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 21 for “"Permutation Test"”.
-
Efficient Moments-Based Permutation Tests: A Framework, Methods and Applications
The key and only assumption for permutation tests is data exchangeability. In real applications, the data exchangeability condition is not always valid. In order to preserve the exchangeability condition required in permutation tests, we propose a new blockwise permutation test approach based on …
-
Applications of functional data analysis to environmental problems.
… this research introduces both a new permutation test for two-way functional ANOVA and the first simulation study comparing four global F-based statistics in a two-way functional ANOVA setting.
-
Comparative analysis of parametric, nonparametric and permutation methods for differential expression
… technology has resulted in a number of tests being proposed to detect differentials expression. The purpose of study is to compare the parametric, non parametric and permutation tests when applied to microarray data for differential expression analysis. t test (parametric), Mann Whitney …
-
Bayesian Nonparametric Models and Tests for Association in Survival Data
… estimation and increased power for hypothesis testing. The three topics are: (i) The formulation of a test statistic that is a Bayes factor constructed from independent marginalized Polya tree priors, where the Polya tree centering distributions are Gaussian with parameters estimated from the …
-
Genomic response, bioinformatics, and mechanics of the effects of forces on tissues and wound healing
… by 'response to mechanical stimulus'. To test the significance of this result, a permutation test was conducted on the dataset.
-
Using Poisson's Equation to Characterize Brain Tumor Shape
… framework of this method utilizes a Monte-Carlo permutation test to establish significance between sets of characteristic plots. The method has been thoroughly tested for two-dimensional (2D) and three-dimensional (3D) test datasets that include simple geometric shapes as well as contoured …
-
Lake Benthic Algal Production and Extracellular Material
… and whole-lake production, my development of a permutation test for path analysis, and a novel application of the Bayesian principal components analysis, will assist all ecological studies that are often restricted in their sample sizes or compromised by missing data.
-
Sex, Diversity, and Differentiation Within and Between Populations of an Aquatic Hyphomycete
… Index of Association and Parsimony Tree Length Permutation Test analyses did not detect recombination in populations of T. marchalianum , providing evidence for clonality in this species. All Illinois sites, although spatially separated within rivers and between rivers in different watersheds, …
-
Essays on the Economics of Driving and Health
… over time in the Bronx and Brooklyn, and a permutation test confirms the effect is not commonly reproducible using untreated counties.</p> <p>In the second essay, I survey and evaluate the literature on the drunk-driving effects of ride-hailing services like Uber. All but one of these …
-
Weibull mixture model for grouped data and pattern identification in spatial and spatial-temporal data.
… fit the model and a bootstrap likelihood ratio test (LRT) to compare different models. The performance of the bootstrap LRT is studied via simulation and is compared with model selection criteria AIC and BIC. Situations where bootstrap LRT is preferred in model selection are discussed. In the …
-
Modelling text meta-properties in automated text scoring for non-native English writing
… individually or no property in four out of five test sets. We studied how to utilise and combine learners' responses from multiple writing exams. We also proposed a new variant of the transfer-learning ATS model which mitigates the drawbacks of previous work. This variant first builds a ranking …
-
Three Essays on the Interpretability of Random Forests: Methods, Insights, and Innovations
… a new approach for statistical hypothesis testing. The results have implications for various areas of research in which interpretability is crucial for applications. The next three paragraphs summarize the studies presented in this thesis. The ability of random forests to automatically …
-
Evaluation and assignment of significance levels to peptide identifications from the database search programs using resampling approach
A novel application of Monte Carlo permutation testing that improves the calculation of the peptide match significance levels and detection rate in database search programs is demonstrated. Novel k-permuted decoy databases (where k denotes the type and number of permutations) were evaluated for …
-
The effectiveness of online pragmatics instruction with video clips for learners of Arabic
… were mainly obtained through a multiple-choice test (MCT) given to both groups as a pre- and post-test. In addition, both groups answered a few questions regarding their experience learning the three Arabic speech acts after the study. T-test, permutation test, and logistic regression results …
-
Shape variability and sexual dimorphism of the chin: a 3D geometric morphometric analysis
… με μη παραμετρική στατιστική ανάλυση (permutation test) και απεικονίστηκαν με αλληλεπίθεση Προκρούστη. Αποτελέσματα: Τα πρώτα τρία PCs αντιστοιχούν σχεδόν στο 58% της διακύμανσης του σχήματος, η οποία σχετίστηκε κυρίως με το λόγο ύψους προς πλάτος, καθώς και με το πάχος της σύμφυσης. …
-
Estimating source area of pollen and pollen productivity in the cultural landscapes of southern Sweden - developing a palynological tool for quantifying past plant cover
… cultural landscape of southern Sweden, (2) to test the potentials and limits of using mechanistic models of pollen dispersal and deposition to reconstruct past cultural landscapes from fossil pollen assemblages, (3) to estimate pollen productivity for the most common plant taxa characteristic …
-
A Semi-Supervised Predictive Model to Link Regulatory Regions to Their Target Genes
… has been hindered by the lack of appropriate tests for determining APAs with significant differences across multiple libraries. </p><p>We specified a linear effects regression model to identify tissue-specific biases indicating regulated APA; the significance of differences between tissue …
-
High-Dimensional Functional Graphs and Inference for Unknown Heterogeneous Populations
… recognize the limitations of existing methods in testing the equality of multiple functional graphs and develop a novel, permutation-based testing procedure. This method provides a robust, distribution-free approach to comparing network structures across different functional variables, as …
-
Nasopharyngeal carriage with Staphylococcus aureus in healthy children during the first year of life - The Drakenstein Child Health study
… were characterized by antibiotic susceptibility testing, PCR detection of the mecA and Panton-Valentine Leuckocidin (PVL) genes, and typed by targeting the Staphylococcal protein A locus. All genetically related spa types were clustered into spa-clonal complexes using the 'based upon repeat …
-
Some Advanced Semiparametric Single-index Modeling for Spatially-Temporally Correlated Data
… using kernel smoothing and also provide a permutation based testing procedure to detect multiple change points. We show the asymptotic properties of the permutation testing based procedure. The advantage of our approach is demonstrated using the mortality data of Seoul, Korea from January, …
Page 1 of 2