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 19 of 19 for “"statistical computing"”.
-
RCC: A compiler for the R language for statistical computing
R is a programming language for statistics that enables users to express computation at a high level of abstraction. Until now, its only implementation has been the R interpreter. Though interpretation is convenient for interactive use, it hampers the performance of computation-intensive programs. …
-
The Advancements on the Interface of Statistical Computing, Survival Analysis, and Degradation Analysis
… analyzing complex data often requires advanced computing methods to carry out model estimation and inference. Motivated by computational challenges in survival analysis and a specific dataset in degradation analysis, this dissertation focuses on the applications of advanced computational …
-
Absolute Frequency Data for Statistical Computing: A Comparison With Sample-Based Approaches and Guidelines for Improving Software Implementation
… of this thesis is to assess the decrease in computing time and increase in storage efficiency gained by performing statistical computations using absolute frequency data. These results quantify the reduction in data storage requirements for absolute frequency data relative to using the sample …
-
A framework for the statistical analysis of mass spectrometry imaging experiments
… imaging datasets. Two of the primary goals of statistical analysis of MS imaging experiments are classification (for supervised experiments), i.e. assigning pixels to pre-defined classes based on their spectral profiles, and segmentation (for unsupervised experiments), i.e. assigning pixels to …
-
Mahalanobis kernel-based support vector data description for detection of large shifts in mean vector
Statistical process control (SPC) applies the science of statistics to various process control in order to provide higher-quality products and better services. The K chart is one among the many important tools that SPC offers. Creation of the K chart is based on Support Vector Data Description …
-
Impact of Specification Changes on Chloride Induced Corrosion Service Life of Virginia Bridge Decks
… salts that recognizes and incorporates the statistical nature of factors affecting the corrosion process is developed. The model expands on an existing deterministic model using statistical computing techniques, including resampling techniques such as the parametric and simple bootstrap. …
-
The impact of coronavirus disease of 2019 (COVID-19) on household food security in high density residential areas of Lusaka, Zambia: experiences from Ng’ombe settlement.
… statistics, paired t-test and chi-square using R statistical computing software and excel. The results were presented using tables, pie charts and graphs. The study revealed that Ng’ombe residents had a devastating experience during the COVID 19 era among which include reduction in income, hunger, …
-
The impact of coronavirus disease of 2019 (COVID-19) on household food security in high density residential areas of Lusaka, Zambia: experiences from Ng’ombe settlement.
… statistics, paired t-test and chi-square using R statistical computing software and excel. The results were presented using tables, pie charts and graphs. The study revealed that Ng’ombe residents had a devastating experience during the COVID 19 era among which include reduction in income, hunger, …
-
The Limitations to the Expansion Strategy of the Building Materials Industries in Developing Countries with Special Reference to Kenya
… building materials were entered manually in the statistical package for social science (SPSS) and were analysed and evaluated using statistical techniques with the help of statistical computing Minitab and SPSS Packages. The techniques used are the chi-square test and Spearman correlation …
-
An Analysis of Trends of Generic Drugs and Biologic Prices in the U.S.
… by the inflection points. We used R Project for Statistical Computing version 3.6.1 for the analysis.</p> <p><strong>Results:</strong>The median generic prices at market entry represented 65.7% of the brand prices and 26.0% three years after generic entry. The median reference drug prices …
-
Compiler and runtime techniques for optimizing dynamic scripting languages
… programming language is a convenient system for statistical computing. In this era of big data, R is becoming increasingly popular as a powerful data analytics tool. But the performance of R limits its usage in a broader context. The thesis introduces a classification of R programming styles into …
-
Variational approximation for importance sampling and statistical inference on social influence
Monte Carlo methods are widely used in statistical computing area to solve different problems. Social network analysis plays an importance role in many fields. In this dissertation, we focus on improving the efficiency of importance sampling, detecting the degrees of influence in networks, and …
-
Chemical Differentiation of Human Osseous, Non-human Osseous, and Non-osseous Materials Using Scanning Electron Microscopy - Energy Dispersive X-ray Spectrometry (SEM/EDX) and Multivariate Statistical Analysis
… in R, version 3.0.1, by the R Foundation for Statistical Computing using PCA and Fisher Linear Discriminant Analysis. A two-tiered analysis was undertaken to improve discrimination between sample groups. The first tier involved distinguishing between osseous and non-osseous materials. After …
-
Delineamento experimental em blocos incompletos : estudo de casos particulares
… ao software estatístico R (Project for Statistical Computing) e exemplos práticos desenvolvidos neste, tendo por base a temática do delineamento experimental com blocos. O capítulo sete apresenta diversos trabalhos de investigação com abordagens recentes ao delineamento experimental em …
-
Essays on the Economic Analysis of Transportation Systems
… <p>In the second chapter, we perform a statistical comparison of driving travel demand on toll facilities between Electronic Toll Collection (ETC) users, as a treatment group, and non users, as a control group, in order to examine the effect of ETC on travel demand that uses toll …
-
Applications of stochastic simulation in two-stage multiple comparisons with the best problem and time average variance constant estimation
In this dissertation, we study two problems. In the first part, we consider the two-stage methods for comparing alternatives using simulation. Suppose there are a finite number of alternatives to compare, with each alternative having an unknown parameter that is the basis for comparison. The …
-
Iterated Grid Search Algorithm on Unimodal Criteria
The unimodality of a function seems a simple concept. But in the Euclidean space R^m, m=3,4,..., it is not easy to define. We have an easy tool to find the minimum point of a unimodal function. The goal of this project is to formalize and support distinctive strategies that typically guarantee …
-
The efficacy of strategies used to minimise and prevent cisplatin ototoxicity in patients
… analysed using R, a software environment for statistical computing and graphics. Descriptive statistics and the following inferential statistical tests, Chi-squared, Fisher’s exact tests and the Wilcoxon signed-rank test for paired samples, were used to determine significant associations …
-
Pharmacotherapy for Social Anxiety Disorder and Posttraumatic Stress Disorder: New Meta-Analytic Approaches to Synthesising the Evidence
… with SAD and PTSD according to the Diagnostic Statistical Manual for Mental Disorders (DSM, all versions) were included in the individual reviews (i.e. for chapter two, three, five and six). In chapter three adolescents and adults with common mental disorders (depression, GAD, PD, OCD, PTSD, …