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 19 of 19 for “"vector model"”.
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A vector model for analysis, decomposition and segmentation of textures
A model, which assumes tonal decomposition of textures, is proposed for texture analysis and segmentation. The model is based on an interpretation in which the tones form an orthogonal basis in a vector space of possible textures. Three methods for texture segmentation, which employ a texture …
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A Mechanistic State Vector Model for the Interaction of Ionizing Radiation With Cells
Made available in DSpace on 2014-12-11T00:00:15Z (GMT). No. of bitstreams: 1 7511550.pdf: 2477804 bytes, checksum: c9ce0faf071cb167dbfab2936444e172 (MD5) Previous issue date: 1974
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An Ocean Surface Wind Vector Model Function For A Spaceborne Microwave Radiometer And Its Application
Ocean surface wind vectors over the ocean present vital information for scientists and forecasters in their attempt to understand the Earth's global weather and climate. As the demand for global wind velocity information has increased, the number of satellite missions that carry wind-measuring …
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Computational Studies in Chemical Quantum Physics
Two stochastic dynamic models are used to study several aspects of curve crossing phenomena in dissipative systems. A surface hopping model is used to test the qualitative predictions of earlier theories. The simulation results agree well with the qualitative picture. Results are obtained for an …
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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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Building an Intelligent Filtering System Using Idea Indexing
The widely used vector model maintains its popularity because of its simplicity, fast speed, and the appeal of using spatial proximity for semantic proximity. However, this model faces a disadvantage that is associated with the vagueness from keywords overlapping. Efforts have been made to improve …
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Integrating Contemporary Attitude Theory With the Concept of Commitment (Involvement, Smoking)
… to the consequences of smoking. Commitment model formulations resembling three compensatory attitude models were investigated: the Fishbein attitude model, a weighted-average model, and the Vector model.
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Collective effects in multi-field inflation
We present a new model of multi-field inflation in the limit when, N, the number of fields is very large. To implement this limit, we reformulate the problem in terms of a colourless bilocal field [(x; y) which encodes the collective degrees of freedom of the N scalar fields. As a concrete example, …
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Automatic speaker verification and diarization on VoxCeleb data collection
… a variety of datasets are needed to train good models. Current datasets include NIST SRE, VoxCeleb, etc. In this work, to collect a non-English speaking dataset, the pipeline of VoxCeleb data collection is adopted to collect an East Asian language-speaking Celebrities (EACeleb) dataset. To …
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High-Energy YB-Doped Femtosecond Fiber Lasers
… of the pulse. Therefore, I developed two models that can help us to optimize the pulse characteristics such as the pulse energy, spectral bandwidth and de-chirped pulse width. I also introduce two techniques that result in increasing the pulse peak power and spectral bandwidth. The …
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Security information management with frame-based attack presentation and first-order reasoning
… on the alert contexts and attack ontology, Space Vector Model (SVM) is applied to categorize the intrusion stages. Furthermore, a robust Variant Packet Sending-interval Link Padding algorithm (VPSLP) is proposed to prevent links between the IDS sensors and the FAR-FAR agents from traffic analysis …
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Evaluation and Clinical Implementation of a Dual-Energy CT Stopping-Power Ratio Mapping Technique for Proton-Therapy Treatment Planning
… Image-Reconstruction Technique built on a Basis Vector Model (JSIR-BVM), which effectively reconstructs basis materials by using the spectral information from two different energies. In previous studies, we successfully showed the potential of using the basis-material maps reconstructed with …
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Cutter-workpiece engagement identification in multi-axis milling
… swept volume generation, in-process workpiece modeling and Cutter Workpiece Engagement (CWE) algorithms for finding the instantaneous intersections between cutter and workpiece in milling. One of the steps in simulating machining operations is the accurate extraction of the intersection …
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Thermal and Optical Simulations of Vertical Cavity Surface Emitting Lasers
… lasers (VCSELs). The lattice temperature model is derived based on carrier transport and the conservation of energy. A novel treatment is applied to model distributed Peltier heat at a heterojunction by use of a Monte Carlo simulation. Peltier heat is found to be a major heat contributor, …
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Investigation into factors affecting perceptual stability of the world during smooth pursuit eye movements
… in the last few decades with the introduction of vector addition-like models. However, it is not well known how closely the eye movement compensation mechanism follows the rules of vector algebra. Evidence for the presence of a signal coming from the moving eye has come from a variety of …
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Modelling geometric uncertainties in prostate radiotherapy
… of geometric errors into existing methods for modelling theeffectiveness of radiotherapy treatment. In this work the impact of geometric errors onthe tumour control probability (TCP) for prostate radiotherapy is investigated.Positional measurement data are analysed in a manner which …
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A Behavioural, Molecular and Lesion Examination of Hippocampal Contributions to Morris Water Maze Acquisition
… acquisition of the MWM are discussed in terms of models of navigation. From this, we suggest that the water maze task is solved using a vectormodel of navigation, rather than the widely reported, and accepted, cognitive mapping theory of spatial learning. The behavioural lesion data also supports …
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Diversified strategies for improving iron bioavailability of maize
… (LHb) for FeBA using the in vitro Caco-2 cell model compared to bovine hemoglobin (BHb), and ferrous sulfate (FeSO4). When iron sources were tested alone, the FeBA values of LHb and BHb were 19% (P > 0.05) and 113% (P < 0.001) higher than FeSO4, respectively. However, when iron sources were …
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Imaging Techniques for Proton Range Determination in Proton Therapy
… image reconstruction method with a linear basis vector model (JSIR-BVM) was integrated with a clinical Monte Carlo-based treatment planning system (TPS) for dose prediction comparison with the standard stoichiometric SECT method. Percentage deviation from the ground-truth volume receiving 80% of …