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 “"Information Entropy"”.
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Inference and Entropy in Free-Surface Flows
… for deriving closure laws for filtered models – information entropy/energy dissipation maximisation and rheological inference – and apply these to two free-surface flows. In our first problem, we theoretically and numerically examine the interaction between a Blasius boundary layer and …
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Sentiment Analysis Using Deep Learning: A Comparison Between Chinese And English
… using a context vector space model. Chinese information entropy is typically higher than English, we therefore hypothesise that context vector space model can be used to improve the accuracy of sentiment analysis. Our algorithm represents each complex input by a dense vector trained to …
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Optimal sensor placement in structural health monitoring (SHM) with a field application on a RC bridge
… optimization approach incorporating information entropy and cost of the sensor network. As the size of the structure grows, the advantage of the optimal sensor network in damage detection becomes obvious. We also present an innovative field application of SHM using Field Programmable …
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Mitigating the Problem of Non-uniqueness in Fluid-flow Modeling
… matrix analysis and the use of Shannon information entropy, we developed a method to acquire data adaptively for an optimum survey design. Additional data sets from self-potential or seismic surveys have complemented the fluid flow data in different joint inversion methods. sing …
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The application of Bayesian statistics and maximum entropy to Ion beam analysis techniques
… solving inverse problems of the type where the information is expressed in terms of probability distributions. This dissertation presents results of applying the Bayesian formalism, together with the concepts of maximum information entropy and multiresolution pixons, to various inverse problems …
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On the Topic of Portfolio Optimization
This dissertation explores the use of information entropy as a risk measure for the purpose of investment portfolio optimization and selection. First, we present an improved method of applying entropy as a risk in portfolio optimization. A new family of portfolio optimization problems called the …
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An Information-Theoretic Analysis of Adherence to Physical Exercise Routines
… they will exercise. However, with the use of information entropy, a linear regression model, and the R<sup>2</sup> statistic we disprove this hypothesis. Instead, we find that the more a participant exercises, the less habitual they are with the time of day they exercise. Given how busy our …
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Aspects of holography in Lorentz-violating gravity
… is holographic', so that the maximum amount of information allowed in a given region of spacetime is proportional to the area of the boundary rather than the volume of the region. This is against the conventional notion of extensivity of information (entropy), but in accord with Bekenstein's …
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Energy Dissipation and Entropy Generation During the Fatigue Degradation: Application to Health Monitoring of Composites
… method for the laminates based on the cumulative information entropy is reported. The cumulative entropy demonstrates a persistent trend of nonlinear damage evolution typically observed in the experimental measures of the damage in composite materials. In this dissertation, a continuum formulation …
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Time varying channel models for 5G mobile communication systems
… fifth generation (5G). Providing high data rate information transfer to highly mobile users over time varying communication channels remains a shared obstacle. In this thesis, we contribute to these global efforts by providing further fundamental understanding of time varying channels in 5G …
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Flexibility for improved design : probabilistic quasi-optimization of building life cycle impacts and costs
… in the probabilistic design, as measured by information entropy. In a genetically optimized design, quasi-optimum design solutions with 75% of the optimal reduction of costs and impacts are shown to provide a 40% increase in flexibility over the optimized design. These quasi-optimum solutions …
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A Study of Evolutionary Contingency: Characterisation, Mechanisms, and Evidence
… of a source of contingency, namely Shannon's information entropy. Part III focuses on the evidence for and against contingency and attempts to dissolve the methodological pessimism associated with evolutionary contingency in the literature. Previous discussions pertaining to evidence have …
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Understanding Temporal Movement Behaviour Patterns: Measurement, Epidemiology, and Cardiometabolic Health Implications
… heart rate data. Complexity was quantified using information entropy, sample entropy, and Lempel-Ziv complexity, which capture the predictability, regularity, diversity, and temporal structure of movement sequences. Descriptive analyses showed that higher complexity was observed in more active …
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Accurate charge densities of amino acids and peptides by the Maximum Entropy Method
… peptides have been reconstructed by the Maximum Entropy Method (MEM) to study chemical bonds. The MEM model-independently determines the most probable electron density, which simultaneously maximizes the information entropy and fits the X-ray diffraction data. The quality of the MEM densities is …
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Disaster recovery planning of transportation networks
… This argument was also supported by an information entropy analysis. Both analyses suggest that "certainty" was an incentive factor for participating experts while evaluating candidate decision attributes. Throughout this research, I was able to 1) identify knowledge gaps and …
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Seismic precursor identification method integrating acoustic emission physical models and multi-source data
… results were consistent with NT analysis and AE information entropy analysis, validating the effectiveness and superiority of the MCF-B method in identifying failure precursors across scales. (3) Synchronous monitoring of AE and seismicity was conducted in a granite mountain tunnel. Significant …
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Observation and simulation of mid-latitude ice clouds
… approach, the use of the principle of maximum entropy (MaxEnt) for determining the analytical form of PSDs from the perspective of a system is examined. MaxEnt theory states that the probability density function with the largest information entropy among a group satisfying the given properties …
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Evolution and dynamic behavior of transfer RNA in the first two steps of translation
… by domain of life and specificity. Shannon entropy differences between evolutionary profiles of tRNA domain/specificity groups and the representatives of all tRNA species reveal the uniquely conserved nucleotides within each tRNA domain/specificity, consistent with experiment. Comparative …