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 20 of 132 for “"Adaptivity"”.
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Model adaptivity for goal-oriented inference
In scientific and engineering contexts, physical systems are represented by mathematical models, characterized by a set of parameters. The inverse problem arises when the parameters are unknown and one tries to infer these parameters based on observations. Solving the inverse problem can require …
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Fine-grained Adaptivity for Dynamic On-chip Networks
… this dissertation proposes fine-grained adaptivity for NoCs. Fine-grained adaptive NoCs provide the ability to adjust NoC resources to the dynamically changing communication requirements during runtime. Specifically, we introduce three novel, adaptive NoC designs that each target a …
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Error estimation and adaptivity in deformable solid dynamics
In this dissertation we study the error due to the temporal discretization in numerical simulations of deformable solid dynamics . For that, we start from the semidiscrete equations of motion and analyze the conditions that an estimator must satisfy to compute accurate results. With them, two …
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Adaptivity of Sensory Representations in the Adult Visual Cortex
Die sich entwickelnden sensorischen Areale des Gehirns werden geformt durch eine Kombination von Umwelteinflüssen und generischen Faktoren. Experimentelle Studien haben jedoch gezeigt, dass sie auch im adulten Tier erstaunlich adaptiv sind. Wie untersuchen die Repräsentation visueller Information …
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Smoothness and Adaptivity in Nonlinear Optimization for Machine Learning Applications
… new insights into understanding the role of adaptivity in optimization for machine learning applications. First, inspired by some recent works and insights from deep neural network training, we propose a generalized non-uniform smoothness condition with the Hessian norm bounded by a function …
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Expressing application and network adaptivity : time variations and adaptation paths
Existing wireless networks provide a wide variety of service capabilities. Due to the inherent nature of wireless transmissions, these services are often characterized by high error rates, variable bandwidths and delays, and unpredictable interruptions. Users and applications are somewhat adaptive …
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Biosignal-based Adaptivity in eXtended Reality towards Mental State Assessment and Regulation
L'abstract è presente nell'allegato / the abstract is in the attachment
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Continuous-Time and Companding Digital Signal Processors Using Adaptivity and Asynchronous Techniques
… DSPs examined in this thesis is the notion of "adaptivity" or "adaptability." Adaptive DSPs dynamically change their behavior to adjust to some property of their input stream, for example the rate of change of the input. This thesis presents both enhancements to existing adaptive DSPs, as well …
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4D-Printing with Cellulose Nanocrystal Thermoplastic Nanocomposites: Mechanical Adaptivity and Thermal Influence
… and the influence of temperature on mechanical adaptivity, thermal stability, and rheology. CNC thermoplastic nanocomposites are a water responsive, mechanically adaptive material that has been gaining interest in additive manufacturing for 4D-printing applications. Using a desktop FlashForge …
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Multilevel Mesh Adaptivity for Elliptic Boundary Value Problems in two and three Space Dimensions
In this work we have developed, implemented and tested a new multilevel hybrid algorithm for the adaptive finite element solution of a general class of variational problems. Our multilevel hybrid algorithm is a combination of node movement, edge swapping and local h-refinement. The adaptive …
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The role of adaptivity in a numerical method for the Cox-Ingersoll-Ross model
We demonstrate the effectiveness of an adaptive explicit Euler method for the approximate solution of the Cox-Ingersoll-Ross model. This relies on a class of path-bounded timestepping strategies which work by reducing the stepsize as solutions approach a neighbourhood of zero. The method is hybrid …
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The Impact of Local Item Dependence on Computer Adaptive Testing given Between and Within Testlet Adaptivity
… may not be fully realized with this approach of adaptivity. To increase the accuracy and efficiency in testlet-based CATs, between and within testlet adaptivity was studied. Other manipulated variables were the level of adaptivity, different testlet/item selection approaches, latent trait …
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Computation of upper and lower bounds in limit analysis using second-order cone programming and mesh adaptivity
Limit analysis is relevant in many practical engineering areas such as the design of mechanical structures or the analysis of soil mechanics. Assuming a rigid, perfectly-plastic solid subject to a static load distribution, the problem of limit analysis consists of finding the minimum multiple of …
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Contextual Effects in Tax Research: An Experimental Investigation of Adaptivity and Expert Performance in an Information Search Task
Based on a detailed analysis of the two tax decision-making contexts, planning and compliance, I predict that tax practitioners who know that the contexts differ in particular ways will conduct broader information search in planning than in compliance. I also predict that the nature of the decision …
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Phase-based adaptive dynamic load balancing for parallel tree computation
… identified. Two major variants of phase-based adaptivity are distinguished. In parametric adaptivity, parameters of the DLB algorithm are adapted between phases; in algorithmic adaptivity, different DLB algorithms are utilised in each phase. These concepts are investigated quantitatively …
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A Runtime Framework for Adaptive Compositional Modeling
… eventually at the object code level. Studying adaptivity and runtime composition issues in such systems is becoming an important focus of systems research. In this thesis, we describe an object-level framework that will manipulate an object module to instrument control functionality and …
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Disastrous Opportunities: Designing for post-hurricane adaptivity using low carbon construction methods on the destroyed site of Belle Creole, St Martin: a construction research center
… industry, their concerns denote a need for adaptivity to future disasters to enable a new sustainable economy that is not constrained by European and French regulations and empowers the local government to act on its own to explore methodologies of resilience. This thesis answers some of …
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Adaptive mechanisms for self-aware multicore systems
… systems, we must identify useful sources of adaptivity. This thesis will show the effectiveness of a number of adaptive mechanisms for self-aware multicore systems. We show that adding these mechanisms improves efficiency, and then make a case for coordinated adaptive systems. Coordinated …
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Duality methods for time-space adaptivity to calculate the numerical solution of partial differential equations = Métodos de dualidad para adaptación espacio-temporal en la resolución numérica de ecuaciones en derivadas parciales
En esta tesis presentamos un método adaptativo espacio-temporal para calcular de forma eficiente la solución numérica de EDP’s, especialmente en problemas dependientes del tiempo. Formularemos el método en primer lugar para ecuaciones de reacción-difusión y después generalizaremos para todo tipo de …
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