) models
… our results to mean-field classical $N$-vector models, for integers $N \ge 2$. We will use the theory of large deviations and Stein's method to study the total spin and its typical behavior, specifically obtaining non-normal limit theorems at the critical temperatures and central limit …
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Modelling and comparing OECD countries' consumer behaviour
… such a broad coverage of private sector data and models. Using the Johansen procedure we build structural ECMs based upon consumption, income and inflation allowing for heterogeneous dynamics across countries and considering whether an intercept should be included in, or excluded from, the …
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Morphodynamics, sedimentation and sediment dynamics of a gravel beach
… based on traditional moments. Sediment trend vector models based on sorting alone out-performed a traditional approach. Moments of a surface grain-size'distribution appear to be inappropriate to characterise sedimentological change at time-scales gi-eater than a semi-diurnal tidal cycle. …
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Application of renormalization-group techniques to random magnetic systems
… the Wilson-Fisher E-expansion to random n-vector models; Khme1'nitsky discovered that the random Ising model (n = 1) possessed a ""random"" fixed point of 0(squareroot(e)). This fixed point was found to have one marginal and one irrelevant operator. We have investigated the stability of …
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Prediction of Severity of Aviation Landing Accidents Using Support Vector Machine Models
<p>The purpose of this study was to apply support vector machine (SVM) models to predict the severity of aircraft damage and the severity of personal injury during an aircraft approach and landing accident and to evaluate and rank the importance of 14 accident factors to the severity. Three new …
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Enriching Word Representation Learning for Affect Detection and Affect-Aware Recommendations
… state-of-the-art emotion-aware recommendation models by systematically leveraging these features. Second, we study the problem of pre-processing in word representation learning for affective tasks. Most early models of affective tasks employed pre-trained word embedding. While pre-processing in …
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Entanglement, topology, & renormalization
… duality between the singlet sector of O(N) vector models at large N and higher spin gauge theory on Anti de Sitter (AdS) space, we develop an exact renormalization group (ERG) framework for discussing the renormalization of a large class of O(N) singlet states. We will show that for the …