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 400 for “"fractal"”.
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Fractal Modulation and Encryption
This thesis explores the applications fractal coding techniques for securing data transmission in digital transmission systems. Fractal coding modulation is used to camouflage transmission in which Random Scaling Fractal Signals are used for simulating background noise. This form of 'data …
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Modified Sierpinski Fractal Antenna
Fractal antennas have the potential to provide multi-band solution through the property of self similarity that the fractal shape possess. This thesis deals with some modifications of the original Sierpinski fractal patch antenna, providing additional parameters to optimize in order to get the …
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Computability and Fractal Dimension
… computability theory and various notions of fractal dimension, mainly Hausdorff dimension. An algorithmic approach to Hausdorff measures makes it possible to define the Hausdorff dimension of individual points instead of sets in a metric space. This idea was first realized by Lutz (2000). …
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Higher dimensional fractal uncertainty
We prove that if a fractal set in Rᵈ avoids lines in a certain quantitative sense, which we call line porosity, then it has a fractal uncertainty principle. The main ingredient is a new higher dimensional Beurling and Malliavin multiplier theorem, which allows us to construct band-limited functions …
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Geometry of Fractal Squares
… will examine analogues of Cantor sets, called fractal squares, and some of the geometric ways in which fractal squares raise issues not raised by Cantor sets. Also discussed will be a technique using directed graphs to prove bilipschitz equivalence of two fractal squares.
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Coagulation between fractal aggregates and small particles and fractal properties of marine particles
… purposes. In Part A, coagulation rates between fractal aggregates (200-1000 μm) and small (1.48 μm) particles were studied for collisions induced by differential sedimentation and turbulent fluid shear. The collision frequency functions (beta) between these aggregates and small particles were …
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Blind steganalysis using fractal features
… images with blind steganalysis using fractalfeatures has been proposed in this thesis. Two overarching methods were used to constructthe feature vector; first, using a variation of the Differential Box Counting algorithm forlacunarity estimation to extract the fractal features; and …
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Simulation algorithms for fractal radiation
… analyze a series of structures, referred to as fractals, that radiate electromagnetic waves. The fractal series are components of the so-called "Minkowski island", and the patterns are generated, through successive iterations, from a square patch, usually referred to as the initiator or …
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One-Dimensional Fractal Wave Equations
… wave equations defined by a class of fractal Laplacians. These Laplacians are defined by fractal measures generated by iterated function systems with overlaps, such as the well-known infinite Bernoulli convolution associated with golden ratio and the 3-fold convolution of the Cantor …
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Exploration of the fractal dimension
… and experimental determination of the fractal dimension of different sets. It contains both pure and applied topics. After establishing the ground rules, we look at ways to calculate the fractal dimension of fractal interpolation functions and we end the study with an experiment …
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Quasiconformal mappings and fractal geometry
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Meteorological applications of fractal analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Fractal architecture for 'leagile' networked enterprises.
… (BMS), Holonic manufacturing system (HMS), Fractal manufacturing system (FrMS), Responsive manufacturing etc.This research program focuses on the FrMS, which has vast conceptual advantageous features among these new philosophies, but its implementation has proved very difficult. FrMS is …
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Fractal based speech recognition and synthesis
… and makes use of a new set of features based fractals. The main methods of computing the fractal dimension of speech signals are reviewed and a new speaker-independent speech recognition system developed at De Montfort University is described in detail. Finally, a Least Square Method as well …
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The Dynamic Foundation of Fractal Operators.
The fractal operators discussed in this dissertation are introduced in the form originally proposed in an earlier book of the candidate, which proves to be very convenient for physicists, due to its heuristic and intuitive nature. This dissertation proves that these fractal operators are the most …
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Classification of galaxies using fractal dimensions
… shapes could lead to automatic classification. Fractal dimension, a quantity related to the complexity of a given shape, could be such a measure. Capacity dimension and correlation dimension are two of the several types of fractal dimensions. In this project, correlation dimensions and the …
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Fractal and Statistical Phenomena in Aperiodic Order
… their statistical properties and several fractal phenomena appearing while describing them. <br /><br /> We provide a careful analysis of one-dimensional unimodular Pisot substitutions and show a dichotomy result for their corresponding windows in model set description. The resulting set …
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A fractal analysis of premixed turbulent flames
In this experimental study, the fractal behavior of lean premixed wrinkled turbulent flames was investigated over a range of turbulence conditions. For this purpose a turbulent combustion rig was designed and built in which the turbulence intensity and scale could be independently varied by means …
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