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 59 for “"Free parameters"”.
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Supervised Calibration and Uncertainty Quantification of Subgrid Closure Parameters using Ensemble Kalman Inversion
… updates alter the dependency of a model on its free parameters, evidence about structural biases is often muddied by the variable influences of inadequately-tuned parameters on the model solution. We elaborate a framework for model development that combines calibration, sensitivity analysis, and …
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Zero modes and degrees of freedom of topological solitons on the plane
… we determine the number of continuous free parameters describing the largest family of solutions, with these vortices as members. This is accomplished by obtaining the zero modes of the vortices. For the Ginzburg-Landau model we show that the multivortices do not belong to a larger …
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Diskriminative Modellkombination in Spracherkennungssystemen mit großem Wortschatz
… DMC is based on a discriminative training of the free parameters of distributions belonging to the exponential family. It is independent of the combined models and allows for the automatic combination of any set of models of any kind. The smoothed empirical word error rate is exploitet as …
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Calibrating a Latent Order Book Model to Market Data
… solution is calibrated using likelihood-free methods, Approximate Bayesian Computation (ABC) and an iterative extension, Population Monte-Carlo ABC (PMC-ABC) as well as a Black-box approach using the Nelder-Mead algorithm. We show that in the diffusion limit, the master equation becomes …
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Symbolic computation of electron-proton to slepton-squark scattering cross sections based on a left-right supersymmetric extension of the standard model
… cross sections, based on numerical values of the free parameters of the left-right supersymmetric model, are generated.
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The Role of MHD Waves and Ambipolar Diffusion in the Formation of Interstellar Cloud Cores and Protostars
… and vice versa are investigated, as are other free parameters that enter the problem because of the presence of the MHD waves. (The dependence of the solution on the free parameters that appear in the two-fluid, four-fluid, and five-fluid MHD equations in the absence of waves has been …
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Symmetries of the scalar sector of multi-Higgs-doublet models
… multi-Higgs-doublet-models. The huge number of free parameters in the scalar potential in these models, makes it impossible to study the most general case for any N. In order to reduce the number of free parameters, one could impose symmetries on the scalar potential. Therefore, it is important …
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Two-dimensional models of goal-oriented trial-to-trial error correction dynamics for a redundant goal : a constructive comparison
… show that the correction or controller with free parameters in two independent directions is necessary to describe two-dimensional tasks in general. However, we cannot conclude in favor of one model over the other, because simulations also show that either of the different noise processes is …
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Gravitational waves from a string cusp in Einstein-aether theory
… features in the waves. They depend on two free parameters: roughly the wave speed and the acceleration of the string cusp. The profile of the wave is analyzed in detail for different values of the parameters and explained by close comparison with the string motion.
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Connecting Small-Angle Diffraction With Real-Space Images by Quantitative TEM of Amorphous Thin Films
… on this scale, but data analysis is limited by free parameters and the need to probe a macroscopic sample volume. Until now, progress using transmission electron microscopy (TEM) has been limited by instrumental difficulties, but recent technological advances have made quantitative TEM studies …
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Connecting small-angle diffraction with real-space images by quantitative TEM of amorphous thin-films
… on this scale, but data analysis is limited by free parameters and the need to probe a macroscopic sample volume. Until now, progress using transmission electron microscopy (TEM) has been limited by instrumental difficulties, but recent technological advances have made quantitative TEM studies …
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Dark matter, inflation and baryogenesis in supersymmetric extensions of the standard model
… electroweak phase transition constraint NMSSM free parameters and what the subsequent implications on the DM phenomenology and supersymmetric inflation are. Since certain direct detection (DD) searches hint at the light χe 0 1 DM, complementary studies were carried out to explore the lower …
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Using network inference to discover molecular pathways underlying cytokine synergism and age-related neurodegeneration
… PCSF by studying the effect of varying PCSF free parameters and adding annotations for subcellular localization. The PCSF approach is then used to elucidate pathways underlying synergy between cytokines, pro-inflammatory molecules that mediate diverse biological phenomena ranging from …
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A quasi-dynamic and self-consistent rupture model to simulate earthquake ruptures
… dynamic modeling is depending on many free parameters leading to both a high non-uniqueness of the results and large computation times. That decreases the possibilities of full Bayesian error analysis. To assess the named problems we developed the quasi-dynamic rupture model which is …
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Learning task-optimal image registration with applications in localizing structure and function in the cerebral cortex
… faster than competing diffeomorphic, landmark-free algorithms. Finally, we consider the problem of automatically determining the "free" parameters of registration cost functions.
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A quantitative framework For large-scale model estimation and discrimination In systems biology
… to recover the full probability distributions of free parameters (initial protein concentrations and rate constants) for mass action models of receptor-mediated cell death. The width of the individual parameter distributions is largely determined by non-identifiability but co-variation among …
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Non-equilibrium dynamics of ultracold atoms in optical lattices
… from a weakly interacting model with no free parameters. A competing intrinsic decay mechanism arising from collisions between lattice atoms is also investigated. The presence of intrinsic decay can not be accommodated within a non-interacting framework and signals that strong …
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A new approach to fitting linear models in high dimensional spaces
… is theoretically established, when the number of free parameters is infinitely large. In this sense, pace regression outperforms existing procedures for fitting linear models. Dimensionality determination, a special case of fitting linear models, turns out to be a natural by-product. A range of …
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Accelerating vibrational free energy calculations for anharmonic crystals
… potential energy surface, fitting the free parameters of that representation using electronic structure theory, and using the fitted representation to calculate the vibrational wavefunctions and the vibrational free energy. A number of developments to the VSCF method are described. …
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Machine learning of image analysis with convolutional networks and topological constraints
… features and employs many thousands of free parameters that are learned from data. Previous work in low-level vision has been largely focused on completely hand-designed algorithms or learning methods with a hand-designed feature space. We demonstrate that a learning approach with high …
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