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 18 of 18 for “"Geometric Framework"”.
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Good families of quantum low-density parity-check codes and a geometric framework for the amplitude-damping channel
… propagation. Furthermore, we present a general geometrical model to design non-additive quantum error-correcting codes for the amplitude-damping channel. Non-additive quantum error-correcting codes are more general than stabilizer or additive quantum errorcorrecting codes, and in some cases …
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Alternating conditional expectation (ACE) applied to classification and recommendation problems
In this thesis, a geometric framework for describing relevant information in a collection of data is applied for the general problems of selecting informative features (dimension reduction) from high dimensional data. The framework can be used in an unsupervised manner, extracting universal …
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NORMAL FORM METHODS FOR SOME NON LINEAR HAMILTONIAN PDES IN HIGHER DIMENSION
… interest and we provide a suitable algebraic and geometric framework. Proofs are based on normal form methods.
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Currency trios - using geometric concepts to visualise and interpret relationships between currencies
… forms the basis for the derivation of a geometric interpretation of the relationships between the exchange rates. In the geometric framework, the three currencies in a currency trio are represented by a triangle, where each of the vertices represents a currency. The volatilities of the …
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Survey of Generalized Contact Structures
… Generalized complex geometry provides a natural geometric framework to understand certain recent developments in string physics, and has developed into an active area of research. Very recently, an odd dimensional analogue of a generalized complex structure, namely a generalized contact …
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Practical techniques for rapid and reliable real-time adaptive filtering
… LMS algorithm at the same computational cost. A geometric framework which aids in the presentation of the new class of algorithms is developed. This framework also allows a more complete understanding of three existing LMS-type algorithms, as well as allows the proof of several important …
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A Study of the Multiple-Unicast Network Coding Conjecture Using Riemannian Manifolds
… graphs into Riemannian manifolds using a geometric framework developed by Xiahou el al. [32]. We prove that isometric embedding of graphs into a Riemannian manifold is impossible. Then, interestingly, we construct an embedding that achieves an infinitesimally small distortion. We show that …
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A Thread of Continuity
… such as scale, materials, regulating lines and geometric framework must be examined in order to decide what is to be transformed, what is to be translated, what is to be ignored. They are the means of creating the thread of continuity between what was, what is and what will be. This thread of …
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Things fall apart: the universal geometry of failure
… In this dissertation, I implement a novel geometric framework and dynamical cracking model, coupled with laboratory experimentation, to first categorize thin fractured films across the solar system, and then to validate these categorizations by creating simple but tunable experiments in …
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Curvature driven phase separation in mixed ligand coated gold nanoparticles
… that depend on the nanoparticle diameter. A geometric framework that includes a continuous and crystallographic description is established to best describe the observed behaviors.
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Classification of base geometries in F-theory
F-theory is a powerful geometric framework to describe strongly coupled type JIB supcrstring theory. After we compactify F-theory on elliptically fibered Calabi-Yau manifolds of various dimensions, we produce a large number of minimal supergravity models in six or four spacetime dimensions. In this …
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Geometry and Optimization of Relative Arbitrage
… portfolio theory provides a novel mathematical framework to analyze this phenomenon. A major result of the theory is the construction of portfolio strategies that outperform the market portfolio under realistic conditions. These portfolios are called relative arbitrage opportunities. In this …
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Identifying dynamical boundaries and phase space transport using Lagrangian coherent structures
… sets thus act as transport barriers. This geometric framework of transport barriers is used to study various problems in phase space transport, specifically problems of separation in flows that can vary in scale from the micro to the geophysical. The first problem which we study is of the …
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Geometric and Extra-Geometric Spatial Conceptualisation: A cross-linguistic and non-verbal perspective
… all past empirical work exploring the Functional Geometric Framework (FGF) proposed by Coventry and Garrod (2004) for spatial language use has been based on a single language - English. Therefore the extent to which the framework applies across languages has not been established. The current …
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Aspects of Generalized Geometry: Branes with Boundary, Blow-ups, Brackets and Bundles
… explores aspects of generalized geometry, a geometric framework introduced by Hitchin and Gualtieri in the early 2000s. In the first part, we introduce a new class of submanifolds in stable generalized complex manifolds, so-called Lagrangian branes with boundary. We establish a correspondence …
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Primate nutritional ecology: the role of food selection, energy intake, and nutrient balancing in Mexican black howler monkey (Alouatta pigra) foraging strategies
… and analyzed individual food choices using the Geometric Framework for nutrition. The GF is a multidimensional approach in which variables such as different food components and the amount of ingested nutrients are viewed in geometric space. The first chapter examines the role of resource mixing …
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Reinforcement Learning and Economic Decision-making for Nutrient Rewards in Rhesus Monkeys
… and reinforcement learning. In these frameworks, the decision-makers choose by assigning values to objects and learn by updating object values with experience. However, it remains unclear how economic values derive from the intrinsic properties of objects and how subjective values of …
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Magnitude, concentration, and metric complexity in phylogenetics and information theory
… where Vn is the covariance matrix of Yn. These geometric properties were shown to be equivalent in [8] using probabilistic tools. In this chapter, we reprove this equivalence in the language of magnitude [1], and lay a geometric framework for maximum likelihood estimation of the root state. ☐ …