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 191 for “"prior information"”.
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Prior information for brain parcellation
… of problems. This framework employs anatomical prior information in order to simplify the detection process. In this thesis, we experiment with different types of prior information such as spatial priors, shape models, and trees describing hierarchical anatomical relationships. We pose a maximum …
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Surface Prior Information Reflectance Estimation (SPIRE) algorithms
… approaches, we assumed the presence of a prior reflectance image cube and ensembles of typical multiplicative and additive illumination noise vectors, and developed algorithms which estimate reflectance using this prior information. These algorithms were developed under the additional …
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Prior Information Guided Image Processing and Compressive Sensing
… models if the given data lacks some certainties. Prior information, including geometric priors, high frequency priors, spatially variant intensity variations and image regularities, assists to establish mathematical models by providing a more accurate description of the underlying signal/image. We …
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Application of Prior Information to Discriminative Feature Learning
… In this dissertation, besides incorporating prior knowledge about image labels into the image classification as most prevalent feature learning methods currently do, we also explore some other general-purpose priors and verify their effectiveness in the discriminant feature learning. As a …
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Accelerating Learning of Quantum Systems using Prior Information
… system, which is of known construction with prior experience. A natural question is then, can we accelerate learning of quantum systems using prior information? In this thesis, we describe how prior information can be exploited to reduce resources over current baseline methods. In the first …
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Prior -Information -Driven Magnetic Resonance Imaging and Magnetic Resonance Spectroscopic Imaging
The research in this thesis is aimed at addressing this issue by studying the properties and vulnerabilities of existing methods, developing new methods to overcome existing limitations, and applying new methods to biomedically relevant applications. By studying the connection among existing …
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Multi-Controller Strategies for Systems With Discrete Acquired and Biased Prior Information
Made available in DSpace on 2014-12-10T19:07:09Z (GMT). No. of bitstreams: 1 7317416.pdf: 4405409 bytes, checksum: dad33ed860456169caeec72f0ffa3d9f (MD5) Previous issue date: 1972
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Multi-electrode stimulation and measurement patterns versus prior information of fast 3D EIT
… to obtain without incorporating some sort of prior information about the material distribution characteristics. Given the ill-posedness of the EIT problem coupled with the limited number of collectable boundary voltage measurements, the resulted discrete system is heavily underdetermined and …
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Bayesian dynamic borrowing strategies with power priors and quantifying prior information for circular priors.
… dissertation concerns two problems in Bayesian prior construction. One is the development of a dynamic historical borrowing strategy tailored for settings with small current or historical data samples. The second concerns strategies for the assessment of circular priors. Chapter two introduces a …
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A methodology for state determination without prior information using X-ray pulsar navigation systems
… position using XNAV in the absence of any prior state information, a scenario sometimes referred to as the cold-start problem or the lost in space scenario. In these scenarios, the spacecraft cannot communicate with Earth-based systems, nor is any prior state information available, …
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A Comparative Study of Single-Equation Estimation Methods Using Prior Information: A Monte Carlo Study
Made available in DSpace on 2014-12-10T23:08:43Z (GMT). No. of bitstreams: 1 7105182.pdf: 5567775 bytes, checksum: fe9d44ac8ca0f2272d8927cce89a5d14 (MD5) Previous issue date: 1970
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Compressed Sensing Based Image Restoration Algorithm with Prior Information: Software and Hardware Implementations for Image Guided Therapy
… based image restoration algorithm by applying prior image information and free-form deformation fields for image guided therapy. The core algorithm we developed solves the image restoration problem for handling missing structures in one image set with prior information, and it enhances the …
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Incorporating prior information into geophysical inversion: from regularized inversion of thermal data to a framework using conditional variational autoencoders
… not resemble geologic structures. Incorporating prior information into inversion can encourage geologic realism in recovered models, but how best to do so remains an open research question. I develop methods to inject prior information into inversion to recover more geologically realistic models. …
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IMPROVING RESOLUTION IN WRIST SPECT WITH CONVERGING COLLIMATORS AND CT ANATOMICAL PRIORS
… collimators and by incorporating anatomical prior information. Phantom experiments have shown that a 3mm single-pinhole system can achieve a 4mm resolution at clinical count levels, but a 3mm resolution required 4-times as many counts. Computer simulations showed that by incorporating CT …
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Analysis of weighted l̳₁-minimization for model based compressed sensing
… this topic. Subsequent results followed, where prior information was imposed on the sparse signal and algorithms were proposed and analyzed to incorporate this prior information. In[13] Xu suggested the use of weighted l₁-minimization in the case where the additional prior information is …
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Absolute electrical impedance tomography and spectroscopy: an Orthogonal Chirp Division Multiplexed (OCDM) approach
… when general assumptions are used to form the prior information about the object. This problem is intensified when selecting a multiplexing technique that introduces significant data inconsistencies. Recent attempts to solve this problem are to use data from previous empirical studies that …
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Shrinkage Estimation for Aalen's Additive Model
… regression coefficients when some uncertain prior information is available about these coefficients. More precisely, we combine unrestricted estimators and estimators that are restricted by a linear hypothesis (prior information) and produce James-Stein-type of shrinkage estimators. We …
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Perception, expectation and uncertainty in autism
… how autistic individuals extract predictive information from their environment, how this predictive information influences perception in autism and how these processes are associated with other clinical features of autism. In chapters 1 & 2, I start the thesis by reviewing the literature on …
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Use of prior distributions from aerial photographs in forest inventory
… stands) using aerial photo volume tables as the prior information source. Aerial photographs provided a reliable source of information even though most photographs were nearly five years old. For a given level of precision within a particular stand, Bayesian methods reduced the required field …
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Essays on Determinants of IPO Liquidity and Price Adjustments to Persistent Information in Option Markets
… overreaction tends to occur following persistent information in the options market. More specifically, I compare the reactions between growth and value investors, and small and large investors conditional on past price reactions. My empirical results suggest that value investors react more …
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