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.
Results
Showing 1 to 20 of 27 for “"power-law distribution"”.
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Structure in combinatorial optimization and its effect on heuristic performance
… on randomly generated benchmarks using a uniform distribution. As a result, SLS algorithms for MAX-SAT perform exceptionally well on uniform random instances. However, instances from real-world applications of MAX-SAT have a structure that is not captured in expectation by uniform random problems. …
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Analytical and statistical approaches toward understanding sedimentation in siliciclastic depositional systems
Recent studies of turbidite bed thickness distributions have demonstrated power law and other statistical distributions. Chapter 2 explores the different distributions which may express fan processes and may be used as a tool to classify environments. Chapter 3 illustrates a correlation between …
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Evaluating levy flight parameters for random searches in a 2D space
… such as honey bees statistically belong to a power law distribution. Optimality of such random searches has been a topic of extensive research because knowing their optimal parameters may help applied sciences. Viswanathan et al. have shown the inverse-square power law to be the optimal law …
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Complexity as Aging Non-Poisson Renewal Processes
… the same macroscopic outcome, namely an inverse power law distribution density of events occurrence. To solve this ambiguity, a numerical instrument, based on the theoretical analysis of the aging properties of renewal systems, is introduced. The application of this method, called renewal aging …
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Aerosol Condensational Growth in Cloud Formation
… initial relative humidity values according to a power law distribution, we studied the effects of atmospheric stochastic RH distribution on the growth of CCN.
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Power-law distributions in events involving nuclear and radiological materials
… with established statistical and mathematical distributions. Power-law distribution is a good candidate because it is a probability distribution with asymptotic tails, and thus can be applied to study patterns of rare events of large deviations, such as those involving nuclear and radiological …
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The structure and evolution of the African air transport network
… 2023. With respect to the network's structure, a power-law distribution appropriately characterises the networks degree distribution. The ‘golden tri-angle' between Johannesburg O.R. Tambo, Cape Town, and Durban King Shaka plays a dominant role in the network's structure when considering airline …
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On Volatility, Outliers, and Uncertainty
… and asset volatility as being drawn from a power law distribution. This paper aims to quantitatively confirm this characterization, specifically for market volatility. Further, this paper identifies whether or not volatility expectations exhibit similar power law characteristics. Goodness of …
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Resource-Efficient Machine Learning via Count-Sketches and Locality-Sensitive Hashing (LSH)
… work because most large-scale datasets follow a power-law distribution where a small subset of the data contains the most information. Therefore, we can avoid wasting computational resources by focusing only on the most relevant items. In this thesis, we explore how to use locality-sensitive …
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Topics in Dynamic programming and Economic Networks
… featuring robust characteristics such as a power-law distribution of firm sizes. This multifaceted exploration contributes insights to the understanding of the existence and uniqueness of equilibrium in dynamic programming and economic networks.
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Topics in Dynamic programming and Economic Networks
… featuring robust characteristics such as a power-law distribution of firm sizes. This multifaceted exploration contributes insights to the understanding of the existence and uniqueness of equilibrium in dynamic programming and economic networks.
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REPUTATION COMPUTATION IN SOCIAL NETWORKS AND ITS APPLICATIONS
… can observe the entire network including degree distributions and relationships among nodes. In a micro-level approach, the entity is one of the nodes in a network and therefore can only observe the information local to itself, such as its own neighbors behaviors. In particular, we study …
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Chaos and Localisation
… rates shows that they obey a universal power-law distribution, in agreement with Anderson localisation theory. This is demonstrated for a one-dimensional model as well as for the real three-dimensional atom. We also discuss the implications of the universal decay-rate distributions for …
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Decoherence, Master Equation for Open Quantum Systems, and the Subordination Theory
… sojourn times are distributed with an inverse power law. Thus, a proposal to turn the model for Poisson fluorescence intermittency into a model for non-Poisson fluorescence intermittency is made. The collision-like interaction of the two-state system with the environment is assumed to takes …
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Essays on Information Technologies, Social Networks and Individual Economic Outcomes
… model of how technology may be reshaping the distribution of individual income in the US between 1960 and 2008. First, is shows fractal patterns of the income distribution, which indicate the presence of an increasingly unequal power law distribution at the top. Then, using IRS individual tax …
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The evolution of radio galaxies
… to evolve with redshift. I also study the distribution of the jet properties as a function of redshift. From currently available data it is not possible to constrain the shape of the distribution of environment density or age, but jet power is found to follow a power-law distribution with …
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The impact of author name disambiguation on knowledge discovery from large-scale scholarly data
… such as preferential attachment generating the power-law distribution of vertex degree and to false validation of theories about the choice of collaborators in scientific research. This may result in ill-informed decisions about research policy and resource allocation. Besides measuring the …
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Geophysical Imaging of Earth Processes: Electromagnetic Induction in Rough Geologic Media, and Back-Projection Imaging of Earthquake Aftershocks
… resulting electromagnetic responses present a power law distribution, rather than a smooth response polluted with random, incoherent noise as commonly assumed; moreover, they are examples of fractional Brownian motion. Furthermore, the results indicate that the fractal behavior of …
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Logic and Mechanism of an Evolutionarily Conserved Interaction in PDZ Domain
… in proteins is highly heterogeneous, and fit a power-law distribution where most residues have very few co-evolutionary links with other residues and a few residues have many co-evolutionary links. The data is very consistent with extensive mutagenesis studies in several systems. Together, these …
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Spam Analysis and Detection for User Generated Content in Online Social Networks
… OSNs does not follow commonly assumed exponentialdistributions. We also show that the user posting behavior in these OSNsfollows stretched exponential distributions instead of widely accepted powerlaw distributions. Our discovery lays a foundation for user behavior analysisin social networks, and …
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