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 77 for “"random process"”.
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A Topological Study Of Stochastic Dynamics On CW Complexes
… the implications on the underlying space. The random process on the complex is motivated from Ito diffusions on smooth manifolds and Langevin processes in physics. We associate a Kolmogorov equation to this process, whose solutions can be interpretted in terms of generalizations of electrical, …
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Optimal parameter adaptive estimation of stochastic processes
… detection and least squares estimation of vector random processes. The problem is formulated in the following context: A random process, out of a countably infinite collection of (not necessarily Gaussian) vector random processes with known distributions, is observed with additive white Gaussian …
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Random Vibrations of Structures Under Parametric and Non-Parametric Earthquake Loads
… previously, especially from the point of view of random vibration. The secondary objective is to demonstrate the versatility of the mathematical theory of the Markov random process in structural dynamics applications.
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Some Techniques in Universal Source Coding and Coding for Composite Sources
… A composite source has a switch driven by a random process which selects one of a possible set of subsources. We derive some convergence results for estimation of the switching process, and use these to prove that the entropy of some composite sources may be computed. Some coding techniques …
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Texture description and segmentation in image processing
… containing a signal which has some measure of randomness. This thesis is concerned with the description of homogeneous texture in terms of a signal model and to develop a means of spatially separating regions of differing texture. A signal model is presented which is based on the assumption …
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An Empirical Approach to Evaluating Sufficient Similarity: Utilization of Euclidean Distance As A Similarity Measure
… reference mixture (representative of the random process) is sufficiently similar in dose-response to a candidate mixture resulting from a random process. Four similarity measures based on Euclidean distance are developed to aid in the evaluation of sufficient similarity in dose-response, …
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Accuracy bounds for normal-incidence acoustic structure estimation
… is computed for the estimation of unknown, nonrandom reflection coefficients in a medium containing only discrete reflectors; special attention is given to the one- and two-reflector situations. The bound's ability to predict estimator performance is demonstrated, as is the inadequacy of a …
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Spectral analysis of random number generators
… a method for testing the fairness of pseudorandom number generators using the Discrete Fourier Transform. We will show how the concept of a random process can be used in a representation for random discrete time signals. Using this concept, we have focused on the mathematical representations …
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Randomness Tests for Binary Sequences
… digital world. Though sometimes underestimated, randomness plays a key role in cryptography, generating unpredictable keys and other related material. Hence, high-quality random number generators are a crucial element in building a secure cryptographic system. In dealing with randomness, two key …
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A comparison of fixed parameter versus adaptive digital tracking filters
… state tracking techniques over a range of process and measurement noise environments is considered. The problem is placed in the context of tracking a maneuvering vehicle from noisy position data with the vehicle accelerations considered as a random process about which the first and second …
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A three-dimensional analytical study of spatial variability of seismic ground motions
… from which the source motion is modeled as a random process specified by a power spectral density function. To separate the path effect from the source effect, a multi-degree-of-freedom system is chosen as the ""substitute system"" which is characterized by the equivalent transmission effect …
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Leveraging genetic time series data to improve detection of natural selection
… allele, but inheritance across generations is a random process, and change is guaranteed even under neutral (no selection) conditions. The magnitude of pure genetic drift, the neutral random process that produces genetic change even in the absence of disruptive forces, is determined by the …
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MIMO radar: signal processing, waveform design, and applications to synthetic aperture imaging
… of synthetic aperture imaging systems. A signal processing architecture for MIMO radar is used to understand the applicability of MIMO for synthetic aperture radar (SAR) and synthetic aperture sonar (SAS) systems. MIMO SAR/SAS is shown to be a natural extension of standard multichannel synthetic …
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Designing hypothesis tests for digital image matching
… and mismatch hypotheses for samples of this random process is derived. The test is written conveniently in terms of a statistic of the two images and a scalar decision threshold. The analytical advantages of a solution derived from first principles are illustrated with the derivation of …
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Value Creation Through Joint Venture and Strategic Alliance Formation
… the argument that alliance formation is not a random process. A firm's choice of entering an alliance designed as diversifying or non-diversifying strategy is a result of a complex interaction of external factors and internal needs. Finally, using the change in excess value from the year prior …
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Studium exprese mutantních alel a stavu X inaktivace ve vztahu ke klinickým projevům vybraných monogenních X vázaných onemocnění
… imbalance is compensated by X inactivation (XCI) process, also known as primary X-inactivation, occurring in the early stage of embryogenesis. X inactivation is a random process and females are mosaics of two cell populations. The ratio of expressed alleles in women can be random (50:50) or skewed …
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Inferring mechanisms of V(D)J recombination using statistical inference on high-throughput immune repertoire data
… of B cell and T cell receptors through a random process called V(D)J recombination. Receptor diversity arises during recombination from the combinatorial assembly of V(D)J genes and the junctional deletion and insertion of nucleotides. While molecular experiments have established our …
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Random vibrations of bladed-disk assembly under cyclostationary excitation
Random vibration of a bladed-disk assembly is studied. A stochastic model for the excitation is developed. A unique feature of this model is the statistical periodicity of the blade forces called cyclostationary. A random process is called wide sense eyeclostationary and its statistics are periodic …
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The effects of spectral estimation on matched filter design
… estimators derive their estimates from a random process realization, the estimates themselves are probabilistic in nature. The performance of MAMF's based on these estimates must, in turn, be distributed in a probabilistic sense. This thesis investigates the performance of MAMF's designed …
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Stochastic methods for uncertainty quantification in radiation transport
… transport. The gPC represents second-order random processes in terms of an expansion of orthogonal polynomials of random variables. The KL expansion is a Fourier-type expansion that represents a second-order random process with known covariance function in terms of a set of uncorrelated …
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